Midterm Functional Outcome of the Linked Semiconstrained Distal Radioulnar Joint Prosthesis.

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Reconstructive Surgery

Background:

• Painful, unstable distal radioulnar joint (DRUJ) significantly impairs hand and wrist function.
• Semiconstrained prostheses aim to restore DRUJ function.
• Previous outcome reports often lack independent verification.

Purpose of the Study:

• To independently evaluate the outcomes of semiconstrained DRUJ prostheses.
• To assess complication and failure rates associated with the prosthesis.

Main Methods:

• Retrospective evaluation of 41 patients (42 implants) with a minimum 2-year follow-up.
• Assessment of patient satisfaction, wrist range of motion, grip, and key pinch strength.
• Statistical analysis including descriptive statistics and regression models.

Main Results:

• Mean follow-up was 46 months; 80% of wrists had prior surgery.
• Achieved functional outcomes include mean pronation 83°, supination 70°, flexion 42°, extension 49°.
• Reported a 43% complication rate, 24% reoperation rate, and 92% prosthesis survival rate.

Conclusions:

• The semiconstrained DRUJ prosthesis is valuable for treating DRUJ failure, particularly in revision cases.
• High complication and reoperation rates warrant careful consideration.
• Further research is necessary to determine the prosthesis's efficacy as a primary surgical option.