Caracterização de um novo material restaurador temporário fotopolimerizável

Abstract

The aim of this study was to characterization a provisional restorative material. The specific objectives were: 1) to evaluate the physic- mechanical and microbiological effect of commercial references; 2) evaluated the mechanical properties and microbiological effect after incorporation of zinc methacrylate in experimental materials. The commercial reference were used; Bioplic(B), Fill Magic Tempo (FM), Fermit-N (F), luxatemp (L) and Revotek LC (R). For the experimental materials were added different concentrations of zinc methacrylate; 0% (control), 0,5%, 1%, 2%, and 5%. The mechanical test were performed; microleakage (ML) water sorption and solubility (SW/SL) degree of conversion (DC) depth of cure (D),ultimate tensile strength (UTS), shore D hardness(SH). The microbiological tests were biofilm accumulation of S. mutans (BT), direct contact test after 1h (DCT-1) and 24 h (DCT- 24), and cytotoxicity assay(CA). The findings of our study were grouped in: Part 1, comparisons among commercial references and Part 2, evaluation of experimental materials with different zinc methacrylate concentrations. All data were analyzed with Sigma Stat statistical program, version 3.5. Statistical comparisons were performed at a significance level of 5%. The B showed higher SW, D and lower ML and DCT- 1h. The R presented higher UTS, SH; and lower SW/SL and D. The L was more cytotoxic than other group. Zinc methacrylate incorporated in experimental materials not affect the mechanical properties neither the biocompatibility and presented antibacterial effect in DCT-1h. Zinc methacrylate improved the main mechanical properties however no showed prolonged antibacterial effect in tested concentrations.