Operative II: Advantage vs Disadvantage (Reading)

What is an advantage of composite restorations related to appearance?

Esthetics

What is an advantage of composite restorations regarding tooth preparation?

Conservative tooth preparation (less extension, minimum depth not necessary, mechanical retention usually not necessary)

What is an advantage of composites regarding thermal properties?

Low thermal conductivity

What is the advantage of composite restorations relating to versatility?

Universal use

What advantageous bonding property do composites have?

Adhesion to the tooth

What is an advantage of composite restorations that allows defects or damage to be fixed without replacing the entire restoration?

Repairability

What is one disadvantage of composite restorations related to marginal and internal adaptation?

May have poor marginal and internal cavity adaptation, usually occurring on root surfaces as a result of polymerization shrinkage stresses or improper insertion of the composite.

Where might composite restorations exhibit marginal deterioration over time?

In areas where no marginal enamel is available for bonding.

Why are composite restorations more difficult and time consuming to place compared to amalgam restorations?

-Bonding usually requires multiple steps;

-Insertion is more difficult;

-Establishing proximal contacts, axial contours, embrasures, and occlusal contacts may be more difficult;

-Finishing and polishing procedures are more difficult.

Why are composite restorations considered more technique sensitive?

Because the operating site must be appropriately isolated, incremental placement technique must be used for most materials, and proper adhesive technique is absolutely mandatory.

When might composite restorations exhibit greater occlusal wear?

In areas of high occlusal stress or when all of the tooth's occlusal contacts are on the composite material.