Follak A C, Miotti L L, Lenzi T L, Rocha R O, Soares F Z
Oper Dent. 2018 Mar/Apr;43(2):E92-E101. doi: 10.2341/17-129-L.
The purpose of this study was to evaluate the influence of water storage on bond strength of multimode adhesive systems to artificially induced caries-affected dentin. One hundred twelve sound bovine incisors were randomly assigned to 16 groups (n=7) according to the dentin condition (sound; SND, artificially induced caries-affected dentin; CAD, cariogenic challenge by pH cycling for 14 days); the adhesive system (SU, Scotchbond Universal Adhesive; AB, All-Bond Universal; PB, Prime & Bond Elect; SB, Adper Single Bond 2; and CS, Clearfil SE Bond), and the etching strategy (etch-and-rinse and self-etch). All adhesive systems were applied under manufacturer's instructions to flat dentin surfaces, and a composite block was built up on each dentin surface. After 24 hours of water storage, the specimens were sectioned into stick-shaped specimens (0.8 mm) and submitted to a microtensile test immediately (24 hours) or after six months of water storage. Bond strength data (MPa) were analyzed using three-way repeated-measures analysis of variance and post hoc Tukey test (α=5%), considering each substrate separately (SND and CAD). The etching strategy did not influence the bond strength of multimode adhesives, irrespective of the dentin condition. Water storage only reduced significantly the bond strength to CAD. The degradation of bond strength due to water storage was more pronounced in CAD, regardless of the etching strategy.
本研究的目的是评估水储存对多模式粘结系统与人工诱导的龋损牙本质粘结强度的影响。112颗健康牛切牙根据牙本质状况（健康；SND，人工诱导的龋损牙本质；CAD，通过pH循环14天进行致龋挑战）、粘结系统（SU，Scotchbond通用粘结剂；AB，全粘结通用粘结剂；PB，Prime & Bond Elect；SB，Adper单键2；CS，Clearfil SE Bond）和酸蚀策略（酸蚀冲洗和自酸蚀）随机分为16组（n = 7）。所有粘结系统均按照制造商的说明应用于平坦的牙本质表面，并在每个牙本质表面构建复合块。水储存24小时后，将标本切成棒状标本（0.8毫米），并立即（24小时）或水储存六个月后进行微拉伸试验。粘结强度数据（MPa）采用三因素重复测量方差分析和事后Tukey检验（α = 5%）进行分析，分别考虑每种底物（SND和CAD）。无论牙本质状况如何，酸蚀策略均不影响多模式粘结剂的粘结强度。水储存仅显著降低了与CAD的粘结强度。无论酸蚀策略如何，水储存导致的粘结强度降解在CAD中更为明显。
