Abstract
Background
Trapeziometacarpal (TM) arthroscopy should be viewed as a useful minimally invasive adjunctive technique rather than the operation itself since it allows one to visualize the joint surface under high-power magnification with minimal disruption of the important ligamentous complex. Relatively few articles describe the arthroscopic treatment of TM osteoarthritis (OA) and the arthroscopic anatomy of the TM joint. There is lingering confusion as to whether soft tissue interposition and K-wire fixation of the joint are needed and whether the outcomes of arthroscopic procedures compare to the more standard open techniques for TM arthroplasty.
Questions/purposes
This paper describes (1) the arthroscopic ligamentous anatomy of the TM joint, (2) the portal anatomy and methodology behind TM arthroscopy, and (3) the arthroscopic treatment for TM OA, including the current clinical indications for TM arthroscopy and the expected outcomes from the literature.
Methods
A MEDLINE® search was used to retrieve papers using the search terms trapeziometacarpal, carpometacarpal, portal anatomy, arthroscopy portals, arthroscopy, arthroscopic, resection arthroplasty, and arthroscopic resection arthroplasty. Eighteen citations satisfied the search terms and were summarized.
Results
Careful wound spread technique is needed to prevent iatrogenic injury to the surrounding superficial radial nerve branches. Traction is essential to prevent chondral injury. Fluoroscopy should be used to help locate portals as necessary. Cadaver training is desirable before embarking on a clinical case. Questions regarding the use of temporary K-wire fixation or thermal shrinkage or the need for a natural or synthetic interposition substance cannot be answered at this time.
Conclusions
Longitudinal prospective studies are needed to answer these lingering questions. An intimate knowledge of the portal and arthroscopic anatomy is needed to perform TM arthroscopy. Minimally invasive techniques for resection arthroplasty in TM OA with and without soft tissue interposition can yield good outcomes in the treatment of TM OA.
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Slutsky, D.J. The Role of Arthroscopy in Trapeziometacarpal Arthritis. Clin Orthop Relat Res 472, 1173–1183 (2014). https://doi.org/10.1007/s11999-012-2673-0
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DOI: https://doi.org/10.1007/s11999-012-2673-0