The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지
DOI QR코드

DOI QR Code

The effect of repeated firings on the color of zirconia-based all-ceramic system

반복 소성이 지르코니아 전부도재관의 색조에 미치는 영향

  • Jang, Jung-Eun (Department of Prosthodontics, School of Dentistry, Pusan National University) ;
  • Kim, Mu-Hyon (Department of Prosthodontics, School of Dentistry, Pusan National University) ;
  • Yun, Mi-Jung (Department of Prosthodontics, School of Dentistry, Pusan National University) ;
  • Jeong, Chang-Mo (Department of Prosthodontics, School of Dentistry, Pusan National University) ;
  • Jeon, Young-Chan (Department of Prosthodontics, School of Dentistry, Pusan National University)
  • 장정은 (부산대학교 치의학전문대학원 치과보철학교실) ;
  • 김무현 (부산대학교 치의학전문대학원 치과보철학교실) ;
  • 윤미정 (부산대학교 치의학전문대학원 치과보철학교실) ;
  • 정창모 (부산대학교 치의학전문대학원 치과보철학교실) ;
  • 전영찬 (부산대학교 치의학전문대학원 치과보철학교실)
  • Received : 2010.12.29
  • Accepted : 2011.01.14
  • Published : 2011.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

Purpose: The aim of this study was to evaluate the effect of repeated firings on the color of zirconia restoration with different shading method. Materials and methods: Three different types of zirconia frameworks (adding metallic pigments to the initial zirconia powder before sintering (Group NM), dipping the milled frameworks in dissolved coloring agents (Group KI), or application of liner material to the sintered white frameworks (Group KW) were used to support A3 shade dentin porcelain. Repeated firings (3, 5, or 7) were performed, color differences among ceramic specimens were measured using a colorimeter. Repeated measurements analysis of variance (ANOVA) was used to analyze the data for significant difference. The Tukey Honestly Significant Different (HSD) test was used to perform multiple comparisons (${\alpha}$ = .05). Results: 1. $L^*a^*b^*$ values of the ceramic systems were affected by the number of firings (1, 3, 5 or 7 firings) (P < .001) and shading methods (P < .001). 2. As the number of firings increased, the $L^*$ (for all groups) and $a^*$ value (for KW and NM groups) decreased and the $b^*$ value(for all groups) increased. 3. The mean color differences caused by repeated firings were perceptible (${\Delta}E$ > 1) for group KW and KI fired after 3 times, except for group NM fired after 7 times. 4. In order of decreasing ${\Delta}E$ value fired after 7 times, the values were group KI(${\Delta}E$ = 2.26) > group KW (${\Delta}E$ = 1.47) > group NM (${\Delta}E$ = 1.08) (P < .001). Conclusion: Repeated firings influenced the color of the zirconium-oxide all-ceramic specimens with different shading methods.

연구 목적: 각각 다른 방법으로 색조를 부여한 세 가지 지르코니아 전부도재관에서 반복소성이 전부도재관의 색조에 미치는 영향을 비교, 관찰하였다. 연구 재료 및 방법: 지르코니아 코어를 세가지 방법으로 착색(KW군: Masking liner를 사용하여 하부 코어색 차단, KI군: 지르코니아 코어를 금속 산화물 용액에 침전시켜 착색, NM군: 지르코니아 코어를 고온에서 소결하기 전에 금속산화물과 혼합하여 착색)하여 원반형 시편을 제작하였다. 지르코니아 코어 상방에 A3 색조의 상아질 도재를 소성하고 3, 5, 7회 반복소성 후 $L^*a^*b^*$ 값을 측정하여 비교하고 다른 두 가지 색의 3차원 공간에서의 거리를 나타내는 색차방정식을 이용하여 분석하였다. 측정된 결과는 반복측정 (repeated-measures ANOVA) 분석법과 Tukey 다중범위 검증법을 사용하여 소성횟수에 따른 색조변화를 유의수준 5%에서 검정하였다. 결과: 1. 모든 실험군에서 반복소성에 따른 $L^*a^*b^*$값의 변화가 관찰되었다 (P< .001). 2. 반복소성으로 $L^*$값과 $a^*$값 (KI군제외)은 감소하고 $b^*$값은 증가하는 경향을 보였다. 3. ${\Delta}E$값이 1이상 나타난 반복소성횟수는 KW군과 KI군은 3회 그리고NM군은 7회였다. 4. 7회 반복소성 후 ${\Delta}E$값은 KI군 (${\Delta}E$ = 2.26), KW군 (${\Delta}E$ = 1.47) 그리고 NM군 (${\Delta}E$ = 1.08) 순으로 높게 나타났다 (P< .001). 결론: 반복소성이 지르코니아 코어 색조를 부여방법에 따라 전부도재관의 색조에 미치는 영향을 끼쳤다.

Keywords

References

  1. Daniel C, Drummond J, Giordano RA. Improving Flexural Strength of Dental Restorative Ceramics Using Laser Interference Direct Structuring. J Am Ceram Soc 2008;91:3455-7. https://doi.org/10.1111/j.1551-2916.2008.02642.x
  2. Rosenblum MA, Schulman A. A review of all-ceramic restorations. J Am Dent Assoc 1997;128:297-307. https://doi.org/10.14219/jada.archive.1997.0193
  3. 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; 20:449-56. https://doi.org/10.1016/j.dental.2003.05.002
  4. Guazzato M, Albakry M, Swain MV, Ironside J. Mechanical properties of In-Ceram Alumina and In-Ceram Zirconia. Int J Prosthodont 2002;15:339-46.
  5. Jeong HC. Fracture strength of zirconia monolithic crowns. J Korean Acad Prosthdont 2006;44:157-64.
  6. Aboushelib MN, Kleverlaan CJ, Feilzer AJ. Effect of zirconia type on its bond strength with different veneer ceramics. J Prosthodont 2008;17:401-8. https://doi.org/10.1111/j.1532-849X.2008.00306.x
  7. Shah K, Holloway JA, Denry IL. Effect of coloring with various metal oxides on the microstructure, color, and flexural strength of 3Y-TZP. J Biomed Mater Res B Appl Biomater 2008;87:329-37.
  8. Yilmaz B, Ozçelik TB, Wee AG. Effect of repeated firings on the color of opaque porcelain applied on different dental alloys. J Prosthet Dent 2009;101:395-404. https://doi.org/10.1016/S0022-3913(09)60085-8
  9. Ozturk O, Uludag B, Usumez A, Sahin V, Celik G. The effect of ceramic thickness and number of firings on the color of two allceramic systems. J Prosthet Dent 2008;100:99-106. https://doi.org/10.1016/S0022-3913(08)60156-0
  10. Celik G, Uludag B, Usumez A, Sahin V, Ozturk O, Goktug G. The effect of repeated firings on the color of an all-ceramic system with two different veneering porcelain shades. J Prosthet Dent 2008;99: 203-8. https://doi.org/10.1016/S0022-3913(08)60044-X
  11. Devigus A, Lombardi G. Shading Vita YZ substructures: influence on value and chroma, part I. Int J Comput Dent 2004;7:293- 301.
  12. 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;88:4-9.
  13. Antonson SA, Anusavice KJ. Contrast ratio of veneering and core ceramics as a function of thickness. Int J Prosthodont 2001;14:316- 20.
  14. Lee YK, Cha HS, Ahn JS. Layered color of all-ceramic core and veneer ceramics. J Prosthet Dent 2007;97:279-86. https://doi.org/10.1016/j.prosdent.2007.03.010
  15. O'Brien WJ, Kay KS, Boenke KM, Groh CL. Sources of color variation on firing porcelain. Dent Mater 1991;7:170-3. https://doi.org/10.1016/0109-5641(91)90038-Z
  16. Uludag B, Usumez A, Sahin V, Eser K, Ercoban E. The effect of ceramic thickness and number of firings on the color of ceramic systems: an in vitro study. J Prosthet Dent 2007;97:25-31. https://doi.org/10.1016/j.prosdent.2006.11.002
  17. Crispin BJ, Hewlett E, Seghi R. Relative color stability of ceramic stains subjected to glazing temperatures. J Prosthet Dent 1991;66:20- 3. https://doi.org/10.1016/0022-3913(91)90345-W
  18. Lund PS, Piotrowski TJ. Color changes of porcelain surface colorants resulting from firing. Int J Prosthodont 1992;5:22-7.
  19. O'Brien WJ, Groh CL, Boenke KM. A new, small-color-difference equation for dental shades. J Dent Res 1990;69:1762-4. https://doi.org/10.1177/00220345900690111001
  20. American Dental Association Council on Scientific Affairs. Dental shade guides-acceptance program guidelines. Chicago; American Dental Association; 2001. pp. 4.
  21. Johnston WM, Kao EC. Assessment of appearance match by visual observation and clinical colorimetry. J Dent Res 1989;68:819- 22. https://doi.org/10.1177/00220345890680051301

Cited by

  1. 치과용 지르코니아 블럭의 착색시간에 따른 색조변화 관찰 vol.33, pp.3, 2011, https://doi.org/10.14347/kadt.2011.33.3.219
  2. Color change of polyetherketoneketone by layering step vol.44, pp.4, 2011, https://doi.org/10.14815/kjdm.2017.44.4.395