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Water Sorption, Solubility, and Color Stability of Giomer Restoratives
Author(s) -
Gonulol Nihan,
Ozer Sezin,
Sen Tunc Emine
Publication year - 2014
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/jerd.12119
Subject(s) - solubility , sorption , chemistry , aqueous solution , composite number , materials science , nuclear chemistry , adsorption , composite material , organic chemistry
Objectives This study compared the color stability, water sorption, and solubility of a giomer composite and two nanohybrid composite resins. Materials and Methods Disc‐shaped specimens (1‐mm thickness × 15‐mm diameter) of a giomer ( B eautifil II , S hofu, K yoto, J apan) and two nanohybrid ( F iltek Z 550, 3 M ESPE , S t. P aul, MN , USA ; T etric N ‐ C eram, I voclar V ivadent, S chaan, L iechtenstein) composites ( N = 10) were prepared. Baseline color measurements were taken, and specimens were immersed in water for 28 days. Following immersion, color values were remeasured, and color‐change values (Δ E ) were calculated. Water sorption and solubility were assessed by mass gain or loss after storage in water for 28 days. Data were analyzed with one‐way analysis of variance and T ukey's post‐hoc tests ( p = 0.05). P earson's correlation test was used to assess possible correlations between water sorption and solubility, water sorption and color stability, and solubility and color stability ( p = 0.05). Results Water sorbtion (%) and color change (Δ E ) varied significantly among groups, with B eautifil II exhibiting the highest values ( p < 0.001). No statistically significant differences were observed in water solubility values among the groups (p = 0.661); however, a linear, positive correlation was detected between solubility and discoloration ( r = 0.368, p = 0.046). Conclusion Water sorption and discoloration values of the giomer composite group were significantly higher than those of the nanohybrids tested. Clinical Significance The high levels of water sorption and discoloration of giomer composites are likely to have an adverse effect on esthetic restorations.