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The efficacy of the use of IR laser phototherapy associated to biphasic ceramic graft and guided bone regeneration on surgical fractures treated with wire osteosynthesis: a comparative laser fluorescence and Raman spectral study on rabbits

The aim of the present study was to assess, by Raman spectroscopy and laser fluorescence, the repair of surgical fractures fixed with wire osteosynthesis treated or not with infrared laser (λ780 nm, 50 mW, 4 × 4 J/cm 2  = 16 J/cm 2 , ϕ  = 0.5 cm 2 , CW) associated or not to the use of hydroxyapatite...

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Published in:Lasers in medical science 2013-05, Vol.28 (3), p.815-822
Main Authors: Pinheiro, Antônio Luiz Barbosa, Santos, Nicole Ribeiro Silva, Oliveira, Priscila Chagas, Aciole, Gilberth Tadeu Santos, Ramos, Thais Andrade, Gonzalez, Tayná Assunção, da Silva, Laís Nogueira, Barbosa, Artur Felipe Santos, Silveira, Landulfo
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cited_by cdi_FETCH-LOGICAL-c448t-3c45dc5a40f4a7c820e2d9bec2fe4f2d28955f3cf9e346176f4791b212368c123
cites cdi_FETCH-LOGICAL-c448t-3c45dc5a40f4a7c820e2d9bec2fe4f2d28955f3cf9e346176f4791b212368c123
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creator Pinheiro, Antônio Luiz Barbosa
Santos, Nicole Ribeiro Silva
Oliveira, Priscila Chagas
Aciole, Gilberth Tadeu Santos
Ramos, Thais Andrade
Gonzalez, Tayná Assunção
da Silva, Laís Nogueira
Barbosa, Artur Felipe Santos
Silveira, Landulfo
description The aim of the present study was to assess, by Raman spectroscopy and laser fluorescence, the repair of surgical fractures fixed with wire osteosynthesis treated or not with infrared laser (λ780 nm, 50 mW, 4 × 4 J/cm 2  = 16 J/cm 2 , ϕ  = 0.5 cm 2 , CW) associated or not to the use of hydroxyapatite and guided bone regeneration. Surgical tibial fractures were created under general anesthesia on 15 rabbits that were divided into five groups, maintained on individual cages, at day/night cycle, fed with solid laboratory pelted diet, and had water ad libitum. The fractures in groups II, III, IV, and V were fixed with wires. Animals in groups III and V were grafted with hydroxyapatite (HA) and guided bone regeneration (GBR) technique used. Animals in groups IV and V were irradiated at every other day during 2 weeks (4 × 4 J/cm 2 , 16 J/cm 2  = 112 J/cm 2 ). Observation time was that of 30 days. After animal death, specimens were taken and kept in liquid nitrogen and used for Raman spectroscopy. The Raman results showed basal readings of 1,234.38 ± 220. Groups WO + B + L showed higher readings (1,680.22 ± 822) and group WO + B the lowest (501.425 ± 328). Fluorescence data showed basal readings of 5.83333 ± 0.7. Groups WO showed higher readings (6.91667 ± 0.9) and group WO + B + L the lowest (1.66667 ± 0.5). There were significant differences between groups on both cases ( p  
doi_str_mv 10.1007/s10103-012-1166-4
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Surgical tibial fractures were created under general anesthesia on 15 rabbits that were divided into five groups, maintained on individual cages, at day/night cycle, fed with solid laboratory pelted diet, and had water ad libitum. The fractures in groups II, III, IV, and V were fixed with wires. Animals in groups III and V were grafted with hydroxyapatite (HA) and guided bone regeneration (GBR) technique used. Animals in groups IV and V were irradiated at every other day during 2 weeks (4 × 4 J/cm 2 , 16 J/cm 2  = 112 J/cm 2 ). Observation time was that of 30 days. After animal death, specimens were taken and kept in liquid nitrogen and used for Raman spectroscopy. The Raman results showed basal readings of 1,234.38 ± 220. Groups WO + B + L showed higher readings (1,680.22 ± 822) and group WO + B the lowest (501.425 ± 328). Fluorescence data showed basal readings of 5.83333 ± 0.7. Groups WO showed higher readings (6.91667 ± 0.9) and group WO + B + L the lowest (1.66667 ± 0.5). 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There were significant differences between groups on both cases ( p  &lt; 0.05). Pearson correlation was negative and significant ( R 2   = − 0.60 ; p   &lt;  0.001), and it was indicative that, when the Raman peaks of calcium hydroxyapatite (CHA) are increased, the level of fluorescence is reduced. 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Surgical tibial fractures were created under general anesthesia on 15 rabbits that were divided into five groups, maintained on individual cages, at day/night cycle, fed with solid laboratory pelted diet, and had water ad libitum. The fractures in groups II, III, IV, and V were fixed with wires. Animals in groups III and V were grafted with hydroxyapatite (HA) and guided bone regeneration (GBR) technique used. Animals in groups IV and V were irradiated at every other day during 2 weeks (4 × 4 J/cm 2 , 16 J/cm 2  = 112 J/cm 2 ). Observation time was that of 30 days. After animal death, specimens were taken and kept in liquid nitrogen and used for Raman spectroscopy. The Raman results showed basal readings of 1,234.38 ± 220. Groups WO + B + L showed higher readings (1,680.22 ± 822) and group WO + B the lowest (501.425 ± 328). Fluorescence data showed basal readings of 5.83333 ± 0.7. Groups WO showed higher readings (6.91667 ± 0.9) and group WO + B + L the lowest (1.66667 ± 0.5). There were significant differences between groups on both cases ( p  &lt; 0.05). Pearson correlation was negative and significant ( R 2   = − 0.60 ; p   &lt;  0.001), and it was indicative that, when the Raman peaks of calcium hydroxyapatite (CHA) are increased, the level of fluorescence is reduced. It is concluded that the use of near-infrared lasertherapy associated to HA graft and GBR was effective in improving bone healing on fractured bones as a result of the increasing deposition of CHA measured by Raman spectroscopy and decrease of the organic components as shown by the fluorescence readings.</abstract><cop>London</cop><pub>Springer-Verlag</pub><pmid>22833288</pmid><doi>10.1007/s10103-012-1166-4</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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identifier ISSN: 0268-8921
ispartof Lasers in medical science, 2013-05, Vol.28 (3), p.815-822
issn 0268-8921
1435-604X
language eng
recordid cdi_proquest_miscellaneous_1352294288
source Springer Nature
subjects Animals
Bone Substitutes
Bone Wires
Bones
Ceramics
Dentistry
Durapatite
Fluorescence
Fracture Fixation, Internal - methods
Fractures
Guided Tissue Regeneration - methods
Infrared Rays - therapeutic use
Lasers
Lasers, Semiconductor - therapeutic use
Light therapy
Low-Level Light Therapy - methods
Male
Medicine
Medicine & Public Health
Optical Devices
Optics
Original Article
Photonics
Quantum Optics
Rabbits
Spectrum Analysis, Raman
Tibial Fractures - radiotherapy
Tibial Fractures - surgery
title The efficacy of the use of IR laser phototherapy associated to biphasic ceramic graft and guided bone regeneration on surgical fractures treated with wire osteosynthesis: a comparative laser fluorescence and Raman spectral study on rabbits
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