restorability

Question 1

contraindications

Answer 1

1) root crack or fracture
2) defect in tooth compromizes biologic environment
3) furcation involvement with caries
4) hopeless periodontitis
5) rampant caries

Question 2

periodontal factors

Answer 2

1) biological width
2) anterior vs posterior teeth
3) sulcus depth vs biological width
4) violation of bio width

Question 3

bio width

Answer 3

1) 2 mm periodontium from bone level to the top of the sulcus

Question 4

crown lengthening

Answer 4

1) to establish a ferrule
2) a favorable bio width
3) esthetic or functional
4) better crown to root ratio
5) dark triangle visible
6) 6-8 week healing
- wait 3-6 month before restoration

Question 5

ferrule facts

Answer 5

1) band that circles the external dimensions of the tooth
2) about 2 mm on natural tooth
3) axial wall must be parallel and minimum of 1 mm
4) the longer the ferrule the better
- can increase fracture due to deficiency on lingual

Question 6

endo restorative surface

Answer 6

1) loss of sound tooth structure
2) more natural tooth the better

Question 7

occlusal factors

Answer 7

1) where the tooth is located, it can affect the occlusal force
2) why second molars are more likely to fail
3) absence of proximal contacts

Question 8

patient factors

Answer 8

1) age
2) tolerance
3) medical status
3) systemic conditions
4) general attitude
5) financials
6) patient preference

Question 9

clinician factors

Answer 9

1) gender
2) specialist or GP

Question 10

factors influencing vertical root fracture

Answer 10

1) prevalence is much greater in endo teeth
2) loss of structural integrity

Question 11

3-2-1 rule

Answer 11

1) 3 mm bio width
2) 2 mm ferrule
3) 1 mm dentin width at crown margin for posterior endo teeth