Ceramic materials have a wide range of use in the clinical treatment, and its superior esthetic property wins the popularity among the patients. Ceramic materials can not only mimic the colour of the nature teeth, but also have the outstanding esthetic property due to its translucency. Among the research of these years, except the elements of colour, people pay more attention to the translucency of the ceramic materials, but it differs widely among the ways to measure the translucency. This review is about the translucency of ceramic materials, measuring methods and measuring appliances, hoping to give some references to relative clinical researches.
