Sharma Payal, Singh Tushita, Kumar Piush, Chandra Pavan Kumar, Sharma Rakesh
Department of Orthodontics, I.T.S. Dental College, Muradnagar, Uttar Pradesh, India.
J Orthod Sci. 2013 Apr;2(2):55-60. doi: 10.4103/2278-0203.115090.
To assess the sex discrimination potential of permanent maxillary molar crown widths and cusp diameters.
Measurements were made on plaster casts of 200 individuals of known sex (100 males, 100 females, aged 12-21 years). Eight parameters were measured on the first and second maxillary molars with a digital caliper [buccolingual, mesiodistal, mesiobuccal-distolingual and distobuccal-mesiolingual crown widths and cusp diameters (hypocone, protocone, paracone, and metacone)]. The percentage of sexual dimorphism for each parameter was calculated. Discriminant function analysis was used to determine the accuracy of sex determination for each molar separately and both the molars taken together.
The highest sexual dimorphism was shown by protocone in the first molar and hypocone in the second molar. Furthermore, the sex determination accuracy was highest when the first molar was taken alone than when the second molar or the first and second molars were taken together.
Based on this study, odontometric measurements of maxillary molars provide low to moderate sex determination accuracy.
评估上颌恒磨牙牙冠宽度和牙尖直径的性别歧视可能性。
对200名已知性别的个体（100名男性，100名女性，年龄12 - 21岁）的石膏模型进行测量。使用数字卡尺对上颌第一和第二磨牙测量八个参数[颊舌径、近远中径、近中颊-远中舌和远中颊-近中舌牙冠宽度及牙尖直径（远中尖、原尖、副尖和近中尖）]。计算每个参数的性别二态性百分比。采用判别函数分析分别确定每颗磨牙以及两颗磨牙一起时性别的判定准确性。
第一磨牙的原尖和第二磨牙的远中尖显示出最高的性别二态性。此外，单独使用第一磨牙时性别的判定准确性高于使用第二磨牙或第一和第二磨牙一起时。
基于本研究，上颌磨牙的牙量测量提供的性别判定准确性低至中等。
