Liversidge Helen M
Department of Paediatric Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary, University of London, London E1 2AD, UK.
Ann Hum Biol. 2011 Nov;38(6):702-15. doi: 10.3109/03014460.2011.609565. Epub 2011 Aug 24.
The existence of ethnic differences in dental maturity is uncertain.
The aims were to assess the impact of ethnic group and sex on tooth formation and report two new dental age estimation methods.
The sample was radiographs of White and Bangladeshi dental patients in London, England (529 males, 521 females) of 2-22 years. Mandibular permanent teeth were staged after Moorrees et al. (1963, J Dent Res 42:1490). Average age entering tooth stages was calculated using logistic regression with ethnic group and sex as explanatory factors. Maturity data were adapted for age prediction (N25a) and mean age within stage (N25b) was calculated.
Mean ages between ethnic groups was not significantly different in 83 of 91 individual tooth stage comparisons in males and 77 of 91 comparisons in females. Variation within each group was greater than variation between groups. For the combined ethnic group comparison of males and females, results show that average age of most canine and premolar root stages in females was significantly earlier than males and third molar root formation was later in females compared to males (p < 0.05).
Dental maturity of permanent teeth was similar in these ethnic groups.
牙齿成熟度存在种族差异这一情况尚不确定。
旨在评估种族和性别对牙齿形成的影响，并报告两种新的牙齿年龄估计方法。
样本为英格兰伦敦2至22岁的白人和孟加拉裔牙科患者的X光片（男性529例，女性521例）。下颌恒牙按照穆里斯等人（1963年，《牙科研究杂志》42:1490）的方法进行分期。以种族和性别作为解释因素，采用逻辑回归计算进入牙齿分期的平均年龄。对成熟度数据进行调整以用于年龄预测，并计算各阶段内的平均年龄（N25b）。
在男性91个个体牙齿分期比较中的83个以及女性91个比较中的77个中，种族间的平均年龄无显著差异。每组内的差异大于组间差异。对于男性和女性合并种族组的比较，结果显示，女性大多数犬齿和前磨牙牙根阶段的平均年龄显著早于男性，且女性第三磨牙牙根形成比男性晚（p < 0.05）。
这些种族中恒牙的牙齿成熟度相似。
