Tooth Preparation in Operative Dentistry

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Questions and Answers

What is the primary goal of tooth preparation?

To restore the integrity of the tooth surface and function (correct)

To remove diseased tissue only

To increase the size of the tooth

To change the color of the tooth

What is dental caries?

A type of tooth fracture

A genetic disorder affecting the teeth

A type of tooth restoration

An infectious microbiologic disease that results in localized dissolution and destruction of the calcified tissues of the teeth (correct)

What is nomenclature in the context of dentistry?

A type of dental instrument

A type of dental restoration

A set of terms used in communication by persons in the same profession (correct)

A type of dental disease

What is the term used to describe a tooth preparation that involves only one tooth surface?

Simple Signup and view all the answers

What is the characteristic of pit-and-fissure caries?

It forms a small area of penetration in the enamel at the bottom of a pit or fissure Signup and view all the answers

What is the shape of the carious lesion in pit-and-fissure caries?

Two cones, base to base Signup and view all the answers

What is the abbreviation for a tooth preparation involving the mesial and occlusal surfaces?

MO Signup and view all the answers

What is the direction of the apex of the dentin cone in pit-and-fissure caries?

Towards the pulp Signup and view all the answers

What is the term used to describe the surface of a tooth preparation that faces the adjacent tooth?

Proximal Signup and view all the answers

What type of caries affects the root surfaces of the tooth?

Senile caries Signup and view all the answers

What is the term used to describe an internal cavity surface lying in the direction of the long axis of the tooth?

Axial Wall Signup and view all the answers

What is the base of the cone in smooth-surface caries?

On the enamel surface Signup and view all the answers

What is the term used to describe a prepared surface that extends to the external tooth surface?

External Wall Signup and view all the answers

What is the term used to describe the junction of two or more prepared surfaces?

Angle Signup and view all the answers

What is the term used to describe an angle formed by the junction of two walls along a line?

Line Angle Signup and view all the answers

What is the term used to describe a prepared wall that is reasonably flat and perpendicular to the long axis of the tooth?

Floor Signup and view all the answers

Study Notes

Definition of Tooth Preparation

Tooth preparation is the mechanical alteration of a defective, injured, or diseased tooth to receive a restorative material that reestablishes a healthy state for the tooth with normal form and function.

Objectives of Tooth Preparation

Remove diseased tissue as necessary
Restore the integrity of the tooth surface
Restore the function of the tooth to withstand mastication forces
Restore the appearance of the tooth

Nomenclature and Tooth Preparation Terminology

Nomenclature refers to a set of terms used in communication by persons in the same profession
Tooth preparation terms:
- Simple: involving one tooth surface
- Compound: involving two surfaces
- Complex: involving three or more surfaces
Abbreviated descriptions of tooth preparations:
- O: occlusal tooth preparation
- MO: preparation involving mesial and occlusal surfaces
- MOD: preparation involving mesial, occlusal, and distal surfaces

Tooth Preparation Walls

Proximal wall: surface facing the adjacent tooth
Internal wall: a prepared surface that does not extend to the external tooth surface
Axial wall: internal cavity surface lying in the direction of the long axis of the tooth
Pulpal wall: internal cavity surface lying horizontally in relation to the pulp, oriented perpendicular to the long axis of the tooth
External wall: prepared surface that extends to the external tooth surface, takes the name of the tooth surface it faces

Tooth Preparation Angles and Line Angles

Tooth preparation angles: junction of two or more prepared surfaces
Line angles: angle formed by the junction of two walls along a line
Examples of line angles:
- Axio-pulpal line angle
- Bucco-axial line angle
- Gingivo-axial line angle

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Description

Learn about the definition and objectives of tooth preparation in operative dentistry, including removing diseased tissue and restoring tooth function.