Muscle Fatigue in the Temporal and Masseter Muscles in Patients with Temporomandibular Dysfunction

Woźniak, Krzysztof; Lipski, Mariusz; Lichota, Damian; Szyszka-Sommerfeld, Liliana

doi:10.1155/2015/269734

Cited by 34 publications

(33 citation statements)

References 26 publications

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“…The data obtained from the current study help to understand a possible trigeminal central mechanism involving persistent stimulation by the occlusion of the proprioception receptors of periodontal ligament, which ultimately has an impact on the contraction intensity of the jaw‐closing muscles through the periodontal–Vme–Vmo circuit. Although our data are from animals, they provide evidence that an aberrant occlusion may alter the function of the jaw‐closing muscle and be a factor in eliciting symptoms of temporomandibular disorders .…”

Section: Discussionmentioning

confidence: 97%

Proprioceptive mechanisms in occlusion‐stimulated masseter hypercontraction

Liu

Zhang

Wang

et al. 2017

European J Oral Sciences

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Neurons in the trigeminal mesencephalic nucleus (Vme) have an axon that branches peripherally to innervate the orofacial region and projects centrally to the trigeminal motor nucleus (Vmo). They function as the primary neurons conveying proprioceptive messages. The present study aimed to demonstrate the presence of a periodontal-Vme-Vmo circuit and to provide evidence for its involvement in an experimental unilateral anterior crossbite (UAC) model, which can induce osteoarthritis in the temporomandibular joint. Cholera toxin B subunit (CTb) was injected into the inferior alveolar nerve of rats to help identify the central axon terminals of Vme neurons in the Vmo. The levels of vesicular glutamate transporter 1 (VGLUT1) expressed in the periodontal region, Vme, Vmo, and masseter, and the level of acetylcholinesterase (AChE) expressed in the masseter, were assessed in UAC rats and controls. In CTb-treated rats, many CTb-labeled cell bodies and endings were identified in the Vme and in the Vmo, respectively. In UAC rats, VGLUT1 was expressed at a statistically significantly higher level in the periodontal ligament, Vme, Vmo, and masseter than it was in control rats. The level of AChE protein was 1.97 times higher in UAC rat masseter compared with control rat masseter. These findings reveal a trigeminal mechanism underlying masseter hyperactivity induced by an altered occlusion.

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Section: Discussionmentioning

confidence: 97%

Proprioceptive mechanisms in occlusion‐stimulated masseter hypercontraction

Liu

Zhang

Wang

et al. 2017

European J Oral Sciences

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“…The study regarding the influence of stressogenic professions on the degree of sleep bruxism manifestations was performed according to the criteria proposed by Nishimura [21]. We have applied questionnaires for the quantitative assessment of SB manifestations [22][23][24][25]: clinical questionnaire, Fonseca questionnaire, multifactorial questionnaire for bruxism associated pain, sleep quality questionnaire. For the quantitative assessment of the emotional subjective feelings, we have used the Visual Analogue Scale (VAS).…”

Section: Methodsmentioning

confidence: 99%

Manifestation of Sleep Bruxism According to the Age of Patients

Romaniuc¹,

Fala²,

Lacusta³

et al. 2018

EDUJ

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PhD, Univ. Prof., Academician d Neurology residentIntroduction: Bruxism is a widespread condition, affecting up to 85-90% of the general population, and in 5% of these individuals, the grinding evolves into a clinical condition. In many cases, sleep bruxism is latent, the disorder may be identified by its consequences (dental wear, etc.). This ascertains the need to develop diagnostic methods that may be able to identify bruxism at the initial stages of the disorder. Aim of the study: to determine the peculiarities of the clinical manifestation of primary sleep bruxism (SB) based on the age of the patients. Methodology: One hundred patients with primary SB (70 patients aged between 18-35 and 30 patients aged between 35-50) were investigated. The clinical features of SB (algic syndrome, myogenic disorders, temporomandibular disorders, dental wear, psychoemotional disorders, sleep quality alterations) were also investigated. Results: The expression of emotional stress in patients of various ages was almost identical. The highest clenching frequency and duration, as well as a higher clinical expression of sleep bruxism was observed in patients under 35. The components of the algic syndrome show a varied expression for different age groups -patients under 35 had more severe disorders of the nocturnal episodes and myogenic-spastic events; older patients (35-50) were characterized by a prevalence of local and diffuse myogenic structural disorders, arthrogenic pain and severe sleep disturbances. Conclusion: Electromyography and ultrasonography can reveal important morphofunctional peculiarities of the masticatory muscles that are associated with the severity of SB in patients from different age groups.

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“…The prevalence of temporomandibular disorder (TMD) is 27%‐38% of the examined adult population . Women showed higher prevalence of painful conditions than men, including both oro‐facial pain and other TMD symptoms . Subjects with TMD present more easily fatigued and less efficient masticatory muscles, with lower oxygen extraction capacity during mastication than healthy control subjects .…”

Section: Introductionmentioning

confidence: 99%

“…1 Women showed higher prevalence of painful conditions than men, including both oro-facial pain and other TMD symptoms. [2][3][4] Subjects with TMD present more easily fatigued and less efficient masticatory muscles, with lower oxygen extraction capacity during mastication than healthy control subjects. 5 Such condition leads to reduced supply of oxygen to the muscle that interferes with the contractile function.…”

Section: Introductionmentioning

confidence: 99%

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Effects of 8 weeks of masticatory muscles focused endurance exercises on women with oro‐facial pain and temporomandibular disorders: A placebo randomised controlled trial

Barbosa

Tahara

Ferreira

et al. 2019

J of Oral Rehabilitation

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Background Exercises are used to treat temporomandibular disorders (TMD), but they are often assessed with other therapies. Local endurance exercises may alter the resistance to fatigue and pain. Objective To assess the effects of an 8‐week protocol of local endurance exercises of masticatory muscles on muscle excitation, force response, perceived pain and over muscle efficiency. Design Randomised controlled trial. Setting Ambulatory care. Subjects In a placebo randomised controlled trial, 46 women with TMD and oro‐facial pain were randomised into intervention group and placebo group. The intervention group received a protocol of biting endurance exercises, controlled by biofeedback. The placebo group received a placebo (simulated laser therapy). Main Outcome Measures The primary outcomes were collected at baseline, 4 weeks and 8 weeks. Pain was assessed through visual analogue scale (VAS) and pressure pain thresholds (PPT). Bite force was collected by a load cell synchronised with surface electromyography of masticatory muscles, bilaterally. Results Pain scores decreased for both groups, but the intervention group showed lower values at 8 weeks. No differences were noted between groups for PPT, but the results increased for both overtime. Time until fatigue and muscle efficiency were higher in the intervention group vs placebo group in both within‐ and between‐subject analysis. Force increased from 4 to 8 weeks in the PG, without differences between groups. Temporal muscle excitation was higher on 8 weeks compared with baseline for the intervention group, without differences between groups. Conclusion Eight‐week exercise protocol of muscle endurance alleviates the pain and improves the resistance to fatigue and muscle efficiency in TMD subjects.

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Muscle Fatigue in the Temporal and Masseter Muscles in Patients with Temporomandibular Dysfunction

Cited by 34 publications

References 26 publications

Proprioceptive mechanisms in occlusion‐stimulated masseter hypercontraction

Proprioceptive mechanisms in occlusion‐stimulated masseter hypercontraction

Manifestation of Sleep Bruxism According to the Age of Patients

Effects of 8 weeks of masticatory muscles focused endurance exercises on women with oro‐facial pain and temporomandibular disorders: A placebo randomised controlled trial

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