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55 Cards in this Set
- Front
- Back
incisal ridge
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the incisal portion of a newly erupted anterior tooth
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oblique ridge
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an elevated prominence on the occlusal surfaces of a maxillary molar extending obliquely between the tips of the distobuccal and mesiolingual cusps
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tranverse ridge
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made up of the triangular ridges of a buccal and a lingual cusp which join to form a more or less continuous elevation extending tranversely across the occlusal surface of a posterior tooth
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root
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that portion of a tooth normally embedded in the alveolar process and covered with cementum
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root bifurcation
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that point at which a root trunk divides into two separate branches
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root trifucation
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that point at which a root trunk divdies into three separate branches
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root trunk (base)
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that portion of a multirooted tooth between the cervical line and bifurcation or trifurcation of the separate roots
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sulcus
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an elongated valley in the surface of a tooth formed by the incines of adjacent cusps or ridges which meet at an angle
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thrids
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imaginary division of a tooth crown or root as to length (ie, occlusal, middle, and gingival _____ ) or mesiodistal breadth (ie, mesial, middle, and distal _____ )
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tubercle
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a slightly rounded elevation on the surface of a tooth, eg, the lingual tubercle of the maxillary anterior teeth
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angle
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the junction of two or more surfaces
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apex
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the terminal end or tip of a root
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apical
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toward the apex of a root
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axial
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pertaining to the longitudinal (long) axis of the tooth, i.e., labial, buccal, lingual, mesial, and distal surfaces
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axial root center
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an imaginary line passing through the geometric center of a tooth parallel to its long axis
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buccal
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next to or toward the cheek
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buccal surface
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the surface of a posterior tooth positioned immediately adjacent to the cheek
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distal
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away from the median line
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distal surface
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the surface of a tooth facing away from the median line following the curve of the dental arch
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facial surfaces
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refer to labial and buccal surfaces collectively
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labial
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next to or toward the lips
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labial surface
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that surface of an anterior tooth positioned immediately adjacent to the lip
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lingual
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next to or toward the tongue
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lingual surface
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the surface of a tooth that faces towards the tongue
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line angle
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that angle formed by the junction of two surfaces along a line, e.g., the mesiobuccal
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mesial
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toward the median line
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mesial surface
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the surface of a tooth facing toward the median line following the curve of the dental arch
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occlusal
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toward the biting surface of the posterior tooth
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occlusal surface
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the 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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point angle
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that angle formed by the junction of three surfaces at a point, e.g., the mesiolabioincisal angle
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proximal surface
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the surface of a tooth which faces toward an adjoining tooth ni the same arch, i.e., both mesial and distal surfaces are proximal surfaces
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cementoenamel junction
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junction of enamel and cementum, i.e., cervical line
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cervix (neck)
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a narrow or constricted portion of a tooth in the region of the junction of crown and root
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cervical line
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a curved line formed by the junction of enamel and cementum of a tooth, ie, cementoenamel junction
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cingulum
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a bulbous convexity on the cervial third of the lingual surface of an anterior tooth
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contact area
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that region of the mesial or distal surface of a tooth that touches the adjacent tooth in the same arch
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crown
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that portion of a tooth, covered with enamel, which is normally visible in the oral cavity
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cusp
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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 |
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embrasure
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a V-shaped space between the proximal surfaces of two adjoining teeth in contact
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fissure
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a cleft or crevice in a tooth surface thought to result from the imperfect fusion of the enamel of adjoining cusps or lobes
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fossa
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a rounded or angular depression on the surface of a tooth. There are three common types
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lingual fossa
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a broad shallow depression on the lingual surface of an incisor or canine
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central fossa
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a relatively broad deep angular valley in the central portion of the occlusal surface of a molar
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triangular fossa
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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
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groove
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a shallow linear depression on the surface of a tooth. there are two common types
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developmental groove
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marks the boundaries between adjacent cusps and major divisional parts of a tooth
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supplemental groove
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an indistinct linear depression, irregular in extent and direction, which does not demarcate major divisional portions of a tooth
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lobe
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a major division of a tooth erroneously believed to be formed during development from a separate center of calcification
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mamelon
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a rounded or conical prominence on the incisal ridge of a newly erupted incisor
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proximal root concavity
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a depression extending longitudinally on the mesial or distal surface of an anterior or posterior tooth
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pit
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a sharp, pointed depression usually located at the junction of two or more intersecting developmental grooves or at the termination of a single developmental groove
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ridge
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a linear elevation on the surface of a tooth. there are several common types
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marginal ridges
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elevated crests which form the mesial and distal margins of
a) the occlusal surfaces of posterior teeth b) the lingual surfaces of anterior teeth |
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triangular ridges
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prominent elevation triangular in cross-section, which extend from teh tip of a cusp towards the central portion of the occlusal surface of a tooth
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cusp ridges
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elevations which extend in a mesial and distal direction from cusp tips. ____ form the buccal and lingual margins of the occlusal surfaces of posterior teeth
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