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

Abstract

Objective: To compare the effects of fluoride and casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) containing topical agents on shear bond strength (SBS) and fracture mode of orthodontic brackets bonded to demineralized enamel. Materials and Methods: Eighty freshly extracted human premolar teeth were randomly divided into four equal groups. The first group was the control, and no pretreatment was performed on this group. In the remaining three groups, demineralization process was performed and teeth were stored in artificial saliva. In group II, bonding was performed after demineralization. Pretreatment with fluoride and CPP-ACP gels was performed in groups III and IV, respectively. Brackets were bonded using a conventional system. The SBS of these brackets was measured and recorded in MPa. Adhesive remnant index (ARI) scores were determined after the brackets failed. Data were analyzed with analysis of variance (ANOVA), Tukey, and G-tests at the P , .05 level. Results: ANOVA comparison of four groups revealed statistically significant differences. No significant differences were found between control and CPP-ACP-treated groups. However, lower SBS values were recorded for group II (6.6 6 3.9 MPa) and group III (17.1 6 2.9 MPa). ARI scores were significantly different among the four groups (P , .001). No enamel detachment was found in the control group, and enamel detachment measured 75% for group II. Conclusions: Fluoride and CPP-ACP gel applications showed higher debonding forces compared to bonding in untreated demineralized samples. CPP-ACP pretreatment resulted in comparable SBS values compared with the control group. (Angle Orthod. 2011;81:490-495.)

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

“…Recently, we compared fluoride and CPP-ACP pretreatment on the shear bond strength (SBS) of brackets bonded to demineralized enamel. 24 CPP-ACP pretreatment resulted in SBS values that were similar to those of the control group. In the present study, the aim is to evaluate the effects of microabrasion, CPP-ACP application, and combinations of these procedures on the SBS of orthodontic brackets bonded to a demineralized enamel surface.…”

“…Clinicians may help these patients and complete their treatment with several enamel pretreatment procedures. In a recent study, 24 we evaluated the effects of CPP-ACP and fluoride applied to demineralized enamel and compared them with a control group. In that study, higher SBS was found in the control group compared to pretreated groups.…”

Effects of remineralization procedures on shear bond strengths of brackets bonded to demineralized enamel surfaces with self-etch systems

“…Although enamel detachment was seen in the groups, SEPs provide us with clinically acceptable SBS values except for the demineralization group. Demineralization of teeth decreases the quality of bonding as stated by Uysal et al 12 and Ekizer et al 14 The surface roughness of teeth and restoration correlates directly with the retention of plaque because bacteria adhere more readily to rough surfaces. The mean critical value of surface roughness for bacterial colonization has been defined as 0.2 mm.…”

“…In the studies mentioned above, natural enamel surfaces were used. On the other hand, Uysal et al 12 compared the effects of fluoride and CPP-ACP and Baysal and Uysal 13 compared the effects of microabrasion and CPP-ACP on the SBS of orthodontic brackets bonded to demineralized enamel and found no significant differences between the control and CPP-ACP groups. In both studies, pretreatment of artificially demineralized surfaces with remineralization procedures appeared to restore decreased SBS values of orthodontic brackets, which is in accordance with the findings of our study.…”

Modern Etching and Bonding Materials in Orthodontics

“…(Siverstone, 1982;Artun& Thylstrup, 1986;Øgaard & Rolla, 1988) To prevent WSL formation, topical fluoride containing mouth rinse and tooth pastes are recommended for patients and orthodontists may take precaution such as the use of fluoride-releasing adhesive materials and elastics. Daily routine use of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) containing tooth pastes (Wiltshire, 1999;Fraizer & Southard, 1996;Lefeuvre & Amjaad, 2005;Uysal & Baysal, 2011) or fluoride containing mouth rinses (Gorelick & Geiger, 1982;Jordan, 1998) have been reported to significantly inhibit the formation of WSLs. However during all of these applications, the effective use has vital importance.…”