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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avaliação do papel da fibrina rica em plaquetas em defeito crítico cirurgicamente criado em calota de ratos induzidos à hipercolesterolemia tratados ou não com atorvastatina / Evaluation of the role of Platelet Rich Fibrin in surgical critical-size calvarial defect in rats with diet-induced hypercholesterolemia treated or not with atorvastatin

Oliva, André Hergesel de [UNESP] 06 February 2018 (has links)
Submitted by André Hergesel de Oliva null (holivaandre@gmail.com) on 2018-02-19T13:16:08Z No. of bitstreams: 1 Dissertação_MestradoCORRIGIDO.pdf: 2514302 bytes, checksum: 2de51633e693041838c21d79e951b406 (MD5) / Approved for entry into archive by Ana Paula Rimoli de Oliveira null (anapaula@foa.unesp.br) on 2018-02-19T14:23:57Z (GMT) No. of bitstreams: 1 oliva_ah_me_araca_int.pdf: 2514302 bytes, checksum: 2de51633e693041838c21d79e951b406 (MD5) / Made available in DSpace on 2018-02-19T14:23:57Z (GMT). No. of bitstreams: 1 oliva_ah_me_araca_int.pdf: 2514302 bytes, checksum: 2de51633e693041838c21d79e951b406 (MD5) Previous issue date: 2018-02-06 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Esse estudo objetivou-se em avaliar o papel da membrana de fibrina rica em plaquetas na reparação óssea em defeito crítico de calota de ratos induzidos à hipercolesterolemia, bem como a atuação do tratamento de atorvastatina nesse processo. Quarenta defeitos críticos de 6 mm de diâmetro foram criados em calotas cranianas de ratos. Cada defeito foi aleatoriamente dividido em 8 grupos experimentais (GC, GCPRF, GCA, GCH, GHA, GPRFA, GPRFH, GPRFHA), avaliados aos 28 dias pós-operatórios com análises histológica e microtomográfica. Os resultados mostraram que houve formação óssea em todos os grupos analisados. O grupo GPRFH apresentou formação óssea mais acentuada com relação aos demais grupos. Dos grupos em que foi administrado atorvastatina, o GPRFHA apresentou maior taxa de formação óssea (p < 0,05). Com a metodologia utilizada, a fibrina rica em plaquetas, quando associada à condição de hipercolesterolemia, induziu ao aumento da formação óssea. / Objectives: The aim of this study was to evaluate the efficacy of Platelet Rich Fibrin (PRF) in the healing process of surgically created critical-size defects in rat calvarial induced to hypercholesterolemia treated or not with atorvastatin. Materials and method: 40 critical defects were created with 6 mm diameter calvaria of rats. Each defect was randomly divided into eight experimental groups (GC, GCPRF, GCA, GCH, GHA, GPRFA, GPRFH, GPRFHA), evaluated at 28 postoperative days for histomorphometry and microtomography. Results: The results showed new bone formation in all groups. The GPRFH group just did differ from all groups in the new bone formation (p < 0.05). Among the groups treated with atorvastatin, the GPRFHA group showed the highest bone formation rate. Conclusion: With the methodology used, the platelet-rich fibrin associated with the hypercholesterolemia induced to new bone formation. Clinical relevance: Based on these results, it is necessary to unveil the mechanisms of the association of platelet-rich fibrin with hypercholesterolemia and how it interferes in PRF microstructure and bone regeneration, to confer clinical predictability in patients in this condition who will undergo bone reconstruction and implant rehabilitation.

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