The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Color stability of fully- and pre-crystalized chair-side CAD-CAM lithium disilicate restorations after required and additional sintering processes

  • Jurado, Carlos Alberto (Texas Tech University Health Sciences Center El Paso Woody L. Hunt School of Dental Medicine) ;
  • El-Gendy, Tamer (A. T. Still University Arizona School of Dentistry and Oral Health) ;
  • Hyer, Jared (A. T. Still University Arizona School of Dentistry and Oral Health) ;
  • Tsujimoto, Akimasa (Department of Operative Dentistry, University of Iowa College of Dentistry)
  • Received : 2021.11.19
  • Accepted : 2022.01.25
  • Published : 2022.02.28
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Abstract

PURPOSE. The aim of this study was to investigate shade changes in fully- and pre-crystalized CAD-CAM lithium disilicate crowns after the required and additional firing processes. MATERIALS AND METHODS. One hundred and five crowns of shade A1 with high translucency were milled out of CAD-CAM lithium disilicate blocks and categorized as follows (n = 15): (1) restorations fabricated from Straumann n!ce with no additional sintering process; (2) restorations fabricated from Straumann n!ce with one additional sintering process; (3) restorations fabricated from Straumann n!ce with two additional sintering processes; (4) restorations fabricated from Amber Mill with one sintering process; (5) restorations fabricated from Amber Mill with two sintering processes; (6) restorations fabricated from IPS e.max CAD with one sintering process; (7) restorations fabricated from IPS e.max CAD with two sintering processes. All restorations were evaluated with a color imaging spectrophotometer. RESULTS. All restorations presented some color alteration from the original shade both after a single and after two firing processes. CONCLUSION. The required and additional sintering processes for restorations fabricated with chairside CAD-CAM lithium disilicate blocks cause an alteration of the original shade selected. Shade A1 high translucency restorations tend to change to a more yellowish B1 shade after a sintering process.

Keywords

Acknowledgement

Authors would like to thank Darcy Lanz DT for her laboratory support, Dr. Curt Bay for the statistical analysis support and Dr. Ann Spolarich for her guidance.

References

  1. Tsujimoto A, Barkmeier WW, Takamizawa T, Latta MA, Miyazaki M. Influence of thermal cycling on flexural properties and simulated wear of computer-aided design/computer-aided manufacturing resin composites. Oper Dent 2017;42:101-10. https://doi.org/10.2341/16-046-L
  2. Jurado CA, Tsujimoto A, Watanabe H, Villalobos-Tinoco J, Garaicoa JL, Markham MD, Barkmeier WW, Latta MA. Chair-side CAD/CAM fabrication of a single-retainer resin bonded fixed dental prosthesis: a case report. Restor Dent Endod 2020;45:e15. https://doi.org/10.5395/rde.2020.45.e15
  3. Christensen GJ. Is the rush to all-ceramic crowns justified? J Am Dent Assoc 2014;145:192-4. https://doi.org/10.14219/jada.2013.19
  4. Makhija SK, Lawson NC, Gilbert GH, Litaker MS, McClelland JA, Louis DR, Gordan VV, Pihlstrom DJ, Meyerowitz C, Mungia R, McCracken MS; National Dental PBRN Collaborative Group. Dentist material selection for single-unit crowns: findings from the National Dental Practice-Based Research Network. J Dent 2016;55:40-7. https://doi.org/10.1016/j.jdent.2016.09.010
  5. Albakry M, Guazzato M, Swain MV. Influence of hot pressing on the microstructure and fracture toughness of two pressable dental glass-ceramics. J Biomed Mater Res B Appl Biomater 2004;71:99-107. https://doi.org/10.1002/jbm.b.30066
  6. Yin R, Jang YS, Lee MH, Bae TS. Comparative evaluation of mechanical properties and wear ability of five CAD/CAM dental blocks. Materials (Basel) 2019;12:2252. https://doi.org/10.3390/ma12142252
  7. Stawarczyk B, Mandl A, Liebermann A. Modern CAD/CAM silicate ceramics, their translucency level and impact of hydrothermal aging on translucency, Martens hardness, biaxial flexural strength and their reliability. J Mech Behav Biomed Mater 2021;118:104456. https://doi.org/10.1016/j.jmbbm.2021.104456
  8. Preis V, Hahnel S, Behr M, Rosentritt M. In vitro performance and fracture resistance of novel CAD/CAM ceramic molar crowns loaded on implants and human teeth. J Adv Prosthodont 2018;10:300-7. https://doi.org/10.4047/jap.2018.10.4.300
  9. Kanat-Erturk B. Color stability of CAD/CAM ceramics prepared with different surface finishing procedures. J Prosthodont 2020;29:166-72. https://doi.org/10.1111/jopr.13019
  10. Kurt M, Bankog lu Gungor M, Karakoca Nemli S, Turhan Bal B. Effects of glazing methods on the optical and surface properties of silicate ceramics. J Prosthodont Res 2020;64:202-9. https://doi.org/10.1016/j.jpor.2019.07.005
  11. Wee AG. Description of color, color replication process and esthetics. Contemporary Fixed Prosthodontics. 4th ed., St. Louis, MO; Mosby: 2006. p. 709-32.
  12. Cal E, Sonugelen M, Guneri P, Kesercioglu A, Kose T. Application of a digital technique in evaluating the reliability of shade guides. J Oral Rehabil 2004;31:483-91. https://doi.org/10.1111/j.1365-2842.2004.01197.x
  13. Berns RS, Billmeyer FW, Saltzman M. Billmeyer and Saltzman's principles of color technology. 4th ed., Hoboken, NJ; John Wiley & Sons: 2019. p. 13-20.
  14. Paul SJ, Peter A, Rodoni L, Pietrobon N. Conventional visual vs spectrophotometric shade taking for porcelain-fused-to-metal crowns: a clinical comparison. Int J Periodontics Restorative Dent 2004;24:222-31.
  15. Acar O, Yilmaz B, Altintas SH, Chandrasekaran I, Johnston WM. Color stainability of CAD/CAM and nanocomposite resin materials. J Prosthet Dent 2016;115:71-5. https://doi.org/10.1016/j.prosdent.2015.06.014
  16. Cui H, Jia Y, Shaofeng M, Biyun G. Effect of repeated sintering and variations in thickness on the color and microstructure of dental lithium disilicate-based glass ceramic veneers. West China J Stomatol 2017;35:389-93.
  17. Turgut S, Bagis B. Effect of resin cement and ceramic thickness on final color of laminate veneers: an in vitro study. J Prosthet Dent 2013;109:179-86. https://doi.org/10.1016/S0022-3913(13)60039-6
  18. Kim SJ, Woo JM, Jo CW, Park JH, Kim SK, Kahm SH. Color changes of ceramic veneers following glazing with respect to their composition. J Adv Prosthodont 2019;11:16-22. https://doi.org/10.4047/jap.2019.11.1.16
  19. Li Q. Effects of Luting Composites on the Resultant Colors of Ceramic Veneers to Intended Shade Tab. J Prosthodont 2019;28:327-31. https://doi.org/10.1111/jopr.12585
  20. Ozdogan A, Ozdemir H. Effects of multiple firing processes on the mechanical properties of lithium disilicate glass-ceramics produced by two different production techniques. J Prosthet Dent 2021;125:527.e1-7. https://doi.org/10.1016/j.prosdent.2020.10.016