Endo Anatomy

Question 1

Max Central Incisors

Avg. length and # of canals

Answer 1

23.5mm

1 canal 100% of the time

Question 2

Where is the canal located in a maxillary central incisor? Is there a curve?

Answer 2

Above the incisal edge - nice and round

Commonly takes a distal curve

Question 3

Max Lateral Incisor

Avg. length and # of canals

Answer 3

22mm
1 canal (99.9%)

Question 4

Max Canine

Avg. length and # of canals

Answer 4

26.5mm
1 canal (99.9%)

Question 5

What tooth is usually the longest tooth with one canal, very narrow in apical third, may have a pronounced curve, and sometimes longer than 31mm?

Answer 5

Maxillary Canine

Question 6

Max First Premolar

Avg. length and # of canals

Answer 6

21.8mm
# of canals
   1 - 9%
   2 -  85%
   3 - 6%

Question 7

Does the max lateral incisor curve?

Answer 7

Often takes a distal curve

Question 8

The pulp is always at the center of the tooth at the ?

Answer 8

CEJ

Question 9

What the the max first bicuspid roots usually called?

Answer 9

Mesio-distal

Bucco-palatal

Question 10

What tooth may have a deep pulp chamber then split, sometimes 1 root and 2 canals, but normally 2 roots and 2 canals?

Answer 10

Max first bicuspid - very SYMMETRICAL

Question 11

Max Second Premolar

Avg. length and # of canals

Answer 11

21mm
# of canals
   1 - 75%
   2 - 24%
   3 - 1%

Question 12

Which max premolar more often has 1 root, but may have 2 canals that often merge, and usually fairly straight?

Answer 12

Max 2nd premolar

Question 13

Max first molar

Avg. length and # of canals

Answer 13

19.5mm
# of canals
3 - 6%
4 - 94%**

Question 14

Which is the most variable tooth?

Answer 14

Max 1st molar

Question 15

Names of the 4 canals of the max 1st molar?

Answer 15

1. MB
2. DB
3. Palatal
4. MB2 (80% of the time - but same foramen as MB)

Question 16

Usually 1-3 roots but 2-4 canals describes what tooth?

Answer 16

Max 1st molar

Question 17

Max 2nd Molar - closely resembles 1st molar

Avg. length and # of canals

Answer 17

20.0mm
4 roots can be found but in close proximity
3 roots - 60%**
2 roots - 25%
1 root - 10%

Question 18

What tooth usually has 2-3 canals, often buccal canals have common orifice which are close together?

Answer 18

Max 3rd Molar

Question 19

Mand. Central Incisor

Avg. length and # of canals

Answer 19

21.5mm
# of canals
1 - 70%
2 - 30% (Dr. Leibow say 40%***)

Question 20

Mand. Lateral Incisor

Avg. length and # of canals

Answer 20

22.4mm
# of canals
1 - 57%
2 - 43%

Question 21

The mand. lateral incisor is very similar to the mand centrals except what 2 things?

Answer 21

1. Longer by 2mm

2. Often curves distally

Question 22

What tooth is the second longest tooth, may have 2 canals which often join apically, usually large canal, and may curve distally or labially?

Answer 22

Mandibular Canine

Question 23

Mand. First Premolar - “weirdest tooth” - Dr. Leibow

Avg. length and # of canals

Answer 23

21.4mm
# of canals
   1 - 73.5%
   2 - 26%
   3 - 0.5%

Question 24

Which canal is most difficult to find on a mand. 1 st premolar?

Answer 24

Lingual canal

Question 25

Mand. 2nd Premolar

Avg. length and # of canals

Answer 25

21.4mm
# of canals
   1 - 85.5%
   2 - 14%
   3 - 0.5%

Question 26

Mand. 1st Molar

Avg. length and # of canals

Answer 26

20.9mm
# of canals
   2 - 6.5%
   3 - 64.5%
   4 - 29%

Question 27

What tooth has the greatest deal of variation in morphology? The mesial canals may be severely curved along the entire length and the distal canal may be severely curved at apex.

Answer 27

Mandibular 1st Molar

Question 28

Mand. 2nd Molar

Avg. length and # of canals

Answer 28

20.8mm
# of canals 
   2 - frequent
   3 - 53%
   4 - 47% (pretty rare)

Question 29

What shape may the canal system of the mand. 2nd molar have?

Answer 29

C shape - sometimes the M/D canals join at the apex

Question 30

What tooth rarely has 4 canals and most often has 2 canals, it is shorter then the other similar teeth and can have very curved canals and be difficult to treat.

Answer 30

Mand. 3rd Molar