First Metatarsophalangeal Arthrodesis Outcomes of Hallux Rigidus vs Hallux Valgus

Category: Midfoot/Forefoot; Other Introduction/Purpose: First metatarsophalangeal (MTP) joint arthrodesis is a commonly performed surgical procedure for patients with hallux rigidus (HR) or severe hallux valgus (HV). The purpose of this study was to compare patient outcomes of 1st MTP arthrodesis between HR and HV cohorts. We hypothesized that there would be no difference in patient-reported outcome measures (PROMs) or complication rates between groups. Methods: A retrospective review was conducted at a single academic medical center of patients who underwent 1st MTP arthrodesis with one of two fellowship-trained foot and ankle orthopaedic surgeons between 2009 and 2021. A total of 136 patients (148 feet: HR=75, HV=47, both=44) met the inclusion criteria of the three-month follow-up minimum. Data collection included PROMs (i.e., Visual Analogue Scale [VAS], 12-item Short Form Survey [SF-12], Foot and Ankle Outcome Score [FAOS], and Foot and Ankle Ability Measure [FAAM], Patient-Reported Outcomes Measurement Information System [PROMIS]), radiographic markers, and complication and reoperation rates. The VAS, SF-12, FAOS, and FAAM were collected preoperatively; the FAOS and FAAM were collected postoperatively; and all were collected via prospective phone interview. Forty-six patients (50 feet: HR=21, HV=15, both=14) completed the phone interview at an average of 3.04 (range, 0.58-10.01) years postoperatively. Mean clinical follow-up was 1.25 (range, 0.25-6.14) years. Results: The HR had a significantly smaller improvement in HVA (HR=-3.60, HV=-17.44, combined=-15.27; p