| 摘要 |
PROBLEM TO BE SOLVED: To hold the form of the lower face while preventing the displacement of the mandible at the time of a static nonfunction and to compensate gliding motion by rotation motion at the time of a dynamic function by roughly bisecting an artificial jaw joint to the bone head and socket and segmenting both to function parts and bone joint parts to constitute an artificial jaw joint. SOLUTION: The artificial joint is roughly bisected to the socket and the bone head. The socket is segmented to a soft material socket part Fs and a socket-side bone head joint part Ts and the bone head to a bone head- mandible joint part Cm and a hard bone head part Cc, respectively. The socket and the bone head respectively have lock screws Ss for bone joining. Since the artificial joint exists forward and downward of the position of the intrinsic jaw joint, the bone contact area sufficient for fixing and the quality of the osteobeam are easily obtd. at the boundaries among the socket-side bone head joint part Ts and the bone head-mandible joint part Cm which are the joint surfaces with the bone and the existing bone. There is a distance to the dangerous braincase and there is no need for worrying about the sinking to the base of the skull. |
