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Degree of Conversion and Depth of Cure of Bulkfill Composites

Objectives: The aim of this study was to evaluate the degree of conversion, and depth of cure of four bulk-fill composites.
Methods: Four bulk-fill composites (Reveal Bulk, Bisco; Filtek Restorative, 3M ESPE; Beautifil Restorative, Shofu; X-Tra Fill , Voco.) were used. Depth of cure was measured with ISO 4049 methods: After the materials were light-cured (40sec/500mw/cm2), the uncured part was removed with the plastics spatula. The height of the cylinder of cured material was measured and divided by two. Degree of conversion (DC) was determined using Fourier transform infrared spectroscopy (FTIR) at different depth (0,1,2,3,4,5mm) of composites, which were light-cured from top (40sec/500mw/cm2). Data were analyzed by ANOVA and t-test.
Results: Mean (standard deviation) of depth of cure (n=3) and polymerization of degree of conversion (%) (n=1) are shown in the table.
Conclusions: Not all of the bulk-fill composites had depth of cures more than 4 mm. Degree of conversions of all of the bulk-fill composites decreased as depth increased.
Division: AADR/CADR Annual Meeting
Meeting: 2018 AADR/CADR Annual Meeting (Fort Lauderdale, Florida)
Location: Fort Lauderdale, Florida
Year: 2018
Final Presentation ID: 1629
Abstract Category|Abstract Category(s): Dental Materials 2:Polymer-based Materials
Authors
  • Chen, Liang  ( BISCO, Inc. , Schaumburg , Illinois , United States )
  • Fuessle, Grant  ( BISCO, Inc. , Schaumburg , Illinois , United States )
  • Suh, Byoung  ( BISCO, Inc. , Schaumburg , Illinois , United States )
    • Financial Interest Disclosure: The authors are Bisco employees.
    SESSION INFORMATION
    Poster Session
    Dental Materials: Polymer-based Materials IV
    Saturday, 03/24/2018 , 11:00AM - 12:15PM
    TABLES
    Mean (standard deviation) of depth of cure and polymerization of degree of conversion (%)
    COmpositeReveal BulkFiltek BulkBeautifilX-Tra Fil
    Depth of Cure (mm)6.01 (0.01) A3.75 (0.02) C4.15 (0.11) B3.50 (0.13) D
    Degree of Conversion (0-mm)61.0%54.2%40.8%50.7%
    Degree of Conversion (1-mm)58.7%54.1%39.6%50.6%
    Degree of Conversion (2-mm)57.0%51.3%39.0%49.8%
    Degree of Conversion (3-mm)54.4%49.2%34.5%47.6%
    Degree of Conversion (4-mm)51.4%45.0%27.2%44.8%
    Degree of Conversion (5-mm)48.0%37.8%13.0%27.8%
    Means with different letters are statistically different (p<0.05).