de Castro Marcos Vinícius Moreita, Santos Nádia Carolina de Menesses, Ricardo Lucilene Hernandes
Dental School, Taubaté University (UNITAU), Goiãnia, Goiás, Brazil.
Quintessence Int. 2006 Sep;37(8):597-604.
The aim of this study was to determine the prevalence of the "golden proportion" in individuals presenting agreeable smiles.
Two hundred sixty university students aged 18 to 30 years of age (130 subjects of each gender) with maxillary incisors, canines, and premolars presenting anatomic integrity were evaluated. Agreeable smiles were considered to be those displaying at least second premolars; revealing no gingival recession in the smile area; having interdental papillae that filled all interdental spaces and were not hyperplastic; showing less than 3 mm of the maxillary gingiva; displaying the line of the lower lip parallel to the incisal line of the maxillary teeth and also to an imaginary line linking the contact points of these teeth; and, finally, presenting symmetry upon examination. Twenty-one individuals of this sample who presented this kind of smile (11 female and 10 male subjects) had their maxillary incisors, canines, and premolars of the same hemiarch measured in the cervicoincisal and mesiodistal directions using a periodontal probe, a digital Boley gauge, and digitalized analysis. Data were submitted to statistical analysis for comparison of adjacent teeth considering 1.618 (golden proportion) as a reference, with a statistical significance of P < .05.
Of the agreeable smiles evaluated, 7.1% exhibited the golden proportion.
The golden proportion was not often found in adjacent teeth shown in smiles in the sample studied.
本研究旨在确定呈现宜人微笑的个体中“黄金比例”的发生率。
对260名年龄在18至30岁之间的大学生（男女各130名）进行评估，这些学生的上颌切牙、尖牙和前磨牙解剖结构完整。宜人微笑被定义为至少露出第二前磨牙；微笑区域无牙龈退缩；牙间乳头充满所有牙间隙且无增生；上颌牙龈露出少于3毫米；下唇线与上颌牙齿切缘线平行，且与连接这些牙齿接触点的假想线平行；最后，检查时呈现对称性。从该样本中选取21名呈现这种微笑的个体（11名女性和10名男性受试者），使用牙周探针、数字式博利测径器和数字化分析，在近远中方向和颈切方向测量同一半侧牙弓的上颌切牙、尖牙和前磨牙。将数据进行统计分析，以1.618（黄金比例）作为参考比较相邻牙齿，统计学显著性为P < 0.05。
在评估的宜人微笑中，7.1%呈现黄金比例。
在所研究的样本中，微笑时相邻牙齿中不常出现黄金比例。
