Comparison of nanohardness between coronal and radicular intertubular dentin
Comparison of nanohardness between coronal and radicular intertubular dentin
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DOI：
10.4012/dmj.28.295
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发表时间：
2009-05-01
影响因子：
2.5
通讯作者：
Miyazaki, Takashi
中科院分区：
文献类型：
--
作者：
Inoue, Toshiko;Saito, Makoto;Miyazaki, Takashi
本研究调查了冠状和根管间牙本质的硬度和杨氏模量。将10颗牛牙分为冠、根两组，然后沿牙轴沿着加工冠、根牙本质的平面。采用纳米压痕法测量冠、根管间牙本质的硬度和弹性模量。通过单向方差分析和Fisher PLSD检验对平均硬度和杨氏模量值进行统计比较。管间牙本质冠侧硬度为0.81 ± 0.05GPa，根侧为0.15 ± 0.02GPa。另外，冠状管间牙本质的杨氏模量为26.60 +/- 2.19 GPa，根状牙本质的杨氏模量为20.89 +/- 1.10 GPa。His的研究结果表明，冠状面管间牙本质的硬度和杨氏模量均大于根面管间牙本质。
This study investigated the hardness and Young's modulus of coronal and radicular intertubular dentin. Ten bovine teeth were each divided into coronal and radicular groups, and the flat Surfaces of the coronal and radicular dentin were subsequently processed along the tooth axis. The hardness and Young's modulus of the coronal and radicular intertubular dentin were evaluated using nanoindentation test at two locations per tooth. Mean hardness and Young's modulus values wore statistically compared by one-way ANOVA and Fisher's PLSD test. The hardness of coronal intertubular dentin was 0.81 +/- 0.05 GPa suid that of radicular dentin was 015 +/- 0.02 GPa. Additionally, the Young's modulus of coronal intertubular dentin was 26.60 +/- 2.19 GPa and that of radicular dentin was 20.89 +/- 1.10 GPa. Findings of His study revealed that the hardness and Young's modulus of coronal intertubular dentin were greater than those of radicular intertubular dentin.