✨✨Chapter 5 morph

1. When holding any extracted permanent maxillary and mandibular molar from the same mouth, which trait (if any) can be used to distinguish a maxillary molar from a mandibular molar?

A. The occlusal outline of a maxillary molar is wider mesiodistally, than faciolingually,

B. Maxillary molars tip considerably toward the lingual relative to the long axis of the root.

C. Maxillary molars have more divergent roots (roots are more spread out) toward the apex.

D. Maxillary molars have three roots.

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

D

2. Which two types of permanent teeth are most likely to be wider mesiodistally in the lingual half versus in the facial half (that is, taper narrower from lingual toward facial)?

A. Maxillary first premolars and maxillary first molars

B. Maxillary second premolars and.mandibular second molars (three-cusp type)

C. Mandibular first premolars and maxillary second molars

D. Mandibular second premolars (three-cusp type) and maxillary first molars

E. Maxillary second premolars and maxillary second molars (four-cusp type)

D

3. Which of the following bumps or ridges is NOT likely to be found on a permanent mandibular first molar?

A. Triangular ridge of the mesiolingual cusp

B. Mesial cusp ridge of the distal cusp

C. Mesial marginal ridge

D. Transverse ridge

E. Oblique ridge

E

4. Where are furcations located on the roots of maxillary molars?

A. In the middle third (mesiodistally) of the facial and lingual surfaces

B. Near the apical third of the mesial and distal surfaces

C. On the mesial, distal, and lingual surfaces

D. On the facial, distal, and lingual surfaces

E. On the facial, mesial, and distal surfaces

E

5. Which permanent tooth is likely to have its mesial proximal contact positioned more cervically than its distal?

A. Maxillary lateral incisor

B. Mandibular first molar

C. Mandibular first premolar

D. Maxillary first premolar

E. Mandibular canine

C

6. Which of the following is NOT a trait of third molars?

A. Occlusal surfaces have many supplemental grooves and ridges.

B. Roots are frequently fused or bent.

C. The occlusal surface area is smaller on third molars than on first or seconds.

D. Root trunks are very short.

E. Third molars exhibit considerable variation in size and shape.

D

7. Where are furcations located on the roots of permanent mandibular molars? A. Near the middle (mesiodistally) of the facial and lingual surfaces

B. Near the middle (buccolingually) of the mesial and distal surfaces

C. On the mesial, distal, and lingual surfaces

D. On the facial, distal, and lingual surfaces

E. On the facial, mesial, and distal surfaces

A

8. Which permanent molar is most likely to have five cusps and three roots?

A. Maxillary first molar

B. Maxillary second molar

C. Mandibular first molar

D. Mandibular second molar

A

9. Which of the following grooves is NOT likely to be found on any permanent maxillary first molar?

A. Mesiodistal groove

B. Central groove

C. Lingual groove

D. Transverse groove of the oblique ridge

A

10. Which statement is true regarding the proportions and shape of the crown of a permanent mandibular first molar?

A. The crown is wider buccolingually than mesiodistally,

B. The crown is wider mesiodistally than occlusocervically.

C. The crown is wider huccolingually in the distal half than in the mesial half.

D. The crown is longer occlusoceryically on the distal third than in the mesial third. E. The crown is wedge shaped from the proximal view.

B

11. Which trait CANNOT be used to distinguish the mesial from the distal surface on a permanent mandibular molar?

A. The distobuccal cusp is shorter than the mesigbuccal cusp.

B. If there are three buccal cusps, the distal cusp is shorter and smaller than the distobuccal cusp.

C. Mandibular second molars are wider huccolingually in the mesial half compared to the distal half.

D. The buccal crest of curvature (height of contour) is more cervical than the lingual crest of curvature.

E. The longest cusp is the mesiolingual cusp.

D

12. Which permanent teeth are most likely to have three cusps and three roots

A. Mandibular first premolars

B. Mandibular second premolars

C. Maxillary first molars (without a cusp of Carabelli)

D. Maxillary second molars

E. Maxillary second molars if you include the cusp of Carabelli

D

13. Which two permanent molars are most likely to have five cusps?

A. Maxillary first and second molars

B. Mandibular first and second molars

C. Maxillary first and mandibular first molars

D. Mandibular second and maxillary second molars

E. Maxillary first and mandibular second molars

C

14. Which cusp is present on most permanent mandibular first molars but is usually NOT present on mandibular second molars?

A. Mesiobuccal

B. Distobuccal

C. Mesiolingual

D. Mesial

E. Distal

E

15. Which tooth (using the Universal numbers) is most likely to be the longest tooth in the mouth?

A. #6

B. #8

C. #14

D. #9

E. #27

A

16. Which of the following permanent teeth normally have the facial crest of curvature in the cervical third?

A. Incisors and canines only

B. Canines only

C. Incisors only

D. All premolars and anterior teeth only

E. All teeth

E

17. Which of the following teeth are most likely to have three roots?

A. Maxillary first premolars and mandibular molars

B. Mandibular molars and maxillary first molars

C. Maxillary first molars and maxillary second molars

D. Maxillary first molars and mandibular first molars

E. All maxillary and mandibular molars

C

18. Which permanent posterior tooth is LEAST likely to have a longitudinal root depression on both the mesial and distal surfaces?

A. Mandibular second premolar

B. Maxillary second premolar

C. Mandibular first premolar

D. Maxillary first premolar

E. Mandibular first molar; mesial root

A

19. The cusp of Carabelli is located on which cusp of the maxillary first molar?

A. Distal

B. Mesiobuccal

C. Distobuccal

D. Distolingual

E. Mesiolingual

E

20. What are the locations of furcations on the root of a permanent mandibular molar?

A. Midbuccal, distal, and mesial (more toward the lingual)

B. Midlingual, distal, and mesial (more toward the buccal)

C. Midbuccal and midmesial

D. Midmesial and mid-distal

E. Midbuccal and midlingual

E

21. Of the following, which cusp is the smallest cusp on permanent maxillary molars?

A. Mesiobuccal

B. Distobuccal

C. Mesiolingual

D. Distolingual

E. Distal

D

22. On a permanent maxillary molar, the root depression on the lingual root is located on which surface(s)?

A. Buccal

B. Lingual

C. Mesial

D. Distal

E. Mesial and distal

B

23. Which of the following traits can be used to distinguish permanent maxillary first molars from maxillary second molars?

A. The maxillary first molars have roots that are less spread out.

B. The maxillary first molars have furcation locations that are farther from the cervical line.

C. Only the maxillary first molars are narrower (mesiodistally) on their lingual half than on their buccal half.

D. Only the maxillary first molars have an oblique ridge.

E. Only the maxillary first molars are likely to have five cusps.

E

24. Which of the following tooth crowns are likely to be wider mesiodistally, than faciolingually?

A. #13

B. #3

C. #27

D. #23

E. #8

E

25. Permanent third molars differ from other permanent molars since third molars usually:

A. Have more numerous supplemental grooves and are smaller

B. Have fewer supplemental grooves and are smaller

C. Have more numerous supplemental grooves and are larger

D. Have fewer supplemental grooves and are larger

A

26. When viewing the occlusal or incisal surfaces, which of the following permanent teeth is most likely to have a mesiodistal measurement greater in the lingual half than in the facial half?

A. Maxillary canine

B. Maxillary first molar

C. Mandibular first molar

D. Maxillary first premolar

E. Mandibular first premolar

B

27. Which of the following permanent tooth crowns is likely to be wider mesiodistally than faciolingually?

A. Maxillary second premolar

B. Maxillary first molar

C. Mandibular canine

D. Mandibular lateral incisor

E. Maxillary central incisor

E

28. From which view is only one root visible on an extracted mandibular first molar?

A. Mesial

B. Distal

C. Buccal

D. Lingual

E. Apical

A

29. Which cusp is the largest and longest on a permanent maxillary second molar? A. Mesiobuccal

B. Mesiolingual

C. Distobuccal

D. Distolingual

E. Cusp of Carabelli

B

30. Which tooth is LEAST likely to have furcation involvement (a furcation that can be probed after bone loss) due to severe bone loss?

A. Maxillary first premolar

B. Maxillary second molar

C. Mandibular third molar

D. Mandibular first premolar

E. Maxillary first molar

D

31. Which adult teeth are most commonly missing (never form)?

A. Maxillary lateral incisors

B. Second molars

C. Maxillary first premolars

D. Mandibular first premolars

E. Third molars (especially maxillary)

E

32. If a permanent maxillary second molar has only three cusps, what are the three cusps 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

A

33. Which statement is true regarding the proportions and shape of the crown of a permanent maxillary first molar?

A. The crown is wider buccolingually than mesiodistally,

B. The crown is wider ocelusocervically than mesiodistally.

C. The crown is wider buccolingually in the distal half than in the mesial half.

D. The crown is longer occlusocervically on the distal half than in the mesial half.

E. The crown is wedge shaped from the proximal view.

A

34. Which permanent tooth outline may be thought of as diamond shaped when viewed from the occlusal, with its mesiolingual "corner" or line angle flattened (or pushed in)?

A. Mandibular first premolar

B. Mandibular second premolar

C. Maxillary first molar (without the cusp of Carabelli)

D. Maxillary second molar

E. Maxillary second molar if you include the cusp of Carabelli

A

35. Which two cusps have a triangular ridge and distal cusp ridge (or two triangular ridges) that join together to form an oblique ridge?

A. Mesiobuccal and mesiolingual

B. Distobuccal and distolingual

C. Mesiobuccal and distolingual

D. Distobuccal and mesiolingual

E. Mesiolingual and distolingual

D

36. Which maxillary molar root is longest? A. Mesiobuccal

B. Mesial

C. Distobuccal

D. Distal

E. Lingual

E

37. When viewed from the occlusal, how do you describe the location of the proximal contacts (crests of curvature) for permanent molars?

A. Contacts are located in the occlusal third.

B. Contacts are located in the exact middle of the tooth buccolingually,

C. Contacts are located in the exact middle of the tooth occlusogingiyally.

D. Contacts are located in the buccal half of the tooth.

E. Contacts are located in the lingual half of the tooth.

D

38. Where would you probe to determine if the presence of periodontal disease resulted in bone loss that exposed the furcations on the root of a permanent mandibular first molar?

A. Midbuccal, distal, and mesial (more toward the lingual)

B. Midlingual, distal, and mesial (more toward the buccal)

C. Midbuccal and midmesial

D. Midmesial and middistal

E. Midbuccal and midlingual

E

39. Which permanent molars are often formed from five lobes?

A. Both first and second maxillary molars

B. Both maxillary and mandibular first molars

C. Both maxillary and mandibular second molars

D. Both first and second mandibular molars

E. Third molars

B

40. Which of the following teeth are most likely to have two roots?

A. Maxillary first premolars and mandibular molars

B. Mandibular molars and maxillary first molars

C. Maxillary first molars and maxillary second molars

D. Mandibular first molars and mandibular first premolars

E. All mandibular molars and maxillary premolars

A

41. Which trait(s) can be used to distinguish permanent maxillary first molars from maxillary second molars? (Read all choices.)

A. Maxillary first molars often have a cusp of Carabelli on the mesiolingual cusp.

B. Maxillary first molars have a shorter root trunk than second molars.

C. Maxillary first molars have a larger distolingual cusp than second molars.

D. Maxillary first molars often have a cusp of Carabelli on the mesiolingual cusp, and maxillary first molars have a shorter root trunk than second molars.

E. Maxillary first molars often have a cusp of Carabelli on the mesiolingual cusp, maxillary first molars have a shorter root trunk than second molars, and maxillary first molars have a larger distolingual cusp than second molars.

E

42. Which cusp is the largest and tallest cusp on permanent maxillary first molars? A. Mesiobuccal

B. Distobuccal

C. Mesiolingual

D. Distolingual

E. Distal

C

43. Which permanent tooth has an occlusal outline that is rhomboid shaped? A. Maxillary second molar

B. Mandibular first molar

C. Mandibular second molar

D. Mandibular second premolar (three-cusp type)

E. Mandibular first premolar

A

44. The occlusal geometric configuration (outline) of a permanent mandibular first molar is:

A. Hexagonal

B. Pentagonal

C. Rhomboidal

D. Trapezoid

E. Triangular

B

45. On a permanent maxillary molar, what is the name of the ridge formed by the union of the distal cusp ridge of the mesiolingual cusp and the triangular ridge of the distofacial cusp?

A. Cuspal

B. Central

C. Marginal

D. Oblique

E. Transverse

D

46. The height of contour on the facial surface of a permanent mandibular first molar is located:

A. In the cervical third

B. In the middle third

C. At the junction of cervical and middle third

A

47. The transverse groove of the oblique ridge of a permanent maxillary molar connects which of the following pits?

A. Distal and distofacial

B. Central and facial

C. Central and distal

D. Central and mesial

C

48. The permanent mandibular second molar differs from the permanent mandibular first molar in number of:

A. Cusps

B. Roots

C. Lingual grooves

D. Marginal ridges

A

49. The greatest faciolingual dimension of a permanent mandibular second molar is located in the:

A. Distal third of the crown

B. Mesial third of the crown

C. Middle third of the crown

B

50. When viewed from the buccal, the distal contact area of the permanent maxillary first molar is located approximately at the —of the crown.

A. Cervical third

B. Middle of the middle third

C. Junction of the occlusal and middle thirds

D. Junction of the middle and cervical thirds

B

51. The occlusal aspect of a permanent maxillary first molar contains two obtuse and two acute angles. The obtuse angles are:

A. Mesiolingual and distolingual

B. Mesiofacial and distolingual

C. Mesiolingual and distofacial

D. Mesiofacial and distofacial

E. Distofacial and distolingual

C

52. Many supplemental grooves on the occlusal surface are a common characteristic of the permanent mandibular— molar.

A. First

B. Second

C. Third

C

53. A "+" groove pattern on the occlusal surface identifies the tooth as the:

A. Maxillary first permanent molar

B. Maxillary second permanent molar

C. Mandibular first permanent molar

D. Mandibular second permanent molar E. Maxillary third permanent molar

D

54. The occlusal outline of maxillary third molars may be described as heart shaped due to the frequently missing —cusp.

distolingual

55. There are three occlusal pits on a mandibular second molar and they are named mesial, —and distal.

central

57. The occlusal outline of a mandibular first molar may be described as having a —shape (geometrical form)

pentagonal

56. The mesial height of contour of the mandibular first molar is located at the junction of the occlusal and middle third of the crown and the distal height of contour is located within the —third.

middle

58. Name the two grooves found on the buccal surface of the mandibular first mölars. mesiobuccal and—

distobuccal

59. The —cusp of the maxillary first molar is the largest cusp.

mesiolingual

60. The longest root of a permanent maxillary first molar is the—

lingual

61. The furcation of the mandibular molars may be seen from either a —or lingual view.

buccal

62. An elevation uniting the triangular ridges of the mesiobuccal cusp and the mesiolingual cusp of a permanent mandibular first molar is called the —

transverse ridge

63. The intersection of the buccal, lingual, and central grooves of a permanent mandibular second molar forms a distinct—- shape on the occlusal surface.

cross (or +)

64. A synonym for the lingual root of the maxillary molars is the —root.

palatal

65. For what dental term(s) is the following definition: "A fifth cusp, found on the lingual surface of the mesiolingual cusp of # 3 and #14"?—

cusp of Carabelli

66. The widest of all permanent teeth in a buccolingual direction is the—

maxillary first molar ridge crossing

67. True or false? A prominent ridge crossing the occlusal surface of the permanent maxillary first and second molar, unique to these teeth, is called the oblique ridge.

False

68. True or false? The lingual root of the permanent maxillary first molar frequently presents a distal curvature at the apical third of the root.

False

69. True or false? Relative to the total root length, the root trunk of a permanent maxillary second molar is greater than that of a maxillary first molar.

False

70. True or false? The permanent mandibular first molar often has a distal cusp.

False

71. True or false? The cervicoapical dimension of the root trunk of the permanent mandibular second molar is relatively longer than that of the mandibular first molar.

False

72. True or false? The point of trifurcation on the permanent maxillary first molar is situated closer to the cementoenameljunction than on the maxillary third molar.

False

73. True or false? The most frequently missing cusp of a maxillary second molar is the distobuccal cusp.

False

74. True or false? Mandibular molars are the widest teeth buccolingually.

False

75. True or false? The faciolingual dimension of a permanent maxillary molar is greater than its mesiodistal dimension.

False

76. True or false? The permanent maxillary first molar primary cusp triangle is composed of the mesiobuccal, mesiolingual, and distobuccal cusps.

False

77. True or false? Permanent mandibular molar crowns are broader from mesial to distal than facial to lingual.

False

78. True or false? The buccal aspect of the permanent mandibular first molar most often has only one developmental groove.

False