The Journal of bone and joint surgery. American volume
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J Bone Joint Surg Am · Jun 2000
Anatomical considerations regarding the posterior interosseous nerve during posterolateral approaches to the proximal part of the radius.
The purpose of our study was to quantify the dimensions of a surgically safe zone along the proximal part of the radius, from the posterolateral aspect. ⋯ Approaching the lateral aspect of the proximal part of the radius is safest in pronation.
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J Bone Joint Surg Am · Jun 2000
Total hip arthroplasty with use of the Metasul metal-on-metal articulation. Four to seven-year results.
Total hip replacements with a metal-on-metal articulation were commonly used until the mid-1970s; most were then abandoned in favor of hip replacement with a metal-on-polyethylene articulation. The reason for this change was primarily early cup loosening, which was more prevalent with these metal-on-metal designs than it was with metal-on-polyethylene designs. In the late 1980s, a metal-on-metal design with improved clearance (adequate space between the femoral head and the acetabular articulation surface to allow fluid film lubrication and clearance of any debris from within this joint), metal hardness, and reproducible surfaces was introduced by Sulzer Orthopedics in Switzerland. Orthopaedic surgeons were interested in this Metasul articulation because the contribution of polyethylene wear particles to the failure of total hip replacements had become evident. This study was undertaken to review the clinical performance of this implant and to determine if early acetabular loosening or revision and wear and osteolysis were prevalent. ⋯ Our four to seven-year experience with this articulation surface indicates that the clinical results are similar to those of total hip replacements with a metal-on-polyethylene articulation. We believe that the Metasul articulation may have a role in reducing the wear that occurs with total hip replacement. The Metasul articulation appears to be particularly indicated for more active patients. A historical comparison with the reports in the literature of which we are aware indicated that the hips in our study had a lower rate of acetabular revision and loosening than did those with previous metal-on-metal designs and that they had no more acetabular loosening or osteolysis than did those with metal-on-polyethylene articulations followed for an average of five years.
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J Bone Joint Surg Am · Jun 2000
Conversion of external fixation to intramedullary nailing for fractures of the shaft of the femur in multiply injured patients.
From 1989 to 1997, 1507 fractures of the shaft of the femur were treated with intramedullary nailing at The R Adams Cowley Shock Trauma Center. Fifty-nine (4 percent) of those fractures were treated with early external fixation followed by planned conversion to intramedullary nail fixation. This two-stage stabilization protocol was selected for patients who were critically ill and poor candidates for an immediate intramedullary procedure or who required expedient femoral fixation followed by repair of an ipsilateral vascular injury. The purpose of the current investigation was to determine whether this protocol is an appropriate alternative for the management of fractures of the femur in patients who are poor candidates for immediate intramedullary nailing. ⋯ We concluded that immediate external fixation followed by early closed intramedullary nailing is a safe treatment method for fractures of the shaft of the femur in selected multiply injured patients.