Mandibular Molars

Question 1

How many developmental lobes does a mandibular 1st molar have?

Answer 1

5 lobes

Question 2

From which proximal view is only one root visible on the mandibular molar?
a. Why?

Answer 2

Mesial

Question 3

How many triangular ridges and transverse ridges does a mandibular 1st molar have?
a. How many does a mandibular 2nd molar?

Answer 3

Ridges

a. 1st – 5 triangular ridges and no transverse ridges
b. 2nd – 4 triangular ridges and 2 transverse ridges

Question 4

Which of the three mandibular molars is the most symmetrical?

Answer 4

2nd

Question 5

What are the relative cusp sizes, from largest to smallest, of a mandibular 1st molar?

Answer 5

MB> ML = DL > DB > D

Question 6

Is the root length of a mandibular molar longer on the facial or lingual?

Answer 6

Lingual

Question 7

From a proximal view, with the mandibular molars in their normal inclination in the mouth where is the position of the facial cusp tips relative to the root apices?
a. What about the lingual cusp tips?

Answer 7

Facial in line with roots

a. Lingual – outside root apices

Question 8

Which proximal surface of a mandibular 1st molar has a broader contact area?

Answer 8

Distal

Question 9

Two buccal grooves might possibly be found on which molar?

Answer 9

1st – MB and DB

Question 10

From which proximal view is more of the facial surface visible in a mandibular molar?

Answer 10

Distal

Question 11

Is the facial embrasure between the mandibular 1st and 2nd molar wider or narrower than the lingual embrasure?

Answer 11

Narrower

Question 12

How many root canals would a typical mandibular molar 1st molar have?
a. How about a mandibular 2nd?

Answer 12

3

a. 3

Question 13

From a proximal view is the distal cusp of a mandibular 1st molar not visible?

Answer 13

Mesial

Question 14

Which of the three mandibular molars is the occlusal table smallest, relative to the occlusal outline?

Answer 14

3rd

Question 15

Where is the mesial HOC located in a mandibular molar?

a. Distal HOC?

Answer 15

Junction of O – M

a. Middle 1/3

Question 16

Which of the three facial cusps of a mandibular 1st molar is the sharpest?

Answer 16

DB

Question 17

How would you differentiate between a mandibular 1st, 2nd, and 3rd molar?

Answer 17

Differentiate

a. 1st – 5 cusps
b. 2nd – 4 cusps
c. 3rd – 4 cusp, small occlusal table

Question 18

How would you differentiate between a right and left mandibular molar?

Answer 18

Right and left

a. Find the mesial root
b. The tooth flares facial to lingual
c. Cusps to orientate