关键词: 高速涡轮钻法, 劈冠法, 阻生牙, 拔牙术

Abstract:

Objective To compare the effects of high-speed air-turbine drill and traditional chisel technique in removal of impacted mandibular third molars， and to evaluate the superiority of the high-speed air-turbine drill. Methods A total of 140 impacted mandibular third molars to be extracted were randomly assigned to two treatment groups：one group （test group） received high-speed air-turbine drill， while the other （control group） received traditional chisel technique. Then both the duration of the extraction and complications （aches， swelling，opening of mouth）were observed and compared. Results The data showed that duration of extraction of the test group was shorter than the control group （P < 0.01）. The occurence of postoperational complications had statistical differences berween the two groups （P < 0.01），the test group being apparently fewer than the control group. Conclusion Compared with traditional chisel technique， high speed air turbine drill can efficiently cut down duration of extraction with minor wound， reduce the incidence of postoperational reaction and diminish the fear of patients to operation，therefore it is recommendable in clinical practice.

Key words: high-speed air-turbine drill, traditional chisel technique, impacted third molars, exodontia