Arthroscopic Subtalar Arthrodesis as a Treatment Strategy for Subtalar Arthritis: A Systematic Review

Arthroscopic subtalar arthrodesis is a relatively new technique which is increasingly being used by foot and ankle surgeons as an alternative to open surgery. However, there is still a lack of consensus with respect to the efficacy of the procedure. The purpose of this review was to ascertain (1) whether arthroscopic subtalar arthrodesis improves the functional outcome of treated patients and (2) how do the 2 techniques of subtalar arthroscopy (posterior and lateral) compare with each other. MEDLINE and Cochrane Library databases were accessed by 2 independent reviewers. Inclusion/exclusion criteria were predefined. National Institute of Health risk of bias assessment tool was used to determine the methodological quality of the included studies. A total of ten studies with 234 patients (240 feet) were included. The most common indication for arthroscopic subtalar fusion was posttraumatic subtalar arthritis. Weighted pre- and postoperative American Orthopaedic Foot and Ankle Society scores were 47 and 80.7, respectively. Average time to fusion was 10.2 weeks and weighted mean fusion rate was 95%. Pain secondary to prominent hardware and nonunion were the most common complications. Although improvement in functional scores was higher and complication rate lower with the posterior group, a better fusion rate was seen with the lateral approach. Arthroscopic fusion techniques have shown to be an effective alternative to open surgery. While there was a trend for better functional outcome with the posterior approach, randomized control trials comparing the 2 techniques are needed to better assess their respective outcomes.