Effect of staining solutions on the colour stability of direct resin composite

ABSTRACT

Resin-based composite dentures or teeth are used as replacement of missing teeth. Their success depends largely on their colour stability as they undergo discoloration after prolonged exposure in oral environment and therefore, need replacement for esthetic reasons. To evaluate the colour stability of a nanofill composite resin [Filtek Z350] when exposed to different immersion media. Study design and settings An in-vitro experimental study was carried out at Dr. Ishrat-ul-ebad Khan Institute of Oral Health Sciences and colour testing was done at Al Karam textiles limited. Forty resin-based composite specimens measuring 1 mm. of thickness and 5x5 mm. in length and breadth were prepared using a plastic sheet. Specimens were light-cured for 20 seconds from both sides and were randomized into 4 groups [n=10] according to immersion solutions distilled water [control], coke, turmeric powder solution and coffee solution. Specimens were left immersed in these solutions for 10 days A digital spectrophotometer was used to evaluate the colour changes after 10-days and the colour differences [deltaE] were analyzed using paired t-test [p < 0.05]. After 10 days of immersion in coffee solution, coke and turmeric powder solution specimens showed significant colour change. The turmeric powder exhibited maximum staining followed by coffee and coke. The composite resin was susceptible to staining by coffee, turmeric powder and coke