Optical properties of dental ceramics

Abstract

Achieving successful aesthetics with a restoration is a difficult process due to the complex optical characteristics of tooth colour. The tooth reflects, absorbs, diffuses and transmits light reaching its surface. Thus, for acceptable aesthetic results, favourable shade matching of the all ceramic restorations should be achieved by controlling the reflection, transmission and light absorption of dental ceramic materials. Optical properties of ceramic materials are the main factors responsible for the natural appearance of the ceramic restorations. These properties are affected by several factors such as: composition, crystalline content, porosity, additives, grain size and the angle on incidence of light.