Fig. 1

The surgical procedure of double-opposing Z-plasty on porcine tongue; (A & B) The porcine tongue is fixated on the holder with being cut in the middle part. (C) To simulate the Nasal and oral layers separation. (D) To simulate the Z-plasty flaps, Preparation of two myomucosal flaps and two mucosal flaps. (E) Suturing of Nasal Z-plasty flap. (F) Suturing of Oral Z-plasty flap