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My Oral Anatomy > Terms Of Orientation > Flashcards

Terms Of Orientation Flashcards

1
Q

Portion of the tooth that is covered with enamel and projects from the tissues in which the root is fixed

A

Crown

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2
Q

Difference between anatomical and clinical crown

A

Anatomical: part of the tooth covered by enamel
Clinical: part of the crown of a tooth that is visible in the oral cavity; varies with level of gingival margin around tooth

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3
Q

Portion of a tooth that is embedded in the alveolus and covered by cementum

A

Root

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4
Q

Difference between the anatomical and clinical root

A

Anatomical: part of tooth that is covered with cementum
Clinical: part of the tooth that is not visible in the mouth

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5
Q

Unworn surface formed by the junction of the labial and lingual surfaces of anterior teeth

A

Incisal ridge

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6
Q

Surface formed on the incisal ridge after wear has taken place

A

Incisal surface

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7
Q

Edge formed by junction of axial surfaces and incisal surfaces of anterior teeth

A 
Incisal edge
Labia-
Lingo-
Mesio-
Disto-
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8
Q

Surface of teeth facing towards adjoining teeth in the same dental arch

A

Proximal

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9
Q

Pertaining to the neck

A

Cervical

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10
Q

Touching of two surfaces of adjacent teeth

A

Proximal contact

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11
Q

Point on the proximal surface of a tooth, which touches an adjacent tooth

A

Contact point

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12
Q

Area of contact caused by the proximal attrition of one tooth with that of another in the same dental arch

A

Contact area

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13
Q

Imaginary line/angle formed by the junction of two crown surfaces

A

Line angle

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14
Q

Point which is the junction of three crown surfaces

A

Point angle

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15
Q

Root termination/tip

A

Apex

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16
Q

How many roots do anterior teeth have?

A

One

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17
Q

Two roots

A

Bifurcation

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18
Q

Three roots

A

Trifurcation

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19
Q

Small rounded projection found on the crowns of teeth
Extra formation of enamel
Not normal/typical

A

Tubercle

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20
Q

Where is the most likely location to find a tubercle?

A

Lingual surface of maxillary anterior teeth

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21
Q

Lingual prominence of enamel on anterior teeth, rising incisally from the cervical line in varying proportions

A

Cingulum

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22
Q

One of the three rounded prominences on the incisal ridge of a newly erupted unworn incisor

A

Mamelon

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23
Q

Pronounced point/elevation on/near masticating surface of the crown of a tooth

A

Cusp

24
Q

Ridge/elevation of enamel on the mesial and distal margin of the occlusal surfaces of premolars and molars, and the lingual surfaces on incisors and canines

A

Marginal ridge

25
Q

Ridge running from the point of a cusp toward the central portion of the occlusal surface of a posterior tooth
Named after the cusp to which they belong

A

Triangular ridge

26
Q

Ridge formed by two triangular ridges, which join to form a continuous elevation of enamel across the occlusal surface of some posterior teeth

A

Transverse ridge

27
Q

Ridge running obliquely across the occlusal surface of the maxillary molars
Formed by the union of the triangular ridge of the disto-buccal cusp with the distal cusp ridge of the mesio-lingual cusp

A

Oblique ridge

28
Q

Elevation of enamel running from the point of a cusp toward the proximal surface

A

Cusp ridge

29
Q

Any prominent ridge of enamel immediately adjacent to the cervical line

A

Cervical ridge

30
Q

Elevation of enamel on the axial surfaces of a tooth running from the point of a cusp or the incisal edge toward the cervical line
Usually applied to facial or lingual surfaces

A

Developmental ridge

31
Q

Round or angular depression occurring mostly on the lingual surfaces of the anterior teeth and on the occlusal surfaces of premolars and molars

A

Fossa

32
Q

V-shaped channel or depression on the occlusal surface of a tooth formed by the inclines of adjacent cusps or ridges which meet at an angle cervically

A

Sulcus

33
Q

Groove on a tooth formed during the appositional growth of enamel, dentin, and cementum
Denotes the coalescence of the primary parts, of lobes of the crown of a tooth

A

Developmental groove (primary)

34
Q

An auxiliary groove, which branches from the developmental groove
Location not related to the junction of primary tooth parts

A

Supplemental groove (secondary)

35
Q

Cleft/crevice in a tooth surface thought to result from the imperfect fusion of the enamel of adjoining cusps/lobes

A

Fissure

36
Q

Sharp pointed depression at the base of a fossa in the enamel of a tooth
Usually occurs at the junction of two or more developmental grooves and at the end of grooves on the axial surfaces

A

Pit

37
Q

Plane that extends antero-posteriorly and medio-laterally

Perpendicular to the capital and coronal planes

A

Horizontal plane

38
Q

Vertical plane that extends medio-laterally and superio-inferiorly
Parallel to coronal suture of skill
Perpendicular to horizontal and sagittal planes

A

Coronal plane

39
Q

Vertical plane extending antero-posteriorly and superio-inferiorly
Parallel to sagittal suture of skull
Perpendicular to horizontal and coronal planes

A

Sagittal plane

40
Q

Most anterior line of mid-sagittal plane

A

Median line

Midline

41
Q

How are line angles named?

A

Names of two adjoining crown surfaces
Proximal named first (mesial, distal)
Occlusal/incisal always last

42
Q

How are point angles named?

A

Takes name of the three crown surfaces
Proximal first - mesial/distal
Axial second - buccal/labial/facial/lingual
Occlusal or incisal last

43
Q

What helps define the embrasure?

A

Line and point angles

44
Q

How many roots to anterior teeth normally have?

A

One

45
Q

How many roots do posterior teeth mostly have?

A

Multiple - 2 or 3

46
Q

Most likely location for tubercles?

A

Lingual surface of maxillary anterior teeth

47
Q

Which teeth have a cingulum?

A

Anterior teeth

48
Q

Which teeth have cusps? How many?

A

Incisors - 0
Premolars - 2-3
Molars - 4 or more

49
Q

Which teeth have marginal ridges?

A

All

50
Q

Which teeth have transverse ridges?

A

Some posterior teeth

51
Q

Which teeth have oblique ridges?

A

Maxillary molars

52
Q

Which teeth have cusp ridges?

A

Only those teeth with cusps

Canines, premolars, molars

53
Q

Which teeth have a fossa?

A

All

54
Q

Which teeth have a lingual fossa?

A

Anterior teeth

55
Q

Which teeth have triangular fossa?

A

Premolars and molars

56
Q

Which teeth have a central fossa?

A

Molars

57
Q

Which teeth have a sulcus?

A

Premolars and molars

My Oral Anatomy (18 decks)

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