✨✨Dental Anatomy Chapter 2

2. Which tooth has the shortest root relative to its crown?

A. Mandibular lateral incisor

B. Maxillary lateral incisor

C. Mandibular central incisor

D. Maxillary central incisor

D

1. When holding both any maxillary and mandibular incisor, which characteristic is most likely to apply to the mandibular incisor but not the maxillary incisor?

A. The cingulum is off center toward the distal on mandibular incisors.

B. The incisal edge is more likely to be labial to the midroot axis line on mandibular incisors.

C. The root is more likely to be straight than bent to the distal on mandibular incisors.

D. The crown has lingual ridges and fossae that are more prominent on mandibular incisors.

E. From the incisal view, the labiolingual dimension is greater than the mesiodistal dimension on mandibular incisors.

E

3. Compared to permanent maxillary lateral incisors, maxillary central incisors are more likely to exhibit:

A. Smaller crowns

B. The cingulum positioned distally

C. Lingual pits

D. Deeper and smaller lingual fossae

E. An outline (from the incisal view) that is more round or oval as opposed to triangular

B

4. Which statement(s) is/are true regarding the wear pattern of the incisal edges of anterior teeth (assuming ideal occlusion)?

A. Maxillary central incisors are likely to exhibit wear on the labial part of the incisal edge.

B. Maxillary canines are likely to exhibit wear on the labial part of the incisal edge.

C. Mandibular incisors are likely to exhibit wear on the facial part of the incisal edge.

D. Mandibular canines are likely to exhibit wear on the lingual part of the incisal edge.

E. None of the above statements are correct

C

5. All but one type of incisor have a mesioincisal angle more square (more acute) than the distal angle. Which type is the EXCEPTION?

A. Maxillary central incisor

B. Maxillary lateral incisor

C. Mandibular central incisor

D. Mandibular lateral incisor

C

7. Which incisor is considered the most symmetrical?

A. Maxillary central incisor

B. Maxillary lateral incisor

C. Mandibular central incisor

D. Mandibular lateral incisor

C

8. Which incisor is normally the narrowest (mesiodistally)?

A. Maxillary central incisor

B. Maxillary lateral incisor

C. Mandibular central incisor

D. Mandibular lateral incisor

C

6. When viewed from the proximal, which tooth (and surface) has the greatest curvature of its cervical line (cementoenamel junction) when compared to all other teeth in the mouth? A. #8, mesial surface

B. #9, distal surface

C. #10, distal surface

D. #24, mesial surface

E. #25, distal surface

A

9. Which statement is true regarding ALL incisor crowns?

A. When viewed from the facial, distoincisal angles are more square (closer to a right angle) than mesioincisal angles.

B. When viewed from the facial, the crown gets wider from the contact areas toward the cervical line.

C. When viewed from the facial, outlines are pentagon shaped.

D. When viewed from the proximal (mesial or distal), lingual outlines are S-shaped.

E. Mesial proximal contact areas are more cervical than distal contacts.

D

10. Which (if any) of the following incisors has its mesial proximal contact area (crest of curvature) at the same level incisocervically as its distal contact due to its symmetry?

A. Maxillary central incisor

B. Maxillary lateral incisor

C. Mandibular central incisor

D. Mandibular lateral incisor

E. No incisors have the mesial and distal contact areas at the same height.

C

6. When viewed from the proximal, which tooth (and surface) has the greatest curvature of its cervical line (cementoenamel junction) when compared to all other teeth in the mouth? A. #8, mesial surface

B. #9, distal surface

C. #10, distal surface

D. #24, mesial surface

E. #25, distal surface

A

7. Which incisor is considered the most symmetrical?

A. Maxillary central incisor

B. Maxillary lateral incisor

C. Mandibular central incisor

D. Mandibular lateral incisor

C

8. Which incisor is normally the narrowest (mesiodistally)?

A. Maxillary central incisor

B. Maxillary lateral incisor

C. Mandibular central incisor

D. Mandibular lateral incisor

C

9. Which statement is true regarding ALL incisor crowns?

A. When viewed from the facial, distoincisal angles are more square (closer to a right angle) than mesioincisal angles.

B. When viewed from the facial, the crown gets wider from the contact areas toward the cervical line.

C. When viewed from the facial, outlines are pentagon shaped.

D. When viewed from the proximal (mesial or distal), lingual outlines are S-shaped.

E. Mesial proximal contact areas are more cervical than distal contacts.

D

10. Which (if any) of the curvature) at the same level incisocervically as its distal contact due to its symmetry? following incisors has its mesial proximal contact area (crest of

A. Maxillary central incisor

B. Maxillary lateral incisor

C. Mandibular central incisor

D. Mandibular lateral incisor

E. No incisors have the mesial and distal contact areas at the same height.

C

11. Which of the following characteristics is seen most of the time on ALL permanent incisors?

A. The proximal view is pentagon shaped.

B. The crown is wider (in a mesiodistal dimension) than long (in an incisogingival dimension).

C. The root is longer than the crown.

D. The distoincisal angle is more acute (sharper) than the mesioincisal angle.

E. Facial and lingual crests of curvature are located in the middle third.

C

12. When holding both a maxillary and mandibular incisor, which characteristic can be used to determine which tooth is the maxillary incisor?

A. The maxillary incisal edge is rotated or twisted when viewed from the incisal.

B. The maxillary cingulum is centered when viewed from the incisal.

C. The maxillary root has prominent longitudinal grooves in both surfaces.

D. The maxillary crown has lingual ridges and fossa that are more prominent.

D

13. Which statement is true regarding all lateral incisors (maxillary and mandibular)?

A. When viewed from the facial, mesioincisal angles are more square than distoincisal angles.

B. When viewed from the facial, the crown gets wider from the contact areas toward the cervical line.

C. When viewed from the facial, outlines are wedge shaped.

D. When viewed from the proximal (mesial or distal), facial outlines are S-shaped.

E. Roots are slightly shorter than crowns.

A

14. Which incisors are most nearly identical in shape?

A. Mandibular central and lateral incisors B. Maxillary central and lateral incisors

C. Maxillary right and left central incisors D. Mandibular right and left central incisors

D

15. When holding both an extracted maxillary and mandibular incisor from the same mouth, which characteristic will apply only to the maxillary incisor?

A. The mesiodistal dimension is narrower compared to the incisocervical length.

B. The lingual anatomy is more prominent (marginal ridges pronounced and fossa deeper).

C. The incisal edge is lingual to, or centered on, the midroot axis.

D. Wear facets slope labially on the incisal edge (that is, facets are more evident on the labial surface at the incisal edge as opposed to on the lingual surface).

E. Proximal contact areas (crests of curvature) are closer to the incisal edge.

B

16. Which of the following characteristics is normally seen on ALL types of permanent incisors?

A. The proximal view is pentagon shaped (five-sided outline).

B. The crown is wider in a mesiodistal dimension than in a faciolingual dimension.

C. The root is over twice as long as the crown.

D. The cervical lines curve more on the distal surface than on the mesial surface. E. Facial and lingual crests of curvature are located in the cervical third.

E

18. Which of the following are the anatomic features of permanent maxillary central incisors?

1. Cingula

2. Mamelons

3. Cusp ridges

4. Marginal ridges

5. Cervical lines

6. Triangular ridges

А. 1, 2, 3, 6

В. 1, 2, 4, 5

С. 1,4, 6

D. 2, 3, 6

B

20. The distal contact area of the permanent maxillary central incisor is located in the:

A. Incisal third.

B. Junction of the incisal and middle thirds.

C. Center of the middle third.

D. Junction of the middle and cervical thirds.

E. Cervical third.

B

17. The marginal ridges and cingulum of the permanent maxillary central incisor are —-than those of the permanent mandibular incisor.

A. Less prominent

B. More prominent

B

19. Viewed from the facial aspect, the mandibular lateral incisor is —mandibular central incisor.

A. Wider mesiodistally than the

B. Narrower mesiodistally than the

C. The same mesiodistal width as the

A

21. The distal contact area of the permanent maxillary lateral incisor is located in the:

A. Incisal third

B. Junction of the incisal and middle thirds C. Center of the middle third

D. Junction of the middle and cervical thirds

E. Cervical third

C

27. True or false? The maxillary lateral incisor is smaller than the maxillary central incisor in all dimensions except root length.

False

26. True or false? The mesial height of contour of the mandibular lateral incisor is closer to the incisal edge than the distal height of contour.

False

25. True or false? Compared to the maxillary incisor, the mandibular incisors have more prominent marginal ridges.

False

24. —are rounded incisal extensions of the labial lobes found on newly erupted or unworn permanent incisor teeth.

Mamelons

23. A distinguishing deeper root concavity on the mandibular lateral incisor is on the —-root surface.

distal root

22. Though smaller than the maxillary incisors, mandibular incisors also have—- (number of) lobes.

four