Clinical Composite

Question 1

what will happen if caries are left at the amelodentinal junction?

Answer 1

it results in unsupported enamel and early breakdown of the restoration margin if microleakage occurs

Question 2

how do you avoid enamel fracture?

Answer 2

cavity design, etch times, washing, curing protocol

Question 3

what type of dentine is favourable for the hybrid layer creation?

Answer 3

primary dentine

Question 4

what does a high configuration factor mean?

Answer 4

increased polymerisation contraction stress

Question 5

what does a low configuration factor mean?

Answer 5

reduced polymerisation contraction stress

Question 6

what is the definition of configuration factor?

Answer 6

ratio of bonded to unbonded surfaces

Question 7

what is plasticity

Answer 7

a property of a material to undergo a non-reversible change of shape in response to an applied force

Question 8

what is deformation

Answer 8

a change in shape due to an applied force

Question 9

what is the purpose of flowable composite?

Answer 9

it mediates contraction stresses on interface and to achieve optimal adaption to non-load bearing margins

Question 10

what is the main reason for reduced shrinkage stress?

Answer 10

decreased final conversion

Question 11

what is shrinkage direction determined by?

Answer 11

bonded surfaces and free surfaces