Biomedical subjects
Publications and source records attributed to Jill Jasperson Branson.
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We studied the P.F.C. Sigma rotating-platform total knee arthroplasties performed during 2004 and 2005 to assess implant size variations in men versus women and size variation in bilateral knees. We subsequently studied commercial femoral radiograph templates to compare mediolateral and anteroposterior dimensions. Sixty-four percent of women more frequently had a tibial tray one size smaller with respect to the femur and 63.5% of men had the same-sized femur and tibia. Bilateral knees were the same size in both sides 97% of the time in women, and 90% in men. The template comparison found that the P.F.C. Sigma rotating-platform femur had a mediolateral dimension that was smaller than many knee replacements commercially available.
We describe experience with 2000 cruciate-retaining Sigma RP total knee arthroplasties performed between September 2000 to January 2006. All procedures were performed with a midvastus arthrotomy, medioposterior release, and posterior condylar clean-out technique. This implant design uses a congruent polyethylene bearing to diminish contact stress while allowing rotation between the polyethylene bearing surface and tibial tray. Of the 2000 knees, 1596 had follow-up data at one year. Seven hundred-twenty-seven had an average flexion of 123 degrees, 692 had an average Knee Society Score of 94, and 672 had an average function score of 86.
TOTAL HIP ARTHROPLASTY (THA) has been proven to decrease a patient's pain and improve function and quality of life. This procedure has been performed in the United States since 1960. Follow-up data suggest long-term success with a decreasing rate of complications and low rate of revision. MORE THAN 168,000 THA procedures are performed in the United States every year. There is an 80% chance these hip replacements will last at least 20 years. CURRENT IMPROVEMENTS in hip designs, surgical techniques, fixation methods, prophylactic therapies, preadmission education, and rehabilitation have contributed to improved patient outcomes.