脉冲Er:YAG激光和涡轮机对牙本质粘接界面的超微结构观察和抗剪切强度分析  

Evaluation of Shear Bond Strength and Bonding Interface on Dentin after Er:YAG Laser and Bur Preparation

作　　者：王琴琴[1] 李志韧[2] 张娜[2] 杨永进[2] 

机构地区：[1]辽宁医学院第二炮兵总医院研究生培养基地,北京100088 [2]第二炮兵总医院口腔科,北京100088

出　　处：《应用激光》2015年第5期612-617,共6页Applied Laser

摘　　要：目的:采用脉冲铒钇铝石榴石(Er:YAG)激光和涡轮机分别处理牙本质,使用不同粘接系统,比较两种方式对牙本质的粘接效果。方法:选取新鲜拔除的人下颌第三磨牙,按不同的处理方法和粘接系统随机分为5组。a:激光+自酸蚀;b:激光+磷酸+全酸蚀;c:激光+全酸蚀;d:涡轮机+自酸蚀;e:涡轮机+磷酸+全酸蚀。应用万能力学测试仪测其抗剪切强度,扫描电子显微镜观察其超微形态结构。结果:不同预备方法相比,a组与d组间抗剪切强度有明显差异(p<0.05,a>d),b组与e组间抗剪切强度无差异(p>0.05)。对于Er:YAG激光处理组,自酸蚀系统及酸蚀冲洗系统所得抗剪切强度值较高,分别为(16.94±2.96)MPa、(14.39±2.74)MPa;单独全酸系统所得抗剪切强度值最低为(9.44±1.89)MPa。结论:Er:YAG激光处理牙本质后其粘接效果不低于涡轮机组;Er:YAG激光处理牙本质后采用自酸蚀系统及磷酸+全酸蚀系统粘接效果均较好。Objective：This study aimed to compare bonding effects of different adhesive systems bonded to Er： YAG laser-or bur prepared dentin surfaces. Method： Freshly extracted human third molars were selected and randomly divided into five groups according to different preparation methods and bonding systems, a： Er： YAG laser ＋ self-etching adhesive; b：Er：YAG laser ＋ acid etching＋ total-etching adhesive; c ： Er ： YAG laser ＋ only total-etching adhesive; d ： bur＋ self-etching adhesive; e ： bur＋ acid etching＋ total-etching adhesive. Then a universal testing machine was used to measure shear bond strengths（SBS）, and a scanning electron microscopy was applied to observe the uhrastructures of bonding interfaces. Results： Comparing the shear bond strengths of groups with different preparation methods： There were significant differences in SBS values between group a and group d （p〈0.05 ,a〉d）, no significant differences between group b and group e （p〉0.05）. Among Er：YAG la- ser-prepared dentin groups, self-etching adhesive system （16. 94 ± 2. 96）and acid etching ＋ total-etching adhesive system （14.39±2.74）achieved higher SBS values（in MPa） ,and total-etching adhesive system（9.44±1.89） had the lowest SBS value. Conclusions：Bonding effect of Er=YAG laser-prepared dentin was not lower than bur-prepared. The self-etch adhesive system performed as well as the acid etch＋ total-etch adhesive system on bonding effects after Er： YAG laser preparation.

关 键 词：ER:YAG激光 涡轮机 超微形态结构 抗剪切强度 

分 类 号：R781.1[医药卫生—口腔医学] TN249[医药卫生—临床医学]