title: The surface effects of erosion and abrasion on dentine with and without a protective layer.
abstract: OBJECTIVE
  The aim of this in situ study was to investigate with four imaging modalities whether covering dentine with adhesive resins could protect against erosion from acids. The objectives were to observe and quantify the effects of acids and the soft tissues, especially the tongue, on dentine and the bonding agents using four assessment techniques: qualitative assessment with SEM, surface roughness and thickness of resin with the TSM and volume loss with the laser profilometer.
  
  
  METHODS
  An in situ investigation using extracted dentine sections embedded in splints held on the palate of 10 volunteers. The dentine sections were protected by two resins and subjected to a tooth wear regime.
  
  
  RESULTS
  Both Seal and Protect and Opitbond Solo protected the tooth surfaces from a tooth wear regime. There were no statistical differences between the control surfaces and those protected with dentine bonding agents for resin thickness, roughness and profilometry. The appearance of the slabs under both confocal and SEM showed that the material remained in place despite a vigorous wear regime and therefore protected the tooth surface.
  
  
  CONCLUSIONS
  For patients with uncontrolled erosion or tooth wear, applying a dentine bonding agent to exposed dentine is a practical option to prevent further damage.
authors.affiliation: Research Assistant, Division of Conservative Dentistry, Guy's, King's and St Thomas' Dental Institute, King's College, London.
authors.forename: A
authors.initials: A
authors.lastname: Azzopardi
authors.forename: D W
authors.initials: DW
authors.lastname: Bartlett
authors.forename: T F
authors.initials: TF
authors.lastname: Watson
authors.forename: M
authors.initials: M
authors.lastname: Sherriff
mesh_terms: D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate / Q000627:therapeutic use*; D003804:Dentin; D017220:Dentin-Bonding Agents / Q000627:therapeutic use*; D006801:Humans; D007834:Lasers; D008297:Male; D008689:Methacrylates / Q000627:therapeutic use*; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000627:therapeutic use*; D013499:Surface Properties; D014072:Tooth Abrasion / Q000517:prevention & control*; D014077:Tooth Erosion / Q000517:prevention & control*
chemical_list: D017220:Dentin-Bonding Agents; D008689:Methacrylates; C428805:OptiBond SOLO; D019279:Resin Cements; C442646:Seal and Protect resin cement; D017438:Bisphenol A-Glycidyl Methacrylate