Author(s)

Carrilho Eunice, Abrantes Margarida, Casalta-Lopes João, Botelho Filomena, Paula Anabela, Ambrósio Pedro, Marto Carlos Miguel, Rebelo Diana, Marques Joana, Polido Mário, Ferreira Manuel Marques

Faculty of Medicine, University of Coimbra, Coimbra, Portugal.

Introduction: The composite SonicFillTM (Kerr/Kavo) is indicated for posterior restorations, with a single increment up to 5 mm due to reduced polymerization shrinkage, thus reducing working time. Aim: Evaluation of marginal microleakage with SonicFillTM. Method and Materials: There were sectioned sixty noncarious human molars in the occluso-cervical direction. Class V cavities were prepared on each tooth with gingival margin walls in a standardized way. The specimens were divided into 4 groups: group 1—restored with SonicFill^TM (Kerr/Kavo), group 2—restored with Filtek^TM SupremeXTE (3M ESPE), group 3—the cavities were not restored; group 4—restored with SonicFill^TM (Kerr/Kavo). In groups 1, 2 and 4 the enamel was conditioned with 37% orthophosphoric acid and applied the self-etch adhesive system Clear- fill^TM SE BOND (Kuraray). The specimens were stored in distilled water at 37?C for 7 days. After, the specimens, were immersed in a solution of 99mTc-Pertechnetate and the radioactivity was assessed with a gamma camera. The nonparametric Kruskal-Wallis and Mann-Whitney test with Bonferroni correction at a significance level of 5% were used for the statistical analyses. Results: There are significant differences between the positive and negative control groups and between these and experimental groups (p < 0.05). There are no statistically significant differences between the specimens restored with SonicFill^TM and Filtek^TM SupremeXTE. Conclusion: The new composite SonicFill^TM and Filtek^TM SupremeXTE showed no difference concerning dye penetration. The Sonic- Fill^TM restorative system showed no influence in concerning microleakage.

Posterior resin Composites; Composite Restorations; Polymerization Stress; Polymerization Shrinkage; Microleakage; Thermocycling

Eunice, C. , Margarida, A. , João, C. , Filomena, B. , Anabela, P. , Pedro, A. , Miguel, M. , Diana, R. , Joana, M. , Mário, P. and Marques, F. (2012) ^99mTc in the evaluation of microleakage of composite resin restorations with SonicFill^TM. An in vitro experimental model. Open Journal of Stomatology, 2, 340-347. doi: 10.4236/ojst.2012.24058.