The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Choice of resin cement shades for a high-translucency zirconia product to mask dark, discolored or metal substrates

  • Dai, Shiqi (Jiangsu Key Laboratory of Oral Diseases: Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University) ;
  • Chen, Chen (Jiangsu Key Laboratory of Oral Diseases: Department of Endodontics, Affiliated Hospital of Stomatology, Nanjing Medical University) ;
  • Tang, Mo (Jiangsu Key Laboratory of Oral Diseases: Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University) ;
  • Chen, Ying (Jiangsu Key Laboratory of Oral Diseases: Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University) ;
  • Yang, Lu (Jiangsu Key Laboratory of Oral Diseases: Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University) ;
  • He, Feng (Jiangsu Key Laboratory of Oral Diseases: Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University) ;
  • Chen, Bingzhuo (Jiangsu Key Laboratory of Oral Diseases: Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University) ;
  • Xie, Haifeng (Jiangsu Key Laboratory of Oral Diseases: Department of Prosthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University)
  • Received : 2019.07.28
  • Accepted : 2019.10.29
  • Published : 2019.10.31
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Abstract

PURPOSE. The aim was to study the masking ability of high-translucency monolithic zirconia and provide guidance in selecting resin luting cements in order to mask discolored substrates. MATERIALS AND METHODS. 160 high-translucency zirconia specimens were divided into 32 groups depending on their thickness and shades. Using five shades of try-in paste, the specimens were luted onto the substrates (Co-Cr, precious-metal, opaque porcelain-sintered Co-Cr, opaque porcelain-sintered precious-metal, and 5M3-shade zirconia). All CIELAB color parameters were measured and statistically analyzed. RESULTS. Zirconia shade and thickness and try-in paste shade affected CIELAB color parameters (P=.000) in different substrates groups, and there were interactions among these factors (P=.000). All five try-in paste shades can be chosen to achieve ${\Delta}E$ values of zirconia with 1.2 - 1.5 mm for masking dark-tooth-like 5M3-shade and zirconia with 1.5 mm for masking precious-metal groups < 2.6. Only suitable try-in paste shades were used, can ${\Delta}E$ values that less than 2.6 be achieved when applied translucent monolithic zirconia with 0.7-1.0 mm for masking dark-tooth-like 5M3-shade and zirconia with 0.7 - 1.2 mm for masking precious-metal groups. CONCLUSION. Choosing suitable resin cement shades is necessary for high-translucency monolithic zirconia to achieve ideal masking ability (${\Delta}E$ < 2.6) on the dark-tooth.

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