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Publikācija: Changes in Phase Composition and Mechanical Strength during Aging of Calcium Phosphate Cements

Publication Type Conference paper
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Changes in Phase Composition and Mechanical Strength during Aging of Calcium Phosphate Cements
Field of research 2. Engineering and technology
Sub-field of research 2.5 Materials engineering
Authors Zilgma Irbe
Līga Bērziņa-Cimdiņa
Jānis Ločs
Keywords Biomaterials, bone cement, calcium phosphate cements, calcium phosphates
Abstract In this work the changes in compressive strength and phase composition in respect of aging time of alpha-tricalcium phosphate (α-TCP) cements are examined. The increase of compressiove strength is time and initial pH dependent. Increase of aging time and initial pH leads to the increase of mechanical properties. A compressive strength up to 15 MPa was reached for cements with powder/liquid ratio 1.75g/1ml and initial liquid phase pH 8. More rapid conversion of α-TCP to hydroxyapatite occours at higher liquid phase pH values. The lower compressive strength of cements with acidic initial liquid phase pH can be explained by slower conversion of α-TCP and higher porosity after setting. The best setting and mechanical properties was achieved for cements with basic initial pH (8).
Reference Irbe, Z., Bērziņa-Cimdiņa, L., Ločs, J. Changes in Phase Composition and Mechanical Strength during Aging of Calcium Phosphate Cements. In: Transactions of 9th World Biomaterials Congress (WBC), China, Chengdu, 1-5 June, 2012. Chengdu: WBC, 2012, pp.1-1.
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