Back to AI Flashcard MakerNursing /BDS2 OSCE Prep - RPD OSCE Part 1
What are saddles?
The teeth being replaced by RPD
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Key Terms
Term
Definition
What are saddles?
The teeth being replaced by RPD
What is seen in a patient with Kennedy Class I?
Bilateral free end saddle
What is seen in a patient with Kennedy Class II?
Unilateral free end saddle
What is seen in a patient with Kennedy Class III?
Bounded saddle
What is seen in a patient with Kennedy Class IV?
Anterior bounded saddle that crosses the midline
If there are multiple saddles, what saddle is the Kennedy Classification score based on?
The MOST POSTERIOR saddle
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| Term | Definition |
|---|---|
What are saddles? | The teeth being replaced by RPD |
What is seen in a patient with Kennedy Class I? | Bilateral free end saddle |
What is seen in a patient with Kennedy Class II? | Unilateral free end saddle |
What is seen in a patient with Kennedy Class III? | Bounded saddle |
What is seen in a patient with Kennedy Class IV? | Anterior bounded saddle that crosses the midline |
If there are multiple saddles, what saddle is the Kennedy Classification score based on? | The MOST POSTERIOR saddle |
What is support defined as in relation to RPD design? | The resistance of the denture to occlusally directed load |
What is seen in a patient with Craddock Class 1? | Tooth borne support |
What is seen in a patient with Craddock Class 2? | Mucosa borne support |
What is seen in a patient with Craddock Class 3? | Combination of tooth and mucosa borne support |
What is retention defined as in relation to RPD design? | The resistance of the denture to vertical displacement/lifting away from the tissues |
What are the different methods of providing retention to an RPD? | Clasps soft tissue undercuts path of insertion adhesion |
What is indirect retention defined as in relation to RPD design? | The resistance of the denture to rotational displacement |
What is indirect retention provided by? | Rests! (not clasps) |
What is reciprocation defined as in relation to RPD design? | Reciprocation prevents a clasp arm moving a clasped tooth |
What are the undercut gauges used when surveying for clasps? | 25mm 50mm 75mm |
There is an undercut of 0.25mm, what material would the clasp be made of? | Cobalt Chromium |
There is an undercut of 0.5mm, what material would the clasp be made of? | Wrought gold |
There is an undercut of 0.75mm, what material would the clasp be made of? | Stainless steel |
What method of support is better, tooth borne or mucosa borne? WHY? | TOOTH BORNE transmits load via periodontal ligament, more natural for patient more comfortable for patient protects soft tissue from trauma |
Why are the problems with Mucosal Support? | Must cover as large an area as possible or there will be REDUCTION OF OCCLUSAL TABLE Allows the denture base to move slightly which can cause TRAUMA TO ADJACENT GINGIVAL MARGINS |
What load of support can a healthy tooth carry? (potentially) | A healthy tooth can potentially carry its own load plus one and a half similar teeth |
What teeth are best for providing support? | 1st = molars 2nd = canines 3rd = premolars |
What teeth should be avoided when looking to provide support? | The incisors - lower incisors are weakest (smallest root) |
How should rests be positioned? | Rests positioned so that they transfer load through the long axis of the tooth to prevent tilting |
Why shouldn’t the denture base be positioned within 3mm of the gingival margin? | Soft tissue is compressible, this will place pressure at the gingival margin |
Where does mucosal support mainly come from in a maxillary denture? | Hard palate |
Where does mucosal support come from in a Mandibular denture? | Tends to come from the buccal shelf (on right and left area) Edentulous area may gain support from pear shaped pad |
Why is having support from the alveolar bone bad? | Alveolar bone RESORBS |
What are the tooth supportive components used in RPD design? | RESTS |
Where is an Occlusal Rest located? | On the occlusal surface of the tooth |
Where is a Cingulum rest located? | On the cingulum of the cingulum of the anterior teeth |
What type of rests can be used on purely acrylic dentures? Why is this tricky? | Wrought stainless steel | - causes a low base strength |