3种隔湿剂提高玻璃离子水门汀边缘封闭性的比较

Effect of three protective agents on edge closeness of glass ionomer cements

目的:观察凡士林、Cocoa butter、光亮漆3种隔湿剂对传统玻璃离子水门汀充填体边缘封闭性能的影响,为临床使用隔湿剂提供依据。方法:将80颗新鲜离体后牙备洞后,随机分为A、B组(各40颗牙),分别用GC Fuji Ⅸ型和上海产玻璃离子体水门汀充填窝洞。A、B2组又分4个亚组(3组为实验组,1组为对照组),分别用凡士林(A2/B2组)、Cocoa butter(A3/B3组)、光亮漆(A4/B4组)涂在充填体的表面,对照组(A1/B1)充填体表面不做任何处理。经冷热交替实验(5℃/55℃,循环30次),采用染料渗入法,在体视显微镜下观察并记录充填体与洞壁间染料的渗入情况。采用SPSS13.0软件包对数据进行等级分组资料多样本比较的秩和检验。结果:2种玻璃离子充填体在各组中均有微渗漏现象;各实验组的边缘微渗漏较对照组轻,有统计学意义(P<0.05);3个实验组之间均无显著差异(P>0.05)。结论:3种隔湿剂均可提高传统玻璃离子充填体与窝洞壁间的封闭性能。

PURPOSE： To observe the effect of three protective agents on edge closeness of glass ionomer cements filling in vitro. METHODS： Eighty freshly extracted human molars were randomly divided into A and B groups（40 molars each group）. The teeth cavities were prepared at 1/3 part to buccal gingiva of each molar and those of A group were filled with GC Fuji IX and those of B group with another glass ionomer cement. A and B groups were respectively divided into three experiment groups and one control group（A1/B1）. The filling surfaces of three experimental groups were separately coated with vaseline（A2/B2）, cocoa butter（A3/B3）, biscover（A4/B4）. After thermal cycling（×30, 5-55℃）, the depth of dye penetrating into the teeth was observed through an optical microscope. The data was analyzed with rating information on diverse groups of the rank and testing, using SPSS13.0 software package. RESULTS： Different dye penetration degrees were shown between filling material and cavity walls among each group, while the degrees of dye penetration of experimental groups were significantly slighter than those of corresponding control group （P〈0.05）, and there was no difference among experimental groups （P〉0.05）. CONCLUSION： The three protective agents can increase the edge closeness of glass ionomer cement filling.