The effect of casein phosphopeptide amorphous calcium phosphate on the in vitro shear bond strength of orthodontic brackets.
10.4041/kjod.2013.43.1.23
- Author:
Sun Youn PARK
1
;
Jung Yul CHA
;
Kyoung Nam KIM
;
Chung Ju HWANG
Author Information
1. Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, Korea.
- Publication Type:In Vitro ; Original Article
- Keywords:
CPP-ACP;
Shear bond strength;
Self-etching primer;
Bracket
- MeSH:
Adhesives;
Bicuspid;
Calcium;
Calcium Phosphates;
Caseins;
Dental Enamel;
Hand;
Humans;
Microscopy, Electron, Scanning;
Orthodontic Brackets;
Phosphoric Acids;
Tooth
- From:The Korean Journal of Orthodontics
2013;43(1):23-28
- CountryRepublic of Korea
- Language:English
-
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: CPP-ACP 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.
