中国实用口腔科杂志

中国实用口腔科杂志 ›› 2011, Vol. 4 ›› Issue (01): 33-38.

• 论著 • 上一篇    下一篇

不同基底材料与饰面瓷结合力实验研究

  

  1. 大连市口腔医院修复科，辽宁  大连  116021
  • 收稿日期:2010-11-20 修回日期:2010-12-30 出版日期:2011-01-15 发布日期:2011-02-22

  • Received:2010-11-20 Revised:2010-12-30 Online:2011-01-15 Published:2011-02-22

摘要：

目的    比较不同基底材料与饰面瓷的结合力，为修复临床选择不同的瓷修复体提出依据。方法    2009年11月至2010年5月在大连市口腔医院应用特制模具制作基底材料标本蜡型（直径6 mm，高8 mm）共60个。根据各基底材料制作要求分别制作镍铬（Ni-Cr）合金、钴铬（Co-Cr）合金、金钯（Au-Pd）合金、混合Au-Pd合金、压铸瓷及氧化锆基底材料标本（每组10个）。在实验标本的一端堆瓷，瓷层总厚度控制在（2.0±0.01）mm。在万能试验机上以0.5 mm／min的加载速度进行加载至剪切断裂。对实验标本的剪切强度进行单因素方差分析。结果    6种瓷修复体的的剪切强度为：Au-Pd合金组（51.56±8.93）MPa，Ni-Cr合金组（45.61±3.11）MPa，Co-Cr合金组（37.12±4.08）MPa，混合金钯合金组（36.07±5.42）MPa，氧化锆组（31.52±7.45）MPa，压铸瓷组（29.62±9.97）MPa。单因素方差分析表明不同金属合金基底材料与饰面瓷间的剪切强度差异有统计学意义（P < 0.01）。结论      不同基底材料与饰面瓷的剪切强度存在差异。Au-Pd合金和Ni-Cr合金与饰面瓷结合力强。

关键词: 陶瓷, 基底合金, 剪切强度, 金瓷界面

Abstract:

Objective    To compare the shear bond strength of different base materials and veneering porcelain，and to propose basis for clinical rehabilitation choices of different ceramic restoration. Methods    A special mold was used for preparation of the wax pattern of base specimens， 60 in total. Cylindrical base specimens， 8 mm high and 6mm in diameter， were fabricated according to the manufacturer’s instructions， including Ni-Cr alloy， Co-Cr alloy， Au-Pd alloy， mixed Au-Pd alloy， casting ceramic and zirconia （n=10）. The thickness of veneer ceramics was （2.0±0.01）mm over the transverse section of base specimens， and sintering strictly according to the manufacturer’s recommended procedures. The shear tests were performed in a universal testing machine at a cross-head speed of 0.5 mm／min， and the shear bond strength was recorded. The experimental data of shear bond strength were analyzed by One-way ANOVA. Results    The mean shear bond strength was：（51.56±8.93）MPa （Au-Pd alloy）， （45.61±3.11）MPa （Ni-Cr alloy）， （37.12±4.08）MPa （Co-Cr alloy）， （36.07± 5.42）MPa （mixed precious group）， （31.52±7.45）MPa （zirconia）， and （29.62±9.97）MPa （casting ceramic）. Results of One-way ANOVA showed that there were significant differences between ceramic／alloy combination tested （P < 0.001）. Conclusion    The results of this study indicate that the shear bond strength of different base materials and veneering porcelain are different. Porcelain fused to Au-Pd alloy and Ni-Cr alloy show maximum bonding strength.

Key words: ceramic；base alloy；shear bond strength；metal-ceramic interface