This document discusses various endodontic surgical procedures including abscess drainage, periapical surgery, hemisection, intentional replantation, and corrective surgery. It provides details on how to perform and the indications for periapical surgery, which involves surgical exposure of the root apex after root canal treatment, apicectomy, retrograde filling, and flap closure. The key steps of periapical surgery are outlined, including antibiotic prophylaxis, flap design, anesthesia, incision and reflection, periapical exposure, root-end resection, root-end preparation, root-end filling material, and suturing. Corrective procedures like bicuspidization, hemisection, and replantation are also