负压对多晶颗粒表面改性氧化锆与树脂粘接强度的影响  

Effect of subpressure on the bonding strength of resin to polycrystalline particulates modified zirconia ceramic

作　　者：唐爽 丁宁[1] 田月明[2] 张祖太[1] Tang Shuang;Ding Ning;Tian Yueming;Zhang Zutai(Institute of Dental Research,Capital Medical University School of Stomatology,Beijing 100050,China;Department of Prosthodontics,Capital Medical University School of Stomatology,Beijing 100050,China)

机构地区：[1]首都医科大学口腔医学院口腔医学研究所,100050 [2]首都医科大学口腔医学院修复科,100050

出　　处：《中华口腔医学杂志》2021年第4期342-348,共7页Chinese Journal of Stomatology

基　　金：国家自然科学基金(81371175,81671027)。

摘　　要：目的探讨负压对多晶颗粒表面改性氧化锆陶瓷与树脂粘接强度的影响。方法制备120个预烧结氧化锆圆片,用随机数字表法随机分成对照组和喷砂组以及30、50、70 s酸蚀组(每组24个)。对照组、喷砂组试件致密烧结前无额外处理;30、50、70 s酸蚀组分别浸入氢氟酸溶液30、50、70 s,再置于CaCl2溶液中90 s,80 ℃ NaOH溶液中浸泡2 h。5组试件致密烧结后,喷砂组喷砂,用扫描电镜观察5组试件表面形态,测试表面粗糙度。根据涂布粘接剂后是否施加负压,每组用随机数字表法随机分成两个亚组,负压亚组和常压亚组(每亚组12个)。将预制树脂柱粘接至氧化锆试件上,扫描电镜观察粘接试件纵断面(每亚组1个试件),测试剪切强度(每亚组11个试件),即粘接强度,并分析其破坏模式。结果对照组试件表面光滑,粗糙度为(0.24±0.11) μm,喷砂组试件喷砂处理后形成粗糙表面,粗糙度为(0.95±0.12) μm,30、50、70 s酸蚀组试件氧化锆表面产生多晶颗粒,随着酸蚀时间延长,试件表面多晶颗粒增加,粗糙度分别为(0.60±0.15)、(1.04±0.11)和(1.57±0.16) μm,各组粗糙度差异均有统计学意义(P<0.05)。对照组、喷砂组、30、50、70 s酸蚀组各负压亚组粘接强度分别为(13.56±1.19)、(20.98±2.11)、(17.37±2.44)、(24.19±2.97)和(21.36±2.16) MPa,分别比相应常压亚组[分别为(10.74±0.93)、(18.47±2.14)、(14.81±1.54)、(20.74±2.56)、(17.75±2.54) MPa]显著增加(P<0.05)。负压亚组粘接剂界面未见明显裂隙与气泡。各负压亚组粘接试件混合断裂模式比例比相应常压亚组显著提高(P<0.05)。结论负压可有效增强树脂与多晶颗粒改性的氧化锆陶瓷之间的粘接强度,改善粘接效果。Objective To explore the effect of subpressure on the bonding strength of resin to polycrystalline particulates modified zirconia ceramic.Methods One hundred and twenty pre-sintered zirconia discs were prepared and divided into the control group,the sandblasting group and the 30,50,70 s acid etching group(24 per group)by the random number table method.There was no additional treatment in the control group and sandblasting group before sinering.The 30,50,and 70 s acid etching groups were immersed in HF for 30,50,70 s,respectively,and then they were placed into CaCl2 solution for 90 s and dipped in NaOH solution at 80℃for 2 h.After sintering,the sandblasting group was subjected to sandblasting.The surface tomography and roughness were tested.According to whether subpressure was applied or not after the adhesives were applied,each group was randomly divided into two subgroups with a random number table:a subpressure subgroup and a normal pressure subgroup(12 per subgroup).Resin columns were bonded to these specimens.Shear bonding strength(SBS)test was conducted and the bonding interface,fracture surface and failure mode were analyzed.Results The surface of control group was smooth,and its roughness was(0.24±0.11)μm.The rough surface was formed after sandblasting in the sandblasting group,and its roughness was(0.95±0.12)μm.The surface roughness of 30,50,70 s acid etching groups[(0.60±0.15),(1.04±0.11),(1.57±0.16)μm]increased as the HF immersion time prolonged,and the difference in surface roughness of zirconia specimens among each group was statistically significant(P<0.05).The SBS values between zirconia and resin of all the subpressure subgroups,namely:the control group,the sandblasting group,and the 30,50,70 s acid etching group[(13.56±1.19),(20.98±2.11),(17.37±2.44),(24.19±2.97),(21.36±2.16)MPa]were significantly stronger than those in the normal pressure subgroups,namely:the control group,sandblasting group,30,50,70 s acid etching group[(10.74±0.93),(18.47±2.14),(14.81±1.54),(20.74±2.56),(17.7

关 键 词：义齿修复术 陶瓷制品 复合树脂类 负压 氧化锆 粘接强度 

分 类 号：R783.1[医药卫生—口腔医学]