Reconstruction of an early stage SLAC wrist with the 3-LT procedure: A controversial reappraisal.

OBJECTIVE: We hypothesized that the three-ligament tenodesis (3-LT) procedure is still sufficient - even in scapholunate advanced collapse (SLAC) cases - to reduce pain and improve wrist function. We compared patient-reported outcomes of scapholunate interosseus ligament (SLIL) injury patients with SLAC to SLIL injury patients treated with 3-LT, and then to patients who received proximal row carpectomy (PRC), as a control group.

METHOD: We included all patients with a traumatic SLIL injury and associated SLAC components treated with 3-LT and completed Patient Reported Wrist Evaluation (PRWE) questionnaires preoperative and at 12 months follow-up. First, we compared matched patients with SLIL injury and SLIL injury with SLAC, stage 1-3, who received 3-LT. Second, we compared patients who received 3-LT, with patients who underwent PRC, while having SLAC stage 2-3.

RESULTS: We compared 51 patients with SLAC to 95 with SLIL injury who had a 3-LT procedure, and 10 3-LT patients were compared to 18 patients undergoing PRC, given SLAC 2-3. In both analyses, the PRWE scores had significantly improved in all groups, however no significant differences in PRWE were found between 3-LT in SLIL injury and SLIL injury with SLAC, 6.9 points (95% CI [-14.92; 1.22], p = 0.096) and between 3-LT and PRC, given SLAC stage 2-3, 15.1 points (not enough power).

CONCLUSION: There is no difference in PRWE between matched SLIL injury patients with or without degenerative changes treated with a 3-LT. Therefore, the 3-LT procedure seems to be a viable treatment option for patients with early-stage SLAC wrist.

LEVEL OF EVIDENCE: Therapeutic III.