scholarly journals Electromyographic Analysis of Masseter Muscle after Surgical Correction of Mandibular Prognathism

2012 ◽  
Vol 3 (3) ◽  
pp. 121-124 ◽  
Author(s):  
Majid Eshghpour ◽  
Seyed Amir Danesh-Sani
Keyword(s):  
Masseter Muscle ◽  
Initial Phase ◽  
Surgical Correction ◽  
Electromyographic Activity ◽  
Preoperative Level ◽  
Sagittal Split Ramus Osteotomy ◽  
Mandibular Prognathism ◽  
Before And After ◽  
Safe Technique ◽  
Electromyographic Analysis

ABSTRACT Sagittal split ramus osteotomy (SSRO) is commonly used for treatment of mandibular prognathism. This study evaluated masseter muscle activity using electromyography device, in patients with mandibular prognathism before and after bilateral SSRO of the mandible. Twelve prognathic patients (five males and seven females; mean age 20.6 years) were examined. Initial phase of orthodontic treatment was completed in all included patients. Electromyographic activity of masseter muscle was recorded during maximum voluntary clenching as follows: First evaluation: 7 days prior to surgery, second evaluation: 3 months after surgery and third evaluation: 6 months after surgery. Electro-myography quantities were significantly decreased 3 months after surgery. Electromyographic activity of masseter muscle was recovered to the preoperative level 6 months after bilateral SSRO of the mandible. SSRO of the mandible is a safe technique for correction of mandibular prognathism and not seriously affects masticatory muscle electromyographic activity. How to cite this article Eshghpour M, Danesh Sani SA. Electromyographic Analysis of Masseter Muscle after Surgical Correction of Mandibular Prognathism. Int J Head and Neck Surg 2012;3(3):121-124.

scholarly journals Rapid maxillary expansion in the treatment of the functional posterior crossbite: joint noise and electromyographic activity analysis

2019 ◽  
Vol 48 ◽  
Author(s):  
Diego Jesus Brandariz PIMENTEL ◽  
Laís Valencise MAGRI ◽  
Melissa de Oliveira MELCHIOR ◽  
Guido Artemio MARAÑÓN-VÁSQUEZ ◽  
Mirian Aiko Nakane MATSUMOTO ◽  
...  
Keyword(s):  
Masticatory Muscles ◽  
Rapid Maxillary Expansion ◽  
Electromyographic Activity ◽  
Maxillary Expansion ◽  
Posterior Crossbite ◽  
Stomatognathic System ◽  
End Of Treatment ◽  
Before And After ◽  
Electromyographic Analysis ◽  
Level Of Significance

Abstract Introduction The rapid maxillary expansion (RME) reduces the risk of developing structural and functional disorders in the stomatognathic system. Objective To examine the effects of the RME as a treatment for the posterior crossbite, related with the electromyographic activity of the masticatory muscles and the TMJ noises in a population of children. Material and method 13 girls and 7 boys, regardless of the type of malocclusion, with a mean age of 9 years old (± 3), were treated with RME. The electrovibratography analyzed the TMJ noise, and the electromyography analyzed the masticatory muscles before treatment (T0) and after three months of a short-term follow-up (T1). The comparisons of the affected and unaffected sides by the crossbite were performed using Mann-Whitney’s test, and to compare data before and after treatment the Wilcoxon’s test was used (level of significance: 5%). Result No significant differences were found in the parameters of joint noise in comparison to the sides affected and unaffected by the crossbite, in both T0 and T1 (p>0.05); only the side without the crossbite observed decrease in the peak amplitude of the joint noises after treatment. In the static electromyographic analysis, inter-side differences were observed before and after treatment, since the deliberate unilateral chewing showed greater asymmetry activity in T0 for both sides, which has been corrected after treatment, improving the functional chewing. Conclusion The proposed treatment did not lead to the occurrence of joint noises and improved the functional pattern of electromyographic activity during chewing at the end of treatment.

scholarly journals Stomathognatic system function in indigenous people from Brazilian Xingu villages: An electromyographic analysis

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243495
Author(s):  
Carla Moreto Santos ◽  
Marcelo Palinkas ◽  
Wilson Mestriner-Júnior ◽  
Isabela Hallak Regalo ◽  
Paulo Batista de Vasconcelos ◽  
...  
Keyword(s):  
Postural Balance ◽  
Masseter Muscle ◽  
Masticatory Muscles ◽  
Electromyographic Activity ◽  
System Function ◽  
Masticatory Efficiency ◽  
Indigenous Group ◽  
Electromyographic Analysis ◽  
Student’S T ◽  
Student’S T Test

The maintenance of postural balance can be influenced by the lifestyle of a population. This study aimed to determine the electromyographic activity of the masseter and temporalis muscles during mandibular tasks and habitual and non-habitual chewing in indigenous individuals to reveal the differences among white Brazilian individuals. Sixty Brazilians (18 and 28 years) were divided into two groups: 30 Xingu indigenous individuals and 30 white Brazilian individuals, with 20 men and 10 women in each group. The individuals were assessed using the normalized electromyographic activity of mandibular tasks (rest, protrusion, right and left laterality) and electromyographic activity of masticatory cycles in habitual (peanuts and raisins) and non-habitual (Parafilm M) chewing. Data were analyzed using Student’s t-test (p < .05). Comparisons between the groups demonstrated significant differences. Indigenous individuals group presented a decrease in the normalized electromyographic activity of the masticatory muscles during mandibular rest [right masseter (p = .002) and left masseter (p = .004) muscles]. There was increase in the normalized electromyographic activity during protrusion [left temporal (p = .03) muscle]. There was increase in the electromyographic activity during chewing: peanuts [right masseter (p = .001), left masseter (p = .001) and right temporal (p = .01) muscles], raisins [right masseter (p = .001), left masseter (p = .002), right temporal (p = .008), left temporal (p = .01) muscles] and Parafilm M [left masseter muscle (p = .05)]. From the findings of this study, we concluded that in the comparison between indigenous and white individuals, positive changes were observed in the electromyographic pattern of the masticatory muscles in the mandibular postural conditions, with greater masticatory efficiency in the indigenous group.

Bite forces before and after surgical correction of mandibular prognathism

1996 ◽  
Vol 54 (2) ◽  
pp. 176-181 ◽  
Author(s):  
Edward Ellis ◽  
Gaylord S Throckmorton ◽  
Douglas P Sinn
Keyword(s):  
Surgical Correction ◽  
Mandibular Prognathism ◽  
Before And After

scholarly journals Orofacial myofunctional changes and electromyographic activity of the orbicularis oris muscle in trombonists

Revista CEFAC ◽  
2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Ana Paula Arruda de Moura ◽  
Jully Anne Soares de Lima ◽  
Eduarda de Lima Amarante ◽  
Larissa Nadjara Alves Almeida ◽  
Luciane Spinelli de Figueirêdo Pessoa ◽  
...  
Keyword(s):  
Electrical Activity ◽  
Cross Sectional Study ◽  
Electromyographic Activity ◽  
Cross Sectional ◽  
Before And After ◽  
Orbicularis Oris Muscle ◽  
The Mean ◽  
Electromyographic Analysis ◽  
Student’S T ◽  
Student’S T Test

ABSTRACT Objective: to analyze whether trombonists present orofacial myofunctional changes and compare the electrical activity of the orbicularis oris muscle before and after playing their instrument. Methods: an observational, descriptive, and cross-sectional study. The sample consisted of 20 university trombonists. Data collection involved three steps: application of a questionnaire investigating some peculiarities of trombonists (Orofacial Myofunctional Evaluation with Expanded Scores - OMES-E), and electromyographic analysis of the orbicularis oris muscle before and after performing a piece with the trombone. The mean, standard deviation, frequency, and percentage were calculated, and the paired Student’s t test was used to compare the means of the electromyographic records before and after playing the trombone, at a 5% significance. Results: seventy per cent of trombonists reported some symptom of orofacial myofunctional alteration, namely, muscle compensations, tension, and pain. The myofunctional evaluation showed a mild change in cheek volume (90%) and labial commissure asymmetry (60%). The electrical activity of the lower orbicularis oris muscle decreased significantly after the trombone practice (p = 0.04), while that of the superior orbicularis oris muscle remained unchanged. Conclusion:trombonists show clinical and self-reported oromyofunctional changes as well as decreased electrical activity of the lower orbicularis oris muscle, after playing the trombone.

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