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首页> 外文期刊>Lasers in Medical Science >An analysis of the shear strength of the bond between enamel and porcelain laminate veneers with different etching systems: acid and Er,Cr:YSGG laser separately and combined
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An analysis of the shear strength of the bond between enamel and porcelain laminate veneers with different etching systems: acid and Er,Cr:YSGG laser separately and combined

机译：分别使用酸和Er，Cr：YSGG激光和不同蚀刻系统分析搪瓷和瓷层压板饰面之间的粘结剪切强度

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摘要

Conditioning of the enamel surface is now an accepted and widely applied technique used to improve retention in porcelain laminate veneer restorations. The aim of this study was to evaluate strength of the bond between porcelain laminate veneers and tooth surfaces etched with acid and laser, separately and together. The teeth studied comprised 60 incisors extracted for periodontal reasons. These were divided into four groups according to etching method: group 1, acid etching alone; group 2, acid etching followed by laser etching; group 3, laser etching followed by acid etching; group 4, laser etching alone. The teeth were etched with 37% phosphoric acid and a Er,Cr:YSGG laser system. In addition, 60 IPS Empress II cylindrical blocks 2 mm in height and 5 mm in diameter were also prepared for the etched tooth surface. These blocks were bonded to the teeth with dual cured resin cement and shear tests were then performed. After the shear tests, Scanning electron microscopy images of the tooth surfaces were obtained at a magnification of ×3,800. Etching with acid alone yielded the highest mean value of bond shear strength (15.4±3.8 MPa), while laser etching followed by acid etching gave the lowest mean value (11.5±4.6 MPa). The mean values of the bond shear strength for acid etching followed by laser etching and laser etching alone were 13.8±3.9 MPa and 12.8±4.6 MPa, respectively. Statistical analysis revealed no significant differences between the groups. The results suggest that laser etching is easy to apply and less time-consuming. They further suggest that the order in which the acid and laser are applied in combined treatments is important.
机译：如今，搪瓷表面的修整已成为一种公认的且广泛应用的技术，用于改善瓷层压板单板修复体的固位力。这项研究的目的是分别评估和评估酸蚀和激光蚀刻的瓷层压板贴面与牙齿表面之间的粘结强度。研究的牙齿包括出于牙周原因拔除的60颗切牙。根据蚀刻方法将它们分为四组：第一组，单独进行酸蚀刻；第二组，单独进行酸蚀刻。第2组，酸蚀刻，然后激光蚀刻；第3组，激光蚀刻，然后酸蚀刻；第4组，仅激光蚀刻。用37％的磷酸和Er，Cr：YSGG激光系统蚀刻牙齿。此外，还为蚀刻后的牙齿表面准备了60个高2mm，直径5mm的IPS Empress II圆柱块。这些块用双固化树脂胶粘剂粘结到牙齿上，然后进行剪切测试。经过剪切测试，以×3,800的放大倍数获得了牙齿表面的扫描电子显微镜图像。仅用酸蚀刻产生最高的结合剪切强度平均值（15.4±3.8 MPa），而先进行激光蚀刻然后进行酸蚀刻得到的平均值最低（11.5±4.6 MPa）。酸蚀刻然后进行激光蚀刻和仅激光蚀刻的结合剪切强度的平均值分别为13.8±3.9 MPa和12.8±4.6 MPa。统计分析显示两组之间无显着差异。结果表明，激光蚀刻易于实施且耗时较少。他们进一步表明，酸和激光联合处理的顺序很重要。

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