Chan K C, Swift E J
Department of Operative Dentistry, University of Iowa, College of Dentistry, Iowa City.
J Prosthet Dent. 1991 Jun;65(6):790-2. doi: 10.1016/s0022-3913(05)80014-9.
This study investigated the sealing properties of Cavalite light-activated base material in conjunction with various dentin bonding agents. Thirty extracted molars were selected and cleaned. Slot preparations with standard dimensions were made. The prepared cavities were filled with Cavalite material after application of the dentin bonding agents Gluma, Prisma Universal Bond, Scotchbond 2, and Tenure. Samples were thermocycled for 180 cycles between 3 degrees C and 60 degrees C, then immersed in 0.05% crystal violet solution for 2 hours. The samples were embedded in clear casting resin, sectioned, and examined with a light microscope. Results indicated that Cavalite material used alone, without a dentin bonding agent, allowed the greatest degree of dye penetration. Cavalite material with Tenure bonding agent had the lowest degree of leakage. Cavalite material used with Scotchbond 2, Gluma, or Prisma Universal Bond bonding agents allowed an intermediate degree of dye penetration. According to an analysis of variance, however, there was no statistical difference in the effects of Tenure, Scotchbond 2, and Gluma bonding agents.
本研究调查了Cavalite光固化基底材料与各种牙本质粘结剂结合时的封闭性能。选取30颗拔除的磨牙并进行清洁。制备具有标准尺寸的槽形洞。在应用牙本质粘结剂Gluma、Prisma Universal Bond、Scotchbond 2和Tenure后，用Cavalite材料填充制备好的窝洞。将样本在3摄氏度和60摄氏度之间进行180次热循环，然后浸入0.05%的结晶紫溶液中2小时。将样本嵌入透明浇铸树脂中，切片并用光学显微镜检查。结果表明，单独使用Cavalite材料（不使用牙本质粘结剂）时染料渗透程度最大。使用Tenure粘结剂的Cavalite材料渗漏程度最低。与Scotchbond 2、Gluma或Prisma Universal Bond粘结剂一起使用的Cavalite材料允许中等程度的染料渗透。然而，根据方差分析，Tenure、Scotchbond 2和Gluma粘结剂的效果没有统计学差异。
