The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

SPECTROPHOTOMETRIC ANALYSIS OF THE INFLUENCE OF ZIRCONIA CORE ON THE COLOR OF CERAMIC

지르코니아 코아가 전부도재관의 색조에 미치는 영향에 대한 분광측색분석

  • Pae Ah-Ran (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University) ;
  • Baik Jin (Department of Dentistry, Asan Medical Center) ;
  • Woo Yi-Hyung (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University) ;
  • Kim Hyung-Sup (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University) ;
  • Choi Dae-Gyun (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University)
  • 배아란 (경희대학교 치과대학 치과보철학교실) ;
  • 백진 (서울아산병원 치과) ;
  • 우이형 (경희대학교 치과대학 치과보철학교실) ;
  • 김형섭 (경희대학교 치과대학 치과보철학교실) ;
  • 최대균 (경희대학교 치과대학 치과보철학교실)
  • Published : 2005.08.01
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Abstract

Statement of problem : Problem of matching the appearance of porcelain restorations with the patient's natural dentition has always been a concern to dental clinicians. Recently, demands for esthetics, even in restorations requiring strength, has brought a revolution to dentistry and increased use of zirconia. Among the various factors, shade and translucency or the core can significantly affect the overall esthetics of the restoration and should be considered when selecting an all-ceramic system. Purpose : The purpose of this study was to spectrophotometrically evaluate the influence of different zirconia systems and core thickness on the final shade of all-ceramic restorations using the CIEL$^*a^*b^*$ system. Material and Methods: Core specimens (n : 20 per group) of In-Ceram Alumina, In-Ceram Zirconia, Digident CAD/CAM Zirconia, Cercon Zirconia were fabricated 20mm in diameter. 10 specimens of each group were fabricated at core thickness of 0.5mm and 0.7mm. These core specimens were veneered with shade Al & A3 porcelain of the recommended manufacturer. CIEL$^*a^*b^*$ coordinates were recorded for each specimen with a spectrophotometer (Model CM-2600d, Minolta, Japan). Color differences were calculated using the equation ${\Delta}E^*=[({\Delta}L^*)^2+({\Delta}a^*)^2+({\Delta}b^*)^2]^{\frac{1}{2}}$. Results : 1. Specimens of core thickness 0.5mm and 0.7mm did not exhibit clinically perceived color difference. 2. Regarding shade reproducibility, In-Ceram Alumina and In-Ceram Zirconia showed significant difference within each group. 3. Cercon Zirconia group showed the highest $L^*$ value and Digident Zirconia group showed lowest $a^*$ & $b^*$ value. 4. Generally the shade difference between materials was higher in the A3 shade group than in the Al shade group. Conclusion: Within the limitations of this study, there was no color difference after increase in core thickness and every all-ceramic system has color characteristics that clinicians have to consider when selecting materials. Also, manufacturers of different porcelain systems must make every effort to achieve color reproducibility.

Keywords

References

  1. 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
  2. Probster L, Diehl J. Split casting alumina ceramics for crowns and bridge restorations. Quintessence lnt 1992:23:25-31
  3. Surez MJ, Lozano JFL, Salido MP, Martnez F. Three-year clinical evaluation of InCeram Zirconia posterior FPDs. Int J Prosthodont 2004; 17: 35-38
  4. Seghi R, Johnston W, O' Brien W. Spectrophotometric analysis of color differences between porcelain systems. J Prosthet Dent 1986; 56: 35-40 https://doi.org/10.1016/0022-3913(86)90279-9
  5. Kelly JR, Nishimura I, Campbell SD. Ceramics in dentistry: historical roots and current perspectives. J Prosthet Dent 1996:75: 18-32 https://doi.org/10.1016/S0022-3913(96)90413-8
  6. James LR, Femaree RG. Wolf G. Estimating within-group inter-rater reliability with and without bias. Journal of Applied Psychology 1984;69(1):85-98 https://doi.org/10.1037/0021-9010.69.1.85
  7. Macentee M, Lakowski R. Instrumental color measurement of vital and extracted human teeth. J Oral Rehabil 1981:8:203-208 https://doi.org/10.1111/j.1365-2842.1981.tb00494.x
  8. Seghi RR. Effects of instrumental-measuring geometry on colorimetric assessments of dental porcelains. J Dent Res 1990;69:1180-1184 https://doi.org/10.1177/00220345900690051101
  9. Jorgensen MW, Goodkind RJ. Spectrophotometic study of five porcelains relative to the dimensions of color, porcelain thickness, and repeated firings. J Prosthet Dent 1979;2:96-105
  10. Seghi RR, Hewlett ER, Kim J. Visual and instrumental colorimetric assessment of small color differences on translucent dental porcelain. J Dent Res 1989;68:1760-1764 https://doi.org/10.1177/00220345890680120801
  11. Van der' Burgt TP, ten Bosch JJ, Borsboom PC, Kortsmit WJ. Comparison of new and conventional methods of quantification of tooth color. J Prosthet Dent 1990;63: 155-162 https://doi.org/10.1016/0022-3913(90)90099-X
  12. Paul S, Peter A, Pietrobon N, Hammerle CHF. Visual and spectrophotometric shade analysis of human teeth. J Dent Res 2002:81(8) :572-582 https://doi.org/10.1177/154405910208100814
  13. Bangston LK, Goodkind RJ. The conversion of chromascan designations to CIE tristimulus values. J Prosthet Dent 1982:47: 610-617
  14. Kim YH. Study on the color stability of veneer resin. J Korean Acad Conservative Dent 1991:16:1-5
  15. Douglas RD. Color stability of new-generation indirect resins for prosthodontic application. J Prosthet Dent 2000:83:166-170 https://doi.org/10.1016/S0022-3913(00)80008-6
  16. Johnston WM. Kao EC. Assessment of appearance match by visual observation and clinical colorimetry. J Dent Res 1989: 68:819-822 https://doi.org/10.1177/00220345890680051301
  17. O' Brien WJ, Groh CL, Boenke KM. A new. small-color-difference equation for dental shades. J Dent Res 1990:69(1):1762-1764 https://doi.org/10.1177/00220345900690111001
  18. Wozniak WT. Proposed guidelines for the acceptance program for dental shade guides. American dental association. Chicago. 1987: 1-2
  19. Shmizu K, Oka M. Kumar P, Kotoura Y. Yamamuro T. Makinouchi K. Time-dependent changes in the mechanical properties of zirconia ceramic. J Biomed Mater Res 1993:27:729-734
  20. Luthardt RG, Kolzhuter M, Sandkuhl O, Herold V, Schnapp JD, Kuhlish E. Reliability and properties of ground Y-TZP-zirconia ceramics. J Dent Res 2002:1:487-491
  21. Sundh A, Sjogren G. A comparison of fracture strength of yttrium-oxide-partially-stabilized zirconia ceramic crowns with varying core thickness. shades and veneer ceramics. J of Oral Rehabilitation 2004: 31:682-688 https://doi.org/10.1111/j.1365-2842.2004.01284.x
  22. Tinschert J, Natt G, Mautsch W, Augthum M, Spiekermann H. Fracture resistance of lithium disilicatc-, alumina-. and zirconiabased three-unit fixed partial dentures: A laboratory study. lnt J Prosthodont 2001: 14: 231-238
  23. McLaren EA, White SN. Glass-infiltrated zirconia/alumina-based ceramic for crowns and fixed partial dentures. Pract Periodontic Aesthet Dent 1999: 11 :985-994
  24. Chong K. Chai J, Takahashi Y, Wozniak W. Flexural strength of In-Ceram Alumina and In-Ceram Zirconia core materials. lnt J Prosthodont 2002; 15: 183-188
  25. Chiche GJ, Pinault A. Esthetics of anterior fixed prosthodontics. Chicago: Quintessence: 1994. p. 97-113
  26. Jacobs SH, Goodacre CJ, Moore BK. Dykema RW. Effect of porcelain thickness and type of metal-ceramic alloy on color. J Prosthet Dent 1987: 57: 138-145 https://doi.org/10.1016/0022-3913(87)90135-1
  27. O' Brien WJ, Johnston WJ, Fanian F. Double-layer color effects in porcelain systems. J Dent Res 1985: 64: 940-943 https://doi.org/10.1177/00220345850640061801
  28. Douglas RD, Przybylska M. Predicting porcelain thickness required for dental shade matches. J Prosthet Dent 1999: 82:143-149 https://doi.org/10.1016/S0022-3913(99)70147-2
  29. Lee SO, Woo YH. Choi DG, Kwon KR. Spectrophotometric analysis of the influence of metal substrate on the color of ceramic. J Korean Acad Prosthodont 2003: 41: 148-159
  30. Heffernan MJ, Aquilino SA, Diaz -Arnold AM, Haselton DR, Stanford CM, Vargas MA. Relative translucency of six all-ceramic systems. Part Lcore materials. J Prosthet Dent 2002:88:4-9
  31. Heffernan MJ, Aquilino SA, Diaz-Arnold AM, Haselton DR, Stanford CM, Vargas MA. Relative translucency of six all-ceramic systems. Part Il.core and veneer materials. J Prosthet Dent 2002:88:10-15