endosteal implant [Gk, endon, within + osteon, bone] , a dental implant made of metal, ceramic, or polymeric material, consisting of a blade, screw, pin, or vent, inserted into the jawbone through the alveolar or basal bone, with a post protruding through the mucoperiosteum into the oral cavity to serve as an abutment for dentures, single tooth replacement, or orthodontic appliances.