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Dental Anatomy > Mandibular Incisors > Flashcards

Mandibular Incisors Flashcards

1
Q

where are the proximal contact areas on mandibular incisors?

A

incisal 1/3 both mesial and distal

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2
Q

mandibular incisal ridges are more _____ in proximal view

A

labial

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3
Q

incisal edges wear _____ on mandibular incisors

A

labially

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4
Q

mandibular incisors are generally anterior/posterior to maxillary incisors

A

posterior

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5
Q

in mandibular incisors, roots are shorter/longer than crowns

A

longer

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6
Q

roots in mandibular incisors bend towards the ____ in apical direction

A

distal

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7
Q

mandibular incisors: roots are wider ____ than ___

A

FL

MD

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8
Q

mandibular incisors: are there mesial and distal root depressions?

A

yes, bigger depression on distal

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9
Q

incisal angles on mandibular central incisors

A

sharp, distal is slightly less

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10
Q

marginal ridges on man central incisor

A

slightly conspicuous towards the incisal

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11
Q

in man central incisor, crown is more_____ FL as you progress to the gingival

A

convex

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12
Q

in mand central incisor, cingulum is less/more developed

A

less

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13
Q

mand central incisor: few/many developmental lines and grooves

A

few

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14
Q

incisal view of mand central incisor:

symmetry:
incisal edge:
FL vs MD dimension

Incisal third convex/concave on F and convex/concave on L

A

bilateral even symmetry, not twisted

incisal edge is straight with slight curve

FL greater than MD

convex, concave

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15
Q

Mandibular Central Incisor Mesial View:

Incisal ridge is ____ to the center of the tooth

_____ is flat from cervical height of contour to incisal ridge

F and Li Height of Contour is in _____ 1/3. Facial/Lingual slightly higher

CEJ is more curved on Mesial/Distal than on the Mesial/Distal

_____ grooves usually present and deeper than mesial/distal

A

Lingual

Facial

Cervical, Lingual

Mesial, distal

root, mesial (depper on distal)

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16
Q

Pulpal Anatomy of a Mandibular Central Incisor

Much greater ____ dimensions

A

facial/lingual

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17
Q

Mandibular Lateral Incisor Facial View:

Narrower/Wider than central and not as symmetrical

Crown tilts slightly _____ on the root

Slight ____ tilt of incisal edge

Curved M/D outline that appears shorter than the straighter M/D outline

Mesial and Distal contacts are at the same/not the same level

A

Wider

distal

distal

distal, mesial

not at the same

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18
Q

Mandibular Lateral Incisor Labial View:

Slightly _____ cant to lingual cingulum

Smooth, barely discernible ____ _____ and ______ _____. Similar to central

Roots are convex/concave and slightly larger/narrower than on the facial side. Similar to central

A

distal

marginal ridges, lingual fossa

convex, narrower

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19
Q

Mandibular Lateral Incisor Incisal View:

Lateral incisor incisal edge is ______

Cingulum is located towards the _____

Incisal ridge is located on the perpendicular line or slightly ______

A

twisted

distal

lingual

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20
Q

Mandibular Lateral Incisor Mesial View:

Mesial/Distal portion of marginal ridge more lingual than the mesial/distal. ____ twist

Height of contour in the _____ 1/3
similar to central incisors

CEJ curves more on the mesial/distal than on the mesial/distal

A

distal, mesial, distal

cervical

mesial, distal

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21
Q

Mandibular Lateral Incisor Distal View:

None of the ______ surface is visible

More distinct root depression than on the mesial root

______ root groove is almost always present

A

lingual

distal

22
Q

central/lateral is more symmetrical

A

central

23
Q

crown outline is more convex on the distal of the central/lateral

A

lateral

24
Q

For centrals/laterals the mesial incisal line angle is similar or slightly sharper than the distal incisal line angle. For centrals/laterals
the mesial incisal line angle is sharper than the distal incisal line angle

A

centrals

laterals

25
Q

The contacts are at the same height on the mesial and the distal of the central/lateral

A

central

26
Q

Proximal contacts are at different heights on the central/lateral

A

lateral

27
Q

fusion

A

union of two adjacent teeth

28
Q

In ____, crown has doubled in width but there are separate root canals and pulp chambers

A

fusion

29
Q

_____ results in a reduced number of teeth

A

fusion

30
Q

gemination

A

same number of teeth

1 pulp canal and 2 pulp chambers

31
Q

initial calcification of Maxillary permanent central incisors occurs ____ -____
months

A

3-4

32
Q

initial calcification of Mandibular permanent

incisors occurs __-__ months

A

3-4

33
Q

initial calcification of Maxillary permanent lateral
incisors occurs __-___
months

A

10-12

34
Q

eruption mandibular first molar

A

6-7 years

35
Q

eruption mandibular central incisor

A

6-7 years

36
Q

eruption mandibular lateral incisor

A

7-8 years

37
Q

eruption maxillary central incisor

A

7-8 years

38
Q

eruption maxillary lateral incisor

A

8-9 years

39
Q

eruption mandibular canine

A

9-10

40
Q

permanent eruption sequence

A

mandibular first molar

mandibular central incisor

mandibular lateral incisor

maxillary central incisor

maxillary lateral incisor

mandibular canine

41
Q

mand central vs lateral crown length

A
  1. 8

9. 4

42
Q

mand central vs lateral root length

A
  1. 6

13. 5

43
Q

mand central vs lateral root/crown ratio

A
  1. 43

1. 43

44
Q

mand central vs lateral overall length

A
  1. 8

22. 1

45
Q

mand central vs lateral crown width MD

A
  1. 3

5. 7

46
Q

mand central vs lateral cervix width MD

A
  1. 5

3. 8

47
Q

mand central vs lateral crown width FL

A
  1. 7

6. 1

48
Q

mand central vs lateral cervix width FL

A
  1. 4

5. 8

49
Q

mand central vs lateral mesial cervical curve

A

2

2.1

50
Q

mand central vs lateral distal cervical curve

A
  1. 6

1. 5

Dental Anatomy (5 decks)

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