Keywords
Resina humectante; Estabilidad de color; Microdureza; Resinas compuestas.
How to Cite
Abstract
Objective: The aim of this study was to evaluate and compare the effects of the superficial application of two different modeling resins on the surface microhardness and discoloration of composite resins. Material and Methods: The present study used two different composites and modeling resins. The composites were placed in plastic molds. Subsequently, the modeling resins were applied on the surface of the two composite groups. The microhardness and color pertaining to all the groups were evaluated. The current study used the One-Way ANOVA and Kruskal Wallis tests, in order to perform the statistical evaluation (p<0.05). Results: The present study compared the microhardness pertaining to the groups and the highest microhardness values were observed in the Estelite Asteria group (none), whereas the lowest values were observed in the GC Essentia group (Ultradent). Moreover, the current study evaluated the color stability and the greatest discoloration was observed in the control group of the GC Essentia group, whereas the least discoloration was observed in the Estelite Asteria group that included the samples prepared using Ultradent Wetting Resin. Conclusions: The results of the present study demonstrated that the use of modeling resins, which facilitate the placement of composite resins, reduced the microhardness and discoloration of composite resins. The aforementioned effect can be attributed to the variations in the structure of the filling. However, further studies are warranted to support and verify the results of the current study.
References
Sedrez-Porto J.A., Münchow E.A., Brondani L.P., Cenci M.S., Pereira-Cenci T. Effects of modeling liquid/resin and polishing on the color change of resin composite. Braz. Oral Res. 2016; 30 (1): 88-96.
Frauscher K.E., Ilie N. Depth of cure and mechanical properties of nano-hybrid resin-based composites with novel and conventional matrix formulation. Clin Oral Investig. 2012; 16 (5): 1425-1434.
Chang H.S., Hong S.O. Effects of layering technique on the shade of resin overlays and the microhardness of dual cure resin cement. Braz Oral Res. 2014; 28 (1): 1-6
de Paula F.C., Valentin R.D.S., Borges B.C.D., Medeiros M.C.D.S., de Oliveira R.F., da Silva A.O. Effect of instrument lubricants on the surface degree of conversion and crosslinking density of nanocomposites. J Esthet Restor Dent. 2016; 28 (2): 85-91.
Tuncer S., Demirci M., Tiryaki M., Ünlü N., Uysal Ö. The effect of a modeling resin and thermocycling on the surface hardness, roughness, and color of different resin composites. J Esthet Restor Dent. 2013; 25 (6): 404-419.
Barcellos D.C., Pucci C.R., Torres C.R.G., Goto E.H., Inocencio AC. Effects of resinous monomers used in restorative dental modeling on the cohesive strength of composite resin. J Adhes Dent. 2008;10 (5): 351-354.
Muenchow E.A., Sedrez-Porto J.A., Piva E., Pereira-Cenci T., Cenci MS. Use of dental adhesives as modeler liquid of resin composites. Dent Mater. 2016; 32 (4); 570-577.
Toledano M., Cabello I., Yamauti M., Giannini M., Aguilera F.S., Osorio E., Osorio R. Resistance to degradation of resin-dentin bonds produced by one-step self-etch adhesives. Microsc Microanal. 2012; 18 (6): 1480-1493.
Araujo F.S., Barros M.C.R., Santana M.L.C., de Jesus Oliveira L.S., Silva PFD, Lima G.D.S., Faria e Silva AL. Effects of adhesive used as modeling liquid on the stability of the color and opacity of composites. J Esthet Restor Dent. 2018; 30 (5): 427-433.
Chinelatti M.A., Chimello D.T., Ramos R.P., Palma-Dibb R.G. Evaluation of the surface hardness of composite resins before and after polishing at different times. J Appl Oral Sci. 2006; 14:188-92.
Rueggeberg F.A., Craig R.G. Correlation of parameters used to estimate monomer conversion in a light-cured composite. J Dent Res. 1988; 67: 932-7
Yeh S.T., Wang H.T., Liao H.Y., Su S.L., Chang C.C., Kao H.C., Lee B.S. The roughness, microhardness, and surface analysis of nanocomposites after application of topical fluoride gels. Dent Mater. 2011; 27: 187-96.
Erdemir U., Sancakli H.S., Yildiz E. The effect of one-step and multi-step polishing systems on the surface roughness and microhardness of novel resin composites. Eur J Dent. 2012; 6 (2):198-205.
Lombardini M., Chiesa M., Scribante A., Colombo M., Poggio C. Influence of polymerization time and depth of cure of resin composites determined by Vickers hardness. Dent Res J. 2012; 9 (6): 735-40.
Takabayashi Y. Characteristics of denture thermoplastic resins for non-metal clasp dentures. Dent Mater J. 2010; 29: 353-61.
Kang A., Son S.A., Hur B., Kwon Y.H., Ro J.H., Park J.K. The color stability of silorane- and methacrylate-based resin composites. Dent Mater J. 2012; 31: 879-84.
Ergücü Z., Türkün L.S., Aladag A. Color stability of nanocomposites polished with one-step systems. Oper Dent. 2008; 33: 413-20.
Lee Y.K., Yu B., Lee S.H., Cho M.S., Lee C.Y., Lim H.N. Shade compatibility of esthetic restorative materials-A review. Dent Mater. 2010; 26: 1119-26.
Ertaş E., Güler A.U., Yücel A.C., Köprülü H., Güler E. Color stability of resin composites after immersion in different drinks. Dent Mater J. 2006; 25: 371-6.
Bagheri R., Burrow M.F., Tyas M. Influence of food simulating solutions and surface finish on susceptibility to staining of aesthetic restorative materials. J Dent. 2005; 33: 389-98.
Lu H., Roeder L.B., Lei L., Powers J.M. Effect of surface roughness on stain resistance of dental resin composites. J Esthet Restor Dent. 2005;17: 102-8.
Sedrez-Porto J.A., Münchow E.A., Cenci M.S., Pereira-Cenci T. Translucency and color stability of resin composite and dental adhesives as modeling liquids-A one-year evaluation. Brazilian oral research. 2017; 31: 54-62.