Motec Wrist Prosthesis System
The Motec® Wrist Joint Prosthesis has been designed with the objective to provide a strong, stable, mobile and pain free wrist while minimizing the risk of luxation, loosening and osteolysis.
The overall clinical results achieved with the Motec Wrist Joint Prosthesis are very promising. In the end of 2016, more than 1.000 surgeries have been performed. The longest follow-up time is +15 years. Recent studies indicate a survival rate of approximately 80% at 10 years follow up for OA-patients.
Fixation is achieved by threaded implants made of titanium alloy, blasted and coated with Bonit®, which promotes osseointegration between the titanium oxide and the bone.
The articulation is modular and can be configured depending on surgeon and patient preference, either with CoCrMo articulation on ceramic coated CoCrMo or CoCrMo articulation on carbon fiber reinforced PEEK Motis™.
Swemac also provides a fully compatible salvage procedure through the unique Motec Wrist Arthrodesis System, which utilizes the pre-existing prosthesis implants for fixation.
Each component is available in different sizes, to allow firm seating and close replication of the patient’s normal range of motion.
The Motec Wrist Prosthesis is indicated as replacement of the wrist joint in cases with pain, malalignment or instability due to rheumatoid arthritis, traumatic arthritis, osteoarthritis, Kienböck’s disease or carpal collapse. The system may also be indicated after failed wrist surgery such as four corner fusion, proximal row carpectomy, or arthrodesis.
Allows 136°-160° range of motion (ROM).
Pin-on-plate screening of polymer against hard counterface combinations. Source: Invibio Biomaterial Solutions
The limited bone resection ensures that a secondary arthrodesis procedure can be performed. This procedure can also be further simplified by the Motec Wrist Arthrodesis device, which utilizes the existing threaded implants for fixation whenever possible.
Most of the soft tissue and ligament structures between the radius, ulna and the carpal bones are preserved, maintaining the natural stability of the wrist. The distal radio-ulnar joint is unaffected by the presence of the wrist prosthesis. The peripheral rim of the distal radius is preserved, along with its important ligamentous and soft tissue attachments.
Without BonitWithout Bonit there would be a significant reduction in stability 2-5 weeks postoperatively. This dip coincides with the release of the plaster, thereby increasing the risk of loosening.
With BonitBonit promotes early formation of new bone, thereby reducing the risk of loosening.
Keplan-Meier survival curve