不同固化剂比例对锆基钛用包埋料物理性能的影响  

Effects of the ratio between adhesive and solidification agent on the physical properties of the investment for zirconium-oxide titanium

作　　者：曹磊[1] 郭天文[1] 王有序[2] 杨瑟飞[1] 

机构地区：[1]西安第四军医大学口腔医学院修复科,710032 [2]西安西北工业大学材料系国家重点凝固实验室

出　　处：《实用口腔医学杂志》2007年第3期380-382,共3页Journal of Practical Stomatology

基　　金：国家自然科学基金项目(编号:30171022)

摘　　要：目的:研究加入不同比例固化剂对氧化锆基钛用包埋料物理性能的影响。方法:将砂A与粉B按13∶7的比例充分混合成粉料C,将C与黏结剂D按7.5∶1之比混合,分别按14∶1、14.5∶1、15∶1的黏结剂与固化剂之比添加固化剂E调和,分别包埋预先制作好的片状(10mm×10mm×0.8mm)蜡熔模12片,铸造成纯钛铸件。观察浆料的操作性、型壳表面状态、铸件颜色、完整性、边缘清晰程度,依据实验结果确定配方。在1、3、5、7d分别取黏结剂D测定动力黏度、密度、pH值。结果:14∶1配比组的材料固化过快,无法操作;15∶1配比组固化时间较长,铸圈有回溶现象,铸件变形;14.5∶1配比组初凝时间合适,焙烧后型壳表面无裂纹,浇注腔完整光滑,铸件表面喷砂后呈金属色。黏结剂1、3、5、7d的动力黏度、密度、pH值无显著差异。结论:黏结剂与固化剂按14.5∶1之比混合后包埋蜡熔模、铸造,能得到优良的钛铸件;实用环境下黏结剂在7d内性能指标无明显差异。Objective：To study the effects of different ratios between adhesive and solidification agent on the investment of titanium and to investigate the physical properties of the adhesive on different time intervals. Methods： Mixed adhesive with solidification agent according to different ratio： 14： 1, 14.5： 1, 15： 1. Twelve wax sheet patterns （10 mm × 10 mm ×0.8 mm） were invested, and then the castings were fabricated. Manipulation performance, appearance of the casting mold, and color of the castings as well as their integrity and edge clarity were observed. The more ideal proportion was selected and determined. Dynamic viscosity, density and pH value of the adhesive were measured on different days （1,3, 5 and 7 days）. Results：With a adhesive or solidification agent ratio of 14： 1, the solidified time was comparatively short and unable to operate, while with a ratio of 15： 1, the solidified time was too long to solidify and led to the distorted castings. In group with a ratio of 14.5： 1, the primary gel time, intact mold and cast gate were appropriate. The surface of the castings showed bright, metal color after sand blasting. Dynamic viscosity, consistency and pH value of different days for the adhesive had no significant difference. Conclusion： Favorable casting can be fabricated for adhesive mixing with solidification agent when the ratio was 14.5： 1. The adhesive has steady capability in 7 days in practical condition.

关 键 词：纯钛 冠桥 铸造 包埋材料 

分 类 号：R783.1[医药卫生—口腔医学]