Reconstruction of Full-Thickness Lateral Defect of the Lower Lip and Vermilion with our Modification of a Fan Flap — Technique and Results

Abstract

Successfully restoring lateral lip defects, while ensuring proper mouth opening, oral competence, and the creation of an aesthetically pleasing vermilion, has consistently posed a challenging undertaking. In a prospective study conducted from 2006 to 2022, we employed our modified version of the McGregor fan flap technique to reconstruct post-oncosurgical pure lateral lower lip and complete lower lip defects. The study excluded cases involving a central lip defect or accompanying buccal mucosa involvement. A total of 126 flap procedures were performed on 122 patients, encompassing lower lip defects ranging from 30 to 100% in size. Unilateral flaps were performed on 118 patients, while four patients necessitated bilateral flap procedures. The reconstruction of the vermilion was accomplished using our modified flap technique in 114 patients, tongue flaps in two patients, and six patients, the flap’s skin was folded to mimic the vermilion. Remarkably, no complications such as hematoma, necrosis, flap loss, infection, microstomia, or dribbling were encountered. The labial sulcus was found to be adequately formed. All patients achieved preoperative mouth opening within 3 months following surgery, with a mean oral sphincteric recovery time of 4.2 months. The color match of the reconstructed vermilion was excellent. Our modified fan flap technique stands as a dependable and robust choice for addressing moderate to large full-thickness lateral defects of the lower lip offering effective vermillion reconstruction in a single surgical procedure. The cases involving associated buccal mucosa or submucous fibrosis may necessitate alternative vermilion reconstruction approaches.