title: Sorption and solubility of resin-based restorative dental materials.
abstract: OBJECTIVE
  To measure the water sorption and solubility of different resin-based restorative dental materials.
  
  
  METHODS
  Eight commercial restorative materials were selected: two resin composites (Z100 and Prodigy), four polyacid-modified resin composites (Compoglass, Compoglass F, Dyract and Dyract AP), and two light-cured glass ionomers (Vitremer and Fuji II LC). Five disc specimens were prepared of each material, following the manufacturer's instructions, and were grounded wet with silicon carbide paper. Water sorption and solubility of the different materials were calculated by means of weighting the samples before and after water immersion and desiccation. Data were analyzed by one-way ANOVA and Student-Newman-Keuls tests (P<0.05).
  
  
  RESULTS
  Compoglass and Compoglass F showed the lowest values of water sorption and solubility, while Vitremer and Fuji II LC displayed the highest values. Solubility values of Prodigy, Z100, Dyract and Dyract AP did not show significant differences among them, while their water sorption values attained some differences and were lower for Prodigy followed by Dyract and Z100.
  
  
  CONCLUSIONS
  The attained water sorption and solubility values are mainly influenced by the generic type of material and variations occurring between materials of the same type may result from differences in resin matrix compositions.
authors.affiliation: Department of Dental Materials, University of Granada, Granada, Spain. toledano@platon.ugr.es
authors.forename: Manuel
authors.initials: M
authors.lastname: Toledano
authors.forename: Raquel
authors.initials: R
authors.lastname: Osorio
authors.forename: Estrella
authors.initials: E
authors.lastname: Osorio
authors.forename: Victoria
authors.initials: V
authors.lastname: Fuentes
authors.forename: Carlo
authors.initials: C
authors.lastname: Prati
authors.forename: Franklin
authors.initials: F
authors.lastname: Garcia-Godoy
mesh_terms: D000042:Absorption; D000327:Adsorption; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D003890:Desiccation; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D007101:Immersion; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D012117:Resins, Synthetic / Q000737:chemistry; D017655:Silicon Compounds / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D012995:Solubility; D013499:Surface Properties; D014867:Water / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry
chemical_list: D017554:Carbon Compounds, Inorganic; C105428:Compoglass; D020770:Compomers; D003188:Composite Resins; D003764:Dental Materials; C088486:Dyract; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; C099128:Prodigy; D012117:Resins, Synthetic; D017655:Silicon Compounds; C084550:Vitremer; C083568:Z100 composite resin; D014867:Water; D012822:Silicon Dioxide; D015040:Zirconium; C022088:silicon carbide