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The effect of Er:YAG laser irradiation on hydroxyapatite-coated implants and fluoride-modified TiO2-blasted implant surfaces: a microstructural analysis

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Abstract

The purpose of this study was to evaluate the microscopic changes and surface roughness on hydroxyapatite (HA)-coated implants following exposure to different powers and durations of Er:YAG laser irradiation in order to determine the proper pulse energy level and irradiation time. Ten HA-coated implants and ten fluoride-modified TiO2 implants were used. The implants were divided into a control (one implant) and test group (nine implants) for each implant type. Implants in the test groups were sub-divided into three groups (three implants per group) based on the applied laser pulse energy and irradiation time. The measurement of surface roughness was performed on all implants in the test groups using a white light interferometer before and after laser irradiation. R a values were recorded and compared in order to evaluate changes in surface roughness. For HA-coated implants, the R a values increased in all test groups after laser irradiation. However, mean R a values in the fluoride-modified TiO2-blasted implant test group were decreased after irradiation. There was no statistical difference. Scanning electron microscope analysis revealed surface alterations in both the HA-coated and fluoridated TiO2-blasted implants irradiated for 1.5 min at 100 mJ/pulse, 10 Hz. When the pulse energy and irradiation time increased, greater surface alterations, including surface flattening and microfractures, were observed. In conclusion, the results of the current study suggest that no changes could be observed in both HA-coated implants and fluoride-modified TiO2-blasted implants after irradiation at an intensity of 100 mJ/pulse, 10 Hz for 1 min performed to achieve surface detoxification.

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Disclosure of proprietary interests

We certify that we have no affiliation with or financial involvement in any organization or entity with a direct financial interest in the subject matter or materials discussed in this manuscript. We declare that we have no conflicts of interest, and the research described here was supported by our department’s own research funds.

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Authors and Affiliations

  1. Department of Periodontology, Institute of Oral Biology, School of Dentistry, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul, 130-701, Republic of Korea

    Seung-Il Shin, Young-Hyuk Kwon, Yeek Herr & Jong-Hyuk Chung

  2. Department of Periodontology, School of Dentistry, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul, 130-701, Republic of Korea

    Eun-Kwon Lee, Jeong-Hyun Kim, Ji-Hun Lee & Sun-Hee Kim

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  1. Seung-Il Shin
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  2. Eun-Kwon Lee
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Correspondence to Jong-Hyuk Chung.

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Shin, SI., Lee, EK., Kim, JH. et al. The effect of Er:YAG laser irradiation on hydroxyapatite-coated implants and fluoride-modified TiO2-blasted implant surfaces: a microstructural analysis. Lasers Med Sci 28, 823–831 (2013). https://doi.org/10.1007/s10103-012-1162-8

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  • DOI: https://doi.org/10.1007/s10103-012-1162-8

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