Oziegbe Elizabeth O, Esan Temitope A, Oyedele Titus A
Department of Child Dental Health, Faculty of Dentistry, Obafemi Awolowo University, Ile-Ife, Osun State, 220005, Nigeria.
Am J Phys Anthropol. 2014 Mar;153(3):506-11. doi: 10.1002/ajpa.22447. Epub 2013 Dec 9.
This study measured the mean age, duration, and sequence of the emergence of permanent dentition in Nigerian children and compared the findings with other population groups. The cross-sectional study involved 1,078 Nigerian children, aged 4-16 years old, from selected primary and secondary schools in the Ife Central local government area in Ile-Ife, Osun State. In general, compared to boys, girls had an earlier mean age of emergence of all the permanent teeth. Children from high socioeconomic class had an earlier mean age of emergence for the maxillary incisors (6.43 and 7.58 years) and mandibular incisors (5.28 and 6.44 years) compared to children from middle and low socioeconomic classes, although socioeconomic effects were more mixed for premolars and molars. Compared to their counterparts in the USA, Australia, Belgium, and Iran, Nigerian children showed an earlier mean age of emergence of all the permanent teeth studied except for Pakistani boys, who had an earlier mean age of emergence of the maxillary premolars and second molar. Poorer economic status has been associated with delayed dental development; however, when compared to other populations, the Nigerian children in this study have earlier mean emergence ages than children from wealthier countries such as the USA and Australia.
本研究测量了尼日利亚儿童恒牙萌出的平均年龄、持续时间和顺序，并将研究结果与其他人群进行了比较。这项横断面研究涉及来自奥孙州伊莱-伊费市伊费中部地方政府辖区选定中小学的1078名4至16岁的尼日利亚儿童。总体而言，与男孩相比，女孩所有恒牙的平均萌出年龄更早。与中低社会经济阶层的儿童相比，高社会经济阶层的儿童上颌切牙（6.43岁和7.58岁）和下颌切牙（5.28岁和6.44岁）的平均萌出年龄更早，不过前磨牙和磨牙的社会经济影响更为复杂。与美国、澳大利亚、比利时和伊朗的儿童相比，尼日利亚儿童除了巴基斯坦男孩上颌前磨牙和第二磨牙的平均萌出年龄更早外，所有研究的恒牙平均萌出年龄都更早。经济状况较差与牙齿发育延迟有关；然而，与其他人群相比，本研究中的尼日利亚儿童比美国和澳大利亚等较富裕国家的儿童平均萌出年龄更早。
