کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7208010 | 1469085 | 2016 | 41 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Contact fatigue of human enamel: Experiments, mechanisms and modeling
ترجمه فارسی عنوان
تماس با خستگی مینای انسانی: آزمایشات، مکانیزم ها و مدل سازی
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کلمات کلیدی
تاج سرامیک، تماس، ترک، مینا خستگی، شکستگی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
چکیده انگلیسی
Cyclic contact between natural tooth structure and engineered ceramics is increasingly common. Fatigue of the enamel due to cyclic contact is rarely considered. The objectives of this investigation were to evaluate the fatigue behavior of human enamel by cyclic contact, and to assess the extent of damage over clinically relevant conditions. Cyclic contact experiments were conducted using the crowns of caries-free molars obtained from young donors. The cuspal locations were polished flat and subjected to cyclic contact with a spherical indenter of alumina at 2Â Hz. The progression of damage was monitored through the evolution in contact displacement, changes in the contact hysteresis and characteristics of the fracture pattern. The contact fatigue life diagram exhibited a decrease in cycles to failure with increasing cyclic load magnitude. Two distinct trends were identified, which corresponded to the development and propagation of a combination of cylindrical and radial cracks. Under contact loads of less than 400Â N, enamel rod decussation resisted the growth of subsurface cracks. However, at greater loads the damage progressed rapidly and accelerated fatigue failure. Overall, cyclic contact between ceramic appliances and natural tooth structure causes fatigue of the enamel. The extent of damage is dependent on the magnitude of cyclic stress and the ability of the decussation to arrest the fatigue damage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 60, July 2016, Pages 438-450
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 60, July 2016, Pages 438-450
نویسندگان
S.S. Gao, B.B. An, M. Yahyazadehfar, D. Zhang, D.D. Arola,