Oral myofunctional and electromyographic evaluation of the orbicularis oris and mentalis muscles in patients with class II/1 malocclusion submitted to first premolar extraction

OBJECTIVE: The aim of this study was to assess the presence of oral myofunctional alterations before and after first premolar extraction in Class II/1 malocclusion patients that could endanger the long-term dental arch stability. MATERIAL AND METHODS: The study was performed by means of morphological, functional and electromyographic analyses in 17 Class II/1 malocclusion patients (group T) and 17 Class I malocclusion patients (group C -control), both groups with 12-30-year age range (mean age: 20.93 ± 4.94 years). RESULTS: Data analyzed statistically by Student's t-test showed a significant decrease (p0.05). The Kruskal-Wallis test analyzed data from lip posture (orbicularis oris muscle) at rest and during swallowing, as well as the mentalis muscle behavior during the above-mentioned function, not showing statistically significant differences (p>0.05) after treatment (groups T1 and T2). However, group T differed significantly from group C (p<0.05). Lip posture during swallowing showed statistically significant differences (p<0.05) for subjects submitted to orthodontic therapy when compared to data acquired before the treatment. The electromyographic analysis confirmed these data. CONCLUSIONS: Found myofunctional alterations observed after the orthodontic treatment in Class II/1 malocclusion seemed to jeopardize the long-term orthodontic stability, making recurrence possible.Federal University of São PauloUniversity of Western São Paulo StateState University of CampinasUNIFESPSciEL

Oral myofunctional and electromyographic evaluation of the anterior suprahyoid muscles and tongue thrust in patients with Class II/1 malocclusion submitted to first premolar extraction

OBJECTIVE: The aim of this study was to assess the existence of myofunctional alterations before and after first premolar extraction in Class II/1 malocclusion patients that could endanger the long-term dental arch stability. MATERIAL AND METHODS: The study was performed by means of morphological, functional and electromyographic analyses in 17 Class II/1 malocclusion patients (group T) and 17 Class I malocclusion patients (group C), both groups with 12-30-year age range (mean age: 20.93 ± 4.94 years). RESULTS: Data analyzed statistically by Student's t-test showed a significant decrease in the maxillary and mandibular dental arch perimeters after orthodontic treatment (p;0.05). However, group T differed significantly from group C (

Acupuncture to manage orofacial pain and tinnitus: Case report

BACKGROUND AND OBJECTIVES: Orofacial pain is associated to soft and mineralized oral cavity and facial tissues. In dentistry, it may have or not odontogenic origin. Temporomandibular disorder (TMD) is the most common musculoskeletal orofacial pain and presents characteristic symptoms such as masticatory muscles pain, jaw movement limitation, joint noises, earache and tinnitus. Tinnitus is a term describing the perception of sound by human ears in the absence of external sounds and causes discomfort impairing quality of life. It may be a symptom indicating TMD especially when other symptoms are present, such as facial muscles pain. Due to etiologic variability, there are several therapeutic modalities, including acupuncture. This study aimed at reporting a case of a patient with orofacial pain and tinnitus treated with acupuncture and the results after treatment. CASE REPORT: Female patient, 32 years old, came to the Acupuncture Clinic of the School of Dentistry of Piracicaba (FOP/UNICAMP) complaining of facial muscle pain and pricking at the same side, acute right ear tinnitus, already with diagnosis of left ear hearing loss and with sleep disorders and stress. Patient was treated according to her energetic unbalance with 6 sessions of traditional acupuncture, for one week, lasting 20 minutes. To evaluate orofacial pain and tinnitus intensity, the visual analog scale (VAS) was used and was called initial VAS (pre-treatment) and final VAS (post-treatment). After the second session there has been improvement in orofacial pain and tinnitus symptoms. After the sixth session tinnitus had resolved. CONCLUSION: Acupuncture has induced muscle relaxation with benefits for masticatory and middle ear (tensor tympani) muscles, as well as levator palate muscle decreasing orofacial pain and tinnitus intensity.JUSTIFICATIVA E OBJETIVOS: Dor orofacial é toda dor associada a tecidos moles e mineralizados da cavidade oral e da face. Na odontologia, podem ser de origem odontogênica e não odontogênica. A disfunção temporomandibular (DTM) é a dor orofacial musculoesquelética mais comum, apresenta sintomas característicos como dor nos músculos mastigatórios, limitação dos movimentos mandibulares, ruídos articulares, otalgia, tinido. Tinido (zumbido) é um termo que descreve a percepção de som no ouvido humano na ausência de som externo, causa de incômodo com prejuízo na qualidade de vida. Pode ser um sintoma indicativo de uma DTM principalmente quando estão presentes outros sintomas característicos da disfunção como dor nos músculos da face. Devido à variabilidade etiológica, encontram-se várias modalidades terapêuticas, incluindo a acupuntura. O objetivo deste estudo foi relatar o caso de uma paciente com dor orofacial e tinido tratada com acupuntura e seus resultados após o tratamento. RELATO DO CASO: Paciente do sexo feminino, 32 anos, compareceu a Clínica de Acupuntura da Faculdade de Odontologia de Piracicaba (FOP/UNICAMP), com queixa de dor muscular na face e formigamento do mesmo lado, tinido agudo no ouvido direito, já com diagnóstico de surdez do ouvido esquerdo e apresentando distúrbios do sono e estresse. Foi tratada de acordo com seu desequilíbrio energético, em seis sessões de acupuntura tradicional, uma por semana, com duração de 20 minutos. Para avaliar a intensidade da dor orofacial e do tinido, utilizou-se a escala analógica visual (EAV), denominada EAV inicial (pré-tratamento) e EAV final (pós-tratamento). Após a segunda sessão, observou-se melhora nos sintomas da dor orofacial e do tinido, que deixou de se manifestar após a sexta sessão. CONCLUSÃO: Acupuntura propiciou o relaxamento da musculatura com benefícios para os músculos da mastigação e da musculatura da orelha média (tensor do tímpano), bem como do músculo elevador do palato, reduzindo a intensidade da dor orofacial e do tinido.22623

Effect of mandibular mobilization on electromyographic signals in muscles of mastication and static balance in individuals with temporomandibular disorder: study protocol for a randomized controlled trial

Background The stomatognathic system and dysfunction in this system may be related to postural control. The proposal of the present study is to assess the effect of mandibular mobilization in individuals with temporomandibular disorder using surface electromyography of the muscles of mastication and stabilometric variables. Methods/Design A randomized, controlled, blind, clinical trial will be carried out, with the participants divided into three groups: 1) facial massage therapy (control group), 2) nonspecific mandibular mobilization and 3) specific mandibular mobilization. All groups will be assessed before and after treatment using the Research Diagnostic Criteria for Temporomandibular Disorders, surface electromyography of the masseter and temporal muscles and stabilometry. This study is registered with the Brazilian Registry of Clinical Trials (RBR9x8ssz). Discussion A large number of studies have employed surface electromyography to investigate the function/dysfunction of the muscles of mastication and associations with signs and symptoms of temporomandibular disorders. However, it has not yet been determined whether stabilometric variables offer adequate reliability in patients with this disorder. The results of the proposed study will help determine whether specific and/or nonspecific mandibular mobilization exerts an effect on the muscles of mastication and postural control. Moreover, if an effect is detected, the methodology defined in the proposed study will allow identifying whether the effect is local (found only in the muscles of mastication), global (found only in postural control) or generalized

Electromyography: applied in the phonoaudiology clinic

The aim of this study was to discuss the utilization of surface electromyography in the practice of phonoaudiology to obtain a picture of the muscular compromise that occurs in patients with dental and skeletal alterations. The behavior of muscles in functions such as swallowing, chewing and respiration, and at rest, and possible deviations thereof, will be examined by electromyography based on the activated muscular chains. Compromises such as tension, flaccidity, palsy and rhythm could be detected quantitatively and qualitatively during the functions

Prevalence study of signs and symptoms of temporomandibular disorder in Brazilian college students

The aim of this study was to evaluate the prevalence and severity of temporomandibular disorders (TMD) in Brazilian college students. A questionnaire was administered to 2,396 students. Seventy-three percent of women (mean age 21.94 &plusmn; 5 years) and 27% of men (mean age 22.41 &plusmn; 4.8 years) answered the questionnaire. The anamnestic index was used to classify the volunteers according to TMD severity degree. The results showed a higher percentage of men without TMD (43.74%) (p < 0.05, Chi-square test). The women exhibited some degree of severity (73.03%) at a higher frequency than men (56.26%). No significant differences were observed between sexes for a same TMD severity degree (p > 0.05). The results indicated TMD prevalence in Brazilian college students similar to that presented in other studies found in the literature reviewed. Longitudinal studies are recommended to follow the prevalence and health care needs in this population