Comparative clinical study of light analgesic effect on temporomandibular disorder (TMD) using red and infrared led therapy.

Low-level laser therapy (LLLT) has been widely applied in pain relief in several clinical situations, including temporomandibular disorders (TMD). However, the effects of LED therapy on TMD has not been investigated. This study aims to evaluate the effects of red and infrared LEDs on: (1) tissue temperature in ex vivo and (2) pain relief and mandibular range of motion in patients with TMD. Thirty patients between 18 and 40 years old were included and randomly assigned to three groups. The two experimental groups were: the red LED (630 ± 10 nm) group and the infrared LED (850 ± 10 nm) group. The irradiation parameters were 150 mW, 300 mW/cm(2), 18 J/cm(2), and 9 J/point. The positive control group received an infrared laser (780 nm) with 70 mW, 1.7 W/cm(2), 105 J/cm(2), and 4.2 J/point. LED and laser therapies were applied bilaterally to the face for 60 s/point. Five points were irradiated: three points around the temporomandibular joint (TMJ), one point for the temporalis, and one near the masseter. Eight sessions of phototherapy were performed, twice a week for 4 weeks. Pain induced by palpating the masseter muscle and mandibular range of motion (maximum oral aperture) were measured at baseline, immediately after treatment, 7 days after treatment, and 30 days after treatment. There was an increase in tissue temperature during both the red and the infrared LED irradiation in ex vivo. There was a significant reduction of pain and increase of the maximum oral aperture for all groups (p ≥ 0.05). There was no significant difference in pain scores and maximum oral aperture between groups at baseline or any periods after treatment (p ≥ 0.05). The current study showed that red and infrared LED therapy can be useful in improving outcomes related to pain relief and orofacial function for TMD patients. We conclude that LED devices constitute an attractive alternative for LLLT.

Measurements of jaw movements and TMJ pain intensity in patients treated with GaAlAs laser.

The aim of this study was to evaluate the effectiveness of low-level laser therapy (LLLT) on the improvement of the mandibular movements and painful symptoms in individuals with temporomandibular disorders (TMD). Forty patients were randomly divided into two groups (n=20): Group 1 received the effective dose (GaAlAs laser λ 830 nm, 40 mW, 5J/cm²) and Group 2 received the placebo application (0 J/cm²), in continuous mode on the affected condyle lateral pole: superior, anterior, posterior, and posterior-inferior, twice a week during 4 weeks. Four evaluations were performed: E1 (before laser application), E2 (right after the last application), E3 (one week after the last application) and E4 (30 days after the last application). The Kruskal-Wallis test showed significant more improvements (p<0.01) in painful symptoms in the treated group than in the placebo group. A significant improvement in the range of mandibular movements was observed when the results were compared between the groups at E4. Laser application can be a supportive therapy in the treatment of TMD, since it resulted in the immediate decrease of painful symptoms and increased range of mandibular movements in the treated group. The same results were not observed in the placebo group.

O efeito do laser de baixa intensidade no tratamento das cefaleias cervicogênicas: apresentação de sete casos / Low-intensity laser to treat cervicogenic headaches: presentation of seven cases.

JUSTIFICATIVA E OBJETIVOS: A cefaleia cervicogênica é caracterizada por dor nucal e/ou fronto-temporal desencadeada por distúrbio na região do pescoço, C1, C2 ou C3. A dor é unilateral, iniciada na região da nuca e referida na região fronto-temporal sendo episódica ou crônica. O bloqueio do nervo occipital maior ou menor é feito com duas finalidades: terapêutica e diagnóstica. O objetivo deste estudo foi verificar o efeito do laser de baixa intensidade (GaAlAs) aplicado na região do nervo occipital maior e menor e/ou da raiz C2 do lado sintomático no tratamento das cefaleias cervicogênicas, substituindo o bloqueio convencional.RELATOS DOS CASOS: Foram encaminhados para o procedimento sete pacientes, do Ambulatório de Cefaleia do Hospital de Clínicas da Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo. Esses pacientes foram submetidos às aplicações com o laser (D = 60J/cm², 1 vez/semana durante 4 semanas) do lado sintomático em 8 pontos-gatilho localizados através da palpação na região dos nervos occipital maior e menor. Esses pacientes preencheram um diário de dor e foram feitas 4 avaliações: A0 (antes da 1a aplicação), A1 (logo após a última aplicação), A2 e A3 (30 e 60 dias após a última aplicação). CONCLUSÃO: Laser de baixa intensidade promoveu a diminuição da intensidade e frequência da sintomatologia, mas de acordo com os resultados sugere-se que alterações na potência e doses sejam feitas a fim de se buscar um protocolo mais exato.

BACKGROUND AND OBJECTIVES: Cervicogenic headache is characterized by nuchal and / or fronto-temporal pain triggered by neck region disorder, C1, C2 or C3. Pain is unilateral, starts in the nuchal region and refers to fronto-temporal region, being episodic or chronic. Major or minor occipital nerve block is performed with two goals: therapeutic and diagnostic. This study aimed at observing the effect of low-intensity laser (GaAIAs) applied to major and minor occipital nerve and / or C2 root at the symptomatic side to treat cervicogenic headaches, replacing conventional block.CASE REPORTS: Seven patients of the Headache Ambulatory, Clinicas Hospital, School of Medicine of Ribeirão Preto, University of São Paulo, were referred to the procedure. Patients were submitted to laser applications (D = 60J/cm², once a week for four weeks) at the symptomatic side in 8 trigger-points identified through palpation of major and minor occipital nerves region. Patients filled a pain log and 4 evaluations were made: A0 (before first application), A1 (soon after last application), A2 and A3 (30 and 60 days after last application). CONCLUSION: Low-intensity laser has decreased symptoms intensity and frequency, but according to results we suggest that changes in potency and dosages are made to look for a more accurate protocol.

Measurements of jaw movements and TMJ pain intensity in patients treated with GaAlAs laser

The aim of this study was to evaluate the effectiveness of low-level laser therapy (LLLT) on the improvement of the mandibular movements and painful symptoms in individuals with temporomandibular disorders (TMD). Forty patients were randomly divided into two groups (n=20): Group 1 received the effective dose (GaAlAs laser ? 830 nm, 40 mW, 5J/cm2) and Group 2 received the placebo application (0 J/cm2), in continuous mode on the affected condyle lateral pole: superior, anterior, posterior, and posterior-inferior, twice a week during 4 weeks. Four evaluations were performed: E1 (before laser application), E2 (right after the last application), E3 (one week after the last application) and E4 (30 days after the last application). The Kruskal-Wallis test showed significant more improvements (p<0.01) in painful symptoms in the treated group than in the placebo group. A significant improvement in the range of mandibular movements was observed when the results were compared between the groups at E4. Laser application can be a supportive therapy in the treatment of TMD, since it resulted in the immediate decrease of painful symptoms and increased range of mandibular movements in the treated group. The same results were not observed in the placebo group.

O objetivo deste estudo foi avaliar a eficácia da terapia com laser de baixa intensidade na melhora dos movimentos mandibulares e dos sintomas dolorosos em pacientes com disfunção temporomandibular (DTM). Quarenta pacientes foram aleatoriamente divididos em dois grupos (n=20): Grupo 1 recebeu a dose efetiva (laser de AsGaAl 830 nm, 40 mW, 5 J/cm2) e Grupo 2 recebeu a aplicação placebo (0 J/cm2), no modo contínuo no pólo lateral do côndilo afetado: superior, anterior, e posterior-posterior e inferior, 2 vezes por semana, por 2 meses. Quatro avaliações foram feitas: A1 (antes da aplicação), A2 (imediatamente após a última aplicação), A3 (uma semana após a última aplicação) e A4 (um mes após a última aplicação). O teste estatístico de Kruskal-Wallis mostrou melhoras significativas (p<0,01) nos sintomas dolorosos no grupo 1, diferentemente do grupo 2. Uma melhora significativa na extensão dos movimentos mandibulares foi observada quando os resultados foram comparados entre os dois grupos na A4. A aplicação do laser é uma terapia de suporte no tratamento da DTM, uma vez que resultou em imediata redução dos sintomas dolorosos e aumento na extensão dos movimentos mandibulares no grupo experimental. Os mesmos resultados não foram observados no grupo placebo.

Avaliação do tratamento com laser de baixa intensidade na mivimentação mandibular ativa / Evaluation of the low-level therapy in active mandibular movement

O objetivo da pesquisa foi o de avaliar a influência do laser AsGaAl na amplitude dos movimentos mandibulares de abertura bucal, lateralidade direita e esquerda, e de protusão, de sujeitos com disfunção temporomandibular.Quarenta sujeitos com disfunção temporomandibular (DTMs) tiveram as amplitudes dos movimentos da mandíbula registradas, antes e após o tratamento com laser. Esses sujeitos foram divididos em dois grupos: grupo I, que receberia aplicação do laser, e grupo II, que receberia apicação placebo, sem emissão real do laser. Foi utilizado o laser AsGaAl com potência de 40mW, com 25J/cm², por 50 segundos, em quatro pontos na região da articulação temporomandibular, totalizando oito sessões. As medidas dos movimentos mandibulares foram submetidas à análise estatística, verificando-se que, para o grupo I, os resultados apresentaram-se estatisticamente significantes e, para o grupo II, não-significantes. Estes resultados indicaram que o tratamento com laser promoveu aumento nas medidas dos movimentos mandibulares de sujeitos com disfunção temporomandibular, demonstrando ser uma metodologia eficaz e auxiliar no tratamento das disfunções temporomandibulares