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British Journal of Medicine and Medical Research, ISSN: 2231-0614,Vol.: 20, Issue.: 8


The Influence of Different Polishing Systems on the Surface Roughness and Microhardness of Nanocomposites after Exposure to Acid Drink


Bruna C. O. Lima1, Carlize Vincenzi1, Juliana Royer Heidmann1, Glaucia M. B. Ambrosano2, Virgínia Bosquiroli3, Márcio J. Mendonça3 and Veridiana Camilotti3*

1School of Dentistry, State University of Western Parana (UNIOESTE), Cascavel, Parana, Brazil.

2Departament of Social Odontology, School of Dentistry, State University of Campinas – FOP/Unicamp, Piracicaba, São Paulo, Brazil.

3Department of Restorative Dentistry, School of Dentistry, State University of Western Parana (UNIOESTE), Cascavel, Parana, Brazil.

Article Information
(1) Ibrahim El-Sayed M. El-Hakim, Ain Shams University, Egypt and Riyadh College of Dentistry and Pharmacy, Riyadh, Saudi Arabia.
(2) Manuele Mancini, Department of Restorative Dentistry and Endodontics, University of Rome “Tor Vergata,” Rome, Italy.
(3) Masahiro Hasegawa, Department of Orthopaedic Surgery, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu City, Mie, 514-8507, Japan.
(1) Mehmet Ulusoy, Gazi University, Turkey.
(2) Ugur Erdemir, University of Istanbul, Istanbul, Turkey.
(3) Ibrahim Mohamed Hamouda, Mansoura University, Egypt.
(4) Sam’an Malik Masudi, Lincoln University College, Malaysia.
Complete Peer review History: http://www.sciencedomain.org/review-history/18358


Aims: This in vitro study evaluated the surface roughness and microhardness of nanocomposites, after storage in acid solution for three months, with different techniques polishing systems.

Study Design: In vitro study.

Place and Duration of Study: Department of Restorative Dentistry, School of Dentistry, State University of Western Parana (UNIOESTE), Cascavel, Parana, Brazil, between June, and October, 2014.

Methodology: A total of 280 specimens (4-mm in diameter, 2 mm thick) were fabricated for both tests (n=140 each test) in a plexiglass mold covered with a Mylar strip. After polymerization, specimens were divided into seven groups (n=20) according to the technique polishing systems: G1 – control group (no polishing treatment); G2 - Soft-Lex Discs; G3 - Diamont Master Discs; G4 - Po Go; G5 – Flexi discs; G6 – Enhance; G7 – Felt disks associated with diamond paste. All polishing systems were applied according to the manufacturers’ instructions. The specimens were randomly divided into two groups according to the storage solution: a) distilled water and b) Coca-Cola classic, for a period of three months at 37°C. The surface roughness values were determined using a roughness test (initially and after three months). The microhardness measurements were performed using a digital microhardness tester (initially and after three months). The mean Ra and microhardness values were submitted to the LS means analysis and Tukey-Kramer test of 5%.

Results: There were no statistically significant differences between polishing systems in the roughness and microhardness of nanocomposites (p<0,05). The solution of Coca-Cola led to higher values of reduced surface roughness and microhardness values after 3 months of storage.

Conclusion: All polishing systems may be successfully used for polishing nanocomposites.

Keywords :

Composite resin; dental polishing; surface roughness; microhardness.

Full Article - PDF    Page 1-8

DOI : 10.9734/BJMMR/2017/30988

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