摘要
目的探讨不同表面处理方式对丙烯酸树脂表面性状和粘接强度的影响。方法制备硅橡胶与丙烯酸树脂构成的重叠联合模型。根据树脂条的不同表面处理方式,将模型随机分为4组:对照组、MMA浸润组、喷砂组、MMA浸润+喷砂组。用扫描电镜观察各组树脂处理后的表面形态变化,用粗糙度仪检测其粗糙度,万能材料试验机测定树脂条和硅橡胶之间的粘接强度。结果 1.电镜观察显示,未经处理的树脂条表面打磨痕迹明显,经过MMA浸润后,表面出现溶解的痕迹,经过喷砂后,表面粗糙凸凹不平;2.粗糙度:喷砂组(3.12±0.02)μm和MMA浸润+喷砂组(3.11±0.01)μm>对照组(0.73±0.01)μm和MMA浸润组(0.71±0.01)μm,且差异有统计学意义(P<0.05);3.粘接强度:MMA浸润+喷砂组(2.34±0.03)MPa>喷砂组(2.02±0.01)MPa>MMA浸润组(1.81±0.02)MPa>对照组(1.50±0.01)MPa,且差异有统计学意义(P<0.05)。结论 MMA单体浸润与喷砂的处理方式可以使丙烯酸树脂表面的形貌发生变化,更有利于硅橡胶与丙烯酸树脂的结合,获到良好的粘接效果,可在临床推广使用。
ObjectiveTo study the influence of four kinds of resin surface treatment methods on the surface properties and bonding strength of acrylic resin.MethodsFirst, the silicone rubber /acrylic resin overlap joint model was prepared. Acrylic resin were randomly divided into 4 groups： control group, MMA group, Sandblasting group, MMA infiltration ＋ sandblasting group. The change of surface properties of each resin was observed by scan electron microscope （SEM）. The roughness of each group was measured by Hommel W5 portable roughness instrument. The bonding strength between resin and silicone rubber of each group was detected by a universal material testing machine.Results（1） SEM results showed that untreated resin surface had obvious grinding traces, and the trace was dissolved after the infiltration of MMA, and the surface was rough and uneven after sandblasting. （2） The roughness was as follows： the sandblasting group（3.12±0.02）, MMA infiltration ＋ sandblasting group（3.11±0.01） 〉the control group（0.73±0.01）, MMA infiltration group（0.71±0.01）. The difference was statistically significant （P 〈 0.05）. （3） The bonding strength was as follows： MMA infiltration ＋ sandblasting group（2.34±0.03） 〉 sandblasting group（2.02±0.01） 〉MMA infiltration group（1.81±0.02） 〉 control group（1.50±0.01）. The difference was statistically significant （P〈 0.05）.ConclusionMMA monomer＆amp;nbsp;infiltration made the sand surface of acrylic resin produced different surface morphology, and thus improved the bonding between silicone rubber and acrylic resin, indicating it can be used widely in clinical.
出处
《口腔材料器械杂志》
2015年第2期84-87,共4页
Chinese Journal of Dental Materials and Devices
关键词
丙烯酸树脂
喷砂
MMA浸润
表面性状
粘接强度
粗糙度
Acrylic resin
Sandblasting
MMA infiltration
Surface properties
Bonding strength
Roughness
