Abstract: PURPOSE: To explore the application of three-dimensional reconstruction technique in clinical teaching of impacted tooth extraction. METHODS: Using the three-dimensional reconstruction software Mimics 20.0, the positional relationship between the mandibular third molar and the surrounding tissues, including the adjacent teeth, the inferior alveolar nerve canal and the surrounding jaw bone, were presented in three dimensions. Among the interns of Shanghai Jiao Tong University College of Stomatology, 40 students were randomly divided into two groups: the three-dimensional reconstruction study group and the traditional teaching group, 20 students in each group. The clinical teaching of impacted tooth extraction was performed separately, and the students were subjected to theoretical assessment, comprehensive practice assessment and questionnaire survey after completion of the teaching course. The data were analyzed with SPSS 23.0 software package. RESULTS: There was no significant difference in the theoretical assessment between the two groups of students, but the three-dimensional reconstruction teaching group was significantly better than the traditional teaching group in comprehensive ability assessment. Questionnaire survey showed that students in the 3D reconstruction teaching group were more satisfied with the learning results than the traditional teaching group. CONCLUSIONS: Clinical teaching through 3D reconstruction technology has deepened the students' understanding of the theoretical knowledge and local anatomy of impacted teeth, and has improved the students' interest in learning. Therefore, 3D reconstruction technology has broad application prospects in the clinical teaching of impacted tooth extraction, which can greatly improve the quality of clinical teaching.

Key words: Three-dimensional reconstruction technique, Impacted tooth extraction, Clinical teaching