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115 Oral, Head And Neck Anatomy > Permanent Anterior Teeth > Flashcards

Permanent Anterior Teeth Flashcards

1
Q

General characteristics of the maxillary incisors

A

Arch is stationary
Function in mastication is to cut, sheer, punch and bite
Aesthetic value

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2
Q

What is the difference between the lateral and central maxillary incisors in terms of size

A

Crown on the central incisors are larger but the roots are the same length

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3
Q

Why don’t we usually see Mamelon on the teeth

A

We see them during the developmental stage but they usually wear away from functional occlusion

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4
Q

What are perikmata

A

Slight grooves that run mesial to distal on the maxillary central incisors and usually wear after irruption

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5
Q

What is the labioincisal edge

A

Junction of the labial surface and incisal edge

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6
Q

What is the linguoincisal edge

A

Junction of the lingual aspect and incisal edge

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7
Q

What is the height of contour on the mesial surface of a central incisor? Describe the mesial line and incisal angles

A

Contact area between adjacent teeth. Just apical to the incisal ridge

Line angle is straight and incisal angle is sharp

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8
Q

 what is the height of contour on a maxillary central incisor? Describe the distal line and incisal angles

A

Contact area apical to the junction of the incisal and middle thirds of adjacent teeth

Line angle is curved, incisal angle is more rounded

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9
Q

Describe the CEJ of a maxillary central incisor

A

Curves apically, centered over middle third of root

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10
Q

What is the cingulum and where is it located?

A

Fourth developmental lobe. Located in cervical third, slightly distal to the midline

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11
Q

What are marginal ridges?

A

Elevations on the mesial and distal surfaces of the labial aspect of the central incisors

Mesial is straighter and longer
Distal is curved and shorter

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12
Q

What is the lingual fossa

A

Concavity in the middle and incisal 1/3’s

Bordered by the mesial marginal ridge, the distal marginal ridge, cingulum and incisal ridge

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13
Q

What does the labiolingual midline do?

A

Divides the label and lingual halves

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14
Q

What is the lingual height of contour on a maxillary central incisor?

A

Middle of the cingulum

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15
Q

What is the labial height of contour on a maxillary central incisor

A

Middle third

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16
Q

What is the mesial height of contour on a maxillary central incisor

A

Broad in middle third

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17
Q

What is the distal height of contour on the maxillary central incisor

A

Narrow in the middle third

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18
Q

Which marginal Ridge on the maxillary central incisors is longer?

A

The mesial marginal ridge is slightly longer than the distal marginal ridge

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19
Q

What is the shape of the root of a maxillary central incisor?

A

Triangular cone with a blunt Apex, overall straight but tilts slightly to the distal

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20
Q

Location and number of pulp horns of a maxillary central incisor

A

 in the crown with 2 to 3 pulp horns

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21
Q

What is a Talon cusp?

A

Sharp, small extra cusp forms from the cingulum

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22
Q

What are mesiodens

A

Supernumerary Tooth, forms between maxillary central incisors in midline

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23
Q

What does Hawk billed mean

A

Incisal ridge centered over the lingual third

Normal specimen would have the incisal ridge centered in line with the root

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24
Q

What is an avulsion

A

Complete displacement of the tooth due to blunt trauma

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25
Q

What are Hutchinson incisors

A

Screwdriver shaped, notched incisal ridge, caused by congenital syphilis

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26
Q

What is the distal height of contour on the maxillary central incisor? Describe the distal line and incisal angles

A

Contact area just apical to the junction of the incisal and middle 1/3’s

Line angle is more curved, incisal angle is more rounded

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27
Q

what is the height of contour on the mesial surface of the maxillary lateral incisors? Describe the mesial Line and incisal angles

A

Contact area just incisal to the junction of the incisal and middle 1/3’s

Line angle is slightly more curved, incisal angle is not as sharp

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28
Q

Where is the lingual pit? What risk is associated with it?

A

May form at the base of the lingual fossa. Associated with risk of dental caries

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29
Q

Which marginal ridge is longer on the maxillary lateral incisors?

A

Mesial marginal ridge is longer and straighter while the distal marginal ridge is shorter and curved

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30
Q

Describe the incisal ridge in the incisal view of the maxillary lateral incisors

A

More curved, just labial to the labial lingual midline

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31
Q

What is the shape of the root in a maxillary lateral incisor

A

Oval and tapers. Apical third usually curves to the distal

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32
Q

Where do we see the root depression on a maxillary lateral incisor

A

Prominent on the distal

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33
Q

Which direction does the CEJ curve on the mesial view of the maxillary lateral incisors

A

Curves incisally

34
Q

How does the CEJ curve on the distal view of the maxillary lateral incisor

A

Curves less incisally

35
Q

Describe the incisal Ridge on the label view of the maxillary lateral incisors

A

More curved

36
Q

Where is the CEJ on the labial view of the maxillary lateral incisors

A

Centered just distal to the midline

37
Q

Describe the developmental groove on the lingual view of the maxillary lateral incisors

A

If present it is often very deep and may extend onto the root. Has periodontal and caries risk

38
Q

Which tooth varies inform more than any other tooth except for the third molar

A

Maxillary lateral incisors

39
Q

What are peg lateral teeth

A

Condition where the maxillary lateral incisors are underdeveloped and small

Likely a congenital defect caused by congenital syphilis

40
Q

What does dens in Dente mean?

A

Occurs when the tooth’s enamel folds into the Dentin during development

May leave a deep lingual pit

41
Q

What is the function of mandibular incisors?

A

Mastication- movable cutting bar

Incise, punch and cut

42
Q

Mandibular incisors are the smallest Teeth in mesial to distal, but wider label to lingual. Why is this?

A

Because the masticatory force is greatest in the labial lingual direction

43
Q

Which of the mandibular central incisors are the smallest?

A

Central incisors are slightly smaller than laterals

44
Q

Which are the first succedaneous/permanent teeth to erupt?

A

Mandibular central incisors

45
Q

What occurs from incisal wear on the mandibular central/lateral incisors

A

excessive attrition and dentin exposure

46
Q

Which anterior teeth are a high incidence area for bio film and calculus?

A

Mandibular central and lateral incisors

47
Q

Describe the incisal Ridge of the mandibular central incisors

A

Fan shaped, centered over the route and bilaterally symmetrical to the long axis

48
Q

Location of the CEJ on the labial

View the mandibular central incisors

A

Centered over the midline

49
Q

Describe the line angles of the mandibular central incisors

A

The mesial and distal line angles are relatively straight

50
Q

Describe the incisal angles of the mandibular central incisors

A

Both mesial and distal are close to 90° angles

51
Q

Describe the cingulum, lingual Fossa and marginal ridges of them mandibular central incisors

A

Cingulum is centered over the root and not prominent

Lingual fossa is very shallow and almost flat

Marginal ridges are not prominent

52
Q

Describe the CEJ on the Mesial view of the mandibular central incisors?

A

Curves incisally about 3 mm

53
Q

Describe the CEJ on the distal view of the mandibular central incisors

A

Curves less incisally by 2 mm

54
Q

Where are the proximal route depressions on the mandibular central incisors and what do they look like?

A

Found on both the mesial and distal surfaces, gives The root a ribbon/bow shape

55
Q

What is a variation that may occur in the root of the mandibular central and lateral incisors

A

May bifurcate

56
Q

Describe the cingulum on the lingual surface of the mandibular lateral incisor 

A

Slightly tilted to the distal

57
Q

Describe the CEJ on the mesial and distal surfaces of the mandibular lateral incisors

A

Mesial curves incisally about 3 mm

Distal curves incisally only 2 mm

58
Q

Describe the incisal ridge on the distal aspect of the incisal view Of the mandibular lateral incisor

A

Curves lingually, appears twisted on it’s a long axis

59
Q

Describe the route depression on the distal aspect of the root of the mandibular lateral incisor

A

Very deep root depression

60
Q

What is the function of the canines

A

To pierce and tear, supports incisors and pre-molars

61
Q

What makes the canines the most stable Tooth in Dentition

A

The labial/lingual width of the crown and root

62
Q

What gives the canines the greatest Anchorage

A

Longest routes in Dentition

63
Q

Which tooth has the greatest longevity of any tooth in the Dentition

A

Canines

64
Q

What can cause canines to become impacted?

A

Anterior crowding and may develop cysts (developmental/dentigerous cysts)

65
Q

Describe the CEJ on the label view of the maxillary canines

A

Curves apically, often has an elevated, rolled enamel border

66
Q

Describe the medial aspect of the maxillary canine on the labial view

A

Is convex and may have a slight concavity above the contact

67
Q

Describe the distal aspect of the maxillary canine from the labial view

A

Concave from CEJ to contact then convex

68
Q

Which cusp slope is shorter on the maxillary canines

A

Mesial‘s cusp slope is shorter, distal cusp slope is longer

69
Q

What occurs from maxillary canine incisal wear

A

Cusp tip moves distally and mesial cusp slope lengthens

Lingual cusp surface shows wear due to occlusion

70
Q

Describe the width of the maxillary canines from the lingual view

A

Crown and root are narrow on the lingual aspect

71
Q

Does the CEJ curve more incisally on the mesial or distal view of anterior teeth?

A

More on the mesial view

72
Q

Why is the lingual aspect of the root of the maxillary canine narrow?

A

To accommodate the curve of the arch

73
Q

Describe the apical third of the root of the maxillary canine

A

May curve sharply mesially or distally but distal is most common

74
Q

What is the function of route depressions in the maxillary canines? On which surface is it most pronounced?

A

Aid in anchoring the route and preventing tooth rotation

More pronounced on the distal surface

75
Q

Describe the pump chamber and pop canal in the root of the maxillary canine

A

Pulp chamber is in the crown with one rounded or two pulp horns

One pulp canal with an oval shape

76
Q

Are the mandibular canine crowns wider or narrower mesial to distal on the labial view?

A

Crown is narrower mesial to distal

77
Q

Are the mandibular or maxillary canines longer from cusp tip to CEJ?

A

Mandibular crowns are longer

78
Q

Describe the lingual view of the mandibular canines

A

Flatter, resemble the mandibular lateral incisors, languages are not prominent

79
Q

What occurs from mandibular incisal where of the canines

A

Cusp tip moves immediately and distal cusp slope lengthens

Mandibular King aspec Prussia Ohhhh is where on the labial surface, maxillary cusp wears more lingually

80
Q

Possible variation of the mandibular canines

A

Made bifurcate on the apical third

115 Oral, Head And Neck Anatomy (25 decks)

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