Manejo das disfunções temporomandibulares. Parte I: tratamento conservador / Management of temporomandibular joint disorders. Part I: conservative treatment

Objetivo: Apresentar as modalidades de tratamentos conservadoras e minimamente invasivas mais usadas disponíveis no arsenal terapêutico das desordens temporomandibulares (DTM). Revisão da literatura: Os objetivos do tratamento invariavelmente incluem redução da dor, diminuição das atividades parafuncionais e restauração da função. Dentre as alternativas conservadoras e minimamente invasivas, podemos citar os dispositivos interoclusais, exercícios terapêuticos, eletrofototermoterapia, agulhamento seco e infiltração de anestésicos locais em pontos gatilho, injeção de sangue autógeno para controle da luxação mandibular, terapia cognitivo comportamental, toxina botulínica, viscossuplementação, controle farmacológico da dor aguda e crônica. As DTMs afetam uma proporção significativa da população. Somente após o fracasso das opções não invasivas é que devem ser iniciados tratamentos mais invasivos e irreversíveis. No entanto, algumas condições, como a anquilose e neoplasias, por exemplo, são essencialmente tratadas cirurgicamente e tentativas de tratamentos conservadores podem trazer piora na qualidade de vida ou risco de morte. Considerações finais: Uma abordagem de equipe multidisciplinar para o manejo é essencial no cuidado fundamental de todos os pacientes com DTM, para que o tratamento possa ser especificamente adaptado às necessidades individuais do paciente.

Aim: To present the most widely used conservative and minimally invasive treatment modalities available in the therapeutic arsenal for temporomandibular disorders (TMD). Literature review: Treatment goals invariably include pain reduction, reduction of parafunctional activities and restoration of function. Among the conservative and minimally invasive alternatives, we can mention interocclusal devices, therapeutic exercises, electrophototherapy, dry needling and infiltration of local anesthetics in trigger points, autogenous blood injection to control mandibular dislocation, cognitive behavioral therapy, botulinum toxin, viscosupplementation, pharmacological control of acute and chronic pain. TMD affects a considerable proportion of the population. Only after non-invasive options have failed should more invasive and irreversible treatments be initiated. However, some conditions, such as ankylosis and neoplasms, for example, are treated surgically and attempts at conservative treatments can lead to worsening quality of life or risk of death. Conclusions: A multidisciplinary team approach to management is essential in the fundamental care of all TMD patients, so that treatment can be specifically tailored to the patient's individual needs.

Avaliação eletromiográfica da musculatura mastigatória e da coluna cervical com uso de placa oclusal: relato de caso / Electromyographic evaluation of masticatory and cervical musculature with occlusal splint: case report

Objetivo: Avaliar a atividade elétrica de músculos mastigatórios e cervicais e sua inter-relação na estabilização da cadeia crânio cervico umeral com uso da placa oclusal, por meio da avaliação eletromiográfica. Relato de caso: Paciente sexo feminino, 39 anos, queixando-se de dores na cabeça, faciais e cervicais, com prejuízo em suas atividades diárias. Relatou apertar os dentes durante o dia e a noite e ser uma pessoa muito ansiosa. Pratica exercício físico de 5 a 6 vezes por semana. Foi submetida ao tratamento com placa oclusal estabilizadora. O exame eletromiográfico foi realizado nos músculos masseter e trapézio, bilateralmente. A coleta de dados foi realizada antes da instalação da placa e passados 90 dias de uso. Considerações finais: Após o tempo de tratamento, foi relatado redução do comportamento de apertamento noturno e diurno dos dentes, redução do nódulo muscular antes visível na região supraescapular, eliminação das dores e melhor rendimento muscular durante a prática de atividade física.(AU)

Objective: To evaluate the electrical activity of masticatory and cervical muscles and their relationship in the stabilization of the craniocervicohumeral chain using a occlusal splint, through electromyographic evaluation. Case report: Female patient, 39 years old, complaining of headaches, facial and cervical pain, with impairment in her daily activities. She reported teeth clenching during the day and night, and being a very anxious person. She practices physical exercise 5 to 6 times a week. She underwent treatment with a stabilizing occlusal splint. The electromyographic examination was performed on the masseter and trapezius muscles, bilaterally. Data was collected before occlusal splint installation and after 90 days of use. Final considerations: After the treatment period, it was reported a reduction in the behavior of nocturnal and daytime teeth clenching, reduction of the muscle nodule previously visible in the suprascapular region, elimination of pain and better muscle performance during the practice of physical activities.(AU)

Alterações posturais associadas a distúrbios respiratórios e sua correlação com as desordens temporomandibulares: uma revisão de literatura / Postural changes associated with respiratory disorders and their correlation with temporomandibular disorders: a literature review

Objetivo: a presente revisão almeja fornecer à prática clínico-odontológica e ao meio científico uma compreensão atualizada acerca da correlação entre as alterações posturais geradas pela presença de distúrbios respiratórios e as desordens temporomandibulares (DTMs). Revisão de literatura: foi realizada uma busca entre o período de 2005 a 2021 nas seguintes bases de dados: Medline (via PubMed), Portal de Periódicos Capes e Scopus, utilizando-se dos termos "temporomandibular joint; temporomandibular disorders; posture control; postural control; breathing". Como resultado, foram encontrados 4.384 documentos, que foram analisados por títulos, resumos, texto completo e critérios de elegibilidade, até se chegar ao total de 5 estudos a serem incluídos nesta revisão. Considerações finais: os principais fatores observados foram a associação das DTMs com condições como padrão de respiração do tipo bucal, postura anterior da cabeça, hiperatividade de músculos acessórios da respiração, rotação posterior da mandíbula e apneia obstrutiva do sono. Os estudos ressaltaram a necessidade da abordagem completa desses pacientes, visto que os papéis dos distúrbios respiratórios e das alterações posturais podem representar desafios no diagnóstico e no tratamento das DTMs.(AU)

Objective: this review aims to provide to the clinical dental practice and the scientific community an updated understanding of the correlation between postural changes generated by the presence of respiratory disorders and temporomandibular joint disorders (TMD). Literature review: a search was carried out covering the period from 2005 to 2021 in the following databases: Medline (via PubMed), Portal de Periódicos Capes and Scopus using the terms temporomandibular joint; temporomandibular disorders; posture control; postural control; breathing. As a result, 4,384 documents were obtained and shortlisted by title, abstracts, full text and eligibility criteria, resulting in the five studies included in this review. Final considerations: the main factors observed were the association of TMD with conditions as mouth breathing, anterior head posture, hyperactivity of accessory breathing muscles, posterior rotation of the jaw and obstructive sleep apnea. The studies underscored the need for a complete approach to these patients, given that the role of respiratory disorders and postural changes may represent a challenge in the diagnosis and treatment of TMD.(AU)

Sociodemographic profile and stages of Parkinson's disease associated with predictors of Temporomandibular Disorder / Perfil sociodemográfico e estágios da doença de Parkinson associados com os preditores de disfunção temporomandibular

ABSTRACT Purpose: to analyze the predictors of temporomandibular disorder in people with Parkinson's disease, verifying their associations with sociodemographic aspects and stages of the disease. Methods: a study based on secondary data from research conducted in 2017 with 110 people with Parkinson's disease. They were assessed with the Research Diagnostic Criteria for Temporomandibular Disorders and the Parkinson's disease staging scale. The studied predictive variables for temporomandibular disorder were pain, crepitation, clicking, nighttime and daytime clenching/gnashing, uncomfortable/non-habitual bite, morning rigidity, and tinnitus. The sociodemographic aspects assessed were age, sex, schooling level, marital status, income, and stages 1 to 3 of the disease. The chi-squared odds ratio was used with a 95% confidence interval and significance level at p < 0.05. Results: an association was verified between nighttime clenching/gnashing and income (p = 0.006); tinnitus and income range from ½ to 3 (p = 0.003) and from 4 to 10 minimum wages (p = 0.004); and between tinnitus and stage 1 (p = 0.02). Conclusion: this study verified that the predictors associated with temporomandibular disorder in people with Parkinson's disease were pain, clicking, crepitation, uncomfortable/non-habitual bite, and morning rigidity. It was verified that income and stage 1 of the disease had an association with nighttime clenching/gnashing and tinnitus.

RESUMO Objetivo: analisar os preditores de disfunção temporomandibular em pessoas com doença de Parkinson (DP) verificando suas associações com aspectos sociodemográficos e estágios da doença. Métodos: estudo que utilizou fonte de dados secundários de uma pesquisa realizada em 2017, com 110 pessoas com DP que foram avaliadas pelo questionário para Pesquisa em Disfunção Temporomandibular (RDC/TMD) e pela escala de estadiamento da DP. As variáveis preditoras de DTM estudadas foram: dor, crepitação, estalido, apertamento/rangido noturno e diurno, mordida desconfortável/não habitual, rigidez matinal e zumbido. Os aspectos sociodemográficos avaliados foram: idade, sexo, escolaridade, estado civil, renda e estágios da doença de 1 a 3. Utilizou-se o Odds ratio do Qui-quadrado com intervalo de confiança de 95% e nível de significância de p<0,05. Resultados: verificou-se associação entre os preditores: apertamento/rangido noturno e renda (p=0,006); zumbido e grupos de renda ½ a 3 (p=0,003) e de 4 a 10 salários mínimos (p=0,004). Além da associação do zumbido e estágio 1 (p=0,02). Conclusão: nesse estudo verificou-se que os preditores associados com a DTM em pessoas com DP foram: dor, estalido, crepitação, mordida desconfortável/não habitual e rigidez matinal. E destes verificou-se associação entre renda e estágio 1 da doença com apertamento/rangido noturno e zumbido.

Abnormal findings on digital vectoelectronystagmography in patients with temporomandibular disorders

ABSTRACT Purpose: this study aimed to verify the occurrence of abnormal vectoelectronystagmography findings in patients with temporomandibular disorders (TMDs). Methods: in this cross-sectional study, patients diagnosed with TMDs underwent an otorhinolaryngological examination, audiological evaluation, and balance and vestibular function examinations, using vectoelectronystagmography. The tests performed were 1) spontaneous nystagmus, 2) saccadic movements, 3) pendular tracking, 4) optokinetic nystagmus gain and velocity, 5) rotational chair testing, and 6) post-caloric vertigo and the direction and velocity of the slow component of nystagmus. Results: thirty patients were selected (22 females and 8 males) with mean age of 30.8(14.9 years. Sensorineural hearing loss was seen in four patients (13.3%); the other patients (86.7%) had results within the normal range at all frequencies. Five patients (16.7%) showed abnormalities on the Romberg test and seven (23.3%) on the Tandem test. Abnormalities on the caloric test were seen in 40.0% of patients. More prevalence of headache (p<0.0001) and tinnitus (p<0.0001) was observed in patients with unilateral hyperreflexia, and dizziness, depression, anxiety, gait imbalance and falls in patients with bilateral hyperreflexia. Conclusion: patients with TMDs may present vectoelectronystagmography abnormalities characterized by unilateral or bilateral hyperreflexia and unilateral hyporeflexia of post-caloric nystagmus.

Relação entre o estrogênio e as disfunções temporomandibulares: uma revisão de literatura / Relationship between estrogen and temporomandibular disorders: a review of literature

Objetivo: realizar uma revisão da literatura a fim de traçar um panorama atual sobre o papel do estrogênio nas disfunções temporomandibulares. Metodologia: foram realizadas buscas nas plataformas digitais Pub- Med, SciELO e Google Acadêmico, durante os meses de setembro de 2018 a maio de 2019, sem filtros para determinar período de tempo, sendo excluídos aqueles trabalhos em que não foi possível identificar relação com o tema. Resultados: na análise dos estudos encontrados, foi observada a relação entre o estrogênio e a prevalência de disfunções temporomandibulares em mulheres. O estrogênio atua central e perifericamente no sistema nervoso central, influenciando no processamento dos receptores pró e antinoceptivos da articulação temporomandibular. Considerações finais: a modulação estrogênica da dor é um mecanismo complexo. Diversos estudos associam o hormônio estrogênio às disfunções temporomandibulares. Embora não haja um consenso entre os autores do papel exato deste hormônio, há evidências comprovadas de que as mulheres possuem uma susceptibilidade a dores em geral, com prevalência tanto em frequência quanto em intensidade.(AU)

Objective: to carry out an integrative review of the literature in order to outline the role of estrogen in temporomandibular disorders. Methodology: the study searched studies in the digital platforms PubMed, SciELO and Google Acadêmico, from September 2018 to May 2019, without filters to determine the time period, excluding those works in which it was not possible to identify relation with the theme. Results: among the analysis of the studies found, the relationship between estrogen and the prevalence of temporomandibular disorders in women was observed. Estrogen acts centrally and peripherally in the central nervous system, influencing the processing of the pro and antinoceptive receptors of the temporomandibular joint. Final considerations: estrogenic modulation of pain is a complex mechanism. Several studies associate the estrogen hormone with temporomandibular disorders. Although there is no consensus among authors of the exact role of this hormone, there is proven evidence that women have a susceptibility to pain in general, with prevalence both in frequency and intensity.(AU)

The association of self-reported awake bruxism with anxiety, depression, pain threshold at pressure, pain vigilance, and quality of life in patients undergoing orthodontic treatment

Abstract This study aimed to evaluate whether the presence of awake bruxism was associated with temporomandibular dysfunction symptoms, pain threshold at pressure, pain vigilance, oral health-related quality of life (OHRQoL), and anxiety and depression symptoms in patients undergoing orthodontic treatment. Methodology This observational study followed patients who had started receiving orthodontic treatment for six months. The following variables were measured three times (at baseline, one month, and six months): pressure pain threshold (PPT) in the right and left masseter, anterior temporalis, and temporomandibular joint (TMJ), and right forearm; pain vigilance and awareness questionnaire; and shortened form of the oral health impact profile (OHIP-14). Anxiety and depression symptoms were measured using the Beck anxiety inventory and the Beck depression inventory, respectively. The patients were divided into two main groups according to the presence (n=56) and absence (n=58) of possible awake bruxism. The multi-way analysis of variance (ANOVA) was applied on the date (p=0.050). Results TMJ and/or muscle pain were not observed in both groups. Time, sex, age group, and awake bruxism did not affect the PPT in the masticatory muscles and pain vigilance (p>0.050). However, the primary effect of awake bruxism was observed when anxiety (ANOVA: F=8.61, p=0.004) and depression (ANOVA: F=6.48, p=0.012) levels were higher and the OHRQoL was lower (ANOVA: F=8.61, p=0.004). Conclusion The patients with self-reported awake bruxism undergoing an orthodontic treatment did not develop TMJ/masticatory muscle pain. The self-reported awake bruxism is associated with higher anxiety and depression levels and a poorer OHRQoL in patients during the orthodontic treatment.

Tongue function and swallowing in individuals with temporomandibular disorders

Abstract The tongue participates in the oral phase of swallowing by pushing the food bolus toward the oropharynx. This relationship between tongue function and swallowing is little addressed addressed in individuals with temporomandibular dysfunction (TMD). Objective: To analyze the association of functional tongue conditions on swallowing in individuals with TMD. Methodology: After approval by the Institutional Review Board, the study was conducted on 30 individuals of both sexes, aged 18 to 28 years, with TMD, and not treated for the disorder. Tongue function was assessed as to the mobility, pressure, and oral motor control. Swallowing was analyzed by clinical assessment during ingestion of solid (wafer biscuit) and liquid (water). Data regarding mobility and swallowing were collected using the orofacial myofunctional evaluation protocol. Tongue pressure was measured by the Iowa Oral Performance Instrument, during elevation, protrusion, swallowing, and resistance test. The oral motor control was assessed by the oral diadochokinesis (DDK) test by rapid and repeated emissions of syllables "ta" and "ka". Data were statistically analyzed by the Spearman correlation coefficient, at a significance level of 5%. Results: Relationships were found between tongue function and swallowing for the following aspects: mobility (r=0.741), pressure in protrusion (r=-0.366), swallowing of saliva (r=-0.499), mean DDK rate in emissions "ta" (r=-0.424) and "ka" (r=-0.446), and mean DDK period in emissions "ta" (r=0.424) and "ka" (r=0.446). Thus, the greater the change in tongue mobility, the lower the tongue pressure in protrusion and swallowing of saliva, the lower the emissions per second, the longer the mean time between vocalizations, and the worse the swallowing of individuals with TMD. Conclusion: The functional conditions of the tongue regarding mobility, pressure, and oral DDK were associated with swallowing in individuals with TMD.

Validação do protocolo de avaliação miofuncional orofacial MBGR para adultos com disfunção temporomandibular com deslocamento de disco com redução / Validation of the MBGR orofacial myofunctional assessment protocol for adults with temporomandibular disorders with disc displacement with reduction

RESUMO Objetivo Este estudo visou validar o Protocolo de Avaliação Miofuncional Orofacial MBGR para adultos com DTM. Método Participaram 30 adultos, sendo 15 com DTM (deslocamento de disco com redução segundo o Research Diagnostic Criteria for Temporomandibular Disorders) e 15 Controles. O processo de validação envolveu a validade de conteúdo, de critério e de construto, além da concordância inter e intra-avaliador, sensibilidade e especificidade. Considerou-se nível de significância de 5%. Resultados Foram confirmadas as validades de conteúdo, visto que o Protocolo MBGR abarca todas as questões funcionais presentes em indivíduos com DTM; de critério, com correlações significantes entre o MBGR e AMIOFE; e de construto, diferenciando indivíduos com e sem DMO quanto à dor à palpação e mobilidade mandibular, com correlação significante entre a avaliação clínica do MBGR e o uso do algômetro digital, bem como confirmação do exame instrumental para a classificação do modo respiratório. A força de concordância variou de pobre a muito boa para a análise interavaliador e de razoável a muito boa para intra-avaliador. Os valores de sensibilidade e especificidade foram elevados. Conclusão O Protocolo MBGR mostrou-se válido para aplicação em adultos com DTM com deslocamento de disco com redução e controles, contemplando todos os aspectos que possibilitam a análise das condições oromiofuncionais nesses indivíduos.

ABSTRACT Purpose This study aimed at validating the MBGR Orofacial Myofunctional Assessment Protocol (MBGR Protocol) for adults with Temporal Mandibular Disorders (TMD). Methods The study sample was composed of 30 adults: 15 with TMD (disc displacement with reduction according to the Research Diagnostic Criteria for Temporomandibular Disorders) and 15 control individuals. The validation process encompassed the content, criterion, and construct of the protocol, as well as its inter- and intra-rater agreement levels and sensitivity and specificity values, considering a 5% statistical significance level. Results The following validities were confirmed: of content, as the MBGR Protocol covers all functional issues present in patients with TMD; of criterion, with significant correlations between the MBGR and Orofacial Myofunctional Evaluation with Scores (OMES) protocols; of construct, differentiating individuals with and without Orofacial Myofunctional Disorders (OMD) as for pain on palpation and mandible range of motion, with significant correlation between the MBGR clinical evaluation and that using a digital algometer, as well as confirmation of the instrumental assessment for the breathing mode classification. Agreement ranged from poor to very good and from reasonable to very good for the inter- and intra-rater power analyses, respectively. High sensitivity and specificity values were observed. Conclusion The MBGR Protocol proved to be valid for use in adults presented with TMD with disc displacement with reduction and controls, covering all aspects that enable the analysis of OMD in these individuals.

Interação entre disfunções temporomandibulares, diagnósticos e modalidades de tratamento / Interaction between temporomandibular disorders, diagnoses and treatment modalities

Objetivo: esclarecer a importância de interação diagnóstica, tratamento e desordens temporomandibulares. Revisão de literatura: a necessidade de conhecimento para avaliar o funcionamento do sistema estomatognático identificando possíveis desordens temporomandibulares e mialgias faciais é de suma importância. Por meio de anamnese e exame clínico detalhado, é possível selecionar e instituir um plano de tratamento. Tratar desordens temporomandibulares e mialgias faciais associadas às deformidades dentoesqueléticas depende de um diagnóstico correto e, principalmente, de um plano de tratamento adequado, pois, havendo equívoco, poderá resultar em um mau prognóstico. As modalidades de tratamento das desordens articulares incluem os tratamentos conservadores e os não conservadores. Presume-se que a grande maioria dos pacientes que buscam um tratamento cirúrgico baseiam-se nas recomendações dos ortodontistas, porém, nem sempre enfocam os aspectos esqueletais de uma má oclusão severa, o que pode não ser conduzido da maneira mais adequada para o reestabelecimento da funcionalidade facial. Considerações finais: condutas terapêuticas instituídas nas desordens temporomandibulares não orientadas, descartando hipóteses fatoriais diversas, podem comprometer um futuro tratamento ou agravar a situação patológica presente.(AU)

Objective: to clarify the importance of diagnostic interaction, treatment and temporomandibular disorders. Literature review: the need for knowledge in assessing the functioning of the stomatognathic system by identifying possible temporomandibular disorders and facial myalgias is of paramount importance. Through anamnesis and detailed clinical examination it is possible to select and institute a treatment plan. Treating temporomandibular disorders and facial myalgias associated with dento-skeletal deformities depends on a correct diagnosis and, above all, on an adequate treatment plan, since doing so may result in poor prognosis. The mode of treatment of joint disorders includes conservative and non-conservative treatments. It is presumed that the vast majority of patients seeking surgical treatment are based on the recommendations of orthodontists, but they do not always focus on the skeletal aspects of severe malocclusion, which may not be conducted in the most appropriate way for reestablishment of facial functionality. Final considerations: therapeutic behaviors instituted in non-oriented temporomandibular disorders, discarding several factorial hypotheses may compromise a future treatment or exacerbate the present pathological situation. (AU)

Relação da DTM dolorosa com a função de fala: Quais as possíveis características de movimentos mandibulares e os principais sintomas relatados? / Relation of painful TMD with the speech function: What are the possible characteristics of mandibular movements and the main symptoms reported?

RESUMO Objetivo Analisar os movimentos mandibulares de pacientes com DTM dolorosa durante a função de fala, a fim de compreender possíveis alterações e quais subgrupos de pacientes podem apresentá-las. Além de identificar quais sinais e sintomas relacionados com a DTM dolorosa são percebidos no desempenho desta função. Método Trinta e dois sujeitos com idade entre 18 e 60 anos (35,1 ± 8,9), 23 com DTM ( DC/TMD; oito homens e 15 mulheres) e nove controles foram avaliados quanto à: autopercepção de sinais e sintomas de DTM durante a fala (ProDTMMulti); amplitude de movimentos mandibulares durante a leitura de lista de palavras (eletrognatografia, Jaw Motion Analyses). Foi calculada a porcentagem de utilização de movimento durante o desempenho da fala em função da amplitude máxima individual, e foram subdivididos grupos de pacientes com DTM dolorosa (DTM-D) e dolorosa/articular (DTM-D/A). Resultados O grupo DTM-D/A apresentou maior porcentagem de utilização de movimento na lateralidade durante a fala que os demais grupos. A dor, os ruídos articulares e a dificuldade para falar foram os sinais/sintomas mais relatados no desempenho da fala. A percepção de ruídos articulares e a presença de desvios laterais foram significativamente superiores no grupo DTM-D/A (p<0,05). Conclusão Os desvios laterais são a principal alteração de movimento mandibular durante o desempenho da fala na DTM dolorosa. Tais desvios são mais esperados nos quadros de DTM articular (deslocamentos de disco e doenças degenerativas). A percepção de dor e de ruídos articulares são as principais queixas relacionadas à função orofacial de fala em indivíduos com DTM dolorosa.

ABSTRACT Objective To analyze the mandibular movements of patients with painful TMD during the speech function in order to understand possible alterations and which subgroups of patients may present them. In addition to identifying which signs and symptoms related to painful TMD are perceived in the performance of this function. Methods Thirty-two subjects aged between 18-60 years old (35.1 ± 8.9), 23 with TMD ( DC/TMD; eight men and 15 women) and nine controls were evaluated regarding: self-perception of TMD signs and symptoms during speech (ProTMDMulti); range of mandibular movements during the reading of a word list (electrognatography, Jaw Motion Analyzes). The percentage of movement usage during the speech performance as a function of maximum individual amplitude was calculated, and groups of patients with painful TMD (TMD-D) and painful/joint (TMD-D/A) were subdivided. Results The TMD-D/A group presented a higher percentage of use of lateral movement during speech than the other groups. Pain, joint noise, and difficulty in speaking were the most commonly reported signs/symptoms of speech performance. The perception of joint noises and the presence of lateral deviations were significantly higher in the TMD-D/A group (p<0.05). Conclusion The lateral deviations are the main alteration of the mandibular movement during the speech performance in painful TMD. Such deviations are more expected in joint TMD (disc displacement and degenerative diseases). The perception of pain and joint noise are the main complaints related to the orofacial speech function in individuals with painful TMD.

Temporomandibular joint disc displacement with reduction: a review of mechanisms and clinical presentation

Abstract Disc displacement with reduction (DDWR) is one of the most common intra-articular disorders of the temporomandibular joint (TMJ). Factors related to the etiology, progression and treatment of such condition is still a subject of discussion. This literature review aimed to address etiology, development, related factors, diagnosis, natural course, and treatment of DDWR. A non-systematic search was conducted within PubMed, Scopus, SciELO, Medline, LILACS and Science Direct using the Medical Subjective Headings (MeSH) terms "temporomandibular disorders", "temporomandibular joint", "disc displacement" and "disc displacement with reduction". No time restriction was applied. Literature reviews, systematic reviews, meta-analysis and clinical trials were included. DDWR is usually asymptomatic and requires no treatment, since the TMJ structures adapt very well and painlessly to different disc positions. Yet, long-term studies have shown the favorable progression of this condition, with no pain and/or jaw locking occurring in most of the patients.

Temporomandibular joint function 10-15 years after mandibular setback surgery and six weeks of intermaxillary fixation

Abstract Intermaxillary fixation (IMF) is a classic method for immobilization of the mandible after mandibular fractures and corrective surgery. However, it has been suggested that IMF may be a risk for developing temporomandibular joint (TMJ)-related symptoms, especially when applied for longer periods. Objective: To evaluate the clinical function of TMJs and masticatory muscles 10-15 years after mandibular setback surgery and subsequent six weeks of IMF. The patients' self-reported TMJ and masticatory muscle symptoms were also addressed. Methodology: Thirty-six patients (24 women and 12 men) treated with intraoral vertical ramus osteotomies and subsequent six weeks of IMF, underwent a clinical examination of TMJs and masticatory muscles 10-15 years after surgery and completed a five-item structured questionnaire reporting subjective TMJ-related symptoms. Mean age by the time of clinical examination was 34.1 years (range 27.2-59.8 years). The clinical outcome was registered according to the Helkimo clinical dysfunction index. Descriptive and bivariate statistics were performed and level of significance was set to 5%. Results: Mean maximum unassisted mouth opening 10-15 years after surgery was 50.1 mm, (range 38-70 mm, SE 1.2), statistically significantly greater in men compared to women (p=0.004). Mean Helkimo dysfunction group was 1.5 (range 1-3, SE 0.10). Eighty-one percent experienced pain on palpation in either the masseter muscle, temporal muscle or both, and 31% experienced pain when moving the mandible in one or more directions. Thirty-one percent reported pain from palpating the TMJs. In the questionnaire, none reported to have pain during chewing or mouth opening on a weekly or daily basis, but 22% reported difficulties with maximum opening of the mouth. Conclusion: Ten to fifteen years after mandibular setback surgery the patient's mandibular range of movement is good. Despite clinically recognizable symptoms, few patients reported having TMJ- or masticatory muscle-related symptoms in their daily life.

Impact of temporomandibular disorders on oral health-related quality of life of institutionalized elderly people / Impacto da disfunção temporomandibular na qualidade de vida relacionada à saúde bucal em idosos institucionalizados

Objective: to assess the characteristics associated withtemporomandibular disorders (TMD) and their impacton oral health-related quality of life (OHRQoL) of institutionalizedelderly people. Subjects and method: itwas a cross-sectional study performed in 30 private institutionsfor the elderly. The data collected included theTMD questionnaire and clinical evaluation assessed bythe Research Diagnostic Criteria/TemporomandibularDisorders (RDC/TMD), as well as the OHIP-49 questionnairefor OHRQoL. Results: twenty-four institutionsaccepted to participate in the study (n = 375 with 133fit for answering both questionnaires). Considering thecharacteristics, tinnitus was the most frequent symptomreported, while 98.5% of the research participants didnot present myofascial pain. Disc displacement wasobserved in 26.3%, while 93% of individuals did notpresent chronic pain. Severe depression was found in23.3% of the elderly with 24.1% presenting moderatelevels of non-specific physical symptoms, includingpain. Poisson regression analysis showed that the characteristicsreported were associated with a negativeimpact on OHRQoL. Conclusion: the domain-specificanalysis showed that all domains were affected negativelyby TMD characteristics and higher levels of depressionare associated with a negative impact on OHRQoL. (AU)

Objetivo: avaliar as características associadas às disfunções temporomandibulares (DTM) e seu impacto na qualidade de vida relacionada a saúde bucal (OHRQoL) em idosos institucionalizados. Sujeitos e método: este foi um estudo transversal, realizado em trinta instituições privadas de idosos. Os dados coletados incluíram um questionário e uma avaliação clínica de DTM por meio do instrumento Research Diagnostic Criteria/ Temporomandibular Disorders (RDC/TMD) e do questionário OHIP 49 para OHRQoL. Resultados: vinte e quatro instituições autorizaram a realização do estudo, (n = 375 com 133 idosos aptos a responder ambos os questionários). Dentre as características, o agravo mais frequentemente relatado foi a ocorrência de zumbido no ouvido, enquanto 98,5% dos participantes da pesquisa não apresentaram dor miofascial. Deslocamento de disco foi observado em 26,3%, enquanto 93% dos indivíduos não apresentaram dor crônica. Depressão severa foi encontrada em 23,3% dos idosos avaliados, com 24,1% apresentando grau moderado de sintomas físicos não específicos, incluindo dor. Análise da regressão de Poisson apresentou que as características relatadas estiveram associadas a impacto negativo na qualidade de vida relacionada à saúde bucal. Conclusão: realizando a análise por domínios, todos os domínios foram negativamente afetados pelas características da DTM, e os níveis maiores de depressão estão associados a um impacto negativo na OHRQoL. (AU)

Importancia del líquido sinovial en la articulación temporomandibular y sus implicancias en la patología articular / Value of synovial fluid in the temporomandibular joint and its implications in articular pathology

RESUMEN: El objetivo de este estudio fue realizar una revisión de la literatura respecto de la importancia del líquido sinovial en la articulación temporomandibular y sus implicancias en la patología articular. El líquido sinovial corresponde a un fluido viscoso y filante de color amarillento claro, compuesto principalmente por proteínas plasmáticas, componentes celulares, moléculas lubricantes, citoquinas, factores de crecimiento y enzimas. Es producido por la membrana sinovial y se encuentra en relación directa con las superficies articulares y la membrana sinovial, mediando las interacciones entre los tejidos de las articulaciones sinoviales. En la articulación temporomandibular desempeña un papel fundamental en el mantenimiento y regulación de la fisiología, a través de funciones lubricantes, reguladoras y metabólicas, disminuyendo el roce de las superficies articulares durante todos sus movimientos. En los trastornos temporomandibulares, la composición y función del líquido sinovial se puede ver alterada por cambios en los tejido de la articulación temporomandibular, estos cambios pueden resultar en una disminución en la capacidad de lubricar las superficies articulares y generar un ambiente catabólico en el interior de la articulación, contribuyendo conjuntamente al deterioro de éstas.

SUMMARY: The aim of this study was to conduct a review of the literature on the value of synovial fluid in the temporomandibular joint and its implications in joint pathology. The synovial fluid is a viscous and filamentous fluid of a light yellow color, composed mainly of plasma proteins, cellular components, lubricating molecules, cytokines, growth factors and enzymes. It is produced by the synovial membrane and is in direct relation with the joint surfaces and the synovial membrane, mediating the interactions between the tissues of the synovial joints. In the temporomandibular joint it plays a fundamental role in the maintenance and regulation of physiology, through lubricating, regulating and metabolic functions, decreasing the friction of the joint surfaces during all its movements. In temporomandibular disorders, synovial fluid function can be altered by changes in the tissues of the temporomandibular joint, these changes can result in a decrease in the ability to lubricate the joint surfaces and generate a catabolic environment inside the joint, contributing together to the deterioration of these.

Prevalência de sinais e sintomas de disfunção temporomandibular em estudantes pré-vestibulandos: associação de fatores emocionais, hábitos parafuncionais e impacto na qualidade de vida / Prevalence of signs and symptoms of temporomandibular disorders in college preparatory students: associations with emotional factors, parafunctional habits, and impact on quality of life

Resumo O objetivo deste estudo foi avaliar a prevalência de sinais e sintomas de disfunção temporomandibular (DTM), sua associação com gênero, hábitos parafuncionais, tensão emocional, ansiedade e depressão e, o seu impacto sobre a qualidade de vida relacionada com a saúde oral (QVRSO) em estudantes pré-vestibulandos de instituições públicas e privadas de João Pessoa/PB. A presença de sintomas de DTM foi determinada através de questionário anamnésico, contendo também questões relacionadas à presença de hábitos parafuncionais e tensão emocional. Um protocolo simplificado de avaliação clínica foi aplicado. Ansiedade e depressão foram determinadas através da escala Hospital Anxiety and Depression (HAD) e, a QVRSO avaliada por meio da versão resumida do Oral Health Impact Profile (OHIP-14). Foram realizados testes de Qui-quadrado, Exato de Fisher, Mann Whitney e Kruskal-Wallis. A presença de sinais e sintomas de DTM foi estatisticamente associada ao gênero feminino, hábitos parafuncionais, tensão emocional e ansiedade, e representou maior comprometimento da QVRSO. A elevada prevalência de sinais e sintomas de DTM entre os estudantes pré-vestibulandos sinaliza a necessidade de divulgação e esclarecimento de professores e alunos visando o diagnóstico precoce e a prevenção.

Abstract The aim of this study was to evaluate the prevalence of temporomandibular disorders (TMD) signs and symptoms, its correlation with gender, parafunctional habits, emotional stress, anxiety, and depression and its impact on oral health-related quality of life (OHRQL) in college preparatory students at public and private institutions in João Pessoa, Paraíba (PB). The sample consisted of 303 students. Presence of TMD symptoms was determined by an anamnesis questionnaire containing questions related to the presence of parafunctional habits and emotional stress. A simplified clinical evaluation protocol was used. Anxiety and depression were determined with the Hospital Anxiety and Depression (HAD) scale and the OHRQL using the short version contained in the Oral Health Impact Profile (OHIP-14). The Chi-square, Fisher Exact, Mann Whitney, and Kruskal-Wallis tests were performed. Presence of signs and symptoms of TMD was statistically associated (p ≤ 0,05) with female gender, parafunctional habits, emotional stress, and anxiety, and represented greater impairment of the OHRQL. The physical pain domain was the most affected. The increased prevalence of signs and symptoms of TMD among college preparatory students indicates that there is a need for education and clarification among teachers and students to improve early diagnosis and to prevent the problem.

Association of facial massage, dry needling, and laser therapy in Temporomandibular Disorder: case report / Associação entre massagem facial, agulhamento a seco e laserterapia no tratamento da Disfunção Temporomandibular: relato de caso

ABSTRACT This case report aims to evaluate the treatment of Temporomandibular Disorder (TMD) of muscular origin by associating facial massage (FM), dry needling (DN), and low-level laser therapy (LLLT). The pre- and post-treatment evaluations consisted of clinical examinations based on the Research Diagnostic Criteria (RDC) for TMD, pain intensity quantification by means of the Visual Analog Scale (VAS), mandibular movement measurement, and electromyographic (EMG) analysis of the masseter and temporal muscles. Post-therapy assessment indicated a decrease in pain sites of 58%, in pain intensity mean (1.3), and an increase in the maximum aperture of 10 mm, in addition to normalization of EMG signals. We conclude that, after application of the treatment protocol, there was a decrease in painful sites, gain in amplitude of mandibular movements, and normalization of EMG activity.

RESUMO O objetivo do presente relato de caso é avaliar a associação entre a Massagem Facial (MF), Agulhamento a Seco (AS) e Terapia a Laser de Baixa Intensidade (TLBI) no tratamento da Disfunção Temporomandibular (DTM) de origem muscular. Paciente com DTM crônica foi submetida a 4 sessões de associação entre a MF, AS e TLBI. A avaliação inicial e final foi composta por exame clínico baseado nos Critérios diagnósticos de pesquisa para DTM (RDC - Research Diagnostic Criteria), quantificação da intensidade da dor por meio da Escala visual analógica de dor, mensuração dos movimentos mandibulares e análise eletromiográfica (EMG) dos músculos masseter e temporal. Na pós-terapia, foi observada a redução de 58% dos sítios dolorosos, da média (1,3) da intensidade de dor e aumento de 10 mm na abertura máxima, além da normalização dos sinais EMG. Conclui-se que, após a aplicação de protocolo de tratamento, houve a redução dos sítios dolorosos, ganho de amplitude dos movimentos mandibulares e normalização da atividade EMG.