Evaluation of Upper Anterior Teeth Retraction Rate Assisted by Two Corticotomy Techniques

A full-thickness mucoperiosteal flap will be elevated including the interdental papilla, and extended from the distal side of the second premolar on the right side to the same position on the left side without performing any vertical releasing incisions. Then, one vertical incision between the roots of upper anterior teeth and two vertical incisions in the site of first premolar extraction will be made by the piezosurgery knife.

Vertical soft-tissue incisions will be made on the buccal and palatal gingiva by using a blade N.15. One incision will be made between the roots of the six upper anterior teeth, and two incisions will be made between the upper canines and the second premolars.