A systematic review and meta-analysis of arthroscopic assisted techniques for thumb carpometacarpal joint osteoarthritis.

Arthroscopic management of thumb carpometacarpal (CMC) osteoarthrosis (OA) is an approach that has unclear results. We performed a systematic review encompassing three electronic databases up to May 2016 for studies describing arthroscopic-assisted techniques for thumb CMC OA. Meta-analyses of visual analogue scores (VAS) for pain, Disabilities of the Arm, Shoulder and Hand (DASH) scores, grip strength and pinch strength before and after arthroscopy were performed for ten included non-randomized cohort studies comprising 294 patients. Based on Hedges' g measure, we found a large effect on VAS and DASH scores, a small effect on grip strength and no effect on pinch strength. On average, VAS improved by 4.1 cm, DASH by 22 points and grip strength by 2.8 kg. Complications were reported in 4% of patients. The use of arthroscopic-assisted techniques for thumb CMC OA is still limited; however, it may be a reasonable option for patients with thumb CMC OA who do not respond to non-operative treatment.