Estudo histomorfométrico e imunoistoquímico dos efeitos da terapia fotodinâmica antimicrobiana no tratamento da doença periodontal induzida em ratos
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2012-02-28
Autores
Longo, Mariéllen [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Este estudo avaliou histomorfometricamente e imunoistoquimicamente os efeitos da terapia fotodinâmica antimicrobiana (aPDT), usando dois fotossensibilizadores com diferentes concentrações, como coadjuvante no tratamento da periodontite induzida em ratos. A doença periodontal (DP) foi induzida por adaptação de uma ligadura ao redor do primeiro molar inferior esquerdo em 162 ratos. Os animais foram randomicamente divididos em 9 grupos: G1 - raspagem e alisamento radicular (RAR) e irrigação com soro fisiológico; G2 - RAR e irrigação com azul de metileno (MB) (100 μg / ml); G3 - RAR e irrigação com MB (10 mg / ml); G4 - RAR e irrigação com azul de toluidina- O (TBO) (100 μg / ml); G5 - RAR e irrigação com TBO (10 mg / ml); G6 – RAR, irrigação com MB (100 μg / ml) e Laser (InGaAlP; 660nm; 4,94J/cm2/ponto; 24 segundos); G7 – RAR, irrigação com MB (10 mg / ml) e Laser; G8 – RAR, irrigação com azul de TBO (100 μg / ml) e Laser; G9 – RAR, irrigação com TBO (10 mg/ml) e Laser. A área de perda óssea (PO) na região de furca (RF) foi analisada histomorfometricamente. A quantidade de osteoclastos e os reguladores locais da atividade osteoclástica foram avaliados qualitativamente na RF via detecção imunoistoquímica de TRAP e RANKL-OPG, respectivamente. Os dados da PO foram analisados estatisticamente (P<0,05). Os animais do G1 apresentaram maior PO (2,17±0,54) comparado ao G6 (0,55±0,14), G7 (0,77±0,17) e G8 (0,73±0,17) aos 7 dias...
The aim of this study was to evaluate histomorphometric and immunohistochemical the effects of antimicrobial photodynamic therapy (aPDT), using two photosensitizers with different concentrations, as an adjunct in the treatment of induced periodontitis in rats. Periodontal disease was induced by placing a ligature around the left first mandibular molar in 162 rats. The animals were randomly divided into nine groups: G1- scaling and root planning (SRP) and irrigation with saline solution, G2- SRP and irrigation with methylene blue (MB) (100 μg/ml); G3- SRP and irrigation with MB (10 mg/ml); G4- SRP and irrigation with toluidine blue O (TBO) (100 μg/ml); G5- SRP and irrigation with TBO (10 mg/ml); G6- SRP, irrigation with MB (100 μg/ml) and Laser (InGaAlP; 660 nm; 4.94 J/cm2/point; 24 seconds); G7-SRP, irrigation with MB (10 mg/ml) and Laser; G8- SRP, irrigation with TBO (100 μg/ml) and Laser; G9- SRP, irrigation with TBO (10 mg/ml) and Laser. The area of bone loss (BL) in the furcation region (FR) was histometrically analyzed. The amount of osteoclasts and the local regulator of osteoclastic activity were evaluated qualitatively in the FR via immunohistochemical detection of TRAP and RANKL-OPG, respectively. Data were analyzed statistically (P<0.05). The animals of G1 presented more BL (2.17±0.54) compared to animals of G6 (0.55±0.14), G7 (0.77±0.17) and G8 (0.73±0.17) at 7 days. There was no statistically significant difference between the groups treated with photosensitizers or aPDT. The qualitative immunohistochemical analysis revealed that there was a tendency to decrease immunostaining of RANKL and TRAP, and a tendency to increase expression of OPG in the groups treated with aPDT/MB. The aPDT using the MB, as an adjunctive therapy to SRP was effetive to act as a downregulator in local molecular mechanisms... (Complete abstract click electronic access below)
The aim of this study was to evaluate histomorphometric and immunohistochemical the effects of antimicrobial photodynamic therapy (aPDT), using two photosensitizers with different concentrations, as an adjunct in the treatment of induced periodontitis in rats. Periodontal disease was induced by placing a ligature around the left first mandibular molar in 162 rats. The animals were randomly divided into nine groups: G1- scaling and root planning (SRP) and irrigation with saline solution, G2- SRP and irrigation with methylene blue (MB) (100 μg/ml); G3- SRP and irrigation with MB (10 mg/ml); G4- SRP and irrigation with toluidine blue O (TBO) (100 μg/ml); G5- SRP and irrigation with TBO (10 mg/ml); G6- SRP, irrigation with MB (100 μg/ml) and Laser (InGaAlP; 660 nm; 4.94 J/cm2/point; 24 seconds); G7-SRP, irrigation with MB (10 mg/ml) and Laser; G8- SRP, irrigation with TBO (100 μg/ml) and Laser; G9- SRP, irrigation with TBO (10 mg/ml) and Laser. The area of bone loss (BL) in the furcation region (FR) was histometrically analyzed. The amount of osteoclasts and the local regulator of osteoclastic activity were evaluated qualitatively in the FR via immunohistochemical detection of TRAP and RANKL-OPG, respectively. Data were analyzed statistically (P<0.05). The animals of G1 presented more BL (2.17±0.54) compared to animals of G6 (0.55±0.14), G7 (0.77±0.17) and G8 (0.73±0.17) at 7 days. There was no statistically significant difference between the groups treated with photosensitizers or aPDT. The qualitative immunohistochemical analysis revealed that there was a tendency to decrease immunostaining of RANKL and TRAP, and a tendency to increase expression of OPG in the groups treated with aPDT/MB. The aPDT using the MB, as an adjunctive therapy to SRP was effetive to act as a downregulator in local molecular mechanisms... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Doenças periodontais, Fotoquimioterapia, Lasers, Perda óssea alveolar, Periodontite
Como citar
LONGO, Mariéllen. Estudo histomorfométrico e imunoistoquímico dos efeitos da terapia fotodinâmica antimicrobiana no tratamento da doença periodontal induzida em ratos. 2012. 83 f. Dissertação (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Odontologia de Araçatuba, 2012.