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.

scholarly journals Functional analysis of the results of using Ufi Gel P elastic soft lining from VOCO (Germany) as a means to reduce the time of adaptation to removable plate prostheses in the process of prosthetic rehabilitation of patients with asymmetric distally unlimited defects of dental rows in the early stages

2020 ◽  
Vol 103 (4) ◽  
pp. 53-60
Author(s):  
R. Symonenko ◽  
◽  
L. Etnis ◽  
Keyword(s):  
High Efficiency ◽  
Study Groups ◽  
Masticatory Muscles ◽  
Control Group ◽  
Bioelectrical Activity ◽  
Clinical Group ◽  
Bioelectric Activity ◽  
Rest Periods ◽  
Masticatory Efficiency ◽  
Elastic Lining

Objectives. Study of ways to increase the efficiency of immediate prosthetic treatment of patients with asymmetric distally unlimited defects of dental rows by using clinical relining of partial removable dentures with Ufi Gel P material from VOCO (Germany) to reduce the time of adaptation to dentures and normalize the functional activity of the masticatory muscles. Materials and methods. The efficiency of clinical relining of partial removable dentures using an elastic lining with Ufi Gel P from VOCO (Germany) was evaluated by electromyographic examination with BioEMG III electromyograph from BioRESEARCH Associates, Inc. (USA). The bioelectrical activity of the temporal and masseter muscles was evaluated during maximum voluntary clenching and mastication. The quantitative indicators of the amplitude of biopotentials (μV) and the qualitative characteristics of the chewing cycles were evaluated. Results. Our study has revealed that patients with asymmetric distally unlimited defects of dental rows had shown a significant decrease in the amplitude of biopotentials of the masticatory muscles compared to patients in the control group during maximum voluntary clenching and chewing, as well as a significant asymmetry of the bioelectric activity of the masticatory muscles on the right and left. During mastication there were significant differences in the size and duration of chewing cycles, a decrease in the duration of rest periods and the average number of chewing movements increased almost two times compared with intact dentition. A month after prosthetics, the indicators of bioelectrical activity of the masticatory muscles improved in both study groups of patients, but the most significant increase in amplitude was observed in the second group with a soft lining. There was also revealed a significant increase in the symmetry of bioelectric activity of the masticatory muscles, an improvement in the characteristics of the masticatory cycles and normalization of the activity and rest periods duration ratio in patients of the second group, while in patients of the 1st clinical group the indicators of symmetry did not change significantly. The average number of chewing movements required to chew the hazelnut kernel decreased to 38.7±16.2 and 29.3±10.7 respectively, in groups 1 and 2, which indicates an increase of masticatory efficiency. Conclusions. In the framework of this study, the high efficiency of Ufi Gel P (VOCO) elastic lining for the successful rehabilitation of patients with asymmetric distally unlimited defects in case of early prosthodontic interventions was proved. Our observations have shown that the use of the Ufi Gel P (VOCO) soft lining significantly increases the functional parameters of the masticatory system, shortens the period of adaptation to removable dentures and supports the formation of the alveolar processes relief without irregularities.

scholarly journals Analysis of the results of using elastic soft lining as a means to reduce the time of adaptation to removable plate prostheses in the process of the early prosthetic rehabilitation of patients

2020 ◽  
Vol 104 (5) ◽  
pp. 44-51
Author(s):  
R. Symonenko ◽  
◽  
L. Etnis ◽  
T. Kostiuk ◽  
◽  
...  
Keyword(s):  
High Efficiency ◽  
Study Groups ◽  
Masticatory Muscles ◽  
Control Group ◽  
Bioelectrical Activity ◽  
Clinical Group ◽  
Bioelectric Activity ◽  
Rest Periods ◽  
Masticatory Efficiency ◽  
Elastic Lining

Objectives. Study of ways to increase the efficiency of immediate prosthetic treatment of patients with asymmetric distally unlimited defects of dental rows by using clinical relining of partial removable dentures with elastic material to reduce the time of adaptation to dentures and normalize the functional activity of the masticatory muscles. Materials and methods. The efficiency of clinical relining of partial removable dentures using an elastic lining with Ufi Gel P from VOCO (Germany) was evaluated by electromyographic examination with BioEMG III electromyograph from BioRESEARCH Associates, Inc. (USA). The bioelectrical activity of the temporal and masseter muscles was evaluated during maximum voluntary clenching and mastication. The quantitative indicators of the amplitude of biopotentials (μV) and the qualitative characteristics of the chewing cycles were evaluated. Results. Our study has revealed that patients with asymmetric distally unlimited defects of dental rows had shown a significant decrease in the amplitude of biopotentials of the masticatory muscles compared to patients in the control group during maximum voluntary clenching and chewing, as well as a significant asymmetry of the bioelectric activity of the masticatory muscles on the right and left. During mastication there were significant differences in the size and duration of chewing cycles, a decrease in the duration of rest periods and the average number of chewing movements increased almost two times compared with intact dentition. A month after prosthetics, the indicators of bioelectrical activity of the masticatory muscles improved in both study groups of patients, but the most significant increase in amplitude was observed in the second group with a soft lining. There was also revealed a significant increase in the symmetry of bioelectric activity of the masticatory muscles, an improvement in the characteristics of the masticatory cycles and normalization of the activity and rest periods duration ratio in patients of the second group, while in patients of the 1st clinical group the indicators of symmetry did not change significantly. The average number of chewing movements required to chew the hazelnut kernel decreased to 38.7±16.2 and 29.3±10.7 respectively, in groups 1 and 2, which indicates an increase of masticatory efficiency. Conclusions. In the framework of this study, the high efficiency of elastic lining for the successful rehabilitation of patients with asymmetric distally unlimited defects in case of early prosthodontic interventions was proved. Our observations have shown that the use of the soft lining significantly increases the functional parameters of the masticatory system, shortens the period of adaptation to removable dentures and supports the formation of the alveolar processes relief without irregularities.

scholarly journals ANALYSIS OF THE DYNAMICS OF FUNCTIONAL OCCLUSION INDICATORS IN THE CONSTRUCTION OF OCCLUSION SURFACES OF ORTHOPEDIC STRUCTURES

2020 ◽  
Vol 73 (12) ◽  
pp. 2651-2656
Author(s):  
Svitlana P. Yarova ◽  
Sergii O. Turchenenko ◽  
Iryna M. Tkachenko ◽  
Yuriy Yu. Yarov
Keyword(s):  
Functional Condition ◽  
Masticatory Muscles ◽  
Main Group ◽  
Suggested Method ◽  
Control Group ◽  
Orthopedic Treatment ◽  
Functional Parameters ◽  
Occlusal Surfaces ◽  
Left And Right ◽  
And Control

The aim: Is to evaluate the effectiveness of the proposed method of constructing occlusal surfaces of orthopedic structures by monitoring the dynamics of functional indicators of occlusion and the functional condition of the masticatory muscles. Materials and methods: The object of the study was made up by 64 patients with included defects of the dentition of the 3rd class according to Kennedy. Patients were divided into two equal groups – the main group (patients were treated by using the suggested method of construction of occlusal surfaces of orthopedic structures) and control (dentition defects were replaced according to the traditional protocol). Results: The results of evaluating the effectiveness of the proposed method showed that the index of symmetry of the anterior bundles of the temporal muscles dropped by 18.5%, the index of symmetry of the masticatory muscles reduced by 22%, the torque of the mandible reduced by 32%, the index of stabilizing occlusal – by 27%, relative efforts of balance disturbance for more than 10 % regarding the left and right reduced by a factor of 4.4, the rate of opening time was 1.5 times higher than before, the rate of time of opening of the jaws – 1.8 times. Conclusions: The use of the suggested method of orthopedic treatment with temporary structures leads to probable changes in the studied functional parameters in comparison with the control group (p <0,05).

scholarly journals FEATURES OF MANUFACTURE OF ADVANCED PROVISIONAL BRIDGE-BASED PROSTHESES

2021 ◽  
pp. 33-37
Author(s):  
А. В. Kostyshyn
Keyword(s):  
High Efficiency ◽  
Age Groups ◽  
Masticatory Muscles ◽  
Pathological Process ◽  
Muscle Group ◽  
Control Group ◽  
Masticatory Muscle ◽  
Orthopedic Treatment ◽  
Group 2 ◽  
Reinforcement Model

Abstract. The relevance of the topic is related to the need to improve methods of preparation of dentitions for orthopedic treatment, taking into account the defects of dentitions in patients with reduced occlusion height, taking into account the condition of the masticatory muscles and temporary use of plastic dentures, which provide gradual lifting of occlusion to normalize the masticatory group muscles and reorganization of myostatic reflexes. The aim of the research. Improving the effectiveness of preparation for orthopedic treatment of patients with partial tooth loss, with reduced occlusion height, by improving the design of a temporary bridge-based prosthesis. Materials and methods of research. We examined, treated and conducted clinical observation of 93 patients, who were divided into three groups according to the height of the reduction in occlusion, to achieve this goal and solve problems during the dissertation. Group 1 consisted of 32 patients with included dentition defects with reduced occlusion height up to 2 mm (n=32), group 2 - patients with included dentition defects with reduced occlusion height up to 2-4 mm (n=31), group 3 - these are patients with included dentition defects with reduced occlusion height up to 4-6 mm (n=30). All patients of the main groups belonged to the second and third age groups according to the WHO, aged 35-55 years. The control group (n=30) are young people who belonged to the 1st age group according to the WHO with intact dentition, without concomitant somatic and dental pathology, were admitted in one visit. Also, 123 fiberglass-reinforced plastic prostheses were made. Research results. When drawing up a plan for orthopedic treatment of patients with reduced occlusion height, we took into account possible complications, which are characterized by chipping of the facing material, pathological changes in the temporomandibular joint and masticatory muscle group. We have improved the method of manufacturing non-removable temporary plastic orthopedic constructions by reinforcing with fiberglass tapes and beams, to prevent them and gradually raise the bite. Expanded data on the dynamics of changes in myostatic reflexes and the effectiveness of the use of fixed orthopedic constructions, depending on the pathological process, the timing of adaptation of the masticatory muscle group to orthopedic constructions, according to the degree of reduction in occlusion height. The absence of complaints of breakage and other technical defects of the proposed temporary orthopedic constructions in 100% of cases, successfully allows to use it in the clinic of orthopedic dentistry. A new method of preparing patients for permanent orthopedic treatment by combined reinforcement of temporary non-removable bridge constructions with fiberglass tapes and beams is proposed, which differ in that after preliminary modeling of the frame of the bridge constructions, the technology of double reinforcement, model two support platforms with a step-like transition between them, in which fiberglass tapes and beams are fitted with dental tweezers, after which they are polymerized by the generally accepted method with a photopolymer lamp. Complete the modeling of the constructions and polymerize the prosthesis in the pneumopolymerizer with subsequent grinding and polymerize the prosthesis. Conclusion. The results of the research revealed the high efficiency of the improved method of manufacturing non-removable makeshift plastic of orthopedic constructions.

scholarly journals THE ANALYSIS OF EMG VALUES IN PATIENTS USING REMOVABLE IMPLANT-RETAINED OVERDENTURES FOR A LONG PERIOD OF TIME

2019 ◽  
Vol 15 (3) ◽  
pp. 139-145 ◽  
Author(s):  
Любовь Дубова ◽  
Lyubov Dubova ◽  
Евгений Ожигов ◽  
Evgeniy Ozhigov ◽  
Алексей Ступников ◽  
...  
Keyword(s):  
Normal Level ◽  
Clinical Studies ◽  
Masticatory Muscles ◽  
Dynamic State ◽  
Bioelectrical Activity ◽  
Dynamic Parameters ◽  
Bioelectric Activity ◽  
Long Period ◽  
Stomatognathic System

Subject. The state of the stomatognathic system in patients who used removable implant-retained overdentures for a period more than 4 years was analyzed by evaluating the bioelectrical activity of temporal and masticatory muscles. Objectives ― to analyze the influence of long-term usage of removable implant-retained overdentures on the dynamic parameters of the stomatognathic system by evaluating the bioelectrical activity of temporal and masticatory muscles. Methods. Clinical studies of bioelectrical activity and symmetry of the temporal and masticatory muscles using surface electromyography were carried out. Electromyography was carried out in five probes: physiological rest, occlusion, natural swallowing, clench and clench on rolls. Results. It was revealed that in a state of physiological rest and occlusion, the absolute electromyography indicators were elevated. During natural swallowing, the bioelectric activity of the muscles in patients who used removable implant-retained overdentures was characterized as reduced. During clenching and clenching on rolls, the indicators were at the level of the lower limit of the norm. It was also found that the symmetry of the temporal and masticatory muscles was below the normal level. Conclusions. The obtained data is a sign of the modified dynamic state of the stomatognathic system in patients who used removable implant-retained overdentures. In addition to changes of the bioelectric activity of the muscles, a significant violation of the symmetry of the muscles has been revealed.

Coherence parameters of cerebral bioelectric activity and blood serum levels of phosphorylated neurofilaments in comorbid alcohol dependence and affective disorders

2021 ◽  
pp. 5-11
Author(s):  
С.А. Галкин ◽  
О.В. Рощина ◽  
Н.И. Кисель ◽  
С.А. Иванова ◽  
Н.А. Бохан
Keyword(s):  
Functional Connectivity ◽  
Alcohol Dependence ◽  
Blood Serum ◽  
Affective Disorder ◽  
Affective Disorders ◽  
Right Hemisphere ◽  
Control Group ◽  
Bioelectric Activity ◽  
The Right ◽  
Phosphorylated Neurofilaments

Введение. Наряду со многими психическими расстройствами алкогольная зависимость и аффективные расстройства являются результатом взаимодействия генетических, социальных и экологических факторов, что сопровождается морфофункциональными изменениями в центральной нервной системе. Тем не менее, основные причины и механизмы развития коморбидности алкоголизма и аффективных расстройств остаются не до конца ясны. Цель исследования - определение функциональной связности и уровня фосфорилированных нейрофиламентов у пациентов с алкогольной зависимостью и коморбидностью алкогольной зависимости и аффективного расстройства. Методика. Обследовано 60 пациентов после детоксикации: 30 пациентов с алкогольной зависимостью и 30 пациентов с коморбидным течением алкогольной зависимости и аффективного расстройства. Контрольную группу составили 20 психически и соматически здоровых лиц, сопоставимых по полу и возрасту. Исследование биоэлектрической активности головного мозга проводилось при помощи 16-канального энцефалографа. Анализировались общие усредненные значения внутри - и межполушарной когерентности. В сыворотках крови определяли содержание фосфорилированных нейрофиламентов методом твердофазного иммуноферментного анализа на полистироловых планшетах, предварительно покрытых куриными пoликлональными антителами. Результаты. При межгрупповом анализе были выявлены статистически значимо более низкие значения когерентности в правой гемисфере у пациентов с коморбидностью алкогольной зависимости и аффективного расстройства по сравнению с пациентами, страдающими только алкогольной зависимостью. Были обнаружены также статистически значимо более высокие значения концентрации нейрофиламентов в группе пациентов с коморбидностью алкогольной зависимости и аффективного расстройства по сравнению со здоровой группой контроля. При сравнении групп пациентов между собой были обнаружены боле высокие значения концентрации нейрофиламентов у пациентов с коморбидностью алкогольной зависимости и аффективного расстройства на уровне тенденции. Заключение. Наличие коморбидности алкоголизма и аффективных расстройств приводят к нейрофизиологическим изменениям в виде снижения функциональной связности коры головного мозга, особенно в правой гемисфере, а также увеличению степени нейронального повреждения. Background. Similar to many mental disorders, alcohol dependence and affective disorders result from interaction of genetic, social, and environmental factors associated with morpho-functional alterations in the central nervous system. However, major causes and mechanisms of the development of comorbid alcoholism and affective disorders are not fully clear. The aim of this study was to determine the functional connectivity and levels of phosphorylated neurofilaments in patients with alcohol dependence and comorbid alcohol dependence and affective disorder. Methods. 60 patients were evaluated after detoxification, including 30 patients with alcohol dependence and 30 patients with comorbid alcohol dependence and affective disorder. The control group consisted of 20 sex- and age-matched, mentally and somatically healthy individuals. Brain bioelectric activity was recorded with a 16-channel encephalograph. Overall average values of intra- and inter-hemispheric coherence were analyzed. Blood serum concentration of phosphorylated neurofilaments was measured by solid-phase enzyme immunoassay on polystyrene plates pre-coated with chicken polyclonal antibodies. Results. The intergroup analysis showed that coherence values for the right hemisphere were significantly lower in patients with comorbid alcohol dependence and affective disorder compared to patients with alcohol dependence alone (p=0.018). Also, concentrations of neurofilaments were significantly higher in the patient group with comorbid alcohol dependence and affective disorder compared to the healthy control group (p=0.042). Comparison of patient groups showed that neurofilament concentrations had a tendency toward higher values in patients with comorbid alcohol dependence and affective disorder (p=0.092). Conclusion. The presence of comorbid alcoholism and affective disorders leads to neurophysiological alterations evident as reduced functional connectivity of the cerebral cortex, particularly in the right hemisphere, as well as to the increased degree of neuronal damage.

scholarly journals The influence of cervical spine rehabilitation on bioelectrical activity (sEMG) of cervical and masticatory system muscles

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0250746
Author(s):  
Renata Kielnar ◽  
Anna Mika ◽  
Dorota Bylina ◽  
Jarosław Sołtan ◽  
Artur Stolarczyk ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Neck Pain ◽  
Temporomandibular Joint ◽  
Rehabilitation Programme ◽  
Control Group ◽  
Bioelectrical Activity ◽  
Upper Trapezius ◽  
The Right ◽  
The Impact ◽  
Experimental Group

Background Coexistence of temporomandibular joint discomfort along with cervical spine disorders is quite common, and is associated with many limitations and adverse symptoms for the patient. Both diagnostics and treatment of these ailments are difficult, and in many cases, the effects of therapy are not satisfactory. This study assessed the impact of a 3-week neck-only rehabilitation programme without direct intervention in the craniofacial area on the bioelectric activity of both the cervical spine and muscles in the craniofacial area among patients with idiopathic neck pain who do not report TMJ pain. Design A parallel group trial with follow-up; Setting: Rehabilitation Clinic. Methods Twenty five patients experiencing idiopathic neck pain underwent the 3-week rehabilitation programme. Thirty five age-matched subjects with no cervical spine and temporomandibular joint (TMJ) dysfunctions were control group. At baseline and after 3 weeks the cervical and craniofacial area muscles’ bioelectrical activity (sEMG) was evaluated. Results In the experimental group during cervical flexion, a significant decrease of sEMG amplitude was noted in the right (mean 25.1 μV; 95% CI: 21.5–28.6 vs mean 16.8 μV; 95% CI: 13.8–19.7) and left (mean 25.9 μV; 95% CI: 21.7–30.0 vs mean 17.2 μV; 95% CI: 13.6–20.7) Sternocleidomastoid as well as a significant increase in sEMG amplitude of the right (mean 11.1 μV; 95% CI: 7.9–14.2 vs mean 15.7 μV; 95% CI: 12.1–19.2) and left (mean 15.3 μV; 95% CI: 11.9–18.6 vs mean 20.2 μV; 95% CI: 15.7–24.2) Upper Trapezius muscles. In the experimental group, after therapy right and left Sternocleidomastoid, Temporalis Anterior and Masseter muscles presented lower fatigue levels. Conclusions Three weeks of rehabilitation without any therapeutic intervention in temporomandibular joint significantly decreased the bioelectrical activity of the neck and craniofacial muscles while improving the muscle pattern of coactivation in participants with idiopathic neck pain who do not report temporomandibular joint pain. These observations could be helpful in the physiotherapeutic treatment of neck and craniofacial area dysfunctions. Trial registration ID ISRCTN14511735—retrospectively registered.

scholarly journals CHARACTERISTICS OF THE BIOELECTRIC ACTIVITY OF THE MASTICATORY MUSCLES IN PATIENTS WITH HEARING DEPRIVATION IN PERMANENT OCCLUSION IN THE PHYSIOLOGICAL STATE

2020 ◽  
pp. 64-68
Author(s):  
V.D. Kuroiedova ◽  
Yu.K. Sokolohorska-Nykina
Keyword(s):  
Hearing Loss ◽  
Physiological State ◽  
Masticatory Muscles ◽  
Normal Hearing ◽  
Hearing Impaired ◽  
Control Group ◽  
Bioelectric Activity ◽  
Temporal Muscle ◽  
Functional Relationships ◽  
Functional Features

The study of the muscles of the maxillofacial area both in normal and pathological occlusions is the area of great interest, since muscle function is an indicator of complex functional relationships of the dento-mandibular system. Hearing impaired patients have many features related to the functional features of the maxillofacial area due to the slight or complete lack of use of facial muscles during speech or through the use of sign language. Hearing impaired children have 100% of bite pathology. The functional state of chewing and temporal muscles in schoolchildren with hearing loss in constant bite at rest was studied. Twenty-five hearing impaired students with permanent dentistry were studied at Poltava Special Boarding School for Deaf Children, who formed the study group. Among them, there were 13 women (62.5%) and 12 men (37.5%). The mean age was 18.7 ± 1.31 years. The control group used the data of the study of patients with constant physiological bite without hearing disorders, determined by M. I. Dmytrenko. The average age was 21.3 ± 1.25 years. The bioelectric activity of the chewing muscles was examined on an electromyographic complex. The average values of oscillation amplitude (μV) of muscle biopotential on both sides were determined. Muscle biopotentials were recorded for five seconds in a state of physiological calm with closed lips. The results show that all indicators of PD of chewing muscles in a state of physiological rest are almost 2 times higher (p˂0,05) in comparison with those of patients with normal hearing and physiological bite. The work of the temporal muscles in schoolchildren with hearing loss is characterized by symmetry. There is also greater electrical activity of the temporal muscle than the masticatory muscles at rest, unlike normal hearing patients. All patients with hearing impairment had 100% prevalence of dental anomalies. Biopotential of chewing muscle of I class. for angle was 2.7 times higher than in patients with the control group. The biopotential of the temporalis muscle in the ICE was 1.8 times higher (p˂0.05), which indicates a constant tension or insufficient muscle relaxation in patients with ICE. In patients with hearing loss of II class. for angle, the average value of the biopotential of the chewing muscle was 2.3 times higher than in patients in 2 group, the temporal muscle was 1.5 times higher.

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 Masticatory Muscles Activity in Sport Climbers

2020 ◽  
Vol 17 (4) ◽  
pp. 1378 ◽  
Author(s):  
Michał Ginszt ◽  
Grzegorz Zieliński ◽  
Aleksandra Byś ◽  
Piotr Gawda ◽  
Piotr Majcher
Keyword(s):  
Muscle Activity ◽  
Masticatory Muscles ◽  
The Body ◽  
Control Group ◽  
Bioelectrical Activity ◽  
Masticatory Muscle ◽  
Sports Activity ◽  
Sport Climbing ◽  
Teeth Clenching ◽  
Masticatory Muscle Activity

Masticatory muscle activity during teeth clenching is associated with changes in many physiological parameters throughout the body. Clenching can improve muscle activity, force production, rate of force development, and joint fixation. Hence, teeth clenching and masticatory muscle activity can be important in competitive sports activities. Sport climbing is becoming increasingly popular and will be included for the first time in the Summer Olympic Games, Tokyo, 2020. However, masticatory muscle activity in sport climbers has not yet been studied. The aim of the presented study is to compare the bioelectrical activity of the masticatory muscles in sport climbers and non-climbers in order to determine the relationship between these muscles and climbing activity. 44 subjects without masticatory system disorders (16 women and 28 men, average age 26.3) were divided into two groups of 22 sport climbers (8 women, 14 men, climbing experience >4 years), while 22 people (8 women, 14 men, with no regular sports activity) were assigned to the control group. Electromyographic examination of temporalis anterior (TA) and masseter muscle (MM) was evaluated in three conditions: during resting mandibular position, during maximum intercuspation clenching, and during maximum voluntary clenching with cotton rolls between teeth. For statistical analysis, the W Shapiro-Wilk test and the Mann-Whitney U test were used. Sport climbers showed significantly higher bioelectrical activities of MM during maximum intercuspation clenching (238.45 μV vs. 83.87 μV, p = 0.002), and during maximum voluntary clenching with cotton rolls between teeth (300.01 μV vs. 101.38 μV, p = 0.001) compared to controls. The differences between groups in relation to the resting bioelectrical activity of the MM muscles, and TA muscles in all conditions were not statistically significant (p > 0.05). Higher bioelectrical activity of masseter muscles during clenching in climbers can be associated with this sports activity. However, the mechanism remains unknown and requires future research.

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