Tooth anatomy for endo

Question 1

Access Shapes
Anterior
Bicuspid
Max Molar
Mandibular molar

Answer 1

Ovoid
Ovoid
Triangular
Rhomboid

Question 2

Max incisor

Answer 2

oval, rounded triangle,
affects central and lateral

100% - single canal

Question 3

Max canine

Answer 3

ovoid

100% 1 canal

Question 4

max premolar

Answer 4

ovoid
1st max 60% has 2 canals
6% of time has 3 canals

2nd max premolar 90% has 1 canal
2 canals is 10%

3rd root in a premolar is variation

Question 5

Max 1st mmolar

Answer 5

most complx
rhomboid access
3 roots, but 4 canals

palatal root 100% 1 canal
DB rooth is 100% 1 canal
MB root is 20-80% 2 canals

Question 6

Max 2nd molar

Answer 6

Coronally resebles max 1st
more variation
1-4 roots

roots are fused

Question 7

Mand incisor

Answer 7

triangular to ovoid
30% chance of having 2 canals that merge

15% chance of having 2 canlas that DONT MERGE

MOST DIFFICULT TOOTH TO ACCESS
*facial is easier to get into

Question 8

Mand canine

Answer 8

ovoid
smaller than max

3% have 2 canals

Question 9

Mand premolar

Answer 9

ovoid
1st mand premolar - 75% have 1 canal, 25% have 2 canals, 1 % has 3 canals

2nd mand premolar 85% 1 canal, 15% has 2 canals

Question 10

Mand 1st molar

Answer 10

rhomboid access/trapezoid
2 roots
3-4 canals

mesial root has 2 canals 70% of time

distal root has 2 canals 15% of the time

Radix entomolars is a 3rd root common in asian populations @ distal not off to the side

Question 11

Mand 2 molar

Answer 11

smaller
more square
distal root has 2 canals 5% of time

variation
cshape

Question 12

1 canal is almost always @

Answer 12

max antieriors, max 1st premolars w 2 roots, palatal and DB root of max 1st molar

Question 13

pulp horn follows height of crown contour

Answer 13

.