表面硅涂层改性对氧化锆陶瓷与树脂水门汀粘结强度的影响

Effect of Surface Modification with Different Thickness and Concentration on Shear Bonding Strength of Dental Zirconia Ceramics

目的:研究不同浓度和不同厚度硅涂层对Lava氧化锆陶瓷与树脂水门汀粘结强度的影响。方法:制作Lava氧化锆长方体状陶瓷试样共81件(10mm×10mm×3mm),按20%、30%、40%3种硅涂层浓度及100nm、200nm、300nm 3种硅涂层厚度分为A、B、C、D、E、F、G、H、I共9组(n=9)对氧化锆陶瓷粘结面进行处理,然后将每组试样与Panavia F树脂水门汀粘结,万能材料试验机测试剪切粘结强度,对结果进行统计分析。结果:A组到I组各组剪切粘结强度值(MPa)分别为3.09±0.20、3.27±0.22、3.30±0.38、3.17±0.25、5.35±0.39、4.09±0.29、3.16±0.29、3.24±0.23和4.01±0.28。不同厚度的硅涂层各组间粘结剪切强度差异具有统计学意义(P<0.05),不同浓度硅涂层各组间粘结剪切强度差异具有统计学意义(P<0.05),浓度和厚度之间存在交互效应(P<0.05),30%浓度200nm厚度硅涂层获得的剪切粘结强度值最大。结论:硅涂层浓度和厚度对氧化锆与树脂水门汀剪切粘结强度存在交互效应,30%浓度涂抹200nm厚度的硅涂层为较适宜的浓度和厚度,可明显提高氧化锆陶瓷与树脂水门汀剪切粘结强度。

Objective： To evaluate the effects of surface modification with three different thickness and concentration on the shear bonding strength between dental zirconia ceramics and resin cement. Methods： Silica coating was prepared by colloidal silica gel with thickness of 100nm, 200nm, 300nm and with concentration of 20 %, 30%, 40% on dental zirconia ceramic. 81 discs were fabricated and randomly divided into nine groups（n= 9） respectively after polishing and sandblasting. The ceramic surfaces of different group were received different treatments. Each ceramic block was bonded to light curing composite resin. All samples were stored in distilled water at 37 degrees for 24h before to measure the shear bonding strength of the resin cement to the ceramic surface. Results： The shear bonding strengths（MPa） form A to I were 3.09±0.20,3.27±0.22,3. 30±0.38,3.17±0.25,5.35±0.39,4. 09±0.29,3. 16 % 0.29,3.24 % 0.23 and 4.01 - 0.28 respectively. There was significant difference among different thickness of the silica coating（P〈0.05）, and significant difference among different concentration of the silica coating（P〈0. 05） ,there was the effects of interaction between the thickness and the concentration of the silica coating（P〈0.05）, 30%/00 and 200nm silica coating gained the highest shear bonding strength. Conclusion： Different concentration and different thickness of silicon coating has certainly influenced the shear bonding strength between the zirconia ceram- ics and resin cement. 30%% and 200 nm silicon coating is more appropriate for the dental zirconia ceramics, which can obviously improve the shear bonding strength between the zirconia ceramics and resin cement.