SEM evaluation of the interaction pattern between dentin and resin after cavity preparation using ER:YAG laser.
SEM evaluation of the interaction pattern between dentin and resin after cavity preparation using ER:YAG laser.
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DOI：
10.1016/s0300-5712(03)00003-4
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发表时间：
2003-02
影响因子：
4.4
通讯作者：
Marcelo Thomé Schein;J. Bocangel;G. Nogueira;Patrícia Alessandra Limas Schein
中科院分区：
文献类型：
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作者：
Marcelo Thomé Schein;J. Bocangel;G. Nogueira;Patrícia Alessandra Limas Schein
目的观察牙本质与树脂在Er：YAG激光空洞中形成的相互作用模式。方法从新鲜拔除的第三磨牙获取10个牙本质盘。每个盘接收两个腔，一个用传统的高速钻头制备，而另一个腔是通过使用Er：YAG激光器(KaVo key激光器，KaVo Co.)获得的。激光治疗采用250mJ/脉冲，4 Hz，非接触模式，聚焦光束，细水雾。制备了5个圆盘，对酸蚀处理后的牙本质进行了形态分析。其余5个椎体分别用Single Bond(3M)和Z100树脂(3M)修复。结果与结论酸蚀照射后牙本质的形态特征不利于单体通过胶原网络的扩散。辐照牙本质酸蚀后牙本质-树脂界面显示出较薄的标记和稀少的杂交区，这与所观察到的辐照和酸蚀处理牙本质基质的形态一致。
ObjectiveThe aim of this study was to describe the interaction pattern formed between dentin and resin on cavities prepared with an erbium laser (Er:YAG). The morphological aspect of the irradiated dentin after acid etching was also observed.MethodsTen dentin disks were obtained from fresh extracted third molars. Each disk received two cavities, one prepared with a conventional high-speed drill, while the other cavity was obtained by the use of an Er:YAG laser (KaVo KEY Laser, KaVo Co.). The laser treatment was performed with 250mJ/pulse, 4Hz, non contact mode, focused beam, and a fine water mist was used. Five disks were prepared for morphological analysis of the acid etched dentin. The other five disks had their cavities restored with Single Bond (3M) followed by Z100 resin (3M). The specimens were observed under scanning electron microscopy after dentin–resin interface demineralization and deproteinization.Results and conclusionsIt was observed that the morphological characteristics of the acid-etched irradiated dentin were not favorable to the diffussion of monomers through the collagen network. The dentin–resin interfacial aspect of irradiated dentin, after acid etching, showed thin tags and scarce hybridization zones, which agreed with the morphology of the irradiated and acid-etched dentin substrate observed.