We use cookies to understand how you use our site and to improve your experience. This includes personalizing content and advertising. To learn more, click here. By continuing to use our site, you accept our use of cookies. Cookie Policy.

Features Partner Sites Information LinkXpress
Sign In
Advertise with Us
Abbott Diagnostics

Download Mobile App


ATTENTION: Due to the COVID-19 PANDEMIC, many events are being rescheduled for a later date, converted into virtual venues, or altogether cancelled. Please check with the event organizer or website prior to planning for any forthcoming event.
29 Aug 2020 - 02 Sep 2020
Virtual Venue

Artificial Joint Restores Natural Wrist Movements to Amputees

By HospiMedica International staff writers
Posted on 13 Dec 2018
Print article
Image: A wrist-like artificial joint acts interfaces between osseointegrated implants and a prosthetic hand (Photo courtesy of Chalmers University of Technology).
Image: A wrist-like artificial joint acts interfaces between osseointegrated implants and a prosthetic hand (Photo courtesy of Chalmers University of Technology).
A new study describes how an artificial joint reestablishes important wrist-like movements to forearm amputees, which could dramatically improve their quality of life.

Developed by researchers at Integrum (Mölndal, Sweden), Chalmers University of Technology (Göteborg, Sweden), and The BioRobotics Institute of Scuola Superiore Sant’Anna (Pontedera, Italy), the wrist prosthesis is based on an osseointegrated implant system placed into the two bones of the forearm--the ulna and radius--with an intermediate artificial joint that restores the functionality of the original distal-radioulnar joint, acting as an interface between the two osseous implants and the prosthetic hand.

By enabling the radius and the ulna to move with respect to each other, the natural range of wrist rotation is preserved, improving performance of activities of daily living and reducing compensatory movements that potentially lead to secondary health problems over time. The wrist device was fitted to an osseointegrated transradial amputee and its functionality assessed by a battery of tests, revealing that it can successfully restore natural forearm rotation, resulting in more naturalistic movements with intuitive natural control and sensory feedback. The study was published on November 13, 2018, in IEEE Transactions on Neural Systems & Rehabilitation Engineering.

“Depending on the level of amputation, you could still have most of the biological actuators and sensors left for wrist rotation. These allow you to feel, for example, when you are turning a key to start a car,” said senior author Max Ortiz Catalan, PhD, of Chalmers University of Technology. “You don't look behind the wheel to see how far to turn -- you just feel it. Our new innovation means you don't have to sacrifice this useful movement because of a poor technological solution, such as a socket prosthesis. You can continue to do it in a natural way.”

One of the major obstacles to an amputee in regaining a high level of function is the inability to rotate the wrist in order to perform pronation and supination movements. This twisting motion is used every day, whether to turn a door handle, use a screwdriver, start a car or simply to turn over a piece of paper. Current prosthetic technologies offer only limited relief to this problem.

Related Links:
Chalmers University of Technology
The BioRobotics Institute of Scuola Superiore Sant’Anna

Print article



view channel

Siemens to Acquire Varian Medical to Create Comprehensive Cancer Portfolio

Siemens Healthineers (Erlangen, Germany) has entered into an agreement to acquire Varian Medical Systems, Inc. (Palo Alto, CA, USA) that will lead to the creation of a global leader in healthcare with... Read more
Copyright © 2000-2020 Globetech Media. All rights reserved.