Effect of hydrofluoric acid etching time on the resin bond durability of glass ceramic
10.3760/cma.j.issn.1002-0098.2010.05.014
- VernacularTitle:氢氟酸处理时间对玻璃陶瓷与树脂粘接耐久性的影响
- Author:
Xiang-Feng MENG
1
;
Xiao-Lu ZHOU
;
Xiao-Ping LUO
Author Information
1. 南京大学口腔医学院·南京市口腔医院
- Keywords:
Hydrofluoric acid;
Resin cement;
Shear strength;
Ceramics;
Silane coupler
- From:
Chinese Journal of Stomatology
2010;45(5):307-312
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the effect of hydrofluoric acid(HFA) etching time on the resin bond durability of glass ceramic.Methods Three groups of samples of machinable glass ceramic (ProCAD) were etched by 4.8% HFA for 0, 30 and 60 s respectively.The roughness parameters (Ra, Sm, S) and surface area of the samples,were measured with a 3D-laser scanning microscope.Then the ceramic surfaces were bonded with four resin cements(silane coupler/resin cement) , which were Monobond S/Variolink Ⅱ, Clearfil Ceramic Primer/Clearfil Esthetic Cement, GC Ceramic Primer/Linkmax HV, and Porcelain Liner M/SuperBond.The micro-bond strengths between the ceramic and the resin were tested at baseline and after the samples had been treated in 30 000 thermal cycles.Results The Ra[(3.89±1.94) , (12.53±0.80) , (13.58±1.10) μm]and surface area[(7.81±2.96) , (30.18±2.05), (34.16±1.97) mm2]of ceramic increased with the increase of HFA etching time.The thermal cycling test reduced the bond strength of all test groups.The bond strength of Monobond S/Variolink II group[(3.59±3.51), (16.18±2.62), (20.33±2.45) MPa]and Clearfil Ceramic Primer/Clearfil Esthetic Cement group[(4.74±2.08) , (7.77±1.55), (13.45±3.75) MPa]increased with the increase of HFA etching time; 30 s HFA etching group of Porcelain Liner M/SuperBond had higher bond strength[(22.00±1.64) MPa]than its 0 s HFA etching group[(12.96±4.17) MPa], and no significant difference was found between the 30 s and 60 sHFA etching groups of Porcelain liner M/SuperBond[(20.42±3.01) MPa].HFA etching time had no effect on the bond strength of GC Ceramic Pritner/Linkmax HV.Conclusions HFA etching can improve the resin bond durability of glass ceramic, and the etching time is not only related to the change of ceramic surface roughness and area, but also to the characteristics of resins.
