title: Changes in the mechanical properties and surface texture of compomer immersed in various media.
abstract: BACKGROUND
  Limited information is available about the mechanical behavior of compomer under intraoral conditions.
  
  
  OBJECTIVE
  This in vitro study evaluated changes in the mechanical properties and surface texture of compomer and other materials, used in similar clinical circumstances, when immersed in various media.
  
  
  METHODS
  Hardness measurement for 5 tested materials and 4 immersion media was obtained with a Vickers hardness testing machine. Compressive strength was measured using an Autograph at a crosshead speed of 0.75 mm/min. All readings were taken for up to a 60-day period. An electron probe microanalyzer was used to give an SEM image.
  
  
  RESULTS
  The average compressive strength and Vickers surface hardness showed a significant difference between materials. Results showed an overall increase in the solubility of specimens immersed in low pH soft drinks.
  
  
  CONCLUSIONS
  There was a difference in the mechanical properties and surface texture of the materials tested in this study when they were immersed in various media.
authors.affiliation: Niigata University, Faculty of Dentistry, Niigata, Japan. neamat@dent.niigata-u.ac.jp
authors.forename: N
authors.initials: N
authors.lastname: Abu-Bakr
authors.forename: L
authors.initials: L
authors.lastname: Han
authors.forename: A
authors.initials: A
authors.lastname: Okamoto
authors.forename: M
authors.initials: M
authors.lastname: Iwaku
mesh_terms: D000434:Alcoholic Beverages; D001628:Beverages; D002253:Carbonated Beverages; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D019245:Compressive Strength; D004577:Electron Probe Microanalysis; D005899:Glass Ionomer Cements / Q000737:chemistry; D006244:Hardness; D006245:Hardness Tests; D006863:Hydrogen-Ion Concentration; D007101:Immersion; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D017640:Silicates / Q000737:chemistry; D012995:Solubility; D013499:Surface Properties; D014867:Water
chemical_list: C112828:Clearfil AP-X; C105428:Compoglass; D020770:Compomers; D003188:Composite Resins; C088486:Dyract; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D008689:Methacrylates; D012117:Resins, Synthetic; D017640:Silicates; C417842:Xeno compomer; D014867:Water