The effect of casein phosphopeptide amorphous calcium phosphate on the in vitro shear bond strength of orthodontic brackets
Park Sun-Youn, 차정열, 김경남, 황충주,
소속 상세정보
( Park Sun-Youn ) - Yonsei University College of Dentistry Department of Orthodontics
차정열 ( Cha Jung-Yul ) - Yonsei University College of Dentistry Department of Orthodontics
김경남 ( Kim Kyoung-Nam ) - Yonsei University College of Dentistry Research Institute of Dental Biomaterials and Bioengineering
황충주 ( Hwang Chung-Ju ) - Yonsei University College of Dentistry Department of Orthodontics
KMID : 0361920130430010023
Abstract
Objective: The purpose of this study was to evaluate the effect of casein phosphopeptide amorphous calcium phosphate (CPP-ACP) on the shear bond strength (SBS) of brackets bonded to non-demineralized teeth with either phosphoric acid etching or self-etching primer. Methods: Sixty human premolars were randomly assigned to 1 of 4 treatment groups (n = 15 each): phosphoric acid etching (group 1); self-etching primer (group 2); CPP-ACP for 2 weeks + phosphoric acid etching (group 3), and CPP-ACP for 2 weeks + self-etching primer (group 4). After bonding of the maxillary premolar metal brackets, specimens were subjected to shear forces in a testing machine. Scanning electron microscopy was used to observe etching patterns on the enamel surfaces of all teeth. A 2-way analysis of variance was used to test for effects of CPP-ACP and etching system on SBS. Results: Significantly higher mean SBSs were observed in groups subjected to phosphoric acid etching (i.e. , groups 1 and 3; p < 0.05). On the other hand, SBSs did not appear to be influenced by CPP-ACP (i.e., groups 3 and 4; p > 0.05). We observed a uniform and clear etched pattern on the enamel surface of the phosphoric acid etching groups. Conclusions: CPPACP does not significantly affect the SBS of orthodontic brackets bonded to non-demineralized teeth, regardless of which adhesive method is used to bond the brackets.
키워드
CPP-ACP; Shear bond strength; Self-etching primer; Bracket
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