Hardening of new resin cements cured through a ceramic inlay.
Hardening of new resin cements cured through a ceramic inlay.
复制标题
通过陶瓷镶嵌物固化的新树脂水泥硬化。
作者：
O. El;M. H. Rubo;W. El
这项研究调查了仅通过自固化和通过双固化一组八种新型树脂基水泥所实现的硬化程度。此外，还测定了陶瓷嵌体厚度对水泥硬度的影响。盘状标本直径6 mm，厚2.5 mm，由粘固剂、Choice、Duolink、Enforce、Lute-It、Nexus、Resinmer和Variolink八种粘固剂制成。从每种材料中制备8个样品；一半是自固化的，其余的是双重固化的。然后以1小时、1天和1周为间隔进行努氏硬度测量。此外，从每个水泥中制备12个相同尺寸的试件，并通过不同厚度(1-6 mm)的陶瓷间隔层进行双固化。硬度测量如上所述。方差分析显示，所有水泥的自固化和双固化试件的硬度有显著差异(P<；0.0001)。通过厚度为2-3 mm或更厚的陶瓷间隔层进行双重固化的试件的硬度也与没有间隔层的双重固化试件的硬度有显着差异。结果表明，对于某些材料，单纯的自固化不足以达到足够的硬化效果；当陶瓷嵌体厚度为2~3 mm或更大时，水泥的硬度明显降低。
This study investigated the degree of hardening achieved through self-curing only and through dual-curing a group of eight new resin-based cements. In addition, the effect of ceramic inlay thickness on cement hardness was determined. Disk specimens measuring 6 mm in diameter and 2.5 mm thick were prepared from eight cements: Adherence, Choice, Duolink, Enforce, Lute-It, Nexus, Resinomer, and Variolink. Eight specimens were prepared from each material; half were self-cured, while the remainder were dual-cured. Knoop hardness measurements were then made at 1-hour, 1-day, and 1-week intervals. In addition 12 specimens of the same dimensions were prepared from each cement and were dual-cured through ceramic spacers of varying thickness (1-6 mm). Hardness measurements were made as above. ANOVA showed significant differences in hardness of self-cured versus dual-cured specimens for all cements (P < 0.0001). Significant differences were also found in the hardness of specimens dual-cured through ceramic spacers 2-3 mm in thickness or more compared with those that were dual-cured without spacer. It is concluded that for some materials self-curing alone was not adequate to achieve sufficient hardening; cement hardness was significantly reduced when ceramic inlay thickness was 2-3 mm or more.