不同核材料与二氧化锆陶瓷树脂粘接耐久性的研究

Research on bond durability among different core materials and zirconia ceramic cemented by self-adhesive resin cements

目的研究不同类型核材料与二氧化锆陶瓷树脂间的粘接强度及耐久性。方法二氧化锆陶瓷盘经研磨后通过2种自粘接型树脂水门汀(Clearfil SA Luting和Rely X U100)与不同核材料包括流动型复合树脂核材料、充填型复合树脂、钴铬合金以及牙本质进行粘接,组成个8实验组。每个实验组再分成2个亚组,分别接受0、10 000次冷热循环后进行剪切粘接强度测试。结果核材料、树脂水门汀材料及老化条件均会对粘接强度产生明显影响(P<0.001)。冷热循环后,只有Clearfi l SA Luting与钴铬合金的粘接强度没有明显降低(P>0.05),并高于其余各核材料组(P<0.05);Clearfi l SA Luting与钴铬合金、流动型复合树脂核材料及充填型复合树脂间的粘接强度均明显高于Rely X U100相对应的粘接强度(P<0.05),而Clearfi l SA Luting和Rely X U100与牙本质间的粘接强度的差异无统计学意义(P>0.05)。结论不同类型核材料和树脂水门汀材料能够对二氧化锆陶瓷树脂粘接耐久性产生明显影响。

Objective This research estimated shear bond durability of zirconia and different substrates cemented by two self-adhesive resin cements （Clearfil SA Luting and RelyX U100） before and after aging conditioning. Methods Machined zirconia ceramic discs were cemented with four kinds of core material （cobalt-chromium alloy, flowable composite resin core material, packable composite resin, and dentin） with two self-adhesive resin cements （Clearfil SA Luting and RelyX U100）. All specimens were divided into eight test groups, and each test group was divided into two subgroups. Each subgroup was subjected to shear test before and after 10 000 thermal cycles. Results All factors （core materials, cements, and thermal cycle） significantly influenced bond durability of zirconia ceramic （P〈0.00 1）. After 10 000 thermal cycles, significant decrease was not observed in shear bond strength of cobalt-chromium alloy luted with Clearfil SA Luting （P〉0.05）; observed shear bond strength was significantly higher than those of other substrates （P〈0.05）. Significantly higher shear bond strength was noted in Clearfil SA Luting luted with cobalt-chromium alloy, flowable composite resin core material, and packable composite resin than that of RelyX U100 （P〈0.05）. However, significant difference was not observed in shear bond strength of dentin luted with Clearfil SA Luting and RelyX U100 （P〉0.05）. Conclusion Different core materials and self-adhesive resin cements can significantly affect bond durability of zirconia ceramic.