incorporation by host tissue of two biomaterials used as repair of defects produced in abdominal wall of rats incorporação por tecido do hospedeiro de dois biomateriais usados como reparo de defeitos produzido em parede abdominal de ratos

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ID: 173620
2008
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Abstract
PURPOSE: Biomaterials may be used as treatment of great abdominal wall defects to avoid tension during repair. In the present research we intended to investigate incorporation type by host tissue of membranes of microbial cellulose (MC), produced by the bacteria Zoogloea sp., and of polytetrafluoroethylene (ePTFE) in abdominal wall defects of rats. METHODS: Sixty male rats Wistar, anesthetized by ketamine (5mg/100g) and xylazine (2mg/100g), were submitted to a rectangular excision (2x3cm) of the abdominal wall, including fascia, muscles and peritoneum and further treated with implants of microbial cellulose (MC Group - 30 animals) or expanded polytetrafluoroethylene ( ePTFE Group- 30 animals). Each group was subdivided in 14th DPO, 28th DPO and 60th DPO Subgroups. RESULTS: Incorporation of biomaterials was observed by wrapping and infiltration by host tissue. It has been found that wrapping associated to infiltration of host connective tissue in implants of ePTFE were present in 100% of the observed samples, and this may be responsible for increase resistance to traction. Inversely, wrapping without host tissue infiltration was seen in 100% of examined specimens of MC implants. CONCLUSION: Wrapping and host tissue infiltration is seen only in ePTFE implants.
OBJETIVO: Biomateriais podem ser usados como tratamento de grandes defeitos da parede abdominal para evitar tensão durante reparo. Na presente pesquisa pretendeu-se investigar o tipo de incorporação pelo tecido do hospedeiro de membranas de celulose microbiana (CM), produzidas pela bactérias Zoogloea sp., e de politetrafluoretileno (PTFEe) em defeitos da parede abdominal de ratos. MÉTODOS: Sessenta ratos machos Wistar, anestesiados através de cetamina (5mg/100g) e xilazina (2mg/100g), foram submetidos a uma excisão retangular (2x3cm) da parede abdominal, incluindo fascia, músculos e peritoneum e posteriormente tratadas com implantes de celulose microbiana (Groupo CM - 30 animais) ou politetrafluoretileno (Grupo PTFEe - 30 animais). Cada grupo foi subdividido em Subgrupos14º DPO, 28º DPO e 60º DPO. RESULTADOS: Incorporação do biomaterial foi observada através de envoltório e infiltração pelo tecido do receptor. Foi encontrado que o envoltório associado à infiltração de tecido conjuntivo do hospedeiro em implantes de ePTFE estava presente em 100% das amostras observadas, podendo ser responsável por aumento da resistência à tração. Inversamente, envoltório sem infiltração de tecido do hospedeiro foi visto em 100% dos espécimes examinados nos implantes de CM. CONCLUSÕES: Pode-se ser concluído que o envoltório associado à infiltração de tecido do hospedeiro só é vista nos implantes de PTFEe.
Reference Key
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Authors ;Suyiene Cordeiro Falcão;Joaquim Evêncio Neto;Antônio Roberto de Barros Coelho
Journal forensic science international
Year 2008
DOI
10.1590/S0102-86502008000100013
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502008000100013
Keywords
ratssurgery abdominal defect

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