Tsutsumi H, Matsui N, Morita Y, Sano E, Okamura K, Komuro T, Takei T
Department of Legal Medicine, Nihon University School of Dentistry.
Nihon Hoigaku Zasshi. 1993 Dec;47(6):466-80.
Plaster models of the teeth of 3-year-old Japanese children (96 males, 98 females) were used to record the crown length, crown width and crown thickness of 5 maxillary and 5 mandibular deciduous teeth (30 measurement values). These measurements were used to devise a number of sex determination formulae. A sex-determination formula using all 30 values was calculated. Furthermore, a number of practical formulae were derived from only the crown width and crown thickness values because the deciduous teeth wear in 4 years and older children rapidly progress, making the crown length measurement unreliable. These formulae were calculated for the maxillary teeth alone and mandibular teeth alone. The formulae based on only the crown width or thickness were also calculated for both maxillary and the mandibular teeth. A step-wise discriminant analysis was then used to ascertain the most reliable measurements and a practical formula subsequently devised. The results obtained were as follows: 1. The mean value for each measurement was greater in males than in females. 2. Significant differences in the values recorded were seen in 28 out of the 30 measurements taken. The measurement items not exhibiting these significant differences were the crown width of the maxillary lateral incisor and the crown thickness of the mandibular second molar. 3. The accuracy rates for the sex-determination analysis and the step-wise sex determination analysis calculated using all 30 values were 78.6% and 75.7%, respectively. 4. The accuracy ranges for the modified sex-determination formulae and the associated step-wise sex determination analyses were 70.6-78.4% and 67.0-76.8%, respectively.
研究使用了3岁日本儿童（96名男性，98名女性）牙齿的石膏模型，记录了5颗上颌乳牙和5颗下颌乳牙的冠长、冠宽和冠厚（共30个测量值）。这些测量值被用于设计一些性别判定公式。计算了使用所有30个值的性别判定公式。此外，由于4岁及以上儿童的乳牙磨损进展迅速，使得冠长测量不可靠，因此仅从冠宽和冠厚值推导出了一些实用公式。这些公式分别针对上颌牙齿和下颌牙齿单独计算。还针对上颌和下颌牙齿分别计算了仅基于冠宽或冠厚的公式。然后使用逐步判别分析来确定最可靠的测量值，并随后设计出一个实用公式。得到的结果如下：1. 每项测量的平均值男性大于女性。2. 在30项测量中，有28项记录值存在显著差异。未表现出这些显著差异的测量项目是上颌侧切牙的冠宽和下颌第二磨牙的冠厚。3. 使用所有30个值计算的性别判定分析和逐步性别判定分析的准确率分别为78.6%和75.7%。4. 改良性别判定公式及相关逐步性别判定分析的准确率范围分别为70.6 - 78.4%和67.0 - 76.8%。
