Wear properties of Ti and Ti-6Al-7Nb castings for dental prostheses
Wear properties of Ti and Ti-6Al-7Nb castings for dental prostheses
复制标题
DOI：
10.1016/s0142-9612(02)00533-1
复制
发表时间：
2003-04-01
期刊：
影响因子：
14
通讯作者：
Kurosaki, N
中科院分区：
文献类型：
--
作者：
Iijima, D;Yoneyama, T;Kurosaki, N
钛因其良好的生物相容性而越来越多地应用于口腔修复。然而，由于纯钛的强度低和耐磨性差，其应用仍然受到限制。本研究的目的是评价牙科用高强度Ti-6Al-7 Nb合金铸件的耐磨性。测试样本由商业纯钛（CP-Ti等级2和3）和Ti-6Al-7 Nb合金锭铸造而成，并进行模拟咬合载荷模式的磨损测试。通过试验过程中的重量损失来评价耐磨性。发现Ti-6Al-7 Nb合金表现出比CP-Ti更低的重量损失。此外，试验后的扫描电子显微镜（SEM）观察表明，Ti-6Al-7 Nb合金的磨损表面比CP-Ti光滑得多。这些结果表明，Ti-6Al-7 Nb合金铸件可用于生产具有改善的耐磨性和机械强度的牙科修复体。(C)2002爱思唯尔科技有限公司版权所有。
Titanium has been increasingly applied to dental prostheses because of its biocompatibility. However, application remains limited, due to the low strength and poor wear resistance of unalloyed titanium. The purpose of this study is to evaluate the wear resistance of high-strength Ti-6Al-7Nb alloy castings for dental application. Test specimens were cast from commercially pure titanium (CP-Ti grades 2 and 3) and Ti-6Al-7Nb alloy ingots, and subjected to a wear test simulating the occlusal loading pattern. Wear resistance was evaluated by the weight loss during the test. Ti-6Al-7Nb alloy was found to exhibit lower weight loss than CP-Ti. Moreover, scanning electron microscopic (SEM) observation after the test revealed that the worn surface of Ti-6Al-7Nb alloy is much smoother than that of CP-Ti. These results indicate that Ti-6Al-7Nb alloy castings can be used to produce dental prostheses of improved wear resistance and mechanical strength. (C) 2002 Elsevier Science Ltd. All rights reserved.