Introduction Many studies have shown that early onset of degenerative arthritis of the knee is a common result of (partial) meniscectomy [1]. Studies in dogs showed that a meniscal prosthesis made of a biodegradable porous polymer can act as a temporary scaffold for the regenerating tissue and that degenerative changes of articular cartilage were less than seen after meniscectomy [2,3]. In our ...

Background. Total knee arthroplasty (TKA) is currently the "gold standard" in the treatment of advanced gonarthrosis. Improved range of motion, reduced pain, and correction of the limb axis, which are the main treatment goals, depend on proper surgical technique. The usable life of the knee prosthesis and the patient's comfort are the main criteria for evaluating long-term surgical outcome in T...

INTRODUCTION The Triathlon(®) (Stryker, Kalamazoo, MI, US) total knee replacement was designed to improve patient function and survivorship. The aim of this study was to determine whether the Triathlon(®) prosthesis produces better patient reported outcomes than a previous design by the same manufacturer, the Kinemax Plus. METHODS The outcome of 233 knees of patients with a mean age of 68 yea...

Introduction Conventional below-knee prostheses are manufactured of rigid materials for durability and stability. The use of glass fibre and resin composite materials to form the rigid shank of the below-knee prosthesis is well established in many countries and forms part of the modern practice of cosmetic prosthesis manufacture. While these materials are strong, durable , easily worked and cos...

In this paper after reviewing some previous studies, in order to optimize the above knee prosthesis, beside the inertial properties a new controlling parameter is informed. This controlling parameter makes the prosthesis able to act as a multi behavior system when the amputee is opposing to different environments. This active prosthesis with the new controlling parameter can simplify the contro...

There are many conditions that may be responsible of a painful knee prosthesis. The possible causes are not always easily diagnosed. Common causes of prosthetic failure, such as aseptic loosening, infection, instability, progressive patellar arthropathy and recurrent synovitis are associated with clearly defined radiographic and/or clinical evidence. Prosthetic infection should always be consid...

Range of motion after knee replacement is an important factor in overall outcome. The purpose was to compare motion in patients receiving high flexion prosthesis vs. standard prosthesis. 24 high flexion and standard knee prostheses were used. Patients were followed for two years and evaluated prospectively. The mean HSS was 80.4 for the standard group and 80.7 for the flexion group. At two year...

In this paper we analyze the anatomic elements that compose the human knee joint. Also, we build the spatial model of the human knee joint components. This study is necessary for the design of prosthesis elements and for the establishment of the necessary prosthesis technique.

Most of the energy needed for ambulation is generated during the double support phase of walking. Knee flexion during push-off is crucial to maintain the walking velocity. Since users of an above-knee prosthesis have to stabilize the knee with the hip muscles, and regular knee mechanisms are not stable during flexion, this may cost a large effort. This paper deals with experimental findings of ...