composite

Question 1

what is composite made up of?

Answer 1

fillers and resin
Resin matrix is (BIS GMA)
Also (UDMA)
TEGDMA

Question 2

what are the 6 types of composite?

Answer 2

Macrofilled – first generation. Large particles, made composite difficult to polish results in roughness. Strong but rough – not widely used now

Microfilled – smaller particles with larger total surface area. Not as strong but easier to polish. Not recommended for load bearing sites

Hybrid – a mixture of both that polishes well. Strong and easily polished

Nano – newer technology. Higher mechanical strength / wear resistance and polish well

Flowable: liner, margin sealer

Packable: alternative to Amalgam. Thought to reduce clinical steps on application but not as strong as amalgam.

Question 3

what are some properties of a composite?

Answer 3

Biocompatibility

Strength

Wear

Polymerisation shrinkage

Thermal conductivity
Elasticity

Water absorption

Question 4

how big are the increments of composite incrementally placed?

Answer 4

2mm

Question 5

what are considerations when placing a composite

Answer 5

micro leakage
moisture control
rubber dam
polish at end

Question 6

procedure of placing a composite?

Answer 6

Pulpal protection with Liner i.e. Vitrebond

Etch enamel and dentine

Prime and bond together

Light cure in accordance with manufacturer

Dispense material from syringe onto mixing pad/ into cavity : 2mm increments

Contour

Light cure in accordance with manufacturer