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Flashcards in max incisor Deck (77):
1

All Incisors are formed by----developmental lobes

----- on facial, ---- on lingual

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

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2

Most dominant tooth of “smile zone”

Maxillary Central Incisor

3

Single central incisor most challenging to restore esthetically

Maxillary Central Incisor

4

tf max. central incisor facial surface

Crown is slightly longer incisogingivally than mesiodistally

T

5

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

F

distally

6

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

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

7

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

mesio-incisal angle -----, distoincisal angle more -------

Incisal edge straight with 3 mamelons;

mesio-incisal angle sharp, distoincisal angle more rounded

8

correct the following;

Maxillary central incisor

Two deep developmental depressions between the 4 facial lobes

Two shallow developmental depressions between the three facial lobes

9

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

T

10

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

on lingual aspect of max central incisor

11

TF max central incisor;

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

F distal

12

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

F

4--> cingulum, mesial, distal, incisor

13

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

T

14

Crown roughly triangular or wedge shaped

max central incisor(mesial)

15

tf 

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

Incisal tip and root apex on bisecting line

16

mesial aspect of max central incisor

CEJ line curves greatly toward ----

CEJ line curves greatly toward incisal (

17

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

T

18

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

B

CEJ line less pronounced than mesial

19

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

t

20

incisal of max central incisor

Roughly triangular outline

21

wider mesiodistally than faciolingually

max central inc (incisal view)

22

tf

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

Distinct mesio-facial and distofacial line angles

23

max lat incisors

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

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

24

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

t

25

max central incisor

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

 

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

26

incisal view of max central incisor

 

1) Cingulum

2) Mesial marginal ridge

3)-------

4) Lingual fossa

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

27

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

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28

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

1;1.5

29

max central incisor

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

------ pulp canal

Single, conical, relatively straight; may incline distally

single pulp canal

30

“Peg” lateral  and Sometimes congenitally missing

Maxillary Lateral Incisor

31

Sometimes congenitally missing

max lat incisors

32

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

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

33

tf max lat incisor Exhibits less curvature than central

F Exhibits more curvature than central

34

tf max lat incisor Mesial outline straighter than the distal outline

 

t

35

max lat  incisors have --- when newly erupted

mammelons

36

correct the statement

max lat incisor-->

More rounded incisal angles (DI < rounded than MI)

max lat incisor-->

More rounded incisal angles (DI > rounded than MI)

37

tf max lat inc.-->

Incisal edge may slope gingivally toward mesial aspect

f

Incisal edge may slope gingivally toward distal aspect

38

tf max lat incisor Shorter and narrower than central incisor

t

39

max lateral incisor -->Root--- with --- inclination

Root conical with distal inclination

40

(narrow mesiodistally broad faciolingually

root of max lat incisor

41

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

Crown and root taper to the lingual

42

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

F

More prominent cingulum and marginal ridges than central

43

Deeper lingual fossa which may have developmental grooves or lingual pit

max lat incisor

44

Most pronounced lingual anatomy of all anteriors

max lat incisor

45

lat max incisor

Root uniformly -----

Root apex usually inclines ----

Root uniformly convex

Root apex usually inclines distally

46

lat max incisor

mesial view

Wedge-shaped crown

47

Incisal ridge broader faciolingually

mesial of max lat incisor

48

mesial max lat incisor

Incisal edge is over center of tooth

49

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

CEJ line is less pronounced than central

50

tf

max lat incisor Cingulum may be slightly more convex than central

t

51

tf

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

t

52

TF

Distal CEJ is less curved than mesial of max lat incisor

T

53

More ovoid crown outline form

max lat incisors

54

More convex facially and lingually than central incisor

max lat incisor 

55

Marginal ridges and cingulum more prominent than central incisor

max lat incisor

56

Cingulum more centered

on max lat incisor

57

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

max lat and central incisor

58

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

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

max lat incisor

59

Wider faciolingually than mesiodistally

max lat incisor

60

Wider mesiodistally at the labial than the lingual

max lat incisor

61

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

Radicular grooves (RGs)

62

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

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

63

the course of the radicular grooves is ----.

the course of the grooves is straight.

64

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

Radicular grooves

65

radicular grooves

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

66

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

radicular grooves

67

promotes accumulation of difficult-to-remove plaque and calculus

radicular grooves

68

prognosis of pulp diseases and/or periapical inflammation

in presense of radicular grove

depends in part on the groove’s extension,

the depth of the groove,

and the relation of the groove to the pulp cavity

69

Biological width

Epithelial attachment (0.97 mm) +

Connective tissue attachment (1.07 mm)

70

A

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Histological sulcus 

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71

Q image thumb

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72

tf retrognathic profile is more prevalent than prognathic profile

T

22% vs. 6%

73

distal occlusion

retrognathic profile

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74

mesial occlusion

prognathic profile

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75

horizonta overlap

overjet

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76

vertical overlap 

overbite

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77

ant guidanc

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