Analise da interface formada entre o poli (fluoreto de vinilideno), piezeletrico e não piezeletrico e o tecido muscular e osseo de ratos

AUTOR(ES)

Bianca Callegari

DATA DE PUBLICAÇÃO

2004

RESUMO

The objective of this study was to evaluate the interface formed between the poli(vinilidene) fluoride (PVDF ? piezelectric and non piezelectric) and bone rats tissue. Were used 40 PVDF [P(VDF-TrFE)] piezelectric tubes and 40 PVDF [P(VDF-TrFE)] non piezelectric tubes. In 20 animals were implanted 40 piezelectric PVDF tubes and in the other 20 animals, 40 non piezelectric PVDF tubes, followed for 7 days, 3, 6, and 12 weeks. The tubes were implanted in the femoral interncondilian region in the left foot and in the triceps muscle in the right foot. The interface formed by the tubes and the muscular tissue (n=40) and bone (n=32) was achieved by conventional optic microscopy and the removed tubes by scanning electron microscopy (n= 72). The SEM bacskattered was used to access the interface between the tube and the bone tissue without decalcifying (n=8). Around the muscular implanted tubes, there was a capsule formation without macrofage and giant cells. The piezelectric tubes removal, even from the muscular or bonetissue, was always more difficut than the non piezelectric tubes removal. It occured because there was greater tissue adhesion. The SEM showed greater adhesion and connective tissue growth around the piezelectric tubes. Around and inside the piezelectric tubes in the bone tissue, after 12 weeks, we could observe evident bone growth inside the tube. The SEM backscattered showed the boné tissue presence only inside the piezelectric tubes, after 12 weeks. The results indicate that the piezelectric effect had and important role in the new formation, even for bone or connective tissue. Probably, this new formation was due to small deformations in the piezelectric tubes, provided from the triceps contraction and from the articular movement during the march

ASSUNTO(S)

ossos piezoeletricidade

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