Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/9798
Title: Influence of Laser therapy and muscle relaxant on the masseter muscle under occlusal wear an ultrastructural study
Authors: Lisboa, Marcio Vieira
Pinheiro, Antonio Luiz Barbosa
Santos, Marcos André Vannier dos
Baptista, Abrahão Fontes
Souza, Ana Paula Cavalcanti de
Valença Neto, Alberto de Aguiar Pires
Santos, Jean Nunes dos
Affilliation: Universidade Federal da Bahia. Faculdade de Odontologia. Centro de Biofotónica. Salvador, BA, Brasil
Universidade Federal da Bahia. Faculdade de Odontologia. Centro de Biofotónica. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Laboratório de Biomorfologia Parasitária. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Laboratório de Biomorfologia Parasitária. Salvador, BA, Brasil
Universidade Federal da Bahia. Faculdade de Odontologia. Centro de Biofotónica. Salvador, BA, Brasil
Universidade Federal da Bahia. Faculdade de Odontologia. Centro de Biofotónica. Salvador, BA, Brasil
Universidade Federal da Bahia. Faculdade de Odontologia. Centro de Biofotónica. Salvador, BA, Brasil
Abstract: 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 ofÊ 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)Ê andÊ 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
Keywords: Lasertherapy
Ultrastructure
Dental occlusion
Masseter muscle relaxant
Muscle relaxant
keywords: Terapia a Laser
Ultraestructura
Oclusão dental
Músculo masseter
Relaxante muscular
DeCS: Terapia a Laser
Oclusão dentária
Músculo Masseter
Ratos Wistar
Fármacos Neuromusculares
Issue Date: 2012
Publisher: Sociedad Chilena de Anatomía
Citation: LISBOA, M. V. Influence of laser therapy and muscle relaxant on the masseter muscle under occlusal wear: an ultrastructural study. International Journal of Morphology, v. 30, n. 3, p. 999-1006, 2012.
ISSN: 0717-9367
Copyright: open access
Appears in Collections:BA - IGM - Artigos de Periódicos

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