不同瓷表面处理剂对树脂-遮色瓷结合强度的影响

Effects of Different Surface Conditioning Agents on the Bond Strength of Resin-Opaque Porcelain Composite

为比较不同表面处理剂对树脂-遮色瓷结合强度的影响,制作表面烤制有遮色瓷的金属基底5组,瓷表面酸蚀后,其中4组分别涂布RelyX Ceramic Primer(RCP)、Porcelain Bond Activator(与SE Bond Primer 1∶1混合使用)(PBA)、Shofu Porcelain Primer(SPP)、SE Bond Primer(SEP)四种表面处理剂,剩余一组作为空白对照。将5组试件与树脂粘接后测剪切强度,并分析、观察断裂模式。结果显示,所有实验组粘接强度均高于对照组;PBA组的粘接强度最高[(37.52±2.14)MPa],组内试件多为混合破坏(金瓷断裂和遮色瓷内聚断裂);SPP、RCP组高于SEP组(P<0.05),组内试件多为混合破坏(粘接界面断裂和遮色瓷或树脂内聚断裂);SEP组和对照组内试件多为粘接破坏。因此,表面处理剂可提高遮色瓷与牙科复合树脂的粘接强度,二者粘接强度满足临床要求。

The objective of this research is to evaluate the effects of different silane coupling agents on the bond strength between Ceramco3 opaque porcelain and indirect composite resin. Five groups of Co-Cr metal alloy sub- strates were fabricated according to manufacturer＇s instruction. The surface of metal alloy with a layer of dental o- paque porcelain was heated by fire. After the surface of opaque porcelain was etched, five different surface treat- ments, i.e. RelyX Ceramic Primer （RCP）, Porcelain Bond Activator and SE Bond Primer （mixed with a proportion of 1：1） （PBA）, Shofu Porcelain Primer （SPP）, SE bond primer （SEP）, and no primer treatment （as a control group）, were used to combine P60 and opaque porcelain along with resin cement. Shear bond strength of specimens was tested in a universal testing machine. The failure modes of specimens in all groups were observed and classified into four types. Selected specimens were subjected to scanning electron microscope and energy disperse spectroscopy to reveal the relief of the fracture surface and to confirm the failure mode of different types. The experimental results showed that the values of the tested items in all the tested groups were higher than that in the control group. Group PBA exhibited the highest value [-（37.52±2.14） MPa] and this suggested a fact that all of the specimens in group PBA revealed combined failures （failure occurred in metal-porcelain combined surface and within opaque porcelain）. Group SPP and RCP showed higher values than SEP （P〈0.05） and most specimens of SPP and RCP performed combined failures （failure occurred in bond surface and within opaque porcelain or composite resin） while all the specimens in group SEP and control group revealed adhesive failures. Conclusions could be drawn that silane coupling agents could reinforce the bond strength of dental composite resin to metal-opaque porcelain substrate. The bond strength between dental composite resin and dental opaque porcelain could meet the clinical requirements.