固定义齿锤造术,目前国内外都正在采用机械加工代替手工操作,但有些方法还不理想,如内扩式液压机,体积虽小,但其附件多,价格高,成型的冠存在冠壁薄、内径小于基牙,造成就位困难等问题。国内一些单位,设计的聚氨酯油压无缝冠成型机,存 Fixed denture hammer surgery, at home and abroad are using mechanical processing instead of manual operation, but some methods are not ideal, such as the expansion of the hydraulic machine, the volume is small, but its attachment, the price is high, the crown crown molding exist thin , Less than the diameter of the abutment, resulting in difficulties in place and other issues. Some domestic units, the design of polyurethane seamless crown molding machine, save