[摘要] 目的：分析探讨乳牙釉质、牙本质钙含量状况与龋病关系。方法：对37例5~7岁幼儿园乳恒牙替换所拔除的下颌乳中切牙，用电子探针X线显微分析仪检测各牙之近中侧、远中侧、唇侧和舌侧之釉质和牙本质不同深度之钙含量。受检测牙37颗(1｜ 18颗，｜1 19颗)。37例中dft=0者14名，为无龋组；dft>0者23名，为有龋组。有龋组中0
    [关键词] 乳牙 牙釉质 牙本质 钙含量 电子探针

    Study on the Calcium Content of Enamel and Dentin in Deciduous Teeth.

    SHI Si-zhen, LIANG Qin, LAI Hong, et al.

    Research Institute of Pediatric Dentistry, Tongji University, Shanghai 200032

    [Abstracts]Objective: To analyze the content of calcium in enamel and dentin of deciduous teeth and study their relationships with caries status. Methods: 37 children aged 5~7 years were enrolled in this study. 37 lower primary incisors were collected. They were divided into caries-free group (dft = 0, n=14) and caries group (dft>0, n=23). Caries group were further divided into low-caries-risk group (00.05). Difference of Ca content in depths is found in labial, lingual and mesial sides except distal side. Totally in dentin, the Ca content is the highest in inner layer, then medium layer, and lowest in outer layer. 3) There is no difference of Ca content in enamel or dentin between caries-free group and caries-group. A relatively lower negative correlation is found between contents in Ca of mesial and labial enamel with dft (r=-0.46, r=-0.40) and not in any other parts. Conclusions: Distribution of Ca content in enamel and dentin in deciduous teeth was investigated. There was no obvious relationship between Ca contents in enamel, dentin in deciduous teeth and caries status. ......

    百拇医药网 http://www.100md.com/html/DirDu/2005/09/24/74/14/95.htm

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