title: Computerized templating in uncemented total hip arthroplasty to assess component fit and fill.
abstract: The aim of the uncemented femoral component in total hip arthroplasty is to achieve a stable bone-prosthesis interface without the use of polymethyl methacrylate (PMMA). Maximal fill of the femoral canal by the prosthesis promotes initial stability and long-term optimal stress transfer to the bone. The percentage "fit and fill" of the proximal femur by three prostheses, the porous coated anatomic, anatomic medullary locking, and the Harris-Galante, was compared by use of a computerized templating model to assess preoperative radiographs of 20 patients. Results showed that overall percentage fit and fill was similar and satisfactory (greater than 60%) in 17 of 20 patients. If a satisfactory fill was not achieved with one prosthesis, another prosthesis did not significantly improve fill. Lack of bony contact in the proximomedial femur was the most common deficiency noted.
authors.affiliation: Southampton General Hospital, Shirley, England.
authors.forename: H J
authors.initials: HJ
authors.lastname: Clarke
authors.forename: R H
authors.initials: RH
authors.lastname: Jinnah
authors.forename: Q G
authors.initials: QG
authors.lastname: Cox
authors.forename: M J
authors.initials: MJ
authors.lastname: Curtis
mesh_terms: D017076:Computer-Aided Design; D005270:Femur Head / Q000000981:diagnostic imaging; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D011474:Prosthesis Design; D011859:Radiography