Scaphotrapeziotrapezoidal Joint Osteoarthritis: A Systematic Review of Surgical Treatment.

Background: The management of scaphotrapeziotrapezoidal (STT) joint osteoarthritis (OA) remains controversial. This systematic review aims to review the evidence for surgical interventions specific to STT OA.

Methods: Medline and Embase libraries were searched using a pre-defined search strategy in October 2014. All study designs and languages were included and evaluated by two reviewers (VMD and LM) against the inclusion/exclusion criteria. The study eligibility criteria included papers discussing surgical treatment of STT OA, and the review was conducted using the PRISMA guidelines.

Results: 295 unique results were identified from the search strategy after duplicates were filtered. 21 articles met the eligibility criteria.

Conclusions: Trapezial excision and partial trapezoidal excision is an effective treatment with low morbidity and complications, although can lead to weakness of the thumb. Distal scaphoid excision remains an effective pain relief treatment with improved grip and pinch strengths post-operatively. The procedure is technically less demanding than arthrodesis, does not carry the risks of non-union and complication rate of STT joint arthrodesis, and has a shorter immobilisation requirement. It produces reliable results, but is contraindicated if there is either scapholunocapitate pathology or midcarpal instability. STT joint fusion has a place, typically producing 75% range of movement of the non-operated wrist. However it has a higher associated complication rate, and simultaneous radial styloidectomy is recommended to reduce ongoing pain from impingement. Implant arthroplasty using a graphite-coated pyrocarbon implant has been used more recently. The patients gained significant pain relief, although there have been reports of implant dislocation secondary to surgical errors. A reduction in post-operative wrist extension and radial deviation has been noted. From this systematic review, we have composed a treatment algorithm for the surgical management of STT joint OA.