title: In vitro abrasion using an air-powder polishing device and its quantification by radiotracer measurement.
abstract: OBJECTIVE
  This study was conducted to examine the assessment of abrasion of two different materials after neutron activation.
  
  
  METHODS
  A fissure sealant material (Fissurit F/VOCO with a compressive strength of 235 MPa) and a glass ionomer cement (Aqua Ionofil/VOCO with a compressive strength of 170 MPa) were activated by irradiation with neutrons. Subsequent measurements of the full-energy-peak (FEP) (1368.55 keV of 24Na) were made of the sample materials before and after abrasion via exposure to the air-powder polishing to accurately describe substance loss.
  
  
  RESULTS
  Abrasion varied more than three-fold between the two materials.
  
  
  CONCLUSIONS
  Neutron activation and radiotracer measurement allows the quantification of abrasion effects in different materials. In comparison with other current methods its use may allow a superior measurement accuracy and precision in determining the abraded mass.
authors.affiliation: Humboldt University, Department of Pediatric Dentistry, Berlin, Germany. christian.finke@charite.de
authors.forename: C H
authors.initials: CH
authors.lastname: Finke
authors.forename: R J
authors.initials: RJ
authors.lastname: Radlanski
authors.forename: D
authors.initials: D
authors.lastname: Gawlik
authors.forename: P
authors.initials: P
authors.lastname: Brätter
authors.forename: W
authors.initials: W
authors.lastname: Gatschke
authors.forename: H H
authors.initials: HH
authors.lastname: Rabe
authors.forename: B
authors.initials: B
authors.lastname: Arens
authors.forename: S
authors.initials: S
authors.lastname: Williams
mesh_terms: D020906:Air Abrasion, Dental / Q000379:methods*; D003775:Dental Polishing / Q000379:methods*; D005720:Gamma Rays; D005899:Glass Ionomer Cements / Q000737:chemistry; D009501:Neutron Activation Analysis; D010895:Pit and Fissure Sealants / Q000737:chemistry
chemical_list: D005899:Glass Ionomer Cements; D010895:Pit and Fissure Sealants