Effect of removal of surface collagen fibrils on resin-dentin bonding.
Effect of removal of surface collagen fibrils on resin-dentin bonding.
复制标题
去除表面胶原原纤维对树脂-牙本质粘合的影响。
DOI：
10.1016/s0109-5641(99)00052-4
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
D. Pashley
中科院分区：
文献类型：
--
作者：
C. Prati;S. Chersoni;D. Pashley
方法牙本质盘经35%磷酸（PA）处理20 s，1.5%NaOCl处理2 min，1.5%PA处理2 min，1.5%NaOCl处理2 min。（3）PA处理后，再用10%NaOCl浸泡120 h。用扫描电镜观察牙本质及牙本质粘接剂界面的形态，用剪切强度试验检测粘接强度。然后将所有标本分成两半：一半在SEM下观察;另一半依次置于10%PA和12.5%NaOCl中70 h，以去除原始粘结界面树脂复制品中的所有牙本质。牙本质小管的直径、大小及侧支数目均增加。NaOCl施加在牙本质玷污层上没有显着改变其SEM形态。磷酸/NaOCl处理后的树脂标签直径比仅磷酸处理后的树脂标签直径更大。树脂渗透的牙本质层仅在单一磷酸（即常规蚀刻）程序后观察到，并且在磷酸/NaOCl组合处理后未观察到。与酸蚀刻对照组相比，使用Scotchbond MP和3 M Single Bond时，蚀刻/NaOCl样本的粘合强度较低，但Optibond FL和Prime & Bond 2.0组中未改性的粘合强度较高。用NaOCl处理蚀刻牙本质120小时产生了一种不寻常的矿化牙本质的树脂渗透类型，可以被称为“反向混合层”，这可以解释树脂粘结到NaOCl处理的牙本质的机制。SignificanceThe使用酸性调节剂暴露的胶原基质暴露了一个柔软的微妙的网格，可以崩溃，从而干扰树脂渗透。如果酸蚀后用NaOCl处理，则可以通过形成“反向混合层”来实现高粘结强度，这是一种提出的微机械树脂保持的新机制。这种机制尚未推荐用于临床，但证明了一种新型的树脂保留。
ObjectivesThe aim of this study was to evaluate the effects of NaOCl at removing the demineralized layer by examining the morphology of the hybrid layer and measuring shear bond strengths after different dentin treatments.MethodsDentin disks were treated with: (1) 35% phosphoric acid (PA) 20s; (2) PA treatment followed by 1.5% NaOCl, 2min; (3) PA treatment, followed by a 10% NaOCl immersion for 120h. SEM was used to analyze the morphology of dentin and its interface with dentin bonding agents (DBAs), while shear bond strength tests were used to measure adhesion. All specimens were then fractured into two halves: One half was inspected under SEM; the other half was sequentially placed in 10% PA followed by 12.5% NaOCl for 70h, to remove all dentin from the resin replica of the original bonded interface.ResultsSEM observations showed that collagen fibrils were completely removed from the acid-etched surface by NaOCl treatment. The diameter and the size of dentinal tubules and the number of lateral branches of the tubules were increased following NaOCl treatment. NaOCl applied on dentin smear layers did not significantly modify their SEM morphology. Resin tags were larger in diameter after phosphoric acid/NaOCl treatment than after only phosphoric acid treatment. Resin-infiltrated dentin-layers were only observed after the single phosphoric acid (i.e. conventional etching) procedure, and were not observed after combined phosphoric acid/NaOCl treatment. Etched/NaOCl samples showed a lower bond strength using Scotchbond MP and 3M Single Bond, but were higher in Optibond FL and unmodified in Prime & Bond 2.0 groups when compared with acid-etched controls. Treatment of etched dentin with NaOCl for 120h produced an unusual type of resin infiltration of mineralized dentin that could be called a “reverse hybrid layer” which may explain the mechanism of resin bonding to NaOCl treated dentin.SignificanceThe use of acidic conditioners for exposure of the collagen matrix exposes a soft delicate mesh that can collapse, thereby interfering with resin infiltration. If acid-etching is followed by NaOCl treatment, high bond strengths can be achieved via “reverse hybrid layer” formation, a proposed new mechanism of micromechanical resin retention. This mechanism is not yet recommended for clinical use but demonstrates a new type of resin retention.
影响因子：
2.2
作者：
H. Sano;T. Takatsu;B. Ciucchi;Horner Ja;W. G. Matthews;D. Pashley
通讯作者：
H. Sano;T. Takatsu;B. Ciucchi;Horner Ja;W. G. Matthews;D. Pashley