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Teeth characterization using ion beam analysis |
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| Authors: | M A Rizzutto N Added M H Tabacniks F Falla-Sotelo J F Curado C Francci R A Markarian A Quinelato F Youssef M Mori M Youssef |
| Institution: | 28601. Universidade de S?o Paulo, Instituto de Física, Rua do Mat?o Travessa R 187, 05508-900, S?o Paulo, SP, Brazil 28602. Universidade de S?o Paulo, Instituto de Física, Rua do Mat?o Travessa R 187, 05508-900, S?o Paulo, SP, Brazil 28603. Universidade de S?o Paulo, Instituto de Física, Rua do Mat?o Travessa R 187, 05508-900, S?o Paulo, SP, Brazil 28604. Universidade de S?o Paulo, Instituto de Física, Rua do Mat?o Travessa R 187, 05508-900, S?o Paulo, SP, Brazil 28605. Universidade de S?o Paulo, Instituto de Física, Rua do Mat?o Travessa R 187, 05508-900, S?o Paulo, SP, Brazil 28606. Universidade de S?o Paulo, Faculdade de Odontologia, Av. Prof Lineu Prestes, 222, 05508-900, S?o Paulo, SP, Brazil 28607. Universidade de S?o Paulo, Faculdade de Odontologia, Av. Prof Lineu Prestes, 222, 05508-900, S?o Paulo, SP, Brazil 28608. Universidade de S?o Paulo, Faculdade de Odontologia, Av. Prof Lineu Prestes, 222, 05508-900, S?o Paulo, SP, Brazil 28609. Universidade de S?o Paulo, Faculdade de Odontologia, Av. Prof Lineu Prestes, 222, 05508-900, S?o Paulo, SP, Brazil 286010. Universidade de S?o Paulo, Faculdade de Odontologia, Av. Prof Lineu Prestes, 222, 05508-900, S?o Paulo, SP, Brazil 286011. Universidade de S?o Paulo, Faculdade de Odontologia, Av. Prof Lineu Prestes, 222, 05508-900, S?o Paulo, SP, Brazil |
| Abstract: | Summary A collaboration project between the School of Dentistry and the Institute of Physics of the University of S?o Paulo has been established to measure elemental concentrations in teeth by proton induced X-ray emission (PIXE) and heavy ion elastic recoil detection analysis (HI-ERDA) techniques. Data on trace elements in human, bovine and swine teeth, analyzed by PIXE with a 2.4 MeV proton beam, were compared and concentrations for several elements were obtained with tens of mg/g sensitivity. HI-ERDA measurements employing a 52 MeV Cl beam were done to evaluate changes in elementary concentration in dental enamel after bleaching treatment with different products in 25 bovine incisors teeth. This non-destructive technique allowed the measurements of Ca, P, O and C concentrations above the limit of 100 mg/g. |
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