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:: Volume 26, Issue 3 (7-2014) ::
J Iran Dent Assoc 2014, 26(3): 208-213 Back to browse issues page
Effect of Nano-Hydroxyapatite Incorporation into Resin Modified Glass Ionomer Cement on Ceramic Bracket Debonding
Mohsen Nuri Sari1 , Elahe Seyed Tabaii * 2, Abbas Salehi Vaziri1 , Hasanali Ghaffari1 , Mehdi Araghbidi Kashani1 , Gholamreza Eslami Amirabadi1
1- Assistant Professor, Department of Orthodontic, School of Dentistry, Shahed University. Tehran, Iran
2- Resident, Department of Orthodontic, School of Dentistry, Shahed University. Tehran, Iran , e.seirtabaei@shahed.ac.ir
Abstract:   (7971 Views)

  Background and Aim : Preventing enamel demineralization around brackets is a concern for orthodontists. Fluoride releasing materials have been recommended to overcome this problem. The aim of this study was to evaluate the effect of incorporating nano-hydroxyapatite (NHA) into resin modified glass ionomer cements (RMGIC) on ceramic bracket debonding .

  Materials and Methods : In this experimental study, 80 human premolars were divided into 4 bonding groups as follows: group 1: Transbond XT (control group), group 2: Fuji II LC (RMGIC), group 3: 5% NHA added to RMGIC and group 4 10% NHA added to RMGIC. After enamel etching, ceramic brackets were bonded. The shear bond strength (SBS) and the adhesive remnant index (ARI) were calculated for each group. The data were analyzed using one-way ANOVA, Tukey’s post hoc HSD test and the Kruskal Wallis test .

  Results : According to ANOVA, 10% NHA added to RMGIC had a significantly lower SBS compared to other groups (11.93±2.11) but no significant difference was found among the remaining groups. The mean SBS was 17.33±4.07 in group 1, 17.22±3.55 in group 2 and 16.56±2.59 in group 3. According to ARI, the predominant failure mode in RMGIC groups was cohesive .

  Conclusion: Resin modified glass ionomer cements containing 5% NHA can be as effective as composite resins for bonding ceramic brackets .
Keywords: Resin modified glass ionomer cement, Nano-hydroxyapatite, Ceramic brackets
Full-Text [PDF 156 kb]   (2508 Downloads)    
Type of Study: Original | Subject: Orthodontics
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Nuri Sari M, Seyed Tabaii E, Salehi Vaziri A, Ghaffari H, Araghbidi Kashani M, Eslami Amirabadi G. Effect of Nano-Hydroxyapatite Incorporation into Resin Modified Glass Ionomer Cement on Ceramic Bracket Debonding. J Iran Dent Assoc 2014; 26 (3) :208-213
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Volume 26, Issue 3 (7-2014) Back to browse issues page
Journal of Iranian Dental Association

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