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Effect of Streptococcus mutans on mechanical properties of human dental structures

机译：变形链球菌对人体牙齿结构力学性能的影响

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摘要

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 on the microstructure and mechanical properties of the dental structures. With an extended time of up to 16 h, the pH value of the S. mutans solutions dropped from 7.3 to 5.8. Therefore, after immersion in the 5. mutans solutions for 16 h, slight erosions of the dental structures began; after 64 h, severe tooth decay occurred with obviously etched dental features. After 128 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.
机译：在这项研究中，已经通过使用仪器化的纳米压痕技术研究了人类牙齿结构的机械性能。将含有变形链球菌（其是龋齿的主要原因）的溶液浸入到牙齿样本中，以阐明其对牙齿结构的微观结构和力学性能的影响。在长达16小时的延长时间内，变形链球菌溶液的pH值从7.3降至5.8。因此，在5. mutans溶液中浸泡16小时后，牙齿结构开始出现轻微的腐蚀。 64小时后，严重的蛀牙发生，牙齿特征明显腐蚀。 128小时后，牙釉质和牙本质的弹性模量分别下降至未经处理样品原始值的85％和67％，硬度分别下降至88和55％。

著录项

  • 来源
    《Journal of Materials Research》 |2009年第7期|2301-2306|共6页
  • 作者

    Shou-Yi Chang; Ren-Jei Chung; Fang-Cheng Chou; Hsiang-Long Hsiao; Hung-Bin Hsu;

  • 作者单位

    Department of Materials Science and Engineering, National Chung Hsing University, Taichung 40227, Taiwan;

    Graduate Institute of Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan;

    Department of Materials Science and Engineering, National Chung Using University, Taichung 40227, Taiwan;

    Department of Materials Science and Engineering, National Chung Using University, Taichung 40227, Taiwan;

    Department of Materials Science and Engineering, National Chung Using University, Taichung 40227, Taiwan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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