15 Questions
What is the function of a rest in a removable partial denture?
Provide vertical support for the RPD
What is the outline form of an occlusal rest seat?
Triangular
How should the marginal ridge be lowered for an occlusal rest seat?
1.5mm
What is the recommended width of an occlusal rest seat for molars and premolars?
2.5mm
Which type of rest is prepared on the lingual surface of a tooth?
Lingual rest
What is the primary function of interproximal occlusal rests in a direct retainer assembly?
Prevent interproximal wedging by the framework
What is the advantage of using two adjacent rests rather than a single rest in a direct retainer assembly?
Prevent interproximal wedging by the framework
What is the purpose of lowering the marginal ridge when preparing an occlusal rest seat?
To avoid elimination of the contact point and prevent wedging effect
Why should the form of an internal rest be slightly tapered occlusally and slightly dovetailed?
To prevent dislodgment proximally
What is the purpose of an internal rest in a partial denture?
Provide vertical occlusal tooth support
When preparing an occlusal rest seat, what should be used first to lower the marginal ridge and establish the outline form of the rest seat?
A larger round bur
What is the primary requirement for placing rests on sound enamel or on any restoration material?
Good oral hygiene
Where are proximal tooth surfaces more vulnerable to caries attack compared to occlusal surfaces?
They are much more vulnerable
In what restoration material should rest seat preparations be avoided to prevent fracture?
Amalgam
What should be applied to abutment teeth to reduce the risk of tooth sensitivity and caries formation during rest seat preparation?
A fluoride gel
Test your knowledge of removable partial denture rests with this quiz. Learn about the types of rests and their functions in providing support for RPDs.
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