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Effect of Nd:YAG laser parameters on the penetration depth of a representative Ni–Cr dental casting alloy

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Abstract

The effects of voltage and laser beam (spot) diameter on the penetration depth during laser beam welding in a representative nickel–chromium (Ni–Cr) dental alloy were the subject of this study. The cast alloy specimens were butted against each other and laser welded at their interface using various voltages (160–390 V) and spot diameters (0.2–1.8 mm) and a constant pulse duration of 10 ms. After welding, the laser beam penetration depths in the alloy were measured. The results were plotted and were statistically analyzed with a two-way ANOVA, employing voltage and spot diameter as the discriminating variables and using Holm–Sidak post hoc method (a = 0.05). The maximum penetration depth was 4.7 mm. The penetration depth increased as the spot diameter decreased at a fixed voltage and increased as the voltage increased at a fixed spot diameter. Varying the parameters of voltage and laser spot diameter significantly affected the depth of penetration of the dental cast Ni–Cr alloy. The penetration depth of laser-welded Ni–Cr dental alloys can be accurately adjusted based on the aforementioned results, leading to successfully joined/repaired dental restorations, saving manufacturing time, reducing final cost, and enhancing the longevity of dental prostheses.

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Acknowledgments

The authors would like to thank the Research Group Program for funding this research project. This study was funded by a research grant (# RGP-VPP-206) from the Research Group Program, Deanship of Scientific Research, King Saud University, Riyadh, Saudi Arabia.

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Authors and Affiliations

  1. Dental Biomaterials Research and Development Chair, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh, 11545, Saudi Arabia

    Youssef S. Al Jabbari, Theodoros Koutsoukis, Ehab A. El-Danaf, Raymond A. Fournelle & Spiros Zinelis

  2. Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia

    Youssef S. Al Jabbari

  3. Esthetic and Prosthesis, Dental Lab, Githiou 81 Str, Pireas, 18544, Greece

    Xanthoula Barmpagadaki

  4. Mechanical Engineering Department, King Saud University, Riyadh, Saudi Arabia

    Ehab A. El-Danaf

  5. Mechanical Engineering Department, College of Engineering, Marquette University, Milwaukee, WI, USA

    Raymond A. Fournelle

  6. Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece

    Theodoros Koutsoukis & Spiros Zinelis

Authors
  1. Youssef S. Al Jabbari
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  2. Theodoros Koutsoukis
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  3. Xanthoula Barmpagadaki
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  4. Ehab A. El-Danaf
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  5. Raymond A. Fournelle
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  6. Spiros Zinelis
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Corresponding author

Correspondence to Youssef S. Al Jabbari.

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Dedication

The paper is dedicated to the memory of Dimitris Mountoudis CDT, a dear friend of the third and last authors, who passed away suddenly at a young age in August 2011.

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Al Jabbari, Y.S., Koutsoukis, T., Barmpagadaki, X. et al. Effect of Nd:YAG laser parameters on the penetration depth of a representative Ni–Cr dental casting alloy. Lasers Med Sci 30, 909–914 (2015). https://doi.org/10.1007/s10103-013-1502-3

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  • DOI: https://doi.org/10.1007/s10103-013-1502-3

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