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人类牙列的发育和萌出一直是许多学者研究的课题。Gazu,Lewis和Polacheck认为,假定人类牙列的发育速度是一样的观点是错误的。Koski曾观察到女孩牙的平均发育速度要比男孩约早3%。Hunt在研究右下第一磨牙的钙化,萌出和龋坏中曾注意到普遍的女孩牙钙化较男孩为早,而与体重和个体大小无关。Sturdivant,Knott和Meredith通过对57个男孩的连续研究断定牙萌出的年龄是有变异的。这种变异在第一磨牙最小,切牙次之,而尖牙和第二双尖牙最高。在作者
The development and eruption of human dentition has been the subject of many scholars' research. Gazu, Lewis and Polacheck argue that it is wrong to assume that human dentition is developing at the same rate. Koski observed that girls' teeth averaged about 3% faster than boys. Hunt noted that calcification, eruptions, and caries in the lower right first molar were notable for the prevalence of dental calcification in girls compared to boys, regardless of body weight and size. Sturdivant, Knott, and Meredith conclude that there is variation in the age of eruptions through a series of 57 boys. This variation in the first molars the smallest, the second best, while the canine and the second highest bicuspus. At the author