Postoperative Medial Cuneiform Position Correlation With Patient-Reported Outcomes Following Cotton Osteotomy for Reconstruction of the Stage II Adult-Acquired Flatfoot Deformity.Foot Ankle Int. 2019 May; 40(5):491-498.FA
Residual supination of the midfoot during reconstruction of the stage II adult-acquired flatfoot deformity (AAFD) is often addressed with a medial cuneiform (Cotton) osteotomy after adequate correction of the hindfoot valgus deformity. The purpose of this study was to determine if there was a correlation between postoperative alignment of the medial cuneiform and patient-reported outcomes.
Sixty-three feet in 61 patients with stage II AAFD who underwent a Cotton osteotomy as part of a flatfoot reconstruction were included in the study. Radiographic angles were measured on weightbearing lateral radiographs at a minimum of 40 weeks postoperatively. Pearson's correlation analysis was used to determine if there was an association between postoperative radiographic angles and Foot and Ankle Outcome Score (FAOS) at a minimum of 24 months postoperatively. Patients were also divided into mild plantarflexion (cuneiform articular angle [CAA] ≥-2 degrees) and moderate plantarflexion (CAA <-2 degrees) groups to evaluate for differences in clinical outcomes.
Postoperative CAA was significantly positively correlated with the postoperative FAOS symptoms (r = .27, P = .03), daily activities (r = .29, P = .02), sports activities (r = .26, P = .048), and quality of life (r = .28, P = .02) subscales. Patients in the mild plantarflexion group had statistically and clinically better outcomes compared with the moderate plantarflexion group in the FAOS symptoms (P = .04), daily activities (P = .04), and sports activities (P = .01) subscales.
Our study suggests that the surgeon should avoid excessive plantarflexion of the medial cuneiform and use the Cotton osteotomy judiciously as part of a flatfoot reconstruction for stage II AAFD.
LEVEL OF EVIDENCE
Level III, comparative series.