In this work we present some results about the low temperature, plasma-assisted growth of silicon–oxygen amorphous thin film alloys (a-SiOx) on different types of dental materials used for the fabrication of dental prostheses. The a-SiOx films were grown at substrate temperatures lower than 70 °C by a PECVD deposition system using silane (SiH4) and nitrous oxide (N2O) as precursor gases. The chemical bonding structure of the films was investigated by Fourier transform infra-red spectroscopy (FTIR), while the morphological characteristics of the dental materials were analyzed before and after the coating deposition by means of high-resolution mechanical profilometry. The surface energy of dental materials was estimated before and after the coating process by contact angle measurements, revealing that the coating produced a considerable change of surface energy in all the tested samples, evidenced by a contact angle reduction from more than 90° to less than 10°. Some tests were also performed to estimate the effect of the coating on the bacterial adhesion properties, revealing that the a-SiOx coatings show some effectiveness in reducing the bacterial adhesion on the dental materials surface. © 2007 Elsevier B.V. All rights reserved.

Low temperature growth of thin film coatings for the surface of modification of dental prostheses

MUSSANO, Federico Davide Costanti;CERUTI, Paola;CAROSSA, Stefano
2008-01-01

Abstract

In this work we present some results about the low temperature, plasma-assisted growth of silicon–oxygen amorphous thin film alloys (a-SiOx) on different types of dental materials used for the fabrication of dental prostheses. The a-SiOx films were grown at substrate temperatures lower than 70 °C by a PECVD deposition system using silane (SiH4) and nitrous oxide (N2O) as precursor gases. The chemical bonding structure of the films was investigated by Fourier transform infra-red spectroscopy (FTIR), while the morphological characteristics of the dental materials were analyzed before and after the coating deposition by means of high-resolution mechanical profilometry. The surface energy of dental materials was estimated before and after the coating process by contact angle measurements, revealing that the coating produced a considerable change of surface energy in all the tested samples, evidenced by a contact angle reduction from more than 90° to less than 10°. Some tests were also performed to estimate the effect of the coating on the bacterial adhesion properties, revealing that the a-SiOx coatings show some effectiveness in reducing the bacterial adhesion on the dental materials surface. © 2007 Elsevier B.V. All rights reserved.
2008
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2477
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http://www.science-direct.com/science?_ob=MImg&_imagekey=B6TVV-4PW5XCC-1-J&_cdi=5544&_user=525216&_orig=browse&_coverDate=02%2F25%2F2008&_sk=997979988&view=c&wchp=dGLbVzb-zSkzS&md5=7aac0f17023701e81bba7123ad2e1e64&ie=/sdarticle.pdf
PECVD; Silicon oxide; Thin films; Bacterial adhesion; Dental prostheses
MANDRACCI P; MUSSANO F; RICCIARDI C; CERUTI P; PIRRI F; CAROSSA S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/27519
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