Reading: Class I, II, VI and Posterior Composites

Question 1

The longevity of posterior composites is directly related to 3 main factors

Answer 1

1. Size of Restoration
2. Patient’s caries Risk
3. Operatior Technique

Question 2

Indications for a posterior composite (4)

Answer 2

1. Caries in occlusal class I, VI, and II
2. Best for small or moderate sized restorations
3. Esthetics
4. Can be used to serve as a temporary crown in some economical situations

Question 3

Contraindications for posterior composite restoration (3)

Answer 3

1. Operating area cannot be isolated well
2. When teeth have high occlusal stresses applied to them
3. Defect extends onto the rooth surface, negative effects for the restoration can occur

Question 4

List 5 Disadvantages of posterior composites

Answer 4

1. Polymerization shrinkage
2. Lower fracture toughness than most indirect restorations
3. More technique sensitive than amalgam and some indirect restorations
4. Possible greater localized occlusal wear
5. Unknown biocompatibility of some components

Question 5

When AND where should children have sealants placed on their posterior teeth?

Answer 5

As soon as the tooth crown erupts

In pits and fissures

Question 6

What type of resin is used in most sealants?

Answer 6

BIS-GMA resins

Question 7

True or False

Sealants should only be placed if the surface is caries free

Answer 7

True

Question 8

List the general steps for applying a sealant

Answer 8

1. Dry tooth
2. Etch with 35-40% phosphoric acid for 15-30 seconds
3. Rinse and dry
4. Apply sealant material and cure with light