Journal of dental hygiene science (치위생과학회지)

The Korean Society of Dental Hygiene Science (한국치위생과학회)
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Mechanical Properties and Microstructure of the Leucite-Reinforced Glass-Ceramics for Dental CAD/CAM

  • Received : 2017.12.22
  • Accepted : 2018.01.17
  • Published : 2018.02.28
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Abstract

The computer-aided design/computer-aided manufacturing (CAD/CAM) system was introduced to shorten the production time of all-ceramic restorations and the number of patient visits. Among these types of ceramic for dental CAD/CAM, they have been processed into inlay, onlay, and crown shapes using leucite-reinforced glass-ceramics to improve strength. The purpose of this study was to observe the mechanical properties and microstructure of leucite-reinforced glass-ceramics for dental CAD/CAM. Two types of leucite-reinforced glass-ceramic blocks (IPS Empress CAD, Rosetta BM) were prepared with diameter of 13 mm and thickness of 1 mm. Biaxial flexural testing was conducted using a piston-on-three-ball method at a crosshead speed of 0.5 mm/min. Weibull statistics were used for the analysis of biaxial flexural strength. Fracture toughness was obtained using an indentation fracture method. Specimens were observed by field emission scanning electron microscopy to examine the microstructure of the leucite crystalline phase after acid etching with 0.5% hydrofluoric acid aqueous solution for 1 minute. The results of strength testing showed that IPS Empress CAD had a mean value of $158.1{\pm}8.6MPa$ and Rosetta BM of $172.3{\pm}8.3MPa$. The fracture toughness results showed that IPS Empress CAD had a mean value of $1.28{\pm}0.19MPa{\cdot}m^{1/2}$ and Rosetta BM of $1.38{\pm}0.12MPa{\cdot}m^{1/2}$. The Rosetta BM sample exhibited higher strength and fracture toughness. Moreover, the crystalline phase size and ratio were increased in the Rosetta BM sample. The above results are expected to elucidate the basic mechanical properties and crystal structure characteristics of IPS Empress CAD and Rosetta BM. Additionally, they will help develop leucite-reinforced glass-ceramic materials for CAD/CAM.

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References

  1. Yoshimura HN, Gonzaga CC, Cesar PF, Miranda WG Jr: Relationship between elastic and mechanical properties of dental ceramics and their index of brittleness. Ceram Int 38: 4715-4722, 2012. https://doi.org/10.1016/j.ceramint.2012.02.056
  2. Ritzberger C, Apel E, Holand W, Peschke A, Rheinberger VM: Properties and clinical application of three types of dental glass-ceramics and ceramics for CAD-CAM technologies. Materials (Basel) 3: 3700-3713, 2010. https://doi.org/10.3390/ma3063700
  3. Kim KB, Kim JH: Influence of low temperature degradation on bond strength of yttria-stabilized tetragonal zirconia polycrystal core to veneering ceramic. J Dent Hyg Sci 14: 29-34, 2014.
  4. MacCulloch WT: Advances in dental ceramics. Br Dent J 124: 361-365, 1968.
  5. McLean JW: Evolution of dental ceramics in the twentieth century. J Prosthet Dent 85: 61-66, 2001. https://doi.org/10.1067/mpr.2001.112545
  6. Sakaguchi RL, Powers JM: Craig's restorative dental materials. 13th ed. Elsevier Mosby, Philadelphia, pp.455-462, 2012.
  7. Holand W, Beall GH: Glass-ceramic technology. 2nd ed. Wiley, Hoboken, 2012.
  8. Krämer N, Frankenberger R: Clinical performance of bonded leucite-reinforced glass ceramic inlays and onlays after eight years. Dent Mater 21: 262-271, 2005. https://doi.org/10.1016/j.dental.2004.03.009
  9. Miyazaki T, Hotta Y, Kunii J, Kuriyama S, Tamaki Y: A review of dental CAD/CAM: current status and future perspectives from 20 years of experience. Dent Mater J 28: 44-56, 2009. https://doi.org/10.4012/dmj.28.44
  10. Trost L, Stines S, Burt L: Making informed decisions about incorporating a CAD/CAM system into dental practice. J Am Dent Assoc 137 Suppl: 32S-36S, 2006. https://doi.org/10.14219/jada.archive.2006.0399
  11. Chen X, Chadwick TC, Wilson RM, Hill RG, Cattell MJ: Crystallization and flexural strength optimization of fine-grained leucite glass-ceramics for dentistry. Dent Mater 27: 1153-1161, 2011. https://doi.org/10.1016/j.dental.2011.08.009
  12. Quinn GD, Giuseppetti AA, Hoffman KH: Chipping fracture resistance of dental CAD/CAM restorative materials: part I--procedures and results. Dent Mater 30: e99-e111, 2014. https://doi.org/10.1016/j.dental.2014.02.010
  13. Chen YM, Smales RJ, Yip KH, Sung WJ: Translucency and biaxial flexural strength of four ceramic core materials. Dent Mater 24: 1506-1511, 2008. https://doi.org/10.1016/j.dental.2008.03.010
  14. Anstis GR, Chantikul P, Lawn BR, Marshall DB: A critical evaluation of indentation techniques for measuring fracture toughness: I, Direct crack measurements. J Am Ceram Soc 64: 533-538, 1981. https://doi.org/10.1111/j.1151-2916.1981.tb10320.x
  15. Im YW, Jun SK, Kim SC, et al.: Standardized test methods for mechanical properties of dental prosthetic/restorative materials and their applications. Korean J Dent Mater 42: 259-270, 2015. https://doi.org/10.14815/kjdm.2015.42.3.259
  16. Alkadi L, Ruse ND: Fracture toughness of two lithium disilicate dental glass ceramics. J Prosthet Dent 116: 591-596, 2016. https://doi.org/10.1016/j.prosdent.2016.02.009
  17. Sin CH, Hwang SS, Han GS: Shear bond strength of veneering ceramic and zirconia core according to the surface treatments. J Dent Hyg Sci 13: 487-492, 2013.
  18. Kim KB, Kim JH: A study on the shear bond strength of veneering ceramics to the lithium disilicate (IPS e.max CAD) core. J Dent Hyg Sci 13: 290-295, 2013.
  19. Chen C, Trindade FZ, de Jaqer N, Kleverlaan CJ, Feilzer AJ: The fracture resistance of a CAD/CAM Resin Nano Ceramic (RNC) and a CAD ceramic at different thicknesses. Dent Mater 30: 954-962, 2014. https://doi.org/10.1016/j.dental.2014.05.018
  20. Song XF, Yin L: Surface morphology and fracture in handpiece adjusting of a leucite-reinforced glass ceramic with coarse diamond burs. Mater Sci Eng: A 534: 193-202, 2012. https://doi.org/10.1016/j.msea.2011.11.058
  21. Teixeira EC, Piascik JR, Stoner BR, Thompson JY: Dynamic fatigue and strength characterization of three ceramic materials. J Mater Sci Mater Med 18: 1219-1224, 2007. https://doi.org/10.1007/s10856-007-0131-4
  22. Zeng K, Oden A, Rowcliffe D: Flexure tests on dental ceramics. Int J Prosthodont 9: 434-439, 1996.
  23. Ban S, Anusavice KJ: Influence of test method on failure stress of brittle dental materials. J Dent Res 69: 1791-1799, 1990. https://doi.org/10.1177/00220345900690120201
  24. Passos SP, Nychka JA, Major P, Linke B, Flores-Mir C: In vitro fracture toughness of commercial Y-TZP ceramics: a systematic review. J Prosthodont 24: 1-11, 2015. https://doi.org/10.1111/jopr.12179
  25. Lin WS, Ercoli C, Feng C, Morton D: The effect of core material, veneering porcelain, and fabrication technique on the biaxial flexural strength and weibull analysis of selected dental ceramics. J Prosthodont 21: 353-362, 2012. https://doi.org/10.1111/j.1532-849X.2012.00845.x
  26. Bona AD, Anusavice KJ, DeHoff PH: Weibull analysis and flexural strength of hot-pressed core and veneered ceramic structures. Dent Mater 19: 662-669, 2003. https://doi.org/10.1016/S0109-5641(03)00010-1
  27. McCabe JF, Carrick TE: A statistical approach to the mechanical testing of dental materials. Dent Mater 2: 139-142, 1986. https://doi.org/10.1016/S0109-5641(86)80021-5
  28. Della Bona A, Mecholsky JJ Jr, Anusavice KJ: Fracture behavior of lithia disilicate-and leucite-based ceramics. Dent Mater 20: 956-962, 2004. https://doi.org/10.1016/j.dental.2004.02.004
  29. Harrer W, Danzer R, Morrell R: Influence of surface defects on the biaxial strength of a silicon nitride ceramic: increase of strength by crack healing. J Eur Ceram Soc 32: 27-35, 2012. https://doi.org/10.1016/j.jeurceramsoc.2011.07.019

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