【作者】 贺刚；

【导师】 岑远坤； 廖运茂；

【作者基本信息】 四川大学 ， 口腔临床医学， 2003， 硕士

【摘要】 研究目的：IPS-Empress2热压铸造陶瓷是一种成功的全瓷修复系统，本课题的目的就是研制一种与该系统专用包埋材料性能相当的国产包埋材料，以降低IPS-Empress2热压铸造陶瓷修复的成本，促进其推广应用，并填补我国在这一领域的空白。 研究方法：首先对IPS-Empress2专用快速包埋材料进行剖析，测出其主要性能指标，然后以此为参考，配制并筛选自制包埋材料的配方，获得拟定配方后，同样测试其主要性能指标，与IPS包埋材料进行对比，并在SPSS11.5软件上统计分析。同时还在扫描电镜下分析了两者的结构。 结果：IPS-Empress2专用快速包埋材料的凝固时间、凝固膨胀率、总膨胀率、烧结前密度、烧结后密度、开口孔隙率、凝固2小时后抗压强度和升温至920℃冷却后抗压强度分别为17.1分钟、8.58‰、11.7‰、1.576g／cm~3、1.320g／cm~3、38.8％、0.71MPa和6.07MPa；自制包埋材料的凝固时间、凝固膨胀率、总膨胀率、烧结前密度、烧结后密度、开口孔隙率、凝固2小时后抗压强度和升温至920℃冷却后抗压强度分别为9分钟、7.98‰、11.6‰、1.813g／cm~3、1.402g／cm~3、38.1％、5.42MPa和8.37MPa，且耐火度在1000℃以上，高于铸造温度920℃。自制包埋材料的凝固膨胀率、总膨胀率、开口孔隙率、烧结后密度和耐火度与IPS包埋材料无统计学差别，凝固时间比后者短，烧结前密度、凝固2小时后抗压强度和升温至920℃冷却后抗压强度均高于后者。扫描电镜显示两者都有磷酸盐结晶水合物晶体、石英及方石英颗粒和大量孔隙，而自制包埋材料的晶体体积小于IPS包埋材料。 结论：自制包埋材料在主要性能指标上都接近或优于IPS-Empress2专用快速包埋材料，有良好的临床应用前景。更多还原

【Abstract】 Purpose: IPS-Empress2 heat-pressed castable ceramic system is a successful all-ceramic prosthetic system in clinic. The purpose of this study is to develop a kind of domestic investment material that is comparable to the special investment material of IPS system to lower the cost of its clinical application. Method: We detect the main properties of IPS special investment material firstly as an index of our own domestic material. Then we make a prototype of our domestic material. Several specimens are obtained by altering the amount and proportion of some key ingredients. The main properties of each specimen are tested to select the best one. After the best one is determined, a thorough study is done on it. The SPSS statistics software evaluates the differences between our domestic material and the special material.Results: The setting time, setting expansion rate, total expansion rate, density before heating, density after heating, rate of open hole, compressive strength at 2 hours after setting and compressive strength after heating to 920 of the special investment material for IPS-Empress2 are 17.1minutes, 8.58 ‰, 11.7 ‰, 1.576g/cm3, 1.320g/cm3, 38.8‰, 0.71MPa and 6.07MPa respectively; while the setting time, setting expansion rate, total expansion rate, density before heating, density after heating, rate of open hole, compressive strength at 2 hours after setting and compressive strength after heating to 920 of our domestic investment material are 9 minutes, 7.98‰, 11.6‰, 1.813g/cm3, 1.402g/cm3,38.1%, 5.42MPa and 8.37MPa respectively. And it can bear the temperature of at least 1000 . There are no statistical differences in the setting expansion rate, total expansion rate, rate of open hole, density after heating between the two materials. The setting time of our material is statistically shorter. The compressive strength before and after heating, the density before heating of our domestic investment material are statistically higher than that of IPS special investment material. Under the scanning electronic microscope, the crystals of the phosphate hydrate in our domestic material are smaller than those in the IPS special material.Conclusion: The domestic investment material for the IPS-Empressl heat-pressed castable ceramic system is comparable to its special investment material, thus has a promising prospect of future clinical application.更多还原