scholarly journals Порівняльний аналіз електроміографічної активності жувальних м’язів у осіб з ортодонтичною патологією та осіб з ортогнатичним прикусом

2016 ◽  
Author(s):  
Yu. M. Martits ◽  
I. R. Plavutska
Keyword(s):  
Functional Analysis ◽  
Orthodontic Treatment ◽  
Masticatory Muscles ◽  
Electromyographic Activity ◽  
Front Part ◽  
Functional Disorders ◽  
Average Amplitude ◽  
Bioelectric Activity ◽  
Amplitude Parameter ◽  
The Right

The analysis of bioelectric activity of masticatory muscles, as well as such characteristics as their symmetry and synergy is recommended to determine the degree of functional disorders of these muscles. The objective: to conduct a comparative analysis of electromyographic activity of masticatory muscles in patients with orthodontic disorders and those with orthognatic bite. The materials and methods: a total superficial electromyography of m. Masseter and the front part of the m. Temporalis in 87 people with the presence of orthodontic pathology and 22 persons with orthognatic bite at compression on teeth and cotton rolls. The results: it is determined the reduction of the average amplitude parameter of the same name muscles and ratio indexes of the average amplitude of the muscles of the right and left side at compression on rolls compared to the compression on teeth in both observed groups. Statistically significant differences form. Masseter were not found when comparing the coefficient of the same name muscles coordination between the groups, as opposed to the following measures for m. Temporalis (p<0,05). Conclusion: The condition of occlusion appears on the EMG results, which have been confirmed by us in this study. At orthodontic pathology the EMG results should be evaluated together with the results of other studies (the diagnostics of TMD, clinical functional analysis, TMJ study). It is necessary to conduct further research in this area in order to highlight and explain some causes of the appearance of masticatory muscles asymmetry, its connection with orthodontic pathology, its impact on the course of the disease and the results of orthodontic treatment.

scholarly journals Experience of using an integrated approach in the diagnosis of temporomandibular joint dysfunction

2022 ◽  
pp. 98-100
Author(s):  
A. A. Sultanov ◽  
Y. Y. Pervov ◽  
A. K. Yatsenko ◽  
M. A. Sultanova ◽  
D. O. Drozdova
Keyword(s):  
Physical Examination ◽  
Temporomandibular Joint ◽  
Orthodontic Treatment ◽  
Clinical Case ◽  
Mouth Opening ◽  
Integrated Approach ◽  
Masticatory Muscles ◽  
Temporomandibular Joint Dysfunction ◽  
The Right ◽  
Masseter Muscles

The article presents a clinical case of the diagnostics and treatment of the temporomandibular joint dysfunction (TMJ) in patient after orthodontic treatment. The hypertonia of masticatory muscles, limit of mouth opening and deviation of the jawbone to the right were observed during physical examination. Adhesion of the disk to the articular tubercle of the right temporal bone was detected on MRI. Hyperrotation of the articular head and the deviation of the jawbone to the right were observed on the charts during axiography. Disappearing of the feeling of heaviness in the right TMJ, free mouth opening, absence of deviation symptom, and the reduction of the rigidity of the masseter muscles were observed on the basis of diagnostic examinations after treatment. Presented clinical experience lets us make a conclusion that it is necessary to prescribe taking axiography and MRI during diagnosing and treating temporomandibular joint dysfunction.

scholarly journals Effect of manual therapy on pain and electromyographic activity of masticatory muscles in patients with temporomandibular disorders

2020 ◽  
pp. 1-7
Author(s):  
Priscila Bageston de Britto ◽  
Maurício André Bisi ◽  
William Dhein
Keyword(s):  
Manual Therapy ◽  
Temporomandibular Disorders ◽  
Masticatory Muscles ◽  
Emg Activity ◽  
Electromyographic Activity ◽  
Pain Level ◽  
Joint Mobilization ◽  
Factorial Anova ◽  
Quasi Experimental ◽  
The Right

Background: Temporomandibular disorders (TMD) are disorders of multifactorial origin that affect the temporomandibular joint and/or masticatory muscles. The TMD can generate compensations where physical therapy acts through myofascial releases and joint mobilizations to restore functionality. Objective: To verify the effects of manual therapy techniques on pain and electromyographic activity (EMG) of masticatory muscles in TMD patients. Methods: This is a quasi-experimental study composed of 10 subjects with TMD and 10 healthy subjects who underwent a session of myofascial release, joint mobilization and digit-pressure on the masticatory and cervical muscles. Pain levels and electromyographic activities of the temporal and masseter muscles were bilaterally assessed during the following situations: (1) Maximum Occlusion and (2) Chewing in the right and the left side with chewing gum. Data analysis was performed using BIOMEC-SAS software, in which the data were filtered with a 4th order Butterworth bandpass filter with 20-400hz and normalized as a percentage of maximum occlusion. Data were divided into homolateral and contralateral muscles alongside chewing. EMG variables were compared by factorial ANOVA, and pain by dependent t-test. Results: TMD patients had pain level reduction during maximum occlusion (Pre:4.55±2.2; Post:2.55±1.6; p=<0.001), right chewing (Pre:2.3±2.16; Post:0.4±0.69; p = 0.02) and left chewing (Pre: 1.0±1.15; Post:0.10±0.31; p = 0.05). There was no effect of manual therapy techniques on the EMG activity bilaterally of the temporal (p = 0.617) and masseter (p = 0.926) muscles during chewing. Patients with TMD had higher EMG activities during chewing on the homolateral temporal (p = 0.001) and masseter (0.004) muscles compared to subjects without injury. Conclusion: Manual therapy techniques reduced pain level in TMD patients. No changes in EMG activity were observed after manual therapy techniques. Finally, the study provides evidence of the influence of manual therapy techniques on short-term pain.

scholarly journals Results of orthodontic treatment of a child with asymmetrical micrognathia and the congenital mandibular condylar hyperplasia

2021 ◽  
Vol 102 (1) ◽  
pp. 92-99
Author(s):  
F S Ayupova ◽  
R A Khotko ◽  
E L Vinichenko ◽  
V N Lovlin
Keyword(s):  
Computed Tomography ◽  
Orthodontic Treatment ◽  
Permanent Dentition ◽  
Mixed Dentition ◽  
Functional Disorders ◽  
Facial Aesthetics ◽  
Condylar Hyperplasia ◽  
Comprehensive Rehabilitation ◽  
The Right ◽  
Distal Occlusion

Aim. To analyze the results of orthodontic treatment of a child with asymmetrical micrognathia and mandiblar condylar hyperplasia. Methods. The configuration of a face in the photos was evaluated and diagnostic models of the jaws were analyzed by using the Ponts and Korkhaus methods in treatment dynamics. The physiological status of bone tissue, temporomandibular joints and teeth was studied by using orthopantomography and computed tomography. Functional disorders were detected by using special tests, including EschlerBittner's test and Ilyina-Markosyans test. Orthodontic treatment and stimulation of mandibular growth in the mixed dentition stage were undertaken with the single jaw removable appliances and the appliance improved by us for correction of the distal occlusion. The Damon Q bracket system with archwires was used in permanent dentition period. Results. The child's convex facial profile was typical for distal occlusion and micrognathia. The facial asymmetry, increasing with mouth opening, and a decrease in mandibular range of motion indicated lesion of the right temporomandibular joint. The right condyle was enlarged on the orthopantomogram. The computed tomography showed that it was asymmetrically enlarged and had a cellular structure. There was detected asymmetric micrognathia. The comprehensive rehabilitation plan included orthodontic treatment, myotherapy, speech therapy, mechanotherapy. The use of removable orthodontic appliances led to the normal size of the dentition and their relation, significantly reduced functional disorders and improved facial aesthetics. Five years after completion of orthodontic treatment, the physiological occlusion and amplitude of the mandibular movements remained, but the right mandibular angle was flattened. Conclusion. The comprehensive rehabilitation of a child with asymmetrical micrognathia and mandibular condylar hyperplasia started in mixed dentition stage provided conditions for the formation of normal permanent dentition and the improvement of functional disorders and facial aesthetics; our results allow us to suggest the positive effect of our tactics for treatment of the patient.

scholarly journals Examination of the bioelectrical activity of the masticatory muscles during Angle’s Class II division 2 therapy with an activator

2014 ◽  
Vol 71 (12) ◽  
pp. 1116-1122
Author(s):  
Djordje Petrovic ◽  
Sanja Vujkov ◽  
Branislava Petronijevic ◽  
Ivan Sarcev ◽  
Igor Stojanac
Keyword(s):  
Maximal Voluntary Contraction ◽  
Orthodontic Treatment ◽  
Class Ii ◽  
Masticatory Muscles ◽  
Voluntary Contraction ◽  
First Year ◽  
Bioelectrical Activity ◽  
Study Group ◽  
Electromyographic Activity ◽  
Angle Class

Background/Aim. The muscles of the orofacial region have great influence on the development of dentition and occlusion formation. It is known that improper function of these muscles is one of the major etiological factors in malocclusion. A correlation between function disorders of orofacial muscle and occlusion disorders has been confirmed, as well as a correlation between the bioelectric activity of the masticatory muscles, recorded by electromyography, and bite force upon maximal voluntary contraction of these muscles. The aim of the study was to analyze the bioelectriacal activity of temporal and masseter muscles. Methods. The sample consisted of 100 subjects of both sexes, divided into the control group (n = 30) with neutral and complete dental arches, and the study group (n = 70) of patients with distal occlusion. Electromyographic measurement of bioelectric potentials in all the subjects was conducted for the examined muscles in the physiologic rest position, central mandible occlusion, and during maximal voluntary contraction of muscles and saliva swallowing, in Angle Class I and II/2 occlusal relation-ships, prior to treatment, after one year of the orthodontic treatment and after the treatment with an activator. Results. Comparing the values of thebioelectrical activity in the control and the study group before the treatment, a decreased muscle activity was established in all the three positions in the study group. After the first year of orthodontic treatment the results showed an elevation in the bioelectrical activity in both muscles. After treatment with an activator, the bioelectrical activity in both muscles in the study group was higher than before the treatment, as it is confirmed by a positive highly significant coefficient of correlation. Conclusion. In all the three measured positions of the mandible with Angle Class II/2 malocclusion, bioelectrical activity was lowest at baseline and increased during the first year of treatment, and at the end of the treatment it partially reduced close to the approximate values in normal occlusion. Research on electromyographic activity of masticatory muscles is useful in everyday clinical practice, especially in present distinctive skeletal discrepancy before, during and after orthodontic treatment, if on the bases of the results we can evaluate the treatment, but also determine the start and duration of the retention period and retention device type.

scholarly journals Associations of Electromyographic Activity of Anterior T aphic Activity of Anterior Temporalis Muscles, Sex, and Occlusal Classes in Asymptomatic Young Adults

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
Aneta Wieczorek ◽  
◽  
Marcin Czarnek ◽  
Jolanta E. Loster ◽  
◽  
...  
Keyword(s):  
Young Adults ◽  
Muscle Activity ◽  
Masticatory Muscles ◽  
Class I ◽  
Electromyographic Activity ◽  
Mandibular Movement ◽  
Occlusal Contact ◽  
Contact Points ◽  
The Right ◽  
Craniofacial Complex

Symmetry evaluation of the craniofacial complex generally involves models of mandibular movement and masticatory muscle activity, especially during the growth of the craniofacial complex. Objectives: The aim of the study was to determine what, if any, associations exist between the activity of the masticatory muscles, sex, and occlusal classes in asymptomatic young adults. Methods:18-year-old volunteers, showing no symptoms of TMD based on an RDC/TMD examination, were included in the study.Surface electromyography (sEMG) recording was used to quantify the activity of masticatory muscles. The occlusal contact points were analyzed using a T-scan III Evolution 7.01 device. Occlusal classes were graded, employing an approach based on plaster study models. Results: In Class I–II subjects, we found significant differences only in the voltage of LTA in correlation with the gender and occlusal Class. Conclusions: Our findings show that the electromyography voltage of LTA significantly differs according to sex and occlusal Class. The voltage is higher in the female occlusal class II group, while the voltage is less in the male Class I and II group. This may be responsible for the symmetry index, which shows the predominance of the right-side muscles in all gender and occlusal groups.

scholarly journals Electromyographic activity of the masseter muscle in individuals with group function and canine guidance

2021 ◽  
Vol 15 (4) ◽  
pp. 232-238
Author(s):  
Nathália de Oliveira Domingos ◽  
Roberto Bernardino Júnior ◽  
Patrícia Teixeira de Carvalho Gaspar ◽  
Frederico Balbino Lizardo ◽  
César Ferreira Amorim ◽  
...  
Keyword(s):  
Clinical Evidence ◽  
Masticatory Muscles ◽  
Emg Activity ◽  
Electromyographic Activity ◽  
Group Function ◽  
Canine Guidance ◽  
Student’S T ◽  
The Right ◽  
Masseter Muscles ◽  
Student’S T Test

Background. There is no general consensus in restorative dentistry about which lateral guidance should be established. Some studies have shown that canine guidance decreases the tension of masticatory muscles. Others have reported that group function might achieve a better physiologic distribution of occlusal forces. Also, some reports have shown that both guidances are equally acceptable. Despite all discussions, clinical evidence of one guidance being superior to another is limited. Thus, this study aimed to analyze the electromyographic (EMG) activity of masseter muscles in individuals with group function and canine guidance. Methods. Twenty volunteers of both genders, aged 20-25, were divided into two groups: GF (group function guidance, n=10) and CA (canine guidance, n=10). EMG activity of masseters was captured using surface electrodes during habitual maximum intercuspation (HMI) and right and left lateral jaw movements and recorded using EMG amplitude values (RMS – root means square). Student’s t-test was used to compare mean RMS values between the groups and lateral movements in each group. Results. During HMI, there was no difference in masseter EMG activity between the groups. Both masseters showed higher activity in group GF only on the right side during lateral movements, while the left masseter exhibited higher activity on the nonworking side in both groups. The activity of both masseters distributed by tooth was higher in group CA. Conclusion. During tooth restorative procedures, any guidance is acceptable considering HMI. However, group function guidance is more favorable during lateral movements due to greater dissipation of occlusal pressures.

scholarly journals Assessment of the bioelectric activity of the masticatory muscles in orthopedic treatment with partial removable plate prostheses

2021 ◽  
Author(s):  
A. V. Ivaschenko ◽  
A. E. Yablokov ◽  
M. V. Shcherbakov ◽  
I. V. Bazhutova ◽  
S. V. Vinnik
Keyword(s):  
Masticatory Muscles ◽  
Control Group ◽  
Bioelectrical Activity ◽  
Main Criterion ◽  
Orthopedic Treatment ◽  
Bioelectric Activity ◽  
Removable Plate ◽  
The Right ◽  
Full Adaptation ◽  
Number Of Authors

Relevance. According to a number of authors, it is known that full adaptation to complete removable dentures occurs within 3 months [3–5, 9]. The main criterion for patients getting used to removable dentures is the synchronization of the work of the masticatory muscles and, as a consequence, the normalization of the chewing function.The aim of the study was to evaluate the bioelectrical activity of the masticatory muscles in patients using the CSPP.Materials and methods. In patients of the control (n = 23) and main (n = 63) groups, electromyographic examination was performed using the electroneuromyographic system "Synapsis" (Neurotechnology, Russia). Registration of the bioelectric activity of the chewing muscles was carried out directly on the day of applying the prostheses, after 1 and 3 months, respectively.Results and discussion. The electromyographic indices of the masticatory muscles in the patients of the control group decreased within one month after the treatment and amounted to 231 ± 18.2 μV for the right and 229 ± 16.1 μV for the left proper chewing muscles. The values were also reduced for the right and left temporal muscles – 228 ± 15.2 μV and 225 ± 24.1 μV (p < 0.05). It should be noted that the electromyographic parameters in patients of the main group were comparable to the lower limit of the norm and amounted to 269 ± 16.5 μV and 256 ± 20.4 μV, respectively, after one month of treatment.Conclusions. In the treatment of dysfunction of the temporomandibular joint with the use of thermoplastic prostheses, an increase in the biopotentials of the masticatory muscles is observed. In the orthopedic treatment of patients with terminal dentition defects using thermoplastic prostheses, the electromyographic parameters of the masticatory muscles are most close to normal after 3 months of using these prostheses.

DIAGNOSTIC OF FUNCTIONAL DISORDERS OF DENTOFACIAL ANOMALIES IN CHILDREN DURING ORTHODONTIC TREATMENT

2020 ◽  
Vol 5 (2) ◽  
pp. 88-92
Author(s):  
O.V. Dudnik ◽  
Ad.A. Mamedov ◽  
Ar.S. Chertikhina ◽  
A.R. Beznosik ◽  
D.S. Bille
Keyword(s):  
Orthodontic Treatment ◽  
Functional Disorders

scholarly journals Steering the Mandible in the Right Direction : Forsus Case Series

2021 ◽  
pp. 030157422110054
Author(s):  
Prachi Gohil ◽  
Sonali Mahadevi ◽  
Bhavya Trivedi ◽  
Neha Assudani ◽  
Arth Patel ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Case Series ◽  
Treatment Compliance ◽  
Class Ii ◽  
Skeletal Class ◽  
Skeletal Class Ii ◽  
Technological Advances ◽  
Functional Appliances ◽  
The Right ◽  
Mandibular Retrognathia

We are in the process of discovery of new vistas for technological advances in terms of various appliances with a vision of making orthodontic treatment compliance free as well as successful. Due to improved technology, the enigma of treating the Class II syndrome is palliated. “Out of the box” thinking has become a norm to treat certain situations that were not corrected in noncompliant patients. Fixed functional appliances are valuable tools introduced to assist the correction of skeletal Class II malocclusion with mandibular retrognathia at the deceleration stage of growth for achieving stable results. In this direction a case series is reported of patients having the above conditions and undergoing orthodontic treatment using a Forsus FFA. Joining hands with technology is a win-win situation for both the patient and the orthodontist.

Smartphone addiction and the relationship with head and neck pain and electromiographic activity of masticatory muscles

Work ◽  
2021 ◽  
pp. 1-8
Author(s):  
Fabiana Foltran Mescollotto ◽  
Érica Brito Gonçalves ◽  
Ester Moreira de Castro Carletti ◽  
Ana Beatriz Oliveira ◽  
Elisa Bizetti Pelai ◽  
...  
Keyword(s):  
College Students ◽  
Neck Pain ◽  
Head And Neck ◽  
Muscle Activity ◽  
Neck Region ◽  
Masticatory Muscles ◽  
Smartphone Addiction ◽  
Before And After ◽  
Smartphone Use ◽  
The Right

Background: Excessive use of smartphones may be associated with behavioral and physical health changes and might cause musculoskeletal alterations in the head and neck region. Objective: To evaluate the prevalence of smartphone addiction in college students and its correlation with symptoms of head and neck pain and masticatory and trapezius muscle activity while resting, before and after smartphone use. Methods: Twenty university students participated in the study. They answered the Smartphone Addiction Scale and the Fonseca Anamnestic Index. Next, the participants were seated and prepared for electromyography through the placement of surface electrodes on the masseter, temporal, and trapezius muscles. Rest condition data were collected for 10 seconds before and after 30 minutes of smartphone use. Results: The results showed that 35% of the evaluated individuals were classified as smartphone addicted and 35% reported no head or neck pain in the previous 30 days. There was no association between smartphone use and head and neck pain. In the electromyography, there was an increase in RMS values after smartphone use in the right and left masseter muscles and the left trapezius. Conclusion: College students presented a high prevalence of smartphone addiction and head and neck pain, but these were not statistically associated. There was a change in muscle activity only in the right trapezius muscles before and after 30 minutes of smartphone use. These findings are contrary to the current belief that the use of smartphones correlates with pain in the neck region and changes in the electrical muscle activity, leading to fatigue in the cervical muscles.

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