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Articulator research

Articulator Research

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Page 1: Articulator Research

Articulator research

Page 2: Articulator Research

Articulators

• Articulator research by

• student / Amr Yousef Kamal

• Mansoura faculty of dentistry

Page 3: Articulator Research

Well adjusted occlusal rims united & casts returned to lab casts

mounted on an articulator so that the teeth can be set up

Page 4: Articulator Research

Articulator•reproduces certain recorded relationship-position of the mandible in relation to the maxilla

•mechanical instrument designed to simulate the movements of the mandibular arch in relation to the maxillary arch

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CJRCentric jaw relationship

ICP

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The jaw relationship in which maximal occlusal contact occurs

The position of the mandibule when the relationship of opposing occlusial surfaces provides for maximum planned contact and intercuspation

Tooth-determined position.

Intercuspal Position ICP

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Page 8: Articulator Research

Articulator• reproduces certain recorded

relationship

• simulate certain movements

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Mandibular movements (basic)

• Excursions of the mandible in 3 directions– Downward movement-opening of

the mouth(20 mm incisor separation-retruded arc of closure)

– Forward movement-protrusive(20+ & anterior translation of the condyles down the slope of the articular eminence-condylar path)

– Lateral movements –sidewaysworking side-to witch the mandible moves-immediate shide shift &rotation about vertical axisnon working side-condyle moves down and medially, Bennett Angle

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ADJUSTABILITY OF AN ARTICULATOR

The capability of the articulator to closely simulate the movements of the mandible (dependent on the adjustability of the

articulator elements)

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ELEMENTS OF AN ARTICULATOR

• horizontal axis of rotation: variability of the position of the horizontal axis of rotation in relationship to the maxillary dental cast

• condylar inclination/fossa components:variability of the angle of the eminentia, directional guidance of the superior, posterior and medial walls of the fossa, and ability to simuate laterotrusive movement

Page 12: Articulator Research

ELEMENTS OF AN ARTICULATOR

• intercondylar distance: adjustability of the distance between the vertical axis of rotation

• Benett angle/Benett movement: adjustability of the angle and capability of stimuating sideshift movement

• incisal guidance: adjustability and ability to stimulate the anterior guidance of the natural dentition

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NON ADJUSTABLE-SIMPLE HINGE

• opening and closing around a fixed axis (maximum intercuspation is the only position reproduced)

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NON ADJUSTABLEClass II: Average value

• capable for lateral movement, some are cabaple of variable location of the horizontal axis of rotation

• all of this type have fixed, arbitrary condylar inclination settings, vertical axes of rotation settings, and Benett angle. No adjustment of these elements is available. Some have a provision for incisal guidance.

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NON ADJUSTABLE-AVERAGE VALUE

• condylar angle relative to occlusal plane in average patient: : 34° Condylus sagittalis

• Capable for lateral movement, : 15° Condylus lateralis

• Incisal guidance:10°

No adjustment of movements

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Casts mounted in an average position(average values)

Balkwill and Bonwill ▲s

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ADJUSTABLE

• SEMI • Fully

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ADJUSTABLEClass III: SEMI ADJUSTABLE

• simulate lateral, protrusive and Benett movements to varying degrees

• The amount of adjustability incorporated in the design provides the degree of simulation available.

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SEMI ADJUSTABLE ARTICULATOR

• ARCON: condylar elements are on the lower member of the articulator, mechanical fossae are placed on the upper member of the articulator

• NON ARCON: condylar path simulating the glenoid fossae are attached to the lower member, condylar elements are placed on the uper portion of the articulator

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FULLY ADJUSTABLE ARTICULATORS (IV.th year-gnathology)

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ADJUSTABLECLASS IV: FULLY ADJUSTABLE

• accepts registration of all anatomic determinant of occlusal morphology, and most closely simulates the movement directed by these controls

• the incisal guidance can closely simulate the paths of natural dentition

• With facebow: The function of the facebow is to record the relationship of the maxillary arch to the horizontal axis of rotation of the mandible

• this class is fully utilized in extensive restorative procedures, as well as adjunct to diagnostic determinations of TMJ dysfunction.

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FACEBOW instead of B & B ▲s

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Articulator research

• الشهاوي االسم : علي يوسفكمال عمرو

• أسنان طب كلية الثانية الدفعة

الصناعية التركيبات لقسم مقدم• / . الدين. سعد الخضري محمد م د أ