Chondrosarcoma is a malignant cartilage-forming neoplasm. It is difficult to treat because of resistance to both chemotherapy and radiation, making wide local excision the only treatment. This report presents an active, 43 year-old man who was diagnosed with recurrent clear cell chondrosarcoma of the proximal left femur, previously reconstructed with a total hip prosthesis, extending to the wei...

BACKGROUND Treatment of the sequelae of congenital high luxation of the hip joint is a major challenge in prosthetic surgery, demanding from the operator thorough familiarity with the problem and experience in hop reconstructive surgery. MATERIAL AND METHOD The results of 4 years observation, of the treatment of 14 woman in the average age of 38 years old with 18 hip joints with congenital hi...

We quantify how the hip energetics and knee torque required for an above-knee prosthesis user to walk with the kinematics of able-bodied humans vary with the inertial properties of the prosthesis. We also select and optimize passive mechanical components for a prosthetic knee to accurately reproduce the required knee torque. Previous theoretical studies have typically investigated the effects o...

Vascular trauma after hip surgery has been described mostly after elective total hip arthroplast)~ but there have also been a number of cases after hip fracture surgery. Re-operation increases this risk in elective total hip arthroplastyJ Arterial injury complicating hip replacements are rare 2 and usually occur at the time of operation. Delayed arterial injury may result from a false aneurysm ...

Hip resurfacing is an established treatment for osteoarthritis in young active patients. Failure modes include femoral neck fracture and prosthesis loosening, which may be associated with medium-term bone adaptation, including femoral neck narrowing and densification around the prosthesis stem. Finite element modelling was used to indicate the effects of prosthesis sizing and positioning on the...

We report the case of an acute hip septic arthritis caused by Gardnerella vaginalis in a 48-year-old woman under immunosuppressive therapy for kidney transplantation. After surgical resection of the hip and 6 weeks of combination antibiotic therapy, a total hip prosthesis was successfully implanted with no recurrence after 4 years.

In view of the fact that endo-prosthesis heads human hip-joint are operated in extreme conditions, respect load, selection corresponding material and also increase precision quality machining spherical surfaces is rather topical task. submitted work reviewed problems connected with definition influence degree orientation sapphire crystal on its workability during diamond grinding a butt ring el...

INTRODUCTION Stress-shielding following uncemented hip replacement causes bone remodelling due to alteration of the load transfer pathways. The degree of bone resorption is related to the geometry and bending stiffness of the stem. Large diameter, cobalt chrome stems are attributed with producing the most pronounced bone loss. The Epoch hip prosthesis (Zimmer Inc., Warsaw, IN) is a low bending ...

Dislocation of a total hip prosthesis is a painful and mentally stressful orthopaedic emergency.1 It may be long-standing and asymptomatic, typically involving the femoral portion.2-4 This report describes a peculiar chronic dislocation of both components of a total hip prosthesis. A 93-year-old female patient, thin and of short stature, had come to our attention for recent onset of lumbar pain...

Fifty-seven cemented total hip arthroplasties (THAs) were reviewed in cases of osteoarthrosis secondary to congenital dysplasia or dislocation. The bearing surface of the prosthesis used in this series consists of a polyethylene acetabular component on an alumina ceramic head. All acetabular components were positioned at the same level as the original acetabulum, and an autologous femoral head ...