title: Effect of gap dimension on wear resistance of luting agents.
abstract: OBJECTIVE
  To examine the correlation between horizontal gap width and wear depth of luting resin cements and a glass ionomer used with resin composite inlays.
  
  
  METHODS
  A cylindrical cavity (4 x 3 mm) was made on the occlusal surface of molars. Four specimens were prepared for each luting agent. The samples were subjected to a three-body wear test for 400,000 cycles. The wear values of both composite and luting agents were determined by profilometric tracings to the nearest 2 micrometers. The relationship between gap width and wear depth was confirmed by linear regression analysis.
  
  
  RESULTS
  Significant relationships existed amongst gap width, cement wear and type of cement. The effects were considerably less pronounced with microfilled cements.
authors.affiliation: Department of Operative Dentistry, The Nippon Dental University, School of Dentistry at Niigata, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Shinkai
authors.forename: S
authors.initials: S
authors.lastname: Suzuki
authors.forename: K F
authors.initials: KF
authors.lastname: Leinfelder
authors.forename: Y
authors.initials: Y
authors.lastname: Katoh
mesh_terms: D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003738:Dental Cements / Q000737:chemistry*; D018772:Dental Marginal Adaptation; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D007284:Inlays; D016014:Linear Models; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008963:Molar; D010316:Particle Size; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D005899:Glass Ionomer Cements; C086630:TwinLook cement; C069103:Dual Cement; D017438:Bisphenol A-Glycidyl Methacrylate; C037885:Fuji-ionomer