摘要
目的:比较牙本质经TREE牙齿美白胶漂白后,在不同时间粘接树脂的抗剪强度变化及粘接界面超微形态。方法:18颗恒前磨牙随机分为3组。A组:人工唾液内储存3周后制备牙本质粘接面,粘接树脂。B组:牙齿漂白3周后制备牙本质粘接面,粘接树脂;C组:牙齿漂白3周,人工唾液内储存2周后制备牙本质粘接面,粘接树脂。万能材料实验机测量抗剪强度;扫描电镜观察粘接界面超微形态。结果:抗剪强度:B组(10.74±3.03)MPa与A组(18.61±3.56)MPa及C组(17.21±3.15)MPa有明显差异(均为P<0.05),而A与C组无差异(P>0.05)。粘接界面超微形态:B组树脂突稀少,长度较短并且长短不一。A组与C组树脂突多,但C组树脂突较A组的短小。结论:牙齿经TREE牙齿美白胶漂白后即刻粘接树脂,会降低牙本质与树脂的粘接强度,延迟2周再粘接树脂能够恢复粘接强度。
Objective：To compare the shear bond strength of dentin to composite resin in different post-treatment time period after tooth bleaching with the TREE dental whitening gel and observe the dentin/composite interface of each group. Methods：Eighteen intact premolars were randomly divided into 3 groups （ n = 6） ： A： The specimens were immersed into artificial saliva for 3 weeks then adhesion without bleaching; B： Adhesion immediately after bleaching for 3 weeks, during bleaching the specimens were immersed into artificial saliva; C： Before adhesion the specimens immersed in artificial saliva for further 2 weeks after bleaching for 3 weeks. Five specimens from each group were randomly submitted to, shear bond strength test. The specimen remained in each group were sectioned to be observed by the scanning electron microscope. Results ： （ 1 ） The shear bond strength of the group B （ 10.74 ± 3. 03 ） MPa was significantly lower than that of the group A （ 18.61 ± 3.56） MPa or the group C （ 17.21 ± 3.15） MPa （P 〈0.05 ） ; No significant differences were found between the group C and the group A（ P 〉0.05 ） ; （2）The resin tags present in the dentin/composite interface was scarce for the group B, and that were shorter than the group A; The resin tags of the group A and group C were similar in number, but that of the group C was shorter than that of the group A. Conclusion ： The use of TREE whitening gel immediately before bonding significantly reduces bond strength, but immersion of bleached teeth in artificial saliva for 2 weeks before bonding results in a return to control bond strength.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2008年第6期815-818,共4页
Journal of Practical Stomatology
