Short and long term effects of additional post curing and polishing systems on the color change of dental nano-composites


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EĞİLMEZ F., ERGÜN G., ÇEKİÇ NAGAŞ I., Vallittu P. K. , Lassila L. V. J.

DENTAL MATERIALS JOURNAL, vol.32, no.1, pp.107-114, 2013 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 1
  • Publication Date: 2013
  • Doi Number: 10.4012/dmj.2012-251
  • Journal Name: DENTAL MATERIALS JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.107-114
  • Gazi University Affiliated: Yes

Abstract

The purpose was to determine the short and long term effects of polishing systems and post-heat-light curing on the color stability of nano-composites. The disc shaped samples (empty set=10 mm, h=3 mm) were prepared. Forty subgroups (n=5) were designed according to two different curing conditions and five different polishing methods. Color change measurements were performed on the day of specimen preparation (base) and repeated after 1 and 7 months of water storage. MANOVA and Tukey's post hoc tests were applied (p<0.05). While the color difference values of resin composites were ranked as EXP2>EXP1>CME>XTE after 1 month (p<0.05), after 7 months the ranking was EXP2>EXP1>XTE>CME (p<0.05). Type and compositions of nano-composites may be important on the long-term color stability of the restoration. Additional post-heat-light curing of nano-composites may produce higher color change than the hand-light curing protocol. Consequently, the polishing procedures should be applied to obtain more resistant composite surface to discoloration.