These authors contributed equally to this study.
Strontium concentrations and isotope ratios in enamel of healthy and carious teeth in southern Shaanxi, China
Article first published online: 19 JUL 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Rapid Communications in Mass Spectrometry
Volume 27, Issue 17, pages 1919–1924, 15 September 2013
How to Cite
Li, Z., He, M., Peng, B. and Jin, Z. (2013), Strontium concentrations and isotope ratios in enamel of healthy and carious teeth in southern Shaanxi, China. Rapid Commun. Mass Spectrom., 27: 1919–1924. doi: 10.1002/rcm.6646
- Issue published online: 19 JUL 2013
- Article first published online: 19 JUL 2013
- Manuscript Accepted: 3 JUN 2013
- Manuscript Revised: 26 MAY 2013
- Manuscript Received: 20 FEB 2013
- National Natural Science Foundation of China. Grant Numbers: 41103008, 40976074
- State Key Laboratory of Loess and Quaternary Geology. Grant Number: SKLLQG1114
- Foundation of Institute of Earth Environment, Chinese Academy of Sciences. Grant Number: IEECAS 2012
As the trace element strontium (Sr) plays a significant role in dental health, it is important to determine the Sr concentration and isotope composition (87Sr/86Sr) of teeth and whether these values are related to caries formation, age and sex.
A total of 160 permanent teeth were collected from 7- to 79-year-old people from the southern Shaanxi area of China, including 100 healthy teeth and 60 carious teeth (men and women each accounted for half of the samples). The concentration and isotope composition of Sr elements in the dental enamel of the teeth were measured using inductively coupled plasma mass spectrometry (ICP-MS) and thermal ionization mass spectrometry (TIMS).
A significantly lower Sr concentration was found in the enamel of the carious teeth than in that of the healthy teeth for individuals of varying ages and sex. The Sr concentration in human carious teeth ranged between 79.70 µg/g and 85.80 µg/g; while the Sr concentration in healthy teeth ranged between 128 µg/g and 156.77 µg/g. Our results also demonstrated that the 87Sr/86Sr ratio did not appear to be affected by the caries formation, age or sex. The 87Sr/86Sr ratio in the enamel of the healthy and carious teeth of individuals of varying ages and genders ranged between 0.710935 and 0.711037, which falls into the range of 87Sr/86Sr ratios found in the local, naturally occurring water, soils and rocks.
Sr plays a significant role in dental health, and there is a negative correlation between Sr and the occurrence of dental caries. The 87Sr/86Sr ratio of teeth reflects the 87Sr/86Sr ratio of the associated environment, and there is no significant relationship with the frequency of dental caries, age or sex. Copyright © 2013 John Wiley & Sons, Ltd.