Chan K C, Swift E J
Department of Operative Dentistry, University of Iowa, College of Dentistry, Iowa City.
J Prosthet Dent. 1989 Oct;62(4):408-11. doi: 10.1016/0022-3913(89)90171-6.
This study investigated the sealing properties of chemical and light-cured basing materials in dentin. Fifty extracted molars were selected and cleaned. Slot preparations with standard dimensions were made. The prepared cavities were filled with Cavitec, Life, Ketac-Bond, VLC Dycal, and Cavalite materials. Samples were immersed in 0.05% crystal violet solution for 2 hours. The samples were then embedded in clear casting resin, sectioned, and examined with a microscope. Results indicated that Cavalite and Ketac-Bond materials allow a greater degree of dye penetration that the three other materials. Cavitec, VLC Dycal, and Life materials were similar to each other in degree of dye penetration.
本研究调查了化学固化和光固化垫底材料在牙本质中的封闭性能。选取50颗拔除的磨牙并进行清洁。制备具有标准尺寸的槽形洞。将制备好的窝洞用Cavitec、Life、Ketac-Bond、VLC Dycal和Cavalite材料填充。将样本浸入0.05%的结晶紫溶液中2小时。然后将样本包埋在透明浇铸树脂中，切片并用显微镜检查。结果表明，Cavalite和Ketac-Bond材料比其他三种材料允许更大程度的染料渗透。Cavitec、VLC Dycal和Life材料在染料渗透程度上彼此相似。
