Title:
【発明の名称】大腿骨ヘッド-ネック義肢、およびその移植方法
Document Type and Number:
Japanese Patent JP2001505077
Kind Code:
A
Abstract:
A femoral head-neck prosthesis (1) which allows natural straining of the upper femur to prevent bone loss. The natural angle of loading of the bone is determined prior to the operation, and the prosthesis is implanted with its longitudinal axis (AX-1) parallel to the natural angle (AX-5). The prosthesis is constructed to inhibit axial fixation and "splinting" of the prosthesis below the interface between the femur neck and the prosthesis on the upper femur. Splines (19) on a stem (13) of the prosthesis help to fix the prosthesis against rotation and toggling motion. The prosthesis is asymmetrical about its longitudinal axis to provide further stability when implanted. The prosthesis and its method of implantation preserve the trochanter and cap the femur to prevent microscopic debris from entering the interior bone.
Inventors:
Grimes, james bee
Application Number:
JP50998798A
Publication Date:
April 17, 2001
Filing Date:
August 13, 1997
Export Citation:
Assignee:
Grimes, james bee
International Classes:
A61F2/32; A61B17/15; A61B17/16; A61B17/17; A61F2/36; A61F2/46; A61B10/00; A61B10/02; A61B17/32; A61B17/34; A61B17/74; A61B17/88; A61B19/00; A61F2/00; A61F2/30; (IPC1-7): A61F2/32
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)