Abstract: Objective: To compare the application of high-speed electric contra-angle handpiece and ultrasonic osteotome with contra-angle turbine handpiece in the extraction of maxillary medium-high mesial obstructive wisdom teeth. Methods: Forty cases of maxillary medium-high mesial obstructive wisdom teeth were randomly divided into 2 groups and extracted with high-speed electric contra-angle handpiece and ultrasonic osteotome with contra-angle turbine handpiece, respectively. The extraction time and postoperative swelling, pain, mouth opening restriction, and orofacial injury were compared between two groups. Results: The operative time of electric contra-angle handpiece group was shorter than that of ultrasonic osteotome with contra-angle turbine group, and the postoperative swelling, pain, and degree of mouth opening restriction had no significant difference between two groups. Conclusion: Electric contra-angle handpieces are efficient and have little postoperative reaction when extracting maxillary mid-high mesial obstructive wisdom teeth, which can be recommended clinically.

Key words: ultrasonic osteotome, contra-angle high speed electric surgical handpiece, maxillary mid-high mesial impacted wisdom teeth