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Updated: Nov 6, 2025
Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
Published on: March 1, 2015
Upper Lip Anatomy, Mechanics of Local Flaps, and Considerations for Reconstruction
Alexis L Boson1, Stefanos Boukovalas1, Joshua P Hays1
1Drs. Boson, Cole, and Wagner are from The University of Texas Medical Branch, Galveston. Drs. Boson and Cole are from the Division of Plastic Surgery, Department of Surgery, and Dr. Wagner is from the Department of Dermatology. Dr. Boukovalas is from the Division of Plastic and Reconstructive Surgery, Department of Surgery, The University of Tennessee Graduate School of Medicine, Knoxville. Dr. Hays is from the Department of Emergency Medicine, Baylor College of Medicine, Houston, Texas. Dr. Hammel is from Dermatology Specialists, Atlanta, Georgia.
Abstract:
Reconstruction of defects involving the upper lip can be challenging. The purpose of this review was to analyze the anatomy and function of the upper lip and provide an approach for reconstruction of upper lip defects. The primary role of the upper lip is coverage of dentition and animation, whereas the lower lip is critical for oral competence, speech, and eating. The orbicularis oris (OO) and several other muscles contribute to upper lip function. There are various insertion points for animation muscles, including the upper lip dermis, OO, and modiolus. Special attention should be paid to the philtrum, Cupid's bow, and vermilion border during reconstruction. Advantages and disadvantages of the Abbe, Estlander, and Karapandzic flaps are presented. Knowledge of mechanics, indications, and properties of local flaps while considering unique characteristics of upper lip anatomy and function are crucial for optimal aesthetic and functional outcomes.
