OBJECTIVE To evaluate the prevalence of exclusive lower extremity metastases, specifically in the femur and below the knee, observed at (18)F-NaF PET/CT. MATERIALS AND METHODS One thousand consecutive PET/CT studies were retrospectively evaluated for the presence of exclusive uptake in lower extremities suggesting metastatic involvement. The presumptive diagnoses based on such uptakes were su...

The association of transcervical fractures of the femur with avascular necrosis of the capital fragment was recognised many years ago. Nevertheless several basic questions, such as the incidence ofavascular necrosis, the extent and pattern ofbone death and revascularisation and also the role played by avascular necrosis in non-union of these fractures, remain unanswered. In the hope that a hist...

Objective: In order to avoid the adverse consequences which cause by anthropogenic factor in the femoral neck fracture surgery and meet the requirements of selecting the most reasonable internal fixation way, from the viewpoint of biomechanics, an optimal selection system of internal fixation methods for femoral neck facture are established which integrates preprocessing, solving and post-proce...

PURPOSE To evaluate the effect of prosthesis design on stress profile in the proximal femur after hip resurfacing. METHODS The von Mises stress profile of the native femur was simulated and compared with that of resurfaced femurs using various prosthetic materials (titanium, cobalt-chrome, ceramic), stem lengths (normal, half, short, and no stem), and femoral head coverage (shell size) [260 d...

We studied the prognostic value of MRI in 32 radiographically normal, asymptomatic hips in 25 patients at risk of osteonecrosis from glucocorticoids or alcoholism. The early findings were band-like hypointense zones on spin-echo images. No operations were performed. Life-table survival curves showed that femoral heads in which the hypointense zone traversed the middle portion of the head were m...

Aim. To develop an animal model of femoral head aseptic necrosis for studying Legg–Calvé–Perthes disease. Materials and Methods. induce the development necrosis, we used Wistar rats (n = 8) which suffered from combined hypoperfusion increased intra-articular pressure in hip joint. Having employed isoflurane anesthesia, performed incision (≈ 3 cm length) on outer surface thigh projection joint t...

INTRODUCTION: Avascular necrosis of the femoral head (FHN) is a common complication with disabling effect for young patients after high dose corticosteroid treatment [1]. Recently, we could show that steroids have a vasoconstrictive effect on lateral epiphyseal arteries of the femoral head (FH) which could lead to FH ischemia and subsequent necrosis [2]. In the current study we investigated the...

Precise knowledge of the vascular supply of the femoral head is critical when contemplating surgery around the femoral head and neck junction. To determine the blood supply to the femoral neck, 2417 nutrient foramina from 76 cadaveric specimens were analyzed based on size, number, and distribution. Within the subcapital, transcervical, and basicervical regions of the femoral neck, the largest n...