Department of Restorative Dentistry, School of Dentistry, Ceuma University, R. Josué Montello, 1, Renascença II, 65075-120 São Luis, Maranhão, Brazil.
Department of Chemistry, CCET, Federal University of Maranhão (UFMA), Av. dos Portugueses, 1966, 65085-580 São Luís, Brazil.
J Mech Behav Biomed Mater. 2018 Feb;78:188-195. doi: 10.1016/j.jmbbm.2017.11.016. Epub 2017 Nov 10.
This study evaluated the incorporation of niobophosphate bioactive glass (NbG) fillers into a commercial adhesive resin.
The silanized (NbGs) or non-silanized (NbG) NbG was added to the commercial adhesive system One Step (OS) at 30% by weight; unfilled adhesive served as control. The bioactivity of adhesives was analyzed by SEM and FTIR/ATR after 28 days in PBS. The adhesives were evaluated as regards microtensile bond strength immediately and after six months (n = 6); degree of conversion (n = 3), microhardness (n = 5); and radiopacity (n = 3). Data from each test were submitted to ANOVA and Tukey tests (P <0.05).
FTIR/ATR analysis showed phosphate and carbonate precipitates on the NbG adhesive specimen surface. Statistical analysis of microtensile bond strength values showed that material x time interaction was not significant, but NbG group values were similar to those of unfilled adhesive (p <0.05). Addition of NbG did not alter the degree of conversion, but did increase microhardness and radiopacity values of the adhesive systems compared with those of the control group (OS). Incorporation of NbG into the adhesive system did not compromise the properties of the adhesive.
A smart adhesive system with bioactive properties, high radiopacity, microhardness, and similar bond strength and degree of conversion was obtained by incorporating 30% by weight of NbG.
本研究评估了将磷铌酸盐生物活性玻璃（NbG）填料加入商业胶粘剂中的情况。
将硅烷化（NbGs）或未硅烷化（NbG）的 NbG 以 30wt%的比例添加到商用 One Step（OS）胶粘剂系统中；未填充的胶粘剂作为对照。在 PBS 中放置 28 天后，通过 SEM 和 FTIR/ATR 分析胶粘剂的生物活性。立即和 6 个月后（n=6）评估胶粘剂的微拉伸粘结强度；转化率（n=3）、显微硬度（n=5）和射线不透性（n=3）。每个测试的数据都提交进行方差分析和 Tukey 检验（P<0.05）。
FTIR/ATR 分析表明 NbG 胶粘剂试件表面有磷酸盐和碳酸盐沉淀。微拉伸粘结强度值的统计分析表明，材料 x 时间的相互作用不显著，但 NbG 组的值与未填充的胶粘剂相似（p<0.05）。添加 NbG 不会改变转化程度，但与对照组（OS）相比，会增加胶粘剂系统的显微硬度和射线不透性值。将 NbG 掺入胶粘剂系统不会影响胶粘剂的性能。
通过掺入 30wt%的 NbG，获得了一种具有生物活性、高射线不透性、显微硬度以及相似粘结强度和转化率的智能胶粘剂系统。
