226Ra concentration in the teeth of habitants of areas with high level of natural radioactivity in Ramsar

Aghamiri, Seyed Mahmoud Reza; Ghorbani, Zahra; Darafsheh, Arash; Torabzadeh, Hassan; Fathivand, A. A.; Minuchehr, A.; Jalinoos, Alireza

doi:10.1016/j.jenvrad.2006.05.008

Cited by 16 publications

(10 citation statements)

References 10 publications

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“…With respect to natural radionuclides, 226 Ra, a daughter nuclide in the 238 U series, has been identified in permanent teeth from Japan different concentrations among regions 18 . The activity concentration of 226 Ra is higher in teeth from inhabitants living in areas of high, compared with low natural background radiation areas in Ramsar 29 . The low-background, well-type Ge detector identified 214 Pb, a daughter radionuclide in the 238 U series, in deciduous teeth.…”

Section: Discussionmentioning

confidence: 88%

Radioactivity and radionuclides in deciduous teeth formed before the Fukushima-Daiichi Nuclear Power Plant accident

Takahashi

Chiba

Tanahara

et al. 2021

Sci Rep

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The Fukushima-Daiichi Nuclear Power Plant (FNPP) accident in March of 2011 released substantial amounts of radionuclides into the environment. We collected 4,957 deciduous teeth formed in children before the Fukushima accident to obtain precise control data for teeth formed after the accident. Radioactivity was measured using imaging plates (IP) and epidemiologically assessed using multivariate regression analysis. Additionally, we measured 90Sr, 137Cs, and natural radionuclides which might be present in teeth. Epidemiological studies of IP showed that the amount of radioactivity in teeth from Fukushima prefecture was similar to that from reference prefectures. We found that artificial radionuclides of 90Sr and 137Cs, which were believed to have originated from past nuclear disasters, and natural radionuclides including 40 K and daughter nuclides in the 238U and 232Th series contributed to the generation of radioactivity in teeth. We also found no evidence to suggest that radionuclides originating from the FNPP accident significantly contaminated pre-existing teeth. This is the first large-scale investigation of radioactivity and radionuclides in teeth. The present findings will be indispensable for future studies of teeth formed after the FNPP accident, which will fall out over the next several years and might be more contaminated with radionuclides.

show abstract

Section: Discussionmentioning

confidence: 88%

Radioactivity and radionuclides in deciduous teeth formed before the Fukushima-Daiichi Nuclear Power Plant accident

Takahashi

Chiba

Tanahara

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…With respect to natural radionuclides, 226 Ra, a daughter nuclide in the 238 U series, has been identi ed in permanent teeth from Japan different concentrations among regions 17 . The activity concentration of 226 Ra is higher in teeth from inhabitants living in areas of high, compared with low natural background radiation areas in Ramsar 28 . The low-background, well-type Ge detector identi ed 214 Pb, a daughter radionuclide in the 238 U series, in deciduous teeth.…”

Section: Discussionmentioning

confidence: 88%

Radioactivity and radionuclides in deciduous teeth formed before the Fukushima-Daiichi Nuclear Power Plant accident

Takahashi

Chiba

Tanahara

et al. 2021

Preprint

View full text Add to dashboard Cite

The Fukushima-Daiichi Nuclear Power Plant (FNPP) accident in March 2011 released substantial amounts of radionuclides into the environment. We collected 4,957 deciduous teeth formed in children before the Fukushima accident to obtain precise control data for teeth formed after the accident. Radioactivity was measured using imaging plates (IP) and epidemiologically assessed using multivariate regression analysis. Additionally, we measured 90Sr, 137Cs, and natural radionuclides which might be present in teeth. Epidemiological studies of IP showed that the amount of radioactivity in teeth from Fukushima prefecture was similar to that from reference prefectures. We found that artificial radionuclides of 90Sr and 137Cs, which were believed to have originated from past nuclear disasters, and natural radionuclides including 40K and daughter nuclides in the 238U and 232Th series contributed to the generation of radioactivity in teeth. We also found no evidence to suggest that radionuclides originating from the FNPP accident significantly contaminated pre-existing teeth. This is the first large-scale investigation of radioactivity and radionuclides in teeth. The present findings will be indispensable for future studies of teeth formed after the FNPP accident, which will fall out over the next several years and might be more contaminated with radionuclides.

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“…The majority of human radiation exposure originates from natural sources (1) . We annually receive some mSv of these radiations (2) .…”

Section: Introductionmentioning

confidence: 99%

Measuring track density of alpha particles emitted from human teeth and assess of the resulting cancer risk

2021

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Background: Since the radionuclides concentration in teeth is a good indicator of the human body's radioactive contamination, the purpose of this study was to measure the track density of alpha particles emitted from the human teeth and to assess the resulting cancer risk. Material and Methods: In this cross-section study, 93 permanent and unfilled tooth samples were collected from the patients residing in Khorramabad, Iran, and visiting dental clinics in this city. The alpha track density for the tooth samples was measured using CR-39 nuclear track detector. Annual effective dose (AED) and excess lifetime cancer risk (ELCR) were estimated based on the recommendations made by ICRP and UNSCEAR. Results: The mean alpha track density from 222 Rn in patients' teeth was410.15 tracks cm -2 , whereas the mean for women and men equaled 441.42 and 378.20, respectively. This difference was not statistically significant (P=0.22), but there was a statistically significant difference between the track densities in different age groups (P˂0.001).In this study, the average radon activity concentration was 40.62 Bq m -3 . Also, the mean annual effective dose and the mean ELCR were calculated as 1.02 mSvy -1 and 3.59 ×10 -3 , respectively. Conclusion: The AED value was higher than the permissible dose limit and also the mean ELCR was higher than the global average. Based on the results, it is necessary to perform periodical monitoring to detect pollution sources.

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226Ra concentration in the teeth of habitants of areas with high level of natural radioactivity in Ramsar

Cited by 16 publications

References 10 publications

Radioactivity and radionuclides in deciduous teeth formed before the Fukushima-Daiichi Nuclear Power Plant accident

Radioactivity and radionuclides in deciduous teeth formed before the Fukushima-Daiichi Nuclear Power Plant accident

Radioactivity and radionuclides in deciduous teeth formed before the Fukushima-Daiichi Nuclear Power Plant accident

Measuring track density of alpha particles emitted from human teeth and assess of the resulting cancer risk

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