incisor (redirected from Incisors)

incisor /in·ci·sor/ (I) (-si´zer)

1. adapted for cutting.

2. incisor tooth.

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in·ci·sor (n-szr)

n.

Any of the four teeth adapted for cutting or gnawing, having a chisel-shaped crown and a single conical root and located in the front part of both jaws in both deciduous and permanent dentitions.

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incisor

[insī′zər]

one of the four anterior teeth in each dental arch. Primary incisors appear during infancy and are replaced during childhood by secondary incisors. The crown of each incisor is chisel shaped and has a sharp cutting edge. Its labial surface is convex, smooth, and highly polished; its lingual surface is concave and, in many individuals, is marked by an inverted V-shaped basal ridge near the gingiva of the maxillary arch. The neck of an incisor is constricted, and the root is single, long, and conic. The upper incisors are larger and stronger than the lower and are directed downward and forward. Compare canine tooth, molar, premolar.

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incisor(s) (insī´zur),

n a cutting tooth, one of the four anterior teeth of either jaw.

incisor, central,

n the first incisor.

incisor, Hutchinson's,

n the malformed teeth caused by the presence of congenital syphilis during tooth development. The incisors usually are shorter than normal, show a single permanent notch on each incisal edge, and are screwdriver shaped.

incisor, lateral,

n the second incisor.

incisor point,

n See point, incisor.

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incisor

1. adapted for cutting.

2. any one of the six (eight in ruminants but only in the lower jaw) front teeth of either jaw. See also teeth.