碱性环境下放置的磷酸酯单体对氧化锆陶瓷粘接的作用

Abstract

Abstract: Objective To explore the influence of the primer containing two different phosphate monomers, MDP and PENTA, on the adhesion between zirconia ceramics and resin in alkaline environment for different times. Methods Two primers were prepared, containing two phosphate monomers, MDP and PENTA, adding a certain amount of sodium hydroxide to adjust the pH value of 9, and the group without alkaline solution was taken as a positive control. The above primers were placed for 2 h, 1 week and 4 weeks, then they were used to treat zirconia ceramics to measure its shear bond strength (SBS) with resin. The zirconia ceramics powder was treated with different primers placed for different times, and then tested by FTIR (Fourier Transform Infrared Spectroscopy) to analyze the surface chemical bond changes. Results Any phosphate ester monomer combined with alkaline solution can lead to the decrease of the value of SBS between zirconia and resin. There was no significant difference in shear bonding strength between zirconia and resin treated by primers containing two phosphate monomers (P＞0.05). The longer the storage time was, the lower the bonding strength was (P＜0.05). Conclusion Application of phosphate monomers mixed with alkaline solution negatively affects the bonding strength between zirconia and resin.

Key words: zirconia, bonding strength, phosphate ester monomers, surface treatments

CLC Number:

R783.1

References

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Effects of phosphate ester monomers in alkaline environment on bond strength of zirconia ceramics

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