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Long-term Outcomes for Late-Phase Kienböck's Tenoarthroplasty
Mark Henry1, Forrest H Lundy1, Giselle K Henry1
1Hand & Wrist Center of Houston, TX, USA.
Background:
In late Kienbӧck's, the lunate is fully fragmented and nonreconstructible. Replacing the lunate with a pyrocarbon prosthesis preserves load distribution and avoids carpectomy or fusion, but leaves the wrist intrinsically unstable, requiring additional soft-tissue stabilization techniques.
Methods:
Five men and 7 women with a mean age of 43 (±15) years underwent prosthetic replacement of the lunate with dual bundle scaphoid-triquetrum tenodesis for carpal stabilization. The mean follow-up interval from initial surgery was 9.1 (±1.7) years. Outcomes were Disabilities of Arm, Shoulder, and Hand (DASH) score, revision or conversion surgery, and wrist range of motion.
Results:
The mean DASH score was 8.9 (±7.1). No patients reported any additional revision or conversion surgery. The mean wrist flexion was 60° (±14°); wrist extension was 45° (±21°).
Conclusions:
Clinical outcomes proved more favorable than anticipated, particularly the self-rated outcomes scores and the absence of any revision or conversion surgery.
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