口腔矫形修复体的制作,首先要求有准确的模型。无论制作固定、部分托牙、全口托牙或金属烤瓷等都离不开模型。理想的模型材料应该具有抗压强度高、硬度大、流动性能好、体积稳定、凝固时间适当、操作方便。目前广泛使用的模型石膏还不能达到理想的要求。为此我们与建筑科学研究所联合研制α-超硬石膏。它具备模型石膏的应有指标。 Oral orthopedic prosthesis production, first of all require an accurate model. Regardless of the production of fixed, some dentures, full denture or metal porcelain, etc. are inseparable from the model. The ideal model material should have high compressive strength, hardness, good flow properties, volume stability, setting time appropriate, easy to operate. Currently widely used model gypsum can not meet the desired requirements. To this end, we jointly developed with the Institute of Building Materials a-anhydrite gypsum. It has the model gypsum should have the target.