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Dental Anatomy Terminology
Starters
37
Biology
Professional
08/24/2012

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Term
maxillary
Definition
upper arch of the mouth
Term
mandibular
Definition
lower arch of the mouth
Term
mesial
Definition

toward the center line of the dental arch

external tooth surface

Term
distal
Definition

away from the center line of the dental arch

external tooth surface

Term
proximal
Definition

the mesial or distal surface of a tooth or the portion of a cavity that is nearest to the adjacent tooth

external tooth surface

Term
buccal
Definition

adjacent to the cheek

(premolars and molars)

external tooth surface

Term
labial
Definition

toward the lip

(incisors and canines)

external tooth surface

Term
facial
Definition

incudes buccal and labial surfaces of teeth in both maxillary and mandibular arches

external tooth surface

Term
occlusal
Definition

pertaining to the masticating surfaces of the posterior teeth

external tooth surface

Term
lingual
Definition
next to or toward the tongue
Term
incisal
Definition

relating to the cutting edge of the anterior teeth, the incisors and canines

external tooth surface

Term
Pulpal
Definition

internal wall perpendicular to the long axis of the tooth

interior tooth surface

Term
axial
Definition

internal wall parallel to the long axis of the tooth

internal tooth surface

Term
Cusp
Definition

elevation or mound on the crown portion of the tooth making up a divisional part of the occlusal surface

Crown Elevations

Term
Cingulum
Definition

large rounded eminence on the lingual surface of all anterior teeth, which encompasses the cervical third of the lingual surface

Crown Elevations

Term
Tubercle
Definition

an elevation smaller than a cusp on some portion of the crown produced by an extra formation of enamel.

(These are deviations from the typical form expect for the Cusp of Carabelli on the maxillary first molar).

Crown Elevations

Term
Mamelon
Definition

rounded projections on incisal edges of incisors which normally wear away shortly after eruption

Crown Elevations

Term
Ridge
Definition

any linear elevation on the surface of the tooth and is named accordingly to its location

Crown Elevations

Term
Marginal Ridges
Definition

rounded boarders of the enamel that form the mesial and distal margins of the occlusal surfaces of premolars and molars and the mesial and distal margins of the lingual surfaces of the incisors and canines.

Crown Elevations

Term
triangular ridges
Definition

linear ridges which descend from the tips of cusps of posterior teeth toward the central area of the occlusal surface forming a triangular shape

Crown Elevations

Term
transverse ridge
Definition

the union of a buccal and lingual triangular ridge crossing transversely the surface of a posterior tooth

Crown Elevations

Term
oblique ridge
Definition

a ridge crossing obliquely the occlusal surfaces of maxillary molars and formed by the union of the triangular ridge of the distobuccal cusp and the distal cusp ridge of the mesiolingual cusp

Crown Elevations

Term
cusp ridge
Definition

the ridges extending from a cusp tip; each cusp has four cusp ridges extending in different directions (mesial, dstal, facial, and lingual)

Crown Elevations

Term
Fossa
Definition

an irregular depression or concavity

Crown Depressions

Term
lingual fossae
Definition

located on the lingual surface of incisors

Crown Depressions

Term
central fossae
Definition

located on the occlusal surface of molars, formed by the convergin of ridges terminating at a central point in the bottom of the depression where there is a junction of grooves

Crown Depressions

Term
triangular fossae
Definition

located on molars and premolars on the occlusal surfaces adjacent to arginal ridges

(they are sometimes found on the lingual surfaces of maxiallary incisors at the edge of the lingual fossae where the marginal ridges and the cingulum meet).

Crown Depressions

Term
Development (primary) groove
Definition

Shallow groove or line between the primary parts, or lobes of the crown of a tooth.

Crown Depressions

Term
supplemental (secondary) groove)
Definition

an auxillary groove which branches from a development groove, and is not related to the junctions of primary parts of the crown.

Crown Depressions

Term
pits
Definition

small pinpoint depressions located at the junction of developmental grooves or at terminals of the grooves

Crown Depressions

Term
line angle
Definition

where two walls (surfaces) meet

mesiobuccal line angle

Term
point angle
Definition

where three walls meet

(When combining words to form the name of a ling angle or point angle, the last two letter of all but the last word are dropped and the letter "o" is subsititued.  Two o's are sepearated by a hyphen.)

mesio-occluso-buccal point angle

Crown Depressions

Term
contact area
Definition

the area of the proximal surface (mesial or distal) of a tooth that touches an adjacent tooth in that arch

Crown Depressions

Term
embrasure
Definition
the open spaces between the proximal surfaces of adjacent teeth
Term
lobe
Definition

one of four or five, primary centers of formation of a tooth;s cron.  Cusps are repsresentative of lobes.  Mamelons represent the incisal termination of a lobe.

Crown Depressions

Term
Concave or concavity
Definition
a surface that curves inward
Term
convex or convexity
Definition
a surface that curves or bulges outward
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