A comparative study to evaluate the marginal accuracy of provisional restorations fabricated by light polymerized resin and autopolymerized resin: A scanning electron microscope study

Abstract

Background and Objectives: To compare the vertical marginal discrepancy of provisional restorations fabricated using light polymerized composite resin by direct technique and provisional restorations fabricated using auto polymerized resin by direct and indirect technique. Materials and Methods: A total of 45 provisional restorations were fabricated, 15- fabricated by using autopolymerized resin by direct technique on the metal dies and15- fabricated by indirect technique on stone dies. 15 - fabricated using light cured composite resin by direct technique on metal dies. Marginal discrepancies were calculated using scanning electron microscope (SEM). The restorations were then cemented using non-eugenol temporary cement and subjected to SEM analysis. Results: Vertical marginal discrepancy of the provisional restorations fabricated using light cured composite resin by direct technique was least when compared to the vertical marginal discrepancy of the provisional restorations fabricated using autopolymerized resin by direct and indirect technique. Among the restorations fabricated using autopolymerized resin, marginal discrepancy observed with the indirect technique was less compared to the marginal discrepancy observed with direct technique. Conclusion: The vertical marginal discrepancy of the provisional restorations fabricated using light cured composite resins by direct technique was least and had a better marginal fit compared to the provisional restorations fabricated using autopolymerized resin by direct and indirect technique. The light cured resin could be a better material used to fabricate provisional restoration with an improved marginal adaptation.