Department of Basic Dental Science, National Research Centre, Cairo, Egypt.
East Mediterr Health J. 2011 Nov;17(11):875-81. doi: 10.26719/2011.17.11.875.
The existing eruption schedules for permanent and deciduous dentition are based on studies in industrialized countries. This study determined the dates of emergence of deciduous teeth in a cross-sectional sample of 1132 Egyptian infants aged 4-36 months selected from different governorates of Egypt. The dates of emergence of individual teeth were calculated using Probit analysis. The mandibular left and right incisors were the earliest teeth to emerge at a mean of 8.0 months in boys and 7.9 months in girls. The sequence of eruption followed a typical pattern. The average time from emergence of the first tooth to the last tooth was 17.8 months in the mandible and 15.8 months in the maxilla for boys and 22.1 and 20.1 months respectively for girls. Four active phases of emergence were identified and compared with data from other countries.
现有的恒牙和乳牙萌出时间表是基于工业化国家的研究制定的。本研究通过对来自埃及不同省份的 1132 名 4-36 月龄的埃及婴儿进行横断面研究，确定了乳牙的萌出日期。使用概率分析计算了个别牙齿的萌出日期。下颌左右切牙是最早萌出的牙齿，男孩平均萌出时间为 8.0 个月，女孩为 7.9 个月。萌出顺序遵循典型模式。男孩下颌从第一颗牙萌出到最后一颗牙的平均时间为 17.8 个月，上颌为 15.8 个月；女孩分别为 22.1 个月和 20.1 个月。确定了四个活跃的萌出阶段，并与其他国家的数据进行了比较。
