Color Stability of Bulk-Fill Resin Composites after Immersion in Different Media

Sungkyoon Kang; Jihyun Song

Journal of the Korean academy of pediatric dentistry

Abbr : J Korean Acad Pediatr Dent
2019, 46(4), pp.353-361
Publisher : The Korean Academy Of Pediatric Dentistry
Research Area : Dentistry

Sungkyoon Kang ¹, Jihyun Song ²

¹원광대학교 치과대학 소아치과학교실
²원광대학교

ABSTRACT

The aim of this study was to evaluate the color stability of bulk-fill and conventional resin composites with respect to different storage media and thickness of composites. Filtek™ Z250 and Filtek™ Z350XT were evaluated as conventional resin composites. Filtek™ Bulk-fill Posterior Restorative and Tetric® N-Ceram Bulk Fill were evaluated as bulk-fill resin composites. CIE L*a*b* values of baseline were measured after 24 hours of storage in distilled water, and each resin composite group was divided into three subgroups and stored in distilled water, red wine, and coffee media respectively. Again after 1, 7 and 28 days of immersion, color changes (ΔE*) were calculated using the CIE L*a*b* values. The greatest ΔE* was observed in red wine for all resin composites, and the mean color changes were ranked in the increasing order of distilled water, coffee, red wine. Filtek™ Z350XT exhibited the greatest color change in all media, followed by Filtek™ Bulk-fill Posterior Restorative. Filtek™ Z250 and Tetric® N-Ceram Bulk Fill followed with similar mean color change values. According to the 2 different thicknesses of 2 mm and 4 mm of bulk-fill resin composites, there was no thickness-related difference on color changes.
KEYWORDS

Color stability, Bulk-fill resin composites, Restorative materials
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