ساخت و مشخصه‌یابی نانوبیوسرامیک نوین ویلمایت برای ترمیم نواقص استخوانی

نویسندگان

گروه مهندسی مواد، دانشکده فنی مهندسی، دانشگاه شهرکرد، شهرکرد

چکیده

تاثیر مثبت یون‌ها‌ی سیلسیم و روی در رشد و دگرگشت (متابولیسم) استخوان به اثبات رسیده است. هدف از این پژوهش ساخت و مشخصه‌یابی نانوبیوسرامیک ویلمایت (Zn2SiO4)، حاوی روی و سیلسیم، برای ترمیم نواقص استخوانی بود. سرامیک ویلمایت به‌کمک روش واکنش حالت جامد تهیه شد. ترکیب شیمیایی و ساختار بلوری این بیوسرامیک مورد ارزیابی قرار گرفت. پتانسیل زتا در محلول سرم فیزیولوژیک تعیین گردید و استحکام فشاری و مدول یانگ نمونه‌ها‌ نیز اندازه‌گیری شد. هم‌چنین توانایی تشکیل هیدروکسی آپاتیت در محلول شبیه‌سازی شده بدن مورد بررسی قرار گرفت و آزمون سنجش سمیت نانوذرات در تماس با سلول‌ها‌ی بنیادی مغز استخوان انجام گرفت. یافته‌ها نشان داد که نانوبیوسرامیک بلوری ویلمایت با ترکیب مورد نظر و مقدار پتانسیل زتای منفی ساخته شد. نتایج نشان داد که توانایی تشکیل هیدروکسی آپاتیت بر سطح ویلمایت در محلول شبیه سازی شده بدن چندان قابل توجه نبود. آزمون MTT عدم سمیت و هم‌چنین فعالیت زیستی و تکثیر سلول‌های بنیادی مغز استخوان انسان در تماس با غلظت مشخصی از نانوذرات ویلمایت را تایید نمود. تمامی این یافته‌ها نشان داد که نانوبیوسرامیک نوین ویلمایت با سازگاری زیستی (عدم سمیت) بسیار مناسب، می‌تواند به عنوان یک بیوماده مناسب برای ترمیم نواقص استخوانی پیشنهاد شود.

کلیدواژه‌ها


عنوان مقاله [English]

Fabrication and Characterization of Novel Willemite Nanobioceramic for Bone Defect Repair

نویسندگان [English]

  • S. Mohammadi
  • A. Doostmohammadi
  • M.R. Saeri
چکیده [English]

The positive effect of Si and Zn ions on bone formation and metabolism has already been confirmed. The aim of this study was preparation and characterization of Willemite (Zn2SiO4) for the repair of bone defects. Willemite was prepared through solid state reaction. Phase analysis and chemical compositions were investigated. The zeta potential of the nanoparticles was determined in physiological saline, and compressive strength and Young's modulus of the samples were measured. The ability of hydroxyapatite formation was investigated in simulated body fluid (SBF) and cytotoxicity of the particles was evaluated in contact with human bone marrow stem cells. The results of this study showed that Willemite nanobioceramic is obtained with the expected chemical composition and negative zeta potential. The results also showed that the hydroxyapatite forming ability in SBF was not strong. MTT assay confirmed the cell proliferation and availability in contact with a specific concentration of Willemite nanoparticles. All these findings indicate that Willemite nanobioceramic with proper biocompatibility can be suggested as a novel biomaterial for the repair of bone defects.

کلیدواژه‌ها [English]

  • Nanbioceramic
  • Willemite
  • Cell toxicity
  • Bone marrow stem cells
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