2. Clinical Composite 1

Question 1

Advantages of composite (6)

Answer 1

Aesthetics
Conservation of tooth tissue
Support for remaining tooth tissue
Adhesion/bonding
Low thermal conductivity
Elimination of galvanism

Question 2

Disadvantages of composite (6)

Answer 2

Polymerisation shrinkage
Marginal integrity
Post-op sensitivity
Mechanical properties (low fracture toughness, high elastic deformation)
Variable conversion
Technique sensitivity

Question 3

Average composite bond strength

Answer 3

21-22MPa

Question 4

Definition of hybrid layer

Answer 4

Interface between dentine and the composite resin

Question 5

Definition of dead tracts

Answer 5

Highly mineralised ends of dentinal tubules which block odontoblast processes, making them impermeable