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首页> 外文期刊>Journal of Lasers in Medical Sciences >The Effect of Fractional CO2 Laser Irradiation on Shear Bond Strength of Resin Cement to Feldspathic Porcelain
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The Effect of Fractional CO2 Laser Irradiation on Shear Bond Strength of Resin Cement to Feldspathic Porcelain

机译：分次CO2激光辐照对树脂水泥对长石瓷的剪切粘结强度的影响

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Introduction : This study investigated the effect of fractional CO2 laser on shear bond strength (SBS) of resin cement to feldspathic porcelain. Methods : Sixty blocks of unglazed feldspathic porcelain were randomly divided into 5 groups of 12 by treatment. Group 1 and 2 underwent etching with 9.6% hydrofluoric acid (HF) and air abrasion with alumina particles, respectively. In groups 3 and 4, a fractional CO2 laser was applied for 10 seconds using 20 W/10 mJ (group 3) or 15 W/20 mJ (group 4). The specimens in group 5 were first treated by fractional CO2 laser (15 W/20 mJ) and then etched by HF acid. After silane application, a resin cement (Clearfil SA) was poured into plastic molds over the porcelain surface and light cured. SBS was assessed by a universal testing machine and the type of bond failure was determined. Results : Analysis of variance (ANOVA) indicated a significant difference in SBS among the study groups (P 0.001). Pairwise comparison demonstrated that the application of fractional CO2 laser followed by HF acid yielded SBS that was significantly greater than that of the other groups (P 0.05). The SBS of both laser groups (groups 3 and 4) were comparable to each other and significantly lower than the other groups (P 0.05). No significant difference was found in the distribution of failure modes among the groups (P = 0.522) Conclusion : The application of fractional CO2 laser followed by HF acid treatment can improve SBS of resin cement to feldspathic porcelain and could be recommended when demanding extra retention.
机译：简介：这项研究研究了分数CO2激光对树脂水泥与长石瓷的剪切粘结强度（SBS）的影响。方法：将六十块无釉长石瓷按治疗方法随机分为5组，共12组。第1组和第2组分别用9.6％的氢氟酸（HF）进行蚀刻，并用氧化铝颗粒进行空气磨蚀。在第3组和第4组中，使用20 W / 10 mJ（第3组）或15 W / 20 mJ（第4组）施加分数CO2激光10秒钟。第5组的样品首先用分数CO2激光（15 W / 20 mJ）处理，然后用HF酸蚀刻。涂覆硅烷后，将树脂胶泥（Clearfil SA）倒入瓷器表面的塑料模具中并进行光固化。通过通用测试机评估SBS，并确定粘结失效的类型。结果：方差分析（ANOVA）表明研究组之间的SBS有显着差异（P <0.001）。配对比较表明，使用分数CO2激光和HF酸产生的SBS显着高于其他组（P <0.05）。两个激光组（第3组和第4组）的SBS彼此相当，并且显着低于其他组（P <0.05）。各组之间的破坏模式分布没有显着差异（P = 0.522）结论：应用分数CO2激光再进行HF酸处理可以改善树脂水泥对长石瓷的SBS，建议在需要额外保留时建议使用。

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