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dental anatomy > max incisor > Flashcards

max incisor Flashcards

1
Q

All Incisors are formed by—-developmental lobes

—– on facial, —- on lingual

A

All Incisors are formed by four developmental lobes three on facial, one on lingual

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2
Q

Most dominant tooth of “smile zone”

A

Maxillary Central Incisor

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3
Q

Single central incisor most challenging to restore esthetically

A

Maxillary Central Incisor

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4
Q

tf max. central incisor facial surface

Crown is slightly longer incisogingivally than mesiodistally

A

T

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5
Q

tf max central inc facial surface; Root is conical and straight; may incline mesially

A

F

distally

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6
Q

Correct the following; max central incisor–>

Mesial outline relatively round with contact at incisal 2/3 • Distal outline straight with contact at junction of incisal and middle thirds

A

Mesial outline relatively straight with contact at incisal 1/3 • Distal outline more rounded with contact at junction of incisal and middle thirds

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7
Q

max. central incisor–>Incisal edge straight with —- mamelons;

mesio-incisal angle —–, distoincisal angle more ——-

A

Incisal edge straight with 3 mamelons;

mesio-incisal angle sharp, distoincisal angle more rounded

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8
Q

correct the following;

Maxillary central incisor

Two deep developmental depressions between the 4 facial lobes

A

Two shallow developmental depressions between the three facial lobes

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9
Q

TF Lingual aspect of max. central incisor is narrower than facial aspect mesiodistally

A

T

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10
Q

Cingulum (bulky convexity at cervical 1/3 of lingual aspect) formed by lingual developmental lobe

A

on lingual aspect of max central incisor

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11
Q

TF max central incisor;

the central portion of the cingulum is typically located mesial to the center on the crown

A

F distal

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12
Q

lingual fossa is created by 3 ridges in the max central incisor

A

F

4–> cingulum, mesial, distal, incisor

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13
Q

TF lingual fossa of max central inc. May have developmental grooves in fossa and lingual pit

A

T

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14
Q

Crown roughly triangular or wedge shaped

A

max central incisor(mesial)

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15
Q

tf

max central inc –> Incisal tip and root apex lingual to bisecting line

A

Incisal tip and root apex on bisecting line

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16
Q

mesial aspect of max central incisor

CEJ line curves greatly toward —-

A

CEJ line curves greatly toward incisal (

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17
Q

tf incisal ridges are visible from mesial surface of max central inc.

A

T

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18
Q

which is false about max central incisors from distal surface?

Shorter incisocervically than mesial

CEJ line more pronounced than mesial

Contact area more cervically positioned than mesial

A

B

CEJ line less pronounced than mesial

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19
Q

Max central incisor

tf

Due to the turn of the tooth along the arch, you see more of the facial surface of the crown from the distal view. Also, the mesial marginal ridge is not visible from this view

A

t

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20
Q

incisal of max central incisor

A

Roughly triangular outline

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21
Q

wider mesiodistally than faciolingually

A

max central inc (incisal view)

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22
Q

tf

only has max central incisor has only Distinct mesio-facial line angles

A

Distinct mesio-facial and distofacial line angles

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23
Q

max lat incisors

Termed incisal —- when newly erupted (slightly rounded); after wear it becomes flattened and is termed incisal —-

A

Termed incisal ridge when newly erupted (slightly rounded); after wear it becomes flattened and is termed incisal edge

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24
Q

tf

incisal view of max central inc

The proximal contacts are in the middle of the middle third of the crown and in line with the incisal ridge

A

t

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25
Q

max central incisor

cingulum is positioned slightly —- to the bisecting line which yields a slightly —- mesial outline of the lingual surface vs. the distal

A

cingulum is positioned slightly distal to the bisecting line which yields a slightly longer mesial outline of the lingual surface vs. the distal

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26
Q

incisal view of max central incisor

1) Cingulum
2) Mesial marginal ridge
3) ——-
4) Lingual fossa

A

1)Cingulum 2) Mesial marginal ridge 3) Distal marginal ridge 4) Lingual fossa

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27
Q

cervical cross section of max central incisors;

Horizontal cross-section at the —- region shows an external —– ——-outline form

and also a —— —— outline form of the pulp

A
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28
Q

Crown to Root Ratio 1: 1 ½ of max central incisors

A

1;1.5

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29
Q

max central incisor

Single, —–, relatively straight; may incline —-

—— pulp canal

A

Single, conical, relatively straight; may incline distally

single pulp canal

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30
Q

“Peg” lateral and Sometimes congenitally missing

A

Maxillary Lateral Incisor

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31
Q

Sometimes congenitally missing

A

max lat incisors

32
Q

Over 60% of the maxillary central incisor specimens showed —- canals

A

Over 60% of the maxillary central incisor specimens showed accessory canals

33
Q

tf max lat incisor Exhibits less curvature than central

A

F Exhibits more curvature than central

34
Q

tf max lat incisor Mesial outline straighter than the distal outline

A

t

35
Q

max lat incisors have — when newly erupted

A

mammelons

36
Q

correct the statement

max lat incisor–>

More rounded incisal angles (DI < rounded than MI)

A

max lat incisor–>

More rounded incisal angles (DI > rounded than MI)

37
Q

tf max lat inc.–>

Incisal edge may slope gingivally toward mesial aspect

A

f

Incisal edge may slope gingivally toward distal aspect

38
Q

tf max lat incisor Shorter and narrower than central incisor

A

t

39
Q

max lateral incisor –>Root— with — inclination

A

Root conical with distal inclination

40
Q

(narrow mesiodistally broad faciolingually

A

root of max lat incisor

41
Q

Crown and root taper to the —- in max lat incisor

A

Crown and root taper to the lingual

42
Q

max lat incisor –> less prominent cingulum and marginal ridges than central

A

F

More prominent cingulum and marginal ridges than central

43
Q

Deeper lingual fossa which may have developmental grooves or lingual pit

A

max lat incisor

44
Q

Most pronounced lingual anatomy of all anteriors

A

max lat incisor

45
Q

lat max incisor

Root uniformly —–

Root apex usually inclines —-

A

Root uniformly convex

Root apex usually inclines distally

46
Q

lat max incisor

mesial view

A

Wedge-shaped crown

47
Q

Incisal ridge broader faciolingually

A

mesial of max lat incisor

48
Q

mesial max lat incisor

A

Incisal edge is over center of tooth

49
Q

tf mesial view of max lat incisor–>CEJ line is more pronounced than central

A

CEJ line is less pronounced than central

50
Q

tf

max lat incisor Cingulum may be slightly more convex than central

A

t

51
Q

tf

distal view of max lat incisors–>Facial contour more rounded than central

A

t

52
Q

TF

Distal CEJ is less curved than mesial of max lat incisor

A

T

53
Q

More ovoid crown outline form

A

max lat incisors

54
Q

More convex facially and lingually than central incisor

A

max lat incisor

55
Q

Marginal ridges and cingulum more prominent than central incisor

A

max lat incisor

56
Q

Cingulum more centered

A

on max lat incisor

57
Q

proximal contact in line in the middle of the middle third of the crown and the incisal ridge

A

max lat and central incisor

58
Q

Horizontal cross-section at cervical region shows a more —- outline form (pulp also)

A

Horizontal cross-section at cervical region shows a more ovoid outline form (pulp also); single root

max lat incisor

59
Q

Wider faciolingually than mesiodistally

A

max lat incisor

60
Q

Wider mesiodistally at the labial than the lingual

A

max lat incisor

61
Q

developmental groove in the root of teeth that may continue apically down the root.

A

Radicular grooves (RGs)

62
Q

Grooves run from the beginning of the ——- and along the root surface to the —-.

A

Grooves run from the beginning of the cemento-enamel junction (CEJ) and along the root surface to the apex.

63
Q

the course of the radicular grooves is —-.

A

the course of the grooves is straight.

64
Q

most often located on the palatal aspect of maxillary lateral incisors,

A

Radicular grooves

65
Q

radicular grooves

A

and rarely on the labial root surface of the central incisors.

66
Q

distal position dominating, as it occurs in approximately 70% of cases

A

radicular grooves

67
Q

promotes accumulation of difficult-to-remove plaque and calculus

A

radicular grooves

68
Q

prognosis of pulp diseases and/or periapical inflammation

in presense of radicular grove

A

depends in part on the groove’s extension,

the depth of the groove,

and the relation of the groove to the pulp cavity

69
Q

Biological width

A

Epithelial attachment (0.97 mm) +

Connective tissue attachment (1.07 mm)

70
Q

A

A

Histological sulcus

71
Q
A
72
Q

tf retrognathic profile is more prevalent than prognathic profile

A

T

22% vs. 6%

73
Q

distal occlusion

A

retrognathic profile

74
Q

mesial occlusion

A

prognathic profile

75
Q

horizonta overlap

A

overjet

76
Q

vertical overlap

A

overbite

77
Q

ant guidanc

A

Contact of maxillary incisors and mandibular incisors to guide mandible downward to create disarticulation of the posterior teeth

dental anatomy (12 decks)

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