Inagaki Ryoichi, Kikuchi Masafumi, Takahashi Masatoshi, Takada Yukyo, Sasaki Keiichi
School for Dental Laboratory Technicians, Tohoku University.
Dent Mater J. 2015;34(5):679-85. doi: 10.4012/dmj.2015-014.
Titanium is difficult to machine because of its intrinsic properties. In a previous study, the machinability of titanium was improved by alloying with silver. This study aimed to evaluate the durability of tungsten carbide burs after the fabrication of frameworks using a Ti-20%Ag alloy and titanium with a computer-aided design and computer-aided manufacturing system. There was a significant difference in attrition area ratio between the two metals. Compared with titanium, the ratio of the area of attrition of machining burs was significantly lower for the experimental Ti-20%Ag alloy. The difference in the area of attrition for titanium and Ti-20%Ag became remarkable with increasing number of machining operations. The results show that the same burs can be used for a longer time with Ti-20%Ag than with pure titanium. Therefore, in terms of tool life, the machinability of the Ti-20%Ag alloy is superior to that of titanium.
由于钛的固有特性，其加工难度较大。在先前的一项研究中，通过与银合金化提高了钛的可加工性。本研究旨在评估使用Ti-20%Ag合金和钛，通过计算机辅助设计和计算机辅助制造系统制作框架后，硬质合金车针的耐用性。两种金属的磨损面积比存在显著差异。与钛相比，实验性Ti-20%Ag合金加工车针的磨损面积比显著更低。随着加工操作次数的增加，钛和Ti-20%Ag的磨损面积差异变得显著。结果表明，与纯钛相比，使用Ti-20%Ag时相同的车针可使用更长时间。因此，就刀具寿命而言，Ti-20%Ag合金的可加工性优于钛。
