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Master's Dissertation
DOI
https://doi.org/10.11606/D.58.2008.tde-30062008-150532
Document
Author
Full name
Annelissa Zorzeto Rodrigues
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2008
Supervisor
Committee
Novaes Junior, Arthur Belem (President)
Oliveira, Paulo Tambasco de
Papalexiou, Vula
Title in Portuguese
Avaliação in vitro do cultivo de fibroblastos gengivais humanos em matriz dérmica acelular
Keywords in Portuguese
fibroblastos gengivais humanos
matriz dérmica acelular
Abstract in Portuguese
A matriz démica acelular, MDA, figura dentre os biomateriais que têm por objetivo restaurar defeitos mucogengivais. A correção de defeitos mucogengivais a partir de constituintes autógenos são os procedimentos mais comumente usados, no entanto, em decorrência da quantidade insuficiente de tecido doador, esses procedimentos se tornam limitados. Diante disso, o objetivo desse estudo foi avaliar, in vitro, diferentes aspectos relacionados ao cultivo prévio de fibroblastos gengivais humanos em MDA. Fibroblastos gengivais humanos foram cultivados pela técnica do explante a partir de amostras de tecido gengival queratinizado removido de três pacientes saudáveis. A MDA foi cultivada com esses fibroblastos por períodos de 14 e 21 dias para posterior análise dos eventos de: adesão celular, proliferação e viabilidade. Os resultados mostraram que em 7 dias, os fibroblastos estavam aderidos, espraiados e dispersos sobre a superfície externa da MDA, em 14 dias formavam monocamada de células de morfologia alongada e quiescentes (Ki-67 negativos) em sua maioria, sendo apenas ocasionalmente observadas no interior da MDA. Em 21 dias a monocamada exibia menor densidade celular. Os resultados sugerem que o cultivo de fibroblastos em MDA em períodos de 14 dias permite boas condições de adesão e espraiamento das células sobre a matriz, porém, a alta densidade de fibras colágenas parece ser um fator limitante à migração celular.
Title in English
Evaluation of in vitro human gingival fibroblasts on the acellular dermal matrix
Keywords in English
acellular dermal matrix
human gingival fibroblasts
Abstract in English
Acellular Dermal Matrix, ADM, is a biomaterial that has been used in periodontal procedures to treat mucogingival defects. Mucogingival defects can be corrected by autogenous grafts that are the most common procedure used in periodontology, however, because of the limited source of donor's tissue this procedure became limited. The aim of this investigation was to verify, in vitro, different aspects related to human gingival fibroblasts seeding on to the ADM. Human gingival fibroblasts were established from explant cultures from the connective tissue of keratinized gingiva collected from three healthy patients. ADM was seeded with gingival fibroblasts for 14 and 21 days, and then cell adherence, proliferation and viability were analyzed. Results revealed that, at day 7, fibroblasts were adherent and spreading on the ADM surface, and were unevenly distributed, forming a discontinuous single cell layer, at day 14, a confluent fibroblastic monolayer lining ADM surface was noticed. At day 21, the cell monolayer exhibited a reduction in cell density. The results suggests that fibroblasts seeding on the ADM for 14 days can allow good conditions for cell adhesion and spread on the matrix, however, because of the high collagen fiber bundle density cell, migration inside the matrix was limited.
 
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me_annelissa.pdf (1.28 Mbytes)
Publishing Date
2008-07-25
 
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