Composite Materials in Dentistry

Questions and Answers

What is composite resin?

Direct filling restorative material

What is Class III?

Found only on anterior teeth (incisors and canines) proximal surfaces not involving the incisal angle

Where is the lesion typically found in Class III?

Gingival to the proximal contact area under a well-organized plaque

Which classes of caries may develop if flossing is skipped?

Class II Signup and view all the answers

What are the parts of a prepared cavity?

Walls, Line Angles, Point Angles Signup and view all the answers

What walls are found in a simple Class III?

Labial/Facial Wall, Lingual Wall, Gingival Wall, Axial Wall Signup and view all the answers

What are line angles in a Simple Class III?

Linguoaxial Line Angle, Linguogingival Line Angle, Gingivoaxial Line Angle, Labioaxial Line Angle, Labiogingival Line Angle, Incisal Line Angle Signup and view all the answers

What is the incisal line angle?

A line angle receiving a special nomenclature Signup and view all the answers

How is the incisal line angle different from the faciolingual line angle?

It is not a faciolingual line angle Signup and view all the answers

What are the point angles in a Simple Class III?

Facioaxiogingival Point Angle, Linguoaxiogingival Point Angle, Incisoaxial Point Angle Signup and view all the answers

What is the special point angle in a Simple Class III?

Incisoaxial Point Angle Signup and view all the answers

How do you gain access to the compound Class II prep?

Lingual Signup and view all the answers

What are the walls of a compound Class III?

Incisal Wall, Facial Wall, Gingival Wall, Axial Wall Signup and view all the answers

What are the line angles of a compound Class III?

Incisoaxial Line Angle, Labioincisal Line Angle, Labioaxial Line Angle, Labiogingival Line Angle, Gingivoaxial Line Angle Signup and view all the answers

What are the point angles in a Compound Class III?

Labioincisoaxial Point Angle, Labiogingivoaxial Point Angle Signup and view all the answers

What are the 2 basic forms of Class V preparation?

Kidney-shape/ Bean-shape, Trapezoid/ Ferrier Signup and view all the answers

What internal wall does not exist in Class V?

Pulpal wall Signup and view all the answers

What are the 2 segments of a Class IV preparation?

Proximal Segment, Incisal Segment Signup and view all the answers

What is a Compound Class IV MI?

No mesial and incisal walls Signup and view all the answers

What is a Compound Class IV DI?

No distal and incisal walls Signup and view all the answers

What are the walls of Compound Class IV MI on the incisal segment?

Distal Wall, Facial Wall, Lingual Wall, Pulpal Floor Signup and view all the answers

What are the walls of Compound Class IV MI on the proximal segment?

Facial Wall, Lingual Wall, Gingival Wall, Axial Wall Signup and view all the answers

What are the preparation designs for Class III, IV, and IV?

Conventional Preparation Design, Beveled Conventional Preparation Design, Modified Preparation Design Signup and view all the answers

What is a conventional preparation design?

Preparation design with butt-joint or 90º or at right angle Signup and view all the answers

What is the depth of retention grooves, undercuts or coves in dentin in conventional preparation design?

0.5 mm Signup and view all the answers

What bur is used in placing undercuts in conventional preparation design?

1/4 round bur Signup and view all the answers

Where do you put the undercut in a Class III and Class V restoration?

Gingival wall, Incisal or occlusal wall Signup and view all the answers

What is the depth of conventional preparation design in root surface?

0.75mm - 0.8mm Signup and view all the answers

What materials are indicated for conventional preparation design?

Porcelain Signup and view all the answers

What was the first tooth-colored filling material invented by Fletcher in England in 1807?

Silicate cement Signup and view all the answers

Where are composites used in a conventional preparation design?

Root surface Signup and view all the answers

What is the Beveled Conventional Preparation Design?

Characteristics are similar to the conventional preparation design having external box-like walls but with beveled enamel margins Signup and view all the answers

What is the width of bevel in a beveled conventional preparation design?

0.5mm Signup and view all the answers

What is the angle of bevel in a beveled conventional preparation design?

45 degrees Signup and view all the answers

When is a beveled conventional preparation design typically indicated?

To replace existing restorations with conventional preparation design where enamel margins are present Signup and view all the answers

Study Notes

Composite Resin

Direct filling restorative material.

Class III Restoration

Found exclusively on anterior teeth (incisors and canines).
Involves proximal surfaces (mesial and/or distal) without affecting incisal angle.
Lesion typically presents gingival to the proximal contact area under well-organized plaque.
Skipping flossing can lead to Classes II, III, and IV caries on proximal areas.

Cavity Preparation

Prepared cavities consist of walls, line angles, and point angles.
Types of walls in a simple class III restoration: labial/facial, lingual, gingival, and axial (no incisal wall).
Six types of line angles exist in a simple class III restoration, including various labio and linguo combinations.
Incisal line angle has unique nomenclature and is distinct from faciolingual line angle.
Point angles in a simple class III include incisoaxial, facioaxiogingival, and other combinations.

Compound Class III Restoration

Access to compound class II preparations is gained from the lingual aspect.
Walls in a compound class III include incisal, facial, gingival, and axial walls.
Line angles and point angles in compound class III have names related to their locations and orientation.

Class IV Preparation

Preparation involves two segments: proximal and incisal.
Compound Class IV MI lacks mesial and incisal walls.
Compound Class IV DI lacks distal and incisal walls.
Walls for compound Class IV MI on the incisal segment include distal, facial, lingual, and pulpal floor.
Walls in the proximal segment of compound Class IV MI consist of facial, lingual, gingival, and axial walls.

Preparation Designs

Types of preparation designs include conventional, beveled conventional, and modified designs, suitable for Classes III and IV.
Conventional preparation design features butt-joint or right angle (90º) configurations.
Depth of retention grooves in conventional designs is typically 0.5 mm and uses a 1/4 round bur.
Conventional preparation designs are indicated for silicate cement, porcelain, amalgam, and composite resins.
Silicate cement, the first tooth-colored filling material, was invented by Fletcher in 1807.

Beveled Preparation Design

Similar to conventional design but includes beveled enamel margins, aiding in restoring existing restorations.
The bevel in this design is typically 0.5 mm wide with an angle of 45 degrees.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Explore the essential terms related to composite materials and Class III restorations in dentistry. This quiz will help you understand key definitions and concepts applicable to dental restorative procedures. Ideal for dental students and professionals looking to enhance their vocabulary.