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Dental Morph > orientation and anatomical terms > Flashcards

orientation and anatomical terms Flashcards

(55 cards)

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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)

Study These Flashcards
A

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

24
Q

cervical line

Study These Flashcards
A

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

25
cingulum
a bulbous convexity on the cervical third of the lingual surface on an anterior tooth
26
contact area
that region of the mesial or distal surface of a tooth that touches the adjacent tooth in the same arch
27
crown
that portion of a tooth, covered in enamel, which is normally visible in the oral cavity
28
cusp
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
embrasure
a v-shaped space between the proximal surfaces of two adjoining teeth in contact
30
fissure
a cleft or crevice in a tooth surface thought to result from the imperfect fusion of the enamel of adjoining cusps or lobes
31
fossa
a rounded or angular depression on the surface of a tooth... there are three common types (lingual, central, triangular)
32
lingual fossa
a broad, shallow depression on the lingua surface of an incisor or canine
33
central fossa
a relatively broad, deep angular valley in the central portion of the occlusal surface of a molar
34
triangular fossa
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
groove
a shallow, linear depression on the surface of a tooth... two common types (developmental and supplemental)
36
developmental groove
marks the boundaries between adjacent cusps and other major divisional parts of a tooth
37
supplemental groove
an indistinct linear depression, irregular in extent and direction which does not demarcate major divisional portions of a tooth
38
lobe
a major division of a tooth believes to be formed during development from a separate center of calcification
39
mamelon
a rounded or conical prominence on the incisal edge of a newly erupted incisor
40
proximal root concavity
a depression extending longitudinally on the mesial or distal surface of an anterior or posterior tooth
41
pit
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
ridge
a linear elevation on the surface of a tooth
43
marginal ridges
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
triangular ridges
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
cusp ridges
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
incisal ridge
the incisal portion of a newly erupted anterior tooth
47
oblique ridge
an elevated prominence on the occlusal surfaces of a maxillary molar extending obliquely between the tips of the distobuccal and mesiolingual cusps
48
transverse ridge
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
root
that portion of tooth normally embedded in the alveolar process and covered with cementum
50
root bifurcation
that point at which a root trunk divides into two separate branches
51
root trifurcation
that point at which a root trunk divides into three separate branches
52
root trunk (base)
that portion of a multi-rooted tooth between the cervical line and bifurcation or trifurcation of the separate roots
53
sulcus
an elongated valley in the surface of a tooth formed by the inclines of adjacent cusps or ridges which meet at an angle
54
thirds
imaginary divisions of a tooth crown or root as to length or mesiodistal breadth
55
tubercle
a slightly rounded elevation on the surface of a tooth

Dental Morph (8 decks)

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