Severity of Sleep Bruxism and its Implications for the Stomatognathic System in Healthy Subjects

Abstract

BACKGROUND: Sleep bruxism (SB) changes the functionality patterns of the stomatognathic system. However, its severity can be an aggravating factor in the function of this complex system.
 AIM: The purpose of the study was to investigate the stomatognathic system of healthy subjects with different severity of SB, as determined by BiteStrip.
 METHODS: Thirty-four subjects were divided into two groups: Mild SB (n = 15) and severe SB (n = 19). Electromyograph was used to evaluate the electromyographic activity of the right masseter (RM), left masseter (LM), right temporal (RT), and left temporal (LT) muscles at mandibular rest, right and left laterality, protrusion, and maximum voluntary contraction. Molar bite force was measured by the dynamometer. The data were tabulated and submitted for statistical analysis (p < 0.05).
 RESULTS: Molar bite force was significantly lower in the severe SB group. There was a significant increase in electromyographic activity in the severe SB group for the mandibular rest tasks (RM, RT, and LT), protrusion (RM, LM, RT, and LT), and right and left laterality in the temporalis muscles. There was a significant decrease in electromyographic activity in the severe SB group in maximum voluntary contraction for the masseter and temporalis muscles.
 CONCLUSION: Subjects with severe SB demonstrated greater functional impairment of the stomatognathic system, mainly affecting the electromyographic activity and molar bite force.

Gender-Related Biomechanical Properties of Masseter Muscle among Patients with Self-Assessment of Bruxism: A Comparative Study

“…The clinical symptoms characteristic of bruxism include the wearing of the teeth, painful tenderness of the masticatory muscles and TMJs, morning headaches, as well as fatigue and a feeling of tension in the stomatognathic system [8,10]. Moreover, bruxism may result in biomechanical complications associated with dental implants and implantsupported prostheses; however, the available evidence does not support adverse effects on other dental restorations or periodontitis [6].…”

Efeitos dos serviços assistidos por equinos no sistema imunológico, estomatognático e na capacidade funcional de adultos mais velhos: estudo longitudinal

“…A atividade mioelétrica pós-Programa foi estatisticamente menor para os músculos temporal esquerdo na mastigação de alimento macio. Isso é desejável, já que em indivíduos saudáveis há menor recrutamento de fibras musculares para realizar a mesma função mastigatória em comparação com indivíduos com alterações morfofuncionais que geram estresse e fadiga (PALINKAS et al, 2020). Resultado semelhante foi encontrado em estudo anterior com SAE (MELLO et al, 2020).…”