Introduction. Osteonecrosis of the femoral head occurs in young patients. The preservation of the hip joint is vitally important, because hip arthroplasty does not guarantee satisfactory long-term results in young and active patients. Curved intertrochanteric varus osteotomy is one of several joint preserving procedures used for this disease. Methods. Between June 2004 and June 2007, 52 patients (55 hips) who had osteonecrosis of the femoral head were treated with curved intertrochanteric varus osteotomy. There were 29 men and 23 women who had a mean age at the time of osteotomy of 33 years (range, 18 to 52 years). The osteotomy was fixed with a 120 degree compression hip screw in the first 34 hips and with a 95 degree dynamic condylar screw in the remaining 21 hips. Clinical evaluation was performed using the scoring system of Merle d'Aubigne et al. Results. The mean duration of follow-up was 32 months (range, 24 to 60 months). Six patients (six hips) required a total hip arthroplasty, due to loss of fixation in two hips, shortening of the operated limb in two hips, and further collapse with persistent pain in two hips. In two patients (two hips), the plate fractured at 3 and 4 months after the operation, which was changed to a new plate. Thus, 49 of the 55 hips survived at a mean follow-up 32 months. In these hips, the mean Merle d'Aubigne hip score was 17.4 points at the latest evaluation. Conclusion. Curved intertrochanteric varus osteotomy is a satisfactory joint preserving method to treat osteonecrosis of the femoral head

Introduction. Curved varus intertrochanteric osteotomy of the femur is an excellent and minimally invasive method for the treatment of osteonecrosis of the femoral head or osteoarthritis of the hip for joint preservation. However, the early postoperative complications of this procedure may be due to separation at the osteotomy site and an increase in varus angle due to early partial weight bearing. Methods. We modified the curved varus intertrochanteric osteotomy of the femur by performing an additional rotation. Regarding the surgical technique, curved varus osteotomy is performed at an angle of 30 degrees to the femoral shaft and an additional rotational osteotomy is also performed at an angle of 15 or 20 degrees to the osteotomy plane. Partial weight bearing with one-third body weight is permitted 3 weeks after surgery. Results. Curved varus intertrochanteric osteotomy of the femur was designed for developmental dysplastic hip by Nishio in 1969 and reported to have good outcomes in 1971. An important feature of this method is that the incidence of high riding of the greater trochanter or shortening of leg length is less than that in varus intertrochanteric osteotomy. Moreover, good contact at the osteotomy site and less lateral shift of the femoral shaft is observed. However, we have experienced a case of separation at the osteotomy site and increase of the varus angle in our hospital. Previous reports recommended that partial weight bearing with one-third body weight should be initiated after 5 weeks and full weight bearing after 6 months because the contact area is decreased at the osteotomy site by varus osteotomy. The post-operative recovery of the patients with total hip arthroplasty is rapid, therefore, we must consider important issues such as initiating the rehabilitation program early and reducing the duration of hospitalization. As per our experience, we think that partial weight bearing with one-third body weight should be initiated at 3 weeks. At the osteotomy site, we rotated the nearest bone segment to move it such that it intersects the proximal and distal bone cortex. Therefore, the osteotomy site will be stabilized and will have the ability to endure load. Another feature of this technique is that the partial removal of the necrotic area leads to an increase in the healthy load-bearing area. A limitation of this method is that an angle of an additional rotation is up to 30 degrees, because the joint capsule cannot be incised circumferentially and the short external rotator tendons should also be preserved. Conclusion. Modified curved varus intertrochanteric osteotomy is a useful method for the prevention of increased degree of a varus angle as well as for obtaining more intact area of femoral head in osteonecrosis

Introduction

Transtrochanteric curved varus osteotomy is one of the effective joint-preserving operations for osteonecrosis (ON) of the femoral head. We correlated various factors with the radiological outcome of this procedure.

Introduction

A transtrochanteric curved varus osteotomy (TCVO) is an excellent joint preserving surgical modality if the necrotic lesion can be moved to the non-weight bearing area as assessed by maximum abduction antero-posterior radiographs. The purpose of this article was to elucidate whether TCVO can reduce the volume of osteonecrosis after an index osteotomy as assessed by magnetic resonance imaging (MRI).

The aim of this study was to establish a classification system for the acromioclavicular joint using cadaveric dissection and radiological analyses of both reformatted computed tomographic scans and conventional radiographs centred on the joint. This classification should be useful for planning arthroscopic procedures or introducing a needle and in prospective studies of biomechanical stresses across the joint which may be associated with the development of joint pathology.

We have demonstrated three main three-dimensional morphological groups namely flat, oblique and curved, on both cadaveric examination and radiological assessment. These groups were recognised in both the coronal and axial planes and were independent of age.