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KMID : 0362720120500070394
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Journal of the Korean Dental Association
2012 Volume.50 No. 7 p.394 ~ p.406
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Adhesion of Streptococcus mutans and Streptococcus sobrinus sobrinus to different types of self-ligating brackets
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Yang Pil-Seung
Yu Yoon-Jeong
Cha Jung-Yul
Hwang Chung-Ju
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Abstract
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Objective: The adhesion capabilities of different types of self-ligating brackets were measured with respect to Streptococcus mutans and Streptococcus sobrinus.
Methods: Five types of self-ligating brackets (Clippy-C; Mini Clippy; Clarity-SL; Speed; Damon 3) were used for the experiment group and composite resin brackets (Spirit-MB), metal brackets (Victory) and polycrystalline alumina brackets (Clarity) were used for the control group. In order to assess adhesion of bacteria to the brackets, the brackets were cultured for 3, 6 and 24 hours in media containing bacteria and 20% sucrose.
Results: There was no statistic difference in adhesion amount of Streptococcus mutans and Streptococcus sobrinus according to the types of brackets. A total adhesion amount according to bracket type was different. An extended incubation time increased adhesion amount. Observation under scanning electron microscope showed that Streptococcus sobrinus adhered more to Clippy-C and Victory rather than to Clarity-SL.
Conclusions: Clarity-SL, a self-ligating esthetic bracket was confirmed to show lower bacterial adhesion to cariogenic bacteria, Streptococcus mutans and Streptococcus sobrinus group than other self-ligating brackets or conventional brackets, which suggests that proper use of self-ligating esthetic brackets might even be better in preventing tooth surface decalcification.
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KEYWORD
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Streptococcus mutans, Streptococcus sobrinus, Self-ligating bracket, Bacterial adhesion
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