7/23/2019 Rpd Esthetic Part1

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Alaa Al-Otaibi Esthetic In Rem ovable Prosthodontics M arch. 2013

prof. F Fahm i

- Patients requiring rem ovable dentures have the sam e desires regarding esthetics as patients receiving xed prosthodontic therapy and they deserve the best possible treatm ent

outcom e.

Esthetic approaches in RPD : Illustration

1. G ingival

Approaching R etainer

1- I bar clasp

2. Palatal I-bar

3. RLS-system

4. Twin-flex clasp orspring-clasp

- Occlusal approaching retainer to undercut area on the m esiobucal surface of canine will very bother

esthetics.

- Esthetics of gingival approaching retainer will be better because the m etal is m ore hided.

- In the other hand it can be enhanced an indirect retainer at incisive.

- T e indirect retainer that can be selected in the form of cingulum rest beside m esial occlusal surface of

canine, em brasure hook, term inal rest, incisal rest; secondary lingual bar, and so on.

- T is way w ill be m ore aesthetic, m ore stabilize, and the free-end saddle are not easy to li up by sticky

food.

If canine and incisive has weakened, strengthen this teeth by splinting. Splinting can be conducted withorthodontic w ire, or w ith com posite in inter proxim al area.

- Splinting w ire should place as low as possible in order to m ore aesthetic appearance.

2. W rought W ire

W rought w ire is m ore exible com pared to casting retainer. Because of this characteristic

thetip of retentive arm can be placed m ore cervical to be m ore esthetic.

- In the other hand for free-end RPD with retainer design rst class lever, a m ore exible retentive arm

will decrease leverage to abutm ent teeth (act as shock absorber)

A. Com bination cast and wrought w ire

B. M eacock

C. Rush A ngker

Part2, Esthetic in Rem ovable partial denture

7/23/2019 Rpd Esthetic Part1

2/2

Alaa Al-Otaibi Esthetic In Rem ovable Prosthodontics M arch. 2013

prof. F Fahm i

3. Special D esign Labial

Bow for Retainer

T is retainer look like labial bow in orthodontic treatm ent, but there som e dierences that is

Loop part is sm aller

W ire that patch at anterior teeth should place as low as possible near gingival m argin, and for better

esthetic the w ire close over by red acrylic base.

- T e other advantage of Labial Bow like this will united anterior teeth in m astication when distal

extension base lever up, so it is act as splint for anterior teeth.

- T e disadvantage is in the early patient feels bothered its low er lip .

4- Attachm ent - Attachm ents m ay be classied as precision or sem iprecision, intracoronal or extracoronal, and resilient

or non resilient. Precision attachm ents are m achined by the m anufacturer, w hile sem iprecision

attachm ents are custom fabricated by the laboratory technician.

- disadvantage:

- T e room m ust be m ade for the attachm ent within the crown. Box form s to accom m odate the

attachm ent m ust be prepared w ithin the tooth at the tim e of tooth preparation. T is rem oves a

considerable am ount of healthy tooth structure and oen exacts a biologic price later.

5- Rotational path

Rem ovable partial

denture

- T is concept originated in the 1930s.

- T e partial denture requires two paths of insertion, with the fram ework being placed into the undercut

first and then rotated to seat the posterior clasp assem blies.

- W hen properly designed and fabricated, the rem ovable partial denture cannot be dislodged by a force

perpendicular to the plane of occlusion. T e ultim ate result is a retentive rem ovable partial denture with

no anterior clasp assem blies and the posterior assem blies in a position w here they are not visible.

6- overdenture / overlay

partial denture:

a- natural tooth

b- im plants

Som e rem ain teeth that still healthy enough but over-eruption, tipping, degree one m obility, and

considered not to extracted and conducted for root canal treatm ent.

For this rem ain teeth its clinical crown is lessened, then m ade a dow el-core or dowel with layers that

close over clinical crow n rem ains. Restoration will be functioned to give support, stability, and retention

for overdenture that m ade on it. In the other hand it also give inform ational proprioceptive, and lessen

resorption alveolar ridge.

Part2, Esthetic in Rem ovable partial denture