The effect of repeated firings on the color change of dental ceramics using different glazing methods
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PURPOSE. Surface color is one of the main criteria to obtain an ideal esthetic. Many factors such as the type of the material, surface specifications, number of firings, firing temperature and thickness of the porcelain are all important to provide an unchanged surface color in dental ceramics. The aim of this study was to evaluate the color changes in dental ceramics according to the material type and glazing methods, during the multiple firings. MATERIALS AND METHODS. Three different types of dental ceramics (IPS Classical metal ceramic, Empress Esthetic and Empress 2 ceramics) were used in the study. Porcelains were evaluated under five main groups according to glaze and natural glaze methods. Color changes (ΔE) and changes in color parameters (ΔL, Δa, Δb) were determined using colorimeter during the control, the first, third, fifth, and seventh firings. The statistical analysis of the results was performed using ANOVA and Tukey test. RESULTS. The color changes which occurred upon material-method-firing interaction were statistically significant (P<.05). ΔE, ΔL, Δa and Δb values also demonstrated a negative trend. The MC-G group was less affected in terms of color changes compared to other groups. In all-ceramic specimens, the surface color was significantly affected by multiple firings. CONCLUSION. Firing detrimentally affected the structure of the porcelain surface and hence caused fading of the color and prominence of yellow and red characters. Compressible all-ceramics were remarkably affected by repeated firings due to their crystalline structure.
Abstract
PURPOSE. Surface color is one of the main criteria to obtain an ideal esthetic. Many factors such as the type of the material, surface specifications, number of firings, firing temperature and thickness of the porcelain are all important to provide an unchanged surface color in dental ceramics. The aim of this study was to evaluate the color changes in dental ceramics according to the material type and glazing methods, during the multiple firings. MATERIALS AND METHODS. Three different types of dental ceramics (IPS Classical metal ceramic, Empress Esthetic and Empress 2 ceramics) were used in the study. Porcelains were evaluated under five main groups according to glaze and natural glaze methods. Color changes (ΔE) and changes in color parameters (ΔL, Δa, Δb) were determined using colorimeter during the control, the first, third, fifth, and seventh firings. The statistical analysis of the results was performed using ANOVA and Tukey test. RESULTS. The color changes which occurred upon material-method-firing interaction were statistically significant (P<.05). ΔE, ΔL, Δa and Δb values also demonstrated a negative trend. The MC-G group was less affected in terms of color changes compared to other groups. In all-ceramic specimens, the surface color was significantly affected by multiple firings. CONCLUSION. Firing detrimentally affected the structure of the porcelain surface and hence caused fading of the color and prominence of yellow and red characters. Compressible all-ceramics were remarkably affected by repeated firings due to their crystalline structure.
참고문헌 (46)
- Ozturk O., "The effect of ceramic thickness and number of firings on the color of two all-ceramic systems", J Prosthet Dent, 100, pp.99~106 (2008)
- Johnston WM., "Assessment of appearance match by visual observation and clinical colorimetry", J Dent Res, 68, pp.819~822 (1989)
- Ruyter IE., "Color stability of dental composite resin materials for crown and bridge veneers", Dent Mater, 3, pp.246~251 (1987)
- Berns RS., "Billmeye and Saltzman’s principles of color technology", pp.71~74 (2000), John Wiley & Sons
- Bolt RA., "Influence of window size in small-window colour measurement, particularly of teeth", Phys Med Biol, 39, pp.1133~1142 (1994)
- O’Brien WJ., "Sources of color variation on firing porcelain", Dent Mater, 7, pp.170~173 (1991)
- Hammad IA., "A qualitative study for the bond and color of ceramometals. Part II", J Prosthet Dent, 65, pp.169~179 (1991)
- Brewer JD., "Clinical discrimination between autoglazed and polished porcelain surfaces", J Prosthet Dent, 64, pp.631~634 (1990)
- Jacobs SH., "Effect of porcelain thickness and type of metal-ceramic alloy on color", J Prosthet Dent, 57, pp.138~145 (1987)
- Shokry TE., "Effect of core and veneer thicknesses on the color parameters of two all-ceramic systems", J Prosthet Dent, 95, pp.124~129 (2006)
- Jorgenson MW., "Spectrophotometric study of five porcelain shades relative to the dimensions of color, porcelain thickness, and repeated firings", J Prosthet Dent, 42, pp.96~105 (1979)
- Barghi N., "Optimum thickness of opaque and body porcelain", J Prosthet Dent, 48, pp.429~431 (1982)
- Douglas RD., "Predicting porcelain thickness required for dental shade matches", J Prosthet Dent, 82, pp.143~149 (1999)
- Lee YK., "Layered color of all-ceramic core and veneer ceramics", J Prosthet Dent, 97, pp.279~286 (2007)
- Antonson SA., "Contrast ratio of veneering and core ceramics as a function of thickness", Int J Prosthodont, 14, pp.316~320 (2001)
- Dozić A., "The influence of porcelain layer thickness on the final shade of ceramic restorations", J Prosthet Dent, 90, pp.563~570 (2003)
- Barghi N, Goldberg., "Porcelain shade stability after repeated firing", J Prosthet Dent, 37, pp.173~175 (1977)
- Barghi N., "A study of various factors influencing shade of bonded porcelain", J Prosthet Dent, 39, pp.282~284 (1978)
- Uludag B., "The effect of ceramic thickness and number of firings on the color of ceramic systems : an in vitro study", J Prosthet Dent, 97, pp.25~31 (2007)
- Bertolotti RL., "Dental materials and their selection", pp.483~494 (1985), Quintessence
- Tucillo JJ., "Dental casting alloys in our changing times. 2. Ceramic alloys", Dent Tech, 27, pp.114~116 (1974)
- Brewer JD., "Spectrometric analysis of the influence of metal substrates on the color of metal-ceramic restorations", J Dent Res, 64, pp.74~77 (1985)
- Höland W., "A comparison of the microstructure and properties of the IPS Empress 2 and the IPS Empress glass-ceramics", J Biomed Mater Res, 53, pp.297~303 (2000)
- Chiche GJ., "Esthetics of anterior fixed prosthodontics", pp.97~113 (1994), Quintessence
- Kingery WD., "Introduction to ceramics", pp.646~689 (1976), John Wiley&Sons
- Heffernan MJ., "Relative translucency of six all-ceramic systems. Part I : core materials", J Prosthet Dent, 88, pp.4~9 (2002)
- Sahin V., "The effect of repeated firings on the color of an alumina ceramic system with two different veneering porcelain shades", J Prosthet Dent, 104, pp.372~378 (2010)
- Seghi RR., "Relative flexural strength of six new ceramic materials", Int J Prosthodont, 8, pp.239~246 (1995)
- Wagner WC., "Biaxial flexural strength and indentation fracture toughness of three new dental core ceramics", J Prosthet Dent, 76, pp.140~144 (1996)
- Kelly JR., "Ceramics in dentistry : historical roots and current perspectives", J Prosthet Dent, 75, pp.18~32 (1996)
- Giordano RA., "Dental ceramic restorative systems", Compend Contin Educ Dent, 17, pp.779~456 (1996)
- Lee YK., "Effect of surface conditions on the color of dental resin composites", J Biomed Mater Res, 63, pp.657~663 (2002)
- Knispel G., "Factors affecting the process of color matching restorative materials to natural teeth", Quintessence Int, 22, pp.525~531 (1991)
- Yilmaz B., "Effect of repeated firings on the color of opaque porcelain applied on different dental alloys", J Prosthet Dent, 101, pp.395~404 (2009)
- Mulla FA., "Effects of temperature on color stability of porcelain stains", J Prosthet Dent, 65, pp.507~512 (1991)
- Kim IJ., "Effect of surface topography on the color of dental porcelain", J Mater Sci Mater Med, 14, pp.405~409 (2003)
- Lund PS., "Color changes of porcelain surface colorants resulting from firing", Int J Prosthodont, 5, pp.22~27 (1992)
- Celik G., "The effect of repeated firings on the color of an all-ceramic system with two different veneering porcelain shades", J Prosthet Dent, 99, pp.203~208 (2008)
- O’Brien WJ., "Sources of color variation on firing porcelain", Dent Mater, 7, pp.170~173 (1991)
- Vinay Chila Bachhav, "The effect of ceramic thickness and number of firings on the color of a zirconium oxide based all ceramic system fabricated using CAD", CAM technology, 2011, pp.3(2), 57~62[DOI]
- Crispin BJ., "Effect of different metal ceramic alloys on the color of opaque and dentin porcelain", J Prosthet Dent, 65, pp.351~356 (1991)
- Barghi N., "Color and glaze : effects of repeated firings", J Prosthet Dent, 47, pp.393~395 (1982)
- Seghi RR., "Performance assessment of colorimetric devices on dental porcelains", J Dent Res, 68, pp.1755~1759 (1989)
- van der Burgt TP., "A comparison of new and conventional methods for quantification of tooth color", J Prosthet Dent, 63, pp.155~162 (1990)
- Heffernan MJ., "Relative translucency of six all-ceramic systems. Part II : core and veneer materials", J Prosthet Dent, 88, pp.10~15 (2002)
- Tylman SD., "Theory and practice of crown and bridge", pp.562~563 (1970), CV Mosby Co.
