Department of Prosthodontics, School of Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil.
J Prosthet Dent. 2011 Aug;106(2):95-101. doi: 10.1016/S0022-3913(11)60102-9.
Female teeth are considered more rounded and male teeth more quadrangular. Although lacking in scientific support, this theory helps in selecting the mold of artificial teeth for dentures. Parameters that are more reliable are sought to determine gender differences in tooth form.
The purpose of this study was to assess possible differences between genders in terms of tooth form: oval, triangular, or quadrangular.
The sample comprised 433 subjects with a mean age of 15 years selected from a population of Brazilian high school students. The maxillary right central incisor (MCI) of each subject was photographed. The images were adjusted to standardize the long axis of the tooth in the vertical position. The AutoCAD computer program was used to analyze graphically the geometric form of the tooth. According to analysis results, form was classified as oval, triangular, or quadrangular. Intraexaminer consistency was analyzed by using linear correlation coefficient and Bland Altman analysis. The relationship between gender and tooth form was analyzed by chi-square and linear regression (α=.05).
In women, the form was 57.73% (n=127) oval, 23.54% (n=52) triangular, and 18.64% (n=41) quadrangular; while in men, the form was 54.93% (n=117) oval, 36.15% (n=77) triangular, and 8.92% (n=19) quadrangular (P<.001).
The oval form was the most prevalent in both genders. However, the triangular form was more common in men than in women, and the quadrangular form more frequent in women than in men.
女性的牙齿被认为更圆润，而男性的牙齿更方。尽管缺乏科学依据，但这一理论有助于选择义齿人工牙的模具。人们寻求更可靠的参数来确定牙齿形状的性别差异。
本研究旨在评估性别在牙齿形状方面的差异：椭圆形、三角形或方形。
从巴西高中生人群中选择了 433 名平均年龄为 15 岁的受试者作为样本。拍摄每位受试者上颌右中切牙（MCI）的照片。图像被调整为标准的牙长轴垂直位置。使用 AutoCAD 计算机程序对牙的几何形状进行图形分析。根据分析结果，将形态分为椭圆形、三角形或方形。使用线性相关系数和 Bland Altman 分析评估内部检验员的一致性。通过卡方检验和线性回归（α=.05）分析性别与牙齿形态的关系。
在女性中，形态为椭圆形的占 57.73%（n=127），三角形的占 23.54%（n=52），方形的占 18.64%（n=41）；而在男性中，形态为椭圆形的占 54.93%（n=117），三角形的占 36.15%（n=77），方形的占 8.92%（n=19）（P<.001）。
在两性中，椭圆形形态最为常见。然而，三角形形态在男性中比女性更为常见，而方形形态在女性中比男性更为常见。
