Does acid etching morphologically and chemically affect lithium disilicate glass ceramic surfaces?
Does acid etching morphologically and chemically affect lithium disilicate glass ceramic surfaces?
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DOI：
10.5301/jabfm.5000303
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发表时间：
2017-01-01
影响因子：
2.5
通讯作者：
Minagi, Shogo
中科院分区：
文献类型：
--
作者：
Maruo, Yukinori;Nishigawa, Goro;Minagi, Shogo
工作背景：本研究评估了二硅酸锂玻璃陶瓷的表面形态，化学成分和酸蚀后的氢氟酸或磷酸。方法：二硅酸锂玻璃陶瓷试样抛光600粒度碳化硅纸进行一个或这些表面处理的组合：用50 μ m氧化铝（AA）进行空气中的颗粒磨损，用5%氢氟酸（HF）或36%磷酸（Phos）进行蚀刻，并使用硅烷偶联剂（Si）。使用自粘性树脂骨水泥（Clearfil SA骨水泥）将直径为3.6 mm、高度为2.0 mm的不锈钢棒骨水泥固定在经处理的陶瓷表面上。陶瓷和水泥之间的剪切粘结强度进行了测量后，24小时的存储在37摄氏度的蒸馏水。结果：AA的SEM图像显示形成的常规microretentive凹槽，但酸蚀刻与HF或Phos产生的多孔表面。AA+HF+Si（28.1 +/- 6.0 MPa）、AA+Phos+Si（17.5 +/- 4.1 MPa）和HF+Si（21.0 +/- 3.0 MPa）的粘结强度显著大于未预处理的含Si对照组（9.7 +/- 3.7 MPa）和不含Si对照组（4.1 +/- 2.4 MPa）（p
Background: This study evaluated the surface morphology, chemical composition and adhesiveness of lithium disilicate glass ceramic after acid etching with hydrofluoric acid or phosphoric acid.Methods: Lithium disilicate glass ceramic specimens polished by 600-grit silicon carbide paper were subjected to one or a combination of these surface treatments: airborne particle abrasion with 50-mu m alumina (AA), etching with 5% hydrofluoric acid (HF) or 36% phosphoric acid (Phos), and application of silane coupling agent (Si). Stainless steel rods of 3.6-mm diameter and 2.0-mm height were cemented onto treated ceramic surfaces with a self-adhesive resin cement (Clearfil SA Cement). Shear bond strengths between ceramic and cement were measured after 24-hour storage in 37 degrees C distilled water.Results: SEM images of AA revealed the formation of conventional microretentive grooves, but acid etching with HF or Phos produced a porous surface. Bond strengths of AA+HF+Si (28.1 +/- 6.0 MPa), AA+Phos+Si (17.5 +/- 4.1 MPa) and HF+Si (21.0 +/- 3.0 MPa) were significantly greater than those of non-pretreated controls with Si (9.7 +/- 3.7 MPa) and without Si (4.1 +/- 2.4 MPa) (p