Yu's flap for lower lip and reverse Yu's flap for upper lip reconstruction: 20 years experience.

Reconstruction of defects of the lip caused by cancer with its requirements of a complicated anatomical structure, important physiological function, and acceptable cosmetic result, is a challenge for oral and maxillofacial and plastic surgeons. A method that combines rotation and advancement flaps was described by Yu in 1989 for the reconstruction of defects of the lower lip. In our department between January 1992 and December 2012, 8 patients had reverse Yu flaps for the reconstruction of upper lip defects and 56 patients had classic Yu flaps for lower lip defects. Patients with defects located laterally to the upper lips, ranging from ⅓ to ½, had unilateral reverse Yu flaps, and bilateral procedures were done for defects of less than ⅔ of the lips. However, if the defects were located in the centre of the upper lips, between ⅓ and ½, they were treated with bilateral reverse Yu flaps. Patients with defects between ⅓ and ⅔ of lower lips had unilateral Yu flaps, and if the defects were wider than ⅔ of the lower lips, the procedure was bilateral. No flap failed and desirable functional and aesthetic outcomes were recorded in all cases. Here we report our experience with the Yu flap for the benefit of other surgeons.