Composite Resin

Question 0

Name a monomer in composite resin

Answer 0

Bis-GMA

Urethane dimethacrylate

Question 1

Name a filler particle of composite resin (5)

Answer 1

Microfine silica
Quartz 
Lithium aluminium silicate
Barium aluminium silicate 
Borosilicate glass

Question 2

Name the light activated component of composite resin

Answer 2

Camphorquinone

Question 3

What is the function of low weight dimethacrylates added to composite resin?

Answer 3

To adjust viscosity and reactivity

Question 4

What is the purpose of the silane coupling agent?

Answer 4

To ensure there is a good bond between filler particles and resin
Normally, water will bond to the glass filler particles, preventing resin from bonding to the glass surface
A coupling agent is used to preferentially bond glass to resin

Question 5

What is the effect of adding filler particles? (6)

Answer 5

Improved mechanical properties
Improved aesthetics 
Increased abrasion resistance 
Lower thermal expansion
Lower polymerisation shrinkage
Less heat of polymerisation

Question 6

What wavelength of blue light is best for curing composite?

Answer 6

440nm

430-490nm

Question 7

What is the activation for self curing composite?

Answer 7

Benzoyl peroxide + aromatic tertiary amine

Question 8

What is the activation for light cured composite?

Answer 8

Camphorquinone + blue light (430-490nm)

Question 9

Which light source provides broad spectrum light for setting composite?

Answer 9

Halogen

Question 10

Which light source provides narrow spectrum light for setting composite?

Answer 10

LED