[Esthetic evaluation of frontal smile on different crown heights of lateral incisor and canine].

To investigate the effect of different crown heights of lateral incisor and canine on smile esthetics perception between orthodontists and patients. Methods: A total of 31 orthodontists and 56 patients on smile aesthetics perception were investigated. We adjusted the height of lateral incisor and canine to get 20 kinds of anterior tooth area morphology by Photoshop and asked interviewees to grade. Scores of satisfaction were recorded by Likert method. Results: Subjects in the 2 groups preferred smiles with upper anterior teeth edge parallel to lower lip. There was better acceptance for longer canines and less satisfaction at shorter lateral incisors in patients. Patients also got higher discrete degree of evaluation results and more rigorous about smile esthetics than orthodontists.
 Conclusion: Orthodontists and patients have different satisfaction at esthetics of anterior teeth. Esthetics preference should be considered in orthodontic treatment schedule.