In vitro investigation of coupling-agent-free dental restorative composite based on nano-porous alumina fillers

Journal of Dentistry
Sanjay B ThoratMarco Salerno

Abstract

The study aims at demonstrating the feasibility of a novel type of coupling-agent-free resin composite based on nano-porous fillers. The fillers were obtained by ball-milling anodic alumina membranes. Composites were prepared with standard resin at maximum loading of 50% by weight. The resin matrix penetration into the pores was verified visually by scanning electron microscopy and mechanically by atomic force microscopy in force modulation mode. The dynamic flexural modulus at 1Hz was measured by dynamic mechanical analysis. Silver nanoparticles were also synthesized in the pores and their release was investigated with inductive coupled plasma optical emission spectrometry. A storage modulus of 5GPa was measured, similar to the ∼6GPa ones of two coupling-agent-based dental restorative composites used for comparison, which is a promising starting point, additionally showing better one-year equivalent ageing as compared to both commercial materials. Loading the pores with silver nanoparticles was demonstrated as well as their subsequent release in a model system. The alumina micro-particles with interconnected nano-pores allow mechanical interlocking between fillers and matrix without the need for chemical bonding. This material...Continue Reading

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Citations

Dec 10, 2016·Microscopy Research and Technique·Patrícia Petromilli Nordi Sasso GarciaAna Carolina Botta
Sep 13, 2017·Tissue Engineering and Regenerative Medicine·Shariq NajeebJukka Pekka Matinlinna
Apr 21, 2021·Stomatologii︠a︡·A V Blinova, V A Rumyantsev
Jun 3, 2021·Materials·Veaceslav ȘarametMihaela Pantea
Jan 11, 2016·ACS Biomaterials Science & Engineering·Eric HabibX X Zhu

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