In vitro abrasion using an air-powder polishing device and its quantification by radiotracer measurement.
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.
Finke
C H
CH
Humboldt University, Department of Pediatric Dentistry, Berlin, Germany. christian.finke@charite.de
Radlanski
R J
RJ
Gawlik
D
D
Brätter
P
P
Gatschke
W
W
Rabe
H H
HH
Arens
B
B
Williams
S
S
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
D005899:Glass Ionomer Cements; D010895:Pit and Fissure Sealants