کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1420380 986360 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of novel strontium containing bioactive glass based calcium phosphate cement
ترجمه فارسی عنوان
توسعه استرنسیوم جدید حاوی سیمان کلسیم فسفات بر اساس شیشه زیست فعال
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
چکیده انگلیسی


• A novel method to develop a bone substitute is shown.
• Bioactive glasses are used as precursor to form calcium phosphate cements.
• Strontium addition in the glass has positive effects on cement's properties.

ObjectiveThe aim of this study was to investigate the effect on properties of increasing strontium substitution for calcium in bioactive glasses used as precursors for novel calcium phosphate cements.MethodsGlasses were produced by progressively substituting strontium for calcium. Cements were prepared by mixing the glass powder with Ca(H2PO4)2 powder with a 2.5% solution of Na2HPO4. Setting times and compressive strength were measured after 1 h, 1 day, 7 days and 28 days immersion in Tris buffer solution. X-ray diffraction (XRD), Fourier transform infrared spectroscopy and radiopacity were measured and crystal morphology was assessed using scanning electron microscopy.ResultsA correlation between the phases formed, morphology of the crystallites, setting time and compressive strength were analyzed. Setting time increased proportionally with strontium substitution in the glass up to 25%, whereas for higher substitutions it decreased. Compressive strength showed a maximum value of 12.5 MPa and was strongly influenced by the interlocking of the crystals and their morphology. XRD showed that the presence of strontium influenced the crystal phases formed. Octacalcium phosphate (Ca8H2(PO4)6·5H2O, OCP) was the main phase present after 1 h and 1 day whereas after 28 days OCP was completely transformed to strontium-containing hydroxyapatite (SrxCa(10−x)(PO4)6(OH)2, SrHA). Radiopacity increased proportionally to strontium substitution in the glass.SignificanceA novel method to develop a bone substitute forming in vitro SrHA as a final product by using a bioactive glass as a precursor was shown. These novel injectable bioactive glass cements are promising materials for dental and orthopedic applications. Further in vivo characterizations are being conducted.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dental Materials - Volume 32, Issue 6, June 2016, Pages 703–712
نویسندگان
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