Abstract: Objective: To explore a more convenient, safe, and effective tooth extraction method. Methods: 40 patients (44 supernumerary teeth) with embedded supernumerary supraversion teeth in the maxillary central incisor area of our department from January 2015 to September 2018 were selected. The cone-beam CT examination was conducted before operation. According to the pre-operative images, the subjects were divided into 4 groups. In the experimental group, the extraction was performed by using the turbine antihorn handpiece through the nasal floor approach, while in the control group, the extraction was through the labial approach and palatal approach. The intraoperative blood loss and operation time were recorded. The postoperative pain was quantified by visual analogue scale. Results: The extraction time of experimental group A was shorter than that of the control group A (P<0.05). The intraoperative blood loss in experimental group A was less than that in control group A (P<0.05). The pain in experimental group A was lower than that in control group A (P<0.05). The extraction time of experimental group B was shorter than that of the control group B (P<0.05). The intraoperative blood loss in experimental group B was less than that in control group B (P<0.05). In terms of postoperative pain, there was no statistical difference between experimental group B and control group B. Conclusion: Extraction of embedded supernumerary supraversion teeth in maxillary central incisor area by nasal approach not only reduced operation time and bleeding amount, but also reduced the postoperative response and complications.

Key words: supernumerary teeth , minimally invasive extraction tooth, nasal floor approach, cone beam computed tomography