Compósito de colágeno com silicato e hidroxiapatita como material para endodontia / Collagen composite with silicate and hydroxyapatite as material for endodontic applications
AUTOR(ES)
Miguel Antônio Menezes E Gues
DATA DE PUBLICAÇÃO
2005
RESUMO
In this work was prepared and characterized collagen composites with silicate and hydroxyapatite for pulp capping; post pulpotomy usage, as endodontic material. Even though materials for this purpose are available, in most case they suffer degradation in the repair zone when. Was used type I collagen in the form anionic mixed with silicate (white Portland cement) and hydroxyapatite in various proportions. The materials were characterized by standard differential scanning calorimetry (DSC), thermogravimetry (TG), scanning electronic microscopy (SEM) and infrared spectroscopy (FTIR), energy dispersion X-Ray (EDX). The presence of the collagen in the composite was checked via the thermal transitions typical for collagen type I ( APPROXIMATE 48 Celsius degrees), independently of the proportion used and also via MEV, in which the collagenic fibers could also be seen interconnecting the silicate particles. For the amounts of collagen used, we find the chemical composition of the composites is essentially the same as that of the silicate we started with. This results showed that the structure of the collagenic matrix in the composite studied is not altered an important feature for the use of the proposed materials in endodontic applications aiming at repairing the relevant tissues in a more natural way
ASSUNTO(S)
hydroxiapatite hidroxiapatita endodontic endodontia compósito de colágeno collagen composite
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