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首页> 外文期刊>The Journal of Prosthetic Dentistry >The relationship of facial anatomic landmarks with midlines of the face and mouth.
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The relationship of facial anatomic landmarks with midlines of the face and mouth.

机译：面部解剖标志与面部和嘴中线的关系。

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STATEMENT OF PROBLEM: The importance of the midline is well known to dentists. Currently, there are no verifiable guidelines that direct the choice of specific anatomic landmarks to determine the midline of the face or midline of the mouth. PURPOSE: The purpose of this study was to determine the hierarchy of facial anatomic landmarks closest to the midline of the face as well as midline of the mouth. MATERIAL AND METHODS: Three commonly used anatomic landmarks, nasion, tip of the nose, and tip of the philtrum, were marked clinically on 249 subjects (age range: 21-45 years). Frontal full-face digital images of the subjects in smile were then made under standardized conditions. A total of 107 subjects met the inclusion criteria. Upon applying exclusion criteria, images of 87 subjects were used for midline analysis using a novel concept called the Esthetic Frame. Deviations from the midlines of the face and mouth were measured for the 3 clinical landmarks; the existing dental midline was considered as the fourth landmark. The entire process of midline analysis was done by a single observer and repeated twice. Reliability analysis and 1-sample t tests were conducted at alpha values of .001 and .05, respectively. RESULTS: The results indicated that each of the 4 landmarks deviated uniquely and significantly (P<.001) from the midlines of the face as well as the mouth. CONCLUSIONS: Within the limitations of the study, the hierarchy of anatomic landmarks closest to the midline of the face in smile was as follows: the midline of the oral commissures, natural dental midline, tip of philtrum, nasion, and tip of the nose. The hierarchy of anatomic landmarks closest to the midline of the oral commissures was: natural dental midline, tip of philtrum, tip of the nose, and nasion. These relationships were the same for both genders and all ethnicities classified.
机译：问题陈述：中线的重要性已为牙医所熟知。当前，没有可验证的指南来指导特定解剖学界标的选择，以确定面部的中线或嘴巴的中线。目的：本研究的目的是确定最接近面部中线和嘴中线的面部解剖界标的层次。材料与方法：在249位受试者（年龄范围：21-45岁）上临床标记了三种常用的解剖学标志：鼻根，鼻尖和腓骨尖。然后在标准化条件下拍摄微笑的受试者的正面全脸数字图像。共有107名受试者符合入选标准。应用排除标准后，使用称为“审美框架”的新概念将87位受试者的图像用于中线分析。测量了3个临床标志物与面部和口腔中线的偏差;现有的牙科中线被认为是第四个里程碑。中线分析的整个过程由一名观察员完成，并重复两次。分别在.001和.05的alpha值下进行了可靠性分析和1-样本t检验。结果：结果表明，这四个界标中的每一个都从面部和嘴中线独特且显着偏离（P <.001）。结论：在本研究的范围内，最接近笑脸的中线的解剖标志的层次结构如下：口腔合缝的中线，自然的牙齿中线，phil尖，鼻根和鼻尖。最接近口腔连合中线的解剖标志的层次是：天然牙齿中线、,尖，鼻尖和鼻孔。这些关系对于性别和所有分类的种族都是相同的。

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