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Plasma for Bio-Decontamination, Medicine and Food Security pp 215–228Cite as

Non-thermal Atmospheric Plasma Treatment for Deactivation of Oral Bacteria and Improvement of Dental Composite Restoration

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Abstract

This paper reviews our recent research results of using non-thermal ­atmospheric plasmas for oral bacterial deactivation and for composite restoration improvement. Oral bacteria of Streptococcus mutans (S. mutans) and Lactobacillus acidophilus (L. acidophilus) with an initial bacterial population density between 1.0 × 108 and 5.0 × 108 cfu/ml were seeded on various media and their survivability with plasma exposure was examined. The plasma exposure time for a 99.9999% cell reduction was less than 15 s for S. mutans and within 5 min for L. acidophilus. To evaluate the dentin/composite interfacial bonding, extracted unerupted human third molars were used by removing the crowns and etching the exposed dentin surfaces with 35% phosphoric acid gel. After dental composite application and light curing, the teeth were then sectioned into micro-bars as the specimens for microtensile test. Student Newman Keuls (SNK) tests showed that the bonding strength of the composite restoration to peripheral dentin was significantly increased (by 64%) after 30 s plasma treatment of the dentin surfaces. These findings indicated that non-thermal atmospheric plasma technology is very promising for dental clinical applications.

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Acknowledgements

The research work was supported in part by US National Science Foundation (NSF) under contract of NSF-CBET-0730505 and US National Institute of Health (NIH) with grant numbers of 1R43DE019041-01 and 2R44DE019041-02.

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Authors and Affiliations

  1. Center for Surface Science and Plasma Technology, Department of Mechanical and Aerospace Engineering, University of Missouri, E2403D Lafferre Hall, Columbia, MO, 65211, USA

    Qing Song Yu, H. Li, A. C. Ritts & B. Yang

  2. Nanova Inc., Columbia, MO, 65203, USA

    M. Chen

  3. College of Dentistry, University of Tennessee, Memphis, TN, 38136, USA

    L. Hong

  4. School of Dentistry, University of Missouri–Kansas City, Kansas City, MO, 64108, USA

    C. Xu, X. Yao & Y. Wang

Authors
  1. Qing Song Yu
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  2. H. Li
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  3. A. C. Ritts
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  4. B. Yang
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  5. M. Chen
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  6. L. Hong
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  7. C. Xu
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  8. X. Yao
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  9. Y. Wang
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Corresponding author

Correspondence to Qing Song Yu .

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Editors and Affiliations

  1. , Faculty of Math., Phys. and Informatics, Comenius University, Mlynska Dolina, Bratislava, 84248, Slovakia

    Zdenko Machala

  2. , Faculty of Math., Phys. and Informatics, Comenius University, Mlynska Dolina, Bratislava, 84248, Slovakia

    Karol Hensel

  3. SRC RF Triniti, Pushkovykh 12, Troitsk, 142190, Russia

    Yuri Akishev

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© 2012 Springer Science+Business Media B.V.

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Yu, Q.S. et al. (2012). Non-thermal Atmospheric Plasma Treatment for Deactivation of Oral Bacteria and Improvement of Dental Composite Restoration. In: Machala, Z., Hensel, K., Akishev, Y. (eds) Plasma for Bio-Decontamination, Medicine and Food Security. NATO Science for Peace and Security Series A: Chemistry and Biology. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2852-3_17

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