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Updated: Aug 26, 2025
High-throughput Identification of Bacteria Repellent Polymers for Medical Devices
Published on: November 5, 2016
Antibacterial nanopatterned coatings for dental implants
Raul Fontelo1,2, Diana Soares da Costa1,2, Manuel Gomez-Florit1,2
13B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Portugal. ramon.novoa@i3bs.uminho.pt.
Block copolymer nanopatterns on titanium show potential for dental implants. These coatings exhibit bactericidal effects against oral bacteria while maintaining good biocompatibility for tissue integration.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Microbiology
Background:
- Dental implants made of titanium are susceptible to bacterial infections and inflammation from oral microflora.
- Developing effective strategies to prevent bacterial adhesion and proliferation on implant surfaces is crucial for long-term success.
Purpose of the Study:
- To investigate the bactericidal effects of block copolymer nanopatterned titanium substrates against Gram-positive and Gram-negative bacteria.
- To evaluate the biocompatibility of these nanopatterned coatings with human gingival fibroblasts and macrophages for tissue integration.
Main Methods:
- Titanium substrates were coated with block copolymer nanopatterns.
- Bactericidal efficacy was tested against Gram-positive and Gram-negative bacteria.
- Cell attachment, morphology, and macrophage markers (CCR7, CD206) were analyzed using immunostaining assays.
Main Results:
- Nanopatterned coatings demonstrated significant bacterial death (up to 90% in 90 min) depending on morphology, surface chemistry, and bacterial strain.
- Human gingival fibroblasts showed comparable attachment and morphology on nanopatterned surfaces and bare titanium.
- Macrophages exhibited similar levels of CCR7 and CD206 on nanopatterned coatings and bare titanium, with a slight increase in aspect ratio suggesting potential M2 polarization.
Conclusions:
- Block copolymer nanopatterned titanium coatings offer a promising approach to combat bacterial infections on dental implants.
- The coatings exhibit good biocompatibility, supporting fibroblast attachment and potentially promoting favorable macrophage responses for tissue integration.
