Polymer coatings based on sulfonated-poly-ether-ether-ketone films for implant dentistry applications

  • R. S. BrumEmail author
  • P. R. Monich
  • M. C. Fredel
  • G. Contri
  • S. D. A. S. Ramoa
  • R. S. Magini
  • C. A. M. Benfatti
Clinical Applications of Biomaterials Original Research
Part of the following topical collections:
  1. Clinical Applications of Biomaterials


Poly-ether-ether-ketone (PEEK) is one of the most important biocompatible polymers and its sulfonation has been studied for biomedical applications. The aim of the present study is to produce, to characterize and to assess bioactivity of PEEK coatings with sulfonated PEEK (SPEEK) films. Biomedical grade PEEK (Invibio®, Batch: D0602, grade: NI1) was functionalized using sulfuric acid 98%. SPEEK was dissolved into DMSO or into DMF, both at 10% mass/volume. PEEK bars (N = 18) and cylinders (N = 27) were manufactured by compression molding and heating. SPEEK/DMSO and SPEEK/DMF were drop casted at PEEK bars and dip coated at PEEK cylinders (PEEK + SPEEK/DMSO and PEEK + SPEEK/DMF). Characterization was performed through Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and contact angle measurements. Bioactivity was assessed by immersion of samples at SBF for 1, 7 and 21 days, followed by SEM, energy-dispersive analysis (EDX) and FTIR analysis. Statistical analysis was carried out by one-way analysis of variance (ANOVA) (p = 0.05). Characteristic bands of PEEK and SPEEK, were identified through FTIR spectrum analysis, while semicrystallinity was confirmed by XRD. PEEK + SPEEK/DMF showed more evident physicochemical modifications. PEEK + SPEEK/DMSO provided a more regular and hydrophobic surface, observed through SEM and contact angle measurements. SEM/EDX showed that precipitates of calcium were formed at PEEK + SPEEK/DMSO and PEEK + SPEEK/DMF at all experimental times, but materials were not considered bioactive. Interesting surface properties were achieved with SPEEK coatings but the production of SPEEK films at PEEK surface has to be further improved and biologically tested.

Schematic diagram showing the methodology applied in this study to prepare PEEK and SPEEK samples, as well as the promising application of the material



This project was supported by a grant from the ITI Foundation, Switzerland. Authors also express their gratitude to CAPES and FAPEU at Brazil. Patricia Rabelo Monich contribution to this work was done before she integrated the NEW-MINE project.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • R. S. Brum
    • 1
    Email author
  • P. R. Monich
    • 2
  • M. C. Fredel
    • 2
  • G. Contri
    • 2
  • S. D. A. S. Ramoa
    • 2
  • R. S. Magini
    • 1
  • C. A. M. Benfatti
    • 1
  1. 1.Center for Research on Dental Implants (CEPID), School of Dentistry (ODT)Federal University of Santa Catarina (UFSC)Florianopolis/SCBrazil
  2. 2.Department of Mechanical Engineering (EMC)Federal University of Santa Catarina (UFSC)Florianopolis/SCBrazil

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