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Sökning: WFRF:(Mestres Gemma 1984 ) > Influence of Si sub...

Influence of Si substitution on the reactivity of α-tricalcium phosphate

Motisuke, Mariana (författare)
Bioceramics Laboratory, Science and Technology Institute, UNIFESP, 12231-280 São José dos Campos, SP, Brazil
Mestres, Gemma, 1984- (författare)
Uppsala universitet,Mikrosystemteknik,MST/EMBLA
Renó, Caroline O. (författare)
Bioceramics Laboratory, Science and Technology Institute, UNIFESP, 12231-280 São José dos Campos, SP, Brazil
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Carrodeguas, Raúl G. (författare)
Department of Ceramics, Institute of Ceramics and Glass (ICV), CSIC, Kelsen 5, 28049 Madrid, Spain
Zavaglia, Cecília A.C. (författare)
Labiomec, Mechanical Engineering School, State University of Campinas, 13083-860 Campinas, SP, Brazil
Ginebra, Maria-Pau (författare)
Engineering Sciences and Metallurgy Dpt., Technical University of Catalonia, Diagonal 647, 08028 Barcelona, Spain,Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering
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 (creator_code:org_t)
Elsevier BV, 2017
2017
Engelska.
Ingår i: Materials science & engineering. C, biomimetic materials, sensors and systems. - : Elsevier BV. - 0928-4931 .- 1873-0191. ; 75, s. 816-821
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Silicon substituted calcium phosphates have been widely studied over the last ten years due to their enhanced osteogenic properties. Notwithstanding, the role of silicon on α-TCP reactivity is not clear yet. Therefore, the aim of this work was to evaluate the reactivity and the properties of Si-α-TCP in comparison to α-TCP. Precursor powders have similar properties regarding purity, particle size distribution and specific surface area, which allowed a better comparison of the Si effects on their reactivity and cements properties. Both Si-α-TCP and α-TCP hydrolyzed to a calcium-deficient hydroxyapatite when mixed with water but their conversion rates were different. Si-α-TCP exhibited a slower setting rate than α-TCP, i.e. kSSA for Si-TCP (0.021 g·m− 2·h− 1) was almost four times lower than for α-TCP (0.072 g·m− 2·h− 1). On the other hand, the compressive strength of the CPC resulting from fully reacted Si-α-TCP was significantly higher (12.80 ± 0.38 MPa) than that of α-TCP (11.44 ± 0.54 MPa), due to the smaller size of the entangled precipitated apatite crystals.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)

Nyckelord

α-Tricalcium phosphate
Calcium phosphate cement
Kinetics
Silicon

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