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dc.contributor.authorAjaxon, Ingrid
dc.contributor.authorMaazouz, Yassine
dc.contributor.authorGinebra Molins, Maria Pau
dc.contributor.authorOhman, Caroline
dc.contributor.authorPersson, Cecilia
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.identifier.citationAjaxon, I., Maazouz, Y., Ginebra, M.P., Ohman, C., Persson, C. Evaluation of a porosity measurement method for wet calcium phosphate cements. "Journal of biomaterials applications", 2015, vol. 30, núm. 5, p. 526-536.
dc.description.abstractThe porosity of a calcium phosphate cement is a key parameter as it affects several important properties of the cement. However, a successful, non-destructive porosity measurement method that does not include drying has not yet been reported for calcium phosphate cements. The aim of this study was to evaluate isopropanol solvent exchange as such a method. Two different types of calcium phosphate cements were used, one basic (hydroxyapatite) and one acidic (brushite). The cements were allowed to set in an aqueous environment and then immersed in isopropanol and stored under three different conditions: at room temperature, at room temperature under vacuum (300¿mbar) or at 37¿. The specimen mass was monitored regularly. Solvent exchange took much longer time to reach steady state in hydroxyapatite cements compared to brushite cements, 350 and 18¿h, respectively. Furthermore, the immersion affected the quasi-static compressive strength of the hydroxyapatite cements. However, the strength and phase composition of the brushite cements were not affected by isopropanol immersion, suggesting that isopropanol solvent exchange can be used for brushite calcium phosphate cements. The main advantages with this method are that it is non-destructive, fast, easy and the porosity can be evaluated while the cements remain wet, allowing for further analysis on the same specimen
dc.format.extent11 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshBone cements
dc.subject.lcshCalcium phosphate
dc.subject.otherCalcium phosphate
dc.subject.otherbone cement
dc.subject.othersolvent exchange
dc.titleEvaluation of a porosity measurement method for wet calcium phosphate cements
dc.subject.lemacFosfat de calci
dc.subject.lemacCiments ossis
dc.contributor.groupUniversitat Politècnica de Catalunya. BBT - Biomaterials, Biomecànica i Enginyeria de Teixits
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
dc.contributor.covenanteeUppsala universitet
local.citation.authorAjaxon, I.; Maazouz, Y.; Ginebra, M.P.; Ohman, C.; Persson, C.
local.citation.publicationNameJournal of biomaterials applications

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