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Dental Occlusal Rest Seats Preparation

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Questions and Answers

What is the correct sequence of preparations in occlusal rest seats?

Occlusal rest seat preparation followed by proximal preparation

It does not matter which preparation is done first

Both preparations can be done simultaneously

Proximal preparation followed by occlusal rest seat preparation (correct)

What happens when proximal preparation follows occlusal rest seat preparation?

The marginal ridge becomes too high and rounded

The marginal ridge becomes too low and too sharp (correct)

The center of the floor of the rest seat moves away from the marginal ridge

The rest preparation becomes impossible to correct

Why is it often impossible to correct the rest preparation?

Because the marginal ridge is too high

Because the proximal preparation was done incorrectly

Because the center of the floor of the rest seat is too close to the marginal ridge (correct)

Because the rest seat is too deep

What is the consequence of not following the correct sequence of preparations?

The tooth may be damaged irreparably Signup and view all the answers

What is the relationship between proximal preparation and occlusal rest seat preparation?

Proximal preparation always precedes occlusal rest seat preparation Signup and view all the answers

What is the primary purpose of inclining the floor of the rest seat?

To direct forces along the long axis of the tooth Signup and view all the answers

What is the significance of rounding the proximal edge of the rest seat?

To reduce the risk of torquing the abutment tooth Signup and view all the answers

Why is the 3:01PM Mon 13 May 6◆T・5照 type of rest not commonly used?

It is not very esthetic Signup and view all the answers

What is the importance of avoiding a line angle at the junction of the axial wall and the floor?

To avoid a weaken point in the rest Signup and view all the answers

What is the purpose of extending the floor of the rest seat slightly onto the labial aspect of the tooth?

To allow for a more even distribution of forces Signup and view all the answers