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Indentationmodulus of two bulk-fill resin-based composites under simulated clinical conditions

Objectives: To assess the effect of irradiation time and distance of the light tip on the Indentationmodulus (E) of two bulk-fill resin-based composites at simulated clinically relevant filling depth.
Methods: Indentationmodulus was assessed at varying depth (0.1 to 6 mm in 100 μm steps), irradiation time (10, 20 or 40 s, 1703 mW/cm²) and distance away from the light tip (0 and 7 mm).
Results: A Student’s t-test analysed the differences of E in 0.1, 2, 4 and 6 mm depths, when the distance between curing unit and specimen’s surface increase from 0 to 7 mm. E ranged from 9.5±2.0 GPa to 15.4 ± 1.3 GPa for x-tra base and from 6.7 GPa±3.0 to 14.8 GPa±0.4 for Tetric EvoCeram Bulk Fill. The influence of material on E was significant (η²=0.080) while the parameters irradiation time, distance from the light tip and depth emphasise a stronger influence on Tetric EvoCeram Bulk Fill.
Conclusions: Both materials can be used in one step of a procedure to fill at least 4mm thick increments under clinically relevant curing conditions. Therefore, they allow a simplified and timesaving filling technic.
Division: Continental European and Scandinavian Divisions Meeting
Meeting: 2015 Continental European and Scandinavian Divisions Meeting (Antalya, Turkey)
Location: Antalya, Turkey
Year: 2015
Final Presentation ID: 0498
Abstract Category|Abstract Category(s): Dental Materials 7: Polymer-based Materials-Physical Properties and Performance
Authors
  • Kessler, Andreas  ( Dental School of the Ludwig-Maximilians-University , Munich , Germany )
  • Ilie, Nicoleta  ( Dental School of the Ludwig-Maximilians-University , Munich , Germany )
    • Financial Interest Disclosure: NONE
    SESSION INFORMATION
    Poster Session
    Dental Materials: Bull-filling
    Saturday, 10/17/2015 , 12:00PM - 01:00PM
    TABLES
    Indentationmodulus
    Indentationmodulus(GPa)
    Time (s)Depth: 0mm2mm4mm6mm
    07p07p07p07p
    Tetric EvoCeram Bulk Fill
    1012.2(1.0)12.3(1.3)0.78013.5(0.4)13.9(0.6)0.04712.8(0.4)12.7(0.5)0.5049.3(2.2)6.7(3.0)0.008
    2012.6(1.0)12.0(1.2)0.10614.5(0.5)13.4(0.5)0.00014.1(0.3)12.8(0.3)0.00011.8(0.9)10.1(1.8)0.001
    4013.5(0.6)12.7(1.0)0.01214.7(0.6)14.8(0.4)0.75714.3(0.6)14.4(0.3)0.42013.3(0.8)12.7(0.7)0.014
    x-tra base
    1014.1(2.4)12.2(0.9)0.00315.4(1.3)13.5(0.6)0.00015.0(1.0)12.8(1.0)0.00013.0(2.2)9.5(2.0)0.000
    2013.2(1.4)12.2(1.8)0.06814.6(0.6)14.6(0.7)0.85214.6(0.5)14.2(0.6)0.03713.5(1.2)11.0(1.8)0.000
    4013.4(1.7)12.1(1.3)0.01314.2(1.0)14.0(0.7)0.69714.6(0.9)14.3(1.1)0.47013.3(1.0)12.7(1.4)0.181