Inferior Sclera Exposure and Maxillary Sagittal Position: Is there any Relationship?

S. Buyuk, F. Ayrancı, Esra Genc, Tugce Imamoglu
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Abstract

Background: Maxillofacial hard and soft tissues play an essential role in the formation of facial aesthetics. The aim of this study was to determine the relationship between inferior scleral exposure and maxillary sagittal position. Methods: The present study was performed on the lateral cephalometric radiographs and frontal facial photographs of 110 adolescent subjects. The participants were divided into two equal groups according to gender (55 subjects per group). Total eye height and inferior scleral heights were defined, and scleral exposure ratios were calculated on facial photographs. The measurements were performed for right and left eyes, and the mean value for inferior scleral exposure ratio was calculated. Soft and hard tissue measurements of maxilla were performed on lateral cephalometric radiographs. Independent t test, Mann-Whitney U test, and Pearson correlation test were used to analyze the data. Results: There was no statistical difference between genders in the inferior scleral exposure ratio, NPerp_A, A’_True Vertical Line (TVL), and Upper Lip_TVL parameters (P>0.05). However, maxillary height was greater in male subjects than females (P 0.05). The inferior scleral exposure ratio was significantly correlated with maxillary height in females (r=-0.296; P 0.05). Conclusions: While the inferior scleral exposure ratio was correlated with NPerp_A distance in male adolescents, the inferior scleral exposure ratio was correlated with maxillary height in female adolescents.
下巩膜暴露与上颌矢状位有关系吗?
背景:颌面部硬软组织在面部美学的形成中起着至关重要的作用。本研究的目的是确定下巩膜暴露与上颌矢状位之间的关系。方法:对110名青少年的侧位头颅x线片和正面面部照片进行研究。参与者按性别分为两组(每组55人)。定义眼总高度和下巩膜高度,并根据面部照片计算巩膜曝光率。测量右眼和左眼,计算下巩膜暴露比的平均值。在侧位头颅x线片上进行上颌骨软硬组织测量。采用独立t检验、Mann-Whitney U检验和Pearson相关检验对数据进行分析。结果:下巩膜暴露比、NPerp_A、A′_True Vertical Line (TVL)、Upper Lip_TVL参数性别差异无统计学意义(P>0.05)。上颌高度男性高于女性(p0.05)。女性下巩膜暴露率与上颌高度显著相关(r=-0.296;P 0.05)。结论:男性青少年下巩膜暴露率与NPerp_A距离相关,女性青少年下巩膜暴露率与上颌高度相关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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