Int J Stomatol

Inter J Stomatol ›› 2011, Vol. 38 ›› Issue (3): 257-260.doi: 10.3969/j.issn.1673-5749.2011.03.003

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Effects of nano-silica coating on fracture strength of glass infiltrated alumina ceramic

ZHU Ye1, XIE Hai-feng2, ZHANG Fei-min2.   

  1. 1. Dept. of Prosthodontics, Suzhou Health Professional Technology College, Suzhou 215002, China; 2. Research Institute of Stomatology, Nanjing Medical University, Nanjing 210029, China
  • Received:2010-07-12 Revised:2010-12-28 Online:2011-05-20 Published:2011-05-20

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Abstract:

Objective The aim of this study was to evaluate the effects of nano -silica coating prepared by different concentration silica sol on fracture strength of glass infiltrated alumina ceramic after bonding. Methods Five In-Ceram alumina ceramic groups were fabricated to receive different surface treatments as group A, B, C, D, E. Each ceramic disc was bonded to dentin with dual -cured resin cement, and then fracture strength of these samples was tested. After one sample of each group as before, scanning electron microscopy and energy dispersive spectrometer was used to analyze the interface. Results There existed differences among the five groups（P<0.05）, group C, D, E were higher than group A and B. There was not only no difference between group A and B, but also among group C, D, E. Small crack was detected in the interface of group A and B, but was not existed in group C, D, E. Conclusion A higher fracture strength could be acquired through preparing silica coating with sol-gol process on sandblasted In-Ceram ceramic surface followed by application of silane. But no difference is existed among the groups prepared by different concentration silica sol.

Key words: alumina ceramic, sol-gel method, nano-silica coating, anti-fracture strength


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