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| 人体天然牙不同深度层次的显微硬度与耐磨性的研究 | |
| 引用本文： | 张杰,黎红,周仲荣,陈光雄,宋之敏. 人体天然牙不同深度层次的显微硬度与耐磨性的研究[J]. 生物医学工程学杂志, 2002, 19(4): 621-623 |
| 作者姓名： | 张杰 黎红 周仲荣 陈光雄 宋之敏 |
| 作者单位： | 1. 西南交通大学,摩擦学研究所,成都,610031 2. 西南交通大学,摩擦学研究所,成都,610031;四川大学,华西口腔医院,成都,610041 3. 四川大学,分析测试中心,成都,610065 |
| 基金项目： | 四川省博士后基金，西南交大校基金 ( 0 0 XM0 8)，四川大学华西口腔医学院基金联合资助项目 |
| 摘 要： | 采用显微硬度计测定人体天然牙不同深度层次 (牙釉质、釉牙本质界及牙本质 )的显微硬度 ,并在改进后的微动试验台上对其相应区域进行了模拟牙齿摩擦副的摩擦磨损试验研究。结果发现 ,显微硬度 :牙釉质的为3 2 0 .40± 2 2 .77HV,釉牙本质界 2 3 2 .2 6± 3 2 .3 1HV,牙本质 61.17± 9.42 HV( P<0 .0 5 ) ;磨痕深度 :牙釉质的为17.3 3± 0 .5 8μm,釉牙本质界 49.44± 16.47μm,牙本质 95 .2 0± 15 .0 7μm( P<0 .0 5 ) ;牙釉质的耐磨性明显高于牙本质 ,值得牙科临床注意 |
| 关 键 词： | 耐磨性 人天然牙 显微硬度 摩擦磨损 牙釉质 釉牙本质界 牙本质 生物力学 |
Study on Micro-hardness and Wear Resistance of Human Tooth at Different Depth |
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| Jie Zhang,Hong Li,Zhongrong Zhou,Guangxiong Chen,Zhimin Song. Study on Micro-hardness and Wear Resistance of Human Tooth at Different Depth[J]. Journal of biomedical engineering, 2002, 19(4): 621-623 | |
| Authors: | Jie Zhang Hong Li Zhongrong Zhou Guangxiong Chen Zhimin Song |
| Affiliation: | Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031. |
| Abstract: | Micro-hardness of human teeth was measured by micro hardnessmentry at different depths i.e. enamal, enamelo-dentinal junction and dentin. A simulated dental friction test was conducted of respectively in these three areas, opposing pure titanium ball under a modified fretting machine. The results showed that micro-hardness is 320.40 +/- 22.77 HV of enamal, 232.26 +/- 32.31 HV of enamelo-dentinal junction, and 61.17 +/- 9.42 HV of dentin (P < 0.05). Wear depth is 17.33 +/- 0.58 microns of enamal, 49.44 +/- 16.47 microns of enamelo-dentinal junction and 95.20 +/- 15.07 microns of dentin(P < 0.05). Wear resistance of enamal is much better than that of dentin's. This preliminary investigation should be very useful in clinical applications. |
| Keywords: | Human natural tooth Micro-hardness Friction wear |
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