Influence of Breathing Modes and Facial Growth Patterns on Electromyographic Fatigue of Masticatory Muscles in Children.

Introduction Changes in breathing patterns affect the harmonious development of the structures of the craniofacial system, leading to changes in posture, occlusion, and facial growth patterns. However, little is known about how these changes influence the muscle contraction patterns, either at rest or while functioning, and either in a normal or unbalanced condition. Objective To study the masseter and anterior temporal muscles fatigue during mastication in nasal- and mouth-breathing children, also considering their facial growth patterns. Methods: A total of 70 children aged 6 to 12 years old who met the study criteria were assessed. Speech-language-hearing, otorhinolaryngologic, and cephalometric assessments were performed to divide them into groups. In the electromyographic assessment, the children were asked to chew gum following a metronome until they felt fatigued. The median frequency of the muscles was analyzed at 15, 30, 45, and 60 seconds of mastication. The reported time of fatigue perception was recorded. The data were analyzed with analysis of variance (ANOVA) and the Kruskal-Wallis and the Mann-Whitney U tests. Results There were no median frequency decrease patterns nor differences in the myoelectric manifestations and reported time of fatigue between the groups. Conclusion The masticatory muscles did not reveal fatigue in the electromyographic analysis; however, the fatigue time was reported, despite the absence of physiological fatigue. The breathing mode, the facial growth pattern, and the association between them did not interfere with the behavior of the median frequency of the electromyographic signal and the fatigue time perception.

Influence of Breathing Modes and Facial Growth Patterns on Electromyographic Fatigue of Masticatory Muscles in Children

Abstract Introduction Changes in breathing patterns affect the harmonious development of the structures of the craniofacial system, leading to changes in posture, occlusion, and facial growth patterns. However, little is known about how these changes influence the muscle contraction patterns, either at rest or while functioning, and either in a normal or unbalanced condition. Objective To study the masseter and anterior temporal muscles fatigue during mastication in nasal- and mouth-breathing children, also considering their facial growth patterns. Methods: A total of 70 children aged 6 to 12 years old who met the study criteria were assessed. Speech-language-hearing, otorhinolaryngologic, and cephalometric assessments were performed to divide them into groups. In the electromyographic assessment, the children were asked to chew gum following a metronome until they felt fatigued. The median frequency of the muscles was analyzed at 15, 30, 45, and 60seconds of mastication.The reported time of fatigue perception was recorded. The data were analyzed with analysis of variance (ANOVA) and the Kruskal-Wallis and the Mann-Whitney U tests. Results There were no median frequency decrease patterns nor differences in the myoelectric manifestations and reported time of fatigue between the groups. Conclusion The masticatory muscles did not reveal fatigue in the electromyographic analysis; however, the fatigue time was reported, despite the absence of physiological fatigue. The breathing mode, the facial growth pattern, and the association between them did not interfere with the behavior of the median frequency of the electromyographic signal and the fatigue time perception.

Nasal patency and otorhinolaryngologic-orofacial features in children / Patência nasal e características otorrinolaringológicas e orofaciais em crianças

Abstract Introduction: Nasal obstruction is a common symptom in childhood, related to rhinitis and pharyngeal tonsil hypertrophy. In the presence of nasal obstruction, nasal patency may be reduced, and nasal breathing is replaced by mouth breathing. Orofacial and otorhinolaryngologic changes are related to this breathing mode. Objective evaluation of upper airways may be obtained through nasal patency measurement. Objective: To compare nasal patency and otorhinolaryngologic-orofacial features in children. Methods: One hundred and twenty three children, 6-12 year-old, and of both sexes underwent speech therapy evaluation, according to Orofacial Myofunctional Evaluation protocol, clinical and endoscopic otorhinolaryngologic examination and nasal patency measurement, using the absolute and predicted (%) peak nasal inspiratory flow values. Results: Lower values of absolute and estimated peak nasal inspiratory flow values were found in children with restless sleep (p = 0.006 and p = 0.002), nasal obstruction report (p = 0.027 and p = 0.023), runny nose (p = 0.004 and p = 0.012), unsystematic lip closure during mastication (p = 0.040 and p = 0.026), masticatory speed reduced (p = 0.006 and p = 0.008) and altered solid food swallowing (p = 0.006 and p = 0.001). Absolute peak nasal inspiratory flow was lower in children with pale inferior turbinate (p = 0.040), reduced hard palate width (p = 0.037) and altered speech (p = 0.004). Higher absolute values were found in children with increased tongue width (p = 0.027) and, higher absolute and predicted (%) in children with mild everted lip (p = 0.008 and p = 0.000). Conclusions: Nasal patency was lower in children with restless sleep, rhinitis signs and symptoms, hard palate width reduced and with changes in mastication, deglutition and speech functions. It is also emphasized that most of the children presented signs and symptom of allergic rhinitis.

Resumo Introdução: A obstrução nasal é um sintoma comum na infância relacionado a rinite e hipertrofia das tonsilas faríngeas. Na presença de obstrução nasal, a patência nasal pode estar reduzida e a respiração nasal ser substituída por respiração oral. Alterações orofaciais e otorrinolaringológicas estão relacionadas a esse modo de respiração. A avaliação objetiva das vias aéreas superiores pode ser obtida através da medida da patência nasal. Objetivo: Comparar a patência nasal e características otorrinolaringológicas e orofaciais em crianças. Método: Foram submetidas 123 crianças de seis a 12 anos, de ambos os sexos, a avaliação fonoaudiológica, de acordo com o protocolo de avaliação Miofuncional Orofacial, exame clínico e endoscópico otorrinolaringológico e medição da patência nasal, com o uso do pico de fluxo inspiratório nasal em valores absolutos e valores estimados (% pico de fluxo inspiratório nasal). Resultados: Valores mais baixos de pico de fluxo inspiratório nasal e % pico de fluxo inspiratório nasal foram encontrados em crianças com sono agitado (p = 0,006 e p = 0,002), relato de obstrução nasal (p = 0,027 e p = 0,023), rinorreia (p = 0,004 e p = 0,012), fechamento não sistemático dos lábios durante a mastigação (p = 0,040 e p = 0,026), velocidade mastigatória reduzida (p = 0,006 e p = 0,008) e alteração da ingestão de alimentos sólidos (p = 0,006 e p = 0,001). O pico de fluxo inspiratório nasal foi menor em crianças com conchas inferiores pálidas (p = 0,040), redução da largura do palato duro (p = 0,037) e alterações da fala (p = 0,004). Valores maiores foram encontrados em crianças com largura da língua aumentada (p = 0,027). Valores maiores de pico de fluxo inspiratório nasal e % de pico de fluxo inspiratório nasal foram observados em crianças com lábio levemente evertido (p = 0,008 e p = 0,000). Conclusões: A patência nasal foi menor em crianças com sono agitado, sinais e sintomas de rinite, redução da largura do palato duro e alterações nas funções de mastigação, deglutição e fala. Enfatiza-se também que a maioria das crianças apresentava sinais e sintomas de rinite alérgica.

Nasal patency and otorhinolaryngologic-orofacial features in children.

INTRODUCTION: Nasal obstruction is a common symptom in childhood, related to rhinitis and pharyngeal tonsil hypertrophy. In the presence of nasal obstruction, nasal patency may be reduced, and nasal breathing is replaced by mouth breathing. Orofacial and otorhinolaryngologic changes are related to this breathing mode. Objective evaluation of upper airways may be obtained through nasal patency measurement. OBJECTIVE: To compare nasal patency and otorhinolaryngologic-orofacial features in children. METHODS: One hundred and twenty three children, 6-12 year-old, and of both sexes underwent speech therapy evaluation, according to Orofacial Myofunctional Evaluation protocol, clinical and endoscopic otorhinolaryngologic examination and nasal patency measurement, using the absolute and predicted (%) peak nasal inspiratory flow values. RESULTS: Lower values of absolute and estimated peak nasal inspiratory flow values were found in children with restless sleep (p=0.006 and p=0.002), nasal obstruction report (p=0.027 and p=0.023), runny nose (p=0.004 and p=0.012), unsystematic lip closure during mastication (p=0.040 and p=0.026), masticatory speed reduced (p=0.006 and p=0.008) and altered solid food swallowing (p=0.006 and p=0.001). Absolute peak nasal inspiratory flow was lower in children with pale inferior turbinate (p=0.040), reduced hard palate width (p=0.037) and altered speech (p=0.004). Higher absolute values were found in children with increased tongue width (p=0.027) and, higher absolute and predicted (%) in children with mild everted lip (p=0.008 and p=0.000). CONCLUSIONS: Nasal patency was lower in children with restless sleep, rhinitis signs and symptoms, hard palate width reduced and with changes in mastication, deglutition and speech functions. It is also emphasized that most of the children presented signs and symptom of allergic rhinitis.

Variables associated with mouth breathing diagnosis in children based on a multidisciplinary assessment.

PURPOSE: : This study was conducted to identify variables associated with mouth breathing diagnosis in children, based on multidisciplinary domains. METHODS: 119 children, six to 12 years old, underwent anamnesis, speech therapy (orofacial structures and stomatognathic functions), otorhinolaryngologic (OTRL) with clinical and endoscopic examinations, dental (occlusion) and physiotherapy (body posture and nasal patency) assessments. Nasal patency was evaluated using Peak Nasal Inspiratory Flow (PNIF) and the Nasal Obstruction Symptom Evaluation (NOSE) scale. A multiple logistic regression was performed considering breathing mode as the dependent variable and the co-variables from each multidisciplinary assessment as associated variables. RESULTS: Association with MB diagnosis was found in each professional domain with: nasal obstruction report (Odds ratio - OR=5.55), time of pacifier use (OR=1.25), convex facial type (OR=3.78), obtuse nasal angle (OR=4.30), half-open or open lip posture (OR=4.13), tongue position on the mouth floor (OR=5.88), reduced hard palate width (OR=2.99), unexpected contraction during mastication (OR=2.97), obstructive pharyngeal tonsils (OR=8.37), Angle Class II malocclusion (OR=10.85) and regular gingival maintenance (OR=2.89). CONCLUSION: We concluded that a multidisciplinary diagnosis is important, given that each evaluation domain, including OTRL, dental and speech therapy, presented variables associated with MB diagnosis. Body posture and nasal patency variables were not associated with MB.

Comparação da função ventilatória e da atividade elétrica dos músculos inspiratórios acessórios entre adultos jovens com respiração nasal e oral / Comparison of ventilatory function and electrical activity of the accessory inspiratory muscles in young adults with nasal and mouth breathing

Objetivo: Avaliar a função ventilatória, o pico de fluxo inspiratório nasal, as pressões respiratórias máximas, a atividade elétrica dos músculos inspiratórios acessórios e a relação entre as variáveis, em adultos com respiração oral (RO), comparando-os com adultos com respiração nasal (RN). Métodos: Estudo transversal, controlado com 77 participantes, entre 18 e 30 anos, ambos os sexos, distribuídos em Grupo RO (n = 38) e RN (n = 39). Foram avaliados por espirometria, manovacuometria, para obtenção da Pressão Inspiratória Máxima (PImáx) e Pressão Expiratória Máxima (PEmáx); medida do pico de fluxo inspiratório nasal (PFIN) e eletromiografia de superfície (EMG) dos músculos esternocleidomastoideo (ECM) e trapézio superior durante testes de PImáx e PFIN. Resultados: O grupo RO apresentou valores significativamente menores de PImáx (91 versus 100%), PEmáx (91,6 versus 102,6%) e PFIN (121,4 versus 147,7 l/min). Houve diferença (p < 0,01) na atividade EMG do ECM, com valores menores no grupo RO. A PImáx se correlacionou com o PFIN (r = 0,48, p < 0,01). Conclusão: Os RO apresentaram menores valores de PFIN, PImáx, PEmáx e de amplitude da atividade EMG dos músculos inspiratórios acessórios durante inspirações rápidas, quando comparados aos RN. Traz como contribuição para a prática clínica, a importância de uma investigação global do modo respiratório, não envolvendo apenas intervenções médicas, ortodônticas e miofuncionais, mas também os aspectos ventilatórios e musculares, sobre os quais se identificou a influência da RO. (AU)

Objective: To evaluate the ventilatory function, peak nasal inspiratory flow, respiratory muscle strength, electrical activity of the accessory inspiratory muscles and the relationship between the variables comparing mouth (MB) and nasal-breathing (NB) adults. Methods: Consisted in a cross-sectional, controlled study with 77 participants, between 18 and 30 years old, both sexes, distributed into MB (n=38) and NB (n=39) group. They were assessed by manovacuometry, for acquisition of the Maximal Inspiratory Pressure (MIP) and Maximal Expiratory Pressure (MEP) measures; peak nasal inspiratory flow meter (PNIF) and, surface electromyography (sEMG) of the of the sternocleidomastoid (ECM) and upper trapezius muscles, during MIP and PNIF. Results: The MB group presented values significantly lower on the MIP (91 versus 100%), MEP (91.6 versus 102.6%) and PNIF (121.4 versus 147.7 l/min). There was difference (p<0.01) in the ECM muscle activity, with lower values in the MB group. The MIP measure correlated to the PNIF (r=0.48, p<0.01). Conclusion: The adults MB presented smaller values of PNIF, MIP, MEP, and EMG amplitude of accessory inspiratory muscles during fast inspiration when compared to the NB. As a contribution to clinical practice, the importance of a global investigation of the respiratory mode, involving not only medical, orthodontic and myofunctional interventions, but also the ventilatory and muscular aspects, on which the influence of RO was identified. (AU)

Variables associated with mouth breathing diagnosis in children based on a multidisciplinary assessment / Variáveis associadas ao diagnóstico de respiração oral baseado em uma avaliação multidisciplinar

ABSTRACT Purpose : This study was conducted to identify variables associated with mouth breathing diagnosis in children, based on multidisciplinary domains. Methods 119 children, six to 12 years old, underwent anamnesis, speech therapy (orofacial structures and stomatognathic functions), otorhinolaryngologic (OTRL) with clinical and endoscopic examinations, dental (occlusion) and physiotherapy (body posture and nasal patency) assessments. Nasal patency was evaluated using Peak Nasal Inspiratory Flow (PNIF) and the Nasal Obstruction Symptom Evaluation (NOSE) scale. A multiple logistic regression was performed considering breathing mode as the dependent variable and the co-variables from each multidisciplinary assessment as associated variables. Results Association with MB diagnosis was found in each professional domain with: nasal obstruction report (Odds ratio - OR=5.55), time of pacifier use (OR=1.25), convex facial type (OR=3.78), obtuse nasal angle (OR=4.30), half-open or open lip posture (OR=4.13), tongue position on the mouth floor (OR=5.88), reduced hard palate width (OR=2.99), unexpected contraction during mastication (OR=2.97), obstructive pharyngeal tonsils (OR=8.37), Angle Class II malocclusion (OR=10.85) and regular gingival maintenance (OR=2.89). Conclusion We concluded that a multidisciplinary diagnosis is important, given that each evaluation domain, including OTRL, dental and speech therapy, presented variables associated with MB diagnosis. Body posture and nasal patency variables were not associated with MB.

RESUMO Objetivo Este estudo foi conduzido para identificar as variáveis associadas ao diagnóstico de respiração oral em crianças, baseado nos domínios multidisciplinares. Método Cento e dezenove crianças, de seis a 12 anos, realizaram uma avaliação abrangente composta por uma anamnese e exames fonoaudiológico (estruturas orofaciais e funções estomatognáticas), otorrinolaringológico (avaliação clínica e endoscópica), odontológico (conservação oral e oclusão) e fisioterapêutico (postura corporal e permeabilidade nasal). A permeabilidade nasal foi aferida utilizando-se o Pico de Fluxo Inspiratório Nasal (PFIN) e a escala NOSE (Nasal Obstruction Symptom Evaluation). Foi realizada uma regressão logística múltipla, considerando o modo respiratório como variável dependente e as covariáveis de cada avaliação multidisciplinar como variáveis associadas. Resultados Foi encontrada uma associação do diagnóstico de respiração oral com variáveis de cada domínio profissional: relato de obstrução nasal (Odds ratio - OR=5,55), tempo de uso de chupeta (OR=1,25), tipo facial convexo (OR=3,78), ângulo nasolabial obtuso (OR=4,30), postura de lábios entreabertos e abertos (OR=4,13), postura de língua no assoalho oral (OR=5,88), largura do palato duro reduzida (OR=2,99), contrações inesperadas durante a mastigação (OR=2,97), tonsilas faríngeas obstrutivas (OR=8,37), má oclusão classe II de Angle (OR=10,85) e estado gengival regular (OR=2,89). Conclusão Concluiu-se que o diagnóstico multidisciplinar é importante, uma vez que as avaliações dos domínios fonoaudiológico, otorrinolaringológico e odontológico obtiveram variáveis associadas ao diagnóstico de respiração oral. As variáveis relacionadas à postura corporal e permeabilidade nasal não foram associadas ao diagnóstico de respiração oral.

Nasal patency and craniocervical posture in scholar children / Patência nasal e postura craniocervical em crianças em idade escolar / Permeabilidad nasal y postura craneocervical en niños escolares

ABSTRACT Changes in head posture have been observed as a compensatory mechanism for the nasal airflow impairment. This study aimed to compare the craniocervical posture between children with normal and decreased nasal patency and correlate nasal patency with craniocervical posture. Children aging from six to twelve years went through nasal patency and craniocervical assessments. The biophotogrammetric measures of craniocervical posture used were Cervical Distance (CD), Head Horizontal Alignment (HHA) and Flexion-Extension Head Position (FE), evaluated by SAPO software (v.0.68). Nasal patency was measured using Peak Nasal Inspiratory Flow meter (PNIF) and Nasal Obstruction Symptom Evaluation (NOSE) scale. One hundred thirty-three children were distributed into two groups: G1 (normal nasal patency - PNIF higher than 80% of predicted value) with 90 children; G2 (decreased nasal patency - PNIF lower than 80% of predicted value) with 43 children. Differences between groups were not found in CD and HHA measures. FE was significantly higher in G2 than G1 (p=0.023). Negative weak correlation between FE and %PNIF (r=-0.266; p=0.002) and positive weak correlation between CD and PNIF (r=0.209; p=0.016) were found. NOSE scores negatively correlated with PNIF (r=-0.179; p=0.039). Children with decreased nasal patency presented greater head extension. This postural deviation is prone to increase as nasal airflow decreases, thus indicating the relationship between craniocervical posture and nasal patency. Lower values of PNIF reflected on additional problems caused by nasal obstruction symptoms.

RESUMO Mudanças na postura da cabeça têm sido observadas como um mecanismo de compensação para a perda de fluxo de ar nasal. Este estudo teve como objetivo comparar a postura craniocervical entre crianças com patência nasal normal e reduzida e patência nasal correlacionada com postura craniocervical. Crianças de seis a doze anos passaram por avaliações de patência nasal e craniocervical. As medidas biofotogramétricas de postura craniocervical utilizadas foram distância cervical (CD), alinhamento horizontal cabeça (HHA) e flexo-extensão da cabeça (FE), avaliadas pelo software SAPO (v.0.68). A patência nasal foi medida utilizando o medidor de pico de fluxo inspiratório nasal (PNIF) e escala de avaliação dos sintomas de obstrução nasal (NOSE). Cento trinta e três crianças foram distribuídas em dois grupos: G1 (patência nasal normal - PNIF superior a 80% do valor previsto) com 90 crianças; G2 (patência nasal reduzida - PNIF menor que 80% do valor previsto) com 43 crianças. Não foram encontradas diferenças entre os grupos nas medidas CD e HHA. FE foi significativamente superior em G2 do que em G1 (p=0,023). Foram encontradas fraca correlação negativa entre FE e %PNIF (r=-0,266; p = 0,002) e fraca correlação positiva entre CD e PNIF (r=0,209; p=0,016). A contagem NOSE foi negativamente correlacionada com o PNIF (r =-0,179; p=0,039). Crianças com patência nasal reduzida apresentaram maior extensão de cabeça. Este desvio postural é propenso a aumentar à medida que o fluxo de ar nasal diminui, o que indica a relação entre postura craniocervical e patência nasal. Valores mais baixos de PNIF refletem sobre problemas adicionais causados por sintomas de obstrução nasal.

RESUMEN Los cambios en la postura de la cabeza se han observado como un mecanismo de compensación para el deterioro del flujo de aire nasal. Este estudio tuvo como objetivo comparar la postura craneocervical entre los niños con la permeabilidad nasal normal y reducida y correlacionar la permeabilidad nasal con la postura craneocervical. Los niños de seis a doce años pasaron por evaluaciones de permeabilidad nasal y craneocervicales. Las medidas fotogramétricas de la postura craneocervical utilizadas fueron Distancia cervical (CD), Alineación horizontal de la cabeza (HHA) y Flexión-Extensión de la posición de la cabeza (FE), evaluadas por el software SAPO (v.0.68). La permeabilidad nasal se midió utilizando Medidor de Flujo Máximo Inspiratorio Nasal (MFMI) y la escala Evaluación de Síntomas de Obstrucción Nasal (ESON). Ciento treinta y tres niños fueron distribuidos en dos grupos: G1 (permeabilidad nasal normal - PNIF superior a 80% del valor predicho) con 90 niños; G2 (la disminución de la permeabilidad nasal - PNIF inferior a 80% del valor predicho) con 43 niños. No se encontraron diferencias entre grupos en las medidas CD y HHA. FE fue significativamente mayor en G2 que en G1 (p=0.023). Se encontraron correlación negativa y débil entre FE y %PNIF (r=-0.266; p=0.002) y correlación positiva y débil entre CD y PNIF (r=0.209; p=0.016). Las puntuaciones del NOSE fueron negativamente correlacionadas con PNIF (r=-0.179; p=0.039). Los niños con baja permeabilidad nasal presentaron una mayor extensión de la cabeza. Esta desviación postural propicia la probabilidad de la disminución del flujo de aire nasal, por lo tanto indica la relación entre la postura craneocervical y la permeabilidad nasal. Valores bajos del PNIF se reflejan en los problemas adicionales causados por síntomas de obstrucción nasal.

Study of the kinematic variables of unilateral and habitual mastication of healthy individuals. / Estudo das variáveis cinemáticas da mastigação unilateral e habitual de indivíduos saudáveis.

PURPOSE: To describe and compare the temporal-spatial kinematic variables of mandibular movement during deliberate unilateral and habitual mastication in healthy young-adult individuals. METHODS: The study sample was composed of eight male healthy volunteers aged 19 to 24 years. The kinematic data were obtained using a motion analysis system - Qualisys Track Manager (QTM) ProReflex MCU. Recordings were performed during deliberate unilateral mastication (UM) and habitual mastication (HM) of firm-consistency gummy candy. The following variables were analyzed: (1) masticatory sequence: duration, number of masticatory cycles, and chewing rate; (2) masticatory cycle: duration, vertical and medial-lateral mandibular range of motion in relation to the skull, and maximum velocity during the opening and closing phases. Data of the variables were compared during UM and HM by the paired t test, and the effect sizes ('d' Cohen) were calculated. RESULTS: Regarding the variables of the masticatory sequence, smaller chewing rate was observed for UM compared with that for HM (1.19±0.21Hz and 1.29±0.16Hz, respectively, p=0.004, d=0.53). Smaller values of maximum velocity during the opening (MU=67.4 mm/s and MH=80.02, p=0.053, d=0.80) and closing (MU=71.77±9.35mm/s and MH=3.51±7mm/s, p=0.014, d=0.79) phases of the masticatory cycle were observed in deliberate unilateral mastication compared with those in habitual mastication. CONCLUSION: Kinematic variables associated with the sequence and cycle of mastication are influenced by the chewing pattern adopted - deliberate unilateral or habitual.

Body posture and pulmonary function in mouth and nose breathing children: cross-sectional study / Postura corporal e função pulmonar em crianças respiradoras orais e nasais: estudo transversal

Abstract Introduction: Mouth breathing can lead to changes in body posture and pulmonary function. However, the consequences are still inconclusive and a number of studies are controversial. Objective: Evaluate and correlate spirometric parameters and postural measures in mouth breathing children, and compare them to nose breathers. Methods: two groups of 6 to 12 year-old children were evaluated: mouth breathers (MB, n = 55) and nose breathers (NB, n = 45). Spirometry and body posture analysis using photogrammetry (SAPo 0.68® v) were carried out. The following spirometric measures were evaluated: peak expiratory flow (PEF), forced expiratory volume in 1 second (FEV1), forced vital capacity (FVC), FEV1/FVC ratio (%) and forced expiratory flow between 25% and 75% of FVC (FEF 25-75%). Biophotogrammetric measures analyzed were: horizontal alignment of acromions (HAA) and anterior superior iliac spine (HAASIS), Charpy angle, horizontal alignment of the head (HAH), cervical lordosis (CL), thoracic kyphosis (TK), lumbar lordosis (LL), cervical distance (CD) and lumbar distance (LD). Results: There were no intergroup differences in spirometric and postural variables. Positive and moderate correlations were found between CL and CD measures with PEF, FEV1, FVC and FEF 25-75%, while weak correlations were observed between lumbar lordosis and PEF, FEV1 and FVC. Conclusion: The breathing mode had no influence on postural and respiratory measures. However, greater forward head posture, with smaller cervical lordosis, was related to higher lung volumes and flows in both groups.

Resumo Introdução: A respiração oral pode levar a alterações na postura corporal e na função pulmonar. Entretanto, tais implicações ainda são inconclusivas e alguns estudos são controversos. Objetivo: avaliar e correlacionar parâmetros espirométricos e medidas posturais em crianças respiradoras orais, comparando-as com respiradores nasais. Métodos: foram avaliadas crianças de 6 a 12 anos que compuseram os grupos: respiradores orais (RO, n = 55) e nasais (RN, n = 45). Foram realizadas espirometria e análise da postura corporal, por meio de biofotogrametria (SAPo v 0.68®). As medidas de espirometria utilizadas foram: pico de fluxo expiratório (PFE), volume expiratório forçado no primeiro segundo (VEF1), capacidade vital forçada (CVF), relação VEF1/CVF (%) e fluxo expiratório forçado entre 25% e 75% da CVF (FEF25-75%). As medidas biofotogramétricas analisadas foram: alinhamento horizontal dos acrômios (AHA) e das espinhas ilíacas ântero-superiores (AHEIAS), ângulo de Charpy, alinhamento horizontal da cabeça (AHC), lordose cervical (LC), cifose torácica (CT), lordose lombar (LL), distância cervical (DC) e distância lombar (DL). Resultados: Não houve diferença entre os grupos nas variáveis espirométricas e posturais. Foram encontradas correlações positivas e moderadas entre as medidas posturais LC e DC e as medidas de PFE, VEF1, CVF e FEF25-75%. Ainda, correlações fracas entre DL e PFE, VEF1 e CVF foram encontradas. Conclusão: Na amostra estudada, o modo respiratório não gerou influência nas medidas posturais e respiratórias. Porém, a maior projeção anterior da cabeça com menor lordose cervical se relacionou com maiores volumes e fluxos pulmonares, em ambos os grupos.

Estudo das variáveis cinemáticas da mastigação unilateral e habitual de indivíduos saudáveis / Study of the kinematic variables of unilateral and habitual mastication of healthy individuals

RESUMO Objetivo Descrever e comparar as variáveis cinemáticas temporoespaciais do movimento mandibular durante a mastigação unilateral deliberada e habitual de indivíduos saudáveis. Método Participaram do estudo 8 voluntários saudáveis, do gênero masculino, com faixa etária entre 19 e 24 anos. Os dados cinemáticos foram obtidos através do sistema de análise de movimento Qualysis (QTM - Qualisys Track Manager). Foram realizados registros de mastigação unilateral direita (MU) e habitual (MH) de bala de goma de gelatina de consistência firme. Foram analisadas variáveis relacionadas à (1) sequência mastigatória (duração, número de ciclos e frequência mastigatória); (2) ciclo mastigatório: duração do ciclo mastigatório, amplitude de movimento mandibular vertical e médio-lateral durante o ciclo mastigatório, velocidade máxima durante as fases de abertura e fechamento. A comparação das variáveis durante a MU e MH foi realizada por meio do teste t pareado (p<0,05) e os tamanhos de efeito (‘d’ de Cohen) foram calculados. Resultados Em relação à sequência mastigatória, observou-se menor frequência mastigatória durante MU comparada à MH (1,19±0,21 e 1,29±0,16Hz, respectivamente, p=0,004, d=0,53) e menores velocidades máximas de abertura (MU=67,4 mm/s e MH=80,02; p=0,053; d=0,80) e fechamento (MU=71,77±9,35mm/s e MH=83,51±17 mm/s, p=0,014, d=0,79) do ciclo mastigatório. Conclusão As variáveis cinemáticas relacionadas à sequência e ao ciclo mastigatório foram influenciadas pelo padrão mastigatório adotado – unilateral ou habitual.

ABSTRACT Purpose To describe and compare the temporal-spatial kinematic variables of mandibular movement during deliberate unilateral and habitual mastication in healthy young-adult individuals. Methods The study sample was composed of eight male healthy volunteers aged 19 to 24 years. The kinematic data were obtained using a motion analysis system - Qualisys Track Manager (QTM) ProReflex MCU. Recordings were performed during deliberate unilateral mastication (UM) and habitual mastication (HM) of firm-consistency gummy candy. The following variables were analyzed: (1) masticatory sequence: duration, number of masticatory cycles, and chewing rate; (2) masticatory cycle: duration, vertical and medial-lateral mandibular range of motion in relation to the skull, and maximum velocity during the opening and closing phases. Data of the variables were compared during UM and HM by the paired t test, and the effect sizes ('d' Cohen) were calculated. Results Regarding the variables of the masticatory sequence, smaller chewing rate was observed for UM compared with that for HM (1.19±0.21Hz and 1.29±0.16Hz, respectively, p=0.004, d=0.53). Smaller values of maximum velocity during the opening (MU=67.4 mm/s and MH=80.02, p=0.053, d=0.80) and closing (MU=71.77±9.35mm/s and MH=3.51±7mm/s, p=0.014, d=0.79) phases of the masticatory cycle were observed in deliberate unilateral mastication compared with those in habitual mastication. Conclusion Kinematic variables associated with the sequence and cycle of mastication are influenced by the chewing pattern adopted - deliberate unilateral or habitual.

Influence of generalized joint hypermobility on temporomandibular joint and dental occlusion: a cross-sectional study. / Influência da hipermobilidade articular generalizada sobre a articulação temporomandibular e a oclusão dentária: estudo transversal.

PURPOSE: To evaluate the dental occlusion and temporomandibular joint in women with and without generalized joint hypermobility. METHODS: Generalized joint hypermobility was assessed by the Beighton score. Individuals were divided into two groups: with and without hypermobility. The Research Diagnostic Criteria for Temporomandibular Disorders was used to evaluate the temporomandibular joint. Dental occlusion was assessed according to Angle classification, overjet and overbite measures, presence of open bite or crossbite, pattern of disocclusion, and occlusal interference. RESULTS: Forty-three women participated voluntarily in the study: 17 in the group with hypermobility and 26 in the group without hypermobility. The frequencies of joint noise and deviation during mouth opening were greater in the hypermobility group (52.9% vs. 38.5% and 76.5% vs. 50%, respectively), but without statistical significance. None of the volunteers presented ideal occlusion and no significant difference was found in Angle Class between the groups. The hypermobility group presented a higher percentage of changes in occlusion (29.4% of overbite, 47.1% of overjet, and 17.6% of crossbite), with crossbite showing statistical difference between the groups. CONCLUSION: Hypermobility does not influence occlusion and range of mandibular motion in the women assessed. Nevertheless, the higher percentage of articular noise and uncorrected deviation during mouth opening shown by the group with hypermobility, even without statistical difference, may constitute evidence of correlation between hypermobility and temporomandibular disorder.

Experimentally induced masseter-pain changes masseter but not sternocleidomastoid muscle-related activity during mastication.

The aim of this study was to verify the effects of induced masseter-muscle pain on the amplitude of muscle activation, symmetry and coactivation of jaw- and neck-muscles during mastication. Twenty-eight male volunteers, mean age±SD 20.6±2.0years, participated in this study. Surface electromyography of the masseter and sternocleidomastoid (SCM) muscles was performed bilaterally during mastication of a gummy candy before and after injections of monosodium glutamate solution and isotonic saline solution. As a result, we observed a decrease in the amplitude of activation of the masseter muscle on the working side (p=0.009; d=0.34) and a reduction in the asymmetry between the working and the balancing side during mastication (p=0.007; d=0.38). No changes were observed either on the craniocervical electromyographic variables. In conclusion, experimentally induced pain reduced the masseter muscle activation on the working side, thereby reducing the physiological masseters' recruitment asymmetry between the two sides during mastication. No effects on SCM activity were detected. These results may partly explain the initial maladaptative changes underlying TMD conditions.

Influência da hipermobilidade articular generalizada sobre a articulação temporomandibular e a oclusão dentária: estudo transversal / Influence of generalized joint hypermobility on temporomandibular joint and dental occlusion: a cross-sectional study

RESUMO Objetivo Avaliar a oclusão dentária e a articulação temporomandibular de mulheres com e sem hipermobilidade articular generalizada. Método A hipermobilidade foi avaliada pelo Escore de Beighton, e as voluntárias foram distribuídas, conforme o escore obtido, em dois grupos: com e sem hipermobilidade. A articulação temporomandibular foi avaliada por meio do instrumento Critérios de Diagnóstico para Pesquisa de Desordens Temporomandibulares, e a avaliação oclusal compreendeu a classificação de Angle, presença de sobremordida, sobressaliência e mordida cruzada, padrão de desoclusão e interferências oclusais. Resultados 43 mulheres participaram voluntariamente da pesquisa, 17 no grupo com hipermobilidade e 26 no grupo sem hipermobilidade. A frequência de ruídos articulares e de desvio na abertura da boca foi maior no grupo com hipermobilidade (52,9% versus 38,5% e 76,5% versus 50%, respectivamente), sem diferença significante. Quanto à oclusão, nenhuma voluntária apresentou uma oclusão ideal e não se verificou diferença significativa na Classe de Angle entre os grupos. As alterações na oclusão obtiveram percentual maior no grupo com hipermobilidade (29,4% de sobremordida, 47,1% de sobressaliência e 17,6% de mordida cruzada), sendo que a mordida cruzada apresentou diferença estatística entre os grupos. Conclusão A hipermobilidade não influenciou a oclusão e as amplitudes de movimentos mandibulares nas mulheres avaliadas. Contudo, o maior percentual de ruídos articulares e de desvio não corrigido apresentado pelo grupo com hipermobilidade, mesmo sem diferença entre os grupos, pode constituir um indício de relação entre hipermobilidade e disfunção temporomandibular.

ABSTRACT Purpose To evaluate the dental occlusion and temporomandibular joint in women with and without generalized joint hypermobility. Methods Generalized joint hypermobility was assessed by the Beighton score. Individuals were divided into two groups: with and without hypermobility. The Research Diagnostic Criteria for Temporomandibular Disorders was used to evaluate the temporomandibular joint. Dental occlusion was assessed according to Angle classification, overjet and overbite measures, presence of open bite or crossbite, pattern of disocclusion, and occlusal interference. Results Forty-three women participated voluntarily in the study: 17 in the group with hypermobility and 26 in the group without hypermobility. The frequencies of joint noise and deviation during mouth opening were greater in the hypermobility group (52.9% vs. 38.5% and 76.5% vs. 50%, respectively), but without statistical significance. None of the volunteers presented ideal occlusion and no significant difference was found in Angle Class between the groups. The hypermobility group presented a higher percentage of changes in occlusion (29.4% of overbite, 47.1% of overjet, and 17.6% of crossbite), with crossbite showing statistical difference between the groups. Conclusion Hypermobility does not influence occlusion and range of mandibular motion in the women assessed. Nevertheless, the higher percentage of articular noise and uncorrected deviation during mouth opening shown by the group with hypermobility, even without statistical difference, may constitute evidence of correlation between hypermobility and temporomandibular disorder.

Craniocervical Posture in Patients with Obstructive Sleep Apnea

Abstract Introduction Obstructive Sleep Apnea (OSA) is characterized by repeated episodes of upper airway obstruction during sleep. Objective The objective of this study is to verify the craniofacial characteristics and craniocervical posture of OSA and healthy subjects, determining possible relationships with the apnea/hypopnea index (AHI). Methods This case-control study evaluated 21 subjects with OSA, who comprised the OSA group (OSAG), and 21 healthy subjects, who constituted the control group (CG). Cephalometry analyzed head posture measurements, craniofacial measurements, and air space. Head posture was also assessed by means of photogrammetry. Results The groups were homogeneous regarding gender (12 men and 9 women in each group), age (OSAG = 41.86 11.26 years; GC = 41.19 11.20 years), and body mass index (OSAG = 25.65 2.46 kg/m2; CG = 24.72 3.01 kg/m2). We found significant differences between the groups, with lower average pharyngeal space and greater distance between the hyoid bone and the mandibular plane in OSAG, when compared with CG. A positive correlation was found between higher head hyperextension and head anteriorization, with greater severity of OSA as assessed by AHI. Conclusion OSAG subjects showed changes in craniofacial morphology, with lower average pharyngeal space and greater distance from the hyoid bone to the mandibular plane, as compared with healthy subjects. Moreover, in OSA subjects, the greater the severity of OSA, the greater the head hyperextension and anteriorization.

Craniocervical Posture in Patients with Obstructive Sleep Apnea.

INTRODUCTION: Obstructive Sleep Apnea (OSA) is characterized by repeated episodes of upper airway obstruction during sleep. OBJECTIVE: The objective of this study is to verify the craniofacial characteristics and craniocervical posture of OSA and healthy subjects, determining possible relationships with the apnea/hypopnea index (AHI). METHODS: This case-control study evaluated 21 subjects with OSA, who comprised the OSA group (OSAG), and 21 healthy subjects, who constituted the control group (CG). Cephalometry analyzed head posture measurements, craniofacial measurements, and air space. Head posture was also assessed by means of photogrammetry. RESULTS: The groups were homogeneous regarding gender (12 men and 9 women in each group), age (OSAG = 41.86 ± 11.26 years; GC = 41.19 ± 11.20 years), and body mass index (OSAG = 25.65 ± 2.46 kg/m2; CG = 24.72 ± 3.01 kg/m2). We found significant differences between the groups, with lower average pharyngeal space and greater distance between the hyoid bone and the mandibular plane in OSAG, when compared with CG. A positive correlation was found between higher head hyperextension and head anteriorization, with greater severity of OSA as assessed by AHI. CONCLUSION: OSAG subjects showed changes in craniofacial morphology, with lower average pharyngeal space and greater distance from the hyoid bone to the mandibular plane, as compared with healthy subjects. Moreover, in OSA subjects, the greater the severity of OSA, the greater the head hyperextension and anteriorization.

Cervical-scapular muscles strength and severity of temporomandibular disorder in women with mechanical neck pain / Força dos músculos cérvico-escapulares e a severidade da disfunção temporomandibular em mulheres com cervicalgia mecânica

Abstract Introduction: Changes in cervical muscle function have been observed in patients with neck pain (NP) and TMD. However, the relationship between TMD severity and neck muscle strength in the presence/absence of NP is unknown. Objective: To determine the prevalence of TMD in women with and without mechanical NP and assess the cervical-scapular muscle strength and its association with TMD severity. Methods: Fifteen volunteers without neck pain (CG) and 14 women with mechanical neck pain (NPG) took part and were selected by the Neck Disability Index. The diagnosis and severity of TMD were determined by the Research Diagnostic Criteria for TMD and Temporomandibular Index (TI), respectively. The strength of the upper trapezius muscle, and cervical flexor and extensor muscles was measured by digital hand dynamometer. Results: 64.5% of women with NP and 33.3% without NP were diagnosed with TMD (p = 0.095). The NPG showed lower strength of the cervical flexor (p = 0.044) and extensor (p=0.006) muscles, and higher TI (p = 0.038) than in the CG. It was also verified moderate negative correlation between TI and the strength of dominant (p = 0.046, r = -0.547) and non-dominant (p = 0.007, r = -0.695) upper trapezius, and cervical flexors (p = 0.023, r = -0.606) in the NPG. Conclusion: There was no difference in the prevalence of TMD in women with and without NP. However, women with NP have lower cervical muscle strength - compared to those without NP - which was associated with greater severity of TMD. Thus, in women with NP associated with TMD, it is advisable to assess and address the severity of this dysfunction and identify the cervical-scapular muscles compromise.

Resumo Introdução: Modificações da função muscular cervical têm sido verificadas em pacientes com cervicalgia e DTM. Entretanto, ainda não é conhecida a relação entre a severidade da DTM e a força muscular cervical na presença/ausência de cervicalgia. Objetivo: Verificar a prevalência de DTM em mulheres com e sem cervicalgia mecânica, avaliar a força dos músculos cérvico-escapulares e sua associação com a severidade da DTM. Métodos: Participaram 15 voluntárias sem dor cervical (GC) e 14 mulheres com cervicalgia mecânica (GCM), selecionadas por meio do Índice de Disfunção Relacionada ao Pescoço. O diagnóstico e a gravidade da DTM foram determinados pelos Critérios diagnósticos para pesquisa em desordens temporomandibulares e Índice Temporomandibular (IT), respectivamente. A força dos músculos trapézio superior, flexores e extensores cervicais foi aferida por dinamometria digital manual. Resultados: 64,5% das mulheres com cervicalgia e 33,3% das sem dor cervical apresentaram diagnóstico de DTM (p = 0,095). O GCM apresentou menor força dos músculos flexores (p = 0,044) e extensores cervicais (p = 0,006) e maior IT (p = 0,038) que o GC. Também foi verificada correlação negativa moderada entre o IT e força dos músculos trapézio superior dominante (p = 0,046, r = -0,547), não dominante (p = 0,007, r = -0,695) e flexores cervicais (p = 0,023, r = -0,606) no GCM. Conclusão: Não houve diferença na prevalência de DTM entre mulheres com e sem cervicalgia. Entretanto, mulheres com cervicalgia apresentaram menor força muscular cervical (comparadas às sem cervicalgia) que esteve associada a maior severidade da DTM. Assim, em mulheres com cervicalgia associada à DTM, é recomendável avaliar e abordar a severidade desta disfunção e o comprometimento dos músculos cérvico-escapulares.

Relationship among perceived stress, anxiety, depression and craniocervical pain in nursing professionals under stress at work / Relação entre o estresse percebido, ansiedade, depressão e a dor craniocervical em profissionais de enfermagem sob estresse no trabalho

Abstract Introduction: The appearance and evolution of some clinical pain conditions may be influenced by stress and other psychosocial factors. Face, head and cervical muscles may increase their activity and tension in the presence of stress, leading to craniocervicomandibular pain in individuals exposed to stress. Objective: To assess the relationship among perceived stress, anxiety, depression and craniocervicomandibular pain in nursing professionals under stress at work. Materials and Methods: Forty-three women under stress at work, according to the Job Stress Scale (JSS), were assessed by the Perceived Stress Scale (PSS), the Hospital Anxiety and Depression Scale (HADS), pressure pain threshold, measured by algometry, and muscle sensitivity to hand palpation of the masticatory and cervical muscles. Results: A low moderate level of perceived stress was found in 62.79% of the sample, anxiety in 11.63% and depression in 9.30%. The psychosocial scales correlated with each other. No correlation was found between pressure pain threshold and perceived stress, anxiety and depression. The level of pain to hand palpation correlated with the perceived stress scores. Conclusion: Pressure pain threshold was not influenced by the psychosocial factors assessed. Pain intensity to hand palpation, however, was higher as the perception of stress increased.

Resumo Introdução: O aparecimento e evolução de algumas condições clínicas de dor podem ser influenciados pelo estresse e outros fatores psicossociais. A musculatura da face, cabeça e cervical podem aumentar sua atividade e tensão na presença do estresse, podendo provocar dor craniocervicomandibular nos indivíduos a ele expostos. Objetivo: Avaliar a relação entre estresse percebido, ansiedade, depressão e a dor craniocervicomandibular em profissionais da enfermagem sob estresse no trabalho. Materiais e Métodos: 43 mulheres sob estresse no trabalho, de acordo com a Escala de Estresse no Trabalho (JSS), foram avaliadas pelas Escalas de Estresse Percebido (PSS), Escala Hospitalar de Ansiedade e Depressão (HADS), limiar de dor à pressão, por algometria, e a sensibilidade muscular por palpação manual dos músculos mastigatórios e cervicais. Resultados: Nível moderado baixo de estresse percebido foi encontrado em 62,79% da amostra, ansiedade em 11,63% e depressão em 9,30%. As escalas psicossociais se correlacionaram entre si. Não houve correlação entre limiar de dor à pressão e estresse percebido, ansiedade e depressão. O nível de dor à palpação manual se correlacionou com os escores de estresse percebido. Conclusão: Os fatores psicossociais avaliados não influenciaram o limiar de dor à pressão. Entretanto, a intensidade da dor à palpação manual foi mais alta à medida que aumentou a percepção do estresse.

Disfunção temporomandibular e dor craniocervical em profissionais da área da enfermagem sob estresse no trabalho / Temporomandibular dysfunction and craniocervical pain in professionals of the nursing area under work stress

RESUMO Objetivo: verificar a presença e severidade de Disfunção Temporomandibular, presença de cefaleia e cervicalgia e o limiar de dor muscular de músculos cervicais em profissionais de enfermagem sob estresse no trabalho. Métodos: 43 mulheres foram avaliadas quanto à presença e severidade de Disfunção Temporomandibular pelo instrumento Critérios de Diagnóstico para Pesquisa de Desordem Temporomandibular e pelo Índice Temporomandibular, respectivamente. Além disso, foram avaliadas quanto ao limiar de dor à pressão nos músculos cervicais por algometria e quanto à presença de cefaleia e cervicalgia. Resultados: disfunção Temporomandibular foi encontrada em 30,23% da amostra, com valor médio de escore de gravidade de 0,52. Entre as participantes com Disfunção Temporomandibular, 69,23% apresentavam depressão, 61,64% graduação I de dor crônica e Sintomas Físicos não Específicos incluindo e excluindo itens de dor em 46,15% e 61,64%, respectivamente. Cefaleia foi referida por 55,81% e cervicalgia por 60,47%. Não houve associação entre Disfunção Temporomandibular, cefaleia e cervicalgia. Os limiares de dor dos músculos cervicais apresentaram-se baixos tanto nos indivíduos com diagnóstico de Disfunção Temporomandibular quanto nos sem este diagnóstico, sem diferença significativa. O músculo esternocleidomastóideo apresentou-se com os menores limiares de dor à pressão. Conclusão: alta incidência de Disfunção Temporomandibular, cefaleia e cervicalgia foram detectadas nesta amostra. Disfunção Temporomandibular não influenciou a presença de cefaleia e/ou cervicalgia. A alta frequência de dor cervical e os baixos limiares de dor no músculo esternocleidomastóideo em todas as participantes demonstram o comprometimento dos músculos cervicais, resultante de possíveis posturas inadequadas e tensão muscular relacionadas ao estresse.

ABSTRACT Purpose : to investigate the presence of Temporomandibular Disorder, headache and neck pain and muscle pain threshold of cervical muscles in nursing professionals exposed to occupational stress. Methods: 43 women were evaluated for the presence and severity of Temporomandibular Disorder using the Diagnostic Criteria for Temporomandibular Disorder instrument and Temporomandibular Dysfunction Index, respectively. Furthermore, they were evaluated for the pain threshold to pressure on the cervical muscles by algometry and for the presence of headache and neck pain. Results: temporomandibular Disorder was found in sample 30.23% and 0.52 was the mean score of dysfunction severity. Of the participants with Temporomandibular Disorder, there presence of depression was found in 69.23%; 61.64% Grade I in Graded Chronic Pain and Specific Physical Symptoms including pain and excluding pain were 46.15% and 61.64%, respectively. Headache was reported by 55.81% and neck pain by 60.47%. There was no association between the presence of Temporomandibular Disorder, headache and neck pain. Pain pressure thresholds of cervical muscles were low in subjects with and without Temporomandibular Disorder, without statistical difference. The sternocleidomastoid muscle it´s the lowest value of pain pressure threshold. Conclusion: high incidence of Temporomandibular Disorder, headache and neck pain were detected in the studied sample. Temporomandibular Disorder was not associated with the presence of headache and / or neck pain. The high frequency of cervical pain and low pain pressure thresholds in the sternocleidomastoid muscle in all subjects demonstrate the involvement of the cervical spine and muscles in these professionals, resulting of possible improper postures and stress-related muscle tension.

Aspectos clínicos e psicossociais avaliados por critérios de diagnóstico para disfunção temporomandibular / Clinical and psychosocial aspects assessed by the research diagnostic criteria for temporomandibular disorder

RESUMO Objetivo: analisar a associação entre a classificação de diagnósticos clínicos (dor miofascial, desordem discal e articular) e a graduação de dor crônica, depressão e sintomas físicos não específicos em sujeitos com disfunção temporomandibular. Métodos: foram incluídos 32 pacientes, com média de idade de 28,71±4,66 anos. Como instrumento de avaliação, foi utilizado o Critério de Diagnóstico para Pesquisa das Desordens Temporomandibulares - Eixo I e II. Quanto ao grupo diagnóstico, 88,13% dos indivíduos apresentaram diagnóstico misto, sendo 43,75% dos grupos I e III (distúrbios musculares e articulares) e 34,38% dos grupos I, II e III (distúrbios musculares, articulares e deslocamento de disco). Resultados: de acordo com o eixo II, 96,88% dos participantes foram classificados com dor crônica grau I e II (baixa incapacidade e baixa intensidade; baixa incapacidade e alta intensidade). Graus moderado e grave de depressão foram observados em 84,38% dos participantes. Na avaliação de sintomas físicos não específicos incluindo e excluindo dor, respectivamente, 59,38% apresentaram sintomas severos e 71,88% apresentaram sintomas moderados e severos. Verificou-se relação significante dos diagnósticos clínicos de disfunção temporomandibular com o grau de sintomas físicos não específicos incluindo dor. Conclusão: alguns aspectos clínicos e psicossociais estão associados em pacientes com disfunção temporomandibular, observando uma multiplicidade de diagnósticos clínicos com a presença de uma relação significante entre os diagnósticos clínicos encontrados e a presença de sintomas físicos inespecíficos com dor. Queixa de maior gravidade de sintomas físicos foi encontrada em pacientes com diagnóstico clínico múltiplo.

ABSTRACT Purpose: to analyze the association between the classification of clinical diagnoses (myofascial pain, disk displacement and joint disorder) and chronic pain grade, depression and non-specific physical symptoms in subjects with temporomandibular disorder. Methods: 32 patients, mean age 28.71±4.66 years, were included. The assessment tool used was the Research Diagnostic Criteria for Temporomandibular Disorders - Axis I and II. Regarding the diagnostic group, 88.13% of patients showed mixed conditions, with 43.75% from groups I and III (muscle and joint disorders) and 34.38% from groups I, II and III (muscle and joint disorders, and disk displacement). Results: according to Axis II, 96.88% the participants were classified as having chronic pain, grade I and II (low disability and low intensity; low disability and high intensity). Moderate and severe degrees of depression were observed in 84.38% of the participants. In the assessment of non-specific physical symptoms including and excluding pain, respectively, 59.38% showed severe symptoms and 71.88% had moderate and severe symptoms. There was a significant relationship between the clinical diagnosis of temporomandibular disorder and the degree of non-specific physical symptoms including pain. Conclusion: some clinical and psychosocial factors are associated in patients with temporomandibular disorder, observing a variety of clinical diagnoses with a significant relationship between clinical diagnoses and the presence of non-specific physical symptoms with pain. Complaints of greater severity of physical symptoms were found in patients with multiple clinical diagnoses.