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Biofilm formation on polyetheretherketone and titanium surfaces

Journal article
Authors Sargon Barkarmo
D. Longhorn
K. Leer
Carina B. Johansson
Victoria Franke Stenport
Sebastian Franco Tabares
S. A. Kuehne
R. Sammons
Published in Clinical and Experimental Dental Research
Volume 5
Issue 4
Pages 427-437
ISSN 2057-4347
Publication year 2019
Published at Institute of Odontology, Section 2
Pages 427-437
Language en
Keywords biocompatible materials, biofilms, dental materials, polyetheretherketone
Subject categories Dentistry


Objective: Polyetheretherketone (PEEK) is a polymer used in devices in orthopedic and dental rehabilitation. The aim of this in vitro study was to compare biofilm formation by a range of important oral bacterial species on PEEK, blasted PEEK, commercially pure titanium (cp-Ti), and titanium-6 aluminium-4 vanadium (Ti6Al4V). Material and methods: Coin-shaped samples were manufactured, and the surfaces were characterized using optical interferometry, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and contact angle measurements. Bacterial species of Streptococcus sanguinis, Streptococcus oralis, Enterococcus faecalis, and Streptococcus gordonii were cultured on the four material surfaces for varying amounts of time. Biofilms were quantified following staining with crystal violet. Results: Roughness and contact angle results showed blasted PEEK > PEEK > cp-Ti = Ti6Al4V. There was increased biofilm formation on blasted PEEK by S. sanguinis, S. oralis, and S. gordonii, whereas the bacterial adhesion was similar on PEEK, cp-Ti, and Ti6Al4V. The bacterial growth of E. faecalis was significantly higher on cp-Ti compared with the other three groups. Conclusion: The results, taking into consideration the biofilm formation, suggest that PEEK should perform as well as cp-Ti or TiAl6V4 when used as a dental restorative material. © 2019 The Authors. Clinical and Experimental Dental Research published by John Wiley & Sons Ltd.

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