INTRODUCTION Bone is the third most common site of metastatic disease. Treatment of metastatic tumours of proximal femur usually used to be either palliative in the form of radiotherapy and chemotherapy or a very radical in form of hemipelvectomy and hip disarticulation. Both forms of treatment were associated with dismal outcomes. Now with the technological advancement and refinement in surger...

With the exhibit of pseudotumor discoveries around hip replacements, the search for the cause of such abnormal masses has become a topic of great interest. Possible areas of causation include metal-on-metal hip replacements compared to metal-on-polyethylene hip replacements, patient hypersensitivity to prosthesis debris, or even prosthesis surgical position has been investigated. Although more ...

The hip joint is often affected by diseases that lead to its failure and consequent need of replacement by an artificial joint. In this case, the total hip arthroplasty is the most common medical procedure to substitute the natural joint. The total hip prostheses are available on a wide range of sizes and materials. In this work, it is develop a computational model to compute the contact pressu...

Based on the thermo elasticity, using finite element method to analyze the stress of femur-prosthesis system when the hip joint has been replaced, a reference for the selection of prosthesis material is presented after discussing the thermo physical property of material which has an effect on the stress of femur-prosthesis system. We assume that prosthesis, bone cement and femur are linear elas...

conclusion of the asymptomatic patients investigated, 58% showed focal enhanced periprosthetic glucose metabolism. this finding should be taken into consideration as a more probable unspecific metabolic pattern for correct interpretation of 18f-fdg-pet studies in patients with suspected septic loosening of the hip prosthesis. results fourteen hip prostheses in 12 patients were visually analyzed...

Few measurements have been made of the frictional forces within living joints. Barnett and Cobbold (1962) recorded that the coefficient of friction at the distal interphalangeal joint of the middle finger in six healthy adults could be as low as 0 0075, a figure of the same order as that in excised joints (Jones, 1936; Charnley, 1959). Rydell (1965) measured, in a patient fitted with a hip pros...

BACKGROUND Patients undergoing proximal femoral replacement for tumor resection often have compromised hip abductor muscles resulting in a Trendelenberg limp and hip instability. Commercially available proximal femoral prostheses offer several designs with varying sites of attachment for the abductor muscles, however, no analyses of these configurations have been performed to determine which de...

Dual energy X-ray absorptiometry (DXA) is the reference standard method used to study bone mineral density (BMD) after total hip arthroplasty (THA). However, the subtle, spatially complex changes in bone mass due to strain-adaptive bone remodeling relevant to different prosthesis designs are not readily resolved using conventional DXA analysis. DXA region free analysis (DXA RFA) is a novel comp...

OBJECTIVE To explore the treatment strategies and clinical effect of the acetabular malunion with traumatic arthritis by total hip arthroplasty. METHODOLOGY A retrospective analysis was conducted on 47 cases of acetabular malunion with traumatic arthritis from June 2000 to December 2009. All the patients underwent total hip arthroplasty with bone grafting or titanium cage for bone defect of t...

INTRODUCTION At present there are no reliable non-traumatic and non- invasive methods to analyse the healing process and loosening status after total hip replacement. Therefore early as well as late loosening of prosthesis and interface component problems are difficult to be found or diagnosed at any time. METHODS In a cadaver study the potential application of Resonance Frequency Monitoring ...