Chinelatti Michelle Alexandra, Santos Egle Leitão, Tirapelli Camila, Pires-de-Souza Fernanda Carvalho Panzeri
Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Av. do Café s/n, Monte Alegre, Ribeirão Preto, São Paulo 14040-904, Brazil.
Dent J (Basel). 2019 Apr 1;7(2):35. doi: 10.3390/dj7020035.
Restorative procedures associated with bioglasses have shown to be a strategy to satisfy the contemporary concept of minimally invasive dentistry. Thus, the aim of this study was to evaluate bond strength to dentin treated by two different methods of biosilicate microparticle application. Dentin surfaces from 30 sound human molars were exposed and randomly assigned into three groups ( = 10) according to the surface treatment: (1) blasting with biosilicate microparticles (distance = 1 cm/pressure = 5 bar/time = 1 min); (2) 10% biosilicate microparticles paste; and (3) control (no treatment). After, dentin surfaces were restored with self-etch adhesive (Adper Easy Bond) and nanofilled composite (Filtek Z350). Specimens were sectioned perpendicularly to the adhesive interface to obtain sticks (cross-section area = 1 mm²), which were submitted to microtensile test (0.5 mm/min; 50 kgf). Data were analyzed by ANOVA and Tukey's test (α = 5%). Dentin/adhesive interfaces were morphologically analyzed by scanning electron microscopy (SEM). Data analysis showed that biosilicate-treated groups reached similar results ( > 0.05) and both of them demonstrated higher values ( < 0.05) than control group. SEM micrographs revealed hybridization with clear resin tags and no separation between resin-dentin adhesive interfaces. Within the limitations of this study, surface treatment with biosilicate positively influenced the adhesion to dentin and does not alter the morphology of the adhesive interface.
与生物玻璃相关的修复程序已被证明是一种满足当代微创牙科概念的策略。因此，本研究的目的是评估通过两种不同的生物硅酸盐微粒应用方法处理的牙本质的粘结强度。从30颗健康人磨牙上暴露牙本质表面，并根据表面处理方法将其随机分为三组（每组n = 10）：（1）用生物硅酸盐微粒喷砂（距离 = 1 cm/压力 = 5 bar/时间 = 1分钟）；（2）10%生物硅酸盐微粒糊剂；（3）对照组（不处理）。之后，用自酸蚀粘结剂（Adper Easy Bond）和纳米填充复合树脂（Filtek Z350）修复牙本质表面。将标本垂直于粘结界面切片以获得小条（横截面积 = 1 mm²），并进行微拉伸试验（0.5 mm/分钟；50 kgf）。数据通过方差分析和Tukey检验进行分析（α = 5%）。通过扫描电子显微镜（SEM）对牙本质/粘结剂界面进行形态学分析。数据分析表明，生物硅酸盐处理组达到了相似的结果（P > 0.05），并且它们两者都显示出比对照组更高的值（P < 0.05）。SEM显微照片显示有清晰的树脂突形成的混合层，并且树脂 - 牙本质粘结界面之间没有分离。在本研究的局限性范围内，生物硅酸盐表面处理对牙本质的粘结有积极影响，并且不会改变粘结界面的形态。
