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KMID : 0361920060360050331
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Korean Journal of Orthodontics
2006 Volume.36 No. 5 p.331 ~ p.338
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The Effect of Surface Treat`ment on Bond Strength of Polycarbonate Bracket
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Kim Seok-Pil
Kim Nyeon-Kyeong
Lee Hyun-Jung
Hwang Hye-Nam
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Abstract
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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 suraace 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 to (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.
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KEYWORD
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Polycarbonate bracket, Surface treatment, Bond strength
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