NDLI: Reassessment of Standardless Xrf and Pixe Analysis of Some Dental Materials Used in Endodontics and Orthodontics

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Reassessment of Standardless Xrf and Pixe Analysis of Some Dental Materials Used in Endodontics and Orthodontics

Content Provider	Semantic Scholar
Author	Perlea, Paula Suciu, Ioana Dimitriu, Bogdan Preoteasa, Elena Eugen, Avrigean Preoteasa Constantinescu, Bogdan Stan, Daniela Chiojdeanu, Catalina Gurban, Dan Scafeş, Adela Consuela Daina, Lucia
Copyright Year	2017
Abstract	A reassessment of our particle-induced X-ray emission (PIXE) and X-ray fluorescence (XRF) analysis of some materials used in endodontic and orthodontic dentistry is presented. The studied dental materials included Ca(OH)2 preparations as well as repair cements and sealers used in endodontics, and glass ionomer cements used in orthodontics. PIXE measurements were done with 3 MeV protons while XRF was performed with portable instruments. By lack of proper reference materials, the matrix effects associated with the thick target measurements and with the heterogeneous and granular structure of the samples could not be completely dealt with. Thus the analyzed relative concentrations were only approximate. A critical evaluation of results showed that XRF measurements were less accurate than PIXE. Therefore a correction procedure of XRF data based on PIXE data was applied. Thus for each element concentration a plausible interval was defined between the initial and the corrected XRF values. The present results may serve for the preparation of reference materials in view of highly accurate analysis. In addition XRF may detect qualitatively high levels of light elements by the relative intensity of Compton vs. Rayleigh scattering of X-rays. The data show highly variable elemental compositions in the endodontic and orthodontic materials under study, with no class-specific composition profile. In the analyzed dental materials, major elements with low Z appear to play various functional dental roles, while heavy major elements with high Z mainly enhance radio-opacity. Trace elements were probably impurities from raw materials. Further developments in dental research and possible forensic applications are suggested.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.nipne.ro/rjp/2017_62_9-10/RomJPhys.62.705.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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