A randomized placebo-blind study of the effect of low power laser on pain caused by irreversible pulpitis

Autor(es)

Ramalho, Karen Muller ; Paladini de Souza, Larissa Marcondes ; Tortamano, Isabel Peixoto ; Adde, Carlos Alberto ; Rocha, Rodney Garcia ; Eduardo, Carlos de Paula

• Tipo de documento: Artigo Científico
• Fonte: Lasers in Medical Science; v. 31, n. 9, p. 1899-1905, DEC 2016.
• Citações Web of Science: 2

Resumo

This randomized placebo-blind study aimed to evaluate the effect of laser phototherapy (LPT) on pain caused by symptomatic irreversible pulpitis (SIP). Sixty patients diagnosed with SIP were randomly assigned to treatment groups (n = 15): G1 (control), G2 (laser placebo-sham irradiation), G3 (laser irradiation at 780 nm, 40 mW, 4 J/cm(2)), and G4 (laser irradiation at 780 nm, 40 mW, 40 J/cm(2)). Spontaneous pain was recorded using a VAS score before (T0), immediately after (T1), and 15 min after treatment (T2). Local anesthetics failure during emergency endodontic treatment was also assessed. There was no pain difference in T1 and T2 between the experimental laser groups (G3 and G4) and the placebo group (G2). The 4-J/cm(2) (G3) irradiation resulted in significant increase in the local anesthetics failure in lower jar teeth. This effect could be suggested as consequence of the LPT improvement in local circulation and vasodilatation that would result in the increase of local anesthetic agent absorption. The application of 780-nm diode laser irradiation, at 4 and 40 J/cm(2), showed no effect in reducing the pain in SIP in comparison to the placebo group. The fluence of 4 J/cm(2) showed a negative effect in local anesthetics, resulting in significant increase of complimentary local anesthesia during emergency endodontic treatment. This work provides evidence of the consequence of LPT application on teeth with symptomatic irreversible pulpitis. LPT should be avoided in teeth with pain due to irreversible pulpitis. (AU)

• Processo FAPESP: 12/21670-1 - Avaliação do efeito analgésico do laser em baixa intensidade em pacientes com pulpite aguda: estudo randomizado, duplo-cego
• Beneficiário: Lárissa Marcondes Paladini de Souza
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 13/12317-9 - Avaliação da terapia fotodinâmica aplicada no tratamento de herpes labial. Estudo in vivo,randomizado e cego.
• Beneficiário: Karen Muller Ramalho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado