Effect of Zirconia Surface Roughness on Shear Bond Strength to Resin Cements
Despite the expanded application for zirconia in restoration dentistry,there is less clear recommendation in the literature regarding the relation between zirconia surface roughness and its shear bond strength to resin cements.The aim of this study was to assess the effect of surface roughness of Cercon zirconia on its shear bond strength to resin cements.66 Zirconia rectangular specimens (10 × 10 × 3 mm) were prepared from Cercon zirconia blocks,finished using a diamond rotary cutting instrument,sintered,and then assigned into 6 groups.The specimens in the first group without polishing were used as control.Other groups were polished against 120#,240#,360#,500# and 600# sand paper after sintered,respectively.Ceramic surface were analyzed by scanning electron microscopy and Surface profilometer.10 samples of each group were bonded with Variolink N resin cements respectively and submitted to shear bond strength test.Shear bond strength was measured and analyzed.The results showed that the population means of 6 groups of samples were not equal.There was no significant difference between control group and 600# sand paper treated group,500#,360# and 240# sand paper treated groups (P>0.05),but a significant difference among the other groups (P < 0.05).Findings of this study revealed that the shear bond strength might be raised by increasing the surface roughness of Cercon zirconia.Therefore,the surface roughness of Cercon zirconia has an effect on the shear bond strength,but is not the determining factor in clinical use.
Resin cement Zirconia Surface roughness Shear bond strength
Chen Hu Longquan Shao Yuanfu Yi Qi Liu Bin Deng Ning Wen
Department of Stomatology,Nanfang Hospital,Southern Medical University,Guangzhou 510515,China Department of Stomatology,the General Hospital of Chinese Peoples Armed Police Forces,Beijing 10003 Department of Stomatology,the General Hospital of Chinese PLA,Beijing 100853,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1765-1769
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）