A New Cemented Hip Prosthesis Concept

Asymptomatic Chronic Dislocation of a Cemented Total Hip Prosthesis

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...

Cemented versus uncemented femoral components in the ring hip prosthesis.

A prospective, randomised and independently assessed trial of the Ring UPM total hip replacement showed that the quality of the early result was better if the femoral prosthesis was cemented than if it was not. More patients with cemented prostheses were painfree at four months (58% cemented:42% uncemented) and at one year (63% cemented:50% uncemented), but at two years pain relief was equal in...

Toward verified and validated FE simulations of a femur with a cemented hip prosthesis.

BACKGROUND Verified and validated CT-based high-order finite element (FE) methods were developed that predict accurately the mechanical response of patient-specific intact femurs. Here we extend these capabilities to human femurs undergoing a total hip replacement using cemented prostheses. METHODS A fresh-frozen human femur was CT-scanned and thereafter in vitro loaded in a stance position u...

A new prosthesis for arthroplasty of the hip.

A new prosthesis for disarticulation at the hip.

The locomotor problem in bilateral disarticulation at the hip is serious because there is no natural motive power left to help swing either limb forward, and the physiological mechanism used in unilateral disarticulation is no longer available. The only motive power is pelvic and spinal in origin. To overcome this, a new “ swing door “ hinge prosthesis has been developed, which is particularly ...