Dental Preparation Techniques

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Questions and Answers

What can cause irreversible pulpitis?

Low humidity levels

Frequent dental check-ups

Prolonged dental care

Extreme temperatures (correct)

How does the size of the pulp change over time?

It fluctuates based on diet

It increases with age

It remains constant throughout life

It decreases with age (correct)

What is essential to prevent overheating of the tooth during preparation?

Using a rotary tool

Using a lower speed handpiece

Applying a chemical agent

Employing a water spray (correct)

What can lead to pulp damage when applied to freshly cut dentin?

Bases and solvents Signup and view all the answers

What must be done before placing a restoration for a fixed prosthesis?

Remove all carious dentin Signup and view all the answers

What guideline helps conserve tooth structure?

Preparation of occlusal surface to uniform thickness Signup and view all the answers

What approach can be taken to preserve the tooth structure when preparing it for restoration?

Use a partial coverage rather than complete coverage Signup and view all the answers

What is a recommended preparation angle for tooth conservation?

Minimum practical convergence angle Signup and view all the answers

What is the main reason why restorative materials are required for teeth?

Enamel or dentin can be lost due to damage Signup and view all the answers

Which of the following is NOT a biological consideration during tooth preparation?

Use of electric drills is important Signup and view all the answers

What can inadequate crown contour lead to during fixed restorations?

Difficulty in plaque control Signup and view all the answers

What is a common error in dentistry that relates to adjacent teeth during procedures?

Iatrogenic damage to adjacent teeth Signup and view all the answers

To prevent damage to adjacent teeth, which tool should be used during tooth preparation?

Metal matrix band Signup and view all the answers

What is an appropriate method to prevent damage to soft tissues during tooth preparation?

Implementing retraction with an aspirator tip Signup and view all the answers

Which structure is at risk of damage during the tooth preparation process?

All of the above Signup and view all the answers

Which statement correctly reflects the understanding of tooth preparation?

All surgical procedures involve risk of iatrogenic damage Signup and view all the answers

What is one of the key guidelines for conserving tooth structure during preparation?

Preparing the axial surfaces to retain residual tooth structure around pulpal tissues Signup and view all the answers

When may orthodontic repositioning of teeth be necessary during tooth preparation?

If it helps achieve better positioning for tooth structure preservation Signup and view all the answers

Which margin geometry is preferred during tooth preparation?

Conservative yet compatible with other principles of tooth preparation Signup and view all the answers

What is a disadvantage of apical extension in tooth preparation?

It may cause unnecessary pulp exposure Signup and view all the answers

What is a significant benefit of supragingival margin placement?

Easier access for evaluation at recall appointments Signup and view all the answers

Which of the following describes a characteristic of supragingival margins?

They are more easily finished without harming soft tissues. Signup and view all the answers

What defines a subgingival margin?

A margin created when caries or restorations extend below the gum line Signup and view all the answers

Choosing a margin geometry during tooth preparation should primarily aim to?

Ensure compatibility with principles of tooth preparation while being conservative Signup and view all the answers

Study Notes

Biological Considerations

Tooth preparation requires precision to avoid tissue damage
Poor preparation leads to plaque accumulation and complications for fixed restorations
Adjacent teeth, soft tissues, and tooth pulp are vulnerable during preparation

Prevention of Damage During Tooth Preparation

Adjacent teeth: Use metal matrix bands and tapered diamonds to protect the adjacent tooth.
Soft tissues: Use an aspirator tip and mouth mirror for retraction to prevent damage to soft tissues.
Pulp: Protect from excessive heat, chemical irritation, and bacterial action.
- Excessive pressure, high rotational speeds, and sharp cutting tools increase heat.
- Water spray helps to cool the tooth during preparation.
- Bases, resins, solvents, and luting agents can damage the pulp, especially on freshly cut dentin.
- All carious dentin must be removed before placing a restoration.
Pulp size: Can be evaluated on a radiograph, it decreases with age.

Conservation of Tooth Structure

Guidelines for conservation:
- Utilize partial coverage restorations instead of full coverage.
- Prepare teeth with minimal convergence.
- Occlusal reduction should follow the anatomic planes to maintain uniform thickness in the restoration.
- Prepare axial surfaces to conserve the maximum amount of tooth structure surrounding the pulp.
- Orthodontic repositioning may be necessary.
- Use conservative margin geometry that is compatible with other preparation principles.
- Avoid unnecessary apical extensions of the preparation.

Margin Placement

There are two types of margins:
- Supragingival Margin: Located above the gum line, this type is easier to finish and keep plaque-free. It also allows for easier impression making and evaluation of the restoration.
- Subgingival Margin: Located below the gum line, this type is necessary for teeth with caries, erosion, or existing subgingival restorations.

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Description

This quiz covers the biological considerations in dental tooth preparation, focusing on the importance of precision to avoid damage to adjacent teeth, soft tissues, and pulp. It also highlights techniques and materials that can be used to prevent complications during restorations and ensure optimal outcomes.