Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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Color Stability of Bulk-Fill Resin Composites after Immersion in Different Media

다양한 용액에 따른 Bulk-fill 복합레진의 색조안정성 평가

  • Kang, Sungkyoon (Department of Pediatric Dentistry, College of Dentistry, Wonkwang University) ;
  • Song, Jihyun (Department of Pediatric Dentistry, College of Dentistry, Wonkwang University)
  • 강성균 (원광대학교 치과대학 소아치과학교실) ;
  • 송지현 (원광대학교 치과대학 소아치과학교실)
  • Received : 2019.07.12
  • Accepted : 2019.08.19
  • Published : 2019.11.30
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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.

이 연구의 목적은 bulk-fill 복합레진과 전통적인 복합레진을 대상으로 다양한 용액과 시편의 두께에 따른 색조안정성의 차이를 평가하는 것이다. 전통적인 복합레진으로 Filtek™ Z250, Filtek™ Z350XT와, bulk-fill 복합레진으로 Filtek™ Bulk-fill Posterior Restorative, Tetric® N-Ceram Bulk Fill이 사용되었다. 각 복합레진 시편은 3개의 군으로 나누어 각각 증류수, 레드와인, 커피 용액에 침전시킨 뒤, 침전 1, 7, 28일에 색조 측정을 시행하여 각 시점과 초기 기준점의 CIE L*a*b*값의 색차(ΔE*)가 계산되었다. 모든 복합레진은 레드와인에서 가장 큰 색조변화가 나타났으며, 그 다음은 커피, 증류수 순서였다. Filtek™ Z350XT는 모든 용액에서 가장 큰 색조변화를 나타냈고, 다음은 Filtek™ Bulk-fill Posterior Restorative였다. 그 뒤로는 Filtek™ Z250과 Tetric® N-Ceram Bulk Fill이 유사한 수준의 색조변화를 나타냈다. Bulk-fill 복합레진에서 2 mm와 4 mm인 시편의 두께에 따른 색조변화의 차이는 나타나지 않았다.

Keywords

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