پديد آورنده :
گل نيا، زهرا
عنوان :
تاثير افزودن نانو ذرات سراميكي دي اكسيد تيتانيم، شيشه زيستي، هيدروكسي آپاتيت و فلوئور آپاتيت بر خواص زيستي و مكانيكي سيمان هاي گلاس آينومر
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
دوازده،103ص.: مصور،جدول،نمودار﴿رنگي﴾
يادداشت :
ص.ع.به فارسي و انگليسي
توصيفگر ها :
نانو ذرات زيستي , استحكام فشاري , زيست فعالي , رهايش فلورايد
تاريخ نمايه سازي :
11/9/92
استاد داور :
رحمت اله عمادي، محمدرضا سائري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
The Effect of added TiO2 Bioactive glass Hydroxyapatite and Fluoroapatite ceramic nanoparticles on the mechanical and bioactive properties of glass ionomer cements Z Golniya Email address z golnia@ma iut ac ir Department of materials engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor s Name Ahmad Monshi Professor a monshi@cc iut ac ir AbstractGlass ionomer cements are of important restorative materials used in dentistry Improvement of biologicaland mechanical properties of these materials has consistently of interest to researchers The aim of this studywas to improve the strength bioactivity and Fluoride release of glass ionomer cement by adding the ceramicnanoparticles to it For this purpose the ceramic component of glass ionomer cement was prepared with sol gel and melting methods Hydroxyapatite Fluoroapatyte and bio glass also were synthesized by sol gelmethod Then the synthesized ceramic nanoparticles and purchased Titania nanoparticles with the amountsof 2 5 5 and 7 5 wt were added to glass ionomer powders Poly acrylic acid was used as binder Phase morphological and microstructural investigations were performed by X ray diffraction XRD X rayflorescence XRF scanning electeron microscopy SEM and field emission scanning electron microscopy FESEM The mechanical properties of produced samples were evaluated by compression test In order toassess the bioactivity of nanocomposites the samples were immersed in simulating body flouid SBF for 14and 28 days SEM was used to confirm the formation of apatite layer on immersed specimens Finally thefluoride release tests were carried out in artificial saliva fluid so that the specimens were immersed in thefluid for 1 3 7 and 14 days and the amount of released fluoride was measured by potentiometric method The results demonstrated that the glass ionomer bio glass Hydroxyapatite and Fluoroapatyte particlessynthesized by sol gel method have nano size dimensions Atomic absorption and SEM tests confirmed theformation of apatite layer on all composite specimens According to compressive tests results the maximumstrength was obtained by adding 2 5 wt of ceramic nanoparticles to glass matrix By adding this amount ofFluoroapatite Hydroxiapatite Bio glass and Titania to the glass ionomer matrix the compressive strengthwas improved by 33 44 19 and 68 respectively These results showed that Titania nanoparticles hada greater effect on strength improvement The nanocomposite sample containing Fluoroapatite nanoparticlesexhibited the highest bioactivity among the produced nanocomposites The results of Fluoride release testsindicated that Fluoroapatite nanoparticles increase the rate of Fluoride release Keywords glass ionomer bio glass biological nanoparticles compressive strength bioactivity fluoriderelease
استاد داور :
رحمت اله عمادي، محمدرضا سائري
