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To evaluate the effectiveness of Vectra 3D facial imaging technology in enhancing orthodontic teaching and training efficiency. Thirty-two dental students, enrolled in 2014 as five-year and eight-year curriculum in School of Somatology, Air Force Military Medical University were selected as the subjects of this research. As an important teaching facility for training the students to practice orthodontic clinical examinations, 2D and 3D facial imaging systems were selected in this study for the students to collect and analyze the data relat