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NBDE dental anatomy > 632-641 > Flashcards

632-641 Flashcards

1
Q

Homodont dentition:

A

All teeth have the same morphology

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2
Q

Heterodont dentition:

A

Teeth have different morphology (eg, humans).

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3
Q

Monophyodont dentition:

■

A

One set of teeth.

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4
Q

Diphyodont dentition:

A

Two sets of teeth (eg, humans).

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5
Q

Polyphyodont dentition:

A

Multiple sets of teeth.

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6
Q

Anterior teeth: Incisors and canines.

■ Posterior teeth: Premolars and molars.

A

12 total (6 per arch).

20 total (10 per arch).

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7
Q

Anatomic crown:

A

The portion of the tooth that extends from the cementoenamel

junction (CEJ) to the incisal edge or occlusal surface (enamelcovered

portion of the tooth).

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8
Q

Clinical crown:

A

The portion of the tooth that extends incisally or occlusally

from the gingival margin (clinically visible portion of the tooth).

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9
Q

Occlusal table:

A

The occlusal surface within the cusp and marginal ridges

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10
Q

The primary center of enamel formation in a tooth.

A

Lobe:

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11
Q

In fully formedteeth, lobes are represented by

A

cusps, mamelons, and cingula, and are separated

by developmental depressions (anterior teeth) or developmental

grooves (posterior teeth).

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12
Q

Mamelon:

A

A round extension of enamel on the incisal edge of all incisors.

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13
Q

(See Figure 24–1.) There are usually three mamelons per .

A

incisor (one for

each facial lobe). They are often translucent because of a lack of underlying

dentin.

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14
Q

Mamelons are typically worn down by

A

attrition and mastication;

thus, their presence in adults is an indication of malocclusion

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15
Q

Cingulum:

A

A bulbous convexity of enamel located on the cervical third of

the lingual surface of all anterior teeth.

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16
Q

Cusp:

A

A large elevation of enamel located on the occlusal surface of all

posterior teeth and the incisal edge of canines.

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17
Q

Tubercle:

A

An extra formation of enamel on the crown of a tooth. Often

manifests as a supernumerary cusp, such as the cusp of Carabelli.

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18
Q

https://drive.google.com/open?id=0B8uJUY-tie8GelVKcVI0TE1LLVU

A

https://drive.google.com/open?id=0B8uJUY-tie8GYTdLLUdGNlJ3dWc

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19
Q

Ridge: ■

A

A linear elevation on the enamel surface.

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20
Q

Marginal ridge:

A

A ridge on all teeth that forms the mesial and distal margins

of posterior occlusal surfaces and anterior lingual surfaces

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21
Q

https://drive.google.com/open?id=0B8uJUY-tie8GaE9idGphMXl6c3c

A

https://drive.google.com/open?id=0B8uJUY-tie8GVWx1M0lBcmhVMGc

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22
Q

a ridge only on canines that runs incisocervically in the center

of the facial crown surface. More prominent in maxillary canines.

A

labial ridge

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23
Q

A ridge only on premolars that runs occlusocervically

in the center of the buccal crown surface. More prominent in first

premolars.

A

Buccal (cusp) ridge:

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24
Q

A ridge on all primary teeth and permanent molars that

runs mesiodistally in the cervical third of the buccal surface of the crown.

A

Cervical ridge:

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25
Q

ridge on all maxillary molars that extends from the ML

to DB cusps (it separates the MB and DL cusps).

A

Oblique ridge:

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26
Q

A ridge on all posterior teeth that extends from the cusp

tip to the central groove. The ML cusp of all maxillary molars has two triangular

ridges.

A

Triangular ridge:

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27
Q

A ridge on most posterior teeth that runs buccolingually

and connects opposing buccal and lingual triangular ridges. Most common

on maxillary premolars and mandibular molars.

A

Transverse ridge:

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28
Q

V-shaped depression on the occlusal surface of posterior teeth

between ridges and cusps.

A

Sulcus:

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29
Q

irregularly shaped depression in the enamel surface.

A

Fossa:

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30
Q

: A well-defined, shallow, linear depression in

enamel that separates the cusps, lobes, and marginal ridges of a tooth.

A

Developmental groove

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31
Q

A narrow crevice at the deepest portion of the developmental

groove in enamel.

A

Fissure:

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32
Q

: A small pinpoint concavity at the termination or junction of developmental

grooves

A

Pit

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33
Q

: An irregularly defined, short groove auxiliary to a

developmental groove that does not separate major tooth parts.

A

Supplemental groove

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34
Q

Line angle:■

A

An angle formed by the junction of two surfaces.

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35
Q

Point angle:

A

An angle formed by the junction of three surfaces.

36
Q

Contact area:

A

he location at which the proximal surfaces of two adjacent

teeth make contact.

37
Q

Embrasure:

A

A triangular-shaped space between the proximal surfaces of

adjacent teeth which diverges in four directions from the contact area.

38
Q

Buccal

■ Lingual

■ Occlusal/incisal

■ Cervical/gingival (interproximal space): In health, this space is completely

filled with the gingival papilla.

A

embrasures

39
Q

Largest occlusal embrasure:

A

between max canine and PM1

40
Q

Largest incisal embrasure:

A

between max lateral and canin

41
Q

Smallest incisal embrasure:

■

A

between mand centrals.

42
Q

In general, lingual embrasures > buccal embrasures,

A

except Max M1 (buccal

embrasures > lingual)

43
Q

Furcation:

A

The area of a multirooted tooth where the roots diverge

44
Q

All dental and periodontal innervation arises from the

A

trigeminal nerve

(CN V)

45
Q

The maxillary nerve (V-2) supplies the

■

A

maxillary teeth.

46
Q

The mandibular nerve (V-3) supplies the

A

mandibular teeth.

47
Q

All dental and periodontal arterial supply arises from the

A

maxillary artery

48
Q

The arterial supply of dental and periodontium generally parallels the

A

corresponding nerves.

49
Q

All dental and periodontal venous return drains to the

A

pterygoid plexus of

veins, which eventually forms as the maxillary vein.

50
Q

https://drive.google.com/open?id=0B8uJUY-tie8GZGE0Q2VlZzZyVDg

A

https://drive.google.com/open?id=0B8uJUY-tie8GOUdCeGF0TmY0emM

51
Q

https://drive.google.com/open?id=0B8uJUY-tie8GaXpYV1RITVBBdG8

A

https://drive.google.com/open?id=0B8uJUY-tie8GWTV0WVNXZFlPN0k

52
Q

Federation Dentaire Internationale (FDI) System:

A

Federation Dentaire Internationale (FDI) System: Each tooth is

given a two-digit number. The first digit represents the quadrant in

which the tooth is located (1, 2, 3, or 4). The second digit indicates

the tooth position relative to the midline, from closest to farthest away

(1 to 8) (Figure 24–7B).

53
Q

prox contacts

A

Generally located increasingly more incisally (occlusally) from the posterior to

the anterior.

54
Q

The mesial contact is always located more incisally than the distal.

A

prox contact

55
Q

Proximal contacts prevent

A

rotation, mesial drift, and food impaction.

56
Q

All are located in the—- of the crown.

■ Posterior contacts are positioned slightly —–

A

All are located in the middle 1/3 of the crown.

■ Posterior contacts are positioned slightly buccal.

57
Q

All anterior teeth.

A

Triangular:

58
Q

Trapezoidal:

■

A

All maxillary posterior teeth.

59
Q

Rhomboidal:

A

All mandibular posterior teeth.

60
Q

Facial HOC’s:■ ■

A

Located in the cervical third, except mandibular molars (junction of

cervical and middle thirds).

61
Q

Facial HOC

Most prominent on—- —— teeth.

■ Least prominent on—— ——teeth.

A

Facial HOC

Most prominent on mandibular posterior teeth.

■ Least prominent on mandibular anterior teeth.

62
Q

Lingual HOC’s:

■ Anterior teeth:

A

Located in the cervical third (cingulum).

63
Q

ling. HOC

Posterior teeth:

A

Located in middle third, except mandibular PM2

(occlusal third).

64
Q

Help form the mesial and distal contact areas.

■ Allow for adequate gingival health.

A

HOC

65
Q

The maximum height of the proximal CEJ contour increases

A

ant

66
Q

The mesial CEJ contour is always —– than the distal contour.

■ The greatest CEJ contour is on the maxillary —- —–

A

The mesial CEJ contour is always greater than the distal contour.

■ The greatest CEJ contour is on the maxillary central incisor (mesial surface).

67
Q

Incisors and canines:

A

4 lobes (3 labial [mamelons], 1 lingual [cingulum]).

68
Q

Premolars:

A

4 lobes (3 buccal, 1 lingual) except mand PM2, which has 5

lobes (3 buccal, 2 lingual).

69
Q

5 lobes (one for each cusp).

■

A

First molars:

70
Q

Second molars:

Third molars:

A

4 lobes (one for each cusp).

4 or 5 lobes (one for each cusp, depending on variation).

71
Q

Maxillary: ■

A

128 mm (slightly longer).

72
Q

Mandibular:

A

126 mm.

73
Q

Most prominent tooth.

A

max. CI

74
Q

Greatest mesial CEJ contour of all teeth.

■ Second longest crown (next to mandibular canine).

A

max. CI

75
Q

Widest (M-D) of all anterior teeth.

A

Max CI

76
Q

Occlusal shape is triangular; proximal shape is triangular.

■ Has three mamelons and four developmental grooves.

A

Central CI

77
Q

MMR > DMR

A

max CI

78
Q

MI corner sharper than

A

DI in max CI

79
Q

Narrowest incisal embrasures of all maxillary teeth.

A

max CI

80
Q

oclusal of max CI

A

M-D dimension > F-L (from occlusal).

81
Q

Cingulum: slightly distal.

A

max CI

82
Q

Least likely to have a divided root canal.

A

max CI

83
Q

Roundest root form; can be rotated during extraction.

■ Blunted apex.

A

Max CI

84
Q

Has greatest axial inclination toward the facial.

■ Sits almost vertically (M-D) in alveolar bone.

A

max CI

85
Q

Occludes with mandibular central and lateral incisors

A

max CI

86
Q

Third most common congenitally missing tooth (next to third molars).

A

max lat inc

NBDE dental anatomy (5 decks)

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