Shinohara Mirela S, De Goes Mario F, Schneider Luis Felipe J, Ferracane Jack L, Pereira Patricia N R, Di Hipólito Vinícius, Nikaido Toru
Dental Materials Division, Department of Restorative Dentistry, Piracicaba School of Dentistry, State University of Campinas, Piracicaba, SP, Brazil.
Dent Mater. 2009 Nov;25(11):1383-91. doi: 10.1016/j.dental.2009.06.011. Epub 2009 Jul 30.
To evaluate (1) the influence of fluoride-containing adhesive on microtensile bond strength (microTBS) and (2) in vitro secondary caries inhibition at the resin-dentin interface after 24 h and 3 months water-storage and (3) the degree of conversion of different adhesives after 24h 1 month.
Flat surfaces of human teeth were ground and randomly assigned to six groups: (SBMP-24) Scotchbond Multi-Purpose control [SBMP], 24 h; (SE-24) SBMP etch and primer+Clearfil SE Bond adhesive [SE], 24h; (PB-24) SBMP etch and primer+Clearfil Protect Bond adhesive [PB], 24h; (SBMP-3) SBMP, 3 months; (SE-3) SBMP+SE, 3 months; and (PB-3) SBMP+PB, 3 months. To evaluate the effect of the adhesive resin alone, all teeth were etched with 35% phosphoric acid and primed with SBMP primer prior to applying the adhesive resin. Bonded assemblies were prepared for microTBS and stored in distilled water at 37 degrees C for 24h and 3 months. Sections of restored teeth of each group were exposed to an acid challenge. The specimens were sectioned, polished, and then observed with polarized light microscopy (PLM). Also, the degree of conversion (DC) of the adhesives was measured using Fourier Transform-Infrared spectroscopy (FTIR) at 24 h and 1 month, after polymerization.
microTBS values obtained in MPa (24h/3m) were: (MP) 61.5+/-10.5/52.9+/-8.9, (SE) 55.5+/-11.8/55.6+/-13, and (PB) 50.3+/-9.9/61.0+/-13.6. For interface analysis by PLM, an inhibition zone (IZ) adjacent to the hybrid layer was created only when the fluoride-containing adhesive (PB) was used. The DC in percentage (24 h, 1 month) were: (MP) 60.5+/-2.8/61.3+/-0.6, (SE) 69.6+/-1.3/70.7+/-0.05, and (PB) 53.1+/-0.4/58.3+/-1.6.
The fluoride-containing adhesive demonstrated significant increase of bond strength values after water-storage. This material was also able to create an acid inhibition zone in dentin. There was a significant increase of degree of conversion after 1 month only for PB.
评估（1）含氟黏结剂对微拉伸黏结强度（microTBS）的影响；（2）在水储存24小时和3个月后，树脂-牙本质界面处的体外继发龋抑制情况；（3）不同黏结剂在24小时和1个月后的转化率。
将人牙的平面打磨后随机分为六组：（SBMP-24）Scotchbond多用途对照品[SBMP]，24小时；（SE-24）SBMP酸蚀剂和底漆+Clearfil SE Bond黏结剂[SE]，24小时；（PB-24）SBMP酸蚀剂和底漆+Clearfil Protect Bond黏结剂[PB]，24小时；（SBMP-3）SBMP，3个月；（SE-3）SBMP+SE，3个月；以及（PB-3）SBMP+PB，3个月。为评估黏结树脂单独的效果，在应用黏结树脂之前，所有牙齿均用35%磷酸酸蚀并用SBMP底漆处理。制备用于微拉伸黏结强度测试的黏结组件，并在37℃蒸馏水中储存24小时和3个月。对每组修复后牙齿的切片进行酸蚀挑战。将标本切片、抛光，然后用偏光显微镜（PLM）观察。此外，在聚合后24小时和1个月，使用傅里叶变换红外光谱（FTIR）测量黏结剂的转化率（DC）。
以兆帕（MPa）为单位获得的微拉伸黏结强度值（24小时/3个月）为：（MP）61.5±10.5/52.9±8.9，（SE）55.5±11.8/55.6±13，以及（PB）50.3±9.9/61.0±13.6。对于通过偏光显微镜进行的界面分析，仅当使用含氟黏结剂（PB）时，在杂化层附近才形成抑制区（IZ）。转化率（24小时，1个月）的百分比为：（MP）60.5±2.8/61.3±0.6，（SE）69.6±1.3/70.7±0.05，以及（PB）53.1±0.4/58.3±1.6。
含氟黏结剂在水储存后显示出黏结强度值显著增加。这种材料还能够在牙本质中形成酸抑制区。仅PB在1个月后转化率有显著增加。
