Color stability of bulk-fill flowable composite Vs conventional flowable composite after accelerated aging. Comparative in-vitro study

Abstract

This study was carried out to compare the color stability of two different types of resin composite after accelerated aging. Specimens of X-tra base (VOCO GmbH) bulk fill flowable composite and Grandio flow (VOCO GmbH) flowable composite were aged in a weather chamber device for 296 hours with a total energy of 300 kilojoules. Color assessments were done before and after aging. The color change was calculated from the following equation: ?E= [(?L) 2 + (?a) 2 + (?b) 2] 1/2. Results showed significant color changes for both composite types after aging with both showing nearly equal ?E values. It was concluded that the two types of tested resin composites lacked the ability to maintain their color after aging and that bulk fill flowable composite did not show any significant improvement regarding color stability. 2010 RJPBCS.