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1.
Cranio ; 35(1): 46-51, 2017 Jan.
Article in English | MEDLINE | ID: mdl-27077251

ABSTRACT

OBJECTIVE: To compare the amplitude of mandibular movement measurements obtained by two different methods: the ultrasound JAM system and digital caliper rule in individuals with temporomandibular disorder (TMD) vs. METHOD: Sixty individuals, without distinction between sex and age were evaluated: 30 with diagnosis of TMD (RDC/TMD) and 30 controls. Mandibular movements of opening, protrusion, and left and right laterality were measured by means of two Instruments: Digital caliper rule and 3D ultrasonic Jaw Motion Analyzer (JMA-Zebris Medizintechnik, Isny/Allgäu, Germany). Data obtained were analyzed by descriptive analysis and compared by parametric statistics (Student's t-test), adopting a 5% level of significance. RESULTS: When comparing the digital caliper rule with JMA, no significant differences were found for any of the movements evaluated (p > 0.05). In the comparison between groups, a difference was found in protrusion for both instruments used: JMA (p = 0.004) and digital caliper rule (p = 0.003), with the TMD group presenting reduced movement of protrusion when compared with the control group. DISCUSSION: This study found no differences in obtaining the amplitude of mandibular movements when using the digital caliper rule or JMA system; both methods are effective. However, the ultrasonic system allows other types of analyses to be performed, such as the trajectory and speed of movement. Among the mandibular movements analyzed, protrusion was shown to be more compromised and limited in TMDs.


Subject(s)
Mandible/physiopathology , Range of Motion, Articular/physiology , Temporomandibular Joint Disorders/physiopathology , Ultrasonography/methods , Brazil , Cross-Sectional Studies , Humans , Imaging, Three-Dimensional/instrumentation , Imaging, Three-Dimensional/methods , Mandible/diagnostic imaging , Movement/physiology , Physical Examination/methods , Temporomandibular Joint Disorders/diagnostic imaging , Ultrasonography/instrumentation
2.
Braz Dent J ; 25(1): 54-8, 2014.
Article in English | MEDLINE | ID: mdl-24789293

ABSTRACT

Temporomandibular disorders (TMD) are manifested as a group of signs and symptoms that affect a particular population profile. Some variables such as sex and age influence the clinical expression of this condition. This observational descriptive cross-sectional study aimed to correlate the severity of TMD established by the craniomandibular index (CMI) with the variables: age, sex and electromyographic activity of the masseter and anterior temporal muscles. Fifty-four subjects (15 males/39 females) aged between 16 to 65 years (mean age = 41 years) and diagnosed with TMD were evaluated. Severity was determined by the CMI. These subjects also underwent examination by surface electromyography of the masseter and anterior temporal muscles. No correlation was found between age and severity of TMD (p=0.19/r=0.16), however there was a trend of greater severity in young adults (25-50 years). The sex variable in the correlation was positive with the CMI (p=0.03/r=-0.96) and superior to women. A greater EMG activity of the anterior temporal in relation to masseter (p=0.01) was found and the left temporal activity had the highest average (161.5 ± 44.6 Hz). The electromyographic activity of the anterior temporal and right masseter muscles was positively correlated with the Dysfunction Index CMI (p=0.01). The use of CMI to quantify the severity of TMD and of EMG to assess the functionality of the masticatory muscles can be important allies to direct the treatment.


Subject(s)
Age Factors , Sex Factors , Temporomandibular Joint Disorders/physiopathology , Electromyography , Female , Humans , Male , Severity of Illness Index
3.
Rev. dor ; 15(2): 91-95, Apr-Jun/2014. tab, graf
Article in English | LILACS | ID: lil-713040

ABSTRACT

BACKGROUND AND OBJECTIVES: Understanding the importance of surface electromyography as a complementary method to understand the myofunctional status of the stomatognathic system, this study aimed at analyzing the frequency of altered and normal electromyographic indices in a sample of subjects with temporomandibular disorders, in addition to their relation with pain complaint. METHODS: Participated in the study 44 individuals with temporomandibular disorder signs and symptoms (11 males and 33 females), with mean age of 39 years, who were submitted to surface electromyography. Pain intensity was measured by the visual analog scale. Total Asymmetry Index (AStotal), Masseter Asymmetry Index (ASMM), Temporal Asymmetry Index (ASTA), Activation Index (ACtotal) and Torque Index (TOtotal) were calculated. Correlation between pain intensity and electromyographic indices was checked by Pearson correlation test and sample characterization with regard to investigated indices was done by descriptive analysis. RESULTS: Means of all indices were within previously established normality patterns. The frequency of altered electromyographic indices in our sample was high (ASMM=68%; ASTA=64%; TOtotal=64%; AStotal=55%). With regard to ACtotal, there has been predominance of masseter activity as compared to temporal activity, both for normal and altered values. Among individuals with altered indices, the left side had superior activity. No correlation was found between pain intensity and the level of electromyographic indices alterations (p>0.05). CONCLUSION: The frequency of electromyographic indices alterations in individuals with temporomandibular disorders is high, pointing to the possible presence of myofunctional disorders of the stomatognathic system. These indices have no direct relation with pain complaint but show muscular activity imbalance, which may not be useful to diagnose pain, but may help the correct referral to relevant muscle therapies. .


JUSTIFICATIVA E OBJETIVOS: Compreendendo a importância da eletromiografia de superfície como método complementar para o entendimento do estado miofuncional do sistema estomatognático, o objetivo deste estudo foi analisar a frequência de índices eletromiográficos alterados e normais em uma amostra de sujeitos com disfunção temporomandibular, bem como sua relação com a queixa de dor. MÉTODOS: Foram avaliados 44 sujeitos com sinais e sintomas de disfunção temporomandibular, (11 homens/33 mulheres), com média de idade de 39 anos, os quais foram submetidos à eletromiografia de superfície. O nível de dor foi investigado por meio de escala analógica visual. Foram calculados o Índice de Assimetria Total (AStotal), Índice de Assimetria do Masseter (ASMM), Índice de Assimetria do Temporal (ASTA), Índice de Ativação (ACtotal) e Índice de Torque (TOtotal). A correlação entre o nível de dor e os índices eletromiográficos foi verificada pelo teste de correlação de Pearson e a caracterização da amostra quanto aos índices investigados foi feita por meio de análise estatística descritiva. RESULTADOS: As médias de todos os índices encontraram-se dentro dos padrões de normalidade, estabelecidos previamente. A frequência de índices eletromiográficos alterados na amostra estudada foi alta (ASMM=68%; ASTA=64%; TOtotal=64%; AStotal=55%). Em relação ao ACtotal houve predomínio de atividade do masseter em relação ao temporal, tanto para os valores normais quanto para os alterados. Dentre os sujeitos com índices alterados, o lado esquerdo apresentou atividade superior. Não foi encontrada correlação entre o nível de dor e o nível de alteração dos índices eletromiográficos ...

4.
Braz. dent. j ; 25(1): 54-58, Jan-Feb/2014. tab, graf
Article in English | LILACS | ID: lil-709395

ABSTRACT

Temporomandibular disorders (TMD) are manifested as a group of signs and symptoms that affect a particular population profile. Some variables such as sex and age influence the clinical expression of this condition. This observational descriptive cross-sectional study aimed to correlate the severity of TMD established by the craniomandibular index (CMI) with the variables: age, sex and electromyographic activity of the masseter and anterior temporal muscles. Fifty-four subjects (15 males/39 females) aged between 16 to 65 years (mean age = 41 years) and diagnosed with TMD were evaluated. Severity was determined by the CMI. These subjects also underwent examination by surface electromyography of the masseter and anterior temporal muscles. No correlation was found between age and severity of TMD (p=0.19/r=0.16), however there was a trend of greater severity in young adults (25-50 years). The sex variable in the correlation was positive with the CMI (p=0.03/r=-0.96) and superior to women. A greater EMG activity of the anterior temporal in relation to masseter (p=0.01) was found and the left temporal activity had the highest average (161.5 ± 44.6 Hz). The electromyographic activity of the anterior temporal and right masseter muscles was positively correlated with the Dysfunction Index CMI (p=0.01). The use of CMI to quantify the severity of TMD and of EMG to assess the functionality of the masticatory muscles can be important allies to direct the treatment.


As disfunções temporomandibulares (DTM) se manifestam como um conjunto de sinais e sintomas que acometem um determinado perfil da população. Algumas variáveis como gênero e idade interferem na expressão clínica desta condição. Este estudo observacional descritivo de corte transversal teve como objetivo correlacionar a severidade da DTM estabelecida pelo Índice Craniomandibular (ICM) com as variáveis: idade, gênero e atividade eletromiográfica dos músculos masseter e temporal anterior. Foram avaliados 54 (n) sujeitos (15 homens/39 mulheres), com idade entre 16 a 65 (idade média = 41 anos), diagnosticados com DTM. A severidade foi determinada através do ICM. Estes sujeitos também foram submetidos ao exame de eletromiografia de superfície dos músculos masseter e temporal anterior. Não foi encontrada correlação entre a idade e a severidade da DTM (p=0.19/r=0.16), todavia foi observada tendência de maior severidade em adultos jovens (25-50 anos). Na variável gênero a correlação foi positiva com o ICM (p=0.03/r=-0.96), havendo superioridade para as mulheres. Foi encontrada maior atividade eletromiográfica dos temporais anteriores em relação aos masseteres (p=0.01), sendo que o temporal esquerdo apresentou a maior atividade média (161.5 ± 44.6 Hz). A atividade eletromiográfica dos músculos temporal anterior e masseter à direita foram correlacionados positivamente com o Índice de Disfunção (p=0.01). A utilização do ICM para quantificar a severidade da DTM e a EMG para avaliar a funcionalidade dos músculos mastigatórios podem ser aliados importantes no direcionamento da conduta terapêutica.


Subject(s)
Female , Humans , Male , Age Factors , Sex Factors , Temporomandibular Joint Disorders/physiopathology , Electromyography , Severity of Illness Index
5.
Braz. dent. sci ; 17(2): 77-82, 2014. ilus, tab
Article in English | LILACS, BBO - Dentistry | ID: lil-728125

ABSTRACT

Objective: The aim of the study was to investigate the condylar position inside the articular cavity in temporomandibular disorder (TMD) subjects with signs and symptoms of functional articular disorders through images made with cone beam computed tomography (CBCT) at sagittal plane. Material & Methods: CBCT temporomandibular joint images of 62 patients (13 male and 49 female, mean age, 39.7 years) with intra-articular signs and symptoms diagnosed by the Craniomandibular Index were analyzed using the measurement method recommended by Kawamura and Ikeda (2009). We obtained linear measures of posterior space (PS), superior space (SS), and anterior space (AS) to determine the condyle position for each joint. T-test for independent samples for comparison between genders and ANOVA for age intervals was applied. Results: Statistical significant differences were found between males and females with TMD for SS of right temporomandibular joint (TMJ) and PS and SS of left TMJ (p < 0.05). By age-intervals, the statistical comparison showed no significant differences in the joint space among different age-intervals (p>0.05). It was found that in TMD patients PS was slightly reduced, while SS and AS were slightly increased. Conclusion: There is no difference in condylar position by age-intervals; males present the superior space higher than females and; subjects with intraarticular TMD presented a more posterior and inferior condylar position.


Objetivo: O objetivo deste trabalho foi investigar a posição condilar dentro da cavidade articular em sujeitos com Disfunções Temporomandibulares (DTM) através de imagens realizadas com tomografias computadorizadas com feixe cônico (CBCT) no plano sagital. Material e Métodos: Imagens de CBCT das articulações temporomandibulares de 62 pacientes (13 homens e 49 mulheres, com idade média, 39,7 anos) com sinais e sintomas intra-articulares diagnosticadas pelo Índice Craniomandibular (Fricton e Schiffman, 1986) foram analisadas utilizando o método de medida preconizado por Ikeda e Kawamura (2009). Foram obtidas as medidas lineares de espaço posterior (PS), espaço superior (SS), e o espaço anterior (AS) para determinar a posição do côndilo para cada articulação. Para comparação entre sexos foi utilizado o Teste-T (amostras independentes) e para comparação dos intervalos de idade foi utilizado o ANOVA. Resultados: Foi observada diferença estatisticamente significante entre homens e mulheres com DTM para SS da articulação temporomandibular (ATM) direita e SS e PS da ATM esquerda (p < 0,05). Não foi encontrada diferença na análise por intervalo de idade (p > 0,05). Sujeitos com DTM apresentaram PS ligeiramente reduzido e AS e SS aumentados. Conclusão: Não há diferença na posição condilar de acordo com a idade; homens apresentam o espaço superior maior, quando comparados às mulheres e; sujeitos com DTM articular apresentam uma posição condilar mais posterior e inferior.


Subject(s)
Humans , Male , Female , Adult , Mandibular Condyle , Temporomandibular Joint Dysfunction Syndrome , Tomography, X-Ray Computed
6.
Cranio ; 29(4): 270-5, 2011 Oct.
Article in English | MEDLINE | ID: mdl-22128666

ABSTRACT

The complete evaluation of the stomatognathic system is essential for orthodontic diagnosis and treatment planning. The evaluation should not only include the occlusal static aspects, but also the functional aspects. This is because the latter could be altered and one or more components of the stomatognathic system could be involved, including the temporomandibular joint (TMJ). The most usual alteration found is articular disk displacement, which can affect the prognosis, and eventually the result in the need for orthodontic treatment. In order to add to the literature on recognition of these alterations, the purpose of this study was to compare the findings of two calibrated examiners on disk displacement clinical diagnosis, and the possible matching between the clinical examination and the electrovibratography (EVG) as methods of disk displacement detection. The sample was composed of 60 patients, divided equally into four groups of 15 participants each, depending on the presence or absence of disk displacement determined by a clinical examination performed by two trained examiners and according to gender. One of the trained operators used EVG and SonoPAK (BioResearch, Inc., Brown Deer, WI) software. The results of the two examiners' findings, one using clinical examination and the other using EVG and SonoPak software. The results were analyzed by applying the kappa coefficient. The findings of the two examiners were very close, resulting in an excellent agreement, and the comparison between the clinical examination and EVG findings resulted in satisfactory agreement between the methods.


Subject(s)
Electrodiagnosis/methods , Joint Dislocations/diagnosis , Physical Examination , Temporomandibular Joint Disc/pathology , Temporomandibular Joint Disorders/diagnosis , Adult , Facial Pain/diagnosis , Female , Humans , Male , Palpation , Range of Motion, Articular/physiology , Reproducibility of Results , Single-Blind Method , Software , Sound , Transducers , Vibration , Young Adult
7.
J Electromyogr Kinesiol ; 21(4): 659-64, 2011 Aug.
Article in English | MEDLINE | ID: mdl-21463956

ABSTRACT

The normalized electromyographic characteristics of masticatory muscles in patients with temporomandibular joint disorders (TMD) and healthy controls were compared. Thirty TMD patients (15 men, 15 women, mean age 23 years) with long lasting pain (more than 6 months), and 20 control subjects matched for sex and age were examined. All patients had arthrogenous TMD according to the Research Diagnostic Criteria for TMD (RDC/TMD). Surface electromyography of masseter and temporal muscles was performed during maximum teeth clenching either on cotton rolls or in intercuspal position. Standardized EMG indices and the median power frequency were obtained, and compared between the two groups and sexes using ANOVAs. During clenching, the TMD patients had larger asymmetry in their temporalis muscles, larger temporalis activity relative to masseter, and reduced mean power frequencies than the control subjects (p<0.05, ANOVA). In both groups, the mean power frequencies of the temporalis muscles were larger than those of the masseter muscles (p<0.001). No sex related differences, and no sex × group interactions were found. In conclusion, young adult patients with long lasting TMD have an increased and more asymmetric standardized activity of their temporalis anterior muscle, and reduced mean power frequencies, relative to healthy controls.


Subject(s)
Electromyography , Masseter Muscle/physiopathology , Temporal Muscle/physiopathology , Temporomandibular Joint Disorders/physiopathology , Adolescent , Adult , Dental Occlusion , Female , Humans , Male , Young Adult
8.
Rev. CEFAC ; 11(supl.3): 457-465, 2009. ilus, graf, tab
Article in Portuguese | LILACS | ID: lil-534506

ABSTRACT

TEMA: eletromiografia e conduta terapêutica. PROCEDIMENTOS: este estudo foi realizado com uma paciente de 45 anos de idade, após 4 meses ser submetida a craniotomia fronto-temporal proveniente de um aneurisma. O músculo temporal anterior direito foi retirado da sua origem móvel e após a cirurgia, a paciente apresentou disfunção do músculo temporal e da articulação temporomandibular, com redução da abertura de boca, dor ao falar e comer. Utilizou-se a eletromiografia para registrar quantitativamente a atividade elétrica dos músculos temporais e masseteres na avaliação e durante o processo terapêutico. Registraram-se, na posição de repouso, oclusão máxima e mastigação habitual provocada. Fez-se terapia miofuncional durante todo o processo. RESULTADOS: dados dos exames mostraram um aumento significativo da atividade elétrica do músculo temporal anterior direito e uma redução da atividade do músculo temporal anterior esquerdo, o que no primeiro registro mostrava uma atividade elétrica rebaixada do lado direito em comparação com o lado esquerdo. Com a seleção dos exercícios miofuncionais houve uma participação mais efetiva do músculo temporal anterior direito, abertura de boca maior, sem dor, facilitando a função da mastigação e da fala, harmonizando o sistema estomatognático. CONCLUSÃO: registros comparativos dos exames de eletromiografia em diferentes etapas do processo terapêutico auxiliaram e direcionaram a melhor conduta terapêutica fonoaudiológica. Conseguiu-se atingir um equilíbrio das funções de respiração, sucção, mastigação, deglutição e fala relacionadas ao sistema estomatognático, considerando as limitações do caso.


BACKGROUND: electromyography and therapeutic behavior. PROCEDURES: this study was carried out with a woman, 45year old, after 4 months from being submitted to fronto-temporal craniotomy originated an aneurysm. The right anterior temporal muscle was removed from its insertion. After the surgery, the patient had dysfunction in temporal muscle and in temporo-mandibular joint, with reduction of the opening of mouth, pain while speaking and eating. Electromyography was used to quantitatively record the electrical activity of the temporal and masseter muscles in the initial evaluation and during the therapeutic process. Records were made at rest position, maximum occlusion and chew. They did miofuncional therapy throughout the process. RESULTS: examination data showed a significant increase in the electrical activity of the right anterior temporal muscle and a reduction in the activity of the left anterior temporal muscle. The initial Record showed a lower electrical activity on the right side compared to the left. With the miofunctional exercises there was a more effective participation of the right anterior temporal muscle, greater openness of mouth, without pain, making easier chewing and speech tasks, harmonizing the stomatognathic system. CONCLUSION: comparative records concerning electromyography in different stages of the therapeutic process helped and directed the best therapy, achieving a balance concerning the functions of breathing, sucking, chewing, swallowing and speech related to the stomatognathic system, considering the limitations of the case.

9.
Cranio ; 26(1): 50-8, 2008 Jan.
Article in English | MEDLINE | ID: mdl-18290525

ABSTRACT

The mandibular movements used during speech modify space to allow different articulation postures proper for each sound. Temporomandibular disorders (TMD) may cause modifications in these movements due to joint and muscular conditions. The aim of this study was to verify the amplitude and the characterization of the mandibular movements during speech, using computerized electrognathography, in individuals with TMD and in asymptomatic individuals, analyzing possible interferences of these dysfunctions. One hundred thirty-five (135) adult subjects were divided into two groups: GI with 90 participants diagnosed with TMD and GIII with 45 asymptomatic participants. Their mandibular movements were observed during the sequential naming of pictures containing all of the word sounds, which occur in the Brazilian Portuguese language. The records were obtained with computerized electrognathography (BioEGN-BioPak system, BioResearch Associates, Inc., Milwaukee, WI). Mean values of the amplitude were described for the two groups. The analysis of such results showed statistically significant differences between the means of the values, obtained for the two groups in the opening and retrusion ranges. Statistically significant differences were not established for the presence and the range of the deviations in laterality, during speech. Prevalence of bilateral deviations was verified in GIII and unilateral deviations in GI. This study describes the 3-dimensional thresholds of mandibular movements in speech for Brazilian Portuguese, for the investigated individuals of both groups. The presence of TMD shows reduction in mandibular opening and retrusion ranges and prevalence of unilateral deviation movements during speech.


Subject(s)
Mandible/physiopathology , Movement/physiology , Speech/physiology , Temporomandibular Joint Disorders/physiopathology , Adolescent , Adult , Epidemiologic Methods , Female , Humans , Male , Middle Aged , Vertical Dimension
10.
Pro Fono ; 19(1): 7-18, 2007.
Article in Portuguese | MEDLINE | ID: mdl-17461343

ABSTRACT

BACKGROUND: temporomandibular disorders can cause general alterations of the mandibular movements due to modification in the condition of muscles and articulations. Electrognathography, a computerized exam used to complement the diagnosis of these disorders, allows the objective delineation and record of the mandibular movements, determining their amplitude and speed. AIM: to verify the characteristics of mandibular movements of individuals with temporomandibular dysfunction and in asymptomatic individuals during speech, through computerized electrognathography, analyzing possible interferences of this dysfunction and severity implications regarding pain indexes. METHOD: 135 adults were divided in four groups based on their pain indexes, using a numeric scale: zero for pain absence, one for mild pain, two for moderate pain and three for severe pain. Mandibular movements were observed during the sequential naming of balanced pictures taking in consideration the occurrence of phonemes in the Brazilian Portuguese language. Records were obtained using computerized electrognathography (BioEGN - BioPak system). RESULTS: the analysis of the results point that differences indicated as significant for mandibular opening amplitude and mandibular closing speed occurred between index zero and all of the other pain indexes. Regarding mandibular opening speed during speech, statistically significant differences were obtained between index zero and index three. It was observed that mandibular movements in speech are discreet, with an anteroposterior component and deviations in laterality. CONCLUSION: the presence of temporomandibular dysfunctions causes reduction in the values of maximum mandibular opening and a reduction in both mandibular opening speed and mandibular closing speed during speech The different pain indexes: mild, moderate and severe do not seem to determine larger reduction of these values.


Subject(s)
Mandible/physiology , Pain Measurement , Pain/physiopathology , Speech/physiology , Temporomandibular Joint Disorders/physiopathology , Adolescent , Adult , Analysis of Variance , Case-Control Studies , Female , Humans , Male , Middle Aged , Movement , Range of Motion, Articular/physiology , Reference Values , Speech Articulation Tests/methods , Statistics, Nonparametric , Temporomandibular Joint/physiopathology
11.
Pró-fono ; 19(1): 7-18, jan.-abr. 2007.
Article in Portuguese | LILACS | ID: lil-452562

ABSTRACT

TEMA: as disfunções temporomandibulares podem acarretar alterações gerais nos movimentos mandibulares devido à modificação nas condições musculares e articulares. A eletrognatografia, exame computadorizado utilizado para complementar o diagnóstico dessas disfunções, permite delinear e registrar de maneira objetiva os movimentos mandibulares, determinando sua amplitude e velocidade. OBJETIVO: verificar as características do movimento mandibular na fala em indivíduos com disfunções temporomandibulares e em assintomáticos, por meio de eletrognatografia computadorizada, analisando possíveis interferências dessas disfunções e as implicações de severidade quanto ao índice de dor. MÉTODO: 135 participantes adultos foram divididos em quatro grupos com base nos graus de dor, utilizando-se escala numérica, sendo: zero para ausência de dor, um para dor leve, dois para dor moderada e três para dor grave. Os movimentos mandibulares foram observados na nomeação seqüencial de figuras balanceadas quanto à ocorrência dos fonemas da língua. Os registros foram obtidos com eletrognatografia computadorizada (BioEGN - sistema BioPak). RESULTADOS: a análise dos resultados mostrou que as diferenças apontadas como significantes para amplitude de abertura e para velocidade de fechamento mandibular, ocorrem entre o grau zero e todos os outros graus de dor. Para velocidade de abertura mandibular na fala, foi obtida diferença estatisticamente significante entre grau zero e grau três. Constatou-se que os movimentos mandibulares na fala são discretos, com componente antero-posterior e desvios em lateralidade. CONCLUSÃO: a presença de disfunções temporomandibulares acarreta redução das amplitudes máximas de abertura e redução da velocidade tanto de abertura quanto de fechamento dos movimentos mandibulares durante a fala. Os diferentes graus de dor: leve, moderado e grave, parecem não determinar maior redução desses valores.


BACKGROUND: temporomandibular disorders can cause general alterations of the mandibular movements due to modification in the condition of muscles and articulations. Electrognathography, a computerized exam used to complement the diagnosis of these disorders, allows the objective delineation and record of the mandibular movements, determining their amplitude and speed. AIM: to verify the characteristics of mandibular movements of individuals with temporomandibular dysfunction and in asymptomatic individuals during speech, through computerized electrognathography, analyzing possible interferences of this dysfunction and severity implications regarding pain indexes. METHOD: 135 adults were divided in four groups based on their pain indexes, using a numeric scale: zero for pain absence, one for mild pain, two for moderate pain and three for severe pain. Mandibular movements were observed during the sequential naming of balanced pictures taking in consideration the occurrence of phonemes in the Brazilian Portuguese language. Records were obtained using computerized electrognathography (BioEGN - BioPak system). RESULTS: the analysis of the results point that differences indicated as significant for mandibular opening amplitude and mandibular closing speed occurred between index zero and all of the other pain indexes. Regarding mandibular opening speed during speech, statistically significant differences were obtained between index zero and index three. It was observed that mandibular movements in speech are discreet, with an anteroposterior component and deviations in laterality. CONCLUSION: the presence of temporomandibular dysfunctions causes reduction in the values of maximum mandibular opening and a reduction in both mandibular opening speed and mandibular closing speed during speech The different pain indexes: mild, moderate and severe do not seem to determine larger reduction of these values.


Subject(s)
Adolescent , Adult , Female , Humans , Male , Middle Aged , Mandible/physiology , Pain Measurement , Pain/physiopathology , Speech/physiology , Temporomandibular Joint Disorders/physiopathology , Analysis of Variance , Case-Control Studies , Movement , Reference Values , Range of Motion, Articular/physiology , Statistics, Nonparametric , Speech Articulation Tests/methods , Temporomandibular Joint/physiopathology
12.
RGO (Porto Alegre) ; 54(4): 334-339, out.-dez. 2006. ilus, graf
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-461703

ABSTRACT

Este estudo avaliou a eficiência imediata da laserterapia de baixa potência em 13 pacientes portadores de dor e disfunção da articulação temporomandibular. Foram realizados exames clínicos para definir o lado de maior sintomatologia dolorosa e comprometimento da disfunção temporomandibular que foi tratado com aplicação do laser de diodo (Al-Ga-As), de comprimento de onda de 790 nm (infravermelho), irradiado em quatro pontos na disfunção da articulação temporomandibular com 1,5 J/cm²; um ponto na região do ouvido externo, com 2,5 J/cm²; em três pontos no músculo masseter, com 3 J/cm²; e três pontos no músculo temporal, com 3 J/cm². Os pacientes foram submetidos a uma avaliação subjetiva de dor. Os músculos masséter e temporal, de ambos os lados, foram avaliados eletromiográficamente antes da laserterapia, imediatamente a aplicação do laser, cinco minutos e vinte minutos após. Foram observadas reduções das atividades eletromiográficas medidas para todos os tempos, em ambos os músculos masseter e temporal, após a aplicação do laser. Conclusão: A laserterapia promoveu o relaxamento imediato dos músculos masseteres e temporais avaliados e conseqüente alívio na sintomatologia dolorosa.


Subject(s)
Humans , Adolescent , Adult , Low-Level Light Therapy , Temporomandibular Joint Disorders/radiotherapy , Electromyography
13.
Rev. dent. press ortodon. ortop. maxilar ; 8(3): 109-115, maio-jun. 2003. tab, graf
Article in Portuguese | LILACS | ID: lil-365679

ABSTRACT

As disfunções da ATM têm como um dos sinais clínicos, a limitação dos movimentos mandibulares. Entretanto, parece difícil determinar a existência de padrões de normalidade funcionais sem parâmetros quantitativos objetivos de diagnóstico. Neste sentido, o objetivo deste trabalho foi verificar a possibilidade de interferência das disfunções da ATM na amplitude e velocidade dos movimentos mandibulares utilizados durante a fala, com nomeação seqüencial de figuras balanceadas quanto à ocorrência dos fonemas da língua, por meio de avaliação objetiva, utilizando-se o exame complementar de eletrognatografia computadorizada (BioEGN - sistema BioPak, Bio-Research Associates, Inc., Milwaulkee, WI, USA). Foram analisados os registros de 64 sujeitos, divididos em 2 grupos, sendo 38 com disfunção da ATM e 26 assintomáticos. Os resultados mostraram que a média dos resultados dos sujeitos com disfunção da ATM para amplitude de abertura do movimento mandibular no plano frontal foi de 9,3mm (+3,0) e de 10,1mm (+ 3,2) em sujeitos assintomáticos. Quanto à velocidade de abertura mandibular na fala, a média dos resultados foi de 75,6 mm/seg. (+ 25,3) e de fechamento 76,2 mm/seg. (+ 28,7) para os dois grupos estudados, não sendo encontrada diferença significativa entre eles. A amplitude de abertura no plano frontal na fala é diretamente relacionada à velocidade do movimento mandibular. Os resultados obtidos mastram qua a utilização da eletrognatografia computadorizada é um importante e efetivo instrumento de avaliação do movimento mandibular durante a fala, propiciando parâmetros quantitativos de diagnóstico.


Subject(s)
Humans , Male , Female , Adult , Speech , Temporomandibular Joint , Temporomandibular Joint Dysfunction Syndrome
14.
JBD, J. Bras. Dent. Estét. ; 2(5): 44-9, jan.-mar. 2003. ilus, CD-ROM
Article in Portuguese | BBO - Dentistry | ID: biblio-851649

ABSTRACT

Foram selecionados três casos clínicos de pacientes portadores de lesões cervicais, representando respectivamente lesões classificadas como abfração, abrasão e/ou erosão. O preparo das lesões foi efetuado com laser Er: YAG (Kavo Key Laser 2); o forramento dentinário foi feito com ionômero de vidro (Vitrebond, 3M) e as restaurações com resina composta Filtek Z 250 (3M ESPE©). O paciente portador de lesão cervical tipo abrasão foi o único a necessitar de anestesia. O diagnóstico e a classificação das lesões cervicais, com exceção do tipo abfração em jovens, são difíceis. É indispensável a análise oclusal de pacientes portadores de lesões cervicais. A utilização do laser de Er: Yag mostrou-se extremamente eficaz na conservação do tecido dental


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Methods , Therapeutic Uses
15.
Rev. odontol. Univ. Säo Paulo ; 11(2): 109-16, abr.-jun. 1997. ilus, tab
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-192838

ABSTRACT

Para este estudo, foram selecionados vinte e seis pacientes, com características de disfunçäo miofacial, abertura limitada e dor ou sensibilidade nos músculos temporal (feixes anteriores e posteriores) e masseteres, bilateralmente. Foram utilizadas as análises eletromiográfica e eletrognatográfica desses músculos, constatando-se um aumento da atividade elétrica em alguns dos músculos citados pelo paciente como sintomáticos, bem como foi anotado o espaço funcional livre encontrado. Em seguida, foi feita a aplicaçäo da Estimulaçäo Elétrica Neural Transcutânea ("TENS") em baixa freqüência, por 43 minutos, e realizada uma avaliaçäo dos resultados. Observou-se uma reduçäo nos valores eletromiográficos registrados previamente à aplicaçäo do TENS nas fibras anteriores do temporal e masseter. O efeito disso nas relaçöes maxilomandibulares foi um apreciável aumento do espaço funcional livre


Subject(s)
Humans , Transcutaneous Electric Nerve Stimulation/methods , Transcutaneous Electric Nerve Stimulation/standards , Dental Occlusion , Temporomandibular Joint Dysfunction Syndrome/diagnosis , Temporomandibular Joint Dysfunction Syndrome/therapy , Therapy, Computer-Assisted , Electromyography , Facial Muscles/anatomy & histology , Facial Muscles/physiopathology , Jaw Relation Record , Stomatognathic System/physiopathology
16.
In. Barros, Joäo Jorge; Rode, Sigmar de Mello. Tratamento das disfunçöes craniomandibulares: ATM. Säo Paulo, Santos, 1995. p.117-27, ilus.
Monography in Portuguese | LILACS, BBO - Dentistry | ID: lil-229982
17.
In. Petrelli, Eros. Ortodontia contemporânea. Säo Paulo, Sarvier, 2 ed; 1993. p.323-30, ilus. (BR).
Monography in Portuguese | LILACS, BBO - Dentistry | ID: lil-271495
18.
Säo Paulo; Ashion; 1991. 77 p. ilus. (BR).
Monography in Portuguese | LILACS, BBO - Dentistry | ID: lil-150283

Subject(s)
Dental Occlusion
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