Abstract: Objective To analyze the validity of multiple-functioned periodontal-surgical model used in the simulation-based preclinical practice training course of periodontology by comparing the new model with traditional model(pig jaw).Methods Sixty-four undergraduates of grade 2010-2013 (seven-year program) from the School of Stomatology of Zhejiang University were selected and divided into experimental group and control group.The two group use new model(multiple-functioned periodontal-surgical model) and traditional model(pig jaw) respectively,all combined with multi-media.Questionnaires were used to evaluate the effectiveness between the two groups after the course.Results Mastery of four kinds of periodontal incision between experimental group and control group,the difference had statistical significance.Internal beveled incision:grasped (31 vs 24);External beveled incision:grasped(31 vs 25);Interdental horizontal incision:grasped(32 vs 24);Crevicular incision:grasped(32 vs 24).The degree of satisfaction in practice training course of periodontology of the experimental group was 87.5%(28/32),which is higher than that the control one 65.6%(21/32)(P=0.04).Undergraduates were interested in practice training course of periodontology resulting from the addition surgical training part brought by the new model.Conclusions Multiple-functioned periodontal-surgical model,improving practice ability of students,has the potential of raising students' satisfaction and meet the multiple requirement of preclinical practice training course of periodontology.

Key words: Multiple-functioned periodontal-surgical model, Periodontology, Teaching reform