Thomas C Barber

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Dislocation rates after total hip arthroplasty in a community setting have not been well documented. We used a community based joint registry to evaluate hip dislocations that occurred within 1 year after total hip arthroplasty. We evaluated patient, implant, and technical factors associated with dislocation, including primary versus revision surgery,(More)
Despite benefits of digital templating, digital image acquisition techniques often make image magnification unknown and variable. We assessed the accuracy of digital x-ray scaling devices based on position. Radiographs of 106 total hip arthroplasty (THA) patients were studied to determine the accuracy of 2 digital x-ray markers at 1 of 4 positions by(More)
A consecutive series of 49 patients who had a primary total hip arthroplasty (THA) for osteoarthritis is reviewed to determine the difference in clinical outcome between the direct lateral and the posterior surgical approaches to the hip. Group 1 comprised 28 patients off had THA by the same surgeon using a posterolateral approach. Group 2 comprised 21(More)
Background and purpose - The effect of total joint arthroplasty (TJA) on physical activity is not fully understood. We investigated the change in physical activity after TJA and patient factors associated with change. Patients and methods - Using a total joint replacement registry, primary total hip arthroplasty (THA) patients (n = 5,678) and knee(More)
Recent studies of the epidermis in patients with recessive X-linked ichthyosis indicate that cholesterol sulfate is an important endogenous substrate for steroid sulfatase in the stratum corneum. We report here that cholesterol sulfotransferase, which converts cholesterol to cholesterol sulfate, is present in the lower living epidermis. Epidermal cytosol(More)
BACKGROUND In response to the increased volume, risk, and cost of medical devices, in 2001 Kaiser Permanente (KP) developed implant registries to enhance patient safety and quality, and to evaluate cost-effectiveness. METHODS Using an integrated electronic health record system, administrative databases, and other institutional databases, orthopedic,(More)
BACKGROUND HXLPE (highly cross-linked polyethylene) has greater wear resistance compared with UHMWPE (ultra-high molecular weight polyethylene), which may contribute to improving the outcomes of total hip arthroplasty with a large femoral head. However, no information is available regarding the effect of femoral head size on the survivorship of HXLPE hip(More)
The change in the hospital cost of total hip arthroplasty over a ten-year period at the Lahey Clinic was evaluated by comparison of the hospital bills for forty-four hip replacements that had been performed in 1981 with the bills for 104 such operations that had been done in 1990. Each hospital charge was converted to cost with use of government-mandated(More)
This study compared the total joint arthroplasty (TJA) surgical outcomes of patients who had bariatric surgery prior to TJA to TJA patients who were candidates but did not have bariatric surgery. Patients were retrospectively grouped into: Group 1 (n = 69), those with bariatric surgery >2 years prior to TJA, Group 2 (n = 102), those with surgery within 2(More)