Superior biofunctionality of dental implant fixtures uniformly coated with durable bioglass films by magnetron sputtering.
Bioactive glasses are currently considered the suitable candidates to stir the quest for a new generation of osseous implants with superior biological/functional performance. In congruence with this vision, this contribution aims to introduce a reliable technological recipe for coating fairly complex 3D-shaped implants (e.g. dental screws) with uniform and mechanical resistant bioactive glass films by the radio-frequency magnetron sputtering method. The mechanical reliability of the bioactive glass films applied to real Ti dental implant fixtures has been evaluated by a procedure comprised of "cold" implantation in pig mandibular bone from a dead animal, followed by immediate tension-free extraction tests. The effects of the complex mechanical strains occurring during implantation were analysed by scanning electron microscopy coupled with electron dispersive spectroscopy. Extensive biocompatibility assays (MTS, immunofluorescence, Western blot) revealed that the bioactive glass films stimulated strong cellular adhesion and proliferation of human dental pulp stem cells, without promoting their differentiation. The ability of the implant coatings to conserve a healthy stem cell pool is promising to further endorse the fabrication of new osseointegration implant designs with extended lifetime.
Army Centre for Medical Research, Bucharest 020012, Romania.
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Popa
National Institute of Materials Physics, Magurele-Ilfov 077125, Romania. Electronic address: george_stan@infim.ro.
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Stan
National Institute of Materials Physics, Magurele-Ilfov 077125, Romania.
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Enculescu
"Victor Babes" National Institute of Pathology, Bucharest 050096, Romania.
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Tanase
Turin Polytechnic University in Tashkent, Tashkent 100174, Uzbekistan.
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Tulyaganov
Department of Materials and Ceramics Engineering, CICECO, University of Aveiro, Aveiro 3810-193, Portugal. Electronic address: jmf@ua.pt.
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Ferreira
D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry* / Q000494:pharmacology; D002454:Cell Differentiation / Q000187:drug effects; D002516:Ceramics / Q000737:chemistry*; D015921:Dental Implants; D006801:Humans; D060526:Magnetic Fields; D055595:Mechanical Phenomena; D011846:Radio Waves; D013234:Stem Cells / Q000166:cytology / Q000187:drug effects; D013552:Swine
D001672:Biocompatible Materials; C022107:Bioglass; D015921:Dental Implants
Bioglass; Coatings; Dental pulp stem cells biocompatibility; Magnetron sputtering; Titanium dental implants