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Mechanical properties of composite resins light-cured using a blue DPSS laser

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Abstract

Lasers have many favorable features as a light source owing to their monochromaticity and coherence. This study examined the mechanical properties of composite resins that were light-cured using a diode-pumped solid state (DPSS) laser. Eight composite resins were light-cured using four different light sources (one quartz–tungsten–halogen (QTH), two light-emitting diodes (LEDs), and one DPSS laser with a wavelength of 473 nm). The light intensity of the DPSS laser and remaining light-curing units were approximately 500 and 900 mW/cm2, respectively. The microhardness, flexural properties, and compressive properties were evaluated using the Vickers hardness test, three-point bending test, and compression test, respectively. In most cases, the microhardness, flexural properties, and compressive properties of the specimens light-cured using the DPSS laser were similar to those obtained using the other light-curing units. Within the limits of the study, the microhardness, flexural modulus, and compressive strength were linearly correlated with the filler content (in weight percent). The flexural modulus and compressive modulus were also linearly correlated with the microhardness. Even with a much lower light intensity, the DPSS laser with a wavelength of 473 nm can polymerize composite resins and give comparable mechanical properties to those obtained using the other light-curing units.

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Authors and Affiliations

  1. Department of Dental Materials, Medical Research Institute and School of Dentistry, Pusan National University, Yangsan, 626-870, South Korea

    Yong Hoon Kwon

  2. Department of Dental Materials, School of Dentistry, Pusan National University, Yangsan, 626-870, South Korea

    Du-Man Baek & Hyung-Il Kim

  3. Department of Operative Dentistry, School of Dentistry, Pusan National University, Yangsan, 626-870, South Korea

    Jeong-Kil Park & Sung-Ae Son

  4. Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA

    Ching-Chang Ko

  5. College of Dentistry, University of Tennessee, Memphis, TN, USA

    Franklin Garcia-Godoy

Authors
  1. Du-Man Baek
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  2. Jeong-Kil Park
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  3. Sung-Ae Son
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  4. Ching-Chang Ko
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  5. Franklin Garcia-Godoy
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  6. Hyung-Il Kim
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  7. Yong Hoon Kwon
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Correspondence to Yong Hoon Kwon.

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Baek, DM., Park, JK., Son, SA. et al. Mechanical properties of composite resins light-cured using a blue DPSS laser. Lasers Med Sci 28, 597–604 (2013). https://doi.org/10.1007/s10103-012-1117-0

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  • DOI: https://doi.org/10.1007/s10103-012-1117-0

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