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VOLUME 16 , ISSUE 5 ( May, 2015 ) > List of Articles

RESEARCH ARTICLE

Effect of Different Thicknesses of Pressable Ceramic Veneers on Polymerization of Light-cured and Dual-cured Resin Cements

Seok-Hwan Cho, Arnaldo Lopez, David W Berzins, Soni Prasad, Kwang Woo Ahn

Citation Information : Cho S, Lopez A, Berzins DW, Prasad S, Ahn KW. Effect of Different Thicknesses of Pressable Ceramic Veneers on Polymerization of Light-cured and Dual-cured Resin Cements. J Contemp Dent Pract 2015; 16 (5):347-352.

DOI: 10.5005/jp-journals-10024-1688

Published Online: 01-05-2015

Copyright Statement:  Copyright © 2015; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

This study evaluated the effects of ceramic veneer thicknesses on the polymerization of two different resin cements.

Materials and methods

A total of 80 ceramic veneer disks were fabricated by using a pressable ceramic material (e.max Press; Ivoclar Vivadent) from a Low Translucency (LT) ingot (A1 shade). These disks were divided into light-cured (LC; NX3 Nexus LC; Kerr) and dual-cured (DC; NX3 Nexus DC; Kerr) and each group was further divided into four subgroups, based on ceramic disk thickness (0.3, 0.6, 0.9, and 1.2 mm). The values of Vickers microhardness (MH) and degree of conversion (DOC) were obtained for each specimen after a 24-hour storage period. Association between ceramic thickness, resin cement type, and light intensity readings (mW/cm2) with respect to microhardness and degree of conversion was statistically evaluated by using analysis of variance (ANOVA).

Results

For the DOC values, there was no significant difference observed among the LC resin cement subgroups, except in the 1.2 mm subgroup; only the DOC value (14.0 ± 7.4%) of 1.2 mm DC resin cement had significantly difference from that value (28.9 ± 7.5%) of 1.2 mm LC resin cement (p < 0.05). For the MH values between LC and DC resin cement groups, there was statistically significant difference (p < 0.05); overall, the MH values of LC resin cement groups demonstrated higher values than DC resin cement groups. On the other hands, among the DC resin cement subgroups, the MH values of 1.2 mm DC subgroup was significantly lower than the 0.3 mm and 0.6 mm subgroups (p < 0.05). However, among the LC subgroups, there was no statistically significant difference among them (p > 0.05).

Conclusion

The degree of conversion and hardness of the resin cement was unaffected with veneering thicknesses between 0.3 and 0.9 mm. However, the DC resin cement group resulted in a significantly lower DOC and MH values for the 1.2 mm subgroup.

Clinical Significance

While clinically adequate polymerization of LC resin cement can be achieved with a maximum 1.2 mm of porcelain veneer restoration, the increase of curing time or light intensity is clinically needed for DC resin cements at the thickness of more than 0.9 mm.

How to cite this article

Cho S-H, Lopez A, Berzins DW, Prasad S, Ahn KW. Effect of Different Thicknesses of Pressable Ceramic Veneers on Polymerization of Lightcured and Dual-cured Resin Cements. J Contemp Dent Pract 2015;16(5):347-352.


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  1. Influence of ceramic thickness on the polymerization of light cured resin cement. J Prosthet Dent 1990 Mar;63(3):295-300.
  2. Restorative dental materials. St Louis: Mosby 2002;11:p 251.
  3. Comparison of two heatpressed all-ceramic dental materials. Dent Mater 2000 Nov;16(6):389-395.
  4. The biaxial flexural strength of two pressable ceramic systems. J Dent 1999 Mar;27(3):183-196.
  5. Influence of visible-light exposure on colour stability of current dualcurable luting composites. J Oral Rehabil 2002 Apr;29(4):387-393.
  6. Properties of dual-curable luting composites polymerized with single and dual curing modes. J Oral Rehabil 2003 Oct;30(10):1015-1021.
  7. Thermal analysis on the cure speed of dual cured resin cements under porcelain inlays. J Oral Rehabil 2001 Feb;28(2):186-197.
  8. The influence of light exposure on polymerization of dual-cure resin cements. Oper Dent 1 1993 Mar-Apr;18(2):48-55.
  9. Degree of double bond conversion in light-cured composites. Dent Mater 1987 Feb;3(1):19-25.
  10. Post-irradiation polymerization of visible light-activated composite resin. J Dent Res 1983 Mar;62(3):363-365.
  11. Factors contributing to the incompatibility between simplified-step adhesives and chemically-cured or dual-cured composites. Part III. Effect of acidic resin monomers. J Adhes Dent 2003 Winter;5(4):267-282.
  12. Correlation of cytotoxicity, filler loading and curing time of dental composites. Biomaterials 1991 Oct;12(8):737-740.
  13. Effects of curing tip distance on light intensity and composite resin microhardness. Quintessence Int 1993 Jul;24(7):517-521.
  14. Color stability of resin matrix restorative materials as a function of the method of light activation. Eur J Oral Sci 2004 Jun;112(3):280-285.
  15. In vitro and in vivo studies on the toxicity of dental resin components: a review. Clin Oral Investig 2008 Mar;12(1):1-8.
  16. Post-irradiation polymerization of different anterior and posterior visible light-activated resin composites. Dental Mater 1992 Sep;8(5):299-304.
  17. Effect of different light curing methods on mechanical and physical properties of resincements polymerized through ceramic discs. J Appl Oral Sci 2011 Aug;19(4):403-412.
  18. Hardness and diametral tensile strength of a hybrid composite resin polymerized with different modes and immersed in ethanol or distilled water media. Dent Mater 2005 Dec;21(12):1098-1103.
  19. Early hardness and shear bond strength of dual cure resin cement light cured through resin overlays with different dentin layer thicknesses. Oper Dent 2014 Jul-Aug;39(4):398-406.
  20. Hardness development of dual-cured resin cements through different thicknesses of ceramics. Dent Mater J 2006 Mar;25(1):132-137.
  21. Comparison of photo-activation versus chemical or dual-curing of resinbased luting cements regarding flexural strength, modulus and surface hardness. J Oral Rehabil 2001 Nov;28(11):1022-1028.
  22. Hardening of dual-cured cements under composite resin inlays. J Prosthet Dent 1991 Aug;66(2):187-192.
  23. Mechanical properties of resin cements with different activation modes. J Oral Rehabil 2002 Mar;29(3):257-262.
  24. Time reduction of light curing: Influence on conversion degree and microhardness of orthodontic composites. Am J Orthod Dentofacial Orthop 2014 Jul;146(1):40-46.
  25. Influence of the feldspathic ceramic thickness and shade on the microhardness of dual resin cement. Oper Dent 2006 May-Jun;31(3):384-389.
  26. Correlation between hardness and degree of conversion during the setting reaction of unfilled dental restorative resins. Dent Mater 1985 Feb;1(1):11-14.
  27. Correlation of parameters used to estimate monomer conversion in a light-cured composite. J Dent Res 1988 Jun;67(6):932-937.
  28. Degree of conversion of two dual-cured resin cements light-irradiated through zirconia ceramic disks. J Adv Prosthodont 2013 Nov;5(4):464-470.
  29. Influence of the curing mode on the degree of conversion of a dual-cured self-adhesive resin luting cement beneath ceramic. Acta Odontol Scand 2013 May-Jul;71(3-4):444-448.
  30. Calibration of FTIR conversion analysis of contemporary dental resin composites. Dent Mater 1990 Oct;6(4):241-249.
  31. Influence of viscosity and curing mode on degree of conversion of dual-cured resin cements. Eur J Dent 2013 Jan;7(1):81-85.
  32. Degree of conversion of dual-cure luting resins light-polymerized through various materials. Acta Odontol Scand 2007 Aug;65(4):201-205.
  33. Curing efficiency of various resin-based materials polymerized through different ceramic thicknesses and curing time. J Adv Prosthodont 2011 Sep;3(3):126-231.
  34. Influence of ceramic thickness on mechanical properties and polymer structure of dual-cured resin luting agents. Dent Mater 2008 May;24(5):594-599.
  35. Influence of composite inlay/onlay thickness on hardening of dual-cured resin luting agents. J Can Dent Assoc 2000 Mar;66(3):147.
  36. The effect of ceramic restoration shade and thickness on the polymerization of light- and dual-cure resin cements. Oper Dent 2011 Nov-Dec;36(6):661-669.
  37. Effect of light source and time on the polymerization of resin cement through ceramic veneers. J Prosthodont 2001 Sep;10(3):133-139.
  38. Microhardness of a resin cement polymerized by light-emitting diode and halogen lights through ceramic. J Prosthodont 2009 Jul;18(5):411-416.
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