抗坏血酸钠凝胶增强冷光美白术后牙釉质与复合树脂即刻粘接强度的实验研究  

Sodium ascorbate hydrogel improves shear bond strength of enamel to composite resin after cold-light bleaching:an in vitro study

作　　者：叶国[1] 李丛华[1] 杨霞[1] 向学熔[1] 

机构地区：[1]重庆医科大学附属口腔医院口腔内科教研室,重庆市口腔疾病与生物医学研究中心,重庆400015

出　　处：《第三军医大学学报》2012年第18期1905-1909,共5页Journal of Third Military Medical University

基　　金：重庆市卫生局医学科研项目(2010-2-225);重庆市卫生局中医药科研计划项目(2010-2-67)~~

摘　　要：目的通过Beyond诊室冷光美白术后即刻应用不同浓度、不同作用时间的抗坏血酸钠凝胶对釉质/复合树脂粘接强度的影响分析,确定恢复即刻粘接强度所需的最佳浓度及作用时间。方法将80个前磨牙釉面试件按随机数字表法分为8组(A:直接树脂修复;B:Beyond诊室冷光美白后直接树脂修复;C1～C3/D1～D3:Beyond诊室冷光美白术后分别应用10%和20%抗坏血酸钠凝胶作用30、60 min和180 min,再行树脂修复,n=10),分别对各组标本进行抗剪切粘接强度测试(shear bond strength,SBS)和断裂面黏接剂残留指数分析(adhesive remnant index,ARI),确定最佳浓度及作用时间。结果 SBS测试:B组SBS值明显低于A组(P<0.05),C1～C3/D1～D3逐渐上升,C2、3/D2、3组与B组及C1/D1组比较有统计学差异(P<0.05),但C2与C3、D2与D3、C2与D2、C3与D3之间则无统计学差异;ARI值分析:A组与其余各组均有统计学差异(P<0.05)。结论 Beyond诊室冷光美白术后应用10%抗坏血酸钠凝胶60 min可明显恢复釉质与复合树脂的粘接强度。Objective To determine the effect of sodium ascorbate hydrogel on the shear bond strength of enamel to composite resin after Beyond cold-light bleaching. Methods According to random number table, 80 specimens were divided into 8 groups （A： no bleaching; B： bleaching, no sodium ascorbate hydrogel; C1- 3/D1-3 ： bleaching and application of 10%/20% sodium ascorbate hydrogel for 30, 60, and 180 min, respectively, n = 10）. Specimens were bonded with a total etch bonding system and composite resin. They were tested for shear bond strength （SBS）. Adhesive remnant index （ARI） were analyzed for optimal concentration of sodi- um ascorbate hydrogel and reaction time. Results SBS of group B were significantly lower than the un- bleached group （group A, P 〈 0. 05）. Sodium ascorbate hydrogel application following bleaching increased the resin-enamel bond strength. There were obvious differences between C2, 3/D2, 3 and B/C1/D1 （P 〈0. 05 ） , while there was no statistic significance between C2 and C3, D2 and D3, C2 and D2, and C3 and D3 （P 〉 O. 05 ）. While in ARI test, there were obvious difference between group A and the other groups （ P 〈 0. 05 ）. Gonclusion Shear bond strength of enamel to composite resin after Beyond cold-light bleaching could be en- hanced obviously with the annlication of 10% sodium ascorbate hydrogel for 60 min.

关 键 词：抗坏血酸钠凝胶 Beyond诊室冷光美白 抗剪切黏接强度 粘接剂残留指数分析 

分 类 号：R781.05[医药卫生—口腔医学] R783.1[医药卫生—临床医学]