Implante dérmico acelular sintético no subcutâneo e na superfície da pele de cobaias

• Ano de defesa: 2015
• Autor(a) principal: Natsuaki, Kryscia Leiko [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Pele; Implantes artificiais; Cobaias; Celulose bacteriana; Celulose - Biodegradação; Cellulose - Biodegradation
• Link de acesso: http://hdl.handle.net/11449/142996; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/08-07-2016/000865259.pdf

The Nanoskin® is a bacterial cellulose film produced by the bacteria Acetobacter xylinum by means of a biotechnological process. It is composed by a network of nanofibrils whose structure creates a large surface area, which allows the retention of a large amount of water and significant changes in its shape without losing its structural characteristics. Purpose: aiming to add new possibilities for the reconstruction of the eyelid, in its superficial or deep lamellae, this study was developed in order to assess whether the Nanoskin® film could be an option. Method: 40 male guinea pig were used, that received Nanoskin® fragments in the dorsal region, in two studies, one directed to the use of Nanoskin® in deep tissue when the biomaterial was placed subcutaneously and another in which the Nanoskin® was placed on skin surface. In both studies we used two types of Nanoskin: group 1 (G1), which was used Nanoskin® film (2x2 cm) without gelatin coating on the subcutaneous or on the skin surface, and Group 2 (G2), which received Nanoskin® implant (2X2 cm) with gelatin coating on the subcutaneous and on the skin surface. The control group was obtained with full-thickness skin graft placement on the size of 2X2 cm Nanoskin® adjacent to the implant in all animals in G1 and G2 experiment that studied the biomaterial on the surface of the skin. Five animals from each group were euthanized at four experimental times: 7 days (M1), 30 days (M2), 90 days (M3) and 180 days (M4). Morphometric assessments of the implant and the histological slides were held, histological and ultrastructural examination. Results: the Nanoskin® when implanted subcutaneously was not found in one animal from M3 and in five animals from M4. In moments M3, M4 and M5, there was separation between their lamellae . There was a significant inflammation at the beginning of the experiment which reduced the following times, and formation of a pseudocapsule around the ...