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Sensitivity analysis of bi-layered ceramic dental restorations
چکیده:   (3123 مشاهده)
Objectives

 The reliability and longevity of ceramic prostheses have become a major concern. The existing studies have focused on some critical issues from clinical perspectives, but more researches are needed to address fundamental sciences and fabrication issues to ensure the longevity and durability of ceramic prostheses. The aim of this paper was to explore how “sensitive” the thermal and mechanical responses, in terms of changes in temperature and thermal residual stress of the bi-layered ceramic systems and crown models will be with respect to the perturbation of the design variables chosen (e.g. layer thickness and heat transfer coefficient) in a quantitative way.

Methods

 In this study, three bi-layered ceramic models with different geometries are considered: (i) a simple bi-layered plate, (ii) a simple bi-layer triangle, and (iii) an axisymmetric bi-layered crown.

Results

 The layer thickness and convective heat transfer coefficient (or cooling rate) seem to be more sensitive for the porcelain fused on zirconia substrate models.

Significance

 The resultant sensitivities indicate a critical importance of the heat transfer coefficient and thickness ratio of core to veneer on the temperature distributions and residual stresses in each model. The findings provide a quantitative basis for assessing the effects of fabrication uncertainties and optimizing the design of ceramic prostheses.


  Source: Dental Materials

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نوع مطالعه: پژوهشي | موضوع مقاله: ترمیمی
دریافت: 1390/11/20 | پذیرش: 1394/9/25 | انتشار: 1394/9/25
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Zhang •, • Zhou •, • Li •, • Li •, • V. Swain •. Sensitivity analysis of bi-layered ceramic dental restorations. 3 2012;
URL: http://idai.ir/article-1-281-fa.html

Sensitivity analysis of bi-layered ceramic dental restorations. 1. 1390;

URL: http://idai.ir/article-1-281-fa.html



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Creative Commons License این مقاله تحت شرایط Creative Commons Attribution-NonCommercial 4.0 International License قابل بازنشر است.
جلد 0 - ترمیمی برگشت به فهرست نسخه ها
جامعه اسلامی دندانپزشکان Islamic Dental Association of IRAN

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