Artículos de revistas
Apatite Bone Cement Reinforced With Calcium Silicate Fibers
Registro en:
Journal Of Materials Science: Materials In Medicine. Kluwer Academic Publishers, v. 25, n. 10, p. 2357 - 2363, 2014.
9574530
10.1007/s10856-014-5280-7
2-s2.0-84918798341
Autor
Motisuke M.
Santos V.R.
Bazanini N.C.
Bertran C.A.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Several research efforts have been made in the attempt to reinforce calcium phosphate cements (CPCs) with polymeric and carbon fibers. Due to their low compatibility with the cement matrix, results were not satisfactory. In this context, calcium silicate fibers (CaSiO3) may be an alternative material to overcome the main drawback of reinforced CPCs since, despite of their good mechanical properties, they may interact chemically with the CPC matrix. In this work CaSiO3 fibers, with aspect ratio of 9.6, were synthesized by a reactive molten salt synthesis and used as reinforcement in apatite cement. 5 wt.% of reinforcement addition has increased the compressive strength of the CPC by 250 % (from 14.5 to 50.4 MPa) without preventing the cement to set. Ca and Si release in samples containing fibers could be explained by CaSiO3 partial hydrolysis which leads to a quick increase in Ca concentration and in silica gel precipitation. The latter may be responsible for apatite precipitation in needle like form during cement setting reaction. 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