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Lasers in Medical Science

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15.02.2018 | Original Article

Effects of 915 nm laser irradiation on human osteoblasts: a preliminary in vitro study

verfasst von: Giovanni Mergoni, Paolo Vescovi, Silvana Belletti, Jacopo Uggeri, Samir Nammour, Rita Gatti

Erschienen in: Lasers in Medical Science | Ausgabe 6/2018

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Abstract

Photobiomodulation (PBM) is a non-invasive treatment that uses laser or led devices making its effects a response to light and not to heat. The possibility of accelerating dental implant osteointegration and orthodontic movements and the need to treat refractory bone lesions, such as bisphosphonate related osteonecrosis of the jaws, has led researchers to consider the effects of PBM on bone for dentistry purposes. The aim of our study was to investigate the effects of 915 nm light supplied with a GaAs diode laser on human osteoblasts in vitro. Osteoblasts were isolated from mandibular cortical bone of a young healthy donor. The irradiation parameters were as follows: doses = 5, 15 and 45 J/cm²; power densities = 0.12 and 1.25 W/cm²; and irradiation times = 41.7, 125 and 375 s. We performed one irradiation per day for 3 and 6 days to study proliferation and differentiation, respectively. Microscopic analysis showed a greater amount of bone nodules in samples treated with 5 J/cm² and 0.12 W/cm² compared to controls (56.00 ± 10.44 vs 19.67 ± 7.64, P = 0.0075). Cell growth and quantification of calcium deposition did not show any differences when comparing irradiated and non-irradiated samples. Photobiomodulation, with the parameters investigated in the present study, positively modulated the mineralization process in human osteoblasts, inducing the formation of a greater amount of bone nodules, but did not increase cell proliferation.

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Titel: Effects of 915 nm laser irradiation on human osteoblasts: a preliminary in vitro study
verfasst von: Giovanni Mergoni
Paolo Vescovi
Silvana Belletti
Jacopo Uggeri
Samir Nammour
Rita Gatti
Publikationsdatum: 15.02.2018
Verlag: Springer London
Erschienen in: Lasers in Medical Science / Ausgabe 6/2018
Print ISSN: 0268-8921
Elektronische ISSN: 1435-604X
DOI: https://doi.org/10.1007/s10103-018-2453-5

Springer Medizin

Abstract

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