Chinese Journal of Tissue Engineering Research ›› 2012, Vol. 16 ›› Issue (8): 1435-1438.doi: 10.3969/j.issn.1673-8225.2012.08.023

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Effects of surface treatments and cement types on the shear strength of zirconia 

Shao Long-quan1, Hu Chen1, Sun Ting1, Liu Xiao-fang2, Wen Ning3, Deng Bin3   

  1. 1Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou  510515, Guangdong Province, China; 2Guangdong Provincial Stomatological Hospital, Guangzhou  510280, Guangdong Province, China; 3Department of Stomatology, General Hospital of Chinese PLA, Beijing  100853, China
  • Received:2011-09-17 Revised:2011-11-03 Online:2012-02-19 Published:2012-02-19
  • About author:Shao Long-quan☆, Doctor, Professor, Chief physician, Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China shaolongquan@ yahoo.com.cn
  • Supported by:

    National Natural Science Foundation of China, No. 50872152*; Natural Science Foundation of Guangdong Province, No. 9151051501000072*; Science and Technology Project of Baiyun District of Guangzhou City, No. 2010-KZ-20*; Presidential Foundation of Nanfang Hospital, Southern Medical University, No. 2009B016*

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Abstract:

BACKGROUND: Reasonable choice of surface treating method and cement can improve the bond performance effectively when using zirconia restorations in clinic.
OBJECTIVE: To evaluate the effects of different surface treatments and types of cements on the shear strength of Upcera zirconia.
METHODS: Seventy-two zirconia ceramic samples after sanding with 600# water sandpaper were divided into six groups. Three different surface treating methods were used respectively as follows: hand-polishing with 240# water sandpaper, sand blasting and silanization. Before and after the surface treatment, the samples were observed by scanning electron microscope. Two different luting cements (Panavia F and Fuji CEM) were selected. After 24 hours of pressurized bonded fixation, the shear strengths were measured by universal testing machine and analyzed with factorial variance analysis.
RESULTS AND CONCLUSION: The shear strength in the sand blasting group was significantly higher than other groups (P < 0.05). The shear strength of the Panavia F group was higher than that of the Fuji CEM group (P < 0.05).The surface morphology of samples treated with sand blasting was rougher compared with the other two. Findings of this study revealed that sand blasting can effectively enhance the shear strength of zirconia ceramic to both resin cement and glass ionomer cement; on the contrary, sand paper polishing and silanization cannot affect the shear strength. What is more, resin cement performs better in improving the bond performance of zirconia ceramic restorations.

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