کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8948429 1645668 2018 71 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Silicon-doped hydroxyapatite prepared by a thermal technique for hard tissue engineering applications
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Silicon-doped hydroxyapatite prepared by a thermal technique for hard tissue engineering applications
چکیده انگلیسی
Hydroxyapatite (HA, Ca5(PO4)3OH) has been extensively used for bone implantation due to its similarity to the mineral component of bone, which makes it strongly osteoconductive. However, HA has low resorbability, and it is difficult to replace by a newly regenerated bone. Si doping can enhance the resorbability of HA by modifying its crystal structure. Here, we developed a simple thermal technique for preparing Si-doped HA from silica (SiO2) and HA precursors, both of which are inexpensive and commercially available. This method included the physical binding of SiO2 and HA particles, followed by pressing and sintering the mixture at an elevated temperature, which enhanced the atomic diffusion of Si into HA unit cells. We also evaluated the simulated body fluid (SBF) activity of the Si-doped HA prepared by this technique and showed that it significantly had higher resorbability and mineralizing potential compared to the pure HA. Our experimental design including, the individual precipitation and resorption assays enabled us to explain the mechanism behind the improved activity of Si-doped HA in SBF. This was attributed to the formation of new phases, such as β-tricalcium phosphate (β-TCP) and calcium silicate (Ca2SiO4) with higher solubility than HA on the SiO2-contating HA during the sintering stage. This can provide some guidelines for designing new calcium phosphate-based materials for hard tissue engineering applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 15, 15 October 2018, Pages 17612-17622
نویسندگان
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