甲基丙烯酰氧基丙基三甲氧基硅烷对3种不同金属与Filtek树脂粘接强度的影响

The influence of methacryloxy propyl trimethoxyl silane on shear bond strength of three kinds metal and Filtek resin

目的研究经甲基丙烯酰氧基丙基三甲氧基硅烷(γ-MPS)偶联剂处理的3种不同金属的粘接表面对FiltekZ350树脂粘接强度的影响。方法用失蜡铸造法制备镍铬合金、纯钛、金钯合金试件各12个,共36个。每种金属随机平分为实验组和对照组,每组6个。实验组用γ-MPS对粘接面进行处理后与Filtek Z350树脂粘接,对照组粘接面不用γ-MPS处理。测试每组试件断裂时的剪切力,并用扫描电子显微镜(SEM)观察试件断面的形貌。结果镍铬合金实验组、纯钛实验组较相应对照组的剪切强度高,差异有统计学意义(P<0.001);金钯合金实验组与其对照组的剪切强度无明显差异(P>0.05)。实验组内比较:纯钛组剪切强度高于镍铬合金组,两者又均高于金钯合金组(P<0.01)。所有试件均为黏结断裂。与对照组相比,镍铬合金和纯钛实验组断裂面有较多的树脂突,而金钯合金实验组断裂面树脂突较少。结论γ-MPS可以提高金属和树脂的粘接力,但和金属成分有关。γ-MPS能增加纯钛、镍铬合金与树脂的粘接性能,但不能认为γ-MPS可以增加金钯合金与树脂的粘接性能。

Objective To study the influence of three different metal alloy surfaces treated with primer methacry- loxy propyl trimethoxyl silane （γ-MPS） coupling agent on the bond strength of Filtek Z350 resin. Methods Total 36 specimens of nickel-chromium （Ni-Cr） alloy, pure titanium （Ti） and aurum-palladium （Au-Pd） alloy, each of 12 pieces produced by lost wax casting method, were divided into 6 groups. After treated with γ-MPS on the bonding surface, experimental group samples were adhered to Fihek Z350 resin, then compared with the surface without γ-MPS treat- ment. The tensile and shear strength of each group tested and the fracture sections were observed with scanning elec- tron microscope （SEM）. Results Comparing the Ni-Cr alloy and pure Ti experimental group with them in control group, the shearing strength of the experimental group was higher, and the differences were significant （P〈0.001）. The shearing strength of the experimental group and control group of Au-Pd alloy were not significant （P〈0.05）. Comparing the experimental groups, the shearing strength of pure Ti was higher than Ni-Cr alloy, both were higher than Au-Pd alloy（P〈0.01）. These entire specimens were adhesive fracture. Comparing with the control group, Ni-Cr alloy and pure Ti experimental group showed more resin juts in the fracture surface, while the Au-Pd alloy in experimental group showed less resin juts. Conclusion γ-MPS can enhance the adhesion between metal and resin, but it is also related to the metal composition. γ-MPS can significantly increase the bond strength of resin and Ti or Ni-Cr alloy, but not the case of Au-Pd alloy and resin.