关键词: 埋伏多生牙, CBCT, 微创拔牙术

Abstract: Objective　To evaluate different clinical effects of the minimally invasive surgery techniques combined with CBCT examination and conventional technologies on the extraction of embedded supernumerary teeth. Methods Totally 28 patients with 52 embedded supernumerary teeth were selected from 2013 to 2016 and were randomly divided into the minimally invasive group and the conventional group. Respectively two different methods were used to examine and remove the embedded supernumerary teeth. Information of two groups of patients was recorded, including operative time, postoperative pain, postoperative swelling and postoperative complications. Result The operative time of the minimally invasive group（24.7±7.2）min was shorter than that of the conventional group（33.4±8.1）min；the rates of postoperative pain and postoperative swelling were lower than those of the conventional group，the differences being statistically significant（P<0.005）. The occurrence rates of postoperative complications (adjacent teeth damage，leakage of maxillary sinus or nasal cavity, dry socket and limitation of mouth opening) in the minimally invasive group were lower than those in the conventional group. Conclusion Minimally invasive techniques combined with CBCT examination used in the extraction of embedded supernumerary teeth can shorten the operation time，reduce the incidence of postoperative pain and postoperative swelling; meanwhile，it can reduce the occurrence of surgical compliance.

Key words: embedded supernumerary teeth, cone beam computed tomography, minimally invasive extraction