Calcar resorption beneath a well-fitting flanged femoral prosthesis.
Forty-three of 51 Link SP hip prostheses inserted 4 years previous to this study were clinically and radiographically reviewed. All demonstrated bone resorption in excess of 2 mm under the collar, but this resorption was not progressive. No prosthesis had loosened. The collar of a prosthesis, even when securely cemented into the femur with a carefully matched neck cut, was decoupled from its functional position in all the reviewed cases at 4 years. Its only remaining function was to prevent subsidence within the cement mantle, should it ever become necessary to provide stability.
O'Hara
J N
JN
Royal Orthopaedic Hospital, Northfield, Birmingham, United Kingdom.
McMinn
D J
DJ
D001843:Bone Cements; D001862:Bone Resorption / Q000209:etiology*; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D013314:Stress, Mechanical
D001843:Bone Cements