Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
권호 표지
DOI QR코드

DOI QR Code

The effect of repeat processing on the color stability of lithium disilicate glass-ceramic

리튬디실리케이트 글라스-세라믹의 반복 성형이 색 안정성에 미치는 영향

  • Jeon, Byung-Wook (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan)
  • 전병욱 (부산가톨릭대학교 보건과학대학 치기공학과)
  • Received : 2021.11.15
  • Accepted : 2021.11.23
  • Published : 2021.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

Purpose: This study investigates the effect of repeated use of lithium disilicate glass-ceramics on color stability. Methods: In this study, 2 types of lithium disilicate glass-ceramics were used and they were divided into 4 groups after 1st, 2nd, 3rd, and 4th heat pressing. The L*, a*, and b* values of all specimens were measured using the VITA Easyshade Advance 4.0. These values was used to determine the ∆E value and transparency. IBM SPSS Statistics ver. 24.0, a statistical significance level of 0.05 and one-way ANOVA were used for all data. Results: In all groups, the L* and b* values were the lowest in the specimens subjected to the 4th heat pressing and the corresponding a* value was the highest. All specimens showed ∆E values of ≤3.3, indicating color changes that were not visible with the naked eye, and the color difference increased with the number of repeated heat pressing. The transparency of all specimens decreased as the number of repeated uses increased. Conclusion: According to the number of repeated heat pressing, the color difference of Rosetta SP (HASSBIO) was larger than that of IPS e.max Press (Ivoclar Vivadent), but it was clinically acceptable in all groups. Moreover, transparency decreased as the number of heat presses increased in all groups. According to the above findings, the lithium disilicate glass-ceramic has high color stability due to repeated heat pressing, implying that it can be used in clinical settings regularly.

Keywords

Acknowledgement

This paper was supported by 2020 RESEARCH FUND offered from Catholic University of Pusan.

References

  1. Oh SC, Dong JK, Luthy H, Scharer P. Flexure strength and microstructure of IPS Empress 2 glass-ceramic on heat-pressing and heat treatments. J Korean Acad Prosthodont. 2000;38:575-582.
  2. Holand W, Schweiger M, Frank M, Rheinberger V. A comparison of the microstructure and properties of the IPS Empress 2 and the IPS Empress glass-ceramics. J Biomed Mater Res. 2000;53:297-303. https://doi.org/10.1002/1097-4636(2000)53:4<297::AID-JBM3>3.0.CO;2-G
  3. von Clausbruch SC, Schweiger M, Holand W, Rheinberger V. The effect of P2O5 on the crystallization and microstructure of glass-ceramics in the SiO2-Li2O-K2O-ZnO-P2O5 system. J Non Cryst Solids. 2000;263-264:388-394. https://doi.org/10.1016/S0022-3093(99)00647-X
  4. Gresnigt MM, Ozcan M, van den Houten ML, Schipper L, Cune MS. Fracture strength, failure type and Weibull characteristics of lithium disilicate and multiphase resin composite endocrowns under axial and lateral forces. Dent Mater. 2016;32:607-614. https://doi.org/10.1016/j.dental.2016.01.004
  5. Fasbinder DJ, Dennison JB, Heys D, Neiva G. A clinical evaluation of chairside lithium disilicate CAD/CAM crowns: a two-year report. J Am Dent Assoc. 2010;141 Suppl 2:10S-14S. https://doi.org/10.14219/jada.archive.2010.0355
  6. Gorman CM, McDevitt WE, Hill RG. Comparison of two heat-pressed all-ceramic dental materials. Dent Mater. 2000;16:389-395. https://doi.org/10.1016/S0109-5641(00)00031-2
  7. Lee HH, Lee BT. Mechanical properties and microstructure of dental heat-pressable glass-ceramics. J Korean Ceram Soc. 2004;41:143-150. https://doi.org/10.4191/KCERS.2004.41.2.143
  8. Lim CH, Shin JW, Seok JJ, Ji JH, Lee MH, Bae TS. Effect of repeat processing on mechanical properties of two pressable glass-ceramic dental materials. Korean J Dent Mater. 2014;41:1-8. https://doi.org/10.14815/kjdm.2014.41.1.1
  9. Won DH. Effect of repeating the heat pressing procedure on the fracture toughncss of heat-pressable glass-ceramics. Korean J Dent Mater. 2002;29:363-368.
  10. Son OS, Kim YL, Lee KJ, Jin TH. Surface hardness and pressing accuracy of reused IPS Empress 2. J Korean Acad Prosthodont. 2003;41:596-605.
  11. Song YK, Kim YL, Kim SH, Ahn HY, Jin TH. Flexure strength and color change of reused IPS Empress 2. J Korean Acad Prosthodont. 2003;41:71-80.
  12. Chung KH, Liao JH, Duh JG, Chan DC. The effects of repeated heat-pressing on properties of pressable glassceramics. J Oral Rehabil. 2009;36:132-141. https://doi.org/10.1111/j.1365-2842.2008.01909.x
  13. Gorman CM, Horgan K, Dollard RP, Stanton KT. Effects of repeated processing on the strength and microstructure of a heat-pressed dental ceramic. J Prosthet Dent. 2014;112:1370-1376. https://doi.org/10.1016/j.prosdent.2014.06.015
  14. Lim CH, Shin JW, Seok JJ, Ji JH, Lee MH, Bae TS. Effect of repeat processing on mechanical properties of two pressable glass-ceramic dental materials. Korean J Dent Mater. 2014;41:1-8. https://doi.org/10.14815/kjdm.2014.41.1.1
  15. Kang W, Kim JH. Effect of translucency on CAD/CAM ceramic according to different core/veneer thickness. J Korean Soc Dent Hyg. 2018;18:1037-1045.
  16. Dong-Dong Q, Lei Z, Xiaoping L, Wenli C. [Effect of repeated sintering on the color and translucency of dental lithium disilicate-based glass ceramic]. Hua Xi Kou Qiang Yi Xue Za Zhi. 2015;33:50-53. Chinese.
  17. Johnston WM, Ma T, Kienle BH. Translucency parameter of colorants for maxillofacial prostheses. Int J Prosthodont. 1995;8:79-86.
  18. Kelly JR, Benetti P. Ceramic materials in dentistry: historical evolution and current practice. Aust Dent J. 2011;56 Suppl 1:84-96. https://doi.org/10.1111/j.1834-7819.2010.01299.x
  19. Bangtson LK, Goodkind RJ. The conversion of Chromascan designations to CIE tristimulus values. J Prosthet Dent. 1982;48:610-617. https://doi.org/10.1016/0022-3913(82)90372-9
  20. Hyun HK. A study on the colors of the anterior primary resin teeth. J Korean Acad Pediatr Dent. 2007;34:639-645.
  21. Inokoshi S, Burrow MF, Kataumi M, Yamada T, Takatsu T. Opacity and color changes of tooth-colored restorative materials. Oper Dent. 1996;21:73-80.
  22. Wozniak WT. Proposed guidelines for the acceptance program for dental shade guides. Am Den Assoc. 1987;1-2.
  23. Della Bona A, Nogueira AD, Pecho OE. Optical properties of CAD-CAM ceramic systems. J Dent. 2014;42:1202-1209. https://doi.org/10.1016/j.jdent.2014.07.005
  24. Kim SJ, Kahm SH. Translucency of ceramic veneers on glazing effect. J Korean Acad Prosthodont. 2015;53:138-143. https://doi.org/10.4047/jkap.2015.53.2.138