Park Sun-Youn, Cha Jung-Yul, Kim Kyoung-Nam, Hwang Chung-Ju
Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, Korea.
Korean J Orthod. 2013 Feb;43(1):23-8. doi: 10.4041/kjod.2013.43.1.23. Epub 2013 Feb 26.
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.
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.
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.
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.
本研究旨在评估酪蛋白磷酸肽无定形磷酸钙（CPP-ACP）对用磷酸酸蚀或自酸蚀底漆粘结到未脱矿牙齿上的托槽剪切粘结强度（SBS）的影响。
60颗人前磨牙随机分为4个治疗组中的1组（每组n = 15）：磷酸酸蚀（第1组）；自酸蚀底漆（第2组）；CPP-ACP处理2周 + 磷酸酸蚀（第3组），以及CPP-ACP处理2周 + 自酸蚀底漆（第4组）。上颌前磨牙金属托槽粘结后，将标本在试验机中施加剪切力。使用扫描电子显微镜观察所有牙齿釉质表面的酸蚀模式。采用双向方差分析来测试CPP-ACP和酸蚀系统对SBS的影响。
在进行磷酸酸蚀的组（即第1组和第3组；p < 0.05）中观察到平均SBS显著更高。另一方面，SBS似乎不受CPP-ACP的影响（即第3组和第4组；p > 0.05）。我们在磷酸酸蚀组的釉质表面观察到均匀且清晰的酸蚀模式。
无论使用哪种粘结方法粘结托槽，CPP-ACP均不会显著影响粘结到未脱矿牙齿上的正畸托槽的SBS。
