Universal Total Wrist Implant: experience with a carpal component fixed with three screws

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Rheumatology

Background:

• Pancarpal arthritis significantly impacts wrist function and quality of life.
• Total wrist arthroplasty is a surgical option for managing severe wrist arthritis.
• Existing prostheses have varying fixation methods and complication rates.

Purpose of the Study:

• To evaluate the efficacy and safety of the Universal Total Wrist Implant for pancarpal arthritis.
• To assess pain relief, functional outcomes, and complication rates associated with this implant.
• To compare the fixation method of the Universal Total Wrist Implant to other prostheses.

Main Methods:

• A retrospective study of 31 patients (37 wrists) with pancarpal arthritis treated with the Universal Total Wrist Implant.
• Mean patient age was 58.1 years, with follow-up ranging from 48 to 120 months (mean 79.4 months).
• The implant features a carpal component fixed to the capitate with titanium screws and a radial component with a 20-degree inclination.

Main Results:

• Excellent pain relief was achieved in 88% (30 out of 34) of wrists.
• Complications occurred in 32% (12 cases), with dislocation being the most common.
• 9 out of 12 complications resolved with treatment; 3 prostheses were removed due to infection or dislocation.

Conclusions:

• The Universal Total Wrist Implant demonstrates a high rate of pain relief and motion preservation in patients with pancarpal arthritis.
• Its unique fixation in the capitate and intercarpal fusion contribute to improved longevity.
• While dislocation is a risk, the implant offers a predictable surgical option for wrist arthritis management.