Gurgan Sevil, Kiremitci Arlin, Cakir Filiz Yalcin, Yazici Esra, Gorucu Jale, Gutknecht Norbert
Department of Restorative Dentistry, School of Dentistry, Hacettepe University, Sihhiye, 06100, Ankara, Turkey.
Lasers Med Sci. 2009 Jan;24(1):117-22. doi: 10.1007/s10103-007-0532-0. Epub 2007 Dec 12.
The purpose of this study was to evaluate the dentin bond strength to resin composite following erbium:yttrium-aluminum-garnet (Er:YAG) laser preparation using different adhesive systems. Seventy dentin specimens prepared from human molar teeth were randomly assigned to seven groups of ten. The first five groups were prepared with an Er:YAG laser 2940 nm at the manufacturer's recommended settings and (1) acid etched, and etch-and-rinse adhesive Excite was applied; (2) Excite was applied; (3) two-step self-etching adhesive AdheSE was applied; (4) laser etched (120 mJ/10 Hz), and Excite was applied; (5) laser etched, and AdheSE was applied. The last two groups were added as controls (prepared with a diamond bur): (6) acid etched, and Excite was applied; (7) AdheSE was applied. Nanohybrid composite cylinders 4 mm x 2 mm were bonded to the dentin surfaces. After the specimens had been stored in distilled water and had undergone thermocycling, the shear bond strength was tested and the data were analyzed statistically. The Duncan multiple comparison test showed that specimens prepared with a diamond bur and with acid and Excite applied showed the highest mean bond strength (13.01 +/- 2.09 MPa), followed by those prepared with Er:YAG and with AdheSE applied (11.5 +/- 3.59 MPa) and those prepared with a diamond bur and with AdheSE applied (10.75 +/- 1.95 MPa), but there were no significant differences among them (P > 0.05). Er:YAG-prepared specimens, with acid, Excite (3.28 +/- 0.95 MPa) and specimens that were laser etched and with AdheSE applied (3.37 +/- 0.63 MPa) showed the lowest mean values for bond strength (P < 0.05). The results suggested that dentin surfaces prepared with Er:YAG laser may provide comparable composite resin bond strengths depending on the adhesives used.
本研究的目的是评估使用不同粘结系统时，铒钇铝石榴石（Er:YAG）激光预备后牙本质与树脂复合材料之间的粘结强度。从人类磨牙制备的70个牙本质标本被随机分为7组，每组10个。前五组使用波长2940 nm的Er:YAG激光按照制造商推荐的参数进行预备，并且：（1）进行酸蚀，然后应用酸蚀冲洗粘结剂Excite；（2）直接应用Excite；（3）应用两步自酸蚀粘结剂AdheSE；（4）激光蚀刻（120 mJ/10 Hz），然后应用Excite；（5）激光蚀刻，然后应用AdheSE。最后两组作为对照（用金刚砂车针预备）：（6）进行酸蚀，然后应用Excite；（7）应用AdheSE。将4 mm×2 mm的纳米混合复合树脂圆柱体粘结到牙本质表面。标本在蒸馏水中储存并经过热循环后，测试其剪切粘结强度，并对数据进行统计学分析。邓肯多重比较检验表明，用金刚砂车针预备并应用酸蚀和Excite的标本显示出最高的平均粘结强度（13.01±2.09 MPa），其次是用Er:YAG激光预备并应用AdheSE的标本（11.5±3.59 MPa）以及用金刚砂车针预备并应用AdheSE的标本（10.75±1.95 MPa），但它们之间没有显著差异（P>0.05）。用Er:YAG激光预备、进行酸蚀并应用Excite的标本（3.28±0.95 MPa）以及激光蚀刻并应用AdheSE的标本（3.37±0.63 MPa）显示出最低的粘结强度平均值（P<0.05）。结果表明，根据所使用的粘结剂，用Er:YAG激光预备的牙本质表面可能提供相当的复合树脂粘结强度。
