Fallahzadeh Farnoosh, Safarzadeh-Khosroshahi Shadab, Atai Mohammad
Assistant Professor of Operative Dentistry, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Professor, Department of Polymer Science, Iran Polymer and Petrochemical Institute (IPPI), Tehran, Iran.
J Clin Exp Dent. 2017 Jun 1;9(6):e738-e742. doi: 10.4317/jced.53722. eCollection 2017 Jun.
The study aims to investigate the effect of incorporation of sepiolite nanoparticles on the microtensile bond strength of an experimental dentin bonding to the human dentin.
The sepiolite nanoparticles were incorporated into an experimental methacrylate-based dentin bonding system in concentrations of 0.0, 0.2, 1.0, 2.0, and 5.0 weight percents. The specimens were then ultrasonicated to finely disperse the nanoparticles in the adhesive matrix. The coronal enamel of 30 intact human premolars was cut to expose dentin. Having etched, rinsed, and blot dried the experimental bonding agents were applied to dentin surface. Adper Single Bond was used as control group according to the manufactor's instruction. Then all the teeth were built up by composite and sectioned in stick form for microtensile test. The fracture surface was observed using SEM. The data were analyzed by ANOVA and Tukey's post-Hoc test.
The results indicated that the incorporation of the nanofiller, improved the bond strength to dentin with the highest values obtained at 1 w% sepiolite nanoparticle content.
Sepiolite nanoparticles can be considered as novel fillers to improve the mechanical properties of dentin bonding agents. Dentin bonding agent, nanoparticles, bond strength, sepiolite, microtensile test.
本研究旨在探讨海泡石纳米颗粒的加入对一种实验性牙本质粘结剂与人类牙本质微拉伸粘结强度的影响。
将海泡石纳米颗粒以0.0、0.2、1.0、2.0和5.0重量百分比的浓度加入到一种实验性甲基丙烯酸酯基牙本质粘结系统中。然后对标本进行超声处理，以使纳米颗粒在粘合剂基质中精细分散。将30颗完整人类前磨牙的冠部釉质切开以暴露牙本质。在酸蚀、冲洗并吸干后，将实验性粘结剂应用于牙本质表面。根据制造商的说明，Adper Single Bond用作对照组。然后用复合材料对所有牙齿进行堆塑，并切成棒状进行微拉伸试验。使用扫描电子显微镜观察断裂表面。数据通过方差分析和Tukey事后检验进行分析。
结果表明，纳米填料的加入提高了与牙本质的粘结强度，在海泡石纳米颗粒含量为1重量%时获得了最高值。
海泡石纳米颗粒可被视为新型填料，以改善牙本质粘结剂的机械性能。牙本质粘结剂、纳米颗粒、粘结强度、海泡石、微拉伸试验。
