Effects of nano-zirconium hydroxide coating on resin bonding of 10-methacryloxy decyldihydrogen phosphate-conditioned zirconia

doi:10.7518/hxkq.2018.03.004

Abstract

Abstract:

Objective This study evaluated the influence of alkaline coating of nano-zirconium hydroxide on resin bonding of 10-methacryloxy decyldihydrogen phosphate (MDP)-conditioned zirconia. Methods A total of 140 yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) plates were prepared and sandblasted with alumina particles, and then subjected to different surface treatment. Resin bonding specimens were prepared with a MDP-free resin cement and tested for shear bond strength (SBS). X-ray photoelectron spectroscopy (XPS) was used to investigate the formation of chemical bond on the surface of Y-TZP treated successively with nano-zirconium hydroxide coating and MDP containing primer. Results The two alkaline coatings increased the 24 h SBS compared to control groups, and groups using nano-zirconium hydroxide coating yielded higher SBS. After thermocycling, no statistical difference was observed between groups, but SBS decreased significantly compared to the 24 h SBS (P<0.05). XPS analysis detected -OH bond on the surface of Y-TZP treated with nano-zirconium hydro-xide coating, and -P-O-Zr bond was detected on the surface of Y-TZP treated with nano-zirconium hydroxide coating and MDP-containing primer. Conclusion Alkaline coatings improved the bonding of resin to zirconia conditioned with MDP-containing primers.

Key words: zirconia, bond, 10-methacryloxy decyldihydrogen phosphate, nano zirconium hydroxide, pH value, coating

CLC Number:

R783.2

Bingzhuo Chen, Lu Yang, Ying Chen, Huaiqin Zhang, Haifeng Xie, Feng He. Effects of nano-zirconium hydroxide coating on resin bonding of 10-methacryloxy decyldihydrogen phosphate-conditioned zirconia[J]. West China Journal of Stomatology, 2018, 36(3): 252-256.

Figures/Tables 5

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组别	37 ℃水储24 h	冷热循环20 000次
Ctr	5.95±2.00	2.48±1.72
Zp	9.54±1.74	6.96±1.96
Cp	8.73±2.01	6.15±1.73
ZpZr	12.23±1.91	7.03±1.89
CpZr	13.40±1.89	7.24±1.90
ZpNa	10.95±1.89	7.66±2.02
CpNa	10.29±1.93	7.65±1.96