Effects on the shear bond strength of orthodontic brackets with different concentration of fluorided etching fluid.
- Author:
Jia MA
1
;
Yang ZHANG
;
Yu-hua HONG
Author Information
- Publication Type:Journal Article
- MeSH: Acid Etching, Dental; Dental Bonding; Humans; Orthodontic Brackets; Phosphoric Acids; Resin Cements; Shear Strength; Surface Properties
- From: West China Journal of Stomatology 2005;23(5):397-399
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVEThis study was to find out the most suitable concentration of added NaF to enough bonding strength of brackets.
METHODSSixty-four teeth were randomly divided into A, B, C and the control group. NaF of four different concentrations (1.23%, 2%, 3% and 0%) was added into 35% phosphoric acid. The four group teeth were etched with four kinds of fluoride etching fluid respectively and were bonded with brackets. Four specimens in each group were selected by turns after 1, 4, 12 and 24 weeks of bonding. The shear bond strength of the teeth were tested, and the adhesive residual index (ARI) of bonding interface were recorded.
RESULTSThe shear bond strength at four test time in each group was no significant (P > 0.05). There was statistical difference of the shear bond strength between four groups (P < 0.05), and group C was lower than the other groups. The ARI was no statistical difference between four groups.
CONCLUSIONThe effects of etching and bonding had no significant changes when the concentration of added NaF was no more than 2%. The shear bond strength decreased while the concentration of NaF was higher than 3%.
