An implantable knee prosthesis for unicompartmental implantation into a knee joint includes a body having a substantially elliptical shape in plan and a pair of opposed faces. A peripheral face extends between the opposed faces and has first and second opposed sides and first and second opposed ends....http://www.google.com.tw/patents/US6923831?utm_source=gb-gplus-share專利 US6923831 - Surgically implantable knee prosthesis having attachment apertures
