正常乳牙和恒牙中牙釉质和牙本质矿相的晶体学特性。
The crystallographic properties of the mineral phases of enamel and dentin in normal deciduous and permanent teeth.
作者信息
Zhao Wei, Wang Shuozhi, Hong Hanlie, Chen Zhi, Fan Mingwen, Yu Shifeng
机构信息
Department of Operative Dentistry and Endodontics, Guanghua Hospital of Stomotology, Sun Yat-Sen University, Guangzhou 510060, China.
出版信息
Zhonghua Kou Qiang Yi Xue Za Zhi. 2002 May;37(3):219-21.
OBJECTIVE
To investigate the crystallographic properties of the mineral phases of normal enamel and dentin (dental apatite) in deciduous and permanent teeth.
METHODS
Three kinds of physical methods including X-ray diffraction (XRD), infrared absorption spectroscope (IR) and electron probe micro-analysis (EPMA) were utilized in this study.
RESULTS
Dental apatite was not uniphase, but multiphase, which could be described as carbonate-substituted hydroxyapatite. Compared to dentin apatite, the higher crystallinity and expanded a-axis lattice parameters were found in enamel. Chemical analyses demonstrated that higher concentrations of Mg and CO(3)(2-) were found in dentin than those of enamel. But enamel had higher Cl content.
CONCLUSIONS
The differences among enamel and dentin, in terms of lattice parameter and crystallinity may be partially attributed to the incorporation of Mg, CO(3)(2-) and Cl minor elements.
目的
研究乳牙和恒牙中正常釉质和牙本质（牙釉质）矿相的晶体学特性。
方法
本研究采用了三种物理方法，包括X射线衍射（XRD）、红外吸收光谱仪（IR）和电子探针微分析（EPMA）。
结果
牙釉质不是单相的，而是多相的，可描述为碳酸盐取代的羟基磷灰石。与牙本质磷灰石相比，釉质中发现了更高的结晶度和扩展的a轴晶格参数。化学分析表明，牙本质中Mg和CO(3)(2-)的浓度高于釉质。但釉质的Cl含量更高。
结论
釉质和牙本质在晶格参数和结晶度方面的差异可能部分归因于Mg、CO(3)(2-)和Cl微量元素的掺入。
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