苏打石灰玻璃作为可重复使用实验性铸造包埋料的结合剂。

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

机构信息

Department of Oral Biomaterials & Technology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan.

出版信息

Dent Mater J. 2011;30(5):611-5. doi: 10.4012/dmj.2011-040. Epub 2011 Sep 23.

DOI:10.4012/dmj.2011-040

PMID:21946480

Abstract

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 (10 wt%) with cristobalite (90 wt%). 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 SLG had a large Ca content. The glass transition temperatures were approximately 800°C (BSG) and 700°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.

摘要

本研究旨在探索不同类型的玻璃以提高可重复使用的投资回报率。分别通过研磨碎烧杯和显微镜载玻片来制备硼硅酸盐玻璃（BSG）粉末和钠钙玻璃（SLG）粉末，并将玻璃粉末（10wt%）与方石英（90wt%）混合用于实验性铸型（I-BSG、I-SLG）。采用商业石膏结合型铸型作为对照，评估了这些铸型的部分性能和铸造适合性。BSG 和 SLG 主要由 Si 组成，但 SLG 具有较高的 Ca 含量。玻璃化转变温度分别约为 800°C（BSG）和 700°C（SLG）。加热后的实验性铸型的膨胀率明显高于对照组（p<0.05）。I-SLG 的抗压强度高于 I-BSG，且随温度升高而增加。从 I-SLG 获得的 MOD 嵌体的间隙明显小于从 I-BSG 获得的嵌体，且与对照组相当。这些结果表明，SLG 可作为一种可重复使用的牙科铸型材料在临床上应用。