J Adv Prosthodont.  2012 May;4(2):93-96.

Comparison of light transmittance in different thicknesses of zirconia under various light curing units

  • 1Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey. isilcekic@gazi.edu.tr


The objective of this study was to compare the light transmittance of zirconia in different thicknesses using various light curing units.
A total of 21 disc-shaped zirconia specimens (5 mm in diameter) in different thicknesses (0.3, 0.5 and 0.8 mm) were prepared. The light transmittance of the specimens under three different light-curing units (quartz tungsten halogen, light-emitting diodes and plasma arc) was compared by using a hand-held radiometer. Statistical significance was determined using two-way ANOVA (alpha=.05).
ANOVA revealed that thickness of zirconia and light curing unit had significant effects on light transmittance (P<.001).
Greater thickness of zirconia results in lower light transmittance. Light-emitting diodes light-curing units might be considered as effective as Plasma arc light-curing units or more effective than Quartz-tungsten-halogen light-curing units for polymerization of the resin-based materials.


Zirconia; Light curing unit; Light transmittance

MeSH Terms



  • Fig. 1 Mean light transmittance (%) of the zirconia specimens in different thicknesses with different light curing units.


1. Turp V, Sen D, Poyrazoglu E, Tuncelli B, Goller G. Influence of zirconia base and shade difference on polymerization efficiency of dual-cure resin cement. J Prosthodont. 2011. 20:361–365.
2. Shiraishi T, Wood DJ, Shinozaki N, van Noort R. Optical properties of base dentin ceramics for all-ceramic restorations. Dent Mater. 2011. 27:165–172.
3. Rasetto FH, Driscoll CF, Prestipino V, Masri R, von Fraunhofer JA. Light transmission through all-ceramic dental materials: a pilot study. J Prosthet Dent. 2004. 91:441–446.
4. Touati B, Miara P. Light transmission in bonded ceramic restorations. J Esthet Dent. 1993. 5:11–18.
5. Heffernan MJ, Aquilino SA, Diaz-Arnold AM, Haselton DR, Stanford CM, Vargas MA. Relative translucency of six all-ceramic systems. Part I: core materials. J Prosthet Dent. 2002. 88:4–9.
6. Baldissara P, Llukacej A, Ciocca L, Valandro FL, Scotti R. Translucency of zirconia copings made with different CAD/CAM systems. J Prosthet Dent. 2010. 104:6–12.
7. Jung H, Friedl KH, Hiller KA, Furch H, Bernhart S, Schmalz G. Polymerization efficiency of different photocuring units through ceramic discs. Oper Dent. 2006. 31:68–77.
8. Ceballos L, Fuentes MV, Tafalla H, Martínez A, Flores J, Rodríguez J. Curing effectiveness of resin composites at different exposure times using LED and halogen units. Med Oral Patol Oral Cir Bucal. 2009. 14:E51–E56.
9. Jung H, Friedl KH, Hiller KA, Furch H, Bernhart S, Schmalz G. Polymerization efficiency of different photocuring units through ceramic discs. Oper Dent. 2006. 31:68–77.
10. Koran P, Kürschner R. Effect of sequential versus continuous irradiation of a light-cured resin composite on shrinkage, viscosity, adhesion, and degree of polymerization. Am J Dent. 1998. 11:17–22.
11. Jung H, Friedl KH, Hiller KA, Haller A, Schmalz G. Curing efficiency of different polymerization methods through ceramic restorations. Clin Oral Investig. 2001. 5:156–161.
12. Mobarak E, Elsayad I, Ibrahim M, El-Badrawy W. Effect of LED light-curing on the relative hardness of tooth-colored restorative materials. Oper Dent. 2009. 34:65–71.
13. Cekic I, Ergun G, Lassila LV, Vallittu PK. Ceramic-dentin bonding: effect of adhesive systems and light-curing units. J Adhes Dent. 2007. 9:17–23.
14. Price RB, Felix CA, Andreou P. Effects of resin composite composition and irradiation distance on the performance of curing lights. Biomaterials. 2004. 25:4465–4477.
15. O'Keefe KL, Pease PL, Herrin HK. Variables affecting the spectral transmittance of light through porcelain veneer samples. J Prosthet Dent. 1991. 66:434–438.
16. de Oyagüe RC, Monticelli F, Toledano M, Osorio E, Ferrari M, Osorio R. Influence of surface treatments and resin cement selection on bonding to densely-sintered zirconium-oxide ceramic. Dent Mater. 2009. 25:172–179.
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