کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7888643 | 1509795 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of Y-TZP blank manufacturing control and addition of TiO2 nanotubes on structural reliability of dental materials
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کلمات کلیدی
σ0Biomedical applications (E)characteristic strengthY-TZPFE-SEMEDXEnergy Dispersive X-ray Spectroscopy - اشعه ماوراء بنفش اشعه ایکسstandard deviation - انحراف معیارISO - ایزوTem - این استanalysis of variance - تحلیل واریانسANOVA - تحلیل واریانس Analysis of varianceInternational Organization for Standardization - سازمان بین المللی استاندارد سازیSEM - مدل معادلات ساختاری / میکروسکوپ الکترونی روبشیWeibull modulus - مدول Weibullscanning electron microscope - میکروسکوپ الکترونی اسکنTransmission electron microscopy - میکروسکوپ الکترونی عبوریField emission scanning electron microscopy - میکروسکوپ الکترونی منتشر کننده انتشار میدانX-ray diffraction - پراش اشعه ایکسXRD - پراش اشعه ایکسPores - پری هاPMMA - پلی (متیل متاکریلات) polymethyl methacrylate - پلی متیل متاکریلات
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Titanium dioxide (TiO2) nanotubes have been applied to enhance the mechanical and biological properties of dental materials. Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) have been increasingly used in dentistry as a substructure for crowns and fixed partial prostheses. Aside from its optimal clinical results, Y-TZP is prone to failures due to microstructure-related defects introduced in the manufacturing process that may lower its structural and clinical reliability. The purpose of this study was to evaluate the role of the manufacturing process of blanks as well as their original composition modification by addition of TiO2 nanotubes (0%, 1%, 2% and 5% in volume) while controlling all manufacturing steps. Materials were subjected to a biaxial flexural strength test, a fractographic qualitative analysis by scanning electron microscopy (SEM), a microstructure evaluation in field emission-SEM and X-ray diffraction. Values of flexural strength were subjected to ANOVA, Tukey (α = 0.05) and Weibull statistics. Grain size values were subjected to Kruskal-Wallis and Dunn tests (α = 0.05). of the results include that for experimental Y-TZP added 2% vol TiO2 nanotube ceramics presented flexural strength values at 577 MPa and Weibull modulus (m) at 8.1. The addition of TiO2 nanotubes in different blends influenced experimental Y-TZP properties, leading to lower flexural strength, although they presented higher m than the commercial Y-TZP. Nanotubes also led to bigger grain sizes, more pores and a slight increase in the monoclinic phase, influencing the microstructure of Y-TZP. Y-TZP blank manufacturing control as well as addition of TiO2 nanotubes led to higher m values and, hence, greater structural reliability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 3, 15 February 2018, Pages 2959-2967
Journal: Ceramics International - Volume 44, Issue 3, 15 February 2018, Pages 2959-2967
نویسندگان
Ana Paula Rodrigues Magalhães, Carlos Alberto Fortulan, Paulo Noronha Lisboa-Filho, Carla Müller Ramos-Tonello, Orisson Ponce Gomes, Paulo Francisco Cesar, Karen Akemi Fukushima, Rafael Francisco Lia Mondelli, Ana Flávia Sanches Borges,