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Thumb Carpometacarpal Osteoarthritis: Arthrodesis Compared with Ligament Reconstruction and Tendon Interposition

Investigation performed at Hand Surgery Specialists and the Department of Orthopaedic Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio
Brian J. Hartigan, MD
Northwestern Center for Orthopedics, 676 North St. Clair Street, Suite 450, Chicago, IL 60611. E-mail address: bjhartigan{at}hotmail.com

Peter J. Stern, MD
Department of Orthopaedic Surgery, University of Cincinnati College of Medicine, P.O. Box 670212, Cincinnati, OH 45267

Thomas R. Kiefhaber, MD
Hand Surgery Specialists, 2800 Winslow Avenue, Suite 401, Cincinnati, OH 45206

The authors did not receive grants or outside funding in support of their research or preparation of this manuscript. They did not receive payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity. No commercial entity paid or directed, or agreed to pay or direct, any benefits to any research fund, foundation, educational institution, or other c­haritable or nonpr­ofit organization with which the authors are af­filiated or associated­.

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Background: There has been considerable controversy regarding the procedure of choice for treatment of any given stage of osteoarthritis of the thumb carpometacarpal joint. This study was designed to directly compare the clinical results of two common surgical procedures for this condition, trapeziometacarpal arthrodesis and trapezial excision with ligament reconstruction and tendon interposition, in similar patient populations.

Methods: Between 1988 and 1998, 109 patients (141 thumbs) who were less than sixty years old were treated with one of the two procedures. In a retrospective review, forty-two patients (fifty-eight thumbs) treated with arthro­desis completed an outcome questionnaire and twenty-nine patients (forty-four thumbs) treated with arthrodesis completed the questionnaire and were examined. In the group treated with trapezial excision with ligament reconstruction and tendon interposition, thirty-nine patients (forty-nine thumbs) completed the questionnaire and thirty patients (thirty-eight thumbs) completed the questionnaire and were examined. The average duration of follow-up was sixty-nine months. The groups were similar with regard to age, gender, hand dominance, and duration of follow-up.

Results: Subjective evaluation of pain, function, and satisfaction demonstrated no significant difference between the two groups, with >90% of patients satisfied following either procedure. Although grip strength did not differ between the groups, the arthrodesis group had significantly stronger lateral pinch (p < 0.001) and chuck pinch (p < 0.01). The group treated with ligament reconstruction and tendon interposition had a better range of motion with regard to opposition (p < 0.05) and the ability to flatten the hand (p < 0.0001). There was a higher complication rate in the arthrodesis group, with nonunion of the fusion site accounting for the majority of the complications. However, despite a persistent nonunion in six thumbs, those thumbs and the thumbs in which union was obtained did not differ with regard to pain; all of the patients with nonunion had improvement in their pain status compared with preoperatively, and all were very satisfied with the outcome. Peritrapezial arthritis developed in nine patients (fourteen thumbs). This finding was not related to age and did not affect overall pain, function, or satisfaction.

Conclusions: Although traditionally arthrodesis and ligament reconstruction and tendon interposition have been indicated in two different patient populations, we compared them in a homogeneous group and found that the two procedures had similar results with regard to pain, function, and satisfaction despite minimal differences in strength and motion. Although complications were more frequent following arthrodesis, most did not affect the overall outcome.

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