In vitro biomechanical analysis after cervical disc replacement (CDR) with a novel artificial disc prosthesis (mobile core) was conducted and compared with the intact model, simulated fusion, and CDR with a fixed-core prosthesis. The purpose of this experimental study was to analyze the biomechanical changes after CDR with a novel prosthesis and the differences between fixed- and mobile-core pr...

A Syme amputation, which is the most conservative below-the-knee amputation and which provides the best functioning stump for weight-bearing, has been rarely recommended for women, because the unsightly prosthesis is objectionable. Some time ago it was necessary to amputate the foot of a female patient, twenty-two years old. After a conference with the young woman, it was decided that the many ...

The motion of the current prostheses is sequential and does not allow natural movements. In this work, complex natural motion patterns from a healthy upper limb were characterized in order to be emulated for a trans-humeral prosthesis with three degrees of freedom at the elbow. Firstly, it was necessary to define the prosthesis workspace, which means to establish a relationship using an artific...

Technology[1] Technology[1]Inventions [2]Robots [3]The Body [4]Denmark [5]Videnskab.dk [6] A new hand prosthesis enables an amputee to feel a handshake for the first time in years. A quantum leap in prosthesis research, says scientist. Scientists have created a hand prosthesis that not only receives and responds to brain signals, but also sends information back to the brain. This means, for ins...

In this work, we present a model for human leg with prosthetic foot, consisting of rigid bodies the thigh and shank geometrically exact beam prosthesis. The prosthesis is modelled after Össur Vari-Flex® carbon spring foot. individual are connected by joints imposing constraints, mimicking motions joints. A structure preserving variational integrator used to calculate forward dynamic simulation ...

BACKGROUND An artificial disc prosthesis is thought to restore segmental motion in the lumbar spine. However, it is reported that disc prosthesis can increase the intervertebral translation (VT). The concept of the mobile-core prosthesis is to mimic the kinematic effects of the migration of the natural nucleus and therefore core mobility should minimize the VT. This study explored the hypothesi...

Individuals with upper-limb amputations may currently use artificial limbs controlled with signals from their residual muscles. Pattern recognition, one type of advanced control, uses the patterns produced by several muscles to control prosthesis movements. This article describes a new way to test this control by using a virtual environment performance test called the Target Achievement Control...

Half a century ago, replacement of diseased heart valves with an artificial prosthesis ushered a new era in the cardiovascular medicine. New solutions to complex problems frequently create new problems of their own that require innovative solutions. Paraprosthetic regurgitation through an opening between the prosthesis and the annulus of the valve is one such challenge. Although much less frequ...