• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Prosthetic Dentistry >The effect of zirconia surface treatment on flexural strength and shear bond strength to a resin cement.
【24h】

The effect of zirconia surface treatment on flexural strength and shear bond strength to a resin cement.

机译：氧化锆表面处理对树脂水泥的弯曲强度和剪切粘结强度的影响。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

STATEMENT OF PROBLEM: Despite the expanded applications for zirconia in restorative dentistry, there is no clear recommendation in the literature regarding surface treatment before bonding. PURPOSE: The purpose of this study was to evaluate the effect of mechanical surface treatment of yttria-partially stabilized zirconia on its flexural strength and the effect of mechanical and chemical surface treatments on its bond strength to a resin cement. MATERIAL AND METHODS: For flexural strength evaluation, zirconia bars (4 x 5 x 40 mm) were prepared from zirconia blocks, finished using a diamond rotary cutting instrument, sintered, then assigned into 4 groups: (1) control (no treatment), (2) airborne-particle abrasion, (3) silicoating, and (4) wet hand grinding. After storage for 24 hours at 37 degrees C, flexural strength was determined using a 3-point bending test, and the results were analyzed using 1-way ANOVA (alpha=.05). For shear bond strength evaluation, zirconia rods (2.5 x 3 mm) were prepared from zirconia blocks, sintered, and assigned into 16 groups. Each group underwent a combination of the following mechanical and chemical treatments. Mechanical treatment included: (1) control (no treatment), (2) airborne-particle abrasion, (3) silicoating, or (4) wet hand grinding. Chemical treatment included: (1) control (no treatment), (2) acid etching followed by silanation, (3) silanation only, or (4) application of zirconia primer. Dentin specimens were prepared from extracted molars stored in 0.5% chloramine-T. Zirconia rods were bonded to dentin using a resin cement (Multilink Automix), then light polymerized. After storage, the specimens were loaded to failure with the notched shear bond test method in a universal loading apparatus. For artificial aging analysis, the groups that achieved the highest bond strength values were duplicated, stored at 37 degrees C and 100% humidity for 90 days, and thermal cycled before being loaded to failure. Results were analyzed using 2-way ANOVA (alpha=.05). RESULTS: Airborne-particle abrasion and hand grinding significantly increased flexural strength. The highest shear bond strength values were achieved for the following groups: silicoated + silanated > hand ground + zirconia primer > airborne-particle abraded + silanated > zirconia primer > airborne-particle abraded + zirconia primer. Artificial aging resulted in significantly lower shear bond strength for the silicoated/silanated and the zirconia primer groups. CONCLUSIONS: Mechanical modification of the surface increased the flexural strength of Y-TZP. The resin bond to Y-TZP was improved by surface treatment. A combination of mechanical and chemical conditioning of the zirconia surface was essential to develop a durable resin bond to zirconia.
机译：问题陈述：尽管氧化锆在修复牙科领域得到了广泛的应用，但文献中没有关于粘结前表面处理的明确建议。目的：本研究的目的是评估氧化钇部分稳定的氧化锆的机械表面处理对其抗弯强度的影响，以及机械和化学表面处理对其与树脂水泥的粘结强度的影响。材料和方法：为了评估抗弯强度，用氧化锆块制备了氧化锆棒（4 x 5 x 40毫米），使用金刚石旋转切割仪精加工，烧结，然后分为4组：（1）对照（未处理）， （2）空气中的颗粒磨损，（3）硅化和（4）湿手磨。在37摄氏度下保存24小时后，使用三点弯曲测试确定弯曲强度，并使用1向ANOVA（alpha = .05）分析结果。为了评估剪切粘结强度，用氧化锆块制备了氧化锆棒（2.5 x 3 mm），进行了烧结，并分为16组。每组进行以下机械和化学处理的组合。机械处理包括：（1）对照（未处理），（2）气载颗粒磨损，（3）硅化处理，或（4）湿手磨。化学处理包括：（1）对照（不处理），（2）酸蚀后进行硅烷化，（3）仅硅烷化，或（4）氧化锆底漆的施加。从储存在0.5％氯胺-T中的提取磨牙制备牙本质标本。使用树脂粘固剂（Multilink Automix）将氧化锆棒粘结到牙本质上，然后进行轻聚合。储存后，将样品用缺口剪切粘合力测试方法在通用加载设备中加载至失败。对于人工老化分析，将达到最高粘结强度值的基团重复，在37摄氏度和100％湿度下存储90天，并热循环，然后加载至失效。使用2通ANOVA（alpha = .05）分析结果。结果：空气颗粒的磨损和手磨明显提高了抗弯强度。下列组达到了最高的剪切粘结强度值：硅化+硅烷化>手工研磨+氧化锆底漆>气固颗粒磨损+硅烷化>氧化锆底漆>气载颗粒研磨+氧化锆底漆。人工老化导致硅化/硅烷化和氧化锆底漆基团的剪切剪切强度明显降低。结论：表面机械改性提高了Y-TZP的抗弯强度。通过表面处理改善了与Y-TZP的树脂结合。氧化锆表面的机械和化学调节相结合对于形成与氧化锆的持久树脂键至关重要。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号