Masking ability of zirconia with and without veneering porcelain.

  title={Masking ability of zirconia with and without veneering porcelain.},
  author={Yeon-Jo Choi and Michael E. Razzoog},
  journal={Journal of prosthodontics : official journal of the American College of Prosthodontists},
  volume={22 2},
PURPOSE The present study compared changes in CIE L*a*b* color coordinates of substrates of different colors when covered with zirconium oxide discs (Procera) and with such discs if veneered with two shades of porcelain. MATERIAL AND METHODS Forty background substrates were fabricated and divided into four groups depending on the color of the substrates: white, black, gray, and tooth-colored (Vita shade A3). The initial color of the substrates was measured using a colorimeter. The color of… CONTINUE READING

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Handling guidelines for Nobel Procera zirconia copings and frameworks

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