Abstract: PURPOSE: To explore the application of CBL teaching method combined with "Internet+medical popular science" teaching mode on the undergraduate teaching of oral and maxillofacial surgery. METHOD: Sixty students from grade 2020 undergraduate class of Inner Mongolia Medical University were randomly divided into three groups, A, B and C, with 20 students in each group. Some courses of "oral and maxillofacial surgery" were selected for different teaching models. Among them, group A adopted traditional teaching model, group B adopted the CBL teaching method combined with traditional teaching model, and group C adopted CBL teaching method combined with traditional teaching model. At the same time, they participated in the writing of popular science articles and the production of popular science videos. After the teaching course was completed, the teaching effects of the three groups of students were compared: theoretical assessment score, practical assessment score and questionnaire survey evaluation. RESULTS: The theoretical and practical assessment scores of both group B and group C were superior to those of group A. Meanwhile, group C had further improvement on the basis of group B(P<0.05). The questionnaire survey indicated that group B had significant improvements in teaching quality, basic clinical skills and personal assessment, while group C had significant improvements in the clarity, independence and workload of professional goals. CONCLUSIONS: CBL teaching method combined with "Internet+medical popular science" teaching model is conducive to enhancing the basic knowledge mastery ability and clinical practice operation ability of undergraduate students majoring in stomatology. At the same time, it can increase students' learning interest, clinical thinking ability and social responsibility, and lay a solid foundation for their future clinical diagnosis and treatment work.

Key words: CBL teaching method, Internet plus, Medical science popularization, Oral and Maxillofacial surgery, Teaching evaluation