scholarly journals Evaluation of Maximum Mouth Opening, Masseter Muscle Activity and Temporomandibular Joint Noise before and after Sagittal Splitting Ramus Osteotomy.

1998 ◽  
Vol 8 (3) ◽  
pp. 222-228
Author(s):  
NOBUHIRO NOGUCHI ◽  
KOICHIRO IHARA ◽  
SADAYUKI NARITOMI ◽  
MASAAKI GOTO ◽  
TAKESHI KATSUKI
Keyword(s):  
Temporomandibular Joint ◽  
Muscle Activity ◽  
Masseter Muscle ◽  
Mouth Opening ◽  
Before And After

Effectiveness of Combining Manual Therapy and Acupuncture on Temporomandibular Joint Dysfunction: A Retrospective Study

2007 ◽  
Vol 35 (02) ◽  
pp. 203-208 ◽  
Author(s):  
Byung-Cheul Shin ◽  
Chung-Hyo Ha ◽  
Yung-Sun Song ◽  
Myeong Soo Lee
Keyword(s):  
Retrospective Study ◽  
Temporomandibular Joint ◽  
Manual Therapy ◽  
Randomized Clinical Trials ◽  
Combined Treatment ◽  
Mouth Opening ◽  
Temporomandibular Joint Dysfunction ◽  
Future Studies ◽  
Before And After ◽  
Maximal Mouth Opening

This retrospective study investigated the effects of combining manual therapy and acupuncture on the pain and maximal mouth opening (MMO), which were associated with temporomandibular joint dysfunction (TMD). The 49 TMD patients (15 men, 34 women; mean age = 30.47 years, SD = 13.52 years) were treated with a combination of acupuncture and manual therapy two or three times a week at the hospital. The pain and maximal mouth opening were assessed before and after 1 and 4 weeks of treatment. The combination therapy produced significant changes in pain levels ( p < 0.001) and mouth opening ( p < 0.001). All pairwise non-parametric comparison showed a significant improvement in pain ( p < 0.05 for all pairs) and MMO ( p < 0.05 for all pairs). These findings suggest that combining manual therapy and acupuncture decreases the pain level and increases the MMO of TMD patients. However, future studies should further investigate the efficacy of combined treatment on TMD with more rigorous randomized clinical trials.

scholarly journals The power features of Masseter muscle activity in tension-type and migraine without aura headache during open-close clench cycles

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3556 ◽  
Author(s):  
Behrouz Alizadeh Savareh ◽  
Ali Ghanjal ◽  
Azadeh Bashiri ◽  
Monireh Motaqhey ◽  
Boshra Hatef
Keyword(s):  
Muscle Activity ◽  
Masseter Muscle ◽  
Migraine Without Aura ◽  
Mouth Opening ◽  
Tension Type Headache ◽  
Emg Activity ◽  
Statistical Parameters ◽  
Signal Energy ◽  
Type Headache ◽  
Mean Variance

Introduction Different types of headaches and TMJ click influence the masseter muscle activity. The aim of this study was to assess the trend of energy level of the electromyography (EMG) activity of the masseter muscle during open-close clench cycles in migraine without aura (MOA) and tension-type headache (TTH) with or without TMJ click. Methods Twenty-five women with MOA and twenty four women with TTH participated in the study. They matched with 25 healthy subjects, in terms of class of occlusion and prevalence of temporomandibular joint (TMJ) with click. The EMG of both masseter muscles were recorded during open-close clench cycles at a rate of 80 cycles per minute for 15 seconds. The mouth opening was restricted to two centimeters by mandibular motion frame. Signal processing steps have been done on the EMG as: noise removing, smoothing, feature extraction, and statistical analyzing. The six statistical parameters of energy computed were mean, Variance, Skewness, Kurtosis, and first and second half energy over all signal energy. Results A three-way ANOVA indicated that during all the cycles, the mean of energy was more and there was a delay in showing the peak of energy in the masseter of the left side with clicked TMJ in MOA group compared to the two other groups, while this pattern occurred inversely in the side with no-clicked TMJ (P < 0.009). The variation of energy was significantly less in MOA group compared to the two other groups in the no-clicked TMJ (P < 0.003). However, the proportion of the first or second part of signal energy to all energy showed that TTH group had less energy in the first part and more energy in the second part in comparison to the two other groups (P < 0.05). Conclusion The study showed different changes in the energy distribution of masseter muscle activity during cycles in MOA and TTH. MOA, in contrast to TTH, had lateralization effect on EMG and interacted with TMJ click.

Statistical Methods and Artificial Neural Networks Techniques in Electromyography

2012 ◽  
Vol 1 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Ahmad Taher Azar ◽  
Valentina E. Balas
Keyword(s):  
Neural Network ◽  
Statistical Methods ◽  
Muscle Activity ◽  
Masseter Muscle ◽  
Discrete Wavelet ◽  
Neural Network Classifier ◽  
Denture Base ◽  
Feature Vectors ◽  
Significant Difference ◽  
Before And After

This work represents a comparative study for the activity of the masseter muscle for patients before trial base denture insertion and the activity of the same muscle after trial denture base insertion for both right and left masseter muscles. The study tried to find if there were significant differences in the activity of the masseter muscle before and after patients wearing their trial denture base using two approaches: parametric statistical methods and a Neural Network Classifier. Statistical analysis was performed on three feature vectors extracted from autoregressive (AR) modeling, Discrete Wavelet Transform (WT), and from Wavelet Packet Transform (WP). The least significant difference test and the student t-test have not proved significant differences in the masseter muscle activity before and after wearing denture. However, using the same feature vectors, a neural network classifier has proved that there are significant differences in the masseter muscle activity before and after patients wearing trial denture base.

scholarly journals Functional Changes of Temporomandibular Joint Mechanoreceptors Induced by Reduced Masseter Muscle Activity in Growing Rats

2009 ◽  
Vol 79 (5) ◽  
pp. 978-983 ◽  
Author(s):  
Takayoshi Ishida ◽  
Tadachika Yabushita ◽  
Kunimichi Soma
Keyword(s):  
Temporomandibular Joint ◽  
Muscle Activity ◽  
Masseter Muscle ◽  
Growth Period ◽  
Control Group ◽  
Functional Changes ◽  
Male Wistar Rats ◽  
Masseter Muscles ◽  
Experimental Group ◽  
Indirect Stimulation

Abstract Objective: To determine the influence of masseter muscle activity during growth on the functional characteristics of temporomandibular joint (TMJ) mechanoreceptors. Materials and Methods: Sixty-six 3-week-old male Wistar rats were divided into an experimental group, in which the masseter muscles were bilaterally resected at 3 weeks of age, and a control group. Single-unit activities of the TMJ mechanoreceptors were evoked by indirect stimulation of passive jaw movement. Electrophysiologic recordings of TMJ units were made at 5, 7, and 9 weeks of age. Results: During this period, the firing threshold of the TMJ units was significantly lower and the maximum instantaneous frequency of the TMJ units was significantly higher in the experimental group than in the control group. Conclusion: Reduced masseter activity during the growth period alters the response properties of TMJ mechanoreceptors.

scholarly journals Masseter Muscle Activity in Orthodontically Treated Patients with a History of Temporomandibular Joint Disorder: An Electromyographic Study

2021 ◽  
Vol 16 (2) ◽  
pp. 191-198
Author(s):  
Nisallina Apridini ◽  
Nia Ayu Ismaniati Noerhadi ◽  
Erwin Siregar
Keyword(s):  
Temporomandibular Joint ◽  
Muscle Activity ◽  
Masseter Muscle ◽  
Maximum Voluntary Contraction ◽  
Control Group ◽  
Temporomandibular Joint Disorder ◽  
Joint Disorder ◽  
History Of ◽  
Masseter Muscles ◽  
Semg Activity

The present study aimed to evaluate the surface electromyography (sEMG) activity of the masseter muscles in patients with a history of temporomandibular joint disorder (TMJD) who received orthodontic treatment. In total, 22 participants aged 18–35 years old were included in this study. They were divided into the control group (patients without a history of TMJD [n = 11]) and the test group (those with a history of TMJD [n = 11]). Each participant underwent sEMG of the right and left masseter muscles at 5-s maximum voluntary contraction (MVC). Results showed that the TMJD group had a lower sEMG activity of masseter muscles at MVC than the non-TMJD group. However, the differences were not statistically significant (p > 0.05, t-test). The Spearman’s correlation coefficient test revealed a weak negative correlation between muscle activity on sEMG and history of TMJD (p > 0.05). In conclusion, orthodontically treated patients in TMJD group have reduced masseter muscle activity during MVC, compare to the non-TMJD group.

scholarly journals Dry needling the masseter muscle in the treatment of myofascial pain: case reports

2017 ◽  
Vol 20 (3) ◽  
Author(s):  
Larissa De Oliveira Reis ◽  
Diego Azi De Oliveira ◽  
Isabela Maddalena Dias ◽  
Isabel Cristina Gonçalves Leite ◽  
Fabíola Pessoa Pereira Leite
Keyword(s):  
Temporomandibular Joint ◽  
Masseter Muscle ◽  
Myofascial Pain ◽  
Statistical Significance ◽  
Sample Size Calculation ◽  
Mouth Opening ◽  
Temporomandibular Joint Disorders ◽  
Dry Needling ◽  
Limited Mouth Opening ◽  
Axis I

<p>The aim of this study was to evaluate treatment with dry needling (AS) in the masseter muscle of patients diagnosed with myofascial pain as the pain symptoms and the mouth opening (AB). After sample size calculation, we selected 10 patients referred for treatment of temporomandibular disorders (TMD) diagnosed with MP, with or without limited mouth opening according to Axis I of the RDC/TMD, who underwent six DN sessions, once a week. Pain measurement using the Visual Analogue Scale (VAS) and an evaluation of the extent of mouth opening were done. All participants were female and the average age was 39.2 years, with 8 (80%) having a diagnosis of myofascial pain with limited mouth opening and 2 (20%) with only myofascial pain. Maximum unaided opening without pain before treatment was 31.9 mm and went to 36.2 mm, and the maximum unaided opening went from 39.6 mm to 43.1 mm. In both, however, could not find statistical significance (p&gt; 0.05). Regarding the mean weekly VAS value, this went from 8.3 before treatment to 2.3 a week later, with statistically significant results (p &lt; 0.05). In this study, the AS in the masseter muscle presented is a therapeutic alternative in the treatment of myofascial pain.</p><p> </p><p><strong>Keywords</strong></p><p>Temporomandibular joint; Temporomandibular Joint Disorders; Dry needling; Trigger points; Myofascial pain.</p>

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