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BDS2 Oral Biology > PERMANENT ANTERIOR TOOTH MORPHOLOGY - Maxillary incisors > Flashcards

PERMANENT ANTERIOR TOOTH MORPHOLOGY - Maxillary incisors Flashcards

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1
Q

Name developmental lobes A-D

A
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2
Q

What is the lingual/palatal lobe called?

A

cingulum

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3
Q

How many developmental lobes are there?

A

4

3 Labial lobes
1 Lingual/palatal lobe (cingulum)

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4
Q

What are the anterior secondary teeth called?

A

all succedaneus

(replace primary teeth)

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5
Q

How many roots do the anterior teeth have?

A

1

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6
Q

How would you describe the shape of the mesial/distal view of anterior teeth?

A

triangular

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7
Q

How would you describe the shape of the labial/palatal view of anterior teeth?

A

trapezoidal

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8
Q

What is the interproximal view?

A

side on

mesial/distal view

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9
Q

What letter represents the palatal developmental lobe of the anterior teeth?

A

A = CINGULUM

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10
Q

Name structures B and C (palatal surface)

A

A = mesial marginal ridge
B = distal marginal ridge

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11
Q

What are the largest mesial/distal incisor teeth ?

A

the maxillary 1s

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12
Q

When do maxillary central incisors erupt?

A

7-8 years

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13
Q

What do you call the grooves highlighted here? (maxillary central incisor)

A

developmental depressions

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14
Q

Name structures A-C (central maxillary incisal)

A

A = distal labial lobe
B = middle labial lobe
C = mesial labial lobe

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15
Q

Name structures A and B (maxillary central incisal)

A

A = disto-incisal angle
B = mesio-incisal angle

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16
Q

Where is the imbrication line of the central incisal maxillary teeth?

A

groove, where the anatomical crown moves towards the root of the tooth

17
Q

Name structure A

A

PALATAL FOSSA

18
Q

What is the role of the palatal fossa?

A

guide food towards back of the mouth

19
Q

What can form in the palatal fossa?

A

palatal groove
palatal pit

20
Q

What tooth is shown here?

A

maxillary central incisors

21
Q

What is characteristic of the maxillary central incisal mesial surface?

A

deep CEJ curvature

22
Q

Where is the mesial contact point in the maxillary central incisors?

A

in the incisal 1/3 of the crown

bottom arrow

23
Q

Where is the distal contact point in the maxillary central incisors?

A

junction of the incisal and middle 1/3

24
Q

What is the long axis of a tooth?

A

crown to root tip

25
Q

What is the orientation of the maxillary central incisor?

A

Incisal edge is labial to long axis.

26
Q

What does the incisal edge being labial to long axis mean?

A

the incisors protrude out form the long axis to towards the labial surface

27
Q

Describe the features of the maxillary central incisor shown here

A

Incisal edge is labial to long axis.
Longer mesial marginal ridge (brown).
Distally displaced cingulum (red)
Labio-incisal edge (arrow)
Incisal ridge (blue)

28
Q

When do the maxillary lateral incisors erupt?

A

8 and 9

29
Q

How does the lateral incisor differ from the central incisor?

A

Resembles the central incisor in all views but the crown is smaller and more rounded.

30
Q

In the lateral incisal teeth, which is sharper. the disto-incisal angle or the mesio-incisal angle?

A

mesio-incisal angle

31
Q

Do the lateral or central incisors have a deeper palatal fossa?

A

maxillary lateral incisors

32
Q

How does the cingulum differ between the lateral and central incisors?

A

the lateral incisor is cingulum is narrower

33
Q

Do the lateral or central incisors have more chance of palatal pits forming?

A

the lateral incisors

form grooves and risks of caries

34
Q

What is a palatogingival groove?

A

They originate in the lingual pit and extend cervically towards gingiva. More common on the lateral incisor

may extend onto root surface

35
Q

Where does the palatogingival groove usually originate?

A

the palatal pit

36
Q

Compare the maxillary lateral and central incisors from a proximal point of view?

A

The same

MAXILLARY LATERAL INCISORS SHOWN

37
Q

Describe the labial surface of the lateral incisor

A

more rounded labial surface than 1s

38
Q

Compare the lateral and central incisor’s cingulum distally

A

central - displaced
lateral - central (due to narrower surface)

39
Q

Name structures A-G of the maxillary lateral incisors

A

BDS2 Oral Biology (27 decks)

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