Two modes of nanoleakage expression in single-step adhesives
Two modes of nanoleakage expression in single-step adhesives
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DOI：
10.1177/154405910208100708
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发表时间：
2002-07-01
影响因子：
7.6
通讯作者：
Yoshiyama, M
中科院分区：
文献类型：
--
作者：
Tay, FR;Pashley, DH;Yoshiyama, M
同时蚀刻、涂底漆和粘结的自蚀刻粘合剂不应在混合层内表现出不完全的树脂渗透。我们假设这些系统中的纳米泄漏模式是由弱酸性硝酸银中的矿物质溶解引起的伪影。树脂-牙本质界面采用四步法粘接。通过常规（pH4.2）和碱性氨性（pH9.5）硝酸银检查自蚀刻粘合剂的纳米渗漏，并制备用于透射电子显微镜。当使用常规的银时，所有粘合剂在混合层内表现出纳米泄漏的网状模式。使用氨性银，在粘合剂和混合层内观察到纳米泄漏的额外斑点图案。自蚀刻粘合剂中的纳米泄漏的网状模式可能代表导致区域次优聚合的不完全水去除的位点。使用硝酸氨银鉴定的斑点图案可能代表粘合剂和混合层中的潜在可渗透区域，其由碱性二胺银离子与酸性/亲水性树脂组分的相互作用产生。
Self-etch adhesives that etch, prime, and bond simultaneously should not exhibit incomplete resin infiltration within hybrid layers. We hypothesized that nanoleakage patterns in these systems are artifacts caused by mineral dissolution in mildly acidic silver nitrate. Resin-dentin interfaces bonded with four single-step. self-etch adhesives were examined for nanoleakage by conventional (pH 4.2) and basic ammoniacal (pH 9.5) silver nitrate and prepared for transmission electron microscopy. All adhesives exhibited a reticular mode of nanoleakage within hybrid layers when conventional silver nitrate was used, With ammoniacal silver nitrate, an additional spotted pattern of nanoleakage was observed within adhesive and hybrid layers. The reticular mode of nanoleakage in self-etch adhesives probably represents sites of incomplete water removal that leads to regional suboptimal polymerization. The spotted pattern identified with the use of ammoniacal silver nitrate probably represents potentially permeable regions in the adhesive and hybrid layers that result from the interaction of the basic diamine silver ions with acidic/hydrophilic resin components.