کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6482079 43 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of amorphous phases during the hydraulic conversion of α-TCP into calcium-deficient hydroxyapatite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Effect of amorphous phases during the hydraulic conversion of α-TCP into calcium-deficient hydroxyapatite
چکیده انگلیسی
Powders of α-tricalcium phosphate (α-TCP), which readily react with water to form calcium-deficient hydroxyapatite (CDHA), are frequently used in bone cements. As, for clinical applications, it is important to adjust the setting reaction of the cements to a reasonable reaction time, exact knowledge of the hydration mechanism is essential. It is known that prolonged milling results in partial amorphization of α-TCP powders and that dissolution of the amorphous phase significantly accelerates the hydration, but it is not clear yet when the amorphous phase reacts in comparison to the crystalline α-TCP. Therefore the aim of this study was to investigate the development of quantitative phase content of α-TCP samples during hydration.For this purpose, three α-TCP powders, containing 0, 16 and 71 wt.% of amorphous phase (ATCP), were mixed with either deionized water or a 0.1 M Na2HPO4 aqueous solution. The crystalline evolution of the paste was assessed quantitatively during the first 48 h of hydration at 23 °C by G-factor quantification. The present investigations demonstrate that ATCP reacted earlier than crystalline α-TCP. The results also suggest the formation of an X-ray amorphous phase during the hydraulic conversion formation of α-TCP into CDHA.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Biomaterialia - Volume 10, Issue 9, September 2014, Pages 3931-3941
نویسندگان
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