Long-Term Effects of a Single Application of Botulinum Toxin Type A in Temporomandibular Myofascial Pain Patients: A Controlled Clinical Trial

Autor(es)

Canales, Giancarlo De la Torre ; Camara-Souza, Mariana Barbosa ; Poluha, Rodrigo Lorenzi ; Costa de Figueredo, Olivia Maria ; de Souza Nobre, Bryanne Brissian ; Ernberg, Malin ; Rodrigues Conti, Paulo Cesar ; Rizzatti-Barbosa, Celia Marisa

• Tipo de documento: Artigo Científico
• Fonte: TOXINS; v. 14, n. 11, p. 9-pg., 2022-11-01.

Resumo

This study assessed the long-term effects of botulinum toxin type A (BoNT-A) in subjective pain, pain sensibility, and muscle thickness in persistent myofascial temporomandibular-disorder pain (MFP-TMD) patients. Fourteen female subjects with persistent MFP received BoNT-A treatment with different doses (10U-25U for temporalis muscle and 30U-75U for masseter muscle). The treatment was injected bilaterally in the masseter and anterior temporalis muscles in a single session. Clinical measurements included: self-perceived pain (VAS), pain sensibility (PPT), and muscles thickness (ultrasonography). Follow-up occurred 1, 3, 6, and 72 months after treatment for VAS and PPT and 1, 3, and 72 months for ultrasonography. For statistical analysis, the Friedman test with the Bonferroni test for multiple comparisons as a post hoc test was used for non-parametric repeated measures comparisons among the evaluation times. A 5% probability level was considered significant in all tests. VAS values presented a significant decrease throughout the study (p < 0.05). Regarding PPT values, a significant increase was found when comparing baseline data with post-treatment follow-ups (p < 0.05), and even though a significant decrease was found in muscle thickness when baseline values were compared with the 1- and 3-months assessments, no differences were found when compared with the 72 months follow-up (p > 0.05). A single injection of BoNT-A presents long-term effects in reducing pain in persistent MFP-TMD patients, and a reversibility of adverse effects on masticatory-muscle thickness. (AU)

• Processo FAPESP: 17/23429-3 - Influência das terapias comportamentais sobre o bruxismo de vigília, fatores biopsicossociais e níveis de dor orofacial: ensaio clínico randomizado controlado
• Beneficiário: Mariana Barbosa Câmara de Souza
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/21674-0 - Comparação da eficácia da toxina botulínica tipo A em pacientes com dor orofacial crônica refratária, de acordo com diferentes perfis somatosensoriais
• Beneficiário: Giancarlo de La Torre Canales
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado