Abstract: PURPOSE: To compare the effects of piezosurgery and high-speed turbine handpiece in the extraction of middle and high impacted mandibular third molars, and to explore the best method for reducing postoperative reactions and complications of impacted mandibular third molar extraction. METHODS: A randomized, self-controlled study was conducted, and 32 eligible patients were included as the research objects. One side of the affected teeth was extracted with high-speed turbine handpiece (turbine handpiece group), while the other side of the affected teeth was extracted with piezosurgery (piezosurgery group). The operation time, degree of postoperative pain, degree of limitation of mouth opening, percentage of swelling of the affected side, and incidence of postoperative complications were compared between the two groups. SPSS 26.0 software package was used to analyze the data. RESULTS: Compared with piezosurgery group, the turbine handpiece group had shorter operation time, lower pain scores on the 5th to 7th day after operation, and less limitation of mouth opening on the 2nd to 7th day after operation, the differences were statistically significant (P<0.05). However, There was no significant difference between the two groups in facial swelling, pain at 1-4 days after operation and complications(P>0.05). CONCLUSIONS: High-speed turbine handpiece extraction takes less time, less postoperative pain, recovered more quickly, and less mouth opening limitation, while piezosurgery method has certain advantages in reducing postoperative swelling.

Key words: High-speed turbine, Piezosurgery, Mandibular impacted third molar, Post-extraction complications