A1 Refereed original research article in a scientific journal
Short and long term effects of additional post curing and polishing systems on the color change of dental nano-composites
Authors: Egilmez F, Ergun G, Cekic-Nagas I, Vallittu PK, Lassila LVJ
Publisher: JAPANESE SOC DENTAL MATERIALS DEVICES
Publication year: 2013
Journal: Dental Materials Journal
Journal name in source: DENTAL MATERIALS JOURNAL
Journal acronym: DENT MATER J
Number in series: 1
Volume: 32
Issue: 1
First page : 107
Last page: 114
Number of pages: 8
ISSN: 0287-4547
DOI: https://doi.org/10.4012/dmj.2012-251
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.
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.
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