Cleft Lip: Unilateral Primary Deformities

Learning Objectives: After studying this article, the participant should be able to: 1. Discuss advantages and disadvantages of the available classification systems for cleft lip deformities. 2. Discuss, in detail, the normal anatomic features of the orbicularis oris muscle and the aberrant features seen in unilateral cleft lip deformities. 3. Define the anatomic features of the unilateral cleft lip and cleft lip nose deformity. 4. Differentiate the advantages and disadvantages of the two commonly used techniques for unilateral cleft lip repair. The understanding and management of all aspects of unilateral cleft lip deformities continue to evolve. Just as we are entering the era of exciting advances in the understanding of the pathogenesis of craniofacial disorders, expansion of our understanding of the dynamic relationships of the structural and soft-tissue components of cleft deformities has assisted surgeons in achieving progressively improved and consistent outcomes for these patients. The anatomic and physiologic complexity of unilateral cleft lip deformities has been recognized for centuries, and generations of researchers have cumulatively contributed to our current understanding. This article examines the history, classification, anatomy, and controversies in the surgical management of unilateral cleft lip deformities, allowing surgeons to formulate a reasoned, longitudinal management plan for their patients on the basis of the available current data.