Comparison of Isolated Screw to Plate and Screw Fixation for Tarsometatarsal Arthrodesis Including Clinical Outcome Predictors.

BACKGROUND

The common treatment for end-stage tarsometatarsal (TMT) arthritis is an arthrodesis of the affected joints. This study was performed to examine the clinical and radiographic outcome after TMT arthrodesis and to identify risk factors for postoperative complications.

METHODS

A total of 101 patients with tarsometatarsal arthritis of at least 2 joints were retrospectively examined. Data were acquired using clinical and radiographic examination, pedobarographic analysis, and standardized questionnaires, including the European Foot and Ankle Society Score, the Foot and Ankle Outcome Score, a pain numeric rating scale (NRS), the 36-Item Short Form Health Survey, and the University of California at Los Angeles Activity (UCLA) Score. The fixation technique, any complications, and revision surgery were recorded.

RESULTS

All scores improved significantly, except for the UCLA Score. The mean pain NRS score was significantly reduced from 7.7 preoperative to 3.0 postoperative (P < .05). The overall nonunion rate was 12.6%. Compared with 2 crossed-screw fixation, locking plate plus compression screw fixation was associated with a decreased nonunion rate (odds ratio [OR] 0.165, 95% confidence interval [CI] 0.032-0.854; P = .017). A body mass index >27 was significantly associated with a higher nonunion rate and wound healing problems (OR 12.05, 95% CI 1.430-101.468; P = .006; OR 5.03, 95% CI 1.273-19.871; P = .013). The overall reoperation rate was 25.2%.

CONCLUSION

TMT arthrodesis of the medial and central column resulted in significant improvement in foot function and pain. A major complication was nonunion. Locking plate plus compression screw fixation was associated with a lower nonunion rate.

LEVEL OF EVIDENCE: Level III, comparative series.