POLYMERIZATION EFFICIENCY OF TWO DUAL-CURE CEMENTS THROUGH DENTAL CERAMICS

Abstract

Purpose: The aim of this study was to evaluate the effect of thickness of zirconia on curing efficiency of resin cements.

Materials and Methods: 4 discs with 4.0 mm in diameter were prepared from non-HIP translucent zirconia blocks using a CAD/CAM system and feldspathic ceramic was layered onto discs. Thus, 4 ceramic disc samples were fabricated: (G) 0.5 mm zirconia- as a control group, (G1) 0.5 mm zirconia and 0.5 mm feldspathic, (G2) 1.0 mm zirconia and 0.5 mm feldspathic and (G3) 2.0 mm zirconia and 0.5 mm feldspathic ceramic layer. 2 different dual cure cements were polymerized using a LED curing unit. Degree of conversion was evaluated using Vickers Hardness Test and depths of cure of samples were measured. Data were analyzed statistically using One-way ANOVA and Tukey’s HSD test (p<0.05).

Results: Microhardness and depth of cure values were different under same thickness of ceramic discs for two resin cements. As the thickness of the zirconia discs increased, the microhardness values and depth of cure decreased.

Conclusion: Photocuring time cannot be the same for all clinical conditions, under thicker zirconia restorations (>2.0 mm), an extended period of light curing or a light unit with a high irradiance should be used.

Keywords

• Ceramic thickness; polymerization; resin cement; zirconia

İki Dual-Cure Reçine Simanın Zirkonya Seramikleri Altında Polimerizasyon Etkinliğinin İncelenmesi

Abstract

Amaç: Bu çalışmanın amacı zirkonya kalınlığının reçine simanın polimerizasyonu üzerine etkisinin değerlendirilmesidir. Gereç ve Yöntem: 4.0 mm çapında 4 adet disk non-HIP zirkonya bloklardan CAD/CAM sistemi kullanılarak hazırlandı ve feldspatik seramik diskler üzerine tabakalama tekniği ile uygulandı. Bu şekilde 4 adet seramik disk deney örneği elde edildi: (G) 0.5 mm zirkonya kontrol grubu, (G1) 0,5 mm zirkonya ve 0,5 mm feldspatik, (G2) 1.0 mm zirkonya ve 0.5 mm feldspatik ve (G3) 2.0 mm zirkonya ve 0.5 mm feldspatik seramik katmanı. LED ışık cihazı kullanılarak 2 farklı dual cure reçine siman polimerize edildi. Dönüşüm derecesi Vickers sertlik değeri kullanılarak değerlendirildi ve örneklerin polimerizasyon derinliği ölçüldü. Verilerin istatistiksel değerlendirilmesi tek yönlü varyans analizi (ANOVA) ve Tukey’s HSD testleri ile yapıldı (p < 0.05). Bulgular: Mikrosertlik ve polimerizasyon derinliği, aynı kalınlıktaki seramik örnekler altında iki farklı reçine siman için anlamlı farklılık göstermiştir. Zirkonya kalınlığı arttıkça, mikrosertlik değerleri ve polimerizasyon derinliği azalmıştır. Sonuç: Işıkla polimerizasyon süresi farklı klinik durumlar için aynı olamaz. Kalın zirkonya restorasyonlar altında ( > 2.0 mm) ışıkla polimerizasyonun süresini uzatmak veya yüksek enerjiye sahip bir ışık ünitesi kullanmak uygun olabilir.

Keywords

• seramik kalınlığı, polimerizasyon, reçine siman, zirkonya

References

1. Brodbelt RH, O’Brien WJ, Fan PL. Translucency of dental porcelains. J Dent Res 1980;59(1):70–75.
2. 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(1):4–9.
3. Denry I, Holloway JA. Ceramics for Dental Applications: a review. Materials 2010;3(1):351-368.
4. Phark JH, Duarte S Jr, Blatz M, Sadan A. An in vitro evaluation of the long-term resin bond to a new densely sintered high-purity zirconium-oxide ceramic surface. J Prosthet Dent 2009;101(1):29-38.
5. Palacios RP, Johnson GH, Phillips KM, Raigrodski AJ. Retention of zirconium oxide ceramic crowns with three types of cement. J Prosthet Dent 2006;96(2):104-114.
6. Guazzato M, Albakry M, Ringer SP, Swain MV. Strength, fracture toughness and microstructure of a selection of all-ceramic materials. Part II. Zirconia-based dental ceramics. Dent Mater 2004;20(5):449-456.
7. Denry I, Kelly JR. State of the art of zirconia for dental applications. Dent Mater 2008;24(3):299-307.
8. Al-Amleh B, Lyons K, Swain MV. Clinical trials in zirconia: a

9. systematic review. J Oral Rehabil 2010;37(8):641-652.
10. Ban S. Reliability and properties of core materials for all-ceramic dental restorations. Jpn Dent Sci Rev 2008;44(1):3–21.
11. Heffernan MJ, Aquilino SA, Diaz-Arnold AM, Haselton DR, Stanford CM, Vargas MA. Relative translucency of six all-ceramic systems. Part II: core and veneer materials. J Prosthet Dent 2002;88(1):10-15.
12. Rasetto FH, Driscoll CF, von Fraunhofer JA. Effect of light source and time on the polymerization of resin cement through ceramic veneers. J Prosthodont 2001;10(3):133-139.
13. Wee AG, Monaghan P, Johnston WM. Variation in color between intended matched shade and fabricated shade of dental porcelain. J Prosthet Dent 2002;87(6):657-666.
14. Kramer N, Lohbauer U, Frankenberger R. Adhesive luting of indirect restorations. Am J Dent 2000;13(Spec No):60D–76D.
15. Rosenstiel SF, Land MF, Crispin BJ. Dental luting agents: a review of the current literature. J Prosthet Dent 1998;80(3):280-301.
16. Uo M, Sjogren G, Sundh A, Watari F, Bergman M, Lerner U. Cytotoxicity and bonding property of dental ceramics. Dent Mater 2003;19(6):487–492.
17. Thompson JY, Stoner BR, Piascik JR, Smith R. Adhesion/cementation to zirconia and other non-silicate ceramics: where are we now? Dent Mater 2011;27(1):71–82.
18. Platt JA. Resin cements: into the 21st century. Compend Contin Educ Dent 1999;20(12): 1173-1176.
19. Tarle Z, Knezevic A, Demoli N, Meniga A, Sutaloa J, Unterbrink G, Ristic M, Pichler G. Comparison of composite curing parameters: effects of light source and curing mode on conversion, temperature rise and polymerization shrinkage. Oper Dent 2006;31(2):219-226.
20. Tango RN, Sinhoreti MA, Correr AB, Correr-Sobrinho L, Consani RL. Effect of veneering materials and curing methods on resin cement knoop hardness. Braz Dent J 2007;18(3):235-239.
21. International Organization for Standardization, ISO 4049/2000 – Dentistry Polymer based filling restorative and luting materials. Switzerland: ISO; 2000.
22. Koch A, Kroeger M, Hartung M, Manetsberger I, Hiller KA, Schmalz G, Friedl KH. Influence of ceramic translucency on curing efficacy of different light-curing units. J Adhes Dent 2007;9(5):449-462.
23. Valentino TA, Borges GA, Borges LH, Vishal J, Martins LR, Correr-Sobrinho L. Dual resin cement knoop hardness after different activation modes through dental ceramics. Braz Dent J 2010;21(2):104-110.
24. Ferracane JL, Greener EH. The effect of resin formulation on the degree of conversion and mechanical properties of dental restorative resins. J Biomed Mater Res 1986;20(1):121–131.
25. Silikas N, Eliades G, Watts DC. Light intensity effects on resin-composite degree of conversion and shrinkage strain. Dent Mater 2000;16(4):292–296.
26. Rueggeberg FA, Caughman WF, Curtis JW Jr, Davis HC. A predictive model for the polymerization of photo-activated resin composites. Int J Prosthodont 1994;7(2):159–166.
27. Halvorson RH, Erickson RL, Davidson CL. Energy dependent polymerization of resin-based composite. Dent Mater 2002;18(6):463–469.
28. Myers ML, Caughman WF, Rueggeberg FA. Effect of restoration composition, shade, and thickness on the cure of a photo activated resin cement. J Prosthodont 1994;3(3):149–157.
29. Barghi N, McAlister EH. LED and halogen lights: effect of ceramic thickness and shade on curing luting resin. Compend Contin Educ Dent 2003;24(7):497–500.
30. Lee JW, Cha HS, Lee JH. Curing efficiency of various resin-based materials polymerized through different ceramic thicknesses and curing time. J Adv Prosthodont 2011;3(3):126–131.
31. Kilinc E, Antonson SA, Hardigan PC, Kesercioglu A. The effect of ceramic restoration shade and thickness on the polymerization of light and dual-cure resin cements Oper Dent 2011;36(6):661–669.
32. Foxton RM, Pereira PN, Nakajima M, Tagami J, Miura H. Effect of light source direction and restoration thickness on tensile strength of a dual-curable resin cement to copy-milled ceramic Am J Dent 2003;16(2):129–134.
33. 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(1):68–77.
34. Meng X, Yoshida K, Atsuta M. Hardness development of dual-cured resin cements through different thicknesses of ceramics. Dent Mater J 2006;25(1):132–137.
35. el-Mowafy OM, Rubo MH, el-Badrawy WA. Hardening of new resin cements cured through a ceramic inlay. Oper Dent 1999;24(1):38–44.
36. el-Badrawy WA, el-Mowafy OM. Chemical versus dual curing of resin inlay cements. J Prosthet Dent 1995;73(6):515–524.
37. 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(5):361-365.
38. Uctasli S, Hasanreisoglu U, Wilson HJ. The attenuation of radiation by porcelain and its effect on polymerization of resin cements. J Oral Rehabil 1994;21(5):565–575.
39. Jung H, Friedl KH, Hiller KA, Haller A, Schmalz G. Curing efficiency of different polymerization methods through ceramic restorations. Clin Oral Investig 2001;5(3):156–161.
40. Manso AP, Silva NR, Bonfante EA, Pegoraro TA, Dias RA, Carvalho RM. Cements and adhesives for all-ceramic restorations. Dent Clin North Am 2011;55(2):311-332.
41. Antonson SA, Anusavice KJ. Contrast ratio of veneering and core ceramics as a function of thickness. Int J Prosthodont 2001;14(4):316-320.
42. 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(1):6-12.
43. Strang R, McCrosson J, Muirhead GM, Richardson SA. The setting of visible-light-cured resins beneath etched porcelain veneers. Br Dent J 1987;163(5):149–151.
44. Galmarini S, Aschauer U, Bowen P, Parker SC. Atomistic simulation of Y-doped-alumina interfaces. J Am Ceram Soc 2008;91(11):3643-3651.
45. Cottom BA, Mayo MJ. Fracture toughness of nanocrystalline ZrO2-3mol% Y2O3 determined by Vickers indentation. Scr Mater 1996;34(5):809-814.
46. Casolco SR Jr, Xu J, Garay JE. Transparent/translucent polycrystalline nanostructured yttria stabilized zirconia with varying colors. Scr Mater 2008;58(6):516-519.
47. Uhl A, Sigusch BW, Jandt KD. Second generation LEDs for the polymerization of oral biomaterials. Dent Mater 2004;20(1):80–87.
48. Tsai PC, Meyers IA, Walsh LJ. Depth of cure and surface microhardness of composite resin cured with blue LED curing lights. Dent Mater 2004;20(4):364–369.
49. Aguiar FH, Lazzari CR, Lima DA, Ambrosano GM, Lovadino JR. Effect of light curing tip distance and resin shade on microhardness of a hybrid resin composite. Braz Oral Res 2005;19(4):302–306.
50. Passos SP, Kimpara ET, Bottino MA, Santos GC Jr, Rizkalla AS. Effect of ceramic shade on the degree of conversion of a dual-cure resin cement analyzed by FTIR. Dent Mater 2013;29(3):317-323.
51. Leinfelder KF, Isenberg BP, Essig ME. A new method for generating ceramic restorations: a CAD-CAM system. J Am Dent Assoc 1989;118(6):703-707.
52. Kohorst P, Brinkmann H, Dittmer MP, Borchers L, Stiesch M. Influence of the veneering process on the marginal fit of zirconia fixed dental prostheses. J Oral Rehabil 2010;37(4):283-291.