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Superficial and Inner Examination of a Microwave-Irradiated Dental Acrylic Resin and Its Metal–Polymer Interface

Published online by Cambridge University Press:  27 February 2018

Marian C. Popescu Open the ORCID record for Marian C. Popescu [Opens in a new window] ,
Bogdan I. Bita ,
Vasilica Tucureanu ,
Dan Vasilache ,
Melania A. Banu ,
Andrei M. Avram  and
Raluca A. Giurescu-Dumitrescu
Marian C. Popescu*
Affiliation:
Nano-Scale Structuring and Characterization Laboratory, National Institute for Research and Development in Microtechnologies, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania
Bogdan I. Bita
Affiliation:
Nano-Scale Structuring and Characterization Laboratory, National Institute for Research and Development in Microtechnologies, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania Department of Solid Physics, Faculty of Physics, University of Bucharest, 405 Atomistilor Street, 077125 Magurele, Romania
Vasilica Tucureanu
Affiliation:
Laboratory for Micro- and Nanofluidics, National Institute for Research and Development in Microtechnologies, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania Department of Materials Science, Transilvania University of Brasov, 29 Eroilor Blvd, 500036 Brasov, Romania
Dan Vasilache
Affiliation:
Microwave Circuits and Devices Laboratory, Micromachined Structures, National Institute for Research and Development in Microtechnologies, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania
Melania A. Banu
Affiliation:
Laboratory of Nanobiotechnology, National Institute for Research and Development in Microtechnologies, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania Department of Genetics, Faculty of Biology, University of Bucharest, 91-95 Splaiul Independentei Blvd, 050095 Bucharest, Romania
Andrei M. Avram
Affiliation:
Laboratory for Micro- and Nanofluidics, National Institute for Research and Development in Microtechnologies, 126A Erou Iancu Nicolae Street, 077190 Bucharest, Romania
Raluca A. Giurescu-Dumitrescu*
Affiliation:
Disciplines of Dental Medicine Department, Faculty of Dental Medicine, Titu Maiorescu University, 67A Gheorghe Petrascu Street, 031593 Bucharest, Romania
*
Authors for correspondence: Marian C. Popescu, E-mail: [email protected], [email protected]; Raluca A. Giurescu-Dumitrescu, E-mail: [email protected]
Authors for correspondence: Marian C. Popescu, E-mail: [email protected], [email protected]; Raluca A. Giurescu-Dumitrescu, E-mail: [email protected]
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Abstract

The aim of this study is to conduct an extended surface and cross-section characterization of a denture base acrylic resin subjected to 500, 650, and 750 W microwave irradiation for 2, 3, and 5 min to assess its morphological modifications. A commercial heat-cured powder was polymerized according to the manufacturer’s specifications and distributed into 20 circular samples. A stainless-steel wire was partially embedded in half of the discs, in order to investigate the metal–polymer interface. High-resolution scanning electron microscopy (SEM) imaging, white light interferometry, roughness measurements and Fourier transform infrared spectrometry were employed for morphological and structural evaluation of the irradiated polymer. Superficial adaptation was discovered after 5 min exposure at 500 W, 650 W, and 750 W, revealing significant roughness correction for 750 W. SEM characterization revealed the inner alteration of the resin for the 750 W protocol and a metal–polymer gap developed regardless of the irradiation conditions. The considerable temperature fluctuations that the samples were subject to during the experiments did not essentially change the poly(methyl-methacrylate) bond structure.

Keywords

scanning electron microscopydental acrylic resinmicrowave irradiationroughnessmetal–polymer interface
Type
Biological Science Applications
Information
Microscopy and Microanalysis , Volume 24 , Issue 1 , February 2018 , pp. 49 - 59
Copyright
© Microscopy Society of America 2018 

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