Dr. Leibow- endo/root morphology

Question 1

What is the longest tooth in the mouth? How long was the longest tooth Dr. L has ever worked on?

Answer 1

Maxillary Canine…34mm

Question 2

How many canals does a maxillary 1st PM USUALLY (85%) have?

Answer 2

2

Question 3

How many canals does a maxillary 2nd PM usually have (75%)?

Answer 3

1

Question 4

What % of MAXILLARY 1st MOLARS have 4 canals?

Answer 4

94%….FOUR canals = ninety FOUR %

Question 5

What is the most variable tooth?

Answer 5

Maxillary 1st molar

Question 6

In a maxillary 1st molar, which root typically has 2 canals? (What %)

Answer 6

MB..90%

Question 7

What % of mandibular central incisors have 2 canals? IF it does have one, where will I find it?

Answer 7

40%…in the cingulum of the tooth

Question 8

What % of mandibular lateral incisors have 2 canals? Which tooth is LONGER, the mandiubular central or mandibular lateral?

Answer 8

40% have 2 canals… Lateral is usually 2mm LONGER then the central

Question 9

Which tooth has a lingual canal that is hard to find, in fact, Dr. L missed it on his sister-in-law…

Answer 9

mandibular first premolar (30% have the 2 roots)

Question 10

Which tooth has the trick of finding the Distal canal then looking mesial. Once mesial you split the distance to the F and L walls and find the other two canals in the middle?

Answer 10

Mandibular 1st molar

Question 11

Which tooth has that “C” shaped canal system again?

Answer 11

mandibular 2nd molar

Question 12

What is the % break down for 3 vs 4 canals in a mandibular 2nd molar?

Answer 12

50/50