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Atomic force microscopy nanoindentation of a dental restorative midifill composite
چکیده:   (3194 مشاهده)
Objectives

 We investigated the elastic properties of one dental restoration resin composite of common use, Venus Diamond, at submicrometer spatial resolution.

Methods

 We performed both nanoindentation experiments with atomic force microscopy, and microindentation experiments with a traditional indenter setup. We also used scanning electron microscopy and energy dispersive X-rays spectroscopy to better understand the correlation between properties and microscopic structure and composition.

Results

 With atomic force microscopy we obtained quantitative evaluation of the elastic modulus (10.8AWT IMAGE±AWT IMAGE4.3AWT IMAGEGPa), in agreement with the microindentation value (reduced modulus of 12.7AWT IMAGE±AWT IMAGE2.0AWT IMAGEGPa), and by microindentation we also obtained an hardness value (460AWT IMAGE±AWT IMAGE109AWT IMAGEMPa) compatible in turn with the nominal value provided by the material manufacturer (HAWT IMAGEAWT IMAGE578AWT IMAGEMPa). The nanoindentation also revealed that no relevant difference in elasticity appears between the 5 and 10AWT IMAGEμm diameter filler particles and the surrounding areas, showing an excellent uniformity of the composite. In support of this finding, compositional uniformity of the material was also observed by X-rays spectroscopy. We conclude that the composite contains prepolymerized particles.

Significance

 We demonstrate that, in addition to reliable quantitative analysis, the high resolution and two-dimensional mapping capability of atomic force microscopy allows for advanced insights into the microstructure of the composite that are not accessible via traditional microindentation.


  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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• Salerno •, • Patra •, • Diaspro •. Atomic force microscopy nanoindentation of a dental restorative midifill composite. 3 2012;
URL: http://idai.ir/article-1-276-fa.html

Atomic force microscopy nanoindentation of a dental restorative midifill composite. 1. 1390;

URL: http://idai.ir/article-1-276-fa.html



بازنشر اطلاعات
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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