title: Sorption characteristics of oral/food simulating liquids by the dental light-cured nanohybrid composite Kalore GC.
abstract: OBJECTIVE
  This work presents the results obtained from the study of sorption/desorption process of some food/oral simulating liquids (FSLs) by the new marketed dental light-cured nanohybrid composite Kalore GC.
  
  
  METHODS
  The sorption/desorption process followed is recommended by ISO 4049:2009. The samples were immersed in various liquids proposed by ADA as FSLs, such as H2O, artificial saliva, EtOH, EtOH/H2O solution (75vol%) or C7H16, while the mass change for totally 30 days was recorded on defined time intervals. Afterwards the samples were put in dry desiccators at 37°C for the study of desorption process.
  
  
  RESULTS
  The weight percentage of sorption of the above mentioned FSLs by Kalore GC was determined; also the wt% of the desorbed liquid, the diffusion coefficient of sorption and desorption, the wt% solubility and the % volume increase due to the liquid sorption.
  
  
  CONCLUSIONS
  The sorption characteristics of a dental composite depend both on composite structure and liquid. Ethanol/water and ethanol showed the highest effect on the determined characteristics. Then, the water and SAGF(®) saliva follows and finally the heptane solvent.
authors.affiliation: Laboratory of Organic Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki GR-54 124, Macedonia, Greece. Electronic address: siderid@chem.auth.gr.
authors.forename: Irini D
authors.initials: ID
authors.lastname: Sideridou
authors.affiliation: Laboratory of Organic Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki GR-54 124, Macedonia, Greece.
authors.forename: Evangelia C
authors.initials: EC
authors.lastname: Vouvoudi
authors.affiliation: Laboratory of Organic Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki GR-54 124, Macedonia, Greece.
authors.forename: Ina V
authors.initials: IV
authors.lastname: Keridou
mesh_terms: D000327:Adsorption; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003729:Dental Care / Q000379:methods; D003890:Desiccation; D000431:Ethanol / Q000737:chemistry; D006801:Humans; D008970:Molecular Weight; D049329:Nanostructures / Q000737:chemistry*; D012463:Saliva / Q000737:chemistry; D012995:Solubility; D013329:Structure-Activity Relationship; D014867:Water / Q000737:chemistry
chemical_list: D003188:Composite Resins; D014867:Water; D000431:Ethanol
keywords: Desorption; Diffusion coefficient; Food/oral simulating liquids; Kalore GC; Solubility; Sorption