Oral Anatomy: Molars

Question 1

Which is the largest permanent tooth?

Answer 1

Maxillary first molar

Question 2

Which is the only tooth that is broader lingually than buccally?

Answer 2

Maxillary first molar

Question 3

Which is the widest tooth B-L?

Answer 3

Maxillary first molar

Question 4

What is the first permanent maxillary tooth to erupt?

Answer 4

Maxillary first molar

Question 5

The maxillary first molar is the only tooth with a pronounced ___________ concavity at the CEJ?

Answer 5

Distal

Question 6

T/F: All maxillary molars have a distolingual groove with a pit.

Answer 6

True

Question 7

Which molar has a long buccal groove with a central pit?

Answer 7

Maxillary first molar

Question 8

The occlusal shape of the maxillary first molar is __________ and the proximal shape is ____________.

Answer 8

Rhomboidal; trapezoidal

Question 9

Which is the largest and smallest cusp on the maxillary first molar?

Answer 9

Largest - ML

Smallest - DL

Question 10

Where is the cusp of Carabelli found on some maxillary first molars?

Answer 10

Lingual to the ML cusp

Question 11

Which cusp on the maxillary first molar has two triangular ridges?

Answer 11

ML cusp - forms transverse and oblique ridges

Only tooth with two triangular ridges on one cusp

Question 12

On all maxillary molars, what connects the central and distal fossae?

Answer 12

Transverse groove of the oblique ridge

Question 13

Which are the shortest and longest roots of the maxillary first molar?

Answer 13

Longest - Palatal

Shortest - DB

Question 14

Which tooth has apices closest to the maxillary sinus?

Answer 14

Maxillary first molar

Question 15

What is the second most common tooth to have cervical enamel projections?

Answer 15

Maxillary second molar

Most likely is mandibular second molar

Question 16

The maxillary second molar is the closest tooth to which duct opening?

Answer 16

Stenson’s (parotid) duct

Question 17

T/F: The maxillary 2nd molar has a long buccal groove with a central pit.

Answer 17

False

Short buccal groove

Question 18

T/F: The maxillary 2nd molar has a longer root trunk than the maxillary 1st molar.

Answer 18

True

Question 19

T/F: Maxillary third molars are the shortest permanent tooth and have the shortest maxillary crowns.

Answer 19

True

Question 20

What are the most common congenitally missing teeth?

Answer 20

1. Mand 3rd molar
2. Max 3rd molar
3. Max lateral incisor

Question 21

Which tooth has a heart-shaped occlusal table?

Answer 21

Max 3rd molar

Maybe max 2nd molar if the DL cusp is missing

Question 22

T/F: On the mand 1st molar, the lingual cusps are shorter than the buccal cusps.

Answer 22

False

Buccal cusps are shorter and blunter

Question 23

T/F: The MB cusp of the mand first molar is the tallest.

Answer 23

False

MB = largest

ML = tallest

Question 24

T/F: The mand 1st molar has two buccal grooves.

Answer 24

True

Separates the three buccal cusps

Question 25

The _________ root of the mand 1st molar is longer and wider B-L.

Answer 25

mesial

Question 26

The occlusal shape of the mand 1st molar is ________ and the proximal shape is __________.

Answer 26

Pentagonal; rhomboidal

Question 27

What is the most common tooth to have CEPs?

Answer 27

Mand 2nd molar

Question 28

What is the occlusal shape of the mand 2nd molar?

Answer 28

Rectangular

Question 29

Which is the largest cusp on the mand 2nd molar?

Answer 29

MB cusp

Question 30

T/F: The root trunk of the mand 2nd molar is longer than the mand 1st molar.

Answer 30

True