Radial shortening for Kienböck disease

Area of Science:

• Orthopedic Surgery
• Hand Surgery
• Musculoskeletal Research

Background:

• Kienböck disease is a condition affecting the lunate bone in the wrist.
• Stages I through IIIB Kienböck disease often present with pain and limited wrist function.
• Negative ulnar variance is a common radiographic finding in affected wrists.

Purpose of the Study:

• To evaluate the efficacy of radial shortening for treating Kienböck disease.
• To assess changes in pain, range of motion, grip strength, and radiographic appearance post-procedure.
• To identify potential complications associated with radial shortening surgery.

Main Methods:

• Retrospective review of 29 patients (30 wrists) undergoing radial shortening for Kienböck disease.
• Radiographic analysis including assessment of ulnar variance and lunate collapse.
• Clinical evaluation of pain, wrist range of motion, and grip strength at an average 3.8-year follow-up.

Main Results:

• 87% of patients reported decreased pain.
• Significant improvements observed in wrist extension (32%), flexion (27%), radial deviation (30%), ulnar deviation (41%), and grip strength (49%).
• No significant changes in lunate collapse were noted; two cases had complications (excessive shortening, non-union).

Conclusions:

• Radial shortening is an effective treatment for Kienböck disease stages I-IIIB without carpal joint degeneration.
• The procedure leads to significant improvements in patient-reported pain and functional outcomes.
• Radiographic progression of lunate collapse is minimal, but surgical complications should be considered.