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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