Low-level laser on femoral growth plate in rats

Detalhes bibliográficos
Autor(a) principal: Oliveira,Sidney Piesco de
Data de Publicação: 2012
Outros Autores: Rahal,Sheila Canevese, Pereira,Elenize Jamas, Bersano,Paulo Ricardo de Oliveira, Vieira,Fabio de Almeida, Padovani,Carlos Roberto
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Acta Cirúrgica Brasileira (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502012000200004
Resumo: PURPOSE: To determine the influence of low-level laser therapy on femoral growth plate in rats. METHODS: Thirty male Wistar rats aged 40 days were divided into two groups, G1 and G2. In G1 the area of the distal growth plate of the right femur was irradiated at one point using GaAlAs laser 830 nm wavelength, output power of 40 mW, at an energy density of 10 J/cm². The irradiation was performed daily for a maximum of 21 days. The same procedure was done in G2, but the probe was turned off. Five animals in each group were euthanized on days 7, 14 and 21 and submitted to histomorphometric analysis. RESULTS: In both groups the growth plate was radiographically visible at all moments from both craniocaudal and mediolateral views. On the 21st day percentage of femoral longitudinal length was higher in G2 than G1 compared to basal value while hypertrophic zone chondrocyte numbers were higher in G1 than G2. Calcified cartilage zone was greater in G1 than in G2 at all evaluation moments. Angiogenesis was higher in G1 than in G2 at 14th and 21st days. CONCLUSION: The low-level laser therapy negatively influenced the distal femoral growth plate.
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spelling Low-level laser on femoral growth plate in ratsLasersBone DevelopmentChondrocytesLaser Therapy, Low-LevelRatsPURPOSE: To determine the influence of low-level laser therapy on femoral growth plate in rats. METHODS: Thirty male Wistar rats aged 40 days were divided into two groups, G1 and G2. In G1 the area of the distal growth plate of the right femur was irradiated at one point using GaAlAs laser 830 nm wavelength, output power of 40 mW, at an energy density of 10 J/cm². The irradiation was performed daily for a maximum of 21 days. The same procedure was done in G2, but the probe was turned off. Five animals in each group were euthanized on days 7, 14 and 21 and submitted to histomorphometric analysis. RESULTS: In both groups the growth plate was radiographically visible at all moments from both craniocaudal and mediolateral views. On the 21st day percentage of femoral longitudinal length was higher in G2 than G1 compared to basal value while hypertrophic zone chondrocyte numbers were higher in G1 than G2. Calcified cartilage zone was greater in G1 than in G2 at all evaluation moments. Angiogenesis was higher in G1 than in G2 at 14th and 21st days. CONCLUSION: The low-level laser therapy negatively influenced the distal femoral growth plate.Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia2012-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502012000200004Acta Cirúrgica Brasileira v.27 n.2 2012reponame:Acta Cirúrgica Brasileira (Online)instname:Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC)instacron:SBDPC10.1590/S0102-86502012000200004info:eu-repo/semantics/openAccessOliveira,Sidney Piesco deRahal,Sheila CanevesePereira,Elenize JamasBersano,Paulo Ricardo de OliveiraVieira,Fabio de AlmeidaPadovani,Carlos Robertoeng2012-02-27T00:00:00Zoai:scielo:S0102-86502012000200004Revistahttps://www.bvs-vet.org.br/vetindex/periodicos/acta-cirurgica-brasileira/https://old.scielo.br/oai/scielo-oai.php||sgolden@terra.com.br0102-86501678-2674opendoar:2012-02-27T00:00Acta Cirúrgica Brasileira (Online) - Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC)false
dc.title.none.fl_str_mv Low-level laser on femoral growth plate in rats
title Low-level laser on femoral growth plate in rats
spellingShingle Low-level laser on femoral growth plate in rats
Oliveira,Sidney Piesco de
Lasers
Bone Development
Chondrocytes
Laser Therapy, Low-Level
Rats
title_short Low-level laser on femoral growth plate in rats
title_full Low-level laser on femoral growth plate in rats
title_fullStr Low-level laser on femoral growth plate in rats
title_full_unstemmed Low-level laser on femoral growth plate in rats
title_sort Low-level laser on femoral growth plate in rats
author Oliveira,Sidney Piesco de
author_facet Oliveira,Sidney Piesco de
Rahal,Sheila Canevese
Pereira,Elenize Jamas
Bersano,Paulo Ricardo de Oliveira
Vieira,Fabio de Almeida
Padovani,Carlos Roberto
author_role author
author2 Rahal,Sheila Canevese
Pereira,Elenize Jamas
Bersano,Paulo Ricardo de Oliveira
Vieira,Fabio de Almeida
Padovani,Carlos Roberto
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Oliveira,Sidney Piesco de
Rahal,Sheila Canevese
Pereira,Elenize Jamas
Bersano,Paulo Ricardo de Oliveira
Vieira,Fabio de Almeida
Padovani,Carlos Roberto
dc.subject.por.fl_str_mv Lasers
Bone Development
Chondrocytes
Laser Therapy, Low-Level
Rats
topic Lasers
Bone Development
Chondrocytes
Laser Therapy, Low-Level
Rats
description PURPOSE: To determine the influence of low-level laser therapy on femoral growth plate in rats. METHODS: Thirty male Wistar rats aged 40 days were divided into two groups, G1 and G2. In G1 the area of the distal growth plate of the right femur was irradiated at one point using GaAlAs laser 830 nm wavelength, output power of 40 mW, at an energy density of 10 J/cm². The irradiation was performed daily for a maximum of 21 days. The same procedure was done in G2, but the probe was turned off. Five animals in each group were euthanized on days 7, 14 and 21 and submitted to histomorphometric analysis. RESULTS: In both groups the growth plate was radiographically visible at all moments from both craniocaudal and mediolateral views. On the 21st day percentage of femoral longitudinal length was higher in G2 than G1 compared to basal value while hypertrophic zone chondrocyte numbers were higher in G1 than G2. Calcified cartilage zone was greater in G1 than in G2 at all evaluation moments. Angiogenesis was higher in G1 than in G2 at 14th and 21st days. CONCLUSION: The low-level laser therapy negatively influenced the distal femoral growth plate.
publishDate 2012
dc.date.none.fl_str_mv 2012-02-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502012000200004
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502012000200004
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0102-86502012000200004
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia
publisher.none.fl_str_mv Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia
dc.source.none.fl_str_mv Acta Cirúrgica Brasileira v.27 n.2 2012
reponame:Acta Cirúrgica Brasileira (Online)
instname:Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC)
instacron:SBDPC
instname_str Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC)
instacron_str SBDPC
institution SBDPC
reponame_str Acta Cirúrgica Brasileira (Online)
collection Acta Cirúrgica Brasileira (Online)
repository.name.fl_str_mv Acta Cirúrgica Brasileira (Online) - Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia (SBDPC)
repository.mail.fl_str_mv ||sgolden@terra.com.br
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