Flexural Strength of Provisional Crown and Fixed Partial Denture Resins both with and without Reinforced Fiber

Abstract

Aim: The aim of this study was to evaluate the fracture strength of various provisional crown and fixed partial denture resins using an invitro test system. Materials and Methods: Provisional crown-bridge materials (autopolymerising Poly Methyl Metacrylate (PMMA), autopolymerising Poly Ethyl Metacrylate (PEMA), bis-acryl composite resin and light cured composite resin), reinforcement materials; polyethylene fiber and glass fiber are compared. A total of 150 specimens are prepared for the flexural strength test. The specimens are divided into 5 groups according to the type of resin used (Tetric Ceram, Charisma, Dentalon Plus, TAB 2000, Protemp 3) and then each group was divided into 3 subgroups according to the type of fiber reinforcement (Construct, Fiber-splint ML). Unreinforcement specimens served as the control. Specimens are loaded in a universal testing machine until the point of fracture. The mean flexural strength (MPa) was compared using one-way analysis of variance, followed by Duncan's multiple range tests. Results: The highest average flexural strength value was found in the Charisma with Construct fiber reinforcement (442.00 MPa). The lowest average flexural strength value was found in the Dentalon Plus without fiber reinforcement (70.50 MPa). There was significant difference between Fiber-splint ML, Construct and control group. Conclusion: Dentalon Plus without fiber reinforcement. There was significant difference between Fiber-splint ML, Construct and control group.