De Munck Jan, Van Meerbeek Bart, Yoshida Yasuhiro, Inoue Satoshi, Suzuki Kazuomi, Lambrechts Paul
Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-Facial Surgery, Leuven, Belgium.
Eur J Oral Sci. 2004 Feb;112(1):73-83. doi: 10.1111/j.0909-8836.2004.00089.x.
Glass-ionomers are auto-adhesive to tooth tissue through combined micro-mechanical and chemical bonding. How much each of the two bonding components contributes to the actual bonding effectiveness is, however, not known and there is not much information available on long-term stability. The objective of this study was to assess the bonding effectiveness of a resin-modified glass-ionomer adhesive to dentin after 4 yr of water storage. Fuji Bond LC (GC) was applied without (i) and with pretreatment using (ii) a polyalkenoic acid conditioner and (iii) a 37.5% phosphoric acid etchant. The etchant was used to exclude any chemical interaction with hydroxyapatite. The micro-tensile bond strength ( microTBS) to dentin decreased significantly over the 4 yr period in all three experimental groups. After 24 h and 4 yr, the lowest micro TBS was recorded when dentin was not pretreated. The highest micro TBS was obtained following polyalkenoic acid pretreatment, although this was not significantly different from specimens that were pretreated using phosphoric acid. Pretreating dentin with phosphoric acid intensified micromechanical interlocking at the expense of chemical bonding potential to hydroxyapatite. Nevertheless, correlating the micro TBS data with failure analysis through scanning electron microscopy and transmission electron microscopy indicated that combined micro-mechanical and chemical bonding involving pretreatment with the polyalkenoic acid conditioner yielded the most durable bond.
玻璃离子体通过微机械结合和化学结合的共同作用对牙齿组织具有自粘性。然而，这两种结合成分各自对实际粘结效果的贡献程度尚不清楚，并且关于长期稳定性的信息也不多。本研究的目的是评估一种树脂改性玻璃离子粘结剂在储存4年后对牙本质的粘结效果。应用富士粘结剂LC（GC）时，一组不进行预处理（i），另外两组分别使用（ii）聚羧酸调节剂和（iii）37.5%的磷酸蚀刻剂进行预处理。使用蚀刻剂以排除与羟基磷灰石的任何化学相互作用。在所有三个实验组中，4年期间牙本质的微拉伸粘结强度（microTBS）均显著下降。在24小时和4年后，未对牙本质进行预处理时记录到最低的微拉伸粘结强度。聚羧酸预处理后获得了最高的微拉伸粘结强度，尽管这与使用磷酸预处理的标本没有显著差异。用磷酸预处理牙本质增强了微机械互锁，但牺牲了与羟基磷灰石的化学键合潜力。然而，通过扫描电子显微镜和透射电子显微镜将微拉伸粘结强度数据与失效分析相关联表明，涉及聚羧酸调节剂预处理的微机械结合和化学结合共同作用产生了最持久的粘结。
