title: Various Effects of Sandblasting of Dental Restorative Materials.
abstract: BACKGROUND
  Sandblasting particles which remain on the surfaces of dental restorations are removed prior to cementation. It is probable that adhesive strength between luting material and sandblasting particle remnants might exceed that with restorative material. If that being the case, blasting particles adhere to sandblasted material surface could be instrumental to increasing adhesive strength like underlying bonding mechanism between luting material and silanized particles of tribochemical silica coating-treated surface. We hypothesize that ultrasonic cleaning of bonding surfaces, which were pretreated with sandblasting, may affect adhesive strength of a resin luting material to dental restorative materials.
  
  
  METHODS
  We therefore observed adhesive strength of resin luting material to aluminum oxide was greater than those to zirconia ceramic and cobalt-chromium alloy beforehand. To measure the shear bond strengths of resin luting material to zirconia ceramic and cobalt-chromium alloy, forty specimens of each restorative material were prepared. Bonding surfaces were polished with silicon abrasive paper and then treated with sandblasting. For each restorative material, 40 sandblasted specimens were equally divided into two groups: ultrasonic cleaning (USC) group and non-ultrasonic cleaning (NUSC) group. After resin luting material was polymerized on bonding surface, shear test was performed to evaluate effect of ultrasonic cleaning of bonding surfaces pretreated with sandblasting on bond strength.
  
  
  RESULTS
  For both zirconia ceramic and cobalt-chromium alloy, NUSC group showed significantly higher shear bond strength than USC group.
  
  
  CONCLUSIONS
  Ultrasonic cleaning of dental restorations after sandblasting should be avoided to retain improved bonding between these materials.
authors.affiliation: Occlusion and Removable Prosthodontics, Okayama University Hospital, Okayama, Japan.
authors.forename: Goro
authors.initials: G
authors.lastname: Nishigawa
authors.affiliation: Occlusion and Removable Prosthodontics, Okayama University Hospital, Okayama, Japan.
authors.forename: Yukinori
authors.initials: Y
authors.lastname: Maruo
authors.affiliation: Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
authors.forename: Masao
authors.initials: M
authors.lastname: Irie
authors.affiliation: Department of Occlusal and Oral Functional Rehabilitation, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Maeda
authors.affiliation: Center for Innovative Clinical Medicine, Okayama University Hospital, Okayama, Japan.
authors.forename: Kumiko
authors.initials: K
authors.lastname: Yoshihara
authors.affiliation: Laboratory for Electron Microscopy, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Nagaoka
authors.affiliation: Department of Biomaterials, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Matsumoto
authors.affiliation: Department of Occlusal and Oral Functional Rehabilitation, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
authors.forename: Shogo
authors.initials: S
authors.lastname: Minagi
mesh_terms: D003764:Dental Materials / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D055595:Mechanical Phenomena
chemical_list: D003764:Dental Materials