Minimum 5-year results of modular metal-on-metal total hip arthroplasty.

This study reports minimum 5-year results of 95 hips implanted with a Pinnacle (DePuy, Warsaw, Ind) modular metal-on-metal acetabular prosthesis. Clinical scores such as the Harris Hip and Western Ontario and McMaster Universities Arthritis Index revealed excellent clinical outcomes at mean 6-year follow-up. With the use of large-diameter femoral heads, dislocation was rare, occurring in only 1 hip.

The incidence of femoral component version change in primary THA using the S-ROM femoral component.

Although use of modular femoral components in revision total hip arthroplasty (THA) is widely accepted, many still question the need for modular versatility in primary THA. This study examined a large cohort of primary THA patients implanted with a modular S-ROM femoral component (DePuy Orthopaedics, Warsaw, Indiana) to determine the percentage of hips in which the surgeon changed version of the femoral component to increase the intraoperative stability of the THA construct and/or to maximize hip range of motion without impingement.In a group of 1000 routine, primary THAs, femoral component version was changed in 479 hips (47.

Influence of stem size on clinical outcome of primary total hip arthroplasty with cementless extensively porous-coated femoral components.

This study retrospectively evaluated the clinical outcome of primary total hip arthroplasty as a function of stem diameter in 1545 patients implanted with extensively porous-coated stems. Less than 2% of femoral components were loose or revised; femoral survivorship was 97.9% at 15 years.

A randomized prospective evaluation of outcomes after total hip arthroplasty using cross-linked marathon and non-cross-linked Enduron polyethylene liners.

Cross-linked liners were introduced with the promise that they would substantially reduce polyethylene wear. In 1999, our institution initiated a prospective study to compare the outcome of total hip arthroplasty patients who were randomized to non-cross-linked Enduron liners with that of total hip arthroplasty patients who were randomized to Marathon polyethylene liners that had been cross-linked with 5 Mrad (50 kGy) of gamma-irradiation and heat-treated to eliminate free radicals. At a mean follow-up of 5.

The temporal progression of pelvic osteolysis after uncemented total hip arthroplasty.

This study examined the natural progression of pelvic osteolysis post uncemented total hip arthroplasty. Serial radiographs from 145 total hip arthroplasties with minimum 10-year follow-up were examined. Thirty-two lesions were identified in 25 hips and their 2-dimensional radiographic size over time was measured via computer.