Osteonecrosis (ON) is one of the most debilitating skeletal disorders. Most patients with ON of the femoral head eventually require surgery, usually total hip arthroplasty, within a few years of disease onset. Previous reports have shown that alendronate reduces osteoclastic activity and reduces the incidence of femoral head collapse in osteonecrotic hips. A randomized study to examine the ability of alendronate to delay or prevent femoral head collapse was performed. From June 2005 to December 2006, sixty four patients were enrolled and randomly assigned to alendronate or placebo. Five patients were excluded from the analysis because of their failure to adhere to the study protocol. Disease progression was evaluated using radiographs and magnetic resonance imaging (MRI).Introduction
Methods
The goals of knee arthroplasty are to relieve pain, to provide motion while maintaining stability, and to correct deformity. According to advantages of minimally invasive surgical procedure (MIS) are to facilitate the patient’s recovery, less pain, earlier mobilization, shorter hospital stay, and quicker rehabilitation. The surgeon takes responsibility between each other and makes the decision, makes the cuts, checks accuracy of surgery even he/she uses jigs or not. From April 2005 to February 2008, more than 50 unicompartmental knee arthroplasty (UKA) were performed at our medical center with free hand technique. We conclude this free hand technique of MIS UKA, the small incision, short operative time, less blood loss, quick recovery, accurate alignment, and reduced fat or thrombo-embolism risk were impressed, also the extra advantage is preservation of patellar-femoral joint.
