title: Retrospective radiation dosimetry using electron paramagnetic resonance in canine dental enamel.
abstract: Electron paramagnetic resonance (EPR) biodosimetry of human tooth enamel has been widely used for measuring radiation doses in various scenarios. We have now developed EPR dosimetry in tooth enamel extracted from canines. Molars and incisors from canines were cleaned by processing in supersaturated aqueous potassium hydroxide solution. The dosimetric signal in canine tooth enamel was found to increase linearly as a function of laboratory added dose from 0.44+/-0.02 to 4.42+/-0.22 Gy. The gamma radiation sensitivity of the canine molar enamel was found to be comparable to that of human tooth enamel. The dosimetric signal in canine enamel has been found to be stable up to at least 6 weeks after in vitro irradiation. A dosimetric signal variation of 10-25% was observed for canines ranging from in age 3 years to 16 year old.
authors.affiliation: Medical Physics & Applied Radiation Sciences, McMaster University, 1280 Main Street West, Hamilton, ON, Canada, L8S 4M1. khanrf@mcmaster.ca
authors.forename: Rao F H
authors.initials: RF
authors.lastname: Khan
authors.forename: J
authors.initials: J
authors.lastname: Pekar
authors.forename: W J
authors.initials: WJ
authors.lastname: Rink
authors.forename: D R
authors.initials: DR
authors.lastname: Boreham
mesh_terms: D000818:Animals; D001822:Body Burden; D004285:Dogs; D004307:Dose-Response Relationship, Radiation; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D006801:Humans; D066298:In Vitro Techniques; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012062:Relative Biological Effectiveness; D015203:Reproducibility of Results; D012189:Retrospective Studies; D018570:Risk Assessment / Q000379:methods*; D012680:Sensitivity and Specificity; D013045:Species Specificity; D014070:Tooth / Q000737:chemistry* / Q000528:radiation effects*