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Dental Anatomy > Incisor Comparisons > Flashcards

Incisor Comparisons Flashcards

1
Q

Numbers of the maxillary incisors, from quadrant 1 to 2

A
  1. 2
  2. 1
  3. 1
  4. 2
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2
Q

3 variations of norm for Maxillary central incisors (buccal view)

A

Triangular

Ovoid (thought to be female)

Square (thought to be male)

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3
Q

Maxillary muccal view: Compare crown form of central vs. lateral incisor

A

Central = square

Lateral = oblong

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4
Q

Maxillary Buccal view: Compare crown and root dimensions of lateral and central incisor

A
  • Lateral smaller M-D
  • Lateral shorter I-C by approx. 2 mm
  • Crown and root are closer in length on central incisor
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5
Q

Maxillary Buccal view: Compare incisal edge form of central and lateral incisors

A

Lateral = more curved, central = straighter

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6
Q

Maxillary Buccal view: Compare mesio-incisal and disto-incisal angles

A

Lateral = more rounded

Central = M-A angle sharper (more square) than D-I angle

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7
Q

Maxillary Buccal view: Compare proximal surface forms

A

More convex on lateral incisor

Straighter on central incisor

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8
Q

Maxillary Buccal view: Compare proximal contacts of central and lateral incisors

A

Mesial and distal contacts are located farther cervically on lateral incisor

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9
Q

Maxillary Buccal view: Compare root apex form of central and lateral incisors

A
  • Sharper on lateral incisor
  • Curves distally on lateral incisor
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10
Q

Theory to explain distal curve of root on lateral incisor

A

As teeth reupt, jaw grows forward and tooth continues to grow with jaw

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11
Q

Maxillary Palatal view: Compare cingulum form of central and lateral incisor

A

Central incisor has a broader M-D cingulum with smooth convex surface

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12
Q

Maxillary Palatal View: Compare marginal ridge prominence of central and lateral incisors

A

M and D ridges more prominent on lateral incisor

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13
Q

Maxillary Palatal view: Compare lingual fossa of central and lateral incisors

A

Smaller and deeper on lateral incisor

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14
Q

Maxillary Palatal view: compare lingual pit/groove of central and lateral incisors

A

More commonly found on lateral incisor

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15
Q

Maxillary Mesial view: compare crown size of central and lateral incisors

A

Central incisor has larger B-Li and I-C crown dimensions (on right)

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16
Q

Maxillary Mesial view: Compare cervical line curvature of lateral and central incisors

A

Less curvature on lateral incisor (on left)

More prominent on central incisor (on right)

17
Q

Maxillary mesial view: compare incisal edge thickness of central and lateral incisors

A

Thicker B-Li dimension on lateral incisor

18
Q

Maxillary mesial view: compare triplanar buccal surface of central and lateral incisors

A

Emergence profile is more prominent on central incisor

In general:

  • Middle-half is straight with slight convexity
  • Incisal half slopes toward incisal edge
19
Q

Maxillary incisal view: compare the buccolingual crown dimension of the central and lateral incisors

A

Smaller on lateral incisor

20
Q

Maxillary incisal view: compare the surface convexity of the lateral and central incisors

A

More convex on lateral incisor

21
Q

Maxillary incisal view: compare the M-B and D-B line angles of the central and lateral incisors

A

More rounded on lateral incisor (i.e. less angular)

22
Q

Mandibular buccal view: compare the crown dimensions of the lateral and central incisors

A

Lateral incisor crown has larger M-D and I-C dimensions

23
Q

Mandibular buccal view: compare the incisal edge form of the central and lateral incisors

A

Straight on central incisor

More curvature toward the distal on lateral incisor

24
Q

Mandibular buccal view: compare the distoincisal angle of the central and lateral incisors

A

Slightly more rounded on the lateral incisor

25
Q

Mandibular buccal view: compare the distal proximal contact of the central and lateral incisors

A

Slightly more cervical on lateral incisor

26
Q

Mandibular buccal view: compare the distal surface convexity of the lateral and central incisors

A

More convex on the lateral incisor

27
Q

Mandibular buccal view: Compare root length

A

Longer on lateral incisor

28
Q

Manidbular buccal view: compare root width

A

Wider on lateral incisor

29
Q

Mandibular mesial view: Compare the buccolingual and root dimensions

A

Larger on lateral incisor

30
Q

Mandibular distal view: compare the distal proximal contact

A

Slightly more cervical on lateral incisor

31
Q

Mandibular incisal view: compare the incisal edge to buccolingual bisector

A

Perpendicular relationship on central incisor (mesiodistal symmetry)

32
Q

Mandibular incisal view: crown rotation on root comparison

A

Crown of lateral incisor appears rotated distally on root

33
Q

Mandibular incisal view: compare the crown symmetry

A

Central incisor is symmetrical

Laterla incisor is not due to rotation

34
Q

Profile of maxillary central incisor

A

Red = emergence profile

Black = central

Green = incisal

Dental Anatomy (6 decks)

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