✨✨✨Dental Anatomy Chapter 4

1. All anterior teeth and two-cusped premolars form from how many lobes?

A. Two

B. Three

C. Four

D. Five

E. The number of lobes is not the same for all anterior teeth and two-cusped premolars.

C

2. Which tooth is most likely to have two roots?

A. Maxillary lateral incisor

B. Maxillary first premolar

C. Maxillary second premolar

D. Mandibular first premolar

E. Mandibular second premolar

B

3. Which premolars are most likely to have three cusps and a lingual groove?

A. Maxillary first

B. Maxillary second

C. Mandibular first

D. Mandibular second

E. Mandibular first and second

D

4. Which premolar has a nonfunctional lingual cusp?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar

C

5. Which of the following traits does NOT apply to the maxillary first premolar?

A. It usually has a mesial marginal ridge groove.

B. It has a mesial crown depression.

C. It has a greater cervical line curvature on the mesial than on the distal.

D. The lingual cusp tip is positioned or "bent" toward the mesial.

E. The mesial proximal contact is located more ceryically than is the distal proximal contact.

E

6. When the maxillary first premolar has more than one root, which description applies?

A. There are most often two roots: a mesial and a distal.

B. There are most often two roots: a facial and a lingual.

C. There are most often three roots: one facial and two lingual.

D. There are most often three roots: two facial and one lingual.

B

7. One permanent premolar has a pronounced concavity on the cervical part of the crown. Which premolar and which surface is this?

A. Mesial surface of the maxillary second premolar

B. Distal surface of the maxillary first premolar

C. Mesial surface of the maxillary first premolar

D. Mesial surface of the mandibular first premolar

E. Mesiolingual surface of the mandibular first premolar

C

8. When compared to other premolars, which of the following characteristics is unique to a mandibular first premolar?

A. The root is often bifurcated.

B. The distal cusp ridge is shorter than the mesial cusp ridge.

C. The lingual cusp is almost the same height as the facial cusp.

D. There is likely to be a mesiolingual groove crossing onto the mesiolingual surface.

E. The occlusal groove pattern is shaped like a "Y."

D

9. Which of the following characteristics is NOT true about a maxillary first premolar?

A. The crown has a mesial concavity.

B. The mesial marginal ridge has a mesial marginal groove.

C. The root is often bifurcated.

D. The lingual cusp has little function because it is so short.

E. The crown is most likely to have two cusps.

D

10. Which premolar usually has a mesial crown cavitation?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar (two-cusp type)

E. Mandibular second premolar (three-cusp type)

A

11. Which secondary (adult) tooth has the mesial cusp ridge of its buccal cusp longer than the distal cusp ridge?

A. Maxillary first premolar

B. Maxillary second premolar

C. Maxillary canine

D. Mandibular first premolar

E. Mandibular second premolar

A

12. Which characteristic applies to ALL types of premolars?

A. All have two cusps.

B. All have a buccal cusp with the mesial cusp ridge shorter than the distal cusp ridge.

C. All have the mesial proximal contact area located more occlusally than the distal contact area.

D. All have only two occlusal pits (mesial and distal).

E. All have the buccal crest of curvature more cervical than the lingual crest of curvature.

E

13. Which trait applies to all premolars and all anterior teeth?

A. Have one root

B. Have the cervical line more curved (toward the incisal) on the distal than on the mesial

C. Are formed from four lobes

D. Have two marginal ridges

E. Have a deeper root depression on the mesial of the root

D

14. Which type of premolar is most likely to have separate mesial and distal pits with a pronounced transverse ridge

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar (two-cusp type)

E. Mandibular second premolar (three-cusp type)

C

15. Which premolar is most likely to have three cusps?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar

E. No premolar is likely to have three eusps.

D

16. If a mandibular second premolar has three cusps, what are they called?

A. Mesiobuccal, distobuccal, and lingual

B. Buccal, lingual, and distolingual

C. Mesiolingual, distolingual, and buccal

D. Distolingual, distobuccal, and buccal

E. Mesiobuccal distobuccal, and buccal

C

17. Which premolar has a mesial root depression (cavitation) deeper than the distal root depression?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar

A

18. When viewing the outline of a mandibular first premolar from occlusal, which location (or "corner") is more likely to be flatter in outline (less convex)?

A. Mesiobuccal

B. Distobuccal

C. Mesiolingual

D. Distolingual

C

19. When viewed from the facial, what is the geometric shape of a premolar?

A. Triangular (wedge) shaped

B. Rectangular shaped

C. Pentagon shaped

D. Square shaped

E. Rhomboid shaped

C

***20. Which premolar (if any) is most likely to have three cusps: one buccal and two lingual?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar

E. No premolar is likely to have two lingual cusps and one buccal cusp.

D

21. Which premolar (if any) normally has the mesial cusp ridge of its buccal cusp longer than the distal cusp ridge?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar

E. No premolar normally has this trait.

A

22. Which tooth (if any) exhibits MORE cervical line curvature on the distal aspect than on the mesial aspect?

A. Maxillary central incisor

B. Mandibular canine

C. Mandibular first premolar

D. Maxillary first premolar

E. None of these teeth have the cervical line curvature more on the distal aspect than on the mesial aspect.

E

23. Which premolar has two major cusps almost the same size and length?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar (two-cusp type)

E. Mandibular second premolar (three-cusp type)

B

24. When holding an extracted maxillary and mandibular premolar from the same mouth, which trait (if any) can be used to distinguish the maxillary premolar from the mandibular premolar?

A. The occlusal outlines of maxillary premolars are more obviously wider faciolingually than mesiodistally.

B. Maxillary premolars have relatively short, sometimes functionless, lingual cusps.

C. Maxillary premolars tip considerably toward the lingual relative to the long axis of the root.

D. Maxillary premolars are most likely to have lingual or mesiolingual grooves.

E. None of these traits can be used to distinguish maxillary from mandibular premolars.

A

25. Which premolar is likely to be wider mesiodistally in the lingual half versus in the facial half (that is, taper narrower from lingual to facial)?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar (two-cusp type)

E. Mandibular second premolar (three-cusp type)

E

26. Which premolars (if any) are most likely to have the lingual cusp much shorter than the buccal cusp, and have a mesiolingual groove?

A. Maxillary first premolar only

B. Mandibular first premolar only

C. Mandibular second premolar only

D. Both maxillary first and second premolars

E. No premolar has both of these characteristics.

B

27. Which tooth is most likely to have a prominent lingual ridge separating two lingual fossae?

A. Maxillary canine

B. Mandibular canine

C. Maxillary central incisor

D. Mandibular second premolar

E. Mandibular lateral incisor

A

28. Which posterior tooth is MOST likely to have a mesial longitudinal root depression more prominent than the distal root depression?

A. Mandibular second premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Maxillary first premolar

D

29. Which of the following adult teeth most often form from five lobes, but has only one root and three pulp horns?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar (two-cusp type)

E. Mandibular second premolar (three-cusp type)

E

30. Which of the following teeth is most likely to have a central fossa and a lingual groove?

A. Mandibular first premolar

B. Maxillary first premolar

C. Maxillary second premolar

D. Mandibular second premolar

E. Maxillary canine

D

31. Which four ridges join at the facial cusp tip of premolars?

A. Mesial cusp ridge, distal cusp ridge, lingual, and buccal

B. Mesial marginal ridge, distal marginal ridge, lingual, and buccal

C. Mesial cusp ridge, distal cusp ridge, triangular, and buccal

D. Mesial cusp ridge, distal cusp ridge, triangular, and cervical

C

32. Compared to a maxillary first premolar, a maxillary second premolar is most likely to exhibit:

A. Mesial crown cavitation

B. A shorter central groove

C. A more asymmetrical crown

D. Fewer supplemental grooves

E. A mesial marginal ridge groove

B

33. Which ridge does NOT help form the perimeter (outline) of the occlusal surface (table) of a two-cusped premolar?

A. Mesial marginal ridge

B. Distal marginal ridge

C. Mesial cusp ridge of the buccal cusp

D. Distal cusp ridge of the lingual cusp

E. Triangular ridge of the buccal cusp

E

34. When viewed from the proximal, which teeth are more likely to exhibit a lingual tilt of the crown relative to the root?

A. Maxillary premolars

B. Mandibular premolars

C. Maxillary canines

D. Maxillary lateral incisors

E. Maxillary central incisors

B

35. Which of the following permanent teeth has a mesial marginal ridge more cervical than the distal marginal ridge?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar

E. Maxillary canine

C

36. On the maxillary first premolar, the mesial marginal ridge is interrupted just lingual to its midpoint by the ———,which crosses the marginal ridge from the occlusal surface forming a distinct notch.

A. Buccal groove

B. Central groove

C. Lingual groove

D. Mesiolingual groove

E. Mesial marginal developmental groove

E

37. Which tooth would merit special concern in preparing and forming the mesial contour of a mesial cavity for a filling (restoration)?

A. Maxillary first molar

B. Mandibular first molar

C. Maxillary second molar

D. Maxillary first premolar

E. Mandibular second molar

D

38. From the proximal view, which premolar most closely resembles a canine?

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar

C

39. When considering all premolars, which cusp is least developed?

A. Lingual cusp of the mandibular second premolar

B. Facial cusp of the mandibular first premolar

C. Lingual cusp of the mandibular first premolar

D. Facial cusp of the maxillary first premolar

C

40. A Y-shaped occlusal groove pattern is characteristic of a:

A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Mandibular second premolar

D

54. True or false? Multiple supplementary grooves often radiate from the central groove of a maxillary second premolar.

True

53. True or false? When viewed from the buccal aspect, the mesial slope of the buccal cusp ridge of the maxillary second premolar is usually longer than the distal slope.

False

52. True or false? The lingual cusps of the maxillary first premolar and the mandibular first premolar are shorter occlusocervically than the buccal cusps.

True

51. True or false? When viewed from the mesial or distal, the occlusal surface of the mandibular first premolar is perpendicular to the long axis of the tooth.

False

50. True or false? The occlusal table of the mandibular first premolar is rectangular in shape.

False

49. True or false? The central groove of the maxillary first premolar is relatively short in a mesiodistal direction.

False

48. True or false? The mesial height of contour on a maxillary first premolar is found at the junction of the occlusal and middle third.

False

47. An imaginary line between the cusp tips of the mandibular first premolar would form an angle of approximately —- with the long axis of the tooth.

45

46. The maxillary— premolar has a tendency to have supplemental or additional small occlusal grooves extending out from the central groove.

Second

45. The only single-rooted tooth to have three cusps is the——-

mandibular second premolar

***44. The mandibular second premolar often exhibits a linear depression extending lingually from the central pit, separating the two lingual cuspsAps: This linear depression is known as the—-

lingual groove

43. The transverse ridge extends as a continuous elevation in a buccolingual direction to unite the ——of the buccal and lingual cusps of a mandibular first premolar.

triangular ridges

41. The occlusal outline of a maxillary first premolar can be considered—- (geometric form).

hexagonal or rectangular

42. The cusp ridges and the —-ridges make up the exterior boundary of the occlusal table.

marginal