International Journal of Experimental Dental Science

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VOLUME 6 , ISSUE 2 ( July-December, 2017 ) > List of Articles

RESEARCH ARTICLE

Depth-of-cure of Bulk-fill Composites Cured in Tooth or Opaque Substrate

Brent W Church, Daranee Tantbirojn, Thuydung Do, Martha H Wells, Antheunis Versluis

Citation Information : Church BW, Tantbirojn D, Do T, Wells MH, Versluis A. Depth-of-cure of Bulk-fill Composites Cured in Tooth or Opaque Substrate. Int J Experiment Dent Sci 2017; 6 (2):68-73.

DOI: 10.5005/jp-journals-10029-1159

License: CC BY 3.0

Published Online: 01-12-2010

Copyright Statement:  Copyright © 2017; The Author(s).


Abstract

Purpose

To determine the effect of substrate on the depth-of-cure determination when using hardness profiles in a covered-slot technique and to introduce a new covered-slot method that uses tooth substrates.

Materials and methods

Three bulk-fill composites and one conventional composite were tested: Tetric EvoCeram Bulk Fill, Venus Bulk Fill, Filtek Bulk Fill Flowable, Filtek Supreme Ultra. The composites were light-cured in rectangular slots (2 mm deep, 2 mm wide) made in a plaster mold or an extracted tooth. The slots were covered with an orange glass plate during curing, leaving one end exposed for light-curing. After curing, the glass plate was removed and the sample was stored in the dark for 24 hours before Vickers hardness was measured as a function of depth at 0.5-mm intervals. Results were analyzed using two-way analysis of variance (ANOVA) and pairwise comparisons (significance level 0.05).

Results

The hardness of composites cured in covered-slot molds decreased with increasing depth (p < 0.001). Bulk-filled composites cured in plaster molds had a slightly lower depth-of-cure than those cured in natural tooth substrates. Differences between the tooth and plaster substrates were significant at all depths in the “packable” bulk-fill composite (Tetric EvoCeram Bulk Fill), and were significant at ≥2.5 and ≥3.5 mm in the flowable bulk-fill composites (Filtek Bulk Fill Flowable and Venus Bulk Fill) respectively.

Conclusion

Using natural tooth substrates in the covered-slot method increased the depth-of-cure of bulk-filled composites in comparison to opaque plaster molds.

How to cite this article

Church BW, Tantbirojn D, Do T, Wells MH, Versluis A. Depth-of-cure of Bulk-fill Composites Cured in Tooth or Opaque Substrate. Int J Experiment Dent Sci 2017;6(2):68-73.


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  1. Effectiveness of polymerization in composite restoratives claiming bulk placement: impact of cavity depth and exposure time. Oper Dent 2000 Mar-Apr;25(2):113-120.
  2. Influence of placement techniques on Vickers and Knoop hardness of class II composite resin restorations. Dent Mater 2004 Oct;20(8):726-732.
  3. Depth of cure of dental resin composites: ISO 4049 depth and microhardness of types of materials and shades. Oper Dent 2008 Jul-Aug;33(4):408-412.
  4. Correlation of clinical performance with 'in vitro tests' of restorative dental materials that use polymer-based matrices. Dent Mater 2012 Jan;28(1):52-71.
  5. Tetric EvoCeram® Bulk Fill Scientific Documentation. 2014 [cited 2015 Oct 29]. Available from: http://www.ivoclarvivadent.us/p/all/composites/restorative-materials/tetric-evoceram-bulk-fill.
  6. Venus® Bulk Fill Scientific Compendium [cited 2015 Oct 29]. Available from: http://webmedia.kulzer-dental.com/media/hkg/downloads_new/venus_5/venus_bulk_fill_1/Scientific_Venus_Bulk_Fill_Compendium_GB.pdf.
  7. Filtek Bulk Fill Flowable Restorative product brochure [cited 2015 Oct 29]. Available from: http://multimedia.3m.com/mws/mediawebserver?mwsId=SSSSSu7zK1fslxtUoY_vmx_Gev7qe17zHvTSevTSeSSSSSS--&fn=Filtek_bf_brochure.pdf.
  8. Depth of cure of resin composites: is the ISO 4049 method suitable for bulk fill materials? Dent Mater 2012 May;28(5):521-528.
  9. Influence of various irradiation processes on the mechanical properties and polymerisation kinetics of bulk-fill resin based composites. J Dent 2013 Aug;41(8):695-702.
  10. Post-cure depth of cure of bulk fill dental resin-composites. Dent Mater 2014 Feb;30(2):149-154.
  11. Polymerization shrinkage stress kinetics and related properties of bulk-fill resin composites. Oper Dent 2014 Jul-Aug;39(4):374-382.
  12. Polymerization shrinkage and depth of cure of bulk fill flowable composite resins. Oper Dent 2014 Jul-Aug;39(4):441-448.
  13. Cuspal flexure, depth-of-cure, and bond integrity of bulk-fill composites. Pediatr Dent 2014 Nov-Dec;36(7):468-473.
  14. Post-irradiation hardness development, chemical softening, and thermal stability of bulk-fill and conventional resin-composites. J Dent 2015 Feb;43(2):209-218.
  15. Polymerization shrinkage and depth of cure of bulk-fill resin composites and highly filled flowable resin. Oper Dent 2015 Mar_Apr;40(2):172-180.
  16. Bulk-fill resin composites: polymerization contraction, depth of cure, and gap formation. Oper Dent 2015 Mar-Apr;40(2):190-200.
  17. Curing profile of bulk-fill resin-based composites. J Dent 2015 Jun;43(6):664-672.
  18. International Standard ISO 4049: dentistry — resin-based filling materials. 1988/Cor.1:1992 (E).
  19. New insight into the “depth of cure” of dimethacrylate-based dental composites. Dent Mater 2012 May;28(5):512-520.
  20. Correlation between hardness and degree of conversion during the setting reaction of unfilled dental restorative resins. Dent Mater 1985 Feb;1(1):11-14.
  21. Composite depth of cure obtained with QTH and LED units assessed by microhardness and micro-Raman spectroscopy. Oper Dent 2007 Jan-Feb;32(1):79-83.
  22. Shrinkage and hardness of dental composites acquired with different curing light sources. Quintessence Int 2009 Mar;40(3):203-214.
  23. Curing depths of materials polymerised by ultra-violet light. Br Dent J 1979 Jun;146(12):375-379.
  24. Characteristics of visible-light activated composite systems. Br Dent J 1984 Mar;156(6):209-215.
  25. Contemporary posterior direct composites using state-of-the-art techniques. Dent Clin North Am 2001 Jan;45(1):49-70.
  26. Cuspal deflection and depth of cure in resin-based composite restorations filled by using bulk, incremental and transtooth-illumination techniques. J Am Dent Assoc 2011 Oct;142(10):1176-1182.
  27. Light-attenuating effect of dentin on the polymerization of light-activated restorative resins. Dent Mater J 2004 Dec;23(4):467-473.
  28. Light transmittance and micro-mechanical properties of bulk fill vs. conventional resin based composites. Clin Oral Investig 2014 Nov;18(8):1991-2000.
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