Polymer coatings based on sulfonated-poly-ether-ether-ketone films for implant dentistry applications
- 222 Downloads
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.
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.
- 20.Suárez-López Del, Amo F, Yu SH, Wang HL. Non-Surgical Therapy for Peri-Implant Diseases: a Systematic Review. J Oral Maxillofac Res. 2016;7:e13Google Scholar
- 28.Kakinuma H, Ishii K, Ishihama H, Honda M, Toyama Y, Matsumoto M, et al. Antibacterial polyetheretherketone implants immobilized with silver ions based on chelate-bonding ability of inositol phosphate: processing, material characterization, cytotoxicity, and antibacterial properties. J Biomed Mater Res A. 2015;103:57–64.CrossRefGoogle Scholar
- 31.Zaidi SMJ. Polymer sulfonation – a versatile route to prepare proton-conducting membrane material for advanced technologies. Arab J Sci Eng. 2003;28:183–94.Google Scholar
- 37.Nedeljkovic I, De Munck J, Ungureanu AA, Slomka V, Bartic C, Vananroye A, et al. Biofilm-induced changes to the composite surface. Journal of Dentistry, 2017.Google Scholar
- 40.Sanz-Sánchez I, Sanz-Martín I, Carrillo de Albornoz A, Figuero E, Sanz M. Biological effect of the abutment material on the stability of peri-implant marginal bone levels: A systematic review and meta-analysis. Clin Oral Implants Res 2018; 1-21Google Scholar
- 41.Zhang J, Wei W, Yang L, Pan Y, Wang X, Wang T, et al. Stimulation of cell responses and bone ingrowth intomacro-microporous implants of nano-bioglass/polyetheretherketonecomposite and enhanced antibacterial activity by release of hinokitiol. Colloids Surf B: Biointerfaces. 2018;164:347–57.CrossRefGoogle Scholar