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Joint leveling for advanced Kienböck's disease
Ryan P Calfee1, Marlo O Van Steyn, Cassie Gyuricza
1Department of Orthopaedic Surgery, Washington University School of Medicine at Barnes-Jewish Hospital, St Louis, MO63110, USA. calfeer@wudosis.wustl.edu
Purpose:
The use of joint leveling procedures to treat Kienböck's disease have been limited by the degree of disease advancement. This study was designed to compare clinical and radiographic outcomes of wrists with more advanced (stage IIIB) Kienböck's disease with those of wrists with less advanced (stage II/IIIA) disease following radius-shortening osteotomy.
Methods:
This retrospective study enrolled 31 adult wrists (30 patients; mean age, 39 y), treated with radius-shortening osteotomy at 2 institutions for either stage IIIB (n = 14) or stage II/IIIA (n = 17) disease. Evaluation was performed at a mean of 74 months (IIIB, 77 mo; II/IIIA, 72 mo). Radiographic assessment determined disease progression. Clinical outcomes were determined by validated patient-based and objective measures.
Results:
Patient-based outcome ratings of wrists treated for stage IIIB were similar to those with stage II/IIIA (shortened Disabilities of the Arm, Shoulder, and Hand score, 15 vs 12; modified Mayo wrist score, 84 vs 87; visual analog scale pain score, 1.2 vs 1.7; visual analog scale function score, 2.6 vs 2.1). The average flexion/extension arc was 102° for wrists with stage IIIB and 106° for wrists with stage II/IIIA Kienbock's. Grip strength was 77% of the opposite side for stage IIIB wrists versus 85% for stage II/IIIA. Postoperative carpal height ratio and radioscaphoid angle were worse for wrists treated for stage IIIB (0.46 and 65°, respectively) than stage II/IIIA (0.53 and 53°, respectively) disease. Radiographic disease progression occurred in 7 wrists (6 stage II/IIIA, 1 stage IIIB). The one stage IIIB wrist that progressed underwent wrist arthrodesis.
Conclusions:
In this limited series, clinical outcomes of radius shortening using validated, patient-based assessment instruments and objective measures failed to demonstrate predicted clinically relevant differences between stage II/IIIA and IIIB Kienböck's disease. Given the high percentage of successful clinical outcomes in this case series of 14 stage IIIB wrists, we believe that static carpal malalignment does not preclude radius-shortening osteotomy.
Type Of Study/Level Of Evidence:
Therapeutic IV.
