Dislocation after the first and multiple revision total hip arthroplasty: comparison between acetabulum-only, femur-only and both component revision hip arthroplasty.

Background: Dislocation may complicate revision total hip arthroplasty (THA). We examined the correlation between the components revised during hip arthroplasty (femur only, acetabulum only and both components) to the rates of dislocation in the first and multiple revision THA.

Methods: We obtained data from consecutive revision THAs performed between January 1982 and December 2005.

The effect of the cam deformity on the insertion of the femoral component in hip resurfacing.

Surface arthroplasty simulations were generated using 3-dimensional computed tomographic scans from 61 consecutive patients presenting with idiopathic osteoarthritis to evaluate the change in femoral component positioning that would allow optimal alignment when resurfacing a cam-type deformity. Anatomical parameters were measured to quantify the influence of the deformity on the insertion technique of the femoral implant. A modified femoral head ratio was initially calculated from plain radiographs to define the severity of cam deformity in these patients.

Computer-assisted FluoroGuide navigation of unicompartmental knee arthroplasty.

Background: Most authorities recognize minimally invasive unicompartmental knee arthroplasty (UKA) as technically demanding with concerns regarding loss of implantation accuracy. We have previously reported on the potential inaccuracy of femoral intramedullary guides in UKA leading to poor component positioning. Our 3-dimensional analysis of alignment error showed that a short, narrow intramedullary rod inserted according to the manufacturer's specifications did not accurately find the direction of the anatomic axis, with errors occurring in both the coronal and sagittal planes.

A rehabilitation program for patients recovering from severe stroke.

Objective: The purpose of this study was to describe the outcomes of patients with a severe stroke admitted to a specialized "slow stream" rehabilitation program and to develop a model to predict discharge destination.

Methods: Chart review of 196 consecutive non-ambulatory ("lower-band") stroke patients admitted between 1996-2001, to a specialized in-patient rehabilitation unit designed to accommodate the needs of patients with profound disabilities, and who were considered inappropriate for conventional inpatient rehabilitation programs. Special features of this program included the availability of an independent living unit, therapies tailored to individual tolerance and the opportunity to remain on the unit for an extended period until such time that the patients' rehabilitation potential had been maximized.