A single session of antimicrobial photodynamic therapy does not influence the alveolar repair process in rats

Autor(es)

Poleti, Marcelo Lupion ; Freire Fernandes, Thais Maria ; Cardoso, Camila Lopes ; Araujo-Pires, Ana Claudia ; de Assis, Gerson Francisco ; Garlet, Gustavo Pompermaier ; Kurachi, Cristina ; Bagnato, Vanderlei Salvador ; Fischer Rubira-Bullen, Izabel Regina

• Tipo de documento: Artigo Científico
• Fonte: BRAZILIAN ORAL RESEARCH; v. 36, p. 12-pg., 2022-01-01.

Resumo

The aim of this study was to use microscopic and molecular techniques to evaluate the effects of a single session of antimicrobial photodynamic therapy (aPDT) on the alveolar repair process after tooth extraction in rats. The study sample included 84 rats divided into four groups, as follows: a) Control - untreated socket; b) Laser - socket treated using photobiomodulation; c) TBO - socket treated with topic application of the photosensitizer agent, toluidine blue O (TBO); and d) aPDT - socket treated with TBO and laser irradiation. An additional rat was used for thermal mapping during socket irradiation. The animals were euthanatized at 6, 15, and 28 days after unilateral extraction of the upper incisor. Quantitative and qualitative analyses of the connective and bone tissues, blood clot, blood vessel, and inflammatory infiltrate were performed, and real-time polymerase chain reaction was used to study the expression of genes (collagen type I, osteocalcin, alkaline phosphatase [ALP], runt-related transcription factor 2 [RUNX2], and vascular endothelial growth factor [VEGF]) involved in the bone healing process. No statistically significant differences in microscopic and molecular outcomes were observed between the groups ( p > 0.05). A positive correlation was seen to exist between blood clot and VEGF (p = 0.000), and a negative correlation was observed between bone tissue and ALP (p = 0.028) and blood vessel and VEGF (p = 0.018). A single session of aPDT in the dental extraction site did not influence the alveolar repair process in rats. (AU)

• Processo FAPESP: 07/07373-6 - Análises morfométrica, molecular e radiográfica da terapia fotodinâmica antimicrobiana após exodontia em ratos wistar.
• Beneficiário: Izabel Regina Fischer Rubira Bullen
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/07276-1 - CEPOF - Centro de Pesquisa em Óptica e Fotônica
• Beneficiário: Vanderlei Salvador Bagnato
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs