Radiographic and Clinical Outcomes of Hallux Valgus and Metatarsus Adductus Treated With a Modified Lapidus Procedure

Abstract

Background: Previous studies have found an increased rate of deformity recurrence in hallux valgus (HV) patients with concomitant metatarsus adductus (MA) undergoing metatarsal osteotomies. The purpose of this paper was to determine if there were radiographic or clinical outcome differences between HV patients with and without MA undergoing a modified Lapidus procedure. Methods: One hundred forty-seven feet that underwent a modified Lapidus procedure for HV were divided into 2 groups based on their preoperative modified Sgarlato’s angle: (1) the MA group had an angle ≥20 degrees and (2) the HV-only group had an angle <20 degrees. HV angle (HVA) and intermetatarsal angle (IMA) were measured on preoperative and ≥5-month postoperative weightbearing radiographs. Patient-Reported Outcome Measurement Information System (PROMIS) physical function (PF) and pain interference (PI) scores were obtained preoperatively and postoperatively. Results: Patients in the MA group had a significantly higher mean postoperative HVA (10.8 vs 7.5 degrees; P = .038). There was a trend toward higher PROMIS PI scores in the MA group at 1 year postoperatively (51.9 vs 47.6; P = .088). Patients in the MA group were more likely to have a revision surgery (7.3% vs 0%; P = .021), and there was a trend toward those patients having a higher recurrence rate (17.1% vs 6.6%; P = .064). Conclusion: Despite potentially worse postoperative outcomes in patients with HV and MA who undergo a modified Lapidus procedure, the recurrence rates reported here are lower than those reported in the literature for patients with MA undergoing metatarsal osteotomies, indicating that a modified Lapidus procedure may be an acceptable choice in these patients. Level of Evidence: Level III, retrospective comparative series.