Influence of Laser Therapy and Muscle Relaxant on the Masseter Muscle under Occlusal Wear: An Ultrastructural Study

The aim of this study was to analyze the influence of low-intensity laser therapy and muscle relaxant in the characteristic ultra structural masseter muscle occlusal wear. Animals and Methods: 40 male Wistar rats were randomly divided into four groups: the control group (GI), occlusal wear (G-II), l...

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Autores principales:	Lisboa,Márcio Vieira, Pinheiro,Antônio Luiz Barbosa, dos Santos,Marcos André Vannier, Baptista,Abrahão Fontes, de Sousa,Ana Paula Cavalcanti, Pires Valença Neto,Alberto de Aguiar, dos Santos,Jean Nunes
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2012
Materias:	Lasertherapy Ultrastructure Dental occlusion Masseter muscle relaxant
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300038
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spelling	oai:scielo:S0717-950220120003000382013-02-20Influence of Laser Therapy and Muscle Relaxant on the Masseter Muscle under Occlusal Wear: An Ultrastructural StudyLisboa,Márcio VieiraPinheiro,Antônio Luiz Barbosados Santos,Marcos André VannierBaptista,Abrahão Fontesde Sousa,Ana Paula CavalcantiPires Valença Neto,Alberto de Aguiardos Santos,Jean Nunes Lasertherapy Ultrastructure Dental occlusion Masseter muscle relaxant The aim of this study was to analyze the influence of low-intensity laser therapy and muscle relaxant in the characteristic ultra structural masseter muscle occlusal wear. Animals and Methods: 40 male Wistar rats were randomly divided into four groups: the control group (GI), occlusal wear (G-II), laser occlusal wear (G-III), and the muscle relaxant occlusal wear (G-IV). Under general anesthesia given intraperitoneally, animals in groups II, III and IV had unilateral amputation of upper and lower molar cusps to simulate an occlusal wear situation. The masseter muscle G-III received laser therapy (830nm, 4J/cm2, 40mW, f ~ 2mm) and the procedure was subsequently repeated every other day for 14/30 days. G-IV animals were treated with daily injection of dantrolene ® (2.5 mg / kg in 0.5 ml of H2O). From 24 hours after the elimination peak. The animals were euthanized with an overdose of anesthesia on days 14 and 30 after the removal of the cusps and the ipsilateral masseter muscle was excised and divided in two, one half was routinely processed for light microscopy and other for electron microscopy. There was no statistical difference between each experimental group and the control and between periods in each experimental group. However, the muscle fibers in the G-II showed the most pronounced changes. There is no causal relationship between muscles fibers injuries and occlusion and, despite signs of muscular tissue injury were more evident in the occlusal wear group. Results indicates a moderate action of laser therapy and muscle relaxants in skeletal muscle.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.30 n.3 20122012-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300038en10.4067/S0717-95022012000300038
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Lasertherapy Ultrastructure Dental occlusion Masseter muscle relaxant
spellingShingle	Lasertherapy Ultrastructure Dental occlusion Masseter muscle relaxant Lisboa,Márcio Vieira Pinheiro,Antônio Luiz Barbosa dos Santos,Marcos André Vannier Baptista,Abrahão Fontes de Sousa,Ana Paula Cavalcanti Pires Valença Neto,Alberto de Aguiar dos Santos,Jean Nunes Influence of Laser Therapy and Muscle Relaxant on the Masseter Muscle under Occlusal Wear: An Ultrastructural Study
description	The aim of this study was to analyze the influence of low-intensity laser therapy and muscle relaxant in the characteristic ultra structural masseter muscle occlusal wear. Animals and Methods: 40 male Wistar rats were randomly divided into four groups: the control group (GI), occlusal wear (G-II), laser occlusal wear (G-III), and the muscle relaxant occlusal wear (G-IV). Under general anesthesia given intraperitoneally, animals in groups II, III and IV had unilateral amputation of upper and lower molar cusps to simulate an occlusal wear situation. The masseter muscle G-III received laser therapy (830nm, 4J/cm2, 40mW, f ~ 2mm) and the procedure was subsequently repeated every other day for 14/30 days. G-IV animals were treated with daily injection of dantrolene ® (2.5 mg / kg in 0.5 ml of H2O). From 24 hours after the elimination peak. The animals were euthanized with an overdose of anesthesia on days 14 and 30 after the removal of the cusps and the ipsilateral masseter muscle was excised and divided in two, one half was routinely processed for light microscopy and other for electron microscopy. There was no statistical difference between each experimental group and the control and between periods in each experimental group. However, the muscle fibers in the G-II showed the most pronounced changes. There is no causal relationship between muscles fibers injuries and occlusion and, despite signs of muscular tissue injury were more evident in the occlusal wear group. Results indicates a moderate action of laser therapy and muscle relaxants in skeletal muscle.
author	Lisboa,Márcio Vieira Pinheiro,Antônio Luiz Barbosa dos Santos,Marcos André Vannier Baptista,Abrahão Fontes de Sousa,Ana Paula Cavalcanti Pires Valença Neto,Alberto de Aguiar dos Santos,Jean Nunes
author_facet	Lisboa,Márcio Vieira Pinheiro,Antônio Luiz Barbosa dos Santos,Marcos André Vannier Baptista,Abrahão Fontes de Sousa,Ana Paula Cavalcanti Pires Valença Neto,Alberto de Aguiar dos Santos,Jean Nunes
author_sort	Lisboa,Márcio Vieira
title	Influence of Laser Therapy and Muscle Relaxant on the Masseter Muscle under Occlusal Wear: An Ultrastructural Study
title_short	Influence of Laser Therapy and Muscle Relaxant on the Masseter Muscle under Occlusal Wear: An Ultrastructural Study
title_full	Influence of Laser Therapy and Muscle Relaxant on the Masseter Muscle under Occlusal Wear: An Ultrastructural Study
title_fullStr	Influence of Laser Therapy and Muscle Relaxant on the Masseter Muscle under Occlusal Wear: An Ultrastructural Study
title_full_unstemmed	Influence of Laser Therapy and Muscle Relaxant on the Masseter Muscle under Occlusal Wear: An Ultrastructural Study
title_sort	influence of laser therapy and muscle relaxant on the masseter muscle under occlusal wear: an ultrastructural study
publisher	Sociedad Chilena de Anatomía
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300038
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Influence of Laser Therapy and Muscle Relaxant on the Masseter Muscle under Occlusal Wear: An Ultrastructural Study

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