scholarly journals Electromyographic features and efficacy of orofacial myofunctional treatment for skeletal anterior open bite in adolescents: an exploratory study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Hong Hong ◽  
Yue Zeng ◽  
Xiaomin Chen ◽  
Caixia Peng ◽  
Jianqing Deng ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Morphological Characteristics ◽  
Masticatory Muscles ◽  
Open Bite ◽  
Craniofacial Morphology ◽  
Electromyographic Activity ◽  
Anterior Open Bite ◽  
Normal Occlusion ◽  
Before And After ◽  
Vertical Height

Abstract Background Due to the multifactorial aetiology and unpredictable long-term stability, skeletal anterior open bite (SAOB) is one of the most intractable conditions for orthodontists. The abnormal orofacial myofunctional status (OMS) may be a major risk factor contributing to the development and relapse of SAOB. This study is aimed at evaluating the OMS and the efficacy of orofacial myofunctional therapy (OMT) alone for SAOB subjects. Methods Eighteen adolescents with SAOB (4 males, 14 females; age: 12–18 years) and eighteen adolescents with normal occlusion (2 males, 16 females; age: 12–18 years) were selected. The electromyographic activity (EMGA) associated with mastication and closed mouth state was measured. Lateral cephalography was used to evaluate craniofacial morphology. Wilcoxon signed rank tests and t-tests were performed to evaluate myofunctional and morphological differences. Pearson or Spearman correlation analysis was used to investigate the correlations between EMGA and morphological characteristics. SAOB subjects were given OMT for 3 months, and the EMGA was compared between before and after OMT. Results During rest, anterior temporalis activity (TAA) and mentalis muscle activity (MEA) increased in SAOB subjects, but TAA and masseter muscle activity (MMA) decreased in the intercuspal position (ICP); and upper orbicularis activity (UOA) and MEA significantly increased during lip sealing and swallowing (P < 0.05). Morphological evaluation revealed increases in the FMA, GoGn-SN, ANS-Me, N-Me, L1-MP, U6-PP, and L6-MP and decreases in the angle of the axis of the upper and lower central incisors and OB in SAOB subjects (P < 0.05). TAA, MMA and anterior digastric activity (DAA) in the ICP were negatively correlated with vertical height and positively correlated to incisor protrusion. MEA was positively correlated with vertical height and negatively correlated with incisor protrusion; and the UOA showed a similar correlation in ICP, during sealing lip and swallowing. After SAOB subjects received OMT, MEA during rest and TAA, MMA and DAA in the ICP increased, while UOA and MEA decreased (P < 0.05). Conclusion SAOB subjects showed abnormal OMS features including aberrant swallowing patterns and weak masticatory muscles, which were interrelated with the craniofacial dysmorphology features including a greater anterior facial height and incisor protrusion. Furthermore, OMT contributes to OMS harmonization, indicating its therapeutic prospect in SAOB.

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.

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 Acute Effect of the Compression Technique on the Electromyographic Activity of the Masticatory Muscles and Mouth Opening in Subjects with Active Myofascial Trigger Points

2020 ◽  
Vol 10 (21) ◽  
pp. 7750 ◽  
Author(s):  
Michał Ginszt ◽  
Grzegorz Zieliński ◽  
Marcin Berger ◽  
Jacek Szkutnik ◽  
Magdalena Bakalczuk ◽  
...  
Keyword(s):  
Mouth Opening ◽  
Trigger Points ◽  
Acute Effect ◽  
Masticatory Muscles ◽  
Study Group ◽  
Electromyographic Activity ◽  
Compression Technique ◽  
Myofascial Trigger Points ◽  
Stomatognathic System ◽  
Before And After

Active myofascial trigger points (MTrPs) in masticatory muscles are associated with a reduced range of motion and muscle weakness within the stomatognathic system. However, it is hard to identify the most effective treatment technique for disorders associated with MTrPs. The objective of this study was to analyze the acute effect of the compression technique (CT) on active maximal mouth opening (MMO) and electromyographic activity of the masseter (MM) and temporalis anterior (TA) muscles in subjects with active myofascial trigger points in the MM muscles. The study group comprised 26 women (mean age 22 ± 2) with bilateral active myofascial trigger points (MTrPs) in the MM. The control group comprised 26 healthy women (mean age 22 ± 1) without the presence of MTrPs in the MM. Masticatory muscle activity was recorded in two conditions (during resting mandibular position and maximum voluntary clenching) before and after the application of the CT to the MTrPs in MM. After the CT application, a significant decrease in resting activity (3.09 μV vs. 2.37 μV, p = 0.006) and a significant increase in clenching activity (110.20 μV vs. 139.06 μV, p = 0.014) within the MM muscles were observed in the study group, which was not observed within TA muscles. Controls showed significantly higher active MMO values compared to the study group before CT (50.42 mm vs. 46.31 mm, p = 0.024). The differences between the study group after CT and controls, as well as among the study group before and after CT did not reach the assumed level of significance in terms of active MMO. The compression technique appears to be effective in the improvement of the active maximal mouth opening and gives significant acute effects on bioelectric masticatory muscle activity. Therefore, CT seems to be effective in MTrPs rehabilitation within the stomatognathic system.

Correlation between histochemistry and muscle activity of jaw muscles in cats

1986 ◽  
Vol 60 (4) ◽  
pp. 1393-1400 ◽  
Author(s):  
G. C. Gorniak
Keyword(s):  
Muscle Activity ◽  
Significant Positive Correlation ◽  
Morphological Characteristics ◽  
Significant Negative Correlation ◽  
Relative Difference ◽  
Masticatory Muscles ◽  
Emg Activity ◽  
Fiber Types ◽  
Cross Sectional ◽  
Fast Twitch

Studies on limb muscles of mammals indicate that the pattern of electromyographic (EMG) activity reflects the histochemical profile of the muscle. This relationship suggests that EMG activity may permit a prediction of certain morphological characteristics of the muscle being studied. In this study numerical descriptors of EMG activity of the masticatory muscles of cats are correlated with the distribution of fiber types, as well as with fiber and fascicle areas, to test the extent to which EMG can be used to predict regional morphology. The results show that the level of EMG activity and its duration have a significant positive correlation with the percentage of slow- and fast-twitch fatigue-resistant fibers and a significant negative correlation with the percentage of fast-twitch fatigable fibers and the ratio of fast-twitch fatigable to fast-twitch fatigue-resistant, plus slow fibers. No correlation was found between activity and fiber cross-sectional area; the descriptors showing significant correlation vary with the hardness of the food. Thus the level of EMG activity and its duration seemingly do provide an indicator of the relative difference in fiber distribution among muscles in a species.

Epidemiology of Posterior Crossbite in the Primary Dentition

2007 ◽  
Vol 32 (1) ◽  
pp. 73-78 ◽  
Author(s):  
Omar Gabriel da Silva Filho ◽  
Milton Santamaria Jr. ◽  
Leopoldino Capelozza Filho
Keyword(s):  
Epidemiological Survey ◽  
Sao Paulo ◽  
Primary Dentition ◽  
Open Bite ◽  
São Paulo ◽  
Anterior Open Bite ◽  
Posterior Crossbite ◽  
Normal Occlusion ◽  
The City

This epidemiological survey was conducted on 2,016 children from 8 private and 12 public preschools at the city of Bauru, São Paulo, Brazil. The sample was composed of 1,032 males and 984 females in the primary dentition stage, aged 3 to 6 years. Normal occlusion was observed in 26.74% of the sample; thus, 73.26% of children presented some type of malocclusion. Among the malocclusions, the following transverse problems were diagnosed: unilateral posterior crossbite (11.65%), anterior open bite associated with posterior crossbite (6.99%), bilateral posterior crossbite (1.19%), unilateral posterior crossbite associate with anterior crossbite (0.79%) and full crossbite (0.19%) totalizing 20.81% of the transverse problems. Mandibular functional deviation was observed in 91.91% of children with unilateral posterior crossbite, characterizing the functional unilateral posterior crossbite. The results demonstrated that the prevalence of posterior crossbite was compatible with previous data in the literature, with predominance of functional unilateral posterior crossbite.

Craniofacial Morphology in an Unusual Case with Nasal Aplasia Studied by Roentgencephalometry and Three-Dimensional CT Scanning

2004 ◽  
Vol 41 (2) ◽  
pp. 208-213 ◽  
Author(s):  
Noriyuki Kitai ◽  
Yoshitaka Iguchi ◽  
Mariko Takashima ◽  
Shumei Murakami ◽  
Sven Kreiborg ◽  
...  
Keyword(s):  
Unusual Case ◽  
Three Dimensional ◽  
Ct Scanning ◽  
Septal Cartilage ◽  
Open Bite ◽  
Craniofacial Morphology ◽  
Permanent Teeth ◽  
Class Iii ◽  
Anterior Open Bite ◽  
Mandibular Plane

Objective To examine the three-dimensional morphology of internal structures of the craniofacial region and present the orthodontic problems in an unusual case with nasal aplasia. Patient The patient was an 11.5-year-old boy with aplasia of the nose and nasal cavity with extremely constricted nasopharyngeal airway. He did not have mental or somatic retardation. The patient had dacryostenosis. The morphology of the craniofacial structures was characterized by absence of septal structures, including cribriform plate, perpendicular plate of ethmoid bone, vomer, and septal cartilage; bony hypotelorism; midface hypoplasia; short and retrognathic maxilla with Class III jaw relationship; average mandibular plane angle; high arched palate; severe anterior open bite with bilateral posterior crossbites; and dental anomalies (agenesis of four maxillary permanent teeth, microdontia, taurodontism, and short roots). Thus, the patient had characteristic dentofacial phenotype, which might be caused by a combination of the primary anomaly and the functional disturbances secondary to the nasal obstruction.

Time dependent changes of variables associated with malocclusion in patients with Duchenne muscular dystrophy

2003 ◽  
Vol 27 (1) ◽  
pp. 53-61 ◽  
Author(s):  
Shinichi Matsumoto ◽  
Takanobu Morinushi ◽  
Tadashi Ogura
Keyword(s):  
Duchenne Muscular Dystrophy ◽  
Muscular Dystrophy ◽  
Developmental Stages ◽  
Open Bite ◽  
Craniofacial Morphology ◽  
Time Dependent ◽  
Mixed Dentition ◽  
Dental Arch ◽  
Transverse Expansion ◽  
Normal Occlusion

Time dependent changes of parameters associated with malocclusion in patients with Duchenne muscular dystrophy (DMD) were examined in four dental developmental stages in 34 patients.We adopted activities of daily living (ADL) score, dental arch, craniofacial morphology, and electromyograms of the masseter and temporalis muscle as parameters. A comparison was made with the results in DMD subjects to data from healthy subjects with normal occlusion reported in the literature. In DMD subjects, manifestations of open-bite were related to ADL score, sagittal shortening and transverse expansion of the dental arch and vertical overgrowth of the lower jaw. Posterior cross-bite malocclusion was associated with differences in the time dependent changes between the jaws in transverse expansion. The malocclusion in DMD subjects was also related to the time dependent disproportional changes in masticatory muscle function by EMG. Occlusal deviation in DMD subjects became apparent at the late mixed dentition and malocclusion became definitely manifest from early permanent dentition.

scholarly journals Immediate effect of laryngeal surface electrical stimulation on swallowing performance

2018 ◽  
Vol 124 (1) ◽  
pp. 10-15 ◽  
Author(s):  
Keizo Takahashi ◽  
Kazuhiro Hori ◽  
Hirokazu Hayashi ◽  
Masako Fujiu-Kurachi ◽  
Takahiro Ono ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Muscle Activity ◽  
Vertical Movement ◽  
Tongue Pressure ◽  
Electromyographic Activity ◽  
Maximum Elevation ◽  
Before And After ◽  
Tongue Movements ◽  
Hyoid Movement ◽  
Dysphagic Patients

Surface electrical stimulation of the laryngeal region is used to improve swallowing in dysphagic patients. However, little is known about how electrical stimulation affects tongue movements and related functions. We investigated the effect of electrical stimulation on tongue pressure and hyoid movement, as well as suprahyoid and infrahyoid muscle activity, in 18 healthy young participants. Electrical stimulation (0.2-ms duration, 80 Hz, 80% of each participant’s maximal tolerance) of the laryngeal region was applied. Each subject swallowed 5 ml of barium sulfate liquid 36 times at 10-s intervals. During the middle 2 min, electrical stimulation was delivered. Tongue pressure, electromyographic activity of the suprahyoid and infrahyoid muscles, and videofluorographic images were simultaneously recorded. Tongue pressure during stimulation was significantly lower than before or after stimulation and was significantly greater after stimulation than at baseline. Suprahyoid activity after stimulation was larger than at baseline, while infrahyoid muscle activity did not change. During stimulation, the position of the hyoid at rest was descended, the highest hyoid position was significantly inferior, and the vertical movement was greater than before or after stimulation. After stimulation, the positions of the hyoid at rest and at the maximum elevation were more superior than before stimulation. The deviation of the highest positions of the hyoid before and after stimulation corresponded to the differences in tongue pressures at those times. These results suggest that surface electrical stimulation applied to the laryngeal region during swallowing may facilitate subsequent hyoid movement and tongue pressure generation after stimulation. NEW & NOTEWORTHY Surface electrical stimulation applied to the laryngeal region during swallowing may facilitate subsequent hyoid movement and tongue pressure generation after stimulation. Tongue muscles may contribute to overshot recovery more than hyoid muscles.

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