Joint replacement is the most effective healthcare measure in improving patient quality-of-life outcomes. More than 46000 hip and knee replacements were performed in Australia between July 2000 and July 2001. The need for joint replacements will increase as the population ages. More than 90% of hip and/or knee replacements survive for 10-15 years. Prosthesis selection needs to be tailored to ea...

Pigmented Villonodular Synovitis (PVNS) is a relatively rare, benign proliferation lesion of the synovium of large joints. The etiology is varied and unclear. We had report a 79-year-old woman had PVNS after 14 years right hip arthroplasty with metal prosthesis. Here we report another 4 patients had PVNS after arthroplasty. The second one had PVNS in the 2(th) year after hip arthroplasty with b...

Abstract This article proposes, describes, and tests a swing-assist walking controller for stance-controlled, swing-assisted knee prosthesis that aims to combine benefits of passive swing mechanics (e.g., quiet operation, biomimetic function, low power requirements) with powered assistance increased robustness swing-phase motion specifically toe clearance). A three-participant, multislope, mult...

Bipolar hemiarthroplasty of the hip joint has been used for the treatment of femoral neck fractures and osteonecrosis of the femoral head.1-2 This prosthesis originally was believed to decrease shear stress on the acetabular cartilage, resulting in decreased migration.3,4 However, osteolysis of the acetabulum and migration of the head have been reported after bipolar hemiarthroplasty.5-7 This a...

For revision knee surgery with uncontained tibial bone defects, the authors report the containment of compacted morsellized allograft using metal-wire mesh, followed by implantation of a cemented total knee prosthesis. This method is comparable to the "impaction grafting technique" described for revision hip surgery and could be an alternative to metal wedges, augmented components, custom-made ...

INTRODUCTION The aim of this study was to look at the different claims made about hip resurfacing arthroplasty in the popular UK print media and how this relates to findings in the scientific literature. METHODS A review of UK popular print media from January 1992 to June 2011 was performed using the Lexis(®) Library online news database. Only articles discussing the clinical results of hip ...

OBJECTIVE The study aims to compare the stress shielding effects of implantable anatomical and traditional prostheses after in vitro total hip joint replacement simulation. The study serves as a biomechanical basis for novel artificial prostheses and for clinical hip joint replacements. METHODS Sixteen femoral specimens from adult male corpses were randomly divided into two groups: the tradit...

Stress shielding and bone remodeling effects are critical issues in promoting long term stability of Total Hip Arthroplasty (THA). Stress shielding occurs when the femur experiences less stress after the presence of the prosthesis stem. In this study, biomechanical evaluations of lower limbs are established using the finite element method in corresponding to stress distributions. Lower limbs CT...

Background. The goal of our study was to assess the efficacy of total hip replacement in the treatment of dysplastic arthrosis of the hip. Material and methods. Between November 2001 and June 2003 we performed total hip replacement in 40 patients (46 hips). Arthritic deformations were classified according to Crowe's classification scheme and operated using a variety of techniques and prostheses...

Based on a case report in which wear of the polyethylene liner in an uncemented hip prosthesis led to the development of an intrapelvic mass, the pathogenesis, diagnosis and treatment are described. Characteristic osseous and soft tissue reactions caused by release of polyethylene particles to periarticular tissue are discussed as well as the differential diagnosis with infectious and malignant...