The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Influence of heating rate on the flexural strength of monolithic zirconia

  • Ozturk, Caner (Department of Prosthodontics, Faculty of Dentistry, Hatay Mustafa Kemal University) ;
  • Celik, Ersan (Department of Prosthodontics, Faculty of Dentistry, Ordu University)
  • Received : 2019.03.01
  • Accepted : 2019.08.02
  • Published : 2019.08.30
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Abstract

PURPOSE. Fabrication of zirconia restorations with ideal mechanical properties in a short period is a great challenge for clinicians. The purpose of the study was to investigate the effect of heating rate on the mechanical and microstructural properties of monolithic zirconia. MATERIALS AND METHODS. Forty monolithic zirconia specimens were prepared from presintered monolithic zirconia blanks. All specimens were then assigned to 4 groups according to heating rate as Control, Group $15^{\circ}C$, Group $20^{\circ}C$, and Group $40^{\circ}C$. All groups were sintered according to heating rates with the sintering temperature of $1500^{\circ}C$, a holding time of 90 minutes and natural cooling. The phase composition was examined by XRD analysis, three-point bending test was conducted to examine the flexural strength, and Weibull analysis was conducted to determine weibull modulus and characteristic strength. Average grain sizes were determined by SEM analysis. One-way ANOVA test was performed at a significance level of 0.05. RESULTS. Only tetragonal phase characteristic peaks were determined on the surface of analyzed specimens. Differences among the average grain sizes of the groups were not statistically significant. The results of the three-point bending test revealed no significant differences among the flexural strength of the groups (P>.05). Weibull modulus of groups was ranging from 3.50 to 4.74. The highest and the lowest characteristic strength values were obtained in Group $20^{\circ}C$ and Control Group, respectively. CONCLUSION. Heating rate has no significant effect on the flexural strength of monolithic zirconia. Monolithic zirconia restorations can be produced in shorter sintering periods without affecting the flexural strength by modifying the heating rate.

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References

  1. Kim HK, Kim SH. Effect of the number of coloring liquid applications on the optical properties of monolithic zirconia. Dent Mater 2014;30:e229-37. https://doi.org/10.1016/j.dental.2014.04.008
  2. Choi YS, Kim SH, Lee JB, Han JS, Yeo IS. In vitro evaluation of fracture strength of zirconia restoration veneered with various ceramic materials. J Adv Prosthodont 2012;4:162-9. https://doi.org/10.4047/jap.2012.4.3.162
  3. Triwatana P, Nagaviroj N, Tulapornchai C. Clinical performance and failures of zirconia-based fixed partial dentures: a review literature. J Adv Prosthodont 2012;4:76-83. https://doi.org/10.4047/jap.2012.4.2.76
  4. Stawarczyk B, Ozcan M, Hallmann L, Ender A, Mehl A, Hammerlet CH. The effect of zirconia sintering temperature on flexural strength, grain size, and contrast ratio. Clin Oral Investig 2013;17:269-74. https://doi.org/10.1007/s00784-012-0692-6
  5. Lughi V, Sergo V. Low temperature degradation -aging- of zirconia: A critical review of the relevant aspects in dentistry. Dent Mater 2010;26:807-20. https://doi.org/10.1016/j.dental.2010.04.006
  6. Piconi C, Maccauro G. Zirconia as a ceramic biomaterial. Biomaterials 1999;20:1-25. https://doi.org/10.1016/S0142-9612(98)00010-6
  7. Studart AR, Filser F, Kocher P, Gauckler LJ. Fatigue of zirconia under cyclic loading in water and its implications for the design of dental bridges. Dent Mater 2007;23:106-14. https://doi.org/10.1016/j.dental.2005.12.008
  8. Steffen AA, Dauskardt R, Ritchie R. Cyclic fatigue life and crack-growth behavior of microstructurally small cracks in magnesia-partially stabilized zirconia ceramics. J Am Ceram Soc 1991;74:1259-68. https://doi.org/10.1111/j.1151-2916.1991.tb04095.x
  9. Papia E, Jimbo R, Chrcanovic BR, Andersson M, Vult von Steyern P. Surface structure and mechanical properties of impaction-modified Y-TZP. Dent Mater 2014;30:808-16. https://doi.org/10.1016/j.dental.2014.05.002
  10. Guazzato M, Quach L, Albakry M, Swain MV. Influence of surface and heat treatments on the flexural strength of Y-TZP dental ceramic. J Dent 2005;33:9-18. https://doi.org/10.1016/j.jdent.2004.07.001
  11. Ersoy NM, Aydogdu HM, Degirmenci BU, Cokuk N, Sevimay M. The effects of sintering temperature and duration on the flexural strength and grain size of zirconia. Acta Biomater Odontol Scand. 2015;1:43-50. https://doi.org/10.3109/23337931.2015.1068126
  12. Kosmac T, Oblak C, Jevnikar P, Funduk N, Marion L. The effect of surface grinding and sandblasting on flexural strength and reliability of Y-TZP zirconia ceramic. Dent Mater 1999;15:426-33. https://doi.org/10.1016/S0109-5641(99)00070-6
  13. Swab JJ. Low temperature degradation of Y-TZP materials. J Mater Sci 1991;26: 6706-14. https://doi.org/10.1007/BF02402664
  14. Hjerppe J, Vallittu PK, Froberg K, Lassila LV. Effect of sintering time on biaxial strength of zirconium dioxide. Dent Mater 2009;25:166-71. https://doi.org/10.1016/j.dental.2008.05.011
  15. Hallmann L, Ulmer P, Reusser E, Louvel M, Hammerlea CHF. Effect of dopants and sintering temperature on microstructure and low temperature degradation of dental Y-TZPzirconia. J Eur Ceram Soc 2012;32:4091-104. https://doi.org/10.1016/j.jeurceramsoc.2012.07.032
  16. Guess PC, Att W, Strub JR. Zirconia in fixed implant prosthodontics. Clin Implant Dent Relat Res 2012;14:633-45. https://doi.org/10.1111/j.1708-8208.2010.00317.x
  17. Chevalier J. What future for zirconia as a biomaterial? Biomaterials 2006;27:535-43. https://doi.org/10.1016/j.biomaterials.2005.07.034
  18. Kaizer MR, Gierthmuehlen PC, Dos Santos MB, Cava SS, Zhang Y. Speed sintering translucent zirconia for chairside one-visit dental restorations: Optical, mechanical, and wear characteristics. Ceram Int 2017;43:10999-1005. https://doi.org/10.1016/j.ceramint.2017.05.141
  19. Kim MJ, Ahn JS, Kim JH, Kim HY, Kim WC. Effects of the sintering conditions of dental zirconia ceramics on the grain size and translucency. J Adv Prosthodont 2013;5:161-6. https://doi.org/10.4047/jap.2013.5.2.161
  20. Hjerppe J, Narhi T, Froberg K, Vallittu PK, Lassila LV. Effect of shading the zirconia framework on biaxial strength and surface microhardness. Acta Odontol Scand 2008;66:262-7. https://doi.org/10.1080/00016350802247123
  21. Jiang L, Liao Y, Wan Q, Li W. Effects of sintering temperature and particle size on the translucency of zirconium dioxide dental ceramic. J Mater Sci Mater Med 2011;22:2429-35. https://doi.org/10.1007/s10856-011-4438-9
  22. Ebeid K, Wille S, Hamdy A, Salah T, El-Etreby A, Kern M. Effect of changes in sintering parameters on monolithic translucent zirconia. Dent Mater 2014;30:e419-24. https://doi.org/10.1016/j.dental.2014.09.003
  23. ISO 6872. Dentistry-ceramic materials. International Standards Organization (ISO); Geneva; Switzerland, 2015. Available at: https://www.iso.org/standard/74247.html
  24. Guazzato M, Albakry M, Ringer SP, Swain MV. Strength, fracture toughness and microstructure of a selection of allceramic materials. Part II. Zirconia-based dental ceramics. Dent Mater 2004;20:449-56. https://doi.org/10.1016/j.dental.2003.05.002
  25. Stawarczyk B, Frevert K, Ender A, Roos M, Sener B, Wimmer T. Comparison of four monolithic zirconia materials with conventional ones: Contrast ratio, grain size, four-point flexural strength and two-body wear. J Mech Behav Biomed Mater 2016;59:128-38. https://doi.org/10.1016/j.jmbbm.2015.11.040
  26. Kosmac T, Oblak C, Jevnikar P, Funduk N, Marion L. The effect of surface grinding and sandblasting on flexural strength and reliability of Y-TZP zirconia ceramic. Dent Mater 1999;15:426-33. https://doi.org/10.1016/S0109-5641(99)00070-6
  27. Denry I, Kelly JR. State of the art of zirconia for dental applications. Dent Mater 2008;24:299-307. https://doi.org/10.1016/j.dental.2007.05.007
  28. Gupta TK, Lange FF, Bechtold JH. Effect of stress-induced phase transformation on the properties of polycrystalline zirconia containing metastable tetragonal phase. J Mater Sci 1978;13:1464-70. https://doi.org/10.1007/BF00553200
  29. Kelly JR, Denry I. Stabilized zirconia as a structural ceramic: an overview. Dent Mater 2008;24:289-98. https://doi.org/10.1016/j.dental.2007.05.005
  30. Bravo-Leon A, Morikawa Y, Kawahara M, Mayo MJ. Fracture toughness of nanocrystalline tetragonal zirconia with low yttria content. Acta Mater 2002;50:4555-62. https://doi.org/10.1016/S1359-6454(02)00283-5

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