Siervo S, Bandettini B, Siervo P, Falleni A, Siervo R
School of Dentistry, University of Milan, Italy.
Int J Prosthodont. 1994 Sep-Oct;7(5):434-39.
CELAY is a machinable ceramic system that is capable of milling inlays, onlays, and veneers from prefabricated industrial ceramic blocks. Direct intraoral or indirect patterns may be used to make ceramic restorations. Scanning electron microscopy was used to analyze the marginal gap of restorations obtained with both methods. The direct fabrication technique yielded significantly better marginal gap sizes (P < .01) for the interproximal areas, while with the indirect (P < .01) fabrication technique the restorations showed significantly smaller marginal gaps at the occlusal borders. The clinical relevance of these findings and their possible applications for the development of a new impression material are discussed.
CELAY是一种可加工的陶瓷系统，能够从预制的工业陶瓷块中铣削嵌体、高嵌体和贴面。可以使用直接口内或间接模型来制作陶瓷修复体。采用扫描电子显微镜分析用这两种方法获得的修复体的边缘间隙。直接制作技术在邻面区域产生的边缘间隙尺寸明显更好（P < 0.01），而间接制作技术的修复体在咬合边缘的边缘间隙明显更小（P < 0.01）。讨论了这些发现的临床相关性及其在新型印模材料开发中的可能应用。
