Crystal structure studies of human dental apatite as a function of age.
Crystal structure studies of human dental apatite as a function of age.
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DOI：
10.1155/2009/698547
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发表时间：
2009
影响因子：
3.1
通讯作者：
Perdikatsis V
中科院分区：
文献类型：
--
作者：
Leventouri T;Antonakos A;Kyriacou A;Venturelli R;Liarokapis E;Perdikatsis V
本文报道了5-87岁年龄范围内人牙磷灰石平均晶体结构特性的研究。牙用羟基磷灰石的结晶度随年龄的增长而降低。与碳酸盐磷灰石中的碳酸盐含量相关的a-晶格常数以系统的方式随年龄而减小，而c-晶格常数没有显著变化。热重测量表明，碳酸盐含量的增加与年龄。FTIR光谱揭示了B型和A型碳酸酯取代，其中B型取代大于A型取代高达~5倍。碳酸盐含量随年龄的增加可以从ν 2CO 3与ν 1 PO 4红外模式的比值推断。
Studies of the average crystal structure properties of human dental apatite as a function of age in the range of 5–87 years are reported. The crystallinity of the dental hydroxyapatite decreases with the age. The a-lattice constant that is associated with the carbonate content in carbonate apatite decreases with age in a systematic way, whereas the c-lattice constant does not change significantly. Thermogravimetric measurements demonstrate an increase of the carbonate content with the age. FTIR spectroscopy reveals both B and A-type carbonate substitutions with the B-type greater than the A-type substitution by a factor up to ~5. An increase of the carbonate content as a function of age can be deduced from the ratio of the ν 2CO3 to the ν 1PO4 IR modes.