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Platelet-Derived Extracellular Vesicle Functionalization of Ti Implants
Published on: August 5, 2021
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Relevant aspects in the surface properties in titanium dental implants for the cellular viability
E Velasco-Ortega1, C A Alfonso-Rodríguez2, L Monsalve-Guil1
1Department of Stomatology, Faculty of Dentistry, University of Seville, Seville, Spain.
Summary
Dental implant surface roughness significantly impacts osseointegration. Sandblasted titanium surfaces, while rougher, showed superior cell adhesion and bone growth in vivo, leading to better implant success.
Area of Science:
- Biomaterials Science
- Dental Implantology
- Surface Engineering
Background:
- Osseointegration of dental implants is crucial for success.
- Surface properties, particularly roughness and topography, significantly influence osseointegration.
- Common titanium implant surfaces include machined, sandblasted, acid-etched, and combined treatments.
Purpose of the Study:
- To investigate the effect of different titanium surface topographies on cell behavior and osseointegration.
- To compare the roughness, wettability, and in vitro/in vivo cell responses of four common dental implant surfaces.
- To correlate surface properties with the potential for enhanced bone growth and implant stability.
Main Methods:
- Surface characterization using 3D-interferometric microscopy and sessile drop method (wettability).
- In vitro cell culture studies with human gingival fibroblasts (HGF) and osteoblast-like cells (SAOS-2) to assess cell integrity and adhesion.
- In vivo subcutaneous implantation in Wistar rats to evaluate cell adhesion and tissue integration.
Main Results:
- Sandblasted surfaces exhibited significantly higher roughness compared to acid-etched and machined surfaces.
- Increased roughness on sandblasted samples correlated with decreased wettability and surface free energy, favoring protein adsorption.
- In vitro, cell density was lower on sandblasted surfaces, but in vivo, sandblasted and acid-etched surfaces showed significantly higher cell and connective tissue coverage.
- Cells on rougher surfaces displayed characteristics of more differentiated osteoblasts.
Conclusions:
- Surface roughness is a critical factor for dental implant osseointegration.
- Sandblasted and acid-etched titanium surfaces promote superior cell adhesion and tissue integration compared to machined surfaces.
- These findings support the use of roughened titanium surfaces for improved bone contact and enhanced osseointegration in dental implants.
