Effects of CPP-ACP Paste on the Shear Bond Strength of Orthodontic Brackets

Abstract

Objective:To evaluate the effect of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) paste on shear bond strength and debonding failure modes of orthodontic brackets. Materials and Methods: Freshly extracted premolars were randomly divided into four groups (n ϭ18) as follows: in groups 1 and 3, the enamel was treated with a solution of CPP-ACP dissolved in artificial saliva; groups 2 and 4 served as controls, and the enamel was treated with artificial saliva. After conventional acid etching, in groups 1 and 2, brackets were bonded using a light-cured bonding system (Blugloo); while in groups 3 and 4, brackets were bonded using a conventional bonding system (Unite Bonding Adhesive). Bonded specimens were subjected to thermal cycling for 1000 cycles before debonding procedures. After debonding, teeth and brackets were examined under a stereomicroscope at 10ϫ magnification to determine whether any adhesive remained, in accordance with the adhesive remnant index. The acid-etched enamel surfaces were also observed using scanning electron microscopy after treatment with and without CPP-ACP paste. Results:The shear bond strengths of group 1 were significantly higher than those seen in group 2 (P Ͻ .01). There was no significant difference in the shear bond strengths of groups 3 and 4 (P Ͼ .05). Scanning electron microscopic observation showed that the pretreated enamel surface was rougher than that of the control surface after acid etching. Conclusion:The use of CPP-ACP can be considered as an alternative prophylactic application in orthodontic practice since it did not compromise bracket bond strength. (Angle Orthod. 2009; 79:945-950.)

Resin Bonding using Etch-and-Rinse and Self-etch Adhesives to Decalcified Deciduous Enamel after Bioactive Glass Air Abrasion

“…They carried out an optical profilometric study of changes in enamel surface roughness during in vitro demineralization. They reported that although the overall tooth surface characteristics remain unchanged after demineralization, subtle surface features become more prominent as a result of an increase in surface roughness, 23 possibly consistent with the results of the present study indicating that an increase in surface roughness of enamel in decalcified groups resulted in a higher bond strength for composite resin. Baysal et al 24 evaluated the effect of microabrasion and casein phosphopeptide-amorphous calcium phosphate on the shear bond strength of orthodontic brackets to demineralized enamel.…”

Do enamel microabrasion and casein phosphopeptide-amorphous calcium phosphate affect shear bond strength of orthodontic brackets bonded to a demineralized enamel surface?

“…Tabrizi and Cakirer 27 reported no statistically significant difference between control and CPP-ACP only or CPP-ACP plus fluoride-pretreated groups. Xiaojun et al 28 reported higher SBS in the CPP-ACPapplied group in cases where light-cure adhesives were used. However, they determined that the fluoride pretreated group showed significantly lower SBS.…”

Do fluoride and casein phosphopeptide–amorphous calcium phosphate affect shear bond strength of orthodontic brackets bonded to a demineralized enamel surface?

“…Several investigators have evaluated the effects of fluoride and CPP-ACP products [21][22][23][24]28 on the SBS of orthodontic brackets. But in all but one of the studies, 28 these agents were used for prophylactic purposes; in the study of Keles, 28 CPP-ACP solutions were used after the demineralization process.…”

“…[17][18][19][20] Keçik et al 21 compared the effects of CPP-ACP and acidulated phosphate fluoride on SBS values and found higher SBS values for all test groups. Xiaojun et al 22 reported higher SBS in the CPP-ACP-applied group when light-cure adhesives were used. Moule et al 23 showed decreased SBS values after the combined use of carbamide peroxide and CPP-ACP applications.…”