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Dental Anatomy > Maxillary Incisors > Flashcards

Maxillary Incisors Flashcards

1
Q

Class Traits

A
  • Used for cutting
  • Generally flat with a horizontal biting edge
  • Usually single rooted
  • Permanent incisors are the only teeth with mamelons
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2
Q

Developmental Lobes

A

Four developmental, three facial (mesial, middle, distal) and one lingual

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3
Q

Functions

A
  • Cut food
  • Articulate speech
  • Help to support the lip and maintain an esthetic appearance
  • Anterior guidance
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4
Q

The mesial CEJ line is usually (more OR less) incisally positioned than the distal CEJ line

A

More

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5
Q

The roots frequently incline/curve (mesially OR distally)

A

Distally

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6
Q

The distal crown contours are usually (more OR less) rounded than the mesial

A

More

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7
Q

The distal contact areas appear (more OR less) gingivally positioned

A

More

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8
Q

Eruption Age

A

Approximately age 7

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9
Q

Crown to Root Ratio

A

1 : 1.5

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10
Q

On the facial aspect of a maxillary central incisor, the crown is slightly (shorter OR longer) incisocervically than mesiodistally

A

Longer

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11
Q

On the facial aspect of a maxillary central incisor, the root is:

A
  • Conical and straight

- May incline distally

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12
Q

On the facial aspect of a maxillary central incisor, the mesial outline is:

A
  • Relatively straight

- Contact at the incisal 1/3

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13
Q

On the facial aspect of a maxillary central incisor, the distal outline is (more OR less) rounded with contact at the ______ and _______ thirds

A
  • More

- Incisal and Middle thirds

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14
Q

On the facial aspect of a maxillary central incisor, the incisal edge is:

A
  • Straight

- Has 3 mamelons, one for every developmental lobe

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15
Q

On the facial aspect of a maxillary central incisor, the mesio-incisal angle is (sharp OR not sharp)

A

Sharp

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16
Q

On the facial aspect of a maxillary central incisor, the distoincisal angle is (more OR less) rounded than the mesio-incisal angle

A

more

17
Q

Developmental depressions on the facial aspect of a maxillary central incisor

A
  • Two
  • Shallow
  • Between the three facial lobes
  • More evident on a newly formed tooth
18
Q

Facial Height of Contour of a maxillary central incisor

A

The cervical 1/3 of the facial surface that is smoothly convex

19
Q

The lingual aspect of a maxillary central incisor is (narrower OR wider) than the facial aspect mesiodistally

A

Narrower

20
Q

The location of the cingulum of a maxillary central incisor

A
  • Cervical 1/3 of the lingual aspect
  • Typically falls distally by just a little
  • Happens to be the lingual height of contour
21
Q

Lingual fossa of a maxillary central incisor

A

shallow concavity bordered by the incisal edge, cingulum, and the mesial and distal marginal ridges

22
Q

Developmental grooves of a maxillary central incisor

A
  • Not always, but if there are, they are in the fossa and lingual pit
  • Fossa will not be completely smooth
  • More common in the lateral than central incisors
23
Q

On the mesial aspect of a maxillary central incisor, the crown is:

A

Roughly triangular or wedge-shaped

24
Q

On the mesial aspect of a maxillary central incisor, the incisal tip and root apex BOTH fall on the _________ line

A

Bisecting

25
Q

Height of Contour on the mesial aspect of a maxillary central incisor

A
  • There are two, the facial and lingual

- Both fall in the cervical 1/3

26
Q

On the mesial aspect of a maxillary central incisor, the CEJ line:

A
  • Curves greatly toward incisal, more than any other tooth of proximal surface
  • Most incisally position/pronounced than any other tooth
27
Q

Due to the turn of the tooth along the arch, on the mesial aspect of a maxillary central incisor, (all OR none) of the lingual convexities are visible

A

All

28
Q

The distal aspect of a maxillary central incisor is (shorter OR longer) incisocervically than the mesial

A

Shorter

29
Q

On the distal aspect of a maxillary central incisor, the CEJ line is (more OR less) pronounced than the mesial

A

More

30
Q

On the distal aspect of a maxillary central incisor, the contact area is (more OR less) cervically positioned than the mesial

A
  • More

- At the junction of the incisal and middle thirds

31
Q

Due to the turn of the tooth along the arch, on the distal aspect of a maxillary central incisor, you see (more OR less) of the facial surface of the crown

A
  • More

- Also, you cannot see the mesial marginal ridge

32
Q

The lingual aspect of a maxillary central incisor is roughly triangular and is (wider OR narrower) mesiodistally than faciolingually

A

Wider

33
Q

Incisal ridge

A
  • Only called ridge when newly erupted

- Overtime it becomes flattened and then is called edge

34
Q

On the incisal aspect of a maxillary central incisor, the proximal contacts are located:

A
  • In the middle of the middle 1/3 of the crown and in line with the incisal ridge
  • The proximal contact areas increase with size
35
Q

From the incisal view of a maxillary central incisor, you can see the following features of the lingual surface:

A
  • Cingulum
  • Mesial marginal ridge
  • Distal marginal ridge
  • Lingual fossa

Dental Anatomy (3 decks)

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