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Open AccessArticle

Antibacterial Drug-Release Polydimethylsiloxane Coating for 3D-Printing Dental Polymer: Surface Alterations and Antimicrobial Effects

1
Institute for Translational Research in Dentistry, Kyungpook National University, Daegu 41940, Korea
2
Department of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Korea
3
Department of Pharmacology, School of Dentistry, Kyungpook National University, Daegu 41940, Korea
4
Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu 41940, Korea
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Pharmaceuticals 2020, 13(10), 304; https://doi.org/10.3390/ph13100304
Received: 4 September 2020 / Revised: 30 September 2020 / Accepted: 10 October 2020 / Published: 12 October 2020
(This article belongs to the Special Issue Novel Antibacterial Agents)
Polymers are the most commonly used material for three-dimensional (3D) printing in dentistry; however, the high porosity and water absorptiveness of the material adversely influence biofilm formation on the surface of the 3D-printed dental prostheses. This study evaluated the effects of a newly developed chlorhexidine (CHX)-loaded polydimethylsiloxane (PDMS)-based coating material on the surface microstructure, surface wettability and antibacterial activity of 3D-printing dental polymer. First, mesoporous silica nanoparticles (MSN) were used to encapsulate CHX, and the combination was added to PDMS to synthesize the antibacterial agent-releasing coating substance. Then, a thin coating film was formed on the 3D-printing polymer specimens using oxygen plasma and thermal treatment. The results show that using the coating substance significantly reduced the surface irregularity and increased the hydrophobicity of the specimens. Remarkably, the culture media containing coated specimens had a significantly lower number of bacterial colony formation units than the noncoated specimens, thereby indicating the effective antibacterial activity of the coating. View Full-Text
Keywords: 3D-printing; dental polymer; antibacterial agent; coating; mesoporous silica nanoparticles; polydimethylsiloxane 3D-printing; dental polymer; antibacterial agent; coating; mesoporous silica nanoparticles; polydimethylsiloxane
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MDPI and ACS Style

Mai, H.-N.; Hyun, D.C.; Park, J.H.; Kim, D.-Y.; Lee, S.M.; Lee, D.-H. Antibacterial Drug-Release Polydimethylsiloxane Coating for 3D-Printing Dental Polymer: Surface Alterations and Antimicrobial Effects. Pharmaceuticals 2020, 13, 304.

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