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Dentinal surface-cutting efficiency using a high-speed diamond bur, ultrasound and laser

  • Laser Methods in Chemistry, Biology, and Medicine
  • Published:
Laser Physics

Abstract

We compare an ultrasound bur with a conventional one and an Er:YAG laser for cavity preparations. Human molars were embedded in resin and sliced for this study. The surface abrasion was performed by a high-speed instrument and ultrasound. The cavity preparation was initially performed with a high-speed diamond bur. After this, a 2.94-μm laser with 400 mJ/pulse at 4 Hz, and a pulse width from 250–500 μs was applied to the tooth surface for 30 s in a sweeping motion. The samples were analyzed by SEM. The abrasion surface with a conventional bur showed structure removal with different grooves, a smear-layer presence, and occluded dentinal tubules. The abraded surface with the CVD bur suggested a removal process in layers. The laser-irradiated surface showed a rough aspect with opened tubules and the absence of a smear layer. The results of this study suggest that a high-speed diamond bur, ultrasound, and laser were able to perform cavity preparation. However, the CVD bur presented a higher surface quality.

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Authors and Affiliations

  1. Universidade Cruzeiro do Sul, São Paulo, Brazil

    M. Youssef & J. E. Pelizon Pelino

  2. Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil

    M. Youssef, A. Quinelato, F. Youssef & J. E. Pelizon Pelino

  3. Department of Prosthetic Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil

    M. Mori

  4. Institute of Physics, University of São Paulo, São Paulo, Brazil

    M. C. Salvadori

Authors
  1. M. Youssef
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  2. A. Quinelato
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  3. F. Youssef
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  4. J. E. Pelizon Pelino
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  5. M. C. Salvadori
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  6. M. Mori
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Correspondence to M. Youssef.

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Original Text © Astro, Ltd., 2008.

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Youssef, M., Quinelato, A., Youssef, F. et al. Dentinal surface-cutting efficiency using a high-speed diamond bur, ultrasound and laser. Laser Phys. 18, 472–477 (2008). https://doi.org/10.1134/S1054660X08040221

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  • DOI: https://doi.org/10.1134/S1054660X08040221

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