A Comparative Evaluation of Flexural Strength and Hardness of Different Provisional Fixed Restorative Resins With Varied Setting Reactions – An In Vitro Study
Evaluation Of Flexural Strength And Hardness Of Different Provisional Fixed Restorative Resins
Keywords:
Flexural strength, Hardness, Provisional restorationAbstract
Aim: The aim of this research work was to compare and evaluate the hardness and flexural strength of three different commercially available fixed provisional restorative resins. Objective: The objectives of this research work are, to assess whether setting mechanism of fixed provisional restorative resins has an effect on the physical and mechanical properties and to compare and contrast the flexural strength and hardness of three different fixed provisional restorative resins viz: a) Revotek LC(visible light cure resin – GC Corporation,Tokyo,Japan), 2) Tempspan (Dual cure resin – Pentron / wallingford, CT U.S.A), and c) Integrity (Self cure resin - Dentsply Caulk, Milford, DE,U.S.A). Methods: Commercially available composite resin Revotek LC(GC India), Tempspan( Pentron), Integrity (Dentsply). Brass mould was fabricated according to ANSI standardization, and specimen size was 25x2x2 mm. Sample size was 75 (25 for each). Specimens was fabricated according to manufacture instruction. After the fabrication of specimens, was stored in artificial saliva, and then hardness & flexural strength was measured. The mean flexural strength and hardness of three materials was compared using ANOVA test and pair-Wise comparison was done using Tukey’s honesty significant (HSD) test. Results: There was statistically significant difrence found between all three provisional restorative materials for Hardness and Flexural strength. Conclusion: The highest average Hardness (Shore D) value was observed in Tempspan and lowest observed in Revotek LC and for flexural strength highest average value observed in Integrity and lowest observed in Revotek LC. [Bhargav N NJIRM 2017; 8(2):72-77]
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