Effect of Streptococcus mutans on mechanical properties of human dental structures
Effect of Streptococcus mutans on mechanical properties of human dental structures
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DOI：
10.1557/jmr.2009.0275
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发表时间：
2009-07-01
影响因子：
2.7
通讯作者：
Hsu, Hung-Bin
中科院分区：
文献类型：
--
作者：
Chang, Shou-Yi;Chung, Ren-Jei;Hsu, Hung-Bin
在这项研究中，人类牙齿结构的力学性能进行了研究，通过使用仪器化纳米压痕。将牙齿标本浸泡在含有变形链球菌（Streptococcus mutans）的溶液中，以阐明其对牙齿结构的微观结构和力学性能的影响。延长培养时间16 h，S. mutans Solutions下跌7.3至5.8。因此，在S. mutans溶液16 h。牙体结构开始轻度糜烂，64岁以后出现严重龋蚀，牙体特征明显。129 h后。牙釉质和牙本质的弹性模量分别下降到未处理样品的原始值的85%和67%，硬度分别下降到未处理样品的原始值的88%和55%。
In this Study, the mechanical properties of human dental structures have been investigated by using instrumented nanoindentation. Immersion in solutions containing Streptococcus mutans, which is the principal cause of dental caries, was applied to tooth specimens to clarify its effect oil the microstructure and mechanical properties of the dental Structures. With in extended time of up to 16 h, the pH value of the S. mutans Solutions dropped front 7.3 to 5.8. Therefore, after immersion in the S. mutans solutions for 16 h. slight erosions of the dental structures began, after 64 It, severe tooth decay Occurred with obviously etched dental features. After 129 h. the elastic modulus of enamel and dentine dropped to 85 and 67%, respectively, of the original Values Of untreated specimens, and the hardness dropped to 88 and 55%, respectively.