In vitro abrasion using an air–powder polishing device and its quantification by radiotracer measurement

Objectives. 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. Significance. 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.