CHEMICALLY DISTINCT STAGES IN DEVELOPING HUMAN-FETAL ENAMEL
CHEMICALLY DISTINCT STAGES IN DEVELOPING HUMAN-FETAL ENAMEL
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DOI：
10.1016/0003-9969(80)90093-x
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发表时间：
1980-01-01
影响因子：
3
通讯作者：
GEDALIA, I
中科院分区：
文献类型：
--
作者：
DEUTSCH, D;GEDALIA, I
5-9月龄人胎儿上颌第一切牙釉质发育的形态和化学分析。在这一发展过程中，经历了两个阶段。第一阶段对应于形成釉质的产生，釉质柔软、半透明且部分矿化。第二是釉质的成熟或次生矿化。釉质发育的最后阶段，即，在9个月大的胎儿的牙齿中通常不存在成熟的、硬的釉质。牙轴中形成釉质的P和Ca浓度没有显著变化，分别在9-12和21- 26重量%之间变化。在第二阶段，P和Ca浓度在形成和成熟釉质之间的边界急剧上升，分别达到最大值17%和35%。
Chemical analyses and the appearance of developing enamel from 1st maxillary incisors of human fetuses aged 5-9 mo. distinguished 2 stages during this period of development. The 1st corresponded with the production of forming enamel, which was soft, translucent and partially mineralized. The 2nd to the maturation or secondary mineralization of enamel. The final stage in enamel development, i.e., the mature, hard enamel is generally absent in the tooth of the 9 mo old fetus. The concentrations of P and Ca of the forming enamel in the tooth axis did not change significantly, varying between 9-12 and 21-26% by weight, respectively. The P and Ca concentrations rose steeply across the boundary between the forming and the maturing enamel to reach a maximum value of 17 and 35%, respectively, in the 2nd stage.