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VOLUME 18 , ISSUE 12 ( December, 2017 ) > List of Articles

RESEARCH ARTICLE

Relative Translucency of a Multilayered Ultratranslucent Zirconia Material

Loubna Shamseddine, Zeina Majzoub

Citation Information : Shamseddine L, Majzoub Z. Relative Translucency of a Multilayered Ultratranslucent Zirconia Material. J Contemp Dent Pract 2017; 18 (12):1099-1106.

DOI: 10.5005/jp-journals-10024-2183

Published Online: 01-03-2017

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


Abstract

Aim

The aim of this study was to compare the translucency parameter (TP) of ultratranslucent multilayered (UTML) zirconia according to thickness and layer level.

Materials and methods

Rectangles of UTML zirconia with four layers [dentin layer (DEL), first transitional layer (FTL), second transitional layer (STL), and enamel layer (ENL)] and four different thicknesses (0.4, 0.6, 0.8, and 1 mm) were milled from blanks. Digital images were taken in a dark studio against white and black backgrounds under simulated daylight illumination and international commission on illumination (CIE) Lab* color values recorded using Photoshop Creative Cloud software. The TP was computed and compared according to thickness and layer level using analysis of variance (ANOVA) followed by Bonferroni post hoc analysis for multiple comparisons. Significance was set at p < 0.05.

Results

In each thickness, TP values were similar between any two layers. The significant effect of thickness on the TP was observed only in the first two layers. In the DEL, translucency was significantly greater at 0.4 mm than all other thicknesses. In the FTL, differences were significant between 0.4 and 0.8 mm and between 0.4 and 1 mm.

Conclusion

The investigated zirconia does not seem to show gradational changes in relative translucency from dentin to enamel levels regardless of the thickness used. Thickness affected the TP only in the first two layers with better translucency at 0.4 mm.

Clinical significance

Since relative translucency does not seem to be significantly different between layers, clinicians can modify the apicocoronal positioning of the UTML layers within the restoration according to the desired Chroma without any implications on the clinically perceived translucency. While the thickness of 0.4 mm may be suggested for anterior esthetic veneers because of its higher translucency, the other thicknesses of 0.6 to 1 mm can be used to mask colored abutments in full contour restorations.

How to cite this article

Shamseddine L, Majzoub Z. Relative Translucency of a Multilayered Ultratranslucent Zirconia Material. J Contemp Dent Pract 2017;18(12):1099-1106.


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  1. Flexural strength and fracture toughness of dental core ceramics. J Prosthet Dent 2007 Aug;98(2):120-128.
  2. Wear evaluation of the human enamel opposing different Y-TZP dental ceramics and other porcelains. J Dent 2012 Nov;40(11):979-988.
  3. On the surface elemental composition of non-corroded and corroded dental ceramic materials in vitro. J Mater Sci Mater Med 2003 Jun;14(6):557-566.
  4. Effect of coloring with various metal oxides on the microstructure, color, and flexural strength of 3Y-TZP. J Biomed Mater Res B Appl Biomater 2008 Nov;87(2):329-337.
  5. Effect of shading the zirconia framework on biaxial strength and surface microhardness. Acta Odontol Scand 2008 Oct;66(5):262-267.
  6. Translucency of zirconia copings made with different CAD/CAM systems. J Prosthet Dent 2010 Jul;104(1):6-12.
  7. In vitro performance of full-contour zirconia single crowns. Dent Mater 2012 Apr;28(4):449-456.
  8. Full-contour zirconia fixed partial dentures as chairside applications: a case report. Compend Contin Educ Dent 2016 Oct;37(9):648-654.
  9. Optical properties and light irradiance of monolithic zirconia at variable thicknesses. Dent Mater 2015 Oct;31(10):1180-1187.
  10. Comparative analysis of transmittance for different types of commercially available zirconia and lithium disilicate materials. J Adv Prosthodont 2014 Dec;6(6):456-461.
  11. Translucency and masking ability of various opaque-shade composite resins. J Dent 2009 Feb;37(2):102-107.
  12. Contrast ratio and masking ability of three ceramic veneering materials. Oper Dent 2012 Jul-Aug;37(4):406-416.
  13. Translucency of human teeth and dental restorative materials and its clinical relevance. J Biomed Opt 2015 Apr;20(4):045002.
  14. Comparison of an absolute and surrogate measure of relative translucency in dental ceramics. Dent Mater 2013 Jun;29(6):702-707.
  15. Review of translucency determinations and applications to dental materials. J Esthet Restor Dent 2014 Jul-Aug;26(4):217-223.
  16. The effect of a coupling medium on color and translucency of CAD-CAM ceramics. J Dent 2013 Aug;41(Suppl 3):e18-e23.
  17. Ceramic materials for porcelain veneers. Part I: correlation between translucency parameters and contrast ratio. J Prosthet Dent 2013 Nov;110(5):397-401.
  18. Reliability and accuracy of four dental shade-matching devices. J Prosthet Dent 2009 Mar;101(3):193-199.
  19. In vitro computer analysis of crown discolouration from commonly used endodontic sealers. Aust Endod J 2006 Dec;32(3):116-119.
  20. Could digital imaging be an alternative for digital colorimeters? Clin Oral Investig 2010 Dec;14(6):713-718.
  21. Assessment of color parameters of composite resin shade guides using digital imaging versus colorimeter. J Esthet Restor Dent 2010 Dec;22:379-388.
  22. Threshold value for the perception of color changes of human gingiva. Int J Periodontics Restorative Dent 2014 Nov-Dec;34(6):757-762.
  23. Threshold values for the perception of color changes in human teeth. Int J Periodontics Restorative Dent 2016 Nov-Dec;36(6):777-783.
  24. Dental shade matching using a digital camera. J Dent 2012 Dec;40(2):3-10.
  25. Photometric assessment of tooth color using commonly available software. Eur J Esthet Dent 2010 Summer;5(2):204-215.
  26. Shade matching assisted by digital photo-graphy and computer software. J Prosthodont 2009 Apr;18(3):235-241.
  27. The use of digital imaging for colour matching and communication in restorative dentistry. Br Dent J 2005 Jul;199(1):43-49.
  28. Digital photography enhances diagnostics, communication, and documentation. Compend Contin Educ Dent 2011 Nov-Dec;32(4):36-38.
  29. Gingival inflammation assessment: image analysis. J Indian Soc Periodontol 2012 Apr;16(2):231-234.
  30. Gingival inflammation assessment by image analysis: measurement and validation. Int J Dent Hyg 2008 May;6(2):137-142.
  31. Photometric CIELAB analysis of the gingiva: a novel approach to assess response to periodontal therapy. J Periodontol 2017 Sep;88(9):854-859.
  32. Clinical application of a digital method to improve the accuracy of color perception in toluidine blue stained oral mucosal lesions. Quintessence Int 2013 Mar;44(8):619-627.
  33. The measurement of tooth whiteness by image analysis and spectrophotometry: a comparison. J Oral Rehabil 2005 Jan;32(1):7-15.
  34. Measurement of stain on extracted teeth using spectrophotometry and digital image analysis. Int J Dent Hyg 2007 Aug;5(3):174-179.
  35. Subjective and photometric determination of bleaching outcomes. Quintessence Int 2007 Jan;38(1):e41-e47.
  36. In vitro evaluation of two whitening regimens using color-analyzing methods. Quintessence Int 2010 Feb;41(2):145-156.
  37. Spectrophotometric and computerized evaluation of tooth bleaching employing 10 different home-bleaching procedures: in-vitro study. Eur J Dent 2014 Oct;8(4):538-545.
  38. Agreement between digital image analysis and clinical spectrophotometer in CIEL*C*h° coordinate differences and total color difference (ΔE) measurements of dental ceramic shade tabs. Int J Esthet Dent 2016 Summer;11(2):234-245.
  39. Contrast ratio of six zirconia-based dental ceramics. J Prosthodont 2014 Aug;23(6):456-461.
  40. Effect of the amount of thickness reduction on color and translucency of dental monolithic zirconia ceramics. J Adv Prosthodont 2016 Feb;8(1):37-42.
  41. Spectroradiometric and spectrophotometric translucency of ceramic materials. J Prosthet Dent 2010 Oct;104(4):239-246.
  42. Optical properties of pre-colored dental monolithic zirconia ceramics. J Dent 2016 Dec;55:75-81.
  43. Translucency of dental ceramics with different thicknesses. J Prosthet Dent 2013 Jul;110(1):14-20.
  44. A comparative evaluation of the translucency of zirconias and lithium disilicate for monolithic restorations. J Prosthet Dent 2016 Aug;116(2):257-263.
  45. Light transmittance by a multi-coloured zirconia material. Dent Mater J 2015 Apr;34(3):310-314.
  46. Measurement of translucency of tooth enamel and dentin. Acta Odontol Scand 2009 Sep;67(1):57-64.
  47. Criteria for clinical translucency evaluation of direct esthetic restorative materials. Restor Dent Endod 2016 Aug;41(3):159-166.
  48. Comparison of the translucency of shaded zirconia all-ceramic systems. J Adv Prosthodont 2014 Oct;6(5):415-422.
  49. Light transmittance of zirconia as a function of thickness and microhardness of resin cements under different thicknesses of zirconia. Med Oral Patol Oral Cir Bucal 2013 Mar;18(2):e212-e218.
  50. Translucency of monolithic and core zirconia after hydrothermal aging. Acta Biomater Odontol Scand 2015 Dec;1(2-4):86-92.
  51. Dental color matching: a comparison between visual and instrumental methods. Dent Mater J 2016 Jan;35(1):63-69.
  52. Color error in the digital camera image capture process. J Digit Imaging 2014 Apr;27(2):182-191.
  53. Shade correspondence, color, and translucency differences between human dentine and a CAD/CAM hybrid ceramic system. J Esthet Restor Dent 2016 Mar;28(Suppl 1):S46-S55.
  54. Comparison of two color-difference formulas using the Bland-Altman approach based on natural tooth color space. J Prosthet Dent 2016 Apr;115(4):482-488.
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