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本文分析了现今冠修复用材料的优缺点,提出了玻璃陶瓷用于冠修复。作者采用Sio_2-B_2O_3-Al_2O_3-K_2O-F系的结晶化玻璃(玻璃陶瓷),此种玻璃工业上已实用化,可快速切削而不破碎,甚至能旋转加工。作者配制了这类玻璃陶瓷材料数十种。玻璃陶瓷破碎粉末用扫描电子显微镜检查,热处理前有锐利的破面,热处理后则没有。因此热处理后的玻璃陶瓷一旦在口内破碎不会伤及口腔粘膜。试件收缩率比牙用合金小,但表面粗糙为合金的2～3倍。压缩强
In this paper, the advantages and disadvantages of the crown compound materials are analyzed, and the glass ceramic is proposed for crown restoration. The author uses the Sio_2-B_2O_3-Al_2O_3-K_2O-F series of crystallized glass (glass ceramic), the glass industry has been practical, fast cutting without breaking, or even rotating processing. The author prepared dozens of these glass-ceramic materials. Glass ceramic powder with a scanning electron microscope examination, before the heat treatment has a sharp broken surface, no heat treatment. Therefore, heat treatment of glass ceramic once broken in the mouth will not hurt the oral mucosa. The shrinkage of the specimen is smaller than that of the dental alloy, but the surface roughness is 2 to 3 times of the alloy. Strong compression