Durability of tungsten carbide burs for the fabrication of titanium crowns using dental CAD/CAM
Durability of tungsten carbide burs for the fabrication of titanium crowns using dental CAD/CAM
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DOI：
10.4012/dmj.23.190
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发表时间：
2004-06-01
影响因子：
2.5
通讯作者：
Ogura, H
中科院分区：
文献类型：
--
作者：
Hotta, Y;Miyazaki, T;Ogura, H
本研究的目的是评价使用两种牙科CAD/CAM系统（DECSY，Digital Process，Japan和Cadim，Advance，Japan）制造钛冠时碳化钨布尔斯的耐用性。检查每个系统中的碳化钨钻，并在没有断裂的情况下用于制造51个钛冠。对于这两种系统，在第11次加工时，在磨头刀片上发现了微小的碎屑。随着加工次数的增加，这些切屑逐渐变大。在第一次加工时，两个系统之间的牙冠上的平均表面粗糙度没有显著差异（DECSY为1.6 μ m，Cadim为1.2 μ m）。随着加工次数的增加，切削槽变钝，平均表面粗糙度增加。得出的结论是，两种系统的碳化钨布尔斯钻可用于制造多达51个钛冠。
The purpose of this study was to evaluate the durability of tungsten carbide burs for the fabrication of titanium crowns using two dental CAD/CAM systems (DECSY, Digital Process, Japan and Cadim, Advance, Japan). A tungsten carbide bur in each system was examined and used without fracture to fabricate 51 titanium crowns. For both systems tiny chips were found on the bur blade at the 11th machining. These chips gradually enlarged as the number of machining times increased. At the first machining no significant difference in the average surface roughness was found on the crown between the two systems (1.6mum for DECSY and 1.2mum for Cadim). The cutting grooves became dull and the average surface roughness increased as the number of machining times increased. It is concluded that the tungsten carbide burs for both systems can be used to fabricate up to 51 titanium crowns.