Synergistic effects of magnesium and carbonate on properties of biological and synthetic apatites.
Synergistic effects of magnesium and carbonate on properties of biological and synthetic apatites.
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DOI：
10.3109/03008209509017003
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发表时间：
1995-01-01
影响因子：
2.9
通讯作者：
LeGeros, J P
中科院分区：
文献类型：
--
作者：
LeGeros, R Z;Kijkowska, R;LeGeros, J P
镁（Mg）和碳酸盐（CO 3）是与牙釉质、牙本质和骨磷灰石相关的微量元素。本研究的目的是确定Mg和CO 3对合成磷灰石的某些性质的影响，以了解它们对生物磷灰石的影响。采用X射线衍射、红外吸收、热重分析和化学分析对人牙釉质、牙本质和牛骨中的生物磷灰石以及含/不含Mg或CO 3的合成磷灰石进行了表征。还测定了在酸性缓冲液中的溶出度。本研究结果表明：（1）Mg和CO 3在降低合成磷灰石的结晶度和增加溶解程度方面具有协同作用;（2）与釉质磷灰石相比，牙本质和骨中含有较高水平的Mg和CO 3;具有较低的结晶度和较高的溶解程度。与釉质磷灰石相比，牙本质和骨的较低结晶度和较高溶解程度可能部分归因于其较高的Mg和CO 3浓度。
Magnesium (Mg) and carbonate (CO3) are minor elements associated with enamel, dentin and bone apatite. The purpose of this study was to determine the effect of Mg and CO3 on some properties of synthetic apatites to gain insights on their effects on biological apatites. Biological apatites from human enamel and dentin and from bovine bone and synthetic apatites with/without Mg or CO3 were characterized using x-ray diffraction, infrared absorption, thermogravimetry and chemical analyses. Dissolution in acidic buffer was also determined. Results from this study demonstrated: (1) the synergistic effects of Mg and CO3 on reducing the crystallinity and increasing the extent of dissolution of synthetic apatites; (2) dentin and bone, compared to enamel apatite contained higher levels of Mg and CO3; had lower crystallinity and higher extent of dissolution. The lower crystallinity and higher extent of dissolution of dentin and bone compared to enamel apatite may be partly attributed to their higher Mg and CO3 concentrations.