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Mastigação e atividade eletromiográfica em crianças com mordida cruzada posterior; Mastication and electromyographic activity in children with posterior crossbite

TRAWITZKI, Luciana Vitaliano Voi; FELÍCIO, Cláudia Maria de; PUPPIN-RONTANI, Regina Maria; MATSUMOTO, Mirian Aiko Nakane; VITTI, Mathias
Fonte: CEFAC Saúde e Educação Publicador: CEFAC Saúde e Educação
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
37.12%
OBJETIVO: investigar a preferência mastigatória e o comportamento dos músculos mastigatórios, em crianças de 6 a 9 anos, com mordida cruzada posterior. MÉTODOS: 30 crianças foram selecionadas num serviço de Ortodontia de uma universidade pública. Após a concordância na participação no trabalho, foi realizada entrevista com a criança e seu responsável, para investigação de disfunção temporomandibular; análise da preferência mastigatória, por meio de registros em vídeo e avaliação eletromiográfica (EMG) dos músculos masseter e temporal anterior, durante a mastigação solicitada, direita e esquerda, de uma goma de marcar. RESULTADOS: houve diferença significante na atividade EMG dos músculos masseter e temporal anterior entre os lados de trabalho e balanceio, porém não houve diferença estatística quando foram comparadas as atividades EMG entre os lados de mordida cruzada e não cruzada, tampouco entre os lados de preferência e não preferência mastigatória. CONCLUSÃO: na amostra estudada não se verificou assimetria funcional muscular estabelecida.; PURPOSE: to investigate the masticatory preference and the behavior of masticatory muscles, in children between6 to 9-year old, with posterior crossbite. METHODS: 30 children were selected from the Orthodontical service of a public university. After consenting to take part in the study...

Electromyographic evaluation of mastication and swallowing in elderly individuals with mandibular fixed implant-supported prostheses

BERRETIN-FELIX, Giédre; NARY FILHO, Hugo; PADOVANI, Carlos Roberto; TRINDADE JUNIOR, Alceu Sergio; MACHADO, Wellington Monteiro
Fonte: Faculdade De Odontologia De Bauru - USP Publicador: Faculdade De Odontologia De Bauru - USP
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
37.12%
This study evaluated the effect of implant-supported oral rehabilitation in the mandible on the electromyographic activity during mastication and swallowing in edentulous elderly individuals. Fifteen patients aged more than 60 years were evaluated, being 10 females and 5 males. All patients were edentulous, wore removable complete dentures on both dental arches, and had the mandibular dentures replaced by implant-supported prostheses. All patients were submitted to electromyographic evaluation of the masseter, superior orbicularis oris muscles, and the submental muscles, before surgery and 3, 6 and 18 months postoperatively, using foods of different textures. The results obtained at the different periods were analyzed statistically by Kruskal-Wallis non-parametric test. Statistical analysis showed that only the masseter muscle had a significant loss in electromyographic activity (p<0.001), with a tendency of similar response for the submental muscles. Moreover, there was an increase in the activity of the orbicularis oris muscle during rubber chewing after treatment, yet without statistically significant difference. Mandibular fixed implant-supported prostheses in elderly individuals revealed a decrease in electromyographic amplitude for the masseter muscles during swallowing...

Influence of Abusive Vocal Habits, Hydration, Mastication, and Sleep in the Occurrence of Vocal Symptoms in Teachers

FERREIRA, Leslie Piccolotto; LATORRE, Maria do Rosario Dias de Oliveira; GIANNINI, Susana Pimentel Pinto; GHIRARDI, Ana Carolina de Assis Moura; KARMANN, Delmira de Fraga e; SILVA, Eliana Egerland; FIGUEIRA, Silmara
Fonte: MOSBY-ELSEVIER Publicador: MOSBY-ELSEVIER
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
37.29%
Some vocal disorders in teachers are associated with occupational factors, but there are few studies that analyze the influence of vocal habits, fluid intake, mastication, and sleep on these disorders. The objective was to analyze the Occurrence of vocal fatigue, hoarseness, and dry throat in elementary and high school teachers and their association with vocal habits, fluid intake, mastication, and sleep. A sample of 422 elementary and secondary school teachers was Studied using a specific questionnaire. The multiple regression analysis showed that hoarseness was associated with absence of water intake (odds ratio (OR) = 1.7; P = 0.047), yelling/speaking loudly (OR = 1.6; P = 0.058), jaw-opening limitations (OR = 3.8; P = 0.003). average of: 6 hours of sleep/light (OR = 1.7; P = 0.039), and waking-up feeling replenished (OR = 2.0; P = 0.020). The presence of vocal fatigue was significantly associated with yelling/speaking loudly (OR = 2.2: P = 0.013), speaking excessively (OR = 2.4; P = 0.023), difficulty to open the mouth to masticate (OR = 6.6; P = 0.003), less than 6 hours of sleep (OR = 4.0; P = 0.008), and waking-up feeling replenished (sometimes OR = 2.8: P = 0.003; or never OR = 3.3 P = 0.002). The presence of dry throat was associated with being a former smoker (OR = 3.3; P = 0.011) and having jaw-opening limitations (OR = 3.9; P = 0.021). In recent years...

Mastication effort study using photorefractive holographic interferometry technique

Oliveira, Glaura Caroena Azevedo de; Mori, Matsuyoshi; Gesualdi, Marcos Roberto da Rocha; Liberti, Edson Aparecido; Ferrara, Eduardo; Muramatsu, Mikiya
Fonte: ELSEVIER SCI LTD Publicador: ELSEVIER SCI LTD
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
37.12%
The purpose of this work was the force-displacement response analysis of the masticatory process in a dried human skull by Double-Exposure Photorefractive Holographic Interferometry Technique (2E-PRHI). The load concentration and dissipation of the forces from dried human skull were analysed at applied loading stands as a Simulation of Isolated Contraction (SIC) of some mastication muscles. The 2EHI and Fringe Analysis Method were used to obtain the quantitative results of this force-displacement response. These results document quantitatively the real biomechanical response from dried human skull under applied loading and it can be used for complementary study by finite element model and others analysis type. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

New image analysis of large food particles can discriminate experimentally suppressed mastication

Sugimoto, K.; Iegami, Carolina Mayumi; Iida, S.; Naito, M.; Tamaki, Regina; Minagi, S.
Fonte: WILEY-BLACKWELL; MALDEN Publicador: WILEY-BLACKWELL; MALDEN
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
37.12%
Objective parameters that could provide a basis for food texture selection for elderly or dysphagic patients have not been established. We, therefore, aimed to develop a precise method of measuring large particles (>2 mm in diameter) in a bolus and an analytical method to provide a scientific rationale for food selection under masticatory dysfunction conditions. We developed a new illumination system to evaluate the ability of twenty female participants (mean age, 23.4 +/- 4.3 years) to masticate carrots, peanuts and beef with full, half and one quarter of the number of masticatory strokes. We also evaluated mastication under suppressed force, regulated by 20% electromyographic of the masseter muscle. The intercept and inclination of the regression line for the distribution of large particles were adopted as coefficients for the discrimination of masticatory efficiency. Single set of coefficient thresholds of 0.10 for the intercept and 1.62 for the inclination showed excellent discrimination of masticatory conditions for all three test foods with high specificity and sensitivity. These results suggested that our method of analysing the distribution of particles >2 mm in diameter might provide the basis for the appropriate selection of food texture for masticatory dysfunction patients from the standpoint of comminution.

Preferência mastigatória em pacientes com paralisia facial periférica flácida de duração igual ou superior a seis meses: estudo clínico e eletromiográfico; Clinical and electromyographic study of lateral preference in mastication in patients with long-standing peripheral facial paralysis

Carvalho, Adriana Rahal Rebouças de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 18/02/2009 Português
Relevância na Pesquisa
37.58%
Introdução: a paralisia facial periférica (PFP) é caracterizada por lesão geralmente unilateral do nervo facial em qualquer parte de seu trajeto. Na paralisia total há perda dos movimentos de todos os segmentos da hemiface ipsilateral à lesão. Clinicamente observa-se que a maioria dos pacientes com PFP em fase flácida apresenta dificuldade para mastigar do lado paralisado, pois a manutenção dos alimentos entre as arcadas dentárias está comprometida pela falta de participação do músculo bucinador. Aliada a isso pode ocorrer incompetência labial devido à flacidez da hemiface afetada em conseqüência à queda da comissura labial ipsilateral. Objetivo: verificar as conseqüências da PFP unilateral na fase flácida, com duração de pelo menos seis meses, na função mastigatória quanto a preferência clínica mastigatória e diferença eletromiográfica entre os masseteres.Casuística e Método: foram selecionados 27 indivíduos de ambos os gêneros, com PFP em fase flácida com pelo menos seis meses de paralisia, com idade entre 16 anos e 67 anos, com dentição natural permanente, selecionados por um protocolo específico, complementado com exame clínico miofuncional e avaliação eletromiográfica de superfície nos músculos masseteres nas provas de aperto dentário e mastigação habitual. Resultados: de acordo com as respostas da anamnese...

Programa de avaliação e tratamento fonoaudiológico para a reabilitação da função mastigatória de indivíduos submetidos à cirurgia ortognática por deformidade dentofacial; Evaluation and treatment program for the rehabilitation of mastication of patients who underwent orthognathic surgery for dentofacial deformity

Mangilli, Laura Davison
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 07/05/2012 Português
Relevância na Pesquisa
37.4%
INTRODUÇÃO: Indivíduos com deformidade dentofacial apresentam alterações faciais verticais e/ou ântero-posteriores, com conseqüente presença de oclusão instável e pobre intercuspidação dentária, que podem causar comprometimentos nas funções do Sistema Miofuncional Orofacial sendo verificadas geralmente adaptações funcionais para cada tipo de deformidade. O objetivo desta tese foi realizar um ensaio clínico randomizado cuja variável de relevância foi a resposta funcional da mastigação após intervenção fonoaudiológica experimental em pacientes submetidos à cirurgia ortognática. MÉTODOS: Todos os pacientes submetidos à cirurgia ortognática, num período de 12 meses, que concordaram em participar do estudo. Os pacientes foram randomicamente distribuídos em dois grupos: grupo experimental (EG=6) e grupo de instrução (IG=5). O grupo controle foi constituído por indivíduos com oclusão dentária normal (CG=6). Os pacientes do EG foram submetidos a um protocolo de tratamento fonoaudiológico estruturado em seis sessões com enfoque técnico na função da mastigação. Os pacientes do IG foram submetidos a duas sessões supervisionadas de instruções direcionadas aos cuidados com a mastigação (tratamento padrão). As variáveis adotadas para a comparação dos grupos foram obtidas por meio de avaliação clínica e de avaliação eletromiográfica de superfície (EMGs)...

Effects of mandibular fixed implant-supported prostheses on masticatory and swallowing functions in completely edentulous elderly individuals

Berretin-Felix, Giédre; MacHado, Wellington Monteiro; Genaro, Katia Flores; Nary Filho, Hugo
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 110-117
Português
Relevância na Pesquisa
27.48%
Purpose: To evaluate the effect of oral rehabilitation with immediately loaded fixed implant-supported mandibular prostheses on chewing and swallowing in elderly individuals. Materials and Methods: Fifteen completely edentulous patients aged more than 60 years (10 women and rive men), wearing removable dentures in both arches, had a mandibular denture replaced by an implant-supported prosthesis. All individuals were evaluated before surgery and again 3, 6, and 18 months later with regard to mastication and swallowing conditions. Examinations entailed an interview, evaluation of tactile sensitivity of the face, and observation of food intake, masticatory type, formations of bolus, and pain during mastication. The swallowing evaluation comprised observation of clinical signs related to the oral and pharyngeal stages of swallowing, as well as the presence of oral residue. The findings of different evaluations before and 3, 6, and 18 months after the surgical-prosthetic procedure were statistically compared by analysis of variance for repeated measurements at a significance level of 5%. Results: The questionnaire revealed a reduction in complaints of masticatory and swallowing disturbances, a decreased need for liquid ingestion, and reduced choking and coughing. Clinical evaluations showed improved oral function and bolus propulsion for both solid and paste-consistency foods; pain during mastication was also resolved. Conclusion: Treatment with mandibular implant-supported dentures had positive effects on the clinical aspects of mastication and swallowing in elderly individuals.

Correlation of mastication and masticatory movements and effect of chewing side preference

Farias Gomes,Simone Guimarães; Custodio,William; Moura Jufer,Juliana Silva; Del Bel Cury,Altair Antoninha; Rodrigues Garcia,Renata Cunha Matheus
Fonte: Fundação Odontológica de Ribeirão Preto Publicador: Fundação Odontológica de Ribeirão Preto
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2010 Português
Relevância na Pesquisa
37.65%
The aims of this study were to correlate masticatory performance with mandibular movements during mastication, and to evaluate masticatory performance and mandibular movements of subjects with different types of mastication. Seventy-eight healthy dentate subjects were selected and divided into 2 groups: bilateral and unilateral chewers. This classification was set by using kinesiography during mastication of an artificial material. Unilateral mastication was defined as the majority of the cycles took place at one specific side. The same tracings used to define type of mastication were used to evaluate mandibular movements by means of its parameters. Masticatory performance was analyzed by comminution of the artificial material and a sieving method. Statistical analysis was performed by Spearman’s correlation method, and Mann-Whitney and Studentʼs t-test, when appropriate, at 5% significance level. No correlation was found between masticatory performance and parameters of mandibular movement during mastication. Bilateral chewers presented significantly better (p<0.05) masticatory performance than unilateral ones, however no differences in parameters of mandibular movement were found between groups. Within the limits of this study...

Masticatory function in temporomandibular dysfunction patients: electromyographic evaluation

Berretin-Felix,Giédre; Genaro,Katia Flores; Trindade,Inge Elly Kiemle; Trindade Júnior,Alceu Sergio
Fonte: Faculdade De Odontologia De Bauru - USP Publicador: Faculdade De Odontologia De Bauru - USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2005 Português
Relevância na Pesquisa
27.54%
Temporomandibular dysfunction (TMD) is a complex disturbance that involves the masticatory muscles and/or temporomandibular joint, causing damage to the masticatory function. This study evaluated the electromyographic activity of the masseter muscle during habitual mastication of bread, apple, banana, cashew nut and paraffin film (Parafilm M) in 25 adult subjects, of both gender, with TMD. The results were compared to those of a control group, composed of 15 adult subjects, of both sexes, free of signs and/or symptoms of TMD. The MYO-TRONICS Inc., K6-I computer software was used for electromyographic processing and analyzed the following parameters: duration of the act, duration of the masticatory cycle and number of cycles. No significant differences were found between subjects in the control group and individuals with TMD as to duration of the masticatory act and of the masticatory cycle, considering all materials used for mastication. The duration of the masticatory act and cycle was longer during mastication of paraffin film in both groups. The number of masticatory cycles was higher for mastication of apple in comparison to mastication of banana, in both groups. It can be concluded that the consistency of foods influences the duration parameters of the act...

Electromyographic evaluation of mastication and swallowing in elderly individuals with mandibular fixed implant-supported prostheses

Berretin-Felix,Giédre; Nary Filho,Hugo; Padovani,Carlos Roberto; Trindade Junior,Alceu Sergio; Machado,Wellington Monteiro
Fonte: Faculdade De Odontologia De Bauru - USP Publicador: Faculdade De Odontologia De Bauru - USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2008 Português
Relevância na Pesquisa
37.12%
This study evaluated the effect of implant-supported oral rehabilitation in the mandible on the electromyographic activity during mastication and swallowing in edentulous elderly individuals. Fifteen patients aged more than 60 years were evaluated, being 10 females and 5 males. All patients were edentulous, wore removable complete dentures on both dental arches, and had the mandibular dentures replaced by implant-supported prostheses. All patients were submitted to electromyographic evaluation of the masseter, superior orbicularis oris muscles, and the submental muscles, before surgery and 3, 6 and 18 months postoperatively, using foods of different textures. The results obtained at the different periods were analyzed statistically by Kruskal-Wallis non-parametric test. Statistical analysis showed that only the masseter muscle had a significant loss in electromyographic activity (p<0.001), with a tendency of similar response for the submental muscles. Moreover, there was an increase in the activity of the orbicularis oris muscle during rubber chewing after treatment, yet without statistically significant difference. Mandibular fixed implant-supported prostheses in elderly individuals revealed a decrease in electromyographic amplitude for the masseter muscles during swallowing...

Deformation of Nasal Septal Cartilage During Mastication

Dayeh, Ayman A. Al; Rafferty, Katherine L.; Egbert, Mark; Herring, Susan W.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /10/2009 Português
Relevância na Pesquisa
27.54%
The cartilaginous nasal septum plays a major role in structural integrity and growth of the face, but its internal location has made physiologic study difficult. By surgically implanting transducers in 10 miniature pigs (Sus scrofa), we recorded in vivo strains generated in the nasal septum during mastication and masseter stimulation. The goals were (1) to determine whether the cartilage should be considered as a vertical strut supporting the nasal cavity and preventing its collapse, or as a damper of stresses generated during mastication and (2) to shed light on the overall pattern of snout deformation during mastication. Strains were recorded simultaneously at the septo-ethmoid junction and nasofrontal suture during mastication. A third location in the anterior part of the cartilage was added during masseter stimulation and manipulation. Contraction of jaw closing muscles during mastication was accompanied by anteroposterior compressive strains (around −1,000 με) in the septo-ethmoid junction. Both the orientation and the magnitude of the strain suggest that the septum does not act as a vertical strut but may act in absorbing loads generated during mastication. The results from masseter stimulation and manipulation further suggest that the masticatory strain pattern arises from a combination of dorsal bending and/or shearing and anteroposterior compression of the snout. J. Morphol.

Influência do toro mandibular na atividade eletromiográfica dos músculos da mastigação; Influence of mandibular torus on electromyographic activity of the mastication muscles

Silva, José Mendes da
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 07/08/2014 Português
Relevância na Pesquisa
27.54%
O toro é uma excrescência óssea convexa, com crescimento lento, considerado de origem congênita, benigno, também denominado de exostose, com pouca significância clínica, sendo necessária sua remoção quando dificulta a confecção de prótese totais, parciais ou removíveis e a posição da língua, interferindo na fala ou ainda, dificultam a intubação cirúrgica. O objetivo deste trabalho foi analisar, por meio da eletromiografia, o padrão de comportamento (morfológico e funcional) da atividade dos músculos masseter e temporal nas condições posturais da mandíbula como o Repouso, Protrusão, Máxima Interscupidação Habitual (MIH), Apertamento Dental com Parafilme M®, Lateralidades Direita e Esquerda. O presente estudo também propôs analisar a eficiência dos ciclos mastigatórios e para tanto, foi utilizado a avaliação da mastigação habitual e não habitual por meio da integral da envoltória do sinal eletromiográfico obtido dos músculos masseter e temporal durante a mastigação habitual de uvas passas e amendoim e da mastigação não-habitual de Parafilme M®, considerando a presença ou não do toro mandibular. Diante dos resultados obtidos no presente trabalho foi possível concluir que, de um modo geral...

Hypoxie transitoire en relation avec les activités rythmiques des muscles de la mastication chez les patients atteints du bruxisme du sommeil

Dumais, Isabelle
Fonte: Université de Montréal Publicador: Université de Montréal
Tipo: Thèse ou Mémoire numérique / Electronic Thesis or Dissertation
Português
Relevância na Pesquisa
37.4%
Study Objectives: Sleep bruxism (SB) is a repetitive jaw-muscle activity characterized by clenching or grinding of the teeth and/or by bracing or thrusting of the mandible occurring during sleep. SB is scored, from electromyographic traces, as rhythmic masticatory muscle activity (RMMA). Most RMMA occurred during sleep in association with sleep arousal. Since not all RMMA episodes were associated with sleep arousal we hypothesized that some event could be observed in relation to small fluctuations of the oxygen level resulting in mild desaturation/hypoxia. Methods: Sleep laboratory or home recordings from 22 SB (teeth grinding) patients were analyzed from our data bank. A total of 143 RMMA/SB episodes were classified in 4 categories: (i) no arousal & no body movement; (ii) arousal + & no body movement; (iii) no arousal & body movement +; (iv) arousal + & body movement +. Minimum blood oxygen levels were assessed from finger oxymetry signal: 1) during the baseline period before RMMA, i.e., an average of 7 s before RMMA onset (-20 s to -14 s); 2) during RMMA, i.e. a window of 15 s corresponding to -5 s before the onset until +10 s after the episode. For all episodes, the minimum oximetry values were compared for each patient. Results: There was a significant variation of blood oxygen level over time (p=0.001) with a statistically significant transient hypoxia during RMMA at time (+7)...

Disfunções temporomandibulares : estudos sobre dor, mastigação e diagnóstico = Temporomandibular disorders: studies on pain, mastication and diagnostic; Temporomandibular disorders : studies on pain, mastication and diagnostic

Larissa Soares Reis Vilanova
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 02/12/2014 Português
Relevância na Pesquisa
37.4%
Disfunções temporomandibulares (DTM) são condições orofaciais patológicas comuns caracterizadas por dor na articulação temporomandibular e/ou nos músculos da mastigação. A DTM é uma condição comum de dor, especialmente em mulheres durante a fase reprodutiva. Desta maneira os objetivos dessa tese foram (1) avaliar se as flutuações hormonais ocorridas durante o ciclo menstrual alteram a sensibilidade dolorosa (SD), força máxima de mordida (FMM) e performance mastigatória (PM) de voluntárias com DTM, (2) avaliar se os movimentos mandibulares e a qualidade do sono alterariam com o tratamento com placas oclusais estabilizadoras e (3) comparar o diagnóstico baseado no Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) avaliando a confiabilidade e calibração entre o treinamento formal em relação a autoinstrução com documentos e filme. Para tanto, cinquenta voluntárias foram selecionadas e divididas em dois grupos de 25 participantes: (1) voluntárias com DTM e ciclos menstruais regulares e (2) voluntárias com DTM e utilizando contraceptivos orais. Foram analisados a sensibilidade dolorosa (SD) por meio da escala visual analógica, força máxima de mordida (FMM) por meio de sensores e performance mastigatória (PM) por meio do peneiramento. Essas variáveis foram avaliadas durante o período de quatro fases de um ciclo menstrual completo. As mesmas 50 voluntárias diagnosticados com SD participaram do segundo estudo...

Anatomical, functional, physiological and behavioural aspects of the development of mastication in early childhood

Le Révérend, Benjamin J. D.; Edelson, Lisa R.; Loret, Chrystel
Fonte: Cambridge University Press Publicador: Cambridge University Press
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
27.65%
Mastication efficiency is defined as the efficiency of crushing food between the teeth and manipulating the resulting particles to form a swallowable food bolus. It is dependent on the orofacial anatomical features of the subject, the coordination of these anatomical features and the consistency of the food used during testing. Different measures have been used to indirectly quantify mastication efficiency as a function of children's age such as observations, food bolus characterisation, muscle activity measurement and jaw movement tracking. In the present review, we aim to describe the changes in the oral physiology (e.g. bone and muscle structure, teeth and soft tissues) of children and how these changes are associated with mastication abilities. We also review previous work on the effect of food consistency on children's mastication abilities and on their level of texture acceptance. The lack of reference foods and differences in testing methodologies across different studies do not allow us to draw conclusions about (1) the age at which mastication efficiency reaches maturity and (2) the effect of food consistency on the establishment of mature mastication efficiency. The effect of food consistency on the development of children's mastication efficiency has not been tested widely. However...

Effect of hyposalivation on mastication and mandibular movements during speech

Gomes,Simone Guimarães Farias; Cury,Altair Antoninha Del Bel; Garcia,Renata Cunha Matheus Rodrigues
Fonte: Sociedade Brasileira de Pesquisa Odontológica - SBPqO Publicador: Sociedade Brasileira de Pesquisa Odontológica - SBPqO
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2011 Português
Relevância na Pesquisa
37.12%
The aim of this study was to evaluate whether patients with hyposalivation present damaged mastication or mandibular movements during speech. Forty subjects composed 2 groups: control and hyposalivation. Masticatory performance was assessed with a silicon-based artificial material and a 10-sieve method. Mandibular movements during speech were observed with a 3D jaw-tracking device. Data were analyzed with Student's t-test or the Mann-Whitney method (P < 0.05). The masticatory performance (mm) of control and hyposalivation were 4.40 ± 0.62 and 4.74 ± 1.34, respectively. Outcomes for speech movements (mm) were as follows: maximum vertical opening amplitude (10.8 ± 4.2; 9.9 ± 2.7) and displacements to the right (1.0 ± 0.8; 0.5 ± 0.6), left (1.8 ± 1.4; 2.3 ± 1.2), or anterior-posterior (2.8 ± 1.1; 2.9 ± 1.0) for control and hyposalivation, respectively. No statistical difference was found between groups for any variable. The results indicated that hyposalivation did not affect masticatory performance or mandibular movements during speech.

Electromyographic evaluation of mastication and swallowing in elderly individuals with mandibular fixed implant-supported prostheses

Berretin-Felix, Giédre; Nary Filho, Hugo; Padovani, Carlos Roberto; Trindade Junior, Alceu Sergio; Machado, Wellington Monteiro
Fonte: Universidade de São Paulo. Faculdade de Odontologia de Bauru Publicador: Universidade de São Paulo. Faculdade de Odontologia de Bauru
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; Formato: application/pdf
Publicado em 01/04/2008 Português
Relevância na Pesquisa
37.12%
This study evaluated the effect of implant-supported oral rehabilitation in the mandible on the electromyographic activity during mastication and swallowing in edentulous elderly individuals. Fifteen patients aged more than 60 years were evaluated, being 10 females and 5 males. All patients were edentulous, wore removable complete dentures on both dental arches, and had the mandibular dentures replaced by implant-supported prostheses. All patients were submitted to electromyographic evaluation of the masseter, superior orbicularis oris muscles, and the submental muscles, before surgery and 3, 6 and 18 months postoperatively, using foods of different textures. The results obtained at the different periods were analyzed statistically by Kruskal-Wallis non-parametric test. Statistical analysis showed that only the masseter muscle had a significant loss in electromyographic activity (p

Função mastigatória em pacientes com disfunção temporomandibular: avaliação eletromiográfica; Masticatory function in temporomandibular dysfunction patients: electromyographic evaluation

Berretin-Felix, Giédre; Genaro, Katia Flores; Trindade, Inge Elly Kiemle; Trindade Júnior, Alceu Sergio
Fonte: Universidade de São Paulo. Faculdade de Odontologia de Bauru Publicador: Universidade de São Paulo. Faculdade de Odontologia de Bauru
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; Formato: application/pdf
Publicado em 01/12/2005 Português
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A disfunção temporomandibular (DTM) representa um quadro complexo que envolve os músculos mastigatórios e/ou a articulação temporomandibular, causando prejuízos à função mastigatória. Este estudo avaliou a atividade eletromiográfica do músculo masseter durante a mastigação habitual de pão, maçã, banana, castanha de caju e folha de parafilme (Parafilm M) em 25 indivíduos adultos, de ambos os gêneros, com DTM. Os resultados foram comparados com os obtidos para o grupo controle, composto por 15 indivíduos adultos, de ambos os gêneros, livres de sinais e/ou sintomas de DTM. Foi utilizado o programa computadorizado MYO-TRONICS Inc., K6-I no modo de processamento eletromiográfico, tendo sido analisados os seguintes parâmetros: duração do ato, duração do ciclo mastigatório e número de ciclos mastigatórios. Não foram encontradas diferenças estatisticamente significantes entre os indivíduos do grupo controle e com DTM no que diz respeito à duração do ato e do ciclo mastigatório, bem como o número de ciclos, considerando todos os materiais utlizados para a mastigação. A duração do ato e do ciclo mastigatório foi maior durante a mastigação de parafilme em ambos os grupos. O número de ciclos mastigatórios foi maior para a mastigação de maçã...

; Electromyography assessment of chewing induced fatigue in temporomandibular disorders patients – a pilot study

Mendonça, Regiane Cristina; Oliveira, Anamaria Siriani; Pedroni, Cristiane Rodrigues; Bérzin, Fausto; Gastaldi, Ada Clarice
Fonte: UNICAMP/FOP Publicador: UNICAMP/FOP
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ;
Publicado em 19/11/2015 Português
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; The purpose of this study was to evaluate the endurance time, pain and discomfort intensities, the RMS and median frequency (Fmed) in the induced fatigue by prolonged gum mastication in control and temporomandibular disorders (TMD) groups. This study evaluated 8 healthy and 11 TMD patient women (mean age 27±6 years). Each gum (18x17x4mm, weight 245mg) was put on both sides of the dental arc. The metronome set at 80 bpm indicated chewing rate. Endurance time corresponded to time ranging from beginning of mastication to the subject fatigue. Pain and discomfort intensities were evaluated by visual analogue scale (VAS) obtained after and before the prolonged gum mastication. Surface EMG was recorded from the anterior temporalis and masseter muscles using surface differential electrodes (silvers bars 10mm apart, 10mm long, 2mm wide, gain of 100x, input impedance of 10GÙ and CMRR of 130dB). The EMG signals were analogically amplified with gain of 50x, filtered (10-1500Hz bandpass) and sampled by 12 bits A/D covert board with a 2KHz frequency. The signals were digitally band-pass filtered (10-500Hz). The RMS and Fmed (PSD, FFT, 250 ms, 1024 points, Hanning window processing) were obtained from masticatory cycles in 250ms windows determined visually considering the most stable epoch. The maximal clenching RMS values were used to normalize masticatory cycles EMG amplitude. The first masticatory cycle Fmed values were used to normalize EMG frequency of masticatory cycle remains. There were no significant differences among the values of RMS and Fmed during the prolonged gum mastication (p>0.05...