Early Weightbearing After Arthrodesis of the First Metatarsal-Medial Cuneiform Joint: A Systematic Review of the Incidence of Nonunion.

Arthrodesis of the first metatarsal-medial cuneiform articulation is a reliable and effective surgery for correction of hallux abducto valgus deformity. However, one potential relative contraindication to the procedure is the extended period of non-weightbearing immobilization that is typically associated with the postoperative course. The objective of this investigation was to perform a systematic review of the incidence of nonunion after early weightbearing in patients who underwent arthrodesis of the first metatarsal-medial cuneiform articulation for correction of a hallux abducto valgus deformity. We performed a review of electronic databases with the inclusion criteria of retrospective case series, retrospective clinical cohort analyses, and prospective clinical trials with 15 or more participants; a mean follow-up period ≥12 months; a postoperative early weightbearing protocol (defined as ≤2 weeks); a clear description of the fixation construct; and a reported incidence rate of nonunion. Eight studies met our inclusion criteria, with a total of 443 arthrodeses analyzed. Of these, 16 (3.61%) were described as developing a nonunion. This would likely be considered an acceptable rate of nonunion when considering this procedure and might indicate that the Lapidus procedure does not always require an extended period of postoperative non-weightbearing immobilization.