Journal ArticleDOI
Influence of changing occlusal support on jaw-closing muscle electromyographic activity in healthy men and women.
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TLDR
Masseter and anterior temporalis muscles respond differently to changes in occlusal support, which may have implications for stability of the mandible during intense clenching.Abstract:
Objectives To test whether changes in occlusal support differentially modulate masseter and anterior temporalis muscle electromyographic (EMG) activity during controlled maximal voluntary clenching Material and methods Forty-seven healthy subjects (32 M and 15 F, 229±13 years) were recruited Cotton-rolls were used to modify the occlusal contact relations and were positioned on the right, left, or both sides, and either in the molar or premolar regions, ie six different occlusal combinations Surface EMG activity was recorded bilaterally from the masseter and anterior temporalis area and normalized with respect to maximal voluntary clenching in the intercuspal position Analysis of variance and the paired t-test were used to test the data Results Normalized EMG activity was influenced by changes in cotton-roll modified occlusal support, and there were differences between muscles (p<0001) In general, EMG activity decreased in both muscles when occlusal support was moved from the molar to the preread more
Citations
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Journal ArticleDOI
A possible biomechanical role of occlusal cusp-fossa contact relationships
Meiqing Wang,Noshir R. Mehta +1 more
TL;DR: Biomechanics in static and dynamic cusp-fossa relationships should be included to develop an understanding of Occlusal harmony which includes no interfering or deflective contacts in functional occlusal contact.
Journal ArticleDOI
Postural loads during walking after an imbalance of occlusion created with unilateral cotton rolls
TL;DR: In health subjects without TMD's symptoms, an experimentally induced imbalance of the occlusion, obtained through an unilateral cotton roll, is associated to detectable alterations in the distribution of loading on feet surface, during walking.
Journal ArticleDOI
Influence of sustained submaximal clenching fatigue test on electromyographic activity and maximum voluntary bite forces in healthy subjects and patients with temporomandibular disorders
TL;DR: The results suggest that, compared to healthy subjects, patients with TMD become more easily fatigued, but the electromyographic activation process during the fatigue test is similar between healthy subjects and patients withTMD.
Journal ArticleDOI
Stable tooth contacts in intercuspal occlusion makes for utilities of the jaw elevators during maximal voluntary clenching
TL;DR: The present results that a lower SEMG activity was associated with the largest number of occlusal contacts and the highest level of bite force during centric MVC demonstrated a complex integration of jaw-closing muscles when a stable occlusion is present.
Journal ArticleDOI
SEMG activity of jaw-closing muscles during biting with different unilateral occlusal supports
TL;DR: The results support that the masseter and anterior temporalis muscles have different roles in keeping the mandible in balance during unilateral maximal voluntary biting (MVB) in centric and eccentric position.
References
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Journal ArticleDOI
Electromyographic Heterogeneity in the Human Temporalis and Masseter Muscles during Dynamic Tasks Guided by Visual Feedback
TL;DR: In this paper, the authors examined the way the temporalis and masseter muscle regions are activated when free mandibular movements with various speeds and against various external leads are carried out guided by visual feedback.
Journal ArticleDOI
EMG response to alteration of tooth contacts on occlusal splints during maximal clenching.
W.W. Wood,David L. Tobias +1 more
TL;DR: Maximum clenching on an equilibrated occlusal splint yielded an increase of 17% in overall muscle activity over that of maximum intercuspation contributed mainly by masseter muscles.
Electromyographic heterogeneity in the human temporalis and masseter muscles.
TL;DR: A general finding was that, according to task, different regions were activated preferentially in the temporalis and masseter muscle regions, which points to a partitioning of the excitatory command of the motoneuron pool.
Journal ArticleDOI
Direction of a Bite Force Determines the Pattern of Activity in Jaw-closing Muscles
J.J. Mao,J.W. Osborn +1 more
TL;DR: It is concluded that the direction of a bite force, not its magnitude, determines the pattern of activity of jaw-closing muscles.
Journal ArticleDOI
Human masticatory muscle forces during static biting
TL;DR: Muscle forces during isometric biting appear to be consistent with objectives of MJL or MME, depending on the individual, biting location, and moment.