title: Grit blasting and the marginal accuracy of two ceramic veneer systems--a pilot study.
abstract: BACKGROUND
  Margins of ceramic restorations can be damaged during removal of investment materials with grit blasting and result in relatively large marginal discrepancies and excessive marginal discrepancies with greater exposure of cement to the oral environment. Subsequent dissolution of cement can encourage plaque retention, dental caries, and periodontal problems.
  
  
  OBJECTIVE
  This study compared marginal adaptation of ceramic veneers created by the refractory die technique (R), Dicor glass ceramic technique (D), and effects of grit blasting on their margins.
  
  
  METHODS
  Two groups of ceramic veneers were constructed for each system, one without grit blasting (R g and D g) and one with grit blasting (R+g and D+g).
  
  
  RESULTS
  Statistical analyses revealed that grit blasting had a greater effect in reducing marginal accuracy for Dicor ceramic veneers compared with refractory die ceramic veneers.
authors.affiliation: Department of Restorative Dentistry, National University of Singapore, Singapore.
authors.forename: C
authors.initials: C
authors.lastname: Lim
authors.forename: J G
authors.initials: JG
authors.lastname: Ironside
mesh_terms: D000388:Air; D000537:Aluminum Oxide; D002516:Ceramics / Q000737:chemistry*; D003731:Dental Caries / Q000209:etiology; D003734:Dental Casting Investment / Q000737:chemistry; D003735:Dental Casting Technique; D003738:Dental Cements / Q000737:chemistry; D018772:Dental Marginal Adaptation; D003773:Dental Plaque / Q000209:etiology; D003776:Dental Porcelain / Q000737:chemistry; D003801:Dental Veneers; D005898:Glass / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D010510:Periodontal Diseases / Q000209:etiology; D010865:Pilot Projects; D011312:Pressure; D012995:Solubility; D013499:Surface Properties
chemical_list: D003734:Dental Casting Investment; D003738:Dental Cements; C047475:Dicor ceramic; D003776:Dental Porcelain; D000537:Aluminum Oxide