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extension of the incisal or buccal cusp ridges of the upper teeth horizontally (labially or buccally) beyond the ridges of the teeth in the lower jaw when the jaws are closed normally.
the projection of the upper anterior and/or posterior teeth beyond their antagonists in a horizontal direction.
overjet/over·jet/ (o´ver-jet) extension of the incisal or buccal cusp ridges of the upper teeth labially or buccally to the incisal margins and ridges of the lower teeth when the jaws are closed normally.
Etymology: AS, ofer + Fr, jeter, to throw
hor·i·zon·tal o·ver·lap(hōr'i-zon'tăl ō'vĕr-lap)
n the horizontal projection of maxillary teeth beyond the mandibular teeth, usually measured parallel to the occlusal plane. When not otherwise specified, the term is generally assumed to refer to central incisors and is measured from the labial surface of the lower central incisors to the labial surface of the upper central incisors at the level of the upper incisor edge. Unique conditions may sometimes require other measuring techniques. See also overlap, horizontal.