Effect of various surface conditionings on the shear bond strength of orthodontic brackets to porcelain
- VernacularTitle:瓷表面处理对正畸托槽与瓷黏结抗剪强度的影响
- Author:
Cong WANG
;
Shaoan WANG
;
Zheng YANG
- Publication Type:Journal Article
- Keywords:
Porcelain;
Orthodontic bracket;
Bonding;
Shear bond strength
- From:
Journal of Practical Stomatology
2001;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effect of various surface treatments with different water bath time and thermocycling on the shear bond strength of orthodontic brackets to the feldspathic porcelain surfaces.Methods:Four surface conditioned methods were applied on 128 disc-shaped porcelain specimens.Metal or ceramic brackets were bonded onto each treated porcelain disc with light-cured resin.The samples were randomly assigned and bathed in 37 ℃ water 1 day or 7 days respectively,and thermocycled 500 times from 5 ℃ to 55 ℃.The shearing strengths were measured and bond failure sites were classified according to the adhesive remnant index system.The treated porcelain surfaces were examined with scanning electronic microscopy.Results:Almost the same effects of the four conditionings on the two types of brackets were obtained.All groups achieved adequate bond strengths to withstand the application of orthodontic forces.Conclusion:The optimal method for orthodontic brackets bonding to feldspathic porcelain is to apply orthophosphoric acid combined with silane.
