Fracture of the proximal femur frequently occur in children with osteogenesis imperfecta(O.I.) or fibrous dysplasia and may lead to progressive coxa vara and a “shepherds crook” deformity. In adults, these changes introduce difficulties that are not ordinarily encountered with routine osteosynthesis. There is minimal literature on this topic and the cases reported are few in number. The purpose of this case report was to describe a intertrochanteric fracture in a elderly woman with O.I. successfully treated by 115 degrees hip osteotomy plate and cannulated screws.Introduction
Objective
Alumina-on-alumina bearings exhibit low wear rates in vitro and one commonly used ceramic implant is the Trident system (Stryker, Mahwah, NJ). There are some reports of incomplete seating of the ceramic liner in the Trident acetabular shell. However, it is often difficult to detect incomplete seating intraoperatively. We sought to prevent incomplete seating using intraoperative radiography. We retrospectively reviewed 19 hips in 17 patients who had undergone primary total hip arthroplasty using a Trident shell with a metal-backed alumina liner between 2007 and 2010. There were 16 women and 1 man, with an average age of 45.7 years. Preoperative diagnosis revealed 14 cases of osteoarthritis and 5 cases of osteonecrosis. All procedures were performed using a posterolateral approach with PSL cups. The minimum follow-up time was 12 months (average 28 months). All procedures included an intraoperative anteroposterior view radiograph to evaluate cup seating. If incomplete seating was recognized we reinserted the liner. Postoperatively, radiographs (supine anteroposterior and cross table lateral views) and computed tomography were performed in all cases in order to assess any residual incomplete seating. We investigated whether it was possible to avoid incomplete seating using intraoperative radiography.Introduction
Materials and Methods
