کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10950 710 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In vitro lifetime of dental ceramics under cyclic loading in water
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
In vitro lifetime of dental ceramics under cyclic loading in water
چکیده انگلیسی

All-ceramic dental restorations exhibit enhanced esthetics and biocompatibility as compared to traditional metal-based prosthesis. However, long-term fatigue and subcritical crack growth in the presence of water and cyclic loading can decrease the strength of ceramic components over time. We investigated the cyclic fatigue in water of three dental materials currently used as frameworks in all-ceramic restorations: a 3 mol%-yttria partially stabilized zirconia (3Y-TZP, Cercon, Degudent GmbH), a Al2O3–ZrO2–Glass composite (Inceram-Zirconia, Vita Zahnfabrik GmbH) and a Li2O·2SiO2 glass ceramic (Empress 2, Ivoclar Vivadent AG). Fatigue and fast fracture tests were performed to determine the Weibull distribution of lifetime and initial mechanical strength for each framework component. In spite of its noticeable susceptibility to fatigue in water, the 3Y-TZP material was found to be particularly suitable for the preparation of posterior all-ceramic bridges due to its high initial mechanical strength. Guidelines are provided for the selection of materials and the design of all-ceramic posterior bridges exhibiting lifetime longer than 20 years under severe wet and cyclic loading conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomaterials - Volume 28, Issue 17, June 2007, Pages 2695–2705
نویسندگان
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