Finishing and polishing effects of multiblade burs on the surface texture of 5 resin composites: microhardness and roughness testing.

Autor:	Ehrmann E; Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, University of Nice Sophia Antipolis, Nice, France.; Pôle Odontologie, CHU Nice Saint Roch, Nice, France.; Micoralis Laboratory, Faculty of Dentistry, University of Nice Sophia Antipolis, Nice, France., Medioni E; Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, University of Nice Sophia Antipolis, Nice, France.; Pôle Odontologie, CHU Nice Saint Roch, Nice, France.; Micoralis Laboratory, Faculty of Dentistry, University of Nice Sophia Antipolis, Nice, France., Brulat-Bouchard N; Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, University of Nice Sophia Antipolis, Nice, France.; Pôle Odontologie, CHU Nice Saint Roch, Nice, France.; MINES ParisTech, PSL Research University, Centre de Mise en Forme des Matériaux (CEMEF), French National Centre for Scientific Research, Sophia Antipolis, France.
Jazyk:	angličtina
Zdroj:	Restorative dentistry & endodontics [Restor Dent Endod] 2018 Nov 26; Vol. 44 (1), pp. e1. Date of Electronic Publication: 2018 Nov 26 (Print Publication: 2019).
DOI:	10.5395/rde.2019.44.e1
Abstrakt:	Objectives: The aim of this in vitro study was to test the effect of 2 finishing-polishing sequences (QB, combining a 12/15-fluted finishing bur and an EVO-Light polisher; QWB, adding a 30-fluted polishing bur after the 12/15-fluted finishing bur used in the QB sequence) on 5 nanotech-based resin composites (Filtek Z500, Ceram X Mono, Ceram X Duo, Tetric Evoceram, and Tetric Evoceram Bulk Fill) by comparing their final surface roughness and hardness values to those of a Mylar strip control group (MS). Materials and Methods: Twelve specimens of each nanocomposite were prepared in Teflon moulds. The surface of each resin composite was finished with QB (5 samples), QWB (5 samples), or MS (2 samples), and then evaluated (60 samples). Roughness was analysed with an optical profilometer, microhardness was tested with a Vickers indenter, and the surfaces were examined by optical and scanning electron microscopy. Data were analysed using the Kruskal-Wallis test ( p < 0.05) followed by the Dunn test. Results: For the hardness and roughness of nanocomposite resin, the QWB sequence was significantly more effective than QB ( p < 0.05). The Filtek Z500 showed significantly harder surfaces regardless of the finishing-polishing sequence ( p < 0.05). Conclusions: QWB yielded the best values of surface roughness and hardness. The hardness and roughness of the 5 nanocomposites presented less significant differences when QWB was used. Competing Interests: Conflict of Interest: No potential conflict of interest relevant to this article was reported.
Databáze:	MEDLINE
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