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-33-G-Premio Bond, G-ænial, EQUIA Forte3017 Micro-tensile Bond Strength of Repaired Restorative Glass IonomerCementOral Presentation8:30 AM–8:45 AM Mar 25, 2017CC, Room 2020 Authors:Authors:SevilGurgan(Presenter)HacettepeUniversityUzayKocVural, HacettepeAbstract: Objectives: To evaluate the micro-tensile bond strength of a restorative glass ionomercement (GIC) repaired either by GIC or composite resin after different surface treatments.Methods: A hundred and twenty bar-shaped (2x2x8mm) restorative GIC (EquiaForte, GC, Tokyo, Methods: A hundred and twenty bar-shaped (2x2x8mm) restorative GIC (EquiaForte, GC, Tokyo, Japan) blocks were produced and aged (thermo cycling, 5000x). The specimens were then divided into 2 groups (n=60) and 5 subgroups (n=12) according to the repair material (GIC/ EquiaForte or composite resin/G-aenial, GC, Tokyo, Japan)) and the combination of surface treatments. The specimens in Group I were repaired with the following protocols: a –no treatment +GIC, b-diamond bur (B) + GIC, c-cavity conditioner (20 % polyacrilicacid, GC, Tokyo, Japan)+ GIC, d-cavity conditioner +universal adhesive (G-PremioBOND, GC, Tokyo, Japan) (A) + GIC, e-A+GIC; and specimens in Group II were repaired with the following protocols: a-no treatment + Composite resin(C), b-B + C, c-B + A + C, d-40% phosphoric acid protocols: a-no treatment + Composite resin(C), b-B + C, c-B + A + C, d-40% phosphoric acid + A + C, e-A + C. Specimens were then subjected to micro-tensile bond strength testing. Failure modes were evaluated using a stereomicroscope at 40X magnification. Data were analyzed using Kruskal-Wallis and Mann-Whitney-U Tests.Results: A significant difference was found between the two groups (p<0.001). Repair techniques using composite resin resulted in higher bond strengths. The lowest bond strength was obtained when additional GIC was used with the application of adhesive. The highest bond strength was obtained when GIC was roughened with diamond bur and repaired with composite resin after the application of universal adhesive.application of universal adhesive.Conclusions: Based on this laboratory study, repair of restorative GIC with composite resin appears to be preferred option to improve the micro-tensile bond strength.Disclosure Statement:The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: NONEI have read the IADR policy on licensing.Signed by UzayKocVuralSigned by UzayKocVuralReprinted with permission from the Journal of Dental Research, J Dent Res 96 (Spec Iss A):-33-abstract number 3017, https://iadr2017.zerista.com/event/member/329705, 2017