The Effect of Surface Treatment on Bond Strength of Polycarbonate Bracket.
- Author:
Seok Pil KIM
1
;
Nyeon Kyeong KIM
;
Hyun Jung LEE
;
Hyeon Shik HWANG
Author Information
1. Department of Orthodontics, School of Dentistry, Chonnam National University, Korea.
- Publication Type:Original Article
- Keywords:
Polycarbonate bracket;
Surface treatment;
Bond strength
- MeSH:
Adhesives;
Incisor;
Plastics
- From:Korean Journal of Orthodontics
2006;36(5):331-338
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: The purpose of this study was to evaluate whether the bond strength of polycarbonate brackets can be increased through surface treatment. METHODS: One hundred polycarbonate brackets (Alice) were bonded to bovine incisors with light-cured adhesive. The bracket bases were treated with one of three methods; sandblasting, plastic conditioner application, and combined treatment with sandblasting and plastic conditioner. The brackets without any surface treatment served as the control. The shear bond strength was tested with a universal testing machine, and failure pattern was assessed with the adhesive remnant index. RESULTS: The shear bond strength in all experimental groups was higher than that of the control group (p < 0.001). The group treated with plastic conditioner after sandblasting showed statistically higher shear bond strength than the sandblasting only group (p < 0.05). The group treated with plastic conditioner after sandblasting showed higher shear bond strength than plastic conditioner only group, but the difference was not statistically significant. CONCLUSION: The above results suggest that the surface treatments of polycarbonate bracket is mandatory to improve bond strength, and the most effective method is an application of plastic conditioner after sandblasting.
