Motricity of masticatory muscles in patients in treatment for obstructive sleep apnea with a mandibular advancement splint – pilot study

Motricity of masticatory muscles in patients in treatment for obstructive sleep apnea with a mandibular advancement splint – pilot study

Vol. 14 – Number 55 – 2021 Original article Page 82-86 Motricity of masticatory muscles in patients in treatment for obstructive sleep apnea with a mandibular advancement splint – pilot study Marilene de Oliveira Trindade¹ Jorge Machado Caram² Kivo de Souza Pessoa³ Abstract Co-activation of the genioglossus, lateral pterygoid and masseter muscle occurs after an episode of apnea to stabilize the mandible and prevent successive collapses. The use of a Mandibular Advancement Splint (MAS) is indicated to reposition the mandible and open the upper airways, allowing the air to pass freely. The aim of the present study was to evaluate the motricity of the masticatory muscles in patients using a MAS. Mandibular movements in ten patients with a diagnosis of obstructive sleep apnea (confirmed by polysomnography) were evaluated by electrognathography (model JT-3D, BioRESEARCH® BioPAK, SQUIB System of Brazil before and after six months of MAS use. The Shapiro-Wilk test was used to determine the normality of the data distribution. The data were expressed as mean and standard deviation as well as median and inter-quartile range (25th to 75th percentile). Either the paired Student’s t-test or Wilcoxon test was used for the comparisons, with the margin of error set to 5%. Significant reductions in mean closing and mean maximum opening of the mouth were found between the pre-intervention and post-intervention evaluations (p < 0.05). Regarding border movements, a significant difference was found in the number of cycles in a 20-second period (p < 0.05). Despite the little statistical evidence of changes, the findings suggest the occurrence of muscle adaptations of the stomatognathic system following treatment with a mandibular advancement splint. Descriptors: Apnea, sleep apnea syndromes, orthodontic appliances, functional. ¹ PhD, Associate Professor – UFPE. ² Doctoral student in Medicine – FMG. ³ PhD in Dentistry – UFPE. DOI: 10.24077/2021;1455-8286

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