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学科主题: 口腔医学
题名:
Analysis of dynamic smile and upper lip curvature in young Chinese
作者: Liang, Ling-Zhi1; Hu, Wen-Jie1; Zhang, Yan-Ling1; Chung, Kwok-Hung2
关键词: Chinese Han nationality ; image processing ; smiles ; upper lip curvature
刊名: INTERNATIONAL JOURNAL OF ORAL SCIENCE
发表日期: 2013-03-01
DOI: 10.1038/ijos.2013.17
卷: 5, 期:1, 页:49-53
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Dentistry, Oral Surgery & Medicine
研究领域[WOS]: Dentistry, Oral Surgery & Medicine
关键词[WOS]: BUCCAL CORRIDOR SPACE ; FACIAL APPEARANCE ; PART 1 ; PARAMETERS ; AESTHETICS ; PARALYSIS ; POSITION ; ANATOMY ; ADULTS ; ARC
英文摘要:

During smile evaluation and anterior esthetic construction, the anatomic and racial variations should be considered in order to achieve better matching results. The aims of this study were to validate an objective method for recording spontaneous smile process and to categorize the smile and upper lip curvature of Chinese Han-nationality youth. One hundred and eighty-eight Chinese Han-nationality youths (88 males and 100 females) ranged from 20 to 35 years of age were selected. Spontaneous smiles were elicited by watching comical movies and the dynamics of the spontaneous smile were captured continuously with a digital video camera. All subjects′ smiles were categorized into three types: commissure, cuspid and gummy smile based on video editing software and final images. Subjects′ upper lip curvatures were also measured and divided into three groups: upward, straight and downward. Reliability analysis was conducted to obtain intra-rater reliabilities on twice measurements. The Pearson Chi-square test was used to compare differences for each parameters (alpha=0.05). In smile classification, 60.6% commissure smile, 33.5% cuspid smile and 5.9% gummy smile were obtained. In upper lip measurement, 26.1% upward, 39.9% straight and 34.0% downward upper lip curvature were determined. The commissure smile group showed statistically significant higher percentage of straight (46.5%) and upward (40.4%) in upper lip curvatures (P<0.05), while cuspid smile group (65.1%) and gummy smile group (72.7%) showed statistically significant higher frequency in downward upper lip curvature (P<0.05). It is evident that differences in upper lip curvature and smile classification exist based on race, when comparing Chinese subjects with those of Caucasian descent, and gender. International Journal of Oral Science (2013) 5, 49-53; doi:10.1038/ijos.2013.17; published online 5 April 2013

语种: 英语
WOS记录号: WOS:000318206400009
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/67917
Appears in Collections:北京大学口腔医学院_牙周科_期刊论文

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作者单位: 1.Peking Univ, Sch & Hosp Stomatol, Dept Periodontol, Beijing 100081, Peoples R China
2.Univ Washington, Dept Restorat Dent, Seattle, WA 98195 USA

Recommended Citation:
Liang, Ling-Zhi,Hu, Wen-Jie,Zhang, Yan-Ling,et al. Analysis of dynamic smile and upper lip curvature in young Chinese[J]. INTERNATIONAL JOURNAL OF ORAL SCIENCE,2013,5(1):49-53.
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