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Influence of different power outputs of intraoral Nd:YAG laser on shear bond strength of a resin cement to nickel–chromium dental alloy

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Abstract

Up to now, there is no any experience about the application of dental lasers to bond resin composites to metal surfaces in dentistry. The aim of this preliminary study was to evaluate if the laser irradiation of ceramic-covered alloy surface would improve the bond strength of resin to metal, and if different parameters of laser output may influence the strength of this bond. Fifty three cylinders (thickness of 5 mm and diameter of 10 mm) were made up of a commercially available nickel–chromium alloy by lost-wax technique. Forty prepared specimens were divided into four groups. Five specimens in each group were covered by slurry of dental opaque porcelain and irradiated by Nd:YAG laser using different output parameters for each group. Other five specimens in each group were treated using the same laser parameters without porcelain covering. Five sandblasted specimen served as control group. Panavia F2.0 was bonded on the metal surfaces using polyethylene tubes. In ceramic-coated specimens, silane was applied to achieve chemical bond between silica particles and resin cement. All specimens were thermocycled and subjected to shear bond strength (SBS) test (50 kgf at 0.5 mm/min). Two specimens of each ceramic-coated laser-treated groups were studied using scanning electron microscopy and wavelength dispersive X-ray spectroscopy which showed stabilization of silica particles on the metal surface. ANOVA procedure showed that although shear bond strength was significantly higher in porcelain-covered laser treated samples, but the effect of power output of laser irradiation was not significant (P = 0.917). There were no statistically significant difference between SBS in control samples and laser treated specimens without porcelain covering. It can be concluded that Nd:YAG laser surface treatment may improve the silica coating of alloy surface to achieve better resin–metal bond.

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Acknowledgments

This study was supported by a grant from the Vice Chancellor of Research of Mashhad University of Medical Sciences.

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Authors and Affiliations

  1. Department of Prosthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran

    Azam sadat Madani & Mohammad Reza Nakhaei

  2. Dental Materials Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Azadi Square, Vakilabad Highway, Mashhad, Iran

    Azam sadat Madani

  3. Department of Prosthodontics, Faculty of Dentistry, Hormozgan University of Medical Sciences, Imam Hossein Blvd., Bandar-Abbas, Iran

    Pedram Ansari Astaneh

  4. Laser Research Center in Dentistry (LRCD), Tehran University of Medical Sciences, Northern Kargar str., Hakim Highway, Tehran, Iran

    Sima Shahabi & Nasim Chiniforush

  5. Dental Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Azadi Square, Vakilabad Highway, Mashhad, Iran

    Mohammad Reza Nakhaei

  6. Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran

    Hossein Bagheri G.

  7. Department of Dental Materials, Faculty of Dentistry, Tehran University of Medical Sciences, Northern Kargar str., Hakim Highway, Tehran, Iran

    Hossein Bagheri G.

Authors
  1. Azam sadat Madani
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  2. Pedram Ansari Astaneh
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  3. Sima Shahabi
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  4. Mohammad Reza Nakhaei
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  5. Hossein Bagheri G.
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  6. Nasim Chiniforush
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Correspondence to Hossein Bagheri G..

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sadat Madani, A., Astaneh, P.A., Shahabi, S. et al. Influence of different power outputs of intraoral Nd:YAG laser on shear bond strength of a resin cement to nickel–chromium dental alloy. Lasers Med Sci 28, 229–234 (2013). https://doi.org/10.1007/s10103-012-1095-2

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  • DOI: https://doi.org/10.1007/s10103-012-1095-2

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