The high quality prostheses fabrication on compound machining by CAE

近年来，激光焊接已被用于连接金属零件，特别是钛修复体。但由于存在基于操作者技能的质量控制困难、焊接过程中出现不规则收缩以及设备成本较高等缺点，激光焊接在日本牙科实验室工作中尚未普及。尽管我们知道精密铸造是牙科金属修复体最流行的制造方法，在这项研究中，我们研究了将数控电火花加工和激光焊接相结合的方法来制造种植体上部结构的复合材料贴面的钛骨架。在基础研究的基础上，采用两级光束能量设置和焊接过程中的NC照射回转，获得了良好的匹配效果。我们得出结论：激光焊接在口腔修复中的应用是很有前途的，特别是在数控工艺下，但我们必须管理能量和照射路径来进行质量控制。

Recently laser welding has been expected to connect metal parts especially titanium prosthetic devices.However, since there are several drawbacks such as the difficult quality control based on the operator's skill, the occurrence of irregular shrinkage during welding, and the high cost of the equipment, laser welding has not been popular in dental laboratory works in Japan yet.Even we understand precision casting is the most popular fabrication method of dental metallic prostheses, we believe we call reduce labor when fabricating parts of the prostheses individually followed by connecting together by laser welding.In this study we investigated this procedure to apply to fabricate the titanium framework for composites veneering of implant superstructure with combining numerically controlled wire electric discharge machining and laser welding experimentally developed.Excellent fit of the frameworks was achieved when applying the two-stage beam energy setting and the NC irradiating turn during welding based on the fundamental studies.We conclude laser welding is promising for applying dental prostheses especially under numerically controlled procedure, but we have to manage energy and irradiating path for the quality control.