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七部分托牙的实验室制作——包埋铸造部分包埋是利用特制包埋材料涂布在蜡铸件的表面,经过烘烤后结成坚硬的模壳,在高温下有一定的热膨胀补偿合金体积的收缩,并能承受离心铸造时金属对模腔壁的冲击力,与金属不起化学作用能保持铸件原有的表面光洁度。目前包埋分内层和外层进行。内层包埋的方法有脱蜡形非真空内层包埋法;蜡形带模非真空包埋法及真空包埋法。包埋材料的不同其方法也有一定的差异。1.脱蜡形非真空内层包埋法:此种方法是目前既经济操作又方便的方法之一。材料为水解乙硅酸乙酯
Seven parts denture laboratory production - embedded cast part of the embedding is the use of special embedded materials coated on the surface of the wax casting, after baking to form a hard shell, at high temperatures have some thermal expansion compensation alloy Volume shrinkage, and can withstand the centrifugal casting metal on the cavity wall impact, and metal can not afford chemical to maintain the original surface finish castings. Currently embedded in the inner and outer layers. The inner layer embedding methods are dewaxed non-vacuum inner layer embedding method; wax-shaped tape non-vacuum embedding method and vacuum embedding method. Different methods of embedding materials also have some differences. 1. Dewaxed non-vacuum embedded in the inner layer: This method is currently both economical and convenient way. The material is hydrolyzed ethyl ethyl silicate