纳米复合树脂粘合强度影响因素分析

Analysis of factors affecting adhesion strength of Nanocomposite resin

目的评估不同的表面处理方式和粘结剂的使用对纳米复合树脂修复材料粘合强度的影响。方法使用A2纳米复合树脂材料填充制备144例样品,根据抛光方式(P为单独抛光,A为抛光后给予空气摩擦)、硅烷偶联剂(CP硅烷偶联剂,MDP硅烷偶联剂)、粘结剂(H为疏水性粘结剂,U为通用粘结剂)的不同分为12组:AH组、ACH组、AMH组、AU组、ACU组、AMU组、PH组、PCH组、PMH组、PU组、PCU组、PMU组,每组12例。48h后所有标本接受微剪切力测验,并记录发生折裂时的负载强度,在光学纤维镜下分析折裂类型,所有数据均运用统计学软件分析。结果抛光后空气磨损样品除AH组外,修复粘合强度均高于单独抛光样品的各组(P<0.05)。在抛光后空气磨损样品中,ACH组粘合强度与仅用疏水性粘结剂处理的AH组相比,差异有统计学意义(P<0.05)。PH组具有最低的修复粘合强度(P<0.05)。复合材料修复中空气磨损样品中的大多数断裂是发生在粘结剂表面(P<0.05),大多数单独抛光样品中折裂类型是混合型(P<0.05)。在PH组超过80%的粘结剂断裂(P<0.05)。结论当抛光后使用氧化铝颗粒磨损可以增加纳米复合材料的修复粘合强度。单独抛光样品和疏水性粘结剂结合的粘合强度最低,是否使用MDP硅烷偶联剂在粘合强度上没有统计学意义。抛光后空气磨损样品中,单独使用通用粘结剂与任何硅烷和粘结剂组合同样有效。

Objective To evaluate the effects of different surface treatments,silane coupling agents and binders on the bonding strength of nanocomposite resin restorations.Methods A total of 144 samples were prepared by filling with A2 nanocomposite resin material,according to the polishing method[polishing alone(P),air friction after polishing(A)],and silane coupling agent(CP silane coupling agent,MDP silane coupling agent),the binder[hydrophobic binder(H),universal binder(U)]is divided into 12 groups,AH,ACH,AMH,AU,ACU,AMU,PH,PCH,PMH,PU,PCUand PMU group,12 cases in each group.After 48 h all specimens were subjected to a microshear test and the load intensity at the time of fracture was recorded.The fracture type was analyzed under optical fiber microscope.All data were analyzed using statistical software.Results After air polishing,the repair adhesive strength was higher than that of the polished samples except the AH group(P<0.05).In the air-worn samples after polishing,the difference was statistically significant(P<0.05)in the ACH group compared to the AH group treated with the hydrophobic binder only.The PH group had the lowest repair adhesive strength(P<0.05).Most of the fractures in the air-wear samples in the composite repair occurred on the surface of the adhesive(P<0.05),and most of the separately polished samples were of the mixed type(P<0.05).More than 80%of the adhesive broke in the PH group(P<0.05).Conclusion The use of alumina particles after polishing can increase the repair adhesive strength of nanocomposites.Separately polished samples and hydrophobic binders have the lowest bonding strength,Whether the MDP silane coupling agent was used was not statistically significant in terms of adhesive strength.In air-abrasive samples after polishing,the use of a universal adhesive alone is also effective in combination with any silane and binder.