Apatite bone cement reinforced with calcium silicate fibers

Autor(es)

Motisuke, Mariana ^[1] ; Santos, Veronica R. ^[1] ; Bazanini, Naiana C. ^[1] ; Bertran, Celso A. ^[2]

Afiliação do(s) autor(es)

^[1] UNIFESP, Inst Sci & Technol, Bioceram Lab, Sao Jose Dos Campos, SP - Brazil

^[2] Univ Estadual Campinas, Inst Chem, Dept Phys Chem, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE; v. 25, n. 10, p. 2357-2363, OCT 2014.
• Citações Web of Science: 11

Resumo

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. The material developed presents potential properties to be employed in bone repair treatment. (AU)

• Processo FAPESP: 11/09240-9 - Otimização de cimentos de fosfato de cálcio para aplicação na ortopedia e na engenharia tecidual
• Beneficiário: Mariana Motisuke
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/07556-1 - Cimentos de fosfato de cálcio contendo whisker de CaSiO3 e gelatina: melhora da resistência mecânica e controle da porosidade
• Beneficiário: Verônica Ribeiro dos Santos
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica