高浓度H_(2)O_(2)浸泡联合不同时长超声处理核桩对纤维桩-树脂界面黏结强度的影响  

Effect of high-concentration H_(2)O_(2) immersion and ultrasonic treatment with different durations on interfacial bonding strength of fiber post and resin

作　　者：董毅 邓久鹏 范新昊 席光伟[4] Dong Yi;Deng Jiupeng;Fan Xinhao;Xi Guangwei(Cangzhou Stomatological Hospital,Cangzhou 061000,Hebei Province,China;School of Stomatology,North China University of Science and Technology,Tangshan 063000,Hebei Province,China;Department of Stomatology,Kailuan General Hospital,Tangshan 063000,Hebei Province,China;Department of Stomatology,Aerospace Central Hospital,Beijing 100049,China)

机构地区：[1]沧州口腔医院,河北省沧州市061000 [2]华北理工大学口腔医学院,河北省唐山市063000 [3]开滦总医院口腔科,河北省唐山市063000 [4]航天中心医院口腔科,北京市100049

出　　处：《中国组织工程研究》2021年第34期5453-5458,共6页Chinese Journal of Tissue Engineering Research

摘　　要：背景:采用H_(2)O_(2)直接浸泡纤维桩可增加纤维桩与复合树脂之间的黏结强度,但所需时间较长。目的:比较单纯H_(2)O_(2)处理或合并不同时长超声清洗核桩后对纤维桩-树脂界面黏结强度的影响。方法:取65支玻璃纤维预成根管桩,分为5组,每组13支:A组进行单纯硅烷化处理;B组浸泡于体积分数30%H_(2)O_(2)溶液15 min后进行硅烷化处理;C组浸泡于体积分数30%H_(2)O_(2)溶液同时进行超声荡洗2 min,最后行硅烷化处理;D组浸泡于体积分数30%H_(2)O_(2)溶液同时进行超声荡洗5 min,最后行硅烷化处理;E组浸泡于体积分数30%H_(2)O_(2)溶液同时进行超声荡洗15 min,最后行硅烷化处理,扫描电镜观察各组纤维桩表面形态。利用PP塑料吸管作为外部塑性支架,内部填充树脂黏结材料并插入处理后的纤维桩制成试件,应用金刚石砂轮机在每个纤维桩试件上切下1.5 mm厚度的3枚薄片,进行推出实验,解剖镜下观察薄片断裂情况。结果与结论:①扫描电镜显示,A组纤维桩表面较平滑,可见少量暴露于表面的断裂玻璃纤维;B组纤维桩表面较粗糙,大量浅层玻璃纤维暴露于表面并断裂,可见大量玻璃纤维断裂后遗留的凹槽,凹槽内部较为平滑;C组纤维桩表面较粗糙,可见少量断裂的玻璃纤维及遗留的凹槽,凹槽内部粗糙;D组纤维桩表面粗糙程度大于C组,可见大量断裂的玻璃纤维及遗留的凹槽,凹槽内部较粗糙;E组纤维桩表面粗糙程度与D组相仿,可见大量断裂的玻璃纤维及遗留的凹槽,凹槽内部较平滑;②推出实验结果显示,C组黏结强度大于A、B、E组(P<0.05),D组大于E组(P<0.05),其余组间比较差异无显著性意义(P>0.05);③C、D组的薄片断裂方式与A组比较差异有显著性意义(P<0.05);④结果表明,体积分数30%的H_(2)O_(2)联合超声波荡洗2 min处理纤维桩可以显著提高纤维桩-树脂界面的黏结强度。BACKGROUND:H_(2)O_(2) treatment had been proven to be effective for enhancing the bonding strength of fiber pile-resin,with a time-consuming process.OBJECTIVE:To compare the effects of pure H_(2)O_(2) treatment or combined with ultrasonic cleaning of core piles with different durations on the interfacial bonding strength of fiber post-resin.METHODS:Totally 65 glass fiber posts were randomly divided into five groups(n=13 per group):group A:pure silanization treatment;group B:immersed in 30%H_(2)O_(2) solution for 15 minutes and then received silanization;30%H_(2)O_(2) solution immersion with ultrasonic washing for 2 minutes(group C),5 minutes(group D)or 15 minutes(group E),respectively,then received silanization treatment.The surface roughness and fiber fracture of each specimen were observed by scanning electron microscope.The PP plastic straw was used as the external plastic support,filled with resin bonding material and inserted into the processed fiber post to make the test piece.Three slices with a thickness of 1.5 mm were cut from each fiber post specimen by diamond grinder,which was used to conduct wafer rush-out test,and the fracture of the slices was observed under anatomic microscope.RESULTS AND CONCLUSION:(1)Scanning electron microscope:Resin materials on the surface of the group A were evenly distributed,with smooth surface and rare fracture.In group B,surface was rough,and a lot of broken glass fibers were observed;a large number of grooves were left after glass fiber fracture,and the inner part of the groove was relatively smooth.In group C,the surface of the fiber post was rough,with a small amount of broken glass fiber and remaining grooves,and the grooves were rough inside.The surface roughness of fiber post was greater in group D than that of group C,and a large number of broken glass fibers and remaining grooves were observed.The inner roughness of the grooves was relatively rough.The surface roughness of the fiber post in group E was similar to that in group D;and there were a large number of b

关 键 词：材料 口腔 纤维桩 树脂 表面处理 黏结强度 过氧化氢 超声震荡 

分 类 号：R459.9[医药卫生—治疗学] R318.08[医药卫生—临床医学]