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Dental Morph > maxillary incisors > Flashcards

maxillary incisors Flashcards

1
Q

GENERAL NOTES ABOUT ANATOMY OF MAXILLARY CENTRAL INCISORS

A
  • crown is longer than it is wide
  • root is longer than the crown
  • crown is wider mesiodistally than faciolingually
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2
Q

when is the first evidence of calcification for maxillary central incisors?

A

3-4 months

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3
Q

when is the enamel (crown) completed for a maxillary central incisor?

A

4-5 months

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4
Q

when is the time of eruption for maxillary central incisors?

A

7-8 years

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5
Q

when is the root completed for maxillary central incisors?

A

10 years

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6
Q

GENERAL NOTES ABOUT MAXILLARY CENTRAL INCISORS

A
  • used for cutting or incising food
  • shovel shaped
  • succedaneous teeth
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7
Q

where is the mesial interproximal contact located for a maxillary central incisor?

A

incisal 1/3 of tooth

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8
Q

what is the point of greatest convexity on a tooth surface?

A

height of convexity / contour

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9
Q

where is the distal interproximal contact located for a maxillary central incisor?

A

junction of the middle and incisal 1/3’s

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10
Q

what are the rounded protuberances found on the incisal edges of newly erupted incisors called?

A

mamelons
NOTE - generally wear away with time to give a flat incisal edge

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11
Q

what incisal angle is a right angle for a maxillary central incisor?

A

mesioincisal

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12
Q

what incisal angle is a more rounded angle for a maxillary central incisor?

A

distoincisal angle

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13
Q

what is a junction of two tooth surfaces called?

A

line angle

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14
Q

what is a junction of three tooth surfaces called?

A

point angle

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15
Q

what is the cervical line / CEJ curved towards on a maxillary central incisor (facial)?

A

root apex

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16
Q

how many roots does a maxillary central incisor have?

A

single inverted cone shaped root (located slightly distal of long axis of tooth)

17
Q

what is the lingual fossa bound by on a maxillary central incisor?

A

incisal edge, mesial and distal marginal ridges, cingulum

18
Q

in what direction is the CEJ curved towards the root (lingually) for a maxillary central incisor?

A

convex

19
Q

where does the incisal edge lay when the tooth is bisected longitudinally for a maxillary central incisor?

A

incisal edge lays on line

20
Q

NEED TO REMEMBER - MAXILLARY CENTRAL INCISORS

A

the mesial cervical line has the greatest amount of curvature of any tooth in the mouth
NOTE - mesial curvature is greater than distal aspect

21
Q

where is the point of convexity of the cingulum (incisal aspect) for a maxillary central incisor?

A

distal to the center of the lingual surface

22
Q

how many pulp canals and pulp horns are present on a maxillary central incisor?

A

pulp canal - 1
pulp horns - 3 (disappear as a person ages)

23
Q

how many lobes does a maxillary central incisor devleop from?

A

4 lobes
- mesial : develops into mesial marginal ridge and mesial part of labial surface
- distal : developed into distal marginal ridge and distal part of the labial surface
- labial : developed into labial ridge
- lingual : develops into cingulum

24
Q

when is the first evidence of calcification for maxillary lateral incisors?

A

1 year

25
Q

when is the enamel (crown) completed for maxillary lateral incisors?

A

4-5 years

26
Q

when does eruption occur for maxillary lateral incisors?

A

8-9 years

27
Q

when is the root completed for maxillary lateral incisors?

A

11 years

28
Q

NEED TO REMEMBER - MAXILLARY LATERAL INCISORS

A

the maxillary lateral incisor varies in form more than any other tooth in the mouth
(exception - third molars)

29
Q

NEED TO REMEMBER - MAXILLARY LATERAL INCISORS

A

maxillary lateral incisors are the most frequently congenitally absent ANTERIOR tooth
(third molars are more frequently congenitally absent tooth)

30
Q

where is the mesial height of contour at on a maxillary lateral incisor?

A

junction of the middle and incisal 1/3’s

31
Q

where is the distal height of contour at on a maxillary lateral incisor?

A

in middle 1/3

32
Q

GENERAL NOTES ABOUT MAXILLARY LATERAL INCISORS

A

similar in shape to maxillary central incisors…
- smaller in all dimensions except root length
- more rounded
- more pronounced mesial and distal marginal ridges
- lingual fossa is deeper

33
Q

where is the greatest curvature on the facial and lingual surfaces of a maxillary lateral incisor?

A

cervical 1/3 (also true in central incisor)

34
Q

which direction (mesial or distal) is the crest of the cingulum located when viewed from the incisal edge (maxillary lateral incisor)?

A

slightly to the distal of center of tooth

35
Q

how many pulp canals does a maxillary lateral incisor have and how many pulp horns?

A

pulp canal - 1
pulp horns - 2

36
Q

how many lobes does a maxillary lateral incisor develop from?

A

4 lobes

Dental Morph (8 decks)

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