Release of fluoride from glass polyalkenoate (ionomer) cement subjected to radiant heat.
OBJECTIVE
This study was designed to examine the effect of the application of radiant heat on the fluoride release from the surface of a glass polyalkenoate cement.


METHODS
The radiant heat was applied at different intensities and for different time intervals using a high-intensity fibreoptic quartz halogen light source. A standard technique was used to measure the amount of fluoride released from one surface of a cement specimen into deionized water. Fluoride release was measured for a time period of over 2 years.


RESULTS
Results showed that fluoride was still being released 2 years after placement. The application of radiant heat did not have a statistically significant effect on the release of fluoride from the surface of this material.


CONCLUSIONS
There appeared to be a trend suggesting that the greater the amount of heat applied, the less fluoride was released from the surface of the cement. A considerable inter- and intrabatch variation was noted in the amount of fluoride released from the cement.
Woolford
M J
MJ
Department of Conservative Dentistry, Dental School, University of Dundee, UK.
Grieve
A R
AR
D005336:Fiber Optic Technology / Q000295:instrumentation; D005459:Fluorides / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006358:Hot Temperature; D008027:Light; D013499:Surface Properties; D013997:Time Factors
D005899:Glass Ionomer Cements; D005459:Fluorides