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Dental Morph > orientation and anatomical terms > Flashcards

orientation and anatomical terms Flashcards

1
Q

angle

A

junction of two or more surfaces

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2
Q

apex

A

terminal end or tip of a root

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3
Q

apical

A

toward the apex of a root

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4
Q

axial

A

pertaining to the longitudinal (long) axis of the tooth
(examples - labial, buccal, lingual, mesial, distal)

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5
Q

axial root center

A

imaginary line passing through geometric center of a tooth root parallel to its long axis

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6
Q

buccal

A

next to or towards the cheek

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7
Q

buccal surface

A

surface of a posterior tooth positioned immediately adjacent to the cheek

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8
Q

distal

A

away from the median line

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9
Q

distal surface

A

surface of a tooth facing away from the median line following the curve of the dental arch

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10
Q

facial surfaces

A

refers to the labial and buccal surfaces collectively

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11
Q

labial

A

next to or toward the lips

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12
Q

labial surface

A

surface of an anterior tooth positioned immediately adjacent to the lip

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13
Q

lingual

A

next to or toward the tongue

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14
Q

lingual surface

A

surface of an anterior tooth positioned immediately adjacent to the tongue

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15
Q

line angle

A

angle formed by the junction of TWO surfaces along a line (mesiobuccal angle)

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16
Q

mesial

A

toward the median line

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17
Q

mesial surface

A

surface of a tooth facing toward the median line following the curve of the dental arch

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18
Q

occlusal

A

toward the biting surface of a posterior tooth

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19
Q

occlusal suface

A

surface of a premolar or molar within the marginal ridges which contacts the corresponding surfaces of antagonists during closure of the posterior teeth

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20
Q

point angle

A

angle formed by the junction of THREE surfaces at a point

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21
Q

proximal surface

A

surface of a tooth which faces toward an adjoining tooth in the same arch (mesial and distal surfaces are proximal surfaces)

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22
Q

cementoenamel junction

A

a junction of enamel and cementum (cervical line)

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23
Q

cervix (neck)

A

a narrow or constricted portion of a tooth in the region of the junction of crown and root

24
Q

cervical line

A

a curved line formed by the junction of enamel and cementum of a tooth

25
Q

cingulum

A

a bulbous convexity on the cervical third of the lingual surface on an anterior tooth

26
Q

contact area

A

that region of the mesial or distal surface of a tooth that touches the adjacent tooth in the same arch

27
Q

crown

A

that portion of a tooth, covered in enamel, which is normally visible in the oral cavity

28
Q

cusp

A

1) a pronounced elevation on the occlusal surface of a tooth terminating in a conical, rounded, or flat surface

2) any crown elevation which begins calcification as an independent center

29
Q

embrasure

A

a v-shaped space between the proximal surfaces of two adjoining teeth in contact

30
Q

fissure

A

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

31
Q

fossa

A

a rounded or angular depression on the surface of a tooth… there are three common types (lingual, central, triangular)

32
Q

lingual fossa

A

a broad, shallow depression on the lingua surface of an incisor or canine

33
Q

central fossa

A

a relatively broad, deep angular valley in the central portion of the occlusal surface of a molar

34
Q

triangular fossa

A

a comparatively shallow, pyramid-shaped depression on the occlusal surfaces of posterior teeth located just within the confines of the mesial and/or distal marginal ridges

35
Q

groove

A

a shallow, linear depression on the surface of a tooth… two common types (developmental and supplemental)

36
Q

developmental groove

A

marks the boundaries between adjacent cusps and other major divisional parts of a tooth

37
Q

supplemental groove

A

an indistinct linear depression, irregular in extent and direction which does not demarcate major divisional portions of a tooth

38
Q

lobe

A

a major division of a tooth believes to be formed during development from a separate center of calcification

39
Q

mamelon

A

a rounded or conical prominence on the incisal edge of a newly erupted incisor

40
Q

proximal root concavity

A

a depression extending longitudinally on the mesial or distal surface of an anterior or posterior tooth

41
Q

pit

A

a sharp, pointed depression usually located at the junction of tow or more intersecting developmental grooves or at the termination of a single developmental groove

42
Q

ridge

A

a linear elevation on the surface of a tooth

43
Q

marginal ridges

A

elevated crests which form the mesial and distal margins of (a) the occlusal surfaces of posterior teeth and (b) the lingual surfaces of anterior teeth

44
Q

triangular ridges

A

prominent elevations, triangular in cross-section which extend from the tip of a cusp towards the central portion of the occlusal surface of a tooth

45
Q

cusp ridges

A

elevations which extend in a mesial and distal direction form cusp tips… cusp ridges form the buccal and lingual margins of the occlusal surfaces of posterior teeth

46
Q

incisal ridge

A

the incisal portion of a newly erupted anterior tooth

47
Q

oblique ridge

A

an elevated prominence on the occlusal surfaces of a maxillary molar extending obliquely between the tips of the distobuccal and mesiolingual cusps

48
Q

transverse ridge

A

made up of the triangular ridges of a buccal and a lingual cusp which join to form a more or less continuous elevation extending transversely across the occlusal surface of a posterior tooth

49
Q

root

A

that portion of tooth normally embedded in the alveolar process and covered with cementum

50
Q

root bifurcation

A

that point at which a root trunk divides into two separate branches

51
Q

root trifurcation

A

that point at which a root trunk divides into three separate branches

52
Q

root trunk (base)

A

that portion of a multi-rooted tooth between the cervical line and bifurcation or trifurcation of the separate roots

53
Q

sulcus

A

an elongated valley in the surface of a tooth formed by the inclines of adjacent cusps or ridges which meet at an angle

54
Q

thirds

A

imaginary divisions of a tooth crown or root as to length or mesiodistal breadth

55
Q

tubercle

A

a slightly rounded elevation on the surface of a tooth

Dental Morph (8 decks)

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