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Oral Anatomy > Lecture 2 > Flashcards

Lecture 2 Flashcards

1
Q

class I occlusion

A

when the mesiobuccal cusp of the maxillary 1st molar fits into the mesiobuccal groove of the mandibular 1st molar; person has an orthognathic profile

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2
Q

distal occlusion or class II occlusion

A

mandible is retruded; person has a retrognathic profile

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3
Q

mesial occlusion of class III occlusion

A

mandible is protruded; called an “overbite” and person has a prognathic profile

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4
Q

space between the two maxillary central incisors

A

diastema

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5
Q

function of incisors

A
  • cut food
  • articulate speech
  • support the lips (esthetic)
  • guide mandible during movement
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6
Q

the longest incisor crown

A

the maxillary central incisor crown

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7
Q

three ____ reflect three labial developmental lobes for incisors (before wear)

A

mamelons

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8
Q

characteristics of ALL incisors from the facial view

A
  • relatively straight incisal edge
  • rectangular shape: longer incisocervically than mesiodistally
  • taper narrower from contact to CEJ
  • CEJ curves toward the apex
  • root tapers to apex and is longer than the crown
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9
Q

characteristics of all incisors EXCEPT mandibular centrals from the facial view

A
  • distal crown surface is more convex than mesial
  • mesioincisal line angle is sharper than distoincisal
  • distal contact located more cervically than on mesial
  • incisal edges slope cervically to distal
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10
Q

characteristics of ALL incisors from the lingual view

A
  • lingual surface narrower (seen best incisally)
  • marginal ridges converge toward cingulum
  • lingual fossa
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11
Q

Characteristics of ALL incisors from the proximal views

A
  • wedge shaped (triangular) outline
  • height of contour in cervical third both facially and lingually (cingulum)
  • lingual outline is “S” shaped
  • CEJ curves incisally
  • root tapers to apex
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12
Q

characteristics of ALL incisors from the incisal view

A
  • concave lingual fossa incisal to cingulum
  • incisal edge runs across between widest points on mesial and distal
  • labial outline is broader (less convex) than lingual
  • marginal ridges converge toward cingulum
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13
Q

mandibular incisors (versus maxillary) have:

A
  • smaller crowns
  • flatter proximal outlines
  • contacts closer to incisal edge
  • roots relatively longer (compared to crowns)
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14
Q

mandibular incisors (vs maxillary) have relatively____ crowns ______ and ____ lingual surfaces

A

wider; faciolingually; smoother

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15
Q

mandibular incisors (vs maxillary) have incisal edges that are more likely ____ to the midroot axis

A

lingual

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16
Q

there is more incisal ridge faceting on the ____ of mandibular incisors vs ____ of maxillary incisors

A

labial; lingual

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17
Q

the maxillary central has a ___ and ____ crown than the maxillary lateral; from labial view

A

wider (2.0); longer (0.5)

18
Q

the maxillary later is relatively _____ mesiodistally (compared to max central); from labial view

A

narrower

19
Q

maxillary lateral is more often ____ or ____ (compared to maxillary central); from labial view

A

peg shaped; missing

20
Q

maxillary central has ____ angle at nearly a right angle

A

mesioincisal

21
Q

maxillary lateral has both ____ and _____ angles more rounded than on max centrals ; from the labial view

A

mesioincisal; mesiodistal

22
Q

central incisors have ____ shaped cross section, and lateral incisors have more of an ____ shaped cross section

A

triangular; oval

23
Q

Maxillary central incisor cingulum is more developed and is off center toward the _____ (best seen from incisal view); cingulum of lateral incisor is more ______

A

distal; centered

24
Q

Maxillary lateral incisor has the ______ appear ______ (more so than on centrals) due to slope of incisal edge toward distal, on central this is also due to distal placement of cingulum

A

distal marginal ridge; shorter than mesial

25
Q

Maxillary centrals (from distal view) may have distoincisal edge _____ to the axis due to ______ of incisal edge (shows better on incisal view)

A

lingual; distolingual twist

26
Q

Largest CEJ curve for all teeth is mesial of ______ (up to3.5 mm)

A

maxillary central incisor

27
Q

Both maxillary central and lateral incisors have the heights of contour (facial and lingual) in the ______

A

cervical third

28
Q

Maxillary central incisor root has a flatter _____ outline in the _____, then tapers

A

lingual; cervical third

29
Q

Both maxillary incisors have ____greater than the _____, but more so for the maxillary centrals

A

mesiodistal; faciolingual

30
Q

_____ are more equal for faciolingual and mesiodistal

A

maxillary lateral incisors

31
Q

Maxillary central incisor has a ____ outline from the incisal view (because the facial surface is flatter)

A

triangular crown

32
Q

Maxillary lateral has a more ____ or ____ outline from the incisal view

A

round; oval

33
Q

the mandibular lateral incisor crown is ____ than the central

A

larger

34
Q

on the mandibular central incisor, the ____ angle = the ____ angle

A

distoincisal; mesioincisal

35
Q

on the mand. Lateral incisor, the _____ angle more rounded than _____ angle

A

distoincisal; mesioincisal

36
Q

Mandibular lateral has mesial contact more _____ than distal

A

incisal

37
Q

_____ incisor roots appear to be longer relative to the crown than _____ incisor roots

A

mandibular; maxillary

38
Q

Mandibular lateral cingulum is more ____ to the midroot axis than on centrals (best seen incisally)

A

distal

39
Q

Mandibular lateral incisor (mesial view) has the _____ corner of the incisal edge showing lingually due to the ______; centrals do not

A

distolingual; distolingual twist

40
Q

in mandibular incisors, the CEJ curves toward incisal more on the ____than _____

A

mesial; distal

41
Q

Mandibular roots are much wider _____ than _____, especially compared to maxillary incisors

A

faciolingually; mesiodistally

Oral Anatomy (9 decks)

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