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dental anatomy > mandibular incisor > Flashcards

mandibular incisor Flashcards

1
Q

covered by enamel vs covered by cemenum

A

anatomic crown vs. anatomic root

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2
Q

The portion of a tooth that is above the gingival margin.

A

Clinical Crown

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3
Q

Narrowest and shortest of all permanent teeth

A

Mandibular Central Incisor

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4
Q

Mandibular Central Incisor

A

Crown to root ratio approaching one to one

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5
Q

single canal from crown to apex

A

type 1 vertuccir

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6
Q

pulp separates in two near the crown and joins back together at apex to form one root canal

A

type 2 vertucci classification

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7
Q

root separate into 2 distinct canals and extends to root apex separately

A

type 4 vertucci

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8
Q

starts as one root canal in pulp chamber and divides into 2 as it reaches apical foramen

A

type 3 vertucci

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9
Q

slightly larger in all dimensions than central incisor and not bilaterally symmetric

A

Mandibular Lateral Incisor

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10
Q

Crown is bilaterally symmetrical (mesial and distal halves are almost identical)

A

Mandibular Central Incisor

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11
Q

tf Mandibular Central Incisor

dont have mamelon

A

f

Mamelons when newly erupted

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12
Q

Mandibular Central Incisor

Incisal edge straight; —– to long axis of tooth

A

Incisal edge straight; perpendicular to long axis of tooth

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13
Q

tf Mandibular Central Incisor;

round MI and DI angles

A

Sharp MI and DI angles (~90°)

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14
Q

tf Mandibular Central Incisor

Facial surface quite rough

A

F

Facial surface quite smooth

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15
Q

correct the statement

Mandibular Central Incisor Root long , straight, spherical, very wide mesiodistally

A

Mandibular Central Incisor Root short, straight, conical, very narrow mesiodistally

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16
Q

Relatively smooth lingual aspect of Mandibular Central Incisor

A

T

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17
Q

Mandibular Central Incisor–>

Crown tapers to the lingual on lingual surface

(not root)

A

T

Mandibular Central Incisor–>

Crown tapers to the lingual (not root)

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18
Q
A
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19
Q

max incisors have Less prominent cingulum, marginal ridges, and lingual fossa than Mandibular Central Incisor

A

F

Mandibular Central Incisor have

Less prominent cingulum, marginal ridges, and lingual fossa than maxillary incisors

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20
Q

Mandibular Central Incisor;

Incisal edge slightly lingual to bisecting line(mesial aspect)

A

T

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21
Q

Maxillary Central Incisor

A

triangular or wedge shaped

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22
Q

tf Mandibular Central Incisor

have Pronounced CEJ line (less than maxillary central)

A

t

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23
Q

S – shaped on lingual (slightly convex cingulum; slightly concave fossa)

A

Mandibular Central Incisor

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24
Q

Root broad faciolingually

A

Mandibular Central Incisor

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25
Q

Mandibular Central Incisor distal aspect

A

CEJ less pronounced than mesial

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26
Q

Incisal edge straight and slightly lingual to center

A

Mandibular Central Incisor

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27
Q

Incisal edge perpendicular to faciolingual bisecting line

A

Mandibular Central Incisor

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28
Q

tf mandib. facial incisor is Wider mesiodistally than

faciolingually

A

f

Wider faciolingually than mesiodistally

29
Q

tf central mandib incisor have a trapezoidal shape

A

f

Roughly triangular crown outline form

30
Q

tf Mandibular Central Incisor

Cingulum centered but may be slightly offset distally

31
Q

Mesial and distal portions symmetrical

A

Mandibular Central Incisor incisal view

32
Q

Single, short, and straight

A

root of Mandibular Central Incisor

33
Q

Narrow mesiodistally

Broad faciolingually

A

root of

Mandibular Central Incisor

34
Q

narrow, elongated ribbon shaped pulp

A

Cervical cross-section of Mandibular Central Incisor

35
Q

tf Mandibular Central Incisor have only one pulp canal

A

f Often two pulp canals

(one facial, one lingual)

36
Q

Hour glass shape

A

Mandibular Central Incisor

37
Q

Mandibular Central Incisor

A

Narrow mesiodistally

Broad faciolingually

38
Q

tf Mandibular Central Incisor only have mesial root concavities

A

f

Mandibular Central Incisor

Usually mesial and distal root concavities

39
Q

facial and lingual pulp canal

A

Mandibular Central Incisor

40
Q

Erupts at age 7-8

A

Mandibular Lateral Incisor

41
Q

tf Mandibular Lateral Incisor isnt bilat symmtericall

42
Q

Tf Mandib. Central incisors slightly larger in all dimensions than Mandibular Lateral Incisor

A

f

Mandibular Lateral Incisor slightly larger in all dimensions

43
Q

facial aspect of Mandibular Lateral Incisor

A

Incisal edge slopes gingivally toward distal

44
Q

tf Mandibular Lateral Incisor

MI angle slightly more rounded than DI angle

A

Mandibular Lateral Incisor

DI angle slightly more rounded than MI angle

45
Q

tf

Mandibular Lateral Incisor(facial view)

Mesial outline straighter than distal outline

46
Q

tf

Root apex may curve mesially in Mandibular Lateral Incisor

A

f distally

47
Q

Facial surface smooth and flat in the incisal 2/3

A

Mandibular Lateral Incisor

48
Q

smooth surface lingual anatomy

A

Mandibular Lateral and central Incisor

49
Q

Cingulum is slightly distal to the center of the crown

A

Mandibular Lateral Incisor

50
Q

Crown tapers towards lingual

A

Mandibular Lateral Incisor

51
Q

tf in

Mandibular Lateral Incisor

Distal marginal ridge is slightly shorter than mesial marginal ridge due to slope

52
Q

CEJ line less pronounced

A

Mandibular Lateral Incisor< central incisor

53
Q

facial HOC and lingual HOC in cervical third

A

mandibular lateral and central incisor

54
Q

incisal edge lingual to bisecting line(mesial aspect)

A

mandib. central and lat incisor

55
Q

root broad faciolingually and concavity present on mesial surface

A

mandib lateral incisor

56
Q

CEJ line less curved than mesial

A

Mandibular Lateral Incisor

(distal view)

57
Q

distal surface is shorter incisogingivally than mesial surface

A

Mandibular Lateral Incisor

58
Q

Mandibular Lateral Incisor

A

crown is “twisted”

59
Q

More of incisal ridge and facial surface shows from distal aspect

A

on Mandibular Lateral Incisor

60
Q

deep concavity on distal surface

A

Mandibular Lateral Incisor

61
Q

Root short, straight, conical, very narrow mesiodistally

A

Mandibular Central and lateral Incisor

62
Q

Crown appears as if twisted at its base

A

Mandibular Lateral Incisor(incisal view)

63
Q

tf

Mandibular Lateral Incisor

Incisal edge not perpendicular to faciolingual bisecting line;

A

F

Incisal edge not perpendicular to faciolingual bisecting line;

64
Q

distal aspect of incisal edge more lingually positioned in

A

Mandibular Lateral Incisor

65
Q

Mandibular Lateral Incisor

A

Cingulum more noticeably displaced toward the distal

66
Q

central incisor root; may incline distally

A

root of Mandibular Lateral Incisor

67
Q

May have shallower root concavities on mesial and distal

A

Mandibular Lateral Incisor

68
Q

Mandibular Lateral Incisor

cervical cross section

A

longer faciolingualy than distal mesially

dental anatomy (12 decks)

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