Principalization of the Anatomical Subunit Approximation Technique of Unilateral Cleft Lip Repair

Abstract

Background: The Anatomical Subunit Approximation cleft lip repair advantageously achieves a balanced lip contour with the line of repair placed along seams of aesthetic subunits. Since Fisher’s original description, it has been adopted widely and adapted, but some surgeons find the transition away from a cut-as-you-go approach challenging. Methods: We present an adapted Anatomic Subunit Approximation technique based on essential components of Fisher’s repair. The order of surgical execution is emphasized. Paradigm shifts are presented to help the surgeon used to more traditional rotation advancement techniques understand the Subunit philosophy. Minor adaptations such as surgically releasing lateral lip elements prior to marking are discussed. Results: A total of 53 eligible patients were treated with unilateral cleft lip repair by the senior author (D.C.) between February 2008 and April 2012 at Royal Children’s Hospital in Melbourne, Australia. Representative cases were chosen to demonstrate achievable results with the described technique. Conclusion: The proposed technique employs essential skin markings to achieve an anatomic subunit approximation lip repair, and appears to facilitate surgical outcomes with a high degree of symmetry. Core principles of repair include precise anatomical planning, tissue component separation, and muscle-driven advancement.