inferior border of mandible

in·fe·ri·or bor·der of man·di·ble

(in-fēr'ē-ŏr bōr'dĕr man'di-bĕl) Linear undersurface of the lower jaw bone, made up of cortical bone. Viewed on a panoramic dental radiograph, it appears as a radiopaque band outlining the lower edge of the lower jaw.
Synonym(s): mandibular border.