常规牙体预备，取模，超硬石膏灌制工作模型。
Regular teeth and ready, take modulus, superhard gesso cut working model.
结果不同印模材料采印及灌注的普通石膏模型，人造石和超硬石膏模型，其表面光滑度及硬度均有所差异。
Results There had difference on the surface smoothness and hardness of models made with different impression materials and different model materials.
目的：测定涂布超硬石膏表面硬化剂有机硅树脂前后石膏模型的表面硬度和抗磨损性能，为该石膏表面硬化剂的临床应用提供依据。
The superficial hardening of non-quenched steels had been carried out on a surface grinder, the influences of grinding mode and cooling conditions on the surface hardened layer were studied.
再以同一金属模型为母模，应用玉洁新消毒液调和藻酸盐印模材料制取10个印模，以超硬石膏灌模，比较石膏模型与母模之间指标线段长度差异。
Copied the same metal model and 10 impressions were taken in the same way. They were poured in dental stone, comparing the length divergence between dental stone plaster with the impression.
再以同一金属模型为母模，应用玉洁新消毒液调和藻酸盐印模材料制取10个印模，以超硬石膏灌模，比较石膏模型与母模之间指标线段长度差异。
Copied the same metal model and 10 impressions were taken in the same way. They were poured in dental stone, comparing the length divergence between dental stone plaster with the impression.
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