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Publikācija: Development of Mg-Containing Porous β-Tricalcium Phosphate Scaffolds for Bone Repair

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Development of Mg-Containing Porous β-Tricalcium Phosphate Scaffolds for Bone Repair
Field of research 2. Engineering and technology
Sub-field of research 2.5 Materials engineering
Authors Kristīne Šalma-Ancāne
Līga Stīpniece
Andris Putniņš
Līga Bērziņa-Cimdiņa
Keywords β-tricalcium phosphate; Porous bioceramic; Magnesium substitution
Abstract Apatitic tricalcium phosphate (ap-TCP) powders containing Mg were synthesized through wet chemical precipitation method from CaO and H3PO4, using MgO as the source of Mg substitution. The influence of small, close to bone-like amounts of Mg on the thermal stability and specific surface area (SSA) of as-synthesized ap-TCP powders was evaluated. The increase in Mg content up to 0.674±0.080 wt% promoted enlarging of SSA of the as-synthesized powders between 91.3 m2/g and 104.2 m2/g and the stabilization of the β-tricalcium phosphate (β-TCP) phase up to 1360 °C. The effect of Mg substitution on porosity and microstructure was investigated. Interconnected porous Mg-containing β-TCP scaffolds, with micro-, macroporous structures were developed by an in situ foaming of viscous mass of proper slurry prepared of the as-synthesized ap-TCP powders, using NH4HCO3 as a foaming agent, and subsequent sintering at 1150 °C for 2 h. The self-dissolution behavior in vitro was evaluated through soaking of scaffolds in SBF. The release of Ca and Mg ions from the 3D micro-, macroporous β-TCP scaffolds containing various amounts of Mg was determined by a complexometric (EDTA) titration. The samples with increased Mg concentrations showed significantly enhanced Mg-release rate in comparison to the samples with lower Mg substitution level.
DOI: 10.1016/j.ceramint.2014.12.065
Hyperlink: http://www.sciencedirect.com/science/article/pii/S0272884214019865 
Reference Šalma-Ancāne, K., Stīpniece, L., Putniņš, A., Bērziņa-Cimdiņa, L. Development of Mg-Containing Porous β-Tricalcium Phosphate Scaffolds for Bone Repair. Ceramics International, 2015, Vol.41, Iss.3, Part B, pp.4996-5004. ISSN 0272-8842. Available from: doi:10.1016/j.ceramint.2014.12.065
Additional information Citation count:
ID 20347