Resumo

TARON DUNOYER, A. et al. Comparison of surface hardness of different types of restoratives materials in premolars birradiculares, a in vitro study. Av Odontoestomatol [online]. 2015, vol.31, n.6, pp.355-361. ISSN 2340-3152.  https://dx.doi.org/10.4321/S0213-12852015000600003.

Objective: To evaluate and compare the surface hardness on restorations with glass ionomer and composite resin in Class I cavities according to Black in birradiculares premolars. Methods: Descriptive, comparative In Vitro study, in which the hardness of two types of restorative materials was measured was performed in cavities class I at two different depths designed in 32 birradiculares premolars, which were divided into 4 groups with different including features, either by the restorative material (glass ionomer, composite resin) or the depth of the cavity (2-4 mm), all specimens from each group were subjected to a vertical force through the texturometer monitored to generate the fracture of the material. To assess normal data obtained were subjected to the test Shapiro Wilk to reject the null hypothesis, while the total data analysis was performed using Student's t-test for independent samples. Results: Evaluated the hardness of the resin at 2 and 4 mm and the glass ionomer to the same depths, showing a statistical difference in favor of the composite resin Vs glass ionomer both depths (p=0.000001445 p=2.99E-9) and intragroup comparison showing only significant difference between the two groups at different depths resin (p=0.016). Conclusion: Of the materials tested in this comparative hardness study, the dental organs with cavities 4 mm depth were restored with Tetric N-Ceram have greater hardness than Vitremer 2 and 4 mm and the same resin to 2 mm depth.

Palavras-chave : Resin; glass ionomer; restorative materials; rheological tests.

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