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Colour stability of porcelain repair materials with accelerated ageing
Author(s) -
SAYGILI G.,
ŞAHMALI S.,
DEMIREL F.
Publication year - 2006
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.2005.01409.x
Subject(s) - colorimeter , ageing , colour difference , significant difference , dentistry , materials science , mathematics , medicine , statistics , physics , quantum mechanics , optics
summary The purpose of this study was to measure and compare the colour stability of three porcelain repair materials (Charizma, Clearfil and Silux Plus) with an all‐ceramic material following accelerated ageing. Three composites and one ceramic control were subjected to accelerated ageing for a period of 300 h. Initial specimen colour parameters were determined in the Commission International de I'Eclairage Lab (CIELAB) colour order system with a colorimeter. Colour changes were calculated before (Δ E ) and after 300 h of accelerated ageing (Δ E *). Colour difference data were subjected to one‐way analysis of variance ( anova ) followed by Duncan's test to examine the interaction between material and time interval of ageing. There were no significant difference between Δ L values of Porcelain‐Charizma and Porcelain‐Silux Plus. All mean Δ L * values were negative after 300 h ageing. Porcelain‐Silux Plus demonstrated the highest Δ L * of the investigated groups. There were significant differences between baseline 300‐h aged specimens with respect to Δ a *, Δ a for either of the investigated materials. For Silux Plus, Δ a and Δ a * values were significantly higher than the others. Significant differences were observed between baseline and 300‐h values for Δ b and Δ b *. Δ b and Δ b * values were significantly higher for Silux Plus. There were significant differences between baseline and 300‐h values of colour difference, Δ E , Δ E *. Highest Δ E * value was obtained using the microfilled composite, Silux Plus. Lowest value of Δ E was recorded with the hybrid composite, Charizma.