| Summary: | Submitted by Setor de Tratamento da Informa??o - BC/PUCRS (tede2@pucrs.br) on 2015-07-07T13:31:06Z
No. of bitstreams: 1
471664 - Texto Completo.pdf: 1025603 bytes, checksum: cc2bf12cfe7084c63f710f9fd2c36364 (MD5) === Made available in DSpace on 2015-07-07T13:31:06Z (GMT). No. of bitstreams: 1
471664 - Texto Completo.pdf: 1025603 bytes, checksum: cc2bf12cfe7084c63f710f9fd2c36364 (MD5)
Previous issue date: 2015-03-25 === The repair of injured peripheral nerves is one of the most difficult tasks in neurosurgery. Among the techniques used is distinguished using the artificial tube for nerve guidance during the regeneration process. The preparation of composites based on biodegradable polymers and conducting polymers related to growth factors, have been proposed as a promising approach for improving regeneration of injured peripheral nerves. However, it should be considered that during the regeneration process is necessary to have a control over the dosage and the time of release of the drug in question not to jeopardize the recovery process.In this work were based membranes prepared PLGA (lactic-co-glycolic poly-acid), polypyrrole (PPy) and Tacrolimus as a growth factor. Was reported as a factor of the process of degradation and the relationship between the composition of membrane PLGA / PPy / Tacrolimus with the release of the drug in the first days of incubation. It was found that membranes with higher PLGA thicker, resulting in a lower weight loss and delayed release of Tacrolimus. In this work PLGA membranes containing search polypyrrole nanofibers (PPy) and Tacrolimus, as a growth factor, were prepared by the solvent evaporation method. The process of degradation and drug release were assessed 28 days of incubation. It was observed that membranes with a higher concentration of PLGA. === A repara??o de nervos perif?ricos lesionados ? uma das tarefas mais dif?ceis na neurocirurgia. Entre as t?cnicas utilizadas destaca-se a utiliza??o de tubos artificiais para orientar o nervo durante o processo de regenera??o. A prepara??o de comp?sitos baseados em pol?meros biodegrad?veis e pol?meros condutores, associados a fatores de crescimento, t?m sido proposta como uma abordagem promissora para melhorar a regenera??o de nervos perif?ricos lesionados. Por?m, deve ser considerado que durante o processo de regenera??o ? necess?rio ter um controle sobre a dosagem e o tempo de libera??o do f?rmaco em quest?o para n?o prejudicar o processo de recupera??o.Assim, neste trabalho foram preparadas membranas baseadas em PLGA (poli-?cido l?ctico-co-glic?lico), polipirrol (PPy) e Tacrolimus como fator de crescimento. Foi avaliado o processo de degrada??o e a rela??o entre a composi??o de membranas de PLGA/PPy/Tacrolimus com a libera??o do f?rmaco nos primeiros dias de incuba??o. Foi verificado que membrana com maior quantidade de PLGA, mais espessa, resultou numa menor perda massa e retardou a libera??o do tacrolimus. Neste trabalho de pesquisa membranas de PLGA contendo nanofibras de polipirrol (PPy) e Tacrolimus, como fator de crescimento, foram preparadas por meio da metodologia da evapora??o do solvente. O processo de degrada??o e a libera??o do f?rmaco foram avaliados durante 28 dias de incuba??o. Foi observado que membranas com uma maior concentra??o do PLGA.
|
|---|
