Prosthetic alignment is an important factor in the overall fit and performance of a lower-limb prosthesis. However, the association between prosthetic alignment and control strategies used by persons with transfemoral amputation to coordinate the movement of a passive prosthetic knee is poorly understood. This study investigated the biomechanical response of persons with transfemoral amputation...

INTRODUCTION: Total knee arthroplasty (TKA) has become a standard operative procedure to relieve pain and restore function in patients with osteoarthritis. Polyethylene (Pe) mobile bearing (MB) inserts have been developed to minimize implant wear, prolong prosthesis survival and evoke less anterior knee pain due to better self-alignment. The aim of this study was to compare the clinical, radiol...

The optimal design of human lower limb prostheses, in particular of knee devices, is fundamental in order to restore the lost functionality and aesthetic aspect of the amputee’s locomotion. Among all knee devices, the four-bar linkage is still the most widespread mechanism, since, despite its simplicity, it allows the prosthesis to be sufficiently stable and, at the same time, to replicate the ...

This paper presents a novel method for stance and swing phase detection employing Learning Vector Quantization (LVQ), using knee angle information only. The results show detection accuracy of 95.9% in stance phase and 83.9% in swing phase. The research concludes an efficient replacement of footswitch for phase detection. The work can directly lead to low cost speed adaptive transtibial prosthes...

the finite element method (fem) is one of advanced methods in modeling of solid mechanics used in the design and analyzing of prosthesis in the human body. one of the important factors in designing a femur (the linkage between basin and knee) which is under complicated stresses is to minimize the amount of the stress in the components of the prosthesis due to the body weight. in this research t...

Temporary or preparatory prostheses for use by lower-extremity amputees have been mentioned frequently and used occasionally for many years (1, 2, 3, 4, 5), but they have not been adopted readily in the United States. Many reasons have been given why preliminary fitting has not been done and these have included: 1. stump damage because of malfitting plaster or other temporary socket, 2. rapid s...

Bilateral amputees who are fitted with standard full length prostheses find it difficult to walk fast or climb up and down stairs. Usually stubbies, or short prostheses with non-articulated rocker bottoms, are also provided, especially for geriatric amputees. An interchangeable system has been evolved which enables the same prosthesis to be used either as a full length prosthesis or as a stubby...

PURPOSE To review clinical results of total knee arthroplasty (TKA) in rheumatoid arthritis (RA) patients with large bone defects of the tibial condyle. METHODS Records of 33 knees in 27 women and 3 men aged 44 to 80 (mean, 63.6) years who underwent primary TKA for RA with large tibial bone defects were reviewed. 16 knees had peripheral defects extending to the bone cortex, whereas 17 knees h...

Five different commonly prescribed ankle-foot devices for below-knee prostheses were tested for effects on gait: SACH, SAFE, SEATTLE, SINGLE AXIS, and MULTIPLE AXIS. Subjective ratings by the amputees served to resolve which physical variables determined the preferred ankle-foot device. Ratings were related to age, body weight, length of residual limb, and ratio of stride frequency to stride le...