Effects of microcurrent application alone or in combination with topical Hypericum perforatum L. and Arnica montana L. on surgically induced wound healing in Wistar rats.

OBJECTIVES: This study evaluated the wound healing activity of microcurrent application alone or in combination with topical Hypericum perforatum L. and Arnica montana L. on skin surgical incision surgically induced on the back of Wistar rats. DESIGN: The animals were randomly divided into six groups: (1) no intervention (control group); (2) microcurrent application (10 µA/2 min); (3) topical application of gel containing H. perforatum; (4) topical application of H. perforatum gel and microcurrent (10 µA/2 min); (5) topical application of gel containing A. montana; (6) topical application of A. montana gel and microcurrent (10 µA/2 min). Tissue samples were obtained on the 2nd, 6th and 10th days after injury and submitted to structural and morphometric analysis. RESULTS AND CONCLUSION: Differences in wound healing were observed between treatments when compared to the control group. Microcurrent application alone or combined with H. perforatum gel or A. montana gel exerted significant effects on wound healing in this experimental model in all of the study parameters (P<0.05) when compared to the control group with positive effects seen regarding newly formed tissue, number of newly formed blood vessels and percentage of mature collagen fibers. The morphometric data confirmed the structural findings. In conclusion, application of H. perforatum or A. montana was effective on experimental wound healing when compared to control, but significant differences in the parameters studied were only observed when these treatments were combined with microcurrent application.

Algumas alterações morfológicas que dificultam o tratamento endodôntico / The some morphology alterations that makes difficult on the endodontic treatment

Para a realização de um tratamento endodôntico com sucesso o exame radiográfico se torna fundamental pois permite a visualização da câmara pulpar e condutos radiculares pois esses podem se apresentar com alterações dificultando ou até mesmo impossibilitando a intervenção endodôntica. Dens in dente, taurodontia, dilaceração, geminação e fusão, raízes supranumerárias são as alterações mais frequentemente encontradas dificultando o acesso e/ou instrumentação da câmara pulpar e canais radiculares. Tendo em vista essas alterações é de fundamental importância o estudo adequado de cada caso e conhecimento das alterações para que não haja surpresa no tratamento de pacientes especiais.