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Preliminary study on analysis method of spontaneous smile and application

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Author:
No author available
Journal Title:
Chinese Journal of Stomatology
Issue:
3
DOI:
10.3760/cma.j.issn.1002-0098.2012.03.010
Key Word:
微笑;美学,牙科;图像处理,计算机辅助;微笑类型;Smiling;Esthetics,dental;Image processing,computer-assisted;Smile type

Abstract: Objective To investigate the smile esthetic elements of Chinese Han-nationality female based on high definition (HD) digital camera with computer-image measuring technique.Methods HD digital camera was used to capture spontaneous smile process combined with computer-image measuring technique to establish the analysis method of smile.Ninety-nine Han-nationality female with normal gingiva,aged from 20 to 30 years were recruited.The lip-incisor edge distance,gingival display were measured.The data was statistically analyzed.Results A standard and objective method to analyze spontaneous smile was established.Forty-three percent(43/99) of the subjects studied were classified as having a high smile and average smile respectively,13% (13/99) as having a low smile. Gingival display accounted for (1.34 ±0.98) mm in high smile type.Conclusions Average smile and high smile type were most common in the Chinese Han-nationality female studied.

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