Mechanical evaluation of five flowable resin composites by the dynamic micro-indentation method.
Mechanical evaluation of five flowable resin composites by the dynamic micro-indentation method.
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DOI：
10.1177/1758736014533983
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Tanimoto Y
中科院分区：
文献类型：
--
作者：
Hirayama S;Iwai H;Tanimoto Y
测量脆性材料的强度，如树脂复合材料，是非常困难的。微压痕硬度测试是研究小体积材料的机械性能的一种方便方法。在这项研究中，五个商业可流动树脂复合材料的力学性能进行了研究，通过动态显微压痕法。研究了无机填料含量对流动复合材料动态硬度和弹性模量的影响。通过灰化技术测定树脂复合材料中无机填料的重量百分比。结果表明，可流动复合材料的力学性能不仅受填料含量的影响，还与树脂基体的性质有关。总之，动态显微压痕法是一种测定牙科树脂复合材料作为脆性材料的力学行为的有用技术。
Measurement of the strength of brittle materials, such as resin composites, is extremely difficult. Micro-indentation hardness testing is a convenient way of investigating the mechanical properties of a small volume of material. In this study, the mechanical properties of five commercially available flowable resin composites were investigated by the dynamic micro-indentation method. Additionally, the effects of inorganic-filler content on the dynamic hardness and elastic modulus of flowable composites obtained by this method were investigated. The weight percentages of the inorganic fillers in the resin composites were determined by the ashing technique. The results indicate that the mechanical properties of flowable composites are affected by not only the filler content but also the properties of the resin matrix. In conclusion, the dynamic micro-indentation method is a useful technique for determining the mechanical behavior of dental resin composites as brittle material.