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01-03-2010 | Original Article

Effects of low-level laser therapy on bone formed after distraction osteogenesis

Authors: Roberto Hübler, Eduardo Blando, Lêonilson Gaião, Paulo Eduardo Kreisner, Letícia Kirst Post, Cristina Braga Xavier, Marília Gerhardt de Oliveira

Published in: Lasers in Medical Science | Issue 2/2010

Abstract

This study evaluated the effect of low-level laser therapy (LLLT) on the chemical composition, crystallinity and crystalline structure of bone at the site of distraction osteogenesis. Five rabbits were subjected to distraction osteogenesis (latency = 3 days; rate and frequency = 0.7 mm/day for 7 days; consolidation = 10 days), and three were given LLLT with arsenide–gallium–aluminum (AsGaAl; 830 nm, 40 mW): 10 J/cm² dose per spot, applied directly to the distraction osteogenesis site during the consolidation stage at 48 h intervals. Samples were harvested at the end of the consolidation stage. X-ray fluorescence and X-ray diffraction were used to analyze chemical composition, crystallinity and crystalline structure of bone at the distraction osteogenesis site. The analysis of chemical composition and calcium (Ca) and phosphorus (P) ratios revealed greater mineralization in the LLLT group. Diffractograms showed that the crystalline structure of the samples was similar to that of hydroxyapatites. Crystallinity percentages were greater in rabbits that were given LLLT. Crystallinity (41.14% to 54.57%) and the chemical composition of the bone at the distraction osteogenesis site were similar to the that of the control group (42.37% to 49.29%). The results showed that LLLT had a positive effect on the biomodulation of newly formed bone.

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Title: Effects of low-level laser therapy on bone formed after distraction osteogenesis
Authors: Roberto Hübler
Eduardo Blando
Lêonilson Gaião
Paulo Eduardo Kreisner
Letícia Kirst Post
Cristina Braga Xavier
Marília Gerhardt de Oliveira
Publication date: 01-03-2010
Publisher: Springer-Verlag
Published in: Lasers in Medical Science / Issue 2/2010
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI: https://doi.org/10.1007/s10103-009-0691-2

2024 ASCO Annual Meeting

Springer Medicine

Effects of low-level laser therapy on bone formed after distraction osteogenesis

Abstract

2024 ASCO Annual Meeting

Springer Medicine

Abstract

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