Endo root canal variations

Question 1

Which three teeth have a 98-100% one canal?

Answer 1

1. max central incisor
2. max lateral incisor

3 max canine

Question 2

mandibular centrals %:

1 canal:

2 canals which join:

2 canals with separate foramina:

Answer 2

1 canal: 70%

2 canals which join: 25%

2 canals with separate foramina: 5%

Question 3

mandibular laterals %

1 canal:

2 canals which join:

2 canals with separate foramina:

Answer 3

1 canal: 56%

2 canals which join: 30%

2 canals with separate foramina: 15%

Question 4

mandibular canine %

1 canal:

2 canals which join:

2 canals with separate foramina:

Answer 4

1 canal: 70%

2 canals which join: 15%

2 canals with separate foramina: 15%

Question 5

max 1st premolar:

what is % of having 1 root? 2 roots? 3 roots?

Answer 5

1 root: 37%

2 roots: 57%

3 roots: 6%

Question 6

Max 1st premolar %

• 1 canal
• 2 canals
• 3 canals

Answer 6

1 canal: 9%

2 canals: 85%

3 canals: 6%

Question 7

max 1st premolar:

1 root, 1 canal:

1 root, 2 canals, 1 foramen:

1 root, 2 canals, 2 foramina:

2 roots, 2 canals:

3 roots, 3 canals:

Answer 7

1 root, 1 canal: 9%

1 root, 2 canals, 1 foramen: 13%

1 root, 2 canals, 2 foramina: 15%

2 roots, 2 canals: 57%

3 roots, 3 canals: 6%

Question 8

maxillary second premolar:

Answer 8

2 separate canals: 35-50%

Question 9

Maxillary first molar:

Answer 9

3 roots, 4 canals: 59%

4 roots and 3 canals: 41%

Question 10

what are the three roots in a max first molor, and which is most likely to have 2 canals?

Answer 10

MB, DB, palatal

MB may have 2.

Question 11

Maxillary 2nd molar:

2 roots, 2 canals:

3 roots, 3 canals:

3 roots, 4 canals:

Answer 11

2 roots, 2 canals: 13%

3 roots, 3 canals: 60%

3 roots, 4 canals: 21%

Question 12

maxillary second molar is most likley to have how many canals?

Answer 12

3 canals (60%)

Question 13

mandibular 1st premolar:

Answer 13

1 canal: 70%

2 canals: 25%

Question 14

mandibular second premolar

Answer 14

1 canal: 85%

2 canal: 10%

Question 15

mandibular first molar %

2 roots:

3 roots:

Answer 15

2 roots: 98%

3 roots: 2%

Question 16

mandibular first molar mesial root:

2 canals:

1 canal:

Answer 16

2 canals: 93% (separate foramine 60%)

1 canal: 7%

ML canal is lingual and slightly distal to MB canal

Question 17

mandibular first molar distal root:

2 canals:

1 canal:

Answer 17

2 canals: 29% (separate foramina 39%)

1 canal: 71%

Question 18

mandibular second molar:

Answer 18

4 canals: 7%

3 canals: 67%

2 canals: 25%

Question 19

which tooth is the longest overall?

Answer 19

max canine (26 mm)

Question 20

which tooth is longer - max first premolar or max second premolar?

Answer 20

max first premolar (21.8 mm)

max second premolar (21 mm)