Upload
niaxxu
View
50
Download
6
Embed Size (px)
Citation preview
Regarding the dental surveyor select the incorrect answer:
Y
A dental surveyor is used to determine the path of insertion.
A dental surveyor can be used by the dentist and the technician.
The surveyor is used to determine the maximum convexity of teeth only
It is an essential instrument for proper designing a RPD
Which of the following statements is incorrect regarding guiding planes:
1. They are used to limit the path of insertion. 2. They dont always need to be prepared 3. Guiding plane adjacent to a free end saddle should be 4mm in length 4. Guiding planes are determined at the surveying procedure of the primary cast.
1+2
1+2+3
2+3+4
2+3
3 only
With regard to cast tilting select the correct answer:
N
Tilting the cast should be the first choice for selecting the path of insertion.
Surveying at zero tilt should be performed for every case.
Tilting the cast will always insure the presence of retentive undercuts for clasps.
Tilting the cast cannot eliminate soft tissue undercuts.
None of the above
Which of the following lever systems is considered to be the most damaging to the abutment tooth?
Y
Class I
Class II
Class III
(1) Periodontal ligament fibers are arranged to resist axial forces more effectively than non-axial forces.
(2) Therefore, a Class III RPD is better than a free end saddle RPD in terms of force direction on abutment
teeth.
First statement is___________, second statement is_____________.
Y
correct, correct
false, correct
correct, false
false, false
the retentive tip of the clasp is placed in the middle third to reduce the torquing effect on the abutment
tooth.
Y
False
True
A free-end saddle RPD differs from a bounded saddle RPD in
Y
Support
Indirect retention
Clasp design
Denture base considerations
All of the other choices (above and below)
A periodontally weakened abutment could :
Y
Affect the clasp type
Affect RPD design
Affect RPD support
All of the other choices
All of the following are borders of the buccal shelf area except:
Y
External oblique ridge
Masseter muscle
Retromolar pad
Buccal frenum
The crest of the residual ridge
Regarding retromylohyoid fossa:
Y
It is the key support area in the mandible
It is bounded anteriorly by the superior constrictor muscle
It is bounded laterally by the tongue
It is distal and lateral to the internal oblique ridge
It is not essential for retention
Regarding the genial tubercles:
N
They are the insertion of multiple muscles
They need relief in the denture in the very resorbed ridges
They are almost in the midline of the mandible
They are bony prominences covered by thin soft tissues
All of the above
The distal extension of your lower complete denture could be affected by:
N
The superior constrictor muscle
the palatoglossus muscle
The pterygomandibular raphae
The ramus
All of the above
When considering the clinical scenario known as Combination (Kellys) Syndrome, all of the following are true EXCEPT:
N
This scenario is most commonly associated with a fully edentulous mandibular arch opposed by a
partially edentulous maxillary arch (Kennedy Class I).
It is helpful to maintain maxillary anterior teeth (even as overdenture abutments) to prevent this
clinical scenario from occurring.
This syndrome results mainly from an imbalance in loading and support between the dentate and
edentulous portions of the opposing arches.
This syndrome is a common clinical scenario when the patient is fully edentulous in both arches.
a and c
a and d
b and d
Overdenture abutments are favorable for all of the following reasons, EXCEPT:
Y
They reduce residual ridge resorption
They provide the patient with improved proprioceptive feedback during mastication
They provide the psychological advantage of natural feeling for the patient They provide improved support for the overdenture
None of the other choices (above and below)
Which of the following is TRUE regarding natural overdenture abutment without attachments?
a. Overdenture abutments should passively contact the denture during rest
b. Overdenture abutments should contact the denture only during function c. The height of the abutment should be at the level of the gingiva d. The root canal should always be endodontically treated
N
A+B
B+C
A+C
A+B+C
All of the above
The rate of residual ridge resorption (after the first year of edentulousness is generally greater in the
mandibular residual ridge than the maxillary. How much greater?
Y
2 times greater
3 times greater
4 times greater
5 times greater
The statement is incorrect. The rate of bone resorption in the mandibular residual ridge is the same as
the rate of bone resorption in the maxillary residual ridge
Which of the following clinical situations usually has the poorest prognosis?
N
Maxillary single complete denture opposing full natural mandibular dentition
Maxillary single complete denture opposing mandibular Kennedy Class I RPD
Maxillary single complete denture opposing mandibular Kennedy Class IV RPD
Mandibular single complete denture opposing full natural maxillary dentition
a and b
b an c
Hanau described five factors that affect occlusion in complete dentures. If a patient is to wear a single
complete denture opposing a fully dentate arch and we desire a balanced occlusal scheme, which of the
following factors is it most practical to adjust in the complete denture:
Y
Condylar guidance
Occlusal plane
Cusp height/ angle
Incisal guidance
Compensating curves
When considering the material to use for the artificial teeth in a single complete denture opposing
natural dentition, all of the following statements are true EXCEPT:
N
Acrylic resin artificial teeth bond chemically to the denture base acrylic and are easy to adjust and
reshape.
Although porcelain artificial teeth are difficult to adjust, they have the advantage of causing less wear
(abrasion) to opposing natural teeth than acrylic.
Although cast metal occlusal surfaces can be custom designed to match to opposing natural teeth, the
technique is often expensive and time-consuming.
Amalgam stops are placed in the occlusal surfaces of artificial porcelain teeth to reduce the wear of the porcelain by the natural teeth.
a and c
b and d
If a patient has Combination syndrome it is probable that we will see all of the following EXCEPT: Y
Anterior rotation of the mandible during occlusion (Class III / prognathic relationship)
Papillary hyperplasia of palatal soft tissue
Reduction of the Vertical Dimension of Occlusion
Maxillary anterior residual ridge resorbs and replaced by resilient flabby ridge
Occlusal plane tilts anteroposteriorly: anteriorly upwards and posteriorly downwards
Pendulous overgrowth of the retromolar pads
Epulis Fissuratum in maxillary labial vestibule
According to Monsons Spherical Theory of Occlusion, a number of occlusal landmarks lie on the surface of a 10 cm radius sphere with its center in the region of the glabella. These landmarks include all of
the following EXCEPT:
Y
The labial gingival margins of the mandibular central incisors
The centers of rotation of the mandibular condyles
The cusp tips of the mandibular second molars
Points approximately between the bottom two-thirds and top one-third of the mandibular retromolar
pads
Points approximately at the mesial slope inclines of the mandibular canines
According to Attwood classification of ridges, Class IV is:
Y
Good ridge without extraction.
Immediate post extraction.
Knife edge ridge
Well-rounded ridge form
Negative or concave form.
The most favorable ridge contour for complete denture is:
Y
High ridge with flat crest and parallel sides.
V shaped.
Knife edge.
Flat ridge.
Ridge with multiple spicules.
When making the final impression of the lower edentulous arch, the patient is asked to exert a closing
force while the dentist exerts a downward pressure. This is to activate:
Y
The masseter
The Pterygo mandibular raphe
The Pterygo mandibular raphe and the masseter
Medial Pterygoid and the Pterygomandibular raphe.
The masseter and medial pterygoid.
Once a stable and retentive peripheral seal is achieved and appropriate spacing is incorporated, your
choice of the final impression material for complete denture would be:
Y
addition silicone
polyether.
zinc oxide eugenol.
alginate.
secondary importance and dependant on the dentist preference.
Your impression technique of choice for ridges that equate to Atwood class V and VI is:
Y
Admix
Conventional technique.
Mucostatic impression on the ridge and mucocompressive else where
The final impression is taken with green stick tracing compound. Using the heated spoon-end of a Le Cron carver, the green stick related to the crestal ridge is removed and the related area of the tray is
perforated. Light-body Poly Vinyl Siloxane is injected into the buccal and lingual shelves of the green stick
and the tray is gently inserted in the mouth . This is a description of the impression technique used for : Y
The fibrous (un-employed) posterior mandibular ridge.
Flabby ridge
Atwwod class V lower ridge.
Immediate dentures.
Neutral Zone technique.
With regard to the Neutral Zone technique, when do you record the Vertical Dimension (VD)?
Y
Before the clinical stage of the neutral zone impression.
The VD is recorded at the same visit of recording the neutral zone.
The VD is recorded in a separate visit after recording the neutral zone.
The VD is recorded in the Try-in visit.
Which of the following is LEAST likely to cause a traumatic denture ulcer:
Y
ill-fitting denture
bleb of acrylic (positive) on the fitting surface of a new denture
internal acrylic porosity
premature occlusal contact
food entrapment under a denture
short denture flange
a+c
c+f
b+d
e+f
Which of the following is LEAST likely to cause inflammatory papillary hyperplasia:
Y
relief chamber in the maxillary denture
continuous 24-hour wearing of the denture
ill-fitting denture (combination syndrome)
poor occlusion that causes denture base movement
single mandibular denture
Which of the following is LEAST likely to cause epulis fissuratum:
Y
over-extended flanges of new dentures
continual ridge resorption that allows the denture flanges of existing dentures to dig into the buccal/labial vestibule
inadequate border molding
lack of peripheral seal in the maxillary denture
Which of the following statements is inaccurate:
Y
Type I denture stomatitis (candidosis) presents as a localized simple inflammation or pinpoint
hyperemia
Type II denture stomatitis (candidosis) presents as diffuse erythema involving part of all of the
dentrure covered mucosa
Diagnosis of denture stomatitis (candidosis) can be confirmed by direct smear from the denture and
identification of Candida albicans spores
Denture stomatitis (candidosis) often occurs in patients with predisposing factors such as xerostomia
Which of the following statements regarding angular chielitis is FALSE:
Y
moderately painful fissured encrusted lesions at the commissures of the mouth
associated with increased vertical dimension of occlusion
frequently associated with both Candidal and secondary bacterial (Staphylococcal) infection
often associated with underlying immune dysfunction
infection starts under complete denture prosthesis and spreads via saliva to the skin folds at the angles
of the mouth
Diagnosis of the underlying cause of burning mouth syndrome is difficult and frustrating for the doctor
because there are too many clinical signs.
N
TRUE
FALSE
V-shaped palatal vault is often associated with Class III posterior palatal form leading to improved in peripheral seal in maxillary complete dentures.
N
TRUE
FALSE
It is important not to look at a patients previous ill-fitting dentures, because such dentures will cause us to repeat the same errors in the new dentures.
N
TRUE
FALSE
Impressions for rebasing of existing complete dentures are made without using a closed mouth impression technique. In the final rebased dentures, which of the following error is most likely to occur:
Y
premature occlusal contact on the anterior teeth
premature occlusal contact on the right side of the mouth if the operator is left-handed
premature occlusal contact on the right side of the mouth if the operator is right-handed
premature occlusal contact on the posterior teeth
reduced overall vertical dimension of occlusion
Tissue conditioner can be used both (1) as a functional impression material and (2) to allow the soft tissue to heal before permanent relining and rebasing procedures are performed.
N
TRUE
FALSE
Which of the following statements is FALSE regarding relining and rebasing:
Y
Chairside relining involves the use of zinc-oxide eugenol impression paste
A common problem during relining is correct orientation of the dentures during the impression/
relining procedure
Impressions for relining and rebasing are usually performed using closed-mouth impression techniques
Occlusal pivots may be used to re-establish the correct vertical dimension of occlusion after excessive tooth wear and residual ridge resorption
Maxillary complete dentures require relining only slightly more often than mandibular complete
dentures.
N
TRUE
FALSE
Which of the following statements is FALSE regarding relining and rebasing:
Y
Rebasing is a procedure which involves resurfacing the tissue side of a denture with new base
material to make it fit more accurately
Rebasing is a procedure in which the teeth of the existing teeth are retained
Relining is not a useful procedure when a change in vertical dimension of occlusion is necessary
Immediate dentures usually require a reline within one year of extractions
Mandibular dentures often require a reline every 3 5 years
An edentulous patient has residual ridge undercuts. If alveoplasty surgery is performed, it is advisable
to remove only half of the alveolar bone creating the undercut.
N
TRUE
FALSE
Which of the following statements is TRUE regarding preprosthetic surgery in edentulous patients:
a. Autogenous hydroxyapatite can be used to augment and rebuild a resorbed ridge but may result in migration of the particles
b. Autogenous iliac crest block graft is effective in rebuilding resorbed ridges but may limit interocclusal space
c. Autogenous inferior border rib grafts may be used to augment resorbed mandibles, but may interfere with an ideal occlusal plane
d. Autogenous bone may resorb as much as 80 per cent within the first ten years after grafting
Y
A + B + C + D
B + D
A + B + C
A + B + D
A + D
In Mucosal Advancement Vestibuloplasty, the mucosa of the vestibule is used to line one side of the extended vestibule, and the other side heals by growth of a new epithelial surface.
N
TRUE
FALSE
Which of the following statements is TRUE:
a. Palatal tori should always be removed surgically because they interfere with denture retention b. Hyperplastic tuberosities are easy to remove surgically because they consist of healthy
alveolar bone
c. All other treatment options should be tried before surgically removing inflammatory papillary hyperplasia
d. Surgical removal of palatal tori may result in hematoma formation if a surgical stent is not used
Y
A + B
C + D
B + C + D
A + C
B + D
A patient has a single maxillary denture opposing natural lower anterior teeth and a Kennedy Class I
RPD. The patient has flabby resilient tissue in the anterior maxilla. Which of the following treatment
options would provide the best future prognosis.
Remove the flabby resilient tissue surgically
Place a bone graft and implants in the maxillary anterior region
Extract the lower remaining natural teeth
Remake a new maxillary denture using a special impression technique
Perform vestibuloplasty surgery in the maxaillary labial sulcus
Which of the following is NOT an indication for pre-prosthetic surgery
Y
Pendulous maxillary tuberosities
Pressure on the mental nerve/foramen
Epulis fissuratum that does not respond to non-surgical treatment
Type II denture stomatitis
Unfavorable frenum attachment (close to crest of residual ridge)
Which of the following statements is TRUE:
Y
Excessive space under overdentures over the gingival margins of abutment teeth may lead to the
development of dead space which may lead to gingival inflammation and hypertrophy Reducing the tooth height creates an unfavorable crown:root ratio for overdenture abutments
Fortunatley, the exposed dentine of overdenture abutments is naturally resistant to caries
Gold copings that cover overdenture abutments are the most effective means to prevent caries in these
abutments
Which of the following are possible problems associated with overdentures?
a. Reduced inter-arch space for the setting of teeth b. Increased labial fullness of the abutments c. Weakening and fracture of the denture base over the abutment d. Recurrent caries of natural overdenture abutments
N
A+B
A+B+D
All of the above
Regarding overdentures, which of the following is TRUE:
N
Canine abutments are the most commonly used overdenture abutments
Incisor overdenture abutments help restore natural labial fullness
Canine abutments may result in over-contoured labial flanges
A + B
B + C
A + C
A + B + C
The rate of residual ridge resorption is generally greater in the mandibular residual ridge than the
maxillary. How much greater?
Y
2 times greater
3 times greater
4 times greater
5 times greater
The statement is incorrect. The rate of bone resorption in the mandibular residual ridge is the same as
the rate of bone resorption in the maxillary residual ridge
Which of the following clinical situations usually has the poorest prognosis?
N
Maxillary single complete denture opposing full natural mandibular dentition
Maxillary single complete denture opposing mandibular Kennedy Class I RPD
Maxillary single complete denture opposing mandibular Kennedy Class IV RPD
Mandibular single complete denture opposing full natural maxillary dentition
a and b
b an c
Hanau described five factors that affect occlusion in complete dentures. If a patient is to wear a single
complete denture opposing a fully dentate arch and we desire a balanced occlusal scheme, which of the
following factors is it most practical to adjust in the complete denture:
Y
Condylar guidance
Occlusal plane
Cusp height/ angle
Incisal guidance
Compensating curves
When considering the clinical scenario known as Combination (Kellys) Syndrome, all of the following are true EXCEPT:
N
This scenario is most commonly associated with a fully edentulous mandibular arch opposed by a
partially edentulous maxillary arch (Kennedy Class I).
It is helpful to maintain maxillary anterior teeth (even as overdenture abutments) to prevent this
clinical scenario from occurring.
This syndrome results mainly from an imbalance in loading and support between the dentate and
edentulous portions of the opposing arches.
This syndrome is a common clinical scenario when the patient is fully edentulous in both arches.
a and c
a and d
b and d
When considering the material to use for the artificial teeth in a single complete denture opposing
natural dentition, all of the following statements are true EXCEPT:
N
Acrylic resin artificial teeth bond chemically to the polymethyl-methacrylate (PMMA) denture base
and are easy to adjust and reshape.
Although porcelain artificial teeth are difficult to adjust, they have the advantage of causing less wear
(abrasion) to opposing natural teeth than acrylic.
Although cast metal occlusal surfaces can be custom designed to match to opposing natural teeth, the
technique is often expensive and time-consuming.
Amalgam stops are placed in the occlusal surfaces of artificial porcelain teeth to reduce the wear of the porcelain by the natural teeth.
a and c
b and d
If a patient has Combination syndrome it is probable that we will see all of the following EXCEPT: Y
Anterior rotation of the mandible during occlusion (Class III / prognathic relationship)
Papillary hyperplasia of palatal soft tissue
Reduction of the Vertical Dimension of Occlusion
Maxillary anterior residual ridge resorbs and replaced by resilient flabby ridge
Occlusal plane tilts anteroposteriorly: anteriorly upwards and posteriorly downwards
Pendulous overgrowth of the retromolar pads
Epulis Fissuratum in maxillary labial vestibule
According to Monsons Spherical Theory of Occlusion, a number of occlusal landmarks lie on the surface of a 10 cm radius sphere with its center in the region of the glabella. These landmarks include all of
the following EXCEPT:
Y
The labial gingival margins of the mandibular central incisors
The centers of rotation of the mandibular condyles
The cusp tips of the mandibular second molars
Points approximately between the bottom two-thirds and top one-third of the mandibular retromolar
pads
Points approximately at the mesial slope inclines of the mandibular canines
According to Attwood classification of ridges, Class IV is:
Y
Good ridge without extraction.
Immediate post extraction.
Knife edge ridge
Well-rounded ridge form
Negative or concave form.
The most favorable ridge contour for complete denture is:
Y
High ridge with flat crest and parallel sides.
V shaped.
Knife edge.
Flat ridge.
Ridge with multiple specules.
The retromylohyoid distal extension of the lower denture is limited by all of the following except:
Y
Mylohyoid muscle
Ramus
Buccinator.
Pterygo mandibular raphe.
Superior constrictor.
When making the final impression of the lower edentulous arch, the patient is asked to exert a closing
force while the dentist exerts a downward pressure. This is to activate:
Y
The masseter
The Pterygo mandibular raphe
The Pterygo mandibular raphe and the masseter
Medial Pterygoid and the Pterygomandibular raphe.
The masseter and medial pterygoid.
Once a stable and retentive peripheral seal is achieved and appropriate spacing is incorporated, your
choice of the final impression material for complete denture would be:
Y
addition silicone
polyether.
zinc oxide eugenol.
alginate.
secondary importance and dependant on the dentist preference.
. Your impression technique of choice for ridges that equate to Atwood class V and VI is:
Y
Admix
Conventional technique.
Mucostatic impression on the ridge and mucocompressive else where
The final impression is taken with green stick tracing compound. Using the heated spoon-end of a Le Cron carver, the green stick related to the crestal ridge is removed and the related area of the tray is
perforated. Light-body Poly Vinyl Siloxane is injected into the buccal and lingual shelves of the green stick
and the tray is gently inserted in the mouth . This is a description of the impression technique used for : Y
.The fibrous (un-employed) posterior mandibular ridge.
Flabby ridge
Atwwod class V lower ridge.
Immediate dentures.
Neutral Zone technique.
With regard to the Neutral Zone technique, when do you record the Vertical Dimension (VD)?
Y
Before the clinical stage of the neutral zone impression.
The VD is recorded at the same visit of recording the neutral zone.
The VD is recorded in a separate visit after recording the neutral zone.
The VD is recorded in the Try-in visit.
Which of the following is LEAST likely to cause a traumatic denture ulcer:
Y
ill-fitting denture
bleb of acrylic (positive) on the fitting surface of a new denture
premature occlusal contact
food entrapment under a denture
short denture flange
Which of the following is LEAST likely to cause inflammatory papillary hyperplasia:
Y
relief chamber in the maxillary denture
continuous 24-hour wearing of the denture
ill-fitting denture (combination syndrome)
poor occlusion that causes denture base movement
single mandibular denture
Which of the following is LEAST likely to cause epulis fissuratum:
Y
over-extended flanges of new dentures
continual ridge resorption that allows the denture flanges of existing dentures to dig into the buccal/labial vestibule
inadequate border molding
lack of peripher seal in the maxillary denture
Which of the following statements is inaccurate:
Y
Type I denture stomatitis (candidosis) presents as a localized simple inflammation or pinpoint
hyperemia
Type II denture stomatitis (candidosis) presents as diffuse erythema involving part of all of the
dentrure covered mucosa
Diagnosis of denture stomatitis (candidosis) can be confirmed by direct smear from the denture and
identification of Candida albicans spores
Denture stomatitis (candidosis) often occurs in patients with predisposing factors such as xerostomia
Which of the following statement regarding angular chielitis is FALSE:
Y
moderately painful fissured encrusted lesions at the commissures of the mouth
associated with increased vertical dimension of occlusion
frequently associated with both Candidal and secondary bacterial (Staphylococcal) infection
often associated with underlying immune dysfunction
infection starts under complete denture prosthesis and spreads via saliva to the skin folds at the angles
of the mouth
All of the following are part of the routine management of denture stomatitis (candidosis), EXCEPT:
Y
correct ill-fitting dentures or fabricate new ones
improve oral and denture hygiene
antifungal therapy
complete surgical excision of infected mucosa
Diagnosis of the underlying cause of burning mouth syndrome is difficult and frustrating for the doctor
because there are too many clinical signs.
N
TRUE
FALSE
Burning mouth syndrome is most common in middle-aged females
N
TRUE
FALSE
V-shaped palatal vault is often associated with Class III posterior palatal form leading to improved in peripheral seal in maxillary complete dentures.
N
TRUE
FALSE
Accordin/g to Houses classification of mental attitude, a Skeptical patient is a patient who seeks treatment because a friend or relative has encouraged them to do so.
N
TRUE
FALSE
It is often more difficult to set complete denture teeth for patients who have had recent extractions than
patients who have been edentulous for several years
N
TRUE
FALSE
It is important not to look at a patients previous ill-fitting dentures, because such dentures will cause us to repeat the same errors in the new dentures.
N
TRUE
FALSE
Impressions for rebasing of existing complete dentures are made without using a closed mouth impression technique. In the final rebased dentures, which of the following error is most likely to occur:
Y
premature occlusal contact on the anterior teeth
premature occlusal contact on the right side of the mouth if the operator is left-handed
premature occlusal contact on the right side of the mouth if the operator is right-handed
premature occlusal contact on the posterior teeth
reduced overall vertical dimension of occlusion
Tissue conditioner can be used both (1) as a functional impression material and (2) to allow the soft tissue to heal before permanent relining and rebasing procedures are performed.
N
TRUE
FALSE
Which of the following statements is FALSE regarding relining and rebasing:
Y
Chairside relining involves the use of zinc-oxide eugenol impression paste
A common problem during relining is correct orientation of the dentures during the impression/
relining procedure
Impressions for relining and rebasing are usually performed using closed-mouth impression techniques
Occlusal pivots may be used to re-establish the correct vertical dimension of occlusion after excessive tooth wear and residual ridge resorption
Maxillary complete dentures require relining only slightly more often than mandibular complete
dentures.
N
TRUE
FALSE
Which of the following statements is FALSE regarding relining and rebasing:
Y
Rebasing is a procedure which involves resurfacing the tissue side of a denture with new base
material to make it fit more accurately
Rebasing is a procedure in which the teeth of the existing teeth are retained
Relining is not a useful procedure when a change in vertical dimension of occlusion is necessary
Immediate dentures usually require a reline within one year of extractions
Mandibular dentures often require a reline every 3 5 years
An edentulous patient has residual ridge undercuts. If alveoplasty surgery is performed, it is advisable
to remove only half of the alveolar bone creating the undercut.
N
TRUE
FALSE
Which of the following statements is TRUE regarding preprosthetic surgery in edentulous patients:
e. Autogenous hydroxyapatite can be used to augment and rebuild a resorbed ridge but may result in migration of the particles
f. Autogenous iliac crest block graft is effective in rebuilding resorbed ridges but may limit interocclusal space
g. Autogenous inferior border rib grafts may be used to augment resorbed mandibles, but may interfere with an ideal occlusal plane
h. Autogenous bone may resorb as much as 80 per cent within the first ten years after grafting
Y
A + B + C + D
B + D
A + B + C
A + B + D
A + D
In Mucosal Advancement Vestibuloplasty, the mucosa of the vestibule is used to line one side of the extended vestibule, and the other side heals by growth of a new epithelial surface.
N
TRUE
FALSE
Which of the following statements is TRUE:
e. Palatal tori should always be removed surgically because they interfere with denture retention f. Hyperplastic tuberosities are easy to remove surgically because they consist of healthy
alveolar bone
g. All other treatment options should be tried before surgically removing inflammatory papillary hyperplasia
h. Surgical removal of palatal tori may result in hematoma formation if a surgical stent is not used
Y
A + B
C + D
B + C + D
A + C
B + D
A patient has a single maxillary denture opposing natural lower anterior teeth and a Kennedy Class I
RPD. The patient has flabby resilient tissue in the anterior maxilla. Which of the following treatment
options would provide the best future prognosis.
Remove the flabby resilient tissue surgically
Place a bone graft and implants in the maxillary anterior region
Extract the lower remaining natural teeth
Remake a new maxillary denture using a special impression technique
Perform vestibuloplasty surgery in the maxaillary labial sulcus
Which of the following is NOT an indication for pre-prosthetic surgery
Y
Pendulous maxillary tuberosities
Pressure on the mental nerve/foramen
Epulis fissuratum that does not respond to non-surgical treatment
Type II denture stomatitis
Unfavorable frenum attachment (close to crest of residual ridge)
Which of the following statements is TRUE:
Y
Excessive space under overdentures over the gingival margins of abutment teeth may lead to the
development of dead space which may lead to gingival inflammation and hypertrophy Reducing the tooth height creates an unfavorable crown:root ratio for overdenture abutments
Fortunatley, the exposed dentine of overdenture abutments is naturally resistant to caries
Gold copings that cover overdenture abutments are the most effective means to prevent caries in these
abutments
Which of the following is TRUE regarding natural overdenture abutment without attachments?
e. Overdenture abutments should passively contact the denture during rest f. Overdenture abutments should contact the denture only during function g. The height of the abutment should be at the level of the gingiva h. The root canal should always be endodontically treated
N
A+B
B+C
A+C
A+B+C
All of the above
Which of the following are possible problems associated with overdentures?
e. Reduced inter-arch space for the setting of teeth f. Increased labial fullness of the abutments g. Weakening and fracture of the denture base over the abutment h. Recurrent caries of natural overdenture abutments
N
A+B
A+B+D
All of the above
Regarding overdentures, which of the following is TRUE:
N
Canine abutments are the most commonly used overdenture abutments
Incisor overdenture abutments help restore natural labial fullness
Canine abutments may result in over-contoured labial flanges
A + B
B + C
A + C
A + B + C
Overdenture abutments are favorable for all of the following reasons, EXCEPT:
Y
They reduce residual ridge resorption
They provide the patient with improved proprioceptive feedback during mastication
They provide the psychological advantage of natural feeling for the patient They always provide additional retention for the overdenture
They provide improved support for the overdenture
None of the other choices (above and below)
In which of the following situations is it ethically acceptable to cheat on a Prosthodontics
examination?
N
If the instructor is busy answering another student's question or talking on his mobile phone
If your grades are low and you are afraid of failing
If you can see your neighbor's computer screen clearly
If you didnt study because you thought the exam would be postponed due to snow If the pretty/handsome student next to you smiles at you and asks for help
If you are at the top of your class and you are afraid of dropping to second
If you are second in your class and you want to become first
If you didn't feel like studying last night and watched television instead
None of the above
**4When considering the clinical scenario known as Combination (Kellys) Syndrome, all of the following are true EXCEPT: N
This scenario is most commonly associated with a fully edentulous mandibular arch
opposed by a partially edentulous maxillary arch (Kennedy Class I).
It is helpful to maintain maxillary anterior teeth (even as overdenture abutments) to
prevent this clinical scenario from occurring.
This syndrome results mainly from an imbalance in loading and support between the
dentate and edentulous portions of the opposing arches.
This syndrome is a common clinical scenario when the patient is fully edentulous in
both arches.
a and c
a and d
b and d
*10The retromylohyoid distal extension of the lower denture is limited by all of the
following except:
Y
Mylohyoid muscle
Ramus
Buccinator.
Pterygo mandibular raphe.
Superior constrictor.
43Overdenture abutments are favorable for all of the following reasons, EXCEPT:
Y
They reduce residual ridge resorption
They provide the patient with improved proprioceptive feedback during mastication
They provide the psychological advantage of natural feeling for the patient They always provide additional retention for the overdenture
They provide improved support for the overdenture
None of the other choices (above and below)
40Which of the following is TRUE regarding natural overdenture abutment without
attachments?
i. Overdenture abutments should passively contact the denture during rest j. Overdenture abutments should contact the denture only during function k. The height of the abutment should be at the level of the gingiva l. The root canal should always be endodontically treated
N
A+B
B+C
A+C
A+B+C
All of the above
1The rate of residual ridge resorption is generally greater in the mandibular residual
ridge than the maxillary. How much greater?
Y
2 times greater
3 times greater
4 times greater
5 times greater
The statement is incorrect. The rate of bone resorption in the mandibular residual
ridge is the same as the rate of bone resorption in the maxillary residual ridge
2Which of the following clinical situations usually has the poorest prognosis?
N
Maxillary single complete denture opposing full natural mandibular dentition
Maxillary single complete denture opposing mandibular Kennedy Class I RPD
Maxillary single complete denture opposing mandibular Kennedy Class IV RPD
Mandibular single complete denture opposing full natural maxillary dentition
a and b
b an c
3Hanau described five factors that affect occlusion in complete dentures. If a patient
is to wear a single complete denture opposing a fully dentate arch and we desire a
balanced occlusal scheme, which of the following factors is it most practical to adjust in
the complete denture:
Y
Condylar guidance
Occlusal plane
Cusp height/ angle
Incisal guidance
Compensating curves
5When considering the material to use for the artificial teeth in a single complete
denture opposing natural dentition, all of the following statements are true EXCEPT:
N
Acrylic resin artificial teeth bond chemically to the polymethyl-methacrylate
(PMMA) denture base and are easy to adjust and reshape.
Although porcelain artificial teeth are difficult to adjust, they have the advantage of
causing less wear (abrasion) to opposing natural teeth than acrylic.
Although cast metal occlusal surfaces can be custom designed to match to opposing
natural teeth, the technique is often expensive and time-consuming.
Amalgam stops are placed in the occlusal surfaces of artificial porcelain teeth to reduce the wear of the porcelain by the natural teeth.
a and c
b and d
6If a patient has Combination syndrome it is probable that we will see all of the following EXCEPT:
Y
Anterior rotation of the mandible during occlusion (Class III / prognathic
relationship)
Papillary hyperplasia of palatal soft tissue
Reduction of the Vertical Dimension of Occlusion
Maxillary anterior residual ridge resorbs and replaced by resilient flabby ridge
Occlusal plane tilts anteroposteriorly: anteriorly upwards and posteriorly downwards
Pendulous overgrowth of the retromolar pads
Epulis Fissuratum in maxillary labial vestibule
7According to Monsons Spherical Theory of Occlusion, a number of occlusal landmarks lie on the surface of a 10 cm radius sphere with its center in the region of the
glabella. These landmarks include all of the following EXCEPT:
Y
The labial gingival margins of the mandibular central incisors
The centers of rotation of the mandibular condyles
The cusp tips of the mandibular second molars
Points approximately between the bottom two-thirds and top one-third of the
mandibular retromolar pads
Points approximately at the mesial slope inclines of the mandibular canines
8According to Attwood classification of ridges, Class IV is:
Y
Good ridge without extraction.
Immediate post extraction.
Knife edge ridge
Well-rounded ridge form
Negative or concave form.
9The most favorable ridge contour for complete denture is:
Y
High ridge with flat crest and parallel sides.
V shaped.
Knife edge.
Flat ridge.
Ridge with multiple specules.
11When making the final impression of the lower edentulous arch, the patient is
asked to exert a closing force while the dentist exerts a downward pressure. This is to
activate:
Y
The masseter
The Pterygo mandibular raphe
The Pterygo mandibular raphe and the masseter
Medial Pterygoid and the Pterygomandibular raphe.
The masseter and medial pterygoid.
12Once a stable and retentive peripheral seal is achieved and appropriate spacing is
incorporated, your choice of the final impression material for complete denture would be:
Y
addition silicone
polyether.
zinc oxide eugenol.
alginate.
secondary importance and dependant on the dentist preference.
13. Your impression technique of choice for ridges that equate to Atwood class V
and VI is:
Y
Admix
Conventional technique.
Mucostatic impression on the ridge and mucocompressive else where
14The final impression is taken with green stick tracing compound. Using the heated spoon-end of a Le Cron carver, the green stick related to the crestal ridge is
removed and the related area of the tray is perforated. Light-body Poly Vinyl Siloxane is
injected into the buccal and lingual shelves of the green stick and the tray is gently
inserted in the mouth . This is a description of the impression technique used for : Y
.The fibrous (un-employed) posterior mandibular ridge.
Flabby ridge
Atwwod class V lower ridge.
Immediate dentures.
Neutral Zone technique.
15With regard to the Neutral Zone technique, when do you record the Vertical
Dimension (VD)?
Y
Before the clinical stage of the neutral zone impression.
The VD is recorded at the same visit of recording the neutral zone.
The VD is recorded in a separate visit after recording the neutral zone.
The VD is recorded in the Try-in visit.
16Which of the following is LEAST likely to cause a traumatic denture ulcer:
Y
ill-fitting denture
bleb of acrylic (positive) on the fitting surface of a new denture
premature occlusal contact
food entrapment under a denture
short denture flange
17Which of the following is LEAST likely to cause inflammatory papillary
hyperplasia:
Y
relief chamber in the maxillary denture
continuous 24-hour wearing of the denture
ill-fitting denture (combination syndrome)
poor occlusion that causes denture base movement
single mandibular denture
18Which of the following is LEAST likely to cause epulis fissuratum:
Y
over-extended flanges of new dentures
continual ridge resorption that allows the denture flanges of existing dentures to dig into the buccal/labial vestibule inadequate border molding
lack of peripher seal in the maxillary denture
19Which of the following statements is inaccurate:
Y
Type I denture stomatitis (candidosis) presents as a localized simple inflammation or
pinpoint hyperemia
Type II denture stomatitis (candidosis) presents as diffuse erythema involving part
of all of the dentrure covered mucosa
Diagnosis of denture stomatitis (candidosis) can be confirmed by direct smear from
the denture and identification of Candida albicans spores
Denture stomatitis (candidosis) often occurs in patients with predisposing factors
such as xerostomia
20Which of the following statement regarding angular chielitis is FALSE:
Y
moderately painful fissured encrusted lesions at the commissures of the mouth
associated with increased vertical dimension of occlusion
frequently associated with both Candidal and secondary bacterial (Staphylococcal)
infection
often associated with underlying immune dysfunction
infection starts under complete denture prosthesis and spreads via saliva to the skin
folds at the angles of the mouth
21All of the following are part of the routine management of denture stomatitis
(candidosis), EXCEPT:
Y
correct ill-fitting dentures or fabricate new ones
improve oral and denture hygiene
antifungal therapy
complete surgical excision of infected mucosa
22Diagnosis of the underlying cause of burning mouth syndrome is difficult and
frustrating for the doctor because there are too many clinical signs.
N
TRUE
FALSE
23Burning mouth syndrome is most common in middle-aged females
N
TRUE
FALSE
24V-shaped palatal vault is often associated with Class III posterior palatal form leading to improved in peripheral seal in maxillary complete dentures.
N
TRUE
FALSE
25According to Houses classification of mental attitude, a Skeptical patient is a patient who seeks treatment because a friend or relative has encouraged them to do so.
N
TRUE
FALSE
26It is often more difficult to set complete denture teeth for patients who have had
recent extractions than patients who have been edentulous for several years
N
TRUE
FALSE
27It is important not to look at a patients previous ill-fitting dentures, because such dentures will cause us to repeat the same errors in the new dentures.
N
TRUE
FALSE
28Impressions for rebasing of existing complete dentures are made without using a
closed mouth impression technique. In the final rebased dentures, which of the following error is most likely to occur:
Y
premature occlusal contact on the anterior teeth
premature occlusal contact on the right side of the mouth if the operator is left-
handed
premature occlusal contact on the right side of the mouth if the operator is right-
handed
premature occlusal contact on the posterior teeth
reduced overall vertical dimension of occlusion
29Tissue conditioner can be used both (1) as a functional impression material and (2) to allow the soft tissue to heal before permanent relining and rebasing procedures are
performed.
N
TRUE
FALSE
30 Which of the following statements is FALSE regarding relining and rebasing:
Y
Chairside relining involves the use of zinc-oxide eugenol impression paste
A common problem during relining is correct orientation of the dentures during the
impression/ relining procedure
Impressions for relining and rebasing are usually performed using closed-mouth impression techniques
Occlusal pivots may be used to re-establish the correct vertical dimension of occlusion after excessive tooth wear and residual ridge resorption
31Maxillary complete dentures require relining only slightly more often than
mandibular complete dentures.
N
TRUE
FALSE
32Which of the following statements is FALSE regarding relining and rebasing:
Y
Rebasing is a procedure which involves resurfacing the tissue side of a denture with
new base material to make it fit more accurately
Rebasing is a procedure in which the teeth of the existing teeth are retained
Relining is not a useful procedure when a change in vertical dimension of occlusion
is necessary
Immediate dentures usually require a reline within one year of extractions
Mandibular dentures often require a reline every 3 5 years
33An edentulous patient has residual ridge undercuts. If alveoplasty surgery is
performed, it is advisable to remove only half of the alveolar bone creating the undercut.
N
TRUE
FALSE
34Which of the following statements is TRUE regarding preprosthetic surgery in
edentulous patients:
i. Autogenous hydroxyapatite can be used to augment and rebuild a resorbed ridge but may result in migration of the particles
j. Autogenous iliac crest block graft is effective in rebuilding resorbed ridges but may limit interocclusal space
k. Autogenous inferior border rib grafts may be used to augment resorbed mandibles, but may interfere with an ideal occlusal plane
l. Autogenous bone may resorb as much as 80 per cent within the first ten years after grafting
Y
A + B + C + D
B + D
A + B + C
A + B + D
A + D
35In Mucosal Advancement Vestibuloplasty, the mucosa of the vestibule is used to line one side of the extended vestibule, and the other side heals by growth of a new
epithelial surface.
N
TRUE
FALSE
36Which of the following statements is TRUE:
i. Palatal tori should always be removed surgically because they interfere with denture retention
j. Hyperplastic tuberosities are easy to remove surgically because they consist of healthy alveolar bone
k. All other treatment options should be tried before surgically removing inflammatory papillary hyperplasia
l. Surgical removal of palatal tori may result in hematoma formation if a surgical stent is not used
Y
A + B
C + D
B + C + D
A + C
B + D
37A patient has a single maxillary denture opposing natural lower anterior teeth and
a Kennedy Class I RPD. The patient has flabby resilient tissue in the anterior maxilla.
Which of the following treatment options would provide the best future prognosis.
Remove the flabby resilient tissue surgically
Place a bone graft and implants in the maxillary anterior region
Extract the lower remaining natural teeth
Remake a new maxillary denture using a special impression technique
Perform vestibuloplasty surgery in the maxaillary labial sulcus
38Which of the following is NOT an indication for pre-prosthetic surgery
Y
Pendulous maxillary tuberosities
Pressure on the mental nerve/foramen
Epulis fissuratum that does not respond to non-surgical treatment
Type II denture stomatitis
Unfavorable frenum attachment (close to crest of residual ridge)
39Which of the following statements is TRUE:
Y
Excessive space under overdentures over the gingival margins of abutment teeth
may lead to the development of dead space which may lead to gingival inflammation and hypertrophy
Reducing the tooth height creates an unfavorable crown:root ratio for overdenture
abutments
Fortunatley, the exposed dentine of overdenture abutments is naturally resistant to
caries
Gold copings that cover overdenture abutments are the most effective means to
prevent caries in these abutments
41Which of the following are possible problems associated with overdentures?
i. Reduced inter-arch space for the setting of teeth j. Increased labial fullness of the abutments k. Weakening and fracture of the denture base over the abutment l. Recurrent caries of natural overdenture abutments
N
A+B
A+B+D
All of the above
42Regarding overdentures, which of the following is TRUE:
N
Canine abutments are the most commonly used overdenture abutments
Incisor overdenture abutments help restore natural labial fullness
Canine abutments may result in over-contoured labial flanges
A + B
B + C
A + C
A + B + C
44In which of the following situations is it ethically acceptable to cheat on a
Prosthodontics examination?
N
If the instructor is busy answering another student's question or talking on his
mobile phone
If your grades are low and you are afraid of failing
If you can see your neighbor's computer screen clearly
If you didnt study because you thought the exam would be postponed due to snow If the pretty/handsome student next to you smiles at you and asks for help
If you are at the top of your class and you are afraid of dropping to second
If you are second in your class and you want to become first
If you didn't feel like studying last night and watched television instead
None of the above
1. Complete denture impression technique selective pressure technique. When using a selective pressure technique for complete denture impressions, what areas of the edentulous mouth require more pressure? a) Residual ridges b) Buccal shelf c) Border seal (posterior palatal seal area) d) a, b, c e) b and c only 2. Combination syndrome, Kellys syndrome which consists of all of the following except:
a) Loss of bone from the anterior part of the maxillary ridge b) Downgrowth of the maxillary tuberosities c) Candidiasis infection of the tissues of the hard palate d) Extrusion of the lower anterior teeth e) Loss of bone beneath the removable partial denture bases
3. Occlusal schemes for complete dentures. Which of the following statements concerning lingualized occlusion for complete dentures is correct? 1. Results in placement of the mandibular teeth lingual to the ridge crests. 2. Uses anatomical teeth for the maxillary denture and modified or semi anatomical teeth for the mandibular denture. 3. Concentrates forces of occlusion on lingual cusps of the upper posterior teeth and vertical forces centralized on mandibular teeth. 4. Contraindicated for patients with flat ridges, which are unable to resist lateral forces. (Although it can be used to reduce lat. forces)
a. 1, 2, 3 b. 2, 3, 4 (4 is not totally ok!!) c. 1, 3, 4 d. All of the above
4. While observing lateral excursions in your denture patient, the maxillary denture dislodges, but adequate flanges and borders are present. You would
a. check and adjust the labial frenum area b. check and adjust the buccal frenum area c. restart the case and have the teeth reset more lingually d. increase the thickness of the post-dam area e. check the distobuccal flanges for coronoid process impingement
5. After processing full upper and lower dentures with cusped teeth, selective grinding must be done to correct occlusal errors from fabrication procedures. What is the correct sequence of grinding?
a. protrusive, centric, balancing, working b. centric, protrusive, balancing, working c. centric, working, balancing, protrusive d. centric, balancing, working, protrusive e. centric, working, protrusive, balancing
6. Which of the following muscles aid in the retention and stabilization of complete dentures?
1. masseters 2. buccinators 3. mylohyoids 4. medial pterygoids 5. orbicularis oris
a. 1,2,4 b. 2,3,4 c. 1,3,5 d. 2,5 e. 2,3,5
7. Which of the following is the MOST important factor when making a
record of centric relation for complete dentures?
a. the patient should be in a reclined position b. accurate and stable recording bases should be used c. central bearing plates and a tracing device should be used d. the patient should be allowed to close in his accustomed position when a
wax registration is used e. the patient should not be allowed to wear their dentures for 24 hours
prior to recording centric relation
8. Gagging at denture insertion may be caused by 1. overextension of the posterior border of the maxillary denture. 2. overextension of the distal lingual flange of the mandibular denture. 3. an excessively thick posterior border of the maxillary denture. 4. a decreased vertical dimension in the final denture.
a. 1,2 b. 1,2,3 c. 2,3,4 d. 3,4 e. all of the above
9. When constructing complete dentures, which of the following factors is determined solely by the patients anatomical characteristic?
1. incisal guidance 2. centric relation 3. the compensating curve 4. orientation of the occlusal plane 5. condylar guidance
a. 1,3,5 b. 1,2,5 c. 2,4,5 d. 2,5 e. 2,3,5
10. The most reliable landmark for determining the posterior height of the occlusal plane is a point
a. 4mm below the parotid duct b. 2mm above the resting height of the tongue c. midway between the tuberosity of the maxilla and the retromolar pad d. at the middle of the retromolar pad (2/3 of retromolar pad) e. 3mm above the crest of the ridge
11. The infraorbital pointer is used for transferring: a. midline shift b. hinge-axis relation c. occlusal plane position (in relation to hinge of axis) d. radius of condyle reference point
e. horizontal condylar inclination
12. When viewed from the sagittal plane, what angle is formed between the protrusive and balancing condylar paths?
a. Christensens b. Bonwills c. Fischers d. Bennetts e. Wilsons
Regarding the denture base in tooth-borne partial dentures:
Y
The length of the saddle area could affect the type of it
Short span bases are usually metal especially in the anterior region
Limited inter-arch space usually indicate mesh form bases
Anticipated loss of teeth could affect the type of metal used for it
Generally, metal bases are contra-indicated
Which of the following alloys could be used in metal-base RPD:
Y
Co-Cr alloys with 60% chromium
Co-Cr alloys with 40% chromium
Yellow gold alloys (ADA type III)
Low gold alloys with less than 85% gold and platinum
None of other choices
Base metal alloys are better than gold alloys in the following/s:
Y
Density
Elongation
Tensile strength
Yield strength
Hardness
If you need to add a clasp/s made from wrought alloys to metal-based RPD:
Y
You should add it to the acrylic part of the denture
They are usually made from Co-Cr alloys
It is usually soldered to the closest part of the metal base
They are made with a gauge from 18-22
None of other choices
Regarding special trays for metal-base RPDs:
Y
All special trays are spaced with a proper wax to give room for the impression materials
They should have handles
They should be perforated for alginate impression materials
They are made from acrylic resin
All of other choices
Regarding altered cast impressions:
Y
They are essential in every class I or II Kennedy classification
They are made after metal try-in with a full arch special tray
They are usually made with alginate impression material
They require full border moulding for the available tray
None of other choices
Regarding altered cast technique:
Y
The impression should be made with finger pressure on the saddle areas
You need to stabilise the framework with an anterior third point of reference for seating the tray
You need to cut the original cast at the external finish line border
You need a partial tray with 1 mm wax spacer
None of other choices
When you compare Applegate technique to relining RPDs:
Y
Applegate technique is less demanding
Relining is better to keep the original jaw registration
Relining is less accurate than Applegate technique
Both will produce an occlusal discrepancy
None of other choices
Regarding metal base RPDs try-in stage:
Y
Mandibular major connector must be polished on the fitting surface
It must have complete and stable seating on the master cast
Relief areas must be visible where indicated
The occlusal interferences is usually coming from an occlusal rest at the marginal ridge
All of other choices
Your patient has no lower posterior teeth. You have tried in the framework and are border molding the extension areas in preparation for an altered cast impression. The distolingual border molding is shaped by the?
Masseter muscle
Internal pterygoid muscle
Superior constrictor muscle
Mylohyoid muscle
The external finish line is
The external junction of framework metal and denture base plastic.
The external junction of framework metal and supporting tissues.
The external junction of the framework metal and the natural teeth.
The external junction of the natural teeth and the denture base plastic
1. The aesthetics of complete denture started in the stage of: a. Selection of teeth b. Setting of teeth c. Finished denture d. Final/Secondary Impression stage e. A and B
2. Artificial teeth are best selected from: a. Shape of the face b. Shape of the arch c. Age of the patient d. Pre-extraction records e. All of the above
3. The most important factor in the arrangement of teeth is: a. Aesthetics b. Leverage c. Occlusion d. Occlusal plane e. None of the above
4. Overbite is : a. The maximum horizontal overlap between the upper and lower anterior teeth b. 0.5-1.0 mm in the dentate patients c. Determined by the incisal/anterior guidance d. Helpful in denture stability e. Affecting the cusp angles
5. Regarding the distal extension of your upper complete denture: a. Ah/vibrating line is the functional border b. Can be determined at any stage following the primary impression
c. It ends in a the hard palate movable structures d. The distal area is the Postpalatal seal area only e. Essential for denture retention
6. Regarding the cusp angle for posterior acrylic teeth: a. The steeper the angle, the steeper the compensating curves b. It is formed by the cusp slopes of the functional cusp and the occlusal plane c. Indicated always to be efficient in chewing d. Essentially requires semi-adjustable articulators and face-bow record e. None of the above
7. Regarding teeth position in a complete denture: a. The lower anterior teeth are just on the crest of the ridge b. The upper posterior teeth are occluding over a line passing by the buccal shelf and
the Retromolar pad
c. The upper anterior teeth position is determined by the smile line, canine lines and visibility
d. The lower posterior teeth are centred over the crest of the upper posterior alveolar ridge
e. The lower posterior teeth are just inferior to the level of the lateral side of the tongue
8. Regarding compensating curves in a complete denture: a. They are not a factor in aesthetics b. Curve of monson is convex upward in the lower second molar area c. The lateral curves are important to keep teeth contacts in the orbital condyle
side
d. They can be produced in a monoplane articulator e. They are efficient in reducing the Bennett movement of the working condyle
9. Regarding the shape of the curve of the labial surfaces of the six anterior teeth when viewed occlusally in complete dentures:
a. Affected by the shape of the underlying alveolar ridge b. Not affected by the width of the sulcus c. Affected by the shape of the occlusal rim as carved in the registration stage d. Narrower in the V-shaped arches e. A+C+D
10. Regarding setting teeth for complete denture using plane-line articulator: a. It results in a balanced occlusion b. Usually indicated in the well formed ridges c. It results in cuspal interference which causes instability d. It reduces the trauma in atrophic ridges
e. C+D
11. In a balanced occlusion: a. You need at least an average-value articulator b. During protrusion, there must be a vertical drop less than the overbite c. Christensens phenomenon is essential in producing balanced occlusion d. The Condylar guidance is an important factor in a balanced occlusion which can
be controlled by the dentist to a certain extent
e. The compensating curves and cuspal angles could be used alternatively or synergistically in a balanced occlusion
12. Regarding phonetics in complete denture patients: a. Phonetics is important in registering the retruded contact position b. The closest speech space is considerably affected by the free-way space c. S and Z sounds are essential to check the labio-dental relation d. M,P and B sounds are affected by the occlusal vertical dimension e. B+D
13. Regarding the height of the occlusal plane: a. It is not important for upper denture stability b. The higher the occlusal plane, the longer the lower anterior teeth c. The higher the occlusal plane, the greater the distal directing lower forces d. This plane is affecting the occlusal vertical dimension e. All of the above
14. During the trial stage, you need to check the aesthetics: a. The incisal third of the lower teeth will show in smiling patient b. The vermilion border should be obvious only in the young patients c. There should be no oro-facial wrinkles when the dentures inserted d. The midline should coincide with the smile midline e. The visibility must be 2-3 mm
15. Regarding the Postpalatal seal area: a. It is bounded anteriorly by the maxillary tuborosity b. It is determined by the vibrating line posteriorly c. It is usually posterior to the fovea palatini d. It crosses the midpalatal raphe and the middle of the hamular notches e. B+C
16. Regarding this diagram: a. This is the classification of the vibrating lines b. In class A, you need a narrow postdam c. This movement result from saying (H) d. Essential to check in the secondary impression stage e. B+D
17. For denture cleaning, all are correct except: a. 10% Sodium hypochlorite is the material of choice for disinfection b. Hot water could cause warpage c. Water filled hand basin is indicated during cleaning d. It should be cleaned after each meal e. None of the above
18. Regarding the retromolar pad and occlusion of a complete denture:
a. It is important in determining teeth position b. The occlusal plane is just above the level of it c. The lower denture edge should cover 1/2-2/3 of it d. A+C e. None of the above
19. Regarding functional cusps in acrylic teeth: a. They are the palatal/lingual cusps b. They are the buccal cusps c. They are making centric stops in protrusion d. They are the palatal cusps only when you use lingualised occlusion teeth e. None of the above
20. Regarding the anatomical landmarks in setting teeth in a complete denture: a. A line bisecting the incisive papilla is bisecting the canines as well b. A line passes by the incisive papilla distally is 10 mm from the incisal edge c. A line bisecting the retromolar pad should pass over the lower crest d. The buccal cusps of the upper posterior teeth should be centred over the crest of
the lower ridge
e. None of the above
21. The width of the anterior teeth was 52 mm, then the distance from the midline to the canine line is:
a. 20mm-21mm b. 21mm-22mm c. 25mm-26mm d. 24mm-25mm e. None of the above
22. Regarding the selection of the shape of anterior teeth for complete denture: a. It usually follows the shape of the lower arch b. It usually follows the shape of the upper alveolar ridge according to Williams
classification
c. It usually follows the shape of the head as you look from the front d. It usually follows the reversed shape of the face
Q.16
e. It is mainly for the lateral and central incisors
23. In choosing a posterior acrylic tooth for your patients, you do not consider: a. The form of the ridge b. The type of the articulator c. The type of the occlusion d. The type of the material from which the tooth is made e. None of the above
24. The length of your anterior acrylic tooth could not be affected by: a. Mobility of the upper lip b. The visibility on smiling c. The visibility at rest d. The height of an occlusion e. None of the above
25. Regarding the shade selection of your acrylic teeth: a. It is a team work b. The maxillary centrals are the lightest teeth c. Teeth darken as you go posteriorly d. Teeth darken with age e. All of the above
26. The following materials could be used for your anterior teeth except: a. Porcelain b. Metal Onlay c. Resin composite d. Acrylic e. All of the above
27. Regarding the semi-adjustable articulators: a. All of them are ARCON type articulator b. They are essential to produce maximum intercuspation c. They are class II articulators d. They accept face-bow records e. They can receive pantograph records
28. The occlusal requirements for complete denture patients are: a. Maximum incisal guidance b. Maximum intercuspation c. Availability of cusp width d. Absence of deflective contacts e. 10 degree Condylar guidance
29. Regarding Hanua Quint: a. The condylar guidance is adjustable
b. The incisal guidance is determined by checking the speech c. The cusp height is mostly judged by the clinician d. The occlusal plane is always predetermined e. The compensating curves are optional
30. Regarding mounting the upper cast on an articulator: a. You need always a face-bow b. You need always a remounting jig c. The occlusal plane is usually between the horizontal and 100 degree with the
horizon
d. Mounting usually performed with a dental stone e. The incisal pin should be out of touch with the incisal table
The function of the proximal plate is to:
N
Help establish a definitive path of insertion/dislodgement.
Stabilize the RPD by controlling its horizontal position.
Provide contact with the adjacent tooth.
A and C
All of the above
A wrought wire clasp is NOT used in which of the following situations:
N
As an embrasure clasp
On a terminal abutment of an extension RPD.
On a tooth with an indirect retainer on it.
Both 1 and 2 above.
All of the above
Reciprocation between bracing and retentive components requires:
N
I-bars be used
Bracing components contact after retentive components
Correct timing of contact during seating and removal of the RPD
Both a and c
All of the above
Infrabulge clasps originate:
Y
Above the height of contour
Below the height of contour
Above the 0.01" undercut
Above the occlusal surfaces of most premolars
None of other choices
A clasp assembly should:
N
Have a retentive arm with adequate length and taper for flexibility
Have a retentive arm that terminates in an undercut
Have elements that considered together, provide 180 degree encirclement
A and B
All of other choices
The presence of mandibular lingual tori would indicate the need for:
Y
Metal base
Lingual plating
Tube teeth
Extra indirect retainers
None of other choices
In the design process for tooth-borne partial dentures:
N
c. Modified palatal plate is usually indicated
c. Adequate tissue relief is required for lower major connectors
c+. The anticipated loss of teeth could affect the choice of your major connector
c. 2-3mm from the lingual gingival is the minimal requirement for lower major connectors
c. B+C+D
When you select the clasps for tooth-borne RPDs, you need to consider the following except:
Y
The expected required support for your RPD
The coverage of both dental and gingival tissues
The periodontal status of the abutment teeth
The patient preference
The presence of previous RPDs
The following clasps are commonly used for tooth-borne RPD except:
Y
Cast combination clasps which provide bilateral bracing
Cast reciprocal arm and wrought retentive arm
T-clasps are common for aesthetic reasons
Hair pin clasps
. All of other choices
Regarding the denture base in tooth-borne partial dentures:
Y
The length of the saddle area could affect the type of it
Short span bases are usually metal especially in the anterior region
Limited inter-arch space usually indicate mesh form bases
Anticipated loss of teeth could affect the type of metal used for it
Generally, metal bases are contra-indicated
For designing RPD in distal extension bases:
Y
You need to evaluate the dento-alveoalar support potential only
The potential load from different forces is usually destructive
You need to assess the history of previous RPD
Acrylic partial dentures are good alternatives
None of other choices
The movement of extension base away from the ridge could be counteracted by:
Y
Direct retainers
Indirect retainers
Minor connectors
Gravity
All of other choices
The Mediolateral movements in distal extension bases are counteracted by:
Y
Denture bases
Mandibular major connectors
Roach clasps
Clasp retentive components
The artificial teeth
The most important factor/s in determining the success of bilateral free-end saddles lower RPD is:
Y
Maximum tissue coverage
RPI system
Using wrought alloys for the clasps
Altered cast technique
All of other choices
The block out used for maintaining a space for the acrylic resin in Co-Cr RPD is:
Y
Paralleled block-out
Shaped block-out
Arbitrary block-out
Relief block-out
None of other choices
Which of the following alloys could be used in metal-base RPD:
Y
Co-Cr alloys with 60% chromium
Co-Cr alloys with 40% chromium
Yellow gold alloys (ADA type III)
Low gold alloys with less than 85% gold and platinum
None of other choices
Base metal alloys are better than gold alloys in the following/s:
Y
Density
Elongation
Tensile strength
Yield strength
Hardness
If you need to add a clasp/s made from wrought alloys to metal-based RPD:
Y
You should add it to the acrylic part of the denture
They are usually made from Co-Cr alloys
It is usually soldered to the closest part of the metal base
They are made with a gauge from 18-22
None of other choices
Regarding preparing guiding planes:
Y
They are always prepared on the proximal surfaces
They are 4-5 mm cervico-occlusally
They are larger on the abutment teeth in distal extension RPD
They should be prepared after preparing the rests seats when applicable
None of other choices
The survey line of abutment teeth could be adjusted to:
Y
Permit the retentive arm tip to be placed in the middle third
Reduce the amount of relief for the minor connectors
Usually prepared with a bur angled to the log axis of the opposing tooth
It should be prepared before the primary impression stage
None of other choices
Regarding the preparation of rest seats for metal-based RPD:
Y
It should be always prepared whenever a rest is going to be placed
It should be prepared toward the pulp
It should be prepared with an inverted cone bur
It needs at least 2 mm depth whenever possible
None of other choices
For occlusal rest seats:
Y
It should be inclined toward the marginal ridge
It should be a rounded triangle with the base centrally when viewed occlusally
The width should be about 1/3 of the mesio-distal width of the abutment
The angle at the marginal ridges should be obtuse
None of other choices
For cingulum rest seats:
Y
It is usually prepared on the lower canines
It is usually 1.5 mm depth
It is prepared with a round diamond bur
It could be a part of lingual plating
None of other choices
What is the incorrect statement regarding an occlusal rest seat?
Y
It should be properly shaped with round angles
It should direct forces along the long axis of the tooth
It should be prepared before the guide planes
Its bucco-lingual width is one half the bucco-lingual dimension of the tooth
None of other choices
What is the least desirable rest of the followings?
Y
Incisal rest
Occlusal rest
Cingulum rest
Embrasure rest
Ball rests
All of the followings are functions of rests except:
Y
Transfer occlusal forces to the abutment teeth
They could perform function of direct retainers
Maintain the clasps in their position
Prevent the impaction of food between the abutment and the clasp
None of other choices
What is the incorrect statement regarding incisal rests?
Y
It is usually used on mandibular canines
It is the least desirable rest
Its seat form is usually V shape notch with 1.5 mm depth
It is always preferred over the lingual rests
None of other choices
When you plan a crown for a mandibular canine what type of rest would you prepare on this tooth?
Y
Occlusal rest
Lingual rest
Incisal rests
Right angle rest
All of other choices
29. The angle between the rest and the minor connector must be less than 90 degree because if it is not, the rest will allow the prosthesis to move away from the abutment tooth with the rapid failure of the prosthesis.
Y
The statement is correct but the cause is incorrect
The statement is incorrect but the cause is correct
The statement and the cause are correct
The statement and the cause are incorrect
None of the other choices
Which one of the following rests does not have a reciprocal arm?
Y
Spoon shape rest
Ledge shape rest
Inverted v-shaped rest
Half moon shape rest
None of the other choices
The best restoration to support an occlusal rest is:
Y
Silver amalgam
Resin composite
Porcelain of the full crown restoration
Metal of the full crown restoration
None of other choices
Regarding tripodizing a cast:
Y
It is essential for distal extension bases only
Requires cast being placed on zero tilt
It is not essential for bounded saddles
It is helpful for master cast surveying
none of other choices
Regarding zero-degree surveying:
N
It is essential in every case of partially dentate arch needs RPD treatment
The base of the cast should be parallel with the floor
It is highly indicated to be the only surveying for design
All of other choices
A+C
After surveying the study model, you need:
Y
To block out the proximal undercut areas
To assess the possible tooth preparation after secondary impression
To send the study model for duplication
To send the study model back to the clinic along with a proper design
None of other choices
Choose the correct serial for making metal-base RPD:
Y
Primary impression, Surveying and design, 2nd
impression, mouth preparation, Metal try-in
Primary impression, surveying and tripodizing, Design, Jaw registration, 2nd
impression, metal try-in
Primary impression, surveying and design, mouth preparation, 2nd
impression, metal try-in
Primary impression, surveying and design, jaw registration, Moth preparation, 2nd
impression, metal try-in
None of other choices
Regarding acrylic RPDs:
Y
They are lighter than metal RPD
They are less bulky than metal RPD
They require rest seat preparation
They are gum strippers
They are tooth and mucosa borne partial dentures
For making an acrylic RPD:
Y
You need to get 2nd
impression always
Jaw registration is essential
Shade selection is usually in the first visit
You need to block out the facial undercut areas
None of other choices
Regarding acrylic RPDs:
Y
The minimal thickness is 1.5-2 mm at any point
The flanges should follow the anatomical land marks when applicable
You need a retentive clasp on each abutment tooth
It is commonly used as a temporary aesthetic solution
All of other choices
Regarding classification of partially dentate arches:
Y
Kennedy classification is dependent on load distribution
Craddock one is dependent on saddle distribution
You need direct retainers only in class I, II, and IV Kennedy classification
Applegate one is a helpful classification system
None of other choices
Choose the correct serial of the following laboratory steps for metal-base RPDs:
Y
Master cast block-out, duplication, wax pattern build-up, casting, spruing, finishing and polishing
Duplication, wax pattern build-up, spruing, investing ring, casting, finishing and polishing
Duplication, wax pattern build-up, casting, investing ring, framework recovery, finishing and polishing
Master cast duplication, spruing, wax pattern build-up, investing ring, casting, finishing and polishing
None of other choices
For treatment plan formulation, choose the correct serial:
Y
Preparatory phase, corrective phase, treatment phase, maintenance
Preparatory phase, treatment phase, corrective phase, after care
Preparatory phase, prophylaxis phase, restorative phase, after care
Preparatory phase, treatment phase, laboratory phase, after care
None of other choices
Regarding special trays for metal-base RPDs:
Y
All special trays are spaced with a proper wax to give room for the impression materials
They should have handles
They should be perforated for alginate impression materials
They are made from acrylic resin
All of other choices
Regarding elastomeric impression materials for metal-base RPDs:
Y
They are rigid, making retrieval of the cast difficult
They are more accurate than alginate impression materials
They are of high dimensional stability
They require relatively long setting time
All of other choices
Regarding altered cast impressions:
Y
They are essential in every class I or II Kennedy classification
They are made after metal try-in with a full arch special tray
They are usually made with alginate impression material
They require full border moulding for the available tray
None of other choices
Regarding altered cast technique:
Y
The impression should be made with finger pressure on the saddle areas
You need to stabilise the framework with an anterior third point of reference for seating the tray
You need to cut the original cast at the external finish line border
You need a partial tray with 1 mm wax spacer
None of other choices
When you compare Applegate technique to relining RPDs:
Y
Applegate technique is less demanding
Relining is better to keep the original jaw registration
Relining is less accurate than Applegate technique
Both will produce an occlusal discrepancy
None of other choices
Regarding metal base RPDs try-in stage:
Y
Mandibular major connector must be polished on the fitting surface
It must have complete and stable seating on the master cast
Relief areas must be visible where indicated
The occlusal interferences is usually coming from an occlusal rest at the marginal ridge
All of other choices
Regarding the cast stops in Co-Cr RPDs:
Y
They are essential for bounded saddles
They are placed in the middle of distal extension base
They are required to keep a space for the impression materials
They are helpful to make intimate fit of the metal base
None of other choices
Comparing open construction (lattice) to mesh construction:
Y
Acrylic resin is better retained by the mesh form
It is usually recommended to use the lattice form
The mesh form is more rigid than the lattice one
It is easier to set teeth over the lattice form
All of other choices
Regarding theories of design:
Y
Stress equalization is employing stress directors
Stress equalization is better in bone resorption wise
Physiologic basing requires minimal retention
Broad stress distribution is complicating the oral hygiene
All of other choices
For designing class II Kennedy cases (no modification):
Y
Generally, you need at least 4 clasp assemblies
2 indirect retainers are required
You need a maximum coverage major connector in the maxilla
Lingual plating is contra-indicated
None of other choices
For designing class IV Kennedy cases:
Y
You need 4 clasps assemblies
Broad palatal co