Partial arthroscopic trapeziectomy with or without ligament reconstruction to treat primary thumb carpometacarpal joint osteoarthritis.

Many surgical options have been proposed for the treatment of first carpometacarpal (CMC1) osteoarthritis. Conventional techniques are invasive, so we wanted to develop an arthroscopic technique. Partial trapeziectomy combined with various interpositions and ligament reconstruction is a long-standing intervention. As in total trapeziectomy, the combination with ligament reconstruction remains controversial. The aim of this study was to demonstrate the benefits of adding an abductor pollicis longus (APL) ligament reconstruction to partial trapeziectomy performed under arthroscopy. This study analyzes the results of two consecutive case series carried out by a single surgeon. Thirty-four patients underwent an isolated partial trapeziectomy and 49 patients underwent partial trapeziectomy with ligament reconstruction using the APL. The patients were reviewed with an average follow-up of 3.7 years (13 months to 8.6 years) by an independent observer. The assessment included the analysis of pain, thumb appearance, QuickDASH score, Nelson Hospital score, and measurements of mobility and strength. For all patients, there was a marked reduction in pain (7.13 preoperatively vs.1.37 postoperatively) with 71% of patients having a painless thumb, the Nelson (11.14) and QuickDASH (17.89) scores as well as a clinical improvement in mobility and grip strength (14.5 KgF preop vs. 19.6 KgF postop) and key pinch (4.4 KgF preop vs. 5.4 KgF postop). The mean recovery time was 18.8 weeks. Eighty-four percent of patients were satisfied with the procedure with 90% having a stable thumb. No CRPS was found. However, the results were better for patients who underwent ligament reconstruction. There was a significant gain in grip strength, better first web opening and a lower percentage of painful thumbs. The other items were also slightly improved, but not significantly (Nelson Hospital score, QuickDASH score, key grip strength, percentage of stable thumbs, subjective thumb value estimated by patients). This technique is a less aggressive treatment of CMC1 osteoarthritis, with simplified and rapid rehabilitation. The addition of ligament reconstruction using the APL appears useful. The advantages of arthroscopy are a less painful postoperative course, low morbidity, ligament conservation, along with better access to remove loose bodies, osteophytes and to perform synovectomy. Partial trapeziectomy, which is especially indicated when the scaphotrapeziotrapezoid joint is not symptomatic, is much less used than total trapeziectomy; however, it is an attractive surgical option for young patients with significant functional demands. Arthroscopic partial trapeziectomy is a safe and reliable procedure.