Effect of metal primer and thermocycling on shear bonding strength between the orthodontic bracket and gold alloy.
10.4041/kjod.2009.39.5.320
- Author:
Young Kee LEE
1
;
Jung Yul CHA
;
Hyung Seog YU
;
Chung Ju HWANG
Author Information
1. Graduate Student, Department of Orthodontics, College of Dentistry, Yonsei University, Korea.
- Publication Type:Original Article
- Keywords:
Bond strength;
Bracket;
Gold alloy;
Metal primer
- MeSH:
Alloys;
Collodion;
Methacrylates;
Orthodontic Brackets;
Thiones;
Thiouracil
- From:Korean Journal of Orthodontics
2009;39(5):320-329
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: The aim of this study was to evaluate the effect of metal primers and thermocycling on shear bond strength between the orthodontic bracket and gold alloy. METHODS: For this study, 80 specimens made of dental gold alloy were divided into 8 groups based on the combination of metal primers (none, Alloy primer, Metaltite, V-primer) and thermocycling (with and without thermocycling). Shear bond strength testing was performed with a universal testing machine. Bond failure sites were classified by a modified ARI (Adhesive Remnant Index) score. RESULTS: All metal primer treated groups showed a significantly higher shear bond strength than the only sandblasting treated group without thermocycling (p<0.05). There were no significant differences on shear bond strength in the groups with thermocycling (p>0.05). Bond failure sites of the metal primer treated group without thermocycling occurred at gold alloy/adhesive interface, whereas there were no differences on bonding failure sites in the groups with thermocycling. CONCLUSIONS: These findings suggest that using metal primer on gold alloy enhances the initial bracket bond strength. But, this effect was not shown with thermocycling.
