The anatomic portion of the tooth that is covered by cementum and is located in the alveolus (socket) where it is attached by the periodontal apparatus; radicular portion of tooth.
Interlocking device, having a male component integrated into a removable prosthesis that fits precisely into a female component embedded in the body of abutment teeth or implant abutments, to stabilize or retain the prosthesis when it is seated in the mouth.