Effects of sintering temperature and particle size on the translucency of zirconium dioxide dental ceramic

The aim of this study was to evaluate the effects of sintering temperature and particle size on the translucency of yttrium stabilized tetragonal zirconia polycrystals (Y-TZP) dental ceramic. Eighty disc-shaped and cylindrical specimens were fabricated from zirconia powers of particle size 40 and 90 nm. These specimens were sintered densely at the final sintering temperature 1350, 1400, 1450 and 1500°C, respectively. The visible light transmittance, sintered density and microstructure of the sintered block were examined. The results showed that the sintered densities and transmittances increased with the temperature from 1,350 to 1,500°C. Y-TZP could gain nearly full density and about 17–18% transmittance at the final sintering temperature of 1,450–1,500°C. The 40-nm powders had higher sintered density and transmittance than the 90-nm. The translucency of Y-TZP dental ceramic could be improved by controlling the final sintering temperature and primary particle size.

[1]  R. T. Pascoe,et al.  Ceramic steel? , 1975, Nature.

[2]  A. Krell,et al.  Transmission physics and consequences for materials selection, manufacturing, and applications , 2009 .

[3]  A Schulman,et al.  A review of all-ceramic restorations. , 1997, Journal of the American Dental Association.

[4]  Rolf Apetz,et al.  Transparent Alumina: A Light‐Scattering Model , 2003 .

[5]  Zhimin Zhu,et al.  Translucency of newly extracted maxillary central incisors at nine locations. , 2008, The Journal of prosthetic dentistry.

[6]  J. Griggs,et al.  Influence of powder/liquid mixing ratio on porosity and translucency of dental porcelains. , 2004, The Journal of prosthetic dentistry.

[7]  W. D. Kingery,et al.  Introduction to Ceramics , 1976 .

[8]  Javier E. Garay,et al.  Transparent/translucent polycrystalline nanostructured yttria stabilized zirconia with varying colors , 2008 .

[9]  C. Stanford,et al.  Relative translucency of six all-ceramic systems. Part I: core materials. , 2002, The Journal of prosthetic dentistry.

[10]  S. K. Sadrnezhaad,et al.  Sintering of titania nanoceramic: Densification and grain growth , 2009 .

[11]  S. Campbell,et al.  Ceramics in dentistry: historical roots and current perspectives. , 1996, The Journal of prosthetic dentistry.

[12]  I. Denry,et al.  State of the art of zirconia for dental applications. , 2008, Dental materials : official publication of the Academy of Dental Materials.

[13]  Jiaping Han,et al.  Densification and grain growth of Al-doped ZnO , 2001 .

[14]  R. Giordano,et al.  Zirconia-Based Ceramics: Material Properties, Esthetics, and Layering Techniques of a New Veneering Porcelain, VM9 , 2005 .

[15]  Patrick M. Kelly,et al.  Transformation Toughening in Zirconia‐Containing Ceramics , 2004 .

[16]  Seiji Ban,et al.  Reliability and properties of core materials for all-ceramic dental restorations , 2008 .

[17]  A. Volceanov,et al.  NANOSTRUCTURED ZIRCONIA COMPOSITES STABILIZED WITH CeO2 FOR BIOMEDICAL APPLICATIONS , 2005 .

[18]  W. H. Rhodes,et al.  Agglomerate and Particle Size Effects on Sintering Yttria‐Stabilized Zirconia , 1981 .

[19]  R H Brodbelt,et al.  Translucency of Dental Porcelains , 1980, Journal of dental research.

[20]  K. Anusavice,et al.  Influence of P205, AgNO3, and FeCl3 on color and translucency of lithia-based glass-ceramics. , 1994, Dental materials : official publication of the Academy of Dental Materials.

[21]  P. Bowen,et al.  From powders to sintered pieces: forming, transformations and sintering of nanostructured ceramic oxides , 2002 .

[22]  Brian R Stoner,et al.  Dynamic fatigue and strength characterization of three ceramic materials , 2007, Journal of materials science. Materials in medicine.

[23]  K J Anusavice,et al.  Contrast ratio of veneering and core ceramics as a function of thickness. , 2001, The International journal of prosthodontics.

[24]  Michael V Swain,et al.  Strength, fracture toughness and microstructure of a selection of all-ceramic materials. Part II. Zirconia-based dental ceramics. , 2004, Dental materials : official publication of the Academy of Dental Materials.

[25]  R. C. Weast.  CRC Handbook of Chemistry and Physics , 1973 .

[26]  R Ruud Metselaar,et al.  Light scattering by pores in polycrystalline materials: Transmission properties of alumina , 1974 .

[27]  C. Piconi,et al.  Zirconia as a ceramic biomaterial. , 1999, Biomaterials.

[28]  C. Stanford,et al.  Relative translucency of six all-ceramic systems. Part II: core and veneer materials. , 2002, The Journal of prosthetic dentistry.

[29]  R. Smales,et al.  Translucency and biaxial flexural strength of four ceramic core materials. , 2008, Dental materials : official publication of the Academy of Dental Materials.

[30]  J. Mclean,et al.  Evolution of dental ceramics in the twentieth century. , 2001, The Journal of prosthetic dentistry.

[31]  W. Rhodes.  CONTROLLED TRANSIENT SOLID SECOND-PHASE SINTERING OF YTTRIA , 1981 .

[32]  I. Chen,et al.  Sintering dense nanocrystalline ceramics without final-stage grain growth , 2000, Nature.