Tissue response evaluation of the mucosa of the tympanic cavity of guinea pigs, when receiving biodegradable implant
Garcia, Leandro de Borborema
Cunha Junior, Armando da Silva
Fialho, Silvia Ligório
Perez, André Coura
Barros, Bruno Borges de Carvalho
Dorigueto, Ricardo Schaffeln [UNIFESP]
Testa, Jose Ricardo Gurgel [UNIFESP]
Is part ofActa Cirurgica Brasileira
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PURPOSE:To evaluate the tissue response of the mucosa of the tympanic cavity of guinea pigs, when receiving biodegradable implant.METHODS:A total of 20 male guinea pigs were divided into 2 groups. After paracentesis in both ears, a biodegradable polymer of poly lactic-co-glycolic acid was implanted in only one middle ear. Histological analysis using neutrophil exudate and vascular neoformation (acute inflammation) and fibroblast proliferation and mononuclear inflammatory cells (chronic inflammation) as parameters was performed after 10 and 30 days of survival (groups 1 and 2, respectively).RESULTS:Four ears in group 1 and 7 in group 2 had an increase of neutrophil exudate. Vascular neoformation occurred in ears with or without the implant, in both groups. Fibroblast proliferation and mononuclear inflammatory cells (lymphocytes and macrophages) increased in ears with implant in group 2.CONCLUSION:The tissue response by histological analysis of the mucosa of the tympanic cavity of guinea pigs, when receiving biodegradable implant, showed no statistically significant difference between ears with or without the implant.
CitationActa Cirurgica Brasileira. Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia, v. 29, p. 12-18, 2014.
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