An audit of shade reproduction of fixed metal ceramic prostheses

Eur J Prosthodont Restor Dent. 2011 Sep;19(3):94-8.


This investigation aimed to evaluate the colour difference between metal ceramic restorations and their corresponding shades and any reasons for a colour mismatch in the dental laboratory. The colour of 50 consecutive metal ceramic restorations produced in a laboratory was measured using a spectrophotometer and compared to the shade tabs. Colour reproduction was optimal at porcelain thicknesses between 1.4-1.6 mm, varied between technicians within the same laboratory and was better for shades in the 2M group. Most crowns were above the threshold for a clinically acceptable shade match and almost all crowns were lighter than the corresponding shade tab.

Publication types

  • Comparative Study

MeSH terms

  • Color
  • Crowns*
  • Dental Audit*
  • Dental Porcelain / chemistry*
  • Dental Prosthesis Design
  • Denture Design
  • Denture, Partial, Fixed*
  • Humans
  • Laboratories, Dental
  • Metal Ceramic Alloys / chemistry*
  • Prosthesis Coloring / instrumentation
  • Prosthesis Coloring / standards*
  • Spectrophotometry
  • Surface Properties


  • Metal Ceramic Alloys
  • Dental Porcelain