"Effect of multiple firing on the color stability, translucency and flexural strength of recent lithium disilicate material machinable and pressable"

Abstract

This study was designed to evaluate the effect of the multiple firings on color, translucency and biaxial flexure strength of pressable and machinable lithium disilicate ceramic. The most common technique to build a restoration is to form a core then cut back the incisal area to create mamelons and characteristics by the application of various incisal porcelains then fired to attain a full contoured restoration. To produce a natural appearance with correct form and color the all ceramic restoration is fired several times. There it is crucial evaluate the effect of these firings on the restoration Twenty-one specimens were prepared into discs of 10mm diameter and 1mm thickness of Rosetta SP and Rosetta SM each were tested for color stability, translucency and biaxial flexural strength after 1st,3rd and 5th firings.