Radiographic and histopathologic analysis of osteolysis after total shoulder arthroplasty.

Hypothesis: This study analyzed clinical, radiographic, and histologic data from failed total shoulder arthroplasties (TSAs) to determine factors associated with osteolysis.

Materials And Methods: From 1985 to 2005, 52 patients (mean age, 61.6 years) underwent revision TSA at a single institution at a mean of 4.

Comparison of early and delayed failed total shoulder arthroplasty.

The purpose of the present study is to determine what factors contribute to early failure after total shoulder arthroplasty (TSA). Implants were retrieved from 69 patients after failed TSA and were retrospectively assigned to two cohorts based on time of failure: Early, less than 2 years (N = 34); and Delayed, longer than 2 years (N = 35). The clinical information, intraoperative information, most recent radiographs, and damage mapping were collected for all patients.

Observations on retrieved glenoid components from total shoulder arthroplasty.

Hypothesis: Polyethylene components retrieved at revision of total knee and hip replacements have been analyzed to study the effect of design, patient, and surgical factors on initial implant performance, but few studies have reported similar types of findings in retrieved glenoids.

Materials And Methods: From 1979 to 2006, 78 glenoid components were retrieved from revision surgery in 73 patients at a single institution. Each glenoid component was analyzed for 9 modes of damage in each of 4 quadrants into which the bearing surface was divided.

Comparison of conforming and nonconforming retrieved glenoid components.

The purpose of this study was to compare differences in wear performance of conforming and nonconforming glenoid designs, using clinical, radiographic, and retrieved polyethylene glenoid component outcome Sixty-three glenoids met the study criteria, and each glenoid was assigned to the conforming group (if the radii of curvature of the humeral and glenoid components were identical) or the nonconforming group (if a mismatch existed between the radii of curvature). The mean length of implantation was 5.6 +/- 5.