Objectives: Innovative, nanotechnologies-featuring dental materials for CAD/CAM applica-tions are becoming available. However, the interaction with the oral environment poses critical challenges to their longevity. The present study evaluated specific physical -che-mical properties and antimicrobial potential of a CAD/CAM graphene-doped resin before and after accelerated aging protocols.Methods: Graphene nanofibers (GNF)-doped (< 50 ppm) PMMA (GPMMA) and control PMMA CAD/CAM discs were used. Specimens underwent aging procedures of their bulk (thermo-and load-cycling) and surface (24 h-immersion in absolute ethanol), then they were tested for flexural strength, ultimate tensile strength, sorption/solubility, and methyl-methacry-late elution. Surface characterization included x-ray diffraction, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, surface roughness, microhardness, and scanning electron microscopy (SEM). Adherence of Streptococcus mutans and Candida albi- cans, and biofilm formation (continuous-flow bioreactor) by the same strains and an arti-ficial oral microcosm were investigated.

Physical-chemical and microbiological performances of graphene-doped PMMA for CAD/CAM applications before and after accelerated aging protocols / A.C. Ionescu, E. Brambilla, P.M. Pires, A. López-Castellano, A.M. Alambiaga-Caravaca, C. Lenardi, S. Sauro. - In: DENTAL MATERIALS. - ISSN 0109-5641. - 38:9(2022), pp. 1470-1481. [10.1016/j.dental.2022.06.032]

Physical-chemical and microbiological performances of graphene-doped PMMA for CAD/CAM applications before and after accelerated aging protocols

A.C. Ionescu
Primo
;
E. Brambilla
Secondo
;
C. Lenardi
Penultimo
;
2022

Abstract

Objectives: Innovative, nanotechnologies-featuring dental materials for CAD/CAM applica-tions are becoming available. However, the interaction with the oral environment poses critical challenges to their longevity. The present study evaluated specific physical -che-mical properties and antimicrobial potential of a CAD/CAM graphene-doped resin before and after accelerated aging protocols.Methods: Graphene nanofibers (GNF)-doped (< 50 ppm) PMMA (GPMMA) and control PMMA CAD/CAM discs were used. Specimens underwent aging procedures of their bulk (thermo-and load-cycling) and surface (24 h-immersion in absolute ethanol), then they were tested for flexural strength, ultimate tensile strength, sorption/solubility, and methyl-methacry-late elution. Surface characterization included x-ray diffraction, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, surface roughness, microhardness, and scanning electron microscopy (SEM). Adherence of Streptococcus mutans and Candida albi- cans, and biofilm formation (continuous-flow bioreactor) by the same strains and an arti-ficial oral microcosm were investigated.
Biofilm(s); Bioreactor(s); CAD-CAM; Candida albicans; Composite materials; Graphene; Nanotechnology; PMMA; Streptococcus mutans; Surface chemistry/properties; Computer-Aided Design; Dental Materials; Materials Testing; Surface Properties; Graphite; Polymethyl Methacrylate
Settore MED/28 - Malattie Odontostomatologiche
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/946148
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