冠部和根部管间牙本质纳米硬度的比较。
Comparison of nanohardness between coronal and radicular intertubular dentin.
作者信息
Inoue Toshiko, Saito Makoto, Yamamoto Masato, Debari Kazuhiro, Kou Keitatsu, Nishimura Fumio, Miyazaki Takashi
机构信息
Department of Oral Biomaterials and Technology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan.
出版信息
Dent Mater J. 2009 May;28(3):295-300. doi: 10.4012/dmj.28.295.
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 tests, at two locations per tooth. Mean hardness and Young's modulus values were statistically compared by one-way ANOVA and Fisher's PLSD test. The hardness of coronal intertubular dentin was 0.81 +/- 0.05 GPa and that of radicular dentin was 0.55 +/- 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 this study revealed that the hardness and Young's modulus of coronal intertubular dentin were greater than those of radicular intertubular dentin.
本研究调查了冠部和根部管间牙本质的硬度及杨氏模量。将十颗牛牙分别分为冠部组和根部组，随后沿牙轴对冠部和根部牙本质的平面进行处理。使用纳米压痕试验在每颗牙的两个位置评估冠部和根部管间牙本质的硬度及杨氏模量。通过单因素方差分析和Fisher最小显著差异检验对平均硬度和杨氏模量值进行统计学比较。冠部管间牙本质的硬度为0.81±0.05吉帕，根部牙本质的硬度为0.55±0.02吉帕。此外，冠部管间牙本质的杨氏模量为26.60±2.19吉帕，根部牙本质的杨氏模量为20.89±1.10吉帕。本研究结果显示，冠部管间牙本质的硬度和杨氏模量大于根部管间牙本质的硬度和杨氏模量。
Zotero 插件