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AbstractBackground: Reduction in postoperative complications is of vital considerations in impacted third molar teethsurgery. The aim of this study was to compare postoperative complications of impacted third molar surgeriesfor bone removal using laser, piezoelectric equipment, and conventional rotary instruments. Methods: To address the research purpose, the investigator designed the prospective double-blind clinical trial study. The sample size was determined 20 (40 teeth) by sampling formula in any kind of operation. The data of patients wereobtained in the different periods in terms of pain, trismus, swelling, ecchymosis, and patient’s satisfaction and thenanalyzed using SPSS 20 software via paired t test and Wilcoxon and McNemar’s tests. Results: The pain immediately after surgery and 2 days and 7 days after surgery was higher in the laser group. The swelling immediately after surgery was more in the laser group but not significant. The amount ofmouth opening immediately after surgery and 2 days and 7 days after surgery was significantly lower in thelaser group than in the piezosurgery group. The total duration of surgery and duration of osteotomy weresignificantly longer in the laser group. The patient’s satisfaction from surgery with piezosurgery was morethan that with laser, but this difference was not significant. Conclusion: Due to the rising demand for impacted wisdom tooth surgery, the present study suggests that hardtissue laser surgery and piezosurgery can clear the future of impacted molar surgery, and these approaches are moreefficient in reducing postoperative complications compared to the conventional surgeries.

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