Mandibular Arch Traits.Variations.3rd molar

Question 1

Where does bifurcation occur in the roots of mandibular molars?

Answer 1

Mesial and Distal roots

Question 2

Which dimension is bigger on the crown of mandibular molar teeth, M-D or B-L?

Answer 2

Mesial-Distal

Question 3

True or False; mandibular molars have cusps that are close in size?

Answer 3

True

Question 4

How do the crowns incline in mandibular molars?

Answer 4

Lingually

Question 5

What cusp is functional for mandibular molars?

Answer 5

Buccal Cusps (lingual cusps for maxillary molars)

Question 6

The tuberculum sextum affects what outline on the occlusal surface?

Answer 6

Lingual outline

Question 7

Where is tuberculum sextum typically found?

Answer 7

Between the ML and DL cusps.

Question 8

What is tuberculum intermedium?

Answer 8

The distal triangular ridge from the ML cusp.

Question 9

When do mandibular 3rd molars typically erupt?

Answer 9

18-25

Question 10

What is the proper annotation of the mandibular 3rd molars?

Answer 10

17 and 32

Question 11

When is the root completed on the mandibular 3rd molars?

Answer 11

19-27yrs

Question 12

How many cusps are visible on the mandibular 3rd molars?

Answer 12

4 cusps that are highly variable.

Question 13

True or false; the buccal grooves are uniform.

Answer 13

False, they are variable.

Question 14

True or false: the roots of mandibular 3rd molars are usually fused.

Answer 14

True

Question 15

Is the buccal lingual dimension greater on the mesial portion of the tooth or the distal portion of the tooth from an occlusal view?

Answer 15

Greater on the mesial portion