We have previously reported on the
Introduction. Osseointegration has been established as a promising approach for the reconstruction of amputated limbs, particularly for amputees suffering from traditional socket prosthesis (TSP). While Osseointegration was originally developed with a screw fixation design, several Osseointegration devices adopting a modern press-fit design have also been introduced. In this study,
Introduction. Micro-arc oxidation (MAO) is an electrochemical method used to treat metal surfaces. It provides nanoporous pits, and thick oxide layers, and incorporates calcium and phosphorus into the coating layer of titanium alloy. This modification on the surface of titanium alloy by MAO coating would improve the ability of cementless stems to osseointegrate. In spite of these structural and chemical advantages, clinical study of total hip arthroplasty (THA) using MAO coated stem has not yet been reported. In this study, we evaluated the clinical and radiographic results associated with cementless grit-blasted tapered-wedge stems that were identical in geometry but differed with regard to surface treatment with or without MAO coating. Materials & Methods. We performed a retrospective review of 141 THAs using MAO coated stem for a minimum of 5 years and compared them to 219 THAs using the same geometry stem without MAO coating. A cementless Bencox femoral component (Corentec, Seoul, Korea) was used in all hips. It is made of titanium alloy with a straight, double wedged, tapered stem with a rectangular cross-section. Surface treatment was performed using grit blasting with a roughness of 5.5ųm that was available either with or without MAO coating. Clinical and radiographic evaluations were performed preoperatively and at 6 weeks, 3 months, 6 months, and 1 year postoperatively, and then annually. Results. In the MAO coating group, the mean Harris hip score improved from 43.7 points preoperatively to 93.9 points postoperatively. The mean WOMAC score and UCLA activity score at the final follow-up was 17 points (range, 6–34 points) and 6.9 points (range, 5–10 points), respectively. Thigh pain at final follow-up was reported in 2 hips (1.4%), but neither of these hips showed signs of implant loosening or limited daily activities. Complications included one squeaking, one iliopsoas tendonitis, and one deep vein thrombosis. Postoperative Harris hip scores, WOMAC scores, UCLA activity scores, and complication rates did not differ between the two groups. In both groups, no femoral or acetabular component showed radiographic evidence of mechanical loosening, and no components had been revised at the final follow-up. Conclusions. Primary THA using a cementless grit-blasted tapered-wedge stem with MAO coating showed encouraging
Developments in plate technology have increased interest in the operative fixation of Colles' fracture. The vast majority of patients are treated non-operatively, yet there are few medium or long-term outcome studies. The aim of this study was to evaluate