EFFECT OF SURFACE TREATMENT ON FLEXURAL STRENGTH OF ZIRCONIA BARS
EFFECT OF SURFACE TREATMENT ON FLEXURAL STRENGTH OF ZIRCONIA BARS
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DOI：
10.1016/s0022-3913(10)60100-x
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发表时间：
2010-08-01
影响因子：
4.6
通讯作者：
Wang, Hang
中科院分区：
文献类型：
--
作者：
Aboushelib, Moustafa N.;Wang, Hang
问题陈述。临床和实验室加工技术会对氧化锆框架的表面造成损害，从而显着降低其强度。目的。本研究的目的是探讨3种表面修复方法对氧化锆棒抗弯强度的影响材料和方法。条形样品经过抛光并接受 2 种表面处理中的 1 种（n=20）：在 2 MPa 压力下用 110 μm 氧化铝颗粒进行气载颗粒磨削，或使用空气涡轮在水冷和 2 N 负载下用金刚石刀头磨削。抛光样本作为对照 (n=20) 使用以下修复方法之一修复引起的表面损伤：使用涂有 0.5 μm 金刚石抛光膏的氧化铝抛光点（2-μm 砂砾）对样本进行抛光，根据制造商的说明涂上一层薄薄的釉瓷，或使用含有粘合剂的磷酸酯单体 (MDP) 树脂。对样品进行 4 点弯曲强度测试，然后使用扫描电子显微镜 (SEM) 进行检查。使用双向方差分析和 Bonferroni 事后检验来分析数据 (alpha=05) 结果。表面损伤类型和修复方法之间存在显着的交互作用（P
Statement of problem. Clinical and laboratory processing techniques induce damage to the surface of zirconia frameworks, which significantly lessens their strength.Purpose. The purpose of this study was to investigate the influence of 3 surface restoration methods on the flexural strength of zirconia barsMaterial and methods. Bar-shaped specimens were polished and received 1 of 2 surface treatments (n=20): airborne-particle abrasion with 110-mu m aluminum oxide particles at a pressure of 2 MPa, or grinding with a diamond point under water cooling and a load of 2 N using an air turbine. Polished specimens served as the control (n=20) The induced surface damage was restored using one of the following restoration methods: polishing of the specimens using an aluminum oxide polishing point (2-mu m grit) coated with 0.5-mu m diamond polishing paste, application of a thin coat of glazing porcelain according to the manufacturer's instructions, or application of a phosphate ester monomer (MDP) containing an adhesive resin. The specimens were subjected to a 4-point flexural strength test and then examined using a scanning electron microscope (SEM). Two-way ANOVA and the Bonferroni post hoc test were used to analyze the data (alpha=05)Results. There was a significant interaction between the type of surface damage and the restoration method (P