title: Color change of some aesthetic dental materials: Effect of immersion solutions and finishing of their surfaces.
abstract: OBJECTIVE
  The purpose of this research was to evaluate the color change of five aesthetic dental materials, before and after immersion in distilled water and blue food color solution for 7 and 21 days, and to study the effect of finishing the surfaces on any color change.
  
  
  METHODS
  Disc shaped samples of five types of light curing composite (A2) (n = 10 samples/composite) were prepared and all samples were light-cured with a Plasma Arc light cure unit for ten seconds. One side of each sample disc was finished and polished with a Super-Snap system all samples. After 24 h, color measurements of each sample were conducted using a digital spectrophotometer. Five sample discs from each composite group were immersed in 30 ml of food color solution for 7 and 21 days, while the remaining five sample discs were immersed in 30 ml of distilled water as a control. Color measurements were repeated for all samples at 7 and 21 days after immersion. The color changes were statistically analyzed using t-tests within the same group. A result was considered statistically significant at α = 0.05.
  
  
  RESULTS
  The color differences (ΔE) ranged from 0.4 to 4.66 and statistically significant differences on the finished and unfinished surfaces were observed after immersion in the food color solution for 7 days. No significant differences were found in any group after immersion in the food color solution for 21 days. The Tetric EvoCeram and Arabesk groups showed less color differences after 7 and 21 days than other composites.
  
  
  CONCLUSIONS
  Finished composite surfaces showed less coloration than unfinished surfaces after 7 days, but all surfaces (finished and unfinished) were highly colored for all composite types after 21 days.
authors: Department of Conservative Dentistry, Faculty of Dentistry, University of Aleppo, Aleppo, Syria.
authors: Elizabeth
authors: E
authors: Sarkis
keywords: Color change; Color stability; Composite; Dental restoration; Surface finishing
references: Br Dent J. 2004 Jan 10;196(1):42-5; discussion 31
references: 14966503
references: J Prosthet Dent. 2006 Feb;95(2):137-42
references: 16473088
references: J Prosthet Dent. 2009 Mar;101(3):193-9
references: 19231572
references: Dent Mater. 1986 Oct;2(5):225-7
references: 3468026
references: J Oral Rehabil. 2002 Sep;29(9):895-901
references: 12366588
references: Quintessence Int. 1997 Jun;28(6):409-14
references: 9477906
references: J Prosthet Dent. 2002 Mar;87(3):264-70
references: 11941352
references: J Dent. 2009 Dec;37(12):913-22
references: 19674824
references: J Dent Res. 1989 May;68(5):819-22
references: 2715476
references: J Prosthet Dent. 1998 Apr;79(4):372-7
references: 9576308
references: Oper Dent. 1997 Nov-Dec;22(6):260-5
references: 9610323
references: Quintessence Int. 1991 Jun;22(6):447-52
references: 1882037
references: J Oral Rehabil. 1995 Jun;22(6):445-9
references: 7636615
references: J Prosthet Dent. 1998 Nov;80(5):533-9
references: 9813802
references: J Dent Res. 1985 Nov;64(11):1326-31
references: 2936780
references: Oper Dent. 1996 Mar-Apr;21(2):73-80
references: 8957922
references: J Esthet Restor Dent. 2004;16(5):290-301; discussion 301-2
references: 15726798
references: Oper Dent. 2000 Nov-Dec;25(6):520-5
references: 11203865
references: Dent Mater. 1997 Mar;13(2):89-97
references: 9467310
references: Eur J Oral Sci. 2005 Jun;113(3):251-7
references: 15953251
references: Dent Mater. 1990 Oct;6(4):282-7
references: 2150825
references: Acta Odontol Scand. 1983;41(1):11-8
references: 6575570
references: Dent Mater J. 1995 Jun;14(1):23-30
references: 8940542
references: SSO Schweiz Monatsschr Zahnheilkd. 1976 Aug;86(8):812-24
references: 1066815
references: Dent Mater. 1989 Nov;5(6):384-7
references: 2639838
references: Int Dent J. 2007 Oct;57(5):324-30
references: 17992918
references: Dent Mater. 2007 Jun;23(6):696-704
references: 16899289
references: Oper Dent. 2008 Jul-Aug;33(4):413-20
references: 18666499
references: J Prosthet Dent. 1991 Apr;65(4):491-5
references: 1829763
references: J Prosthet Dent. 1984 Dec;52(6):811-4
references: 6595392
references: J Dent Res. 1984 Oct;63(10):1248-54
references: 6592209
references: J Dent Res. 1981 May;60(5):890-4
references: 6452468
references: J Am Dent Assoc. 2004 May;135(5):587-94; quiz 654
references: 15202750
references: Dent Mater. 1994 Nov;10(6):353-62
references: 7498599
references: Quintessence Int. 1991 May;22(5):377-86
references: 1924691