【作者】 徐艺；

【导师】 黄慧； 顾晓宇； 黄庆丰； 赵军； 郝轶；

【作者基本信息】 上海交通大学 ， 口腔临床医学（口腔修复学）， 2017， 硕士

【摘要】 目的:比较氧化锆陶瓷表面处理剂中HEMA的含量对氧化锆陶瓷与树脂水门汀即刻粘接强度和老化后粘接强度的影响,以期得到最优HEMA的浓度区间,为临床氧化锆陶瓷修复体的粘接提供指导。方法:氧化锆瓷块切割成12mm×10mm×10mm的长方体16个,高温烧结后随机分成2组,分别为即刻组和老化组,每组分为四个亚组(A、B、C、D和A1、B1、C1、D1),表面喷砂清洁后分别涂抹0%、7%、14%HEMA和ZPP表面处理剂,并在每个面中心堆直径为2mm的树脂核。即刻组置于37℃蒸馏水中静置24h,老化组冷热循环10000次。使用万能测试仪进行剪切实验,测得剪切粘接强度。体式显微镜和扫描电子显微镜观察断裂模式和断裂面形貌;结果采用SPSS 19.0软件进行统计分析,P<0.05为差异有统计学意义。结果:冷热循环前,C组剪切粘接强度最大,为24.01±5.56 MPa,B组的剪切粘接强度最小,为18.13±6.81 MPa,A、D组位于两者之间。A组与C组、B组与C组之间P均小于0.05,差异有统计学意义。冷热循环后,各组剪切粘接强度均下降50~60%,其中C1组下降最多,A组下降最少。各组老化前后差异均有统计学意义,而老化组内各组之间无统计学差异。结论:在本实验的条件下,随着氧化锆陶瓷表面处理剂中HEMA浓度的增加,氧化锆陶瓷与树脂水门汀之间的即刻粘接强度增加;冷热循环后,氧化锆陶瓷与树脂水门汀间的剪切粘接强度明显下降,高浓度HEMA组下降最多。但是各实验组与对照组之间无明显差异。更多还原

【Abstract】 Objective: Comparing the different concentration of HEMA in treatment agents to analyze the difference of the immediate bonding strength and strength after aging between Zirconium oxide and resin in order to get the optimal range of HEMA concentration to serve the clinic.Methods: Cut the porcelain pieces without sintered into 16 cuboids(12mm×10mm×10mm)and then sinter those cuboids.The specimens were divided to 2 groups(immediate group and aging group)randomly,and then those in each group were divided into 4 subgroups.Each four surfaces of the cuboid were treated with the sand blast and surface treatment agent with 0%、7%、14% HEMA and ZPP,and then one resin core of 2mm diameter were made in the center of the surface.Specimens in immediate group were put into the distilled water of 37 degrees for 24 hours.Specimens in aging group were put into the thermal cycling machine,cycled for 10000 times.Easy test machine was used to do the shearing test and get the shearing strength.Using Stereo Microscope of 50 times to observe the failure modes and appearance of the fracture surface Results: Before the thermal cycling,group C had the highest shearing bonding strength of 24.01± 5.56 MPa and group B had the lowest strength of the bonding strength of 18.13±6.81 MPa,the strength of group A and D were between group C and B.The P value between group A and C,B and C were 0.017 and 0.012 separately,and both were less than 0.05 and were statistically significant.After the thermal cycling,shearing bonding strength of all groups were decreased by 50%-60%.Group C dropped the most and group A dropped the least.There were no significance within aging groups,while there were significance between immediate and aging group.Conclusions: In this experiment,The higher the concentration of HEMA is,the strongest the immediate bonding strength between Zirconium oxide ceramic and resin cements are.更多还原