A flexible enclosure is applied to a prosthetic joint to isolate wear particles which are produced by interengagement between the components of the joint. The enclosure overlies the joint, and is affixed to the respective joint components proximate to its ends. The enclosure may be impermeable to fluids...http://www.google.com.au/patents/US4731088?utm_source=gb-gplus-sharePatent US4731088 - Enclosure member for prosthetic joint
