Naylor W P, Munoz C A, Goodacre C J, Swartz M L, Moore B K
USAF Dental Investigation Service.
Int J Prosthodont. 1991 Mar-Apr;4(2):147-51.
One advantage cited for the use of Dicor over other ceramic materials is a reported Knoop hardness comparable to human enamel. However, when fabricating dental restorations, a Dicor glass-ceramic casting generally is subjected to several different surface treatments because of processing, esthetic, and functional requirements. Therefore, this study compared the Knoop hardness of Dicor specimens under three conditions: (1) cerammed, (2) cerammed and shaded, and (3) sectioned to reveal internal material. Knoop hardness differences between groups were significant (P less than or equal to .05). The cerammed surface was the hardest; it was harder than human enamel. Shaded specimens had a surface hardness comparable to dental porcelain. However, the internal glass-ceramic material, located beneath the shading porcelain and cerammed surface, had a Knoop hardness slightly higher than that of human enamel.
使用Dicor相对于其他陶瓷材料的一个优势是，据报道其努氏硬度与人类牙釉质相当。然而，在制作牙科修复体时，由于加工、美学和功能要求，Dicor微晶玻璃铸件通常要经过几种不同的表面处理。因此，本研究比较了Dicor试样在三种条件下的努氏硬度：（1）烧结；（2）烧结并着色；（3）切片以显示内部材料。各组之间的努氏硬度差异显著（P≤0.05）。烧结表面最硬；它比人类牙釉质更硬。着色试样的表面硬度与牙科陶瓷相当。然而，位于着色瓷层和烧结表面下方的内部微晶玻璃材料的努氏硬度略高于人类牙釉质。
