Principles of Cavity Preparation Part 2 Quiz

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What is the first step in the initial tooth preparation stage?

Primary retention form
Outline form and initial depth (correct)
Convenience form
Primary resistance form

Which of the following is NOT a step in the final tooth preparation stage?

Removal of any remaining infected dentin or old restorative material
Pulp protection, if indicated
Secondary resistance and retention forms
Primary retention form (correct)

What is the purpose of removing infected dentin during tooth preparation?

To increase the retention of the restoration
To prevent further caries progression (correct)
To improve the esthetics of the restoration
To create space for the restorative material

What is the difference between infected and affected dentin?

Infected dentin is the outer layer, and affected dentin is the inner layer (D) Signup and view all the answers

Which step in the final tooth preparation stage involves finishing the external walls of the cavity?

Step 8: Procedures for finishing external walls (B) Signup and view all the answers

What is the last step in the final tooth preparation stage?

Final procedures—cleaning, inspecting, desensitizing (B) Signup and view all the answers

What is the purpose of removing any remaining enamel pit, infected dentin, or old restorative material in the final tooth preparation stage?

To enhance the esthetic result of the new restoration. (B) Signup and view all the answers

When should remaining old restorative material be removed according to the text?

If it can compromise the esthetic result of the new restoration. (A) Signup and view all the answers

What is the purpose of pulp protection in the final tooth preparation stage?

To protect the pulp or aid pulpal recovery. (C) Signup and view all the answers

Why is it essential to remove any old restorative material that may compromise the amount of needed retention?

To ensure proper adaptation for receiving the final restorative material. (A) Signup and view all the answers

Under what conditions should radiographic evidence prompt the removal of old restorative material in tooth preparation?

If caries are present under the old material. (C) Signup and view all the answers

What are the two primary features of finishing the external walls of a tooth preparation?

Design of the cavosurface angle and smoothness of the wall (B) Signup and view all the answers

Why is beveling contraindicated when using amalgam, except in specific cases?

It reduces the strength of the amalgam (A) Signup and view all the answers

Why is a 90-degree cavosurface angle recommended for materials like amalgam and ceramic?

To enhance strength due to low edge strength of these materials (C) Signup and view all the answers

In what specific case can a bevel be applied in a Class II tooth preparation?

When enamel is still present on the gingival floor (A) Signup and view all the answers

What factor determines the design of the cavosurface angle in tooth preparations?

The restorative material being used (D) Signup and view all the answers

Which of the following is true about the cavosurface margin in the final tooth preparation stage?

No bevels are placed at the cavosurface margin (B) Signup and view all the answers

When the tooth preparation has extended onto the root surface (no enamel present), what should the root surface cavosurface angle be for both amalgam and composite restorations?

The cavosurface angle should be exactly 90 degrees (D) Signup and view all the answers

Why is beveling of enamel margins in composite preparations indicated primarily for larger restorations?

Both a and b (A) Signup and view all the answers

What is the usual procedure for cleaning the tooth preparation?

Removing visible debris with water from the syringe and then removing visible moisture with air from the air syringe (B) Signup and view all the answers

Which of the following is a step in the final procedures for tooth preparation?

All of the above (D) Signup and view all the answers

When is beveling of the gingival floor of a Class II preparation indicated?

When enamel is still present (D) Signup and view all the answers

What are the two types of secondary resistance and retention forms mentioned in the text?

Mechanical preparation features and micromechanical treatments (C) Signup and view all the answers

Which instrument is recommended for removing any remaining enamel pit, fissure, infected dentin, or old restorative material?

Round carbide bur with air coolant and slow speed (D) Signup and view all the answers

What is NOT mentioned as a potential cause of pulpal irritation during or after operative procedures?

Excessive use of water coolant (D) Signup and view all the answers

Which type of restoration is associated with mechanical preparation features for secondary resistance and retention forms?

Amalgam (B) Signup and view all the answers

What is the purpose of secondary resistance and retention forms in tooth preparation?

To enhance retention of the restoration (D) Signup and view all the answers

What is the purpose of using a slow speed and air coolant during the removal of remaining material?

Both A and C (C) Signup and view all the answers