Soda-lime glass as a binder in reusable experimental investment for dental castings

被引：2
作者：
Yagi, Satoshi [1 ]
Zhang, Zutai [1 ,2 ]
Aida, Yoshiteru [1 ]
Hotta, Yasuhiro [1 ]
Tamaki, Yukimichi [1 ]
Miyazaki, Takashi [1 ]
机构：
[1] Showa Univ, Sch Dent, Dept Oral Biomat & Technol, Shinagawa Ku, Tokyo 1428555, Japan
[2] Capital Med Univ, Capital Univ Med Sci Beijing Stomatol Hosp, Fac Stomatol, Beijing Inst Dent Res, Beijing 100050, Peoples R China
来源：
DENTAL MATERIALS JOURNAL | 2011年 / 30卷 / 05期
关键词：
Investment; Reuse; Glass; Cast; PHOSPHATE;
D O I：
10.4012/dmj.2011-040
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
In this study, different glasses were investigated to improve reusable investments. Borosilicate glass (BSG) powder and soda-lime glass (SLG) powder were prepared by milling broken beakers and microscope slides, respectively, and used in experimental investments (I-BSG, I-SLG) by blending glass powder (10wt%) with cristobalite (90wt%). Some properties and casting fits were evaluated with commercial gypsum-bonded investment as the control. Both BSG and SLG were mainly composed of Si, but SW had a large Ca content. The glass transition temperatures were approximately 800 degrees C (BSG) and 700 degrees C (SLG). Experimental investments with heating showed the significantly (p<0.05) higher expansion than that of the control. The compressive strength of I-SLG was higher than that of I-BSG, and increased with temperature. The MOD inlay obtained from I-SLG had a significantly smaller gap than that from I-BSG, and was comparable to the control. These results suggest SLG could be applied clinically as a reusable dental investment.
引用
收藏
页码：611 / 615
页数：5
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