Flexible Tunnel Technique for Severe Endo-Perio Lesions

A novel surgical protocol involving four vertical incisions and a stretching cut creates a flexible flap tunnel to access deep combined endodontic-periodontal defects at the root tip. Indicated for severe endo-perio lesions with extensive bone loss, the 2-year follow-up demonstrated predictable bone fill, attachment gain, and minimal flap tension. Applies to periodontics and endodontics.