Durabilidade da união de resinas compostas tradicionais e bulk fill de diferentes viscosidades em cavidades dentinárias com alto fator C

Abstract

Introduction: Restorative and aesthetic dentistry uses restorative materials to perform various procedures; however, the restorative protocol of traditional composite resins still generates problems that affect restoration union resistance (UU) and time of clinical procedure, which stimulates the emergence of new materials and techniques for restorative procedures. Objectives: To evaluate the bond strength of traditional composite resins and bulk fill with different viscosities in conical truncated dentin cavities with high factor C. Method: 9 resin composites (3 traditional filtek Z250 XT (FZXT), Tetric N-Ceram (FBFF), Tetric N-Flow (NFBFF) and X-tra Base (XBBFF)] and 3 moldable bulk fillers (Filtek One (FOBF), Tetric N-Ceram Bulk Fill (NCBF) and Admira Fusion X-tra (AFXT)), in order to restore 180 specimens (n = 10) of bovine teeth, containing in these specimens tridimensional conical trunk cavities (5.5 mm in diameter superior, 4.5 mm of inferior diameter and 4 mm of height) with high factor C. The 180 specimens were submitted to the test by push-out, 90 of them after 24 hours and others 90 after 6 months of aging, both times stored in distilled H 2 O at 37 ° C. Results: There were statistically significant differences (p <0.01) when comparing the types of composites, however, for the different aging times there was no (p> 0.05). The AFXT Group presented statistically significant results, obtaining the best results for the two times, whereas the groups FBFF, NFBFF and XBBFF (bulk fill flow) had the lowest union strength. The traditional composite and bulk fill groups have similar results. Conclusion: The groups with the bulk fill flow resins presented the lowest RU, however, the traditional fillable and resilient bulk fill resins showed similar results, proving that the dental surgeon can use modelable bulk fill resins without compromising the restorative RU.