Quizlet (Ver. 2) - Ch. 1 Tooth Anatomy

1. What is dentition?

A. The supporting bone of the teeth

B. All of the teeth in the mouth together

C. The arrangement of only permanent teeth

D. The gingival tissue surrounding the teeth

B. All of the teeth in the mouth together

2. What is the maxillary arch?

A. Lower jaw; movable

B. Upper jaw; does not move

C. Lower jaw; does not move

D. Upper jaw; movable

B. Upper jaw; does not move

3. What is the mandibular arch?

A. Upper jaw; movable

B. Upper jaw; does not move

C. Lower jaw; movable

D. Lower jaw; does not move

C. Lower jaw; movable

4. How many teeth are in the complete permanent dentition?

A. 20

B. 24

C. 28

D. 32

D. 32

5. What is enamel?

A. Soft tissue inside a tooth

B. White protective external layer of the anatomic crown

C. Yellow layer covering the root

D. Bone surrounding the root

B. White protective external layer of the anatomic crown

6. What is cementum?

A. White layer covering the crown

B. Soft tissue containing nerves

C. Dull yellow external layer of the anatomic root

D. Hard tissue making up most of the crown

C. Dull yellow external layer of the anatomic root

7. What is the cementoenamel junction (CEJ)?

A. Junction of pulp and dentin

B. Junction of enamel and cementum

C. Junction of cementum and alveolar bone

D. Junction of dentin and enamel

B. Junction of enamel and cementum

8. What is dentin?

A. Hard yellowish tissue making up most of the tooth

B. Soft tissue containing blood vessels

C. Outer covering of the root

D. Outer covering of the crown

A. Hard yellowish tissue making up most of the tooth

9. What is the dentinoenamel junction (DEJ)?

A. Junction between cementum and dentin

B. Junction between enamel and cementum

C. Junction between dentin and enamel

D. Junction between pulp and dentin

C. Junction between dentin and enamel

10. What is the cementodentinal junction?

A. Where cementum joins dentin

B. Where enamel joins cementum

C. Where pulp joins dentin

D. Where bone joins cementum

A. Where cementum joins dentin

11. What is pulp?

A. Mineralized outer layer

B. Soft tissue containing nerves and blood vessels

C. Hard yellow tissue

D. Gingival tissue

B. Soft tissue containing nerves and blood vessels

12. What is the pulp chamber?

A. Root portion of cementum

B. Coronal portion of the pulp cavity

C. Opening at the root apex

D. Space between gingiva and tooth

B. Coronal portion of the pulp cavity

13. What is the root canal?

A. Portion of the pulp cavity extending into the root

B. Junction between enamel and dentin

C. Space surrounding the root

D. Opening at the crown

A. Portion of the pulp cavity extending into the root

14. What is the apical foramen?

A. Groove on the crown

B. Opening at the root tip where nerves and blood vessels enter

C. Depression on the occlusal surface

D. Junction between crown and root

B. Opening at the root tip where nerves and blood vessels enter

15. What is the periodontium?

A. Structures surrounding, supporting, and attaching to the teeth

B. Only the gingiva

C. Only the alveolar bone

D. Tissues inside the tooth

A. Structures surrounding, supporting, and attaching to the teeth

16. What is alveolar bone?

A. Bone inside the crown

B. Bone surrounding the roots of the teeth

C. Tissue inside the pulp chamber

D. Outer root covering

B. Bone surrounding the roots of the teeth

17. What is gingiva?

A. Hard tooth tissue

B. Soft tissue covering the alveolar bone of the jaws

C. Tissue inside the pulp chamber

D. Bone surrounding the root

B. Soft tissue covering the alveolar bone of the jaws

18. What is attached gingiva?

A. Gingiva tightly attached to underlying bone

B. Gingiva that surrounds but does not attach to the tooth

C. Space between tooth and gingiva

D. Gingiva covering the crown

A. Gingiva tightly attached to underlying bone

19. What is free gingiva?

A. Gingiva firmly bound to bone

B. Collar of gingiva around the tooth that is not attached to it

C. Bone surrounding the tooth

D. Pulp tissue near the crown

B. Collar of gingiva around the tooth that is not attached to it

20. What is the gingival sulcus?

A. Space between free gingiva and the tooth

B. Space inside the pulp chamber

C. Groove between cusps

D. Space between two roots

A. Space between free gingiva and the tooth

21. What is the gingival margin?

A. Root apex

B. Edge of the gingiva nearest the incisal or occlusal surface

C. Cementoenamel junction

D. Center of the gingiva

B. Edge of the gingiva nearest the incisal or occlusal surface

22. What is the clinical crown?

A. Portion covered by enamel

B. Portion visible in the oral cavity

C. Portion below the CEJ

D. Entire root

B. Portion visible in the oral cavity

23. What is the clinical root?

A. Portion of the tooth not visible because of gingival coverage

B. Portion covered with enamel

C. Entire anatomic root only

D. Occlusal portion of the crown

A. Portion of the tooth not visible because of gingival coverage

24. What is the anatomic crown?

A. Portion visible in the mouth

B. Portion covered by cementum

C. Portion covered by enamel

D. Portion beneath gingiva

C. Portion covered by enamel

25. What is the labial surface?

A. Surface toward the tongue

B. Facial surface toward the lips

C. Surface toward the midline

D. Biting surface

B. Facial surface toward the lips

26. What is the lingual surface?

A. Surface facing the tongue

B. Surface facing the lips

C. Surface facing the cheek

D. Surface facing the midline

A. Surface facing the tongue

27. What is the palatal surface?

A. Facial surface of mandibular teeth

B. Lingual surface of maxillary teeth

C. Occlusal surface of molars

D. Distal surface of anterior teeth

B. Lingual surface of maxillary teeth

28. Which teeth are anterior teeth?

A. Premolars and molars

B. Incisors and canines

C. Canines and premolars

D. Incisors and molars

B. Incisors and canines

29. What is the incisal edge?

A. Chewing surface of molars

B. Cutting edge of anterior teeth

C. Root tip

D. Cervical bulge

B. Cutting edge of anterior teeth

30. What is a proximal surface?

A. Surface facing the tongue

B. Surface next to an adjacent tooth

C. Facial surface

D. Biting surface

B. Surface next to an adjacent tooth

31. What does mesial mean?

A. Away from the midline

B. Toward the midline

C. Toward the root

D. Toward the cheek

B. Toward the midline

32. What does distal mean?

A. Toward the midline

B. Away from the midline

C. Toward the tongue

D. Toward the crown

B. Away from the midline

33. What does incisocervical dimension describe?

A. Mesial-to-distal width

B. Facial-to-lingual width

C. Distance from incisal edge toward cervical line

D. Root width

C. Distance from incisal edge toward cervical line

34. Which tooth has the shortest root-to-crown ratio?

A. Maxillary central incisor

B. Maxillary canine

C. Mandibular canine

D. Maxillary first molar

A. Maxillary central incisor

35. How many triangular ridges form a transverse ridge?

A. One

B. Two

C. Three

D. Four

B. Two

36. What are marginal ridges?

A. Ridges forming mesial and distal borders of tooth surfaces

B. Grooves between cusps

C. Depressions near the center of a tooth

D. Root prominences

A. Ridges forming mesial and distal borders of tooth surfaces

37. What is the buccal cervical ridge?

A. Groove in the root

B. Greatest bulge in the cervical third of the buccal surface

C. Depression on the lingual surface

D. Ridge at the incisal edge

B. Greatest bulge in the cervical third of the buccal surface

38. Where is the facial height of contour of all teeth when viewed proximally?

A. Incisal third

B. Middle third

C. Cervical third

D. Occlusal third

C. Cervical third

39. What is a fossa?

A. Raised linear area

B. Depression in a tooth surface

C. Root opening

D. Gingival space

B. Depression in a tooth surface

40. What are mamelons?

A. Grooves on molars

B. Three rounded bulges on newly erupted incisors

C. Root depressions

D. Gingival elevations

B. Three rounded bulges on newly erupted incisors

41. What lies between the buccal and lingual cusps of a two-cusped premolar?
A. Cingulum

B. Sulcus

C. Mamelon

D. CEJ

B. Sulcus

42. Where is the greatest cervical-line curvature found?

A. Distal of mandibular canine

B. Mesial of maxillary incisor

C. Buccal of maxillary molar

D. Lingual of mandibular incisor

B. Mesial of maxillary incisor

43. What is the interproximal space?

A. Space inside pulp

B. Space bounded by proximal surfaces of adjacent teeth

C. Space between cusps

D. Space between crown and gingiva

B. Space bounded by proximal surfaces of adjacent teeth

44. In Class I molar occlusion, the mesiobuccal cusp of the maxillary first molar aligns with the:

A. Lingual groove of mandibular first molar

B. Buccal groove of mandibular first molar

C. Distal groove of maxillary molar

D. Central fossa of maxillary molar

B. Buccal groove of mandibular first molar

45. What is the key factor used to determine Class I occlusion?

A. Relationship of central incisors

B. Relationship of first molars

C. Number of premolars

D. Position of canines

B. Relationship of first molars

46. How many developmental lobes form anterior teeth?

A. 2

B. 3

C. 4

D. 5

C. 4

47. Each cusp of a molar develops from how many lobes?

A. 1

B. 2

C. 3

D. 4

A. 1

48. Which Universal numbers are the permanent central incisors?

A. 6, 11, 22, 27

B. 7, 10, 23, 26

C. 8, 9, 24, 25

D. 5, 12, 21, 28

C. 8, 9, 24, 25

49. Which Universal numbers are the permanent lateral incisors?

A. 7, 10, 23, 26

B. 8, 9, 24, 25

C. 6, 11, 22, 27

D. 5, 12, 21, 28

A. 7, 10, 23, 26

50. What are facets?

A. Developmental grooves

B. Wear patterns on tooth surfaces

C. Root canals

D. Gingival depressions

B. Wear patterns on tooth surfaces

51. Anterior marginal ridges converge toward the:

A. Incisal edge

B. Cingulum

C. Root apex

D. Facial ridge

B. Cingulum

52. Incisor roots most commonly bend toward the:

A. Mesial

B. Distal

C. Facial

D. Lingual

B. Distal

53. How many teeth in a complete adult dentition have a labial surface?

A. 8

B. 10

C. 12

D. 16

C. 12

54. How many total molars are in the complete adult dentition?

A. 8

B. 10

C. 12

D. 16

C. 12

55. How many facial lobes correspond to the mamelons of an incisor?

A. 2

B. 3

C. 4

D. 5

B. 3

56. Which ridges form the mesial and distal borders of anterior lingual and posterior occlusal surfaces?

A. Triangular ridges

B. Marginal ridges

C. Transverse ridges

D. Oblique ridges

B. Marginal ridges

57. Which incisor is the exception to the usual more-square mesioincisal and more-rounded distoincisal angles?

A. Maxillary central

B. Maxillary lateral

C. Mandibular central

D. Mandibular lateral

C. Mandibular central

58. Which contact of the mandibular lateral incisor is closer to the incisal edge?

A. Mesial

B. Distal

C. Facial

D. Lingual

A. Mesial

***59. How many teeth are in a full permanent dentition?

A. 20

B. 28

C. 30

D. 32

D. 32

60. How many permanent teeth are in each arch?

A. 8

B. 10

C. 16

D. 20

C. 16

61. How many permanent teeth are in each quadrant?

A. 5

B. 8

C. 10

D. 16

B. 8

62. Which tooth-numbering system uses numbers 1–32 for permanent teeth?

A. Palmer

B. International

C. Universal

D. Primary lettering

C. Universal

63. What are the four tissues of a tooth?

A. Enamel, dentin, cementum, pulp

B. Enamel, gingiva, bone, pulp

C. Dentin, ligament, bone, pulp

D. Enamel, cementum, gingiva, bone

A. Enamel, dentin, cementum, pulp

64. Which structure anchors/supports a tooth in alveolar bone?

A. Gingival sulcus

B. Periodontal ligament

C. Enamel

D. Pulp chamber

B. Periodontal ligament

65. Which are the four structures of the periodontium?

A. Gingiva, cementum, periodontal ligament, alveolar bone

B. Enamel, dentin, pulp, cementum

C. Pulp, bone, dentin, ligament

D. Enamel, gingiva, cementum, pulp

A. Gingiva, cementum, periodontal ligament, alveolar bone

66. On a maxillary canine, how do the cusp ridges compare?

A. Mesial is longer than distal

B. Mesial is shorter than distal

C. They are always equal

D. Distal is absent

B. Mesial is shorter than distal

67. Which teeth develop from four lobes: three labial and one lingual?

A. Premolars only

B. Incisors and canines

C. Molars only

D. Canines and molars

B. Incisors and canines

68. Which ridge is formed by two triangular ridges meeting buccolingually?

A. Marginal ridge

B. Transverse ridge

C. Oblique ridge

D. Cervical ridge

B. Transverse ridge

69. Which is a major function of incisors?

A. Grinding food

B. Cutting food

C. Crushing food only

D. Supporting roots

B. Cutting food

70. What is a mamelon?

A. Depression in the root

B. Rounded prominence on the incisal edge of a newly erupted incisor

C. Groove between molar cusps

D. Ridge on the root

B. Rounded prominence on the incisal edge of a newly erupted incisor

71. Which permanent tooth is considered highly symmetrical?

A. Maxillary central incisor

B. Mandibular central incisor

C. Maxillary canine

D. Mandibular lateral incisor

B. Mandibular central incisor

72. Where is the facial height of contour on anterior teeth?

A. Incisal third

B. Middle third

C. Cervical third

D. Root third

C. Cervical third

73. Where are the heights of contour on posterior teeth?

A. Buccal middle; lingual cervical

B. Buccal cervical; lingual middle

C. Both cervical

D. Both middle

B. Buccal cervical; lingual middle

74. Which sequence correctly lists root landmarks?

A. Apex → furcation → trunk → cervix

B. Cervix → trunk → furcation → apex

C. Cervix → apex → trunk → furcation

D. Trunk → cervix → apex → furcation

B. Cervix → trunk → furcation → apex

75. What is a function of the cingulum?

A. Forms the root apex

B. Supports the lingual side of anterior teeth

C. Separates molar cusps

D. Forms the occlusal groove

B. Supports the lingual side of anterior teeth

76. Which occlusion class is considered normal in the course material?

A. Class I

B. Class II

C. Class III

D. Class IV

A. Class I

77. What is an embrasure?

A. Opening into the pulp

B. Space around the contact between adjacent teeth

C. Root separation

D. Depression in a fossa

B. Space around the contact between adjacent teeth

78. Which teeth have oblique ridges?

A. Mandibular molars

B. Maxillary molars

C. Maxillary incisors

D. Mandibular canines

B. Maxillary molars

79. Which tooth commonly has a Cusp of Carabelli?

A. Mandibular first molar

B. Maxillary first molar

C. Maxillary canine

D. Mandibular second premolar

B. Maxillary first molar

80. Which feature distinguishes the maxillary first premolar from the second?

A. No marginal ridge

B. Mesial groove crossing the marginal ridge and possible bifurcated root

C. Cusp of Carabelli

D. Three roots in all cases

B. Mesial groove crossing the marginal ridge and possible bifurcated root

81. Compared with mandibular incisors, maxillary incisors generally have:

A. Less lingual anatomy

B. More prominent lingual anatomy

C. No cingulum

D. No marginal ridges

B. More prominent lingual anatomy

82. What is a primary function of canines?

A. Grinding only

B. Tearing food and guiding occlusion

C. Cutting like incisors only

D. Supporting the tongue

B. Tearing food and guiding occlusion

83. CEJ curvature is generally more pronounced on which surface?

A. Distal

B. Mesial

C. Facial

D. Lingual

B. Mesial

84. What is the childhood set of teeth called?

A. Permanent dentition

B. Primary dentition

C. Mixed dentition

D. Succedaneous dentition

B. Primary dentition

85. What is the adult set of teeth called?

A. Primary dentition

B. Mixed dentition

C. Permanent dentition

D. Deciduous dentition

C. Permanent dentition

86. Which three tooth classes occur in the primary dentition?

A. Incisors, canines, premolars

B. Incisors, canines, molars

C. Canines, premolars, molars

D. Incisors, premolars, molars

B. Incisors, canines, molars

87. Which tooth class is present in permanent but not primary dentition?

A. Canines

B. Incisors

C. Premolars

D. Molars

C. Premolars

88. What term describes teeth that are eventually shed and replaced?

A. Permanent

B. Deciduous

C. Succedaneous

D. Mixed

B. Deciduous

89. What is mixed dentition?

A. Only primary teeth are present

B. Only permanent teeth are present

C. Both primary and permanent teeth are present

D. Teeth are missing

C. Both primary and permanent teeth are present

90. Which classes make up the permanent dentition?

A. Incisors, canines, premolars, molars

B. Incisors, canines, molars

C. Incisors, premolars, molars

D. Canines, premolars, molars

A. Incisors, canines, premolars, molars

91. Which Universal letter identifies the primary maxillary left second molar?

A. A

B. E

C. J

D. T

C. J

92. Which letters identify the primary first molars?

A. A, J, K, T

B. B, I, L, S

C. C, H, M, R

D. D, G, N, Q

B. B, I, L, S

93. What letter identifies the primary maxillary left canine?

A. C

B. H

C. M

D. R

B. H

94. What is another name for a third molar?

A. Eye tooth

B. Wisdom tooth

C. Bicupsid

D. Deciduous tooth

B. Wisdom tooth

95. The junction where two tooth surfaces meet is called a:

A. Point angle

B. Line angle

C. Fossa

D. Sulcus

B. Line angle

96. A tooth can be divided vertically into which thirds?

A. Mesial, middle, distal

B. Cervical, middle, apical

C. Facial, cervical, incisal

D. Occlusal, middle, cervical

A. Mesial, middle, distal

97. Which divisions describe a tooth from facial to lingual?

A. Mesial, middle, distal

B. Facial, middle, lingual

C. Cervical, middle, incisal

D. Coronal, middle, apical

B. Facial, middle, lingual

98. What is a pyramidal elevation on a tooth called?

A. Fossa

B. Cusp

C. Groove

D. Sulcus

B. Cusp

99. A triangular ridge extends from the cusp tip toward the:

A. Root apex

B. Center/depression of the occlusal surface

C. Gingival margin

D. Proximal contact

B. Center/depression of the occlusal surface

100. What is the rounded prominence on the cervical third of the lingual surface of an anterior tooth?

A. Mamelon

B. Cingulum

C. Fossa

D. Sulcus

B. Cingulum