IRCT20180515039664N2 IRCT 2020-05-11 Zahedan University of Medical Sciences Comparison and evaluation of post-surgical outcome of mandibular third molar surgery by conventional rotary device and piezoelectric surgery. Comparison and evaluation of pain, swelling and trismus of mandibular third molar surgery by conventional rotary device and piezoelectric surgery. 2019-05-22 anticipated 30 Complete https://irct.ir/trial/39585 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Flip a coin were used to randomize samples. N/A Impacted teeth. Intervention 1: Control group: Injection of two lidocaine cartridges with the main anesthesia technique involves the use of an alveolar inferior nerve block (IANB) and Long buccally nerve block, then a triangular Fullthickness flap in the second and third molar teeth with a buccally inclination, followed by surgical osteotomy in control group by NSK . Vmax surgical motor machine, made in Japan (35,000 rpm),to cool the surgical site during the operation, use 250 ml of sterile washing serum and then followed by tooth extraction and silent washing with 40 ml of sterile serum, followed by suturing with a non-absorbent Silk floss of 3-0 by Simple loop suture technique. Intervention 2: Intervention group: Injection of two lidocaine cartridges with the main anesthesia technique involves the use of an alveolar inferior nerve block (IANB) and Long buccally nerve block, then a triangular Fullthickness flap in the second and third molar teeth with a buccally inclination, followed by surgical osteotomy in test group by Dmetec SurguryStar plus piezo machine made in South Korea,to cool the surgical site during the operation, use 250 ml of sterile washing serum and then followed by tooth extraction and silent washing with 40 ml of sterile serum, followed by suturing with a non-absorbent Silk floss of 3-0 by Simple loop suture technique. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is No more information.