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Alterations in the stomatognathic system due to amyotrophic lateral sclerosis

OBJECTIVES: To compare the molar bite force, electromyographic activity, chewing efficiency and thickness of the masseter and temporalis muscles in individuals with amyotrophic lateral sclerosis (ALS) and healthy individuals. MATERIAL AND METHODS: Thirty individuals enrolled in the study were divide...

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Detalles Bibliográficos
Autores principales: Gonçalves, Lígia Maria Napolitano, Palinkas, Marcelo, Hallak, Jaime Eduardo Cecilio, Marques, Wilson, de Vasconcelos, Paulo Batista, Frota, Nicolly Parente Ribeiro, Regalo, Isabela Hallak, Siéssere, Selma, Regalo, Simone Cecilio Hallak
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Faculdade De Odontologia De Bauru - USP 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5963914/
https://www.ncbi.nlm.nih.gov/pubmed/29898176
http://dx.doi.org/10.1590/1678-7757-2017-0408
Descripción
Sumario:OBJECTIVES: To compare the molar bite force, electromyographic activity, chewing efficiency and thickness of the masseter and temporalis muscles in individuals with amyotrophic lateral sclerosis (ALS) and healthy individuals. MATERIAL AND METHODS: Thirty individuals enrolled in the study were divided into the study group (with ALS, n=15) and control group (healthy individuals, n=15). Data regarding molar bite force (right and left), electromyographic activity (mandibular rest, right and left laterality, protrusion, and maximum voluntary contraction), chewing efficiency (habitual and non-habitual), and masticatory muscle thickness (rest and maximum voluntary contraction) were tabulated and subjected to statistical analysis (Student’s t-test, p≤0.05). RESULTS: Comparisons between the groups demonstrated a statistically significant increase in the electromyographic activity of the right masseter (p=0.03) and left masseter (p=0.03) muscles during mandibular rest; left masseter (p=0.00), right temporalis (p=0.00), and left temporalis (p=0.03) muscles during protrusion; and right masseter (p=0.00), left masseter (p=0.00), and left temporalis (p=0.00) muscles during left laterality, in individuals with ALS as compared with healthy individuals. A statistically significant decrease was observed in the habitual chewing efficiency of the right masseter (p=0.00) and right temporalis (p=0.04) muscles in individuals with ALS. No statistically significant difference between the groups was found the masticatory muscle thickness and maximal molar bite force. CONCLUSIONS: ALS may lead to modifications in the activities of the stomatognathic system, including muscular hyperactivity and reduction in chewing efficiency; however, no change has been observed in the masticatory muscle thickness and molar bite force.