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Platelet-Derived Extracellular Vesicle Functionalization of Ti Implants
Published on: August 5, 2021
Anodic oxidized nanotubular titanium implants enhance bone morphogenetic protein-2 delivery
In-Ho Bae1, Kwi-Dug Yun, Hyun-Seung Kim
1Dental Science Research Institute and BK21 Project, School of Dentistry, Chonnam National University, Gwangju, Korea.
Journal of Biomedical Materials Research. Part B, Applied Biomaterials
|February 27, 2010
Summary
Functionalizing titanium implant surfaces with anodized titanium dioxide nanotubes improves osseointegration. This nanotubular structure enables sustained release of bone morphogenetic protein-2, enhancing its bioactivity for better bone healing.
Area of Science:
- Biomaterials Science
- Orthopedic Research
- Surface Engineering
Background:
- Implant failure is often linked to poor osseointegration and loosening from host bone.
- Enhancing osseointegration through functional implant surfaces that promote osteoblast differentiation is a key strategy.
- Recombinant human bone morphogenetic protein-2 (rhBMP-2) is crucial for bone healing and differentiation.
Purpose of the Study:
- To functionalize titanium (Ti) surfaces using anodic oxidation to create TiO(2) nanotubes.
- To load these functionalized surfaces with rhBMP-2 and evaluate its release kinetics and bioactivity.
- To investigate the potential of TiO(2) nanotubular structures for improved rhBMP-2 delivery and osseointegration.
Main Methods:
- Four groups of Ti surfaces were prepared: machined (M), anodized machined (MA), resorbable blast medium (RBM), and anodized RBM (RBMA).
- Surface characterization included scanning electron microscopy and contact angle measurements.
- rhBMP-2 release velocity, bioactivity (alkaline phosphatase activity, calcium deposition) were assessed.
Main Results:
- Anodized surfaces exhibited TiO(2) nanotubes (approx. 100 nm diameter, 500 nm length) and improved hydrophilic properties.
- rhBMP-2 showed a dispersed pattern on anodized surfaces, unlike the spherical morphology on non-anodized surfaces.
- Anodized surfaces provided sustained rhBMP-2 release and maintained its bioactivity, confirmed by alkaline phosphatase activity and calcium deposition.
Conclusions:
- The TiO(2) nanotubular structure created by anodic oxidation significantly enhances rhBMP-2 adsorption and delivery.
- This nanotubular configuration promotes sustained release of bioactive rhBMP-2, improving its efficiency.
- Anodized Ti surfaces with TiO(2) nanotubes show promise for enhancing osseointegration and reducing implant failure.
