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Changes in the paramagnetic centres in irradiated and heated dental enamel studied using electron paramagnetic
J E Aldrich1, B Pass, C Mailer
1Cancer Treatment and Research Foundation of Nova Scotia, Halifax, Canada.
International Journal of Radiation Biology
|March 1, 1992
Abstract:
The EPR signals in dental enamel produced by radiation and by heat were studied. The inherent background signal at g = 2.005, and a radiation-produced signal at g = 2.002 have different saturation behaviour with microwave power, and this affords a method of signal optimization. Heating enamel at temperatures from 100 degrees C to 450 degrees C produces a range of radical species from g = 2.002 to g = 2.005, which have been characterized by their g-values, line widths and saturation behaviour. Standard dental drilling produces a range of radicals which appear to be similar to those produced by heat.