Basic Information
The MOTEC wrist joint prosthesis is designed with the objective to reduce the risk of subluxation and loosening by:
- Limit bone resection
- Preserve soft tissue and ligament structures
- Improve short term fixation
- Optimize long term fixation
- Reduce the risk of failure associated with long term use
Key Features
The MOTEC® wrist joint prosthesis is a modular prosthesis consisting of four parts, providing the surgeon with 144 combinations closely replicating the patient’s normal wrist joint range of motion.
The articulation is metal-to-metal with ball and socket articulation made of cobalt chrome molybdenum alloy treated with chromium nitride. Fixation is achieved by threaded implants made of titanium alloy, blasted and coated with Bonit®, which is a resorbable calcium phosphate combination with proven osteoconductive properties.
The operative procedure is straight forward and easy to learn.
Indications
Indication for the MOTEC wrist joint prosthesis is pain and reduced motion of the wrist caused by rheumatoid arthritis, primary osteoarthrosis and secondary arthrosis due to Kienböck´s disease of the lunate, non-unions of fracture of the scaphoid, wrist instability, and fracture of the distal radius.
The ball and socket design have several advantages
- Increased range of motion (ROM) 136°–160°.
- Increased stability, especially in patients with poor soft tissue.
- The MOTEC wrist joint prosthesis is closely replicating the anatomical center of rotation during both flexion/extension and ulna/radial deviation (Ref. 1).
- The ball and socket articulation diverts rotational forces from the bone implant interface that can cause loosening.
- Can resist forces that cause subluxation (no subluxations have been reported in more than 250 patients).
