DDM ORAL ANATOMY

Question 1

What type of teeth do humans have?
a. Monodont and Heterodont
b. Monophyodont and Haplodont
c. Heterodont and Diphyodont
d. Monodont and Homodont

Answer 1

Heterodont and Diphyodont

Question 2

What is the difference between an anatomical crown and a clinical crown?
a. An anatomical crown is from the CEJ and extends until the occlusal surface of the tooth, while the clinical crown is what we see inside the oral cavity.
B. The clinical crown is fixed, while the anatomical crown is not.
C. The size of the anatomical crown is more variable than the clinical crown.
d. The entire anatomical crown is always visible in the oral cavity

Answer 2

An anatomical crown is from the CEJ and extends until the occlusal surface of the tooth, while the clinical crown is what we see inside the oral cavity.

Question 3

Comparing permanent and primary teeth shows which of the following?
a. The roots of permanent teeth are more diverging and are narrower.
b. Primary teeth have more prominent cervical bulge.
c. Roots of primary teeth are shorter and wider.
d. The pulp horns of permanent teeth are closer to the occlusal surface.

Answer 3

Primary teeth have more prominent cervical bulge

Question 4

Which of the following teeth feature a trapezoidal crown outline?
a. Distal surface of 22 and mesial surface of 36
b. Mesial surface of 16 and labial surface of 21
c. Distal surface of 27 and distal surface of 31
d. Labial surface of 13 and mesial surface of 46

Answer 4

Mesial surface of 16 and labial surface of 21

Triangular interior mesial and distal
“Trapped ant”
Trapezoidal anterior Facial lingual
Trapezoidal posterior buccal lingual
Rhomboid post mandibular

Question 5

What ridge is found exclusively on maxillary molars?
a. Transverse ridge
b. Mesial marginal ridge
c. Oblique ridge
d. Triangular ridge

Answer 5

Oblique ridge

Question 6

In centric occlusion, the mesiolingual cusp of the maxillary third molar will contact:
a. the central fossa of the mandibular second molar
b. the central fossa of the mandibular third molar
c. the distal marginal ridge of mandibular first molar and mesial marginal ridge of the second molar
d. the distal marginal ridge of mandibular second molar and mesial marginal ridge of the third molar

Answer 6

the central fossa of the mandibular third molar

Question 7

Which permanent tooth has the greatest CEJ contour?
a. 42
b. 33
c. 22
d. 21

Answer 7

21 - Mesial

Question 8

Which of the following teeth occlude with only 1 tooth in the corresponding arch?
a. 18 and 42
b. 31 and 28
c. 48 and 41
d. 32 and 18

Answer 8

31 and 28

Question 9

groove unique to maxillary lateral incisors
a. Mesiolingual developmental groove
b. Oblique groove
c. Mesial developmental groove
d. Palato-gingival groove

Answer 9

Palato-gingival groove

Question 10

What do you call the tooth numbering system that designates each tooth from 1 to 32?
a. FDI
b. Universal Numbering System
c. Military System
d. Palmer’s

Answer 10

Universal Numbering System