IADR Abstract Archives
Bioactive Glass Air Abraded Coatings For Titanium Implants
Objectives: Coating of titanium implants with bioactive glasses by grit blasting can be used to potentially enhance osseointegration. This technique relies on the ability of the abrasive glass particles to embed in the surface of the titanium. The aim of the study is to investigate the effect of the propellant air pressure of the grit-blast machine and the abrasivity of the glass particles on the removal of the titanium from the surface.
Methods: Titanium disks of 10mm diameter and 1mm thickness were prepared from commercially pure titanium sheet. The disks were polished to a mirror surface and then abraded with three different sodium containing bioactive glasses of particle size 63-90µm. The abrading machine was set with three different propellant air pressures 2, 3 and 4 bar while, fixing the other variables such as the distance and the time of exposure. The samples were examined by white light profilometry for measuring the abraded line width, depth and volume loss. The cell morphology on both titanium and coated disks were studied by Scanning Electron Microscopy (SEM).
Results: The results showed that there is a significant decrease in the abraded area depth and volume on decreasing the sodium content of the bioactive glass at all pressures. However, changing the air pressure and glass composition has little effect on the abraded line width. The SEM results showed that the osteoblast cells varied in their attachment to both surfaces.
Conclusions: The glasses with the designed compositions were successfully embedded into the surface of the titanium and they are biocompatible. The glass particles across the titanium surface compensated for the removal of the substrate material.
Methods: Titanium disks of 10mm diameter and 1mm thickness were prepared from commercially pure titanium sheet. The disks were polished to a mirror surface and then abraded with three different sodium containing bioactive glasses of particle size 63-90µm. The abrading machine was set with three different propellant air pressures 2, 3 and 4 bar while, fixing the other variables such as the distance and the time of exposure. The samples were examined by white light profilometry for measuring the abraded line width, depth and volume loss. The cell morphology on both titanium and coated disks were studied by Scanning Electron Microscopy (SEM).
Results: The results showed that there is a significant decrease in the abraded area depth and volume on decreasing the sodium content of the bioactive glass at all pressures. However, changing the air pressure and glass composition has little effect on the abraded line width. The SEM results showed that the osteoblast cells varied in their attachment to both surfaces.
Conclusions: The glasses with the designed compositions were successfully embedded into the surface of the titanium and they are biocompatible. The glass particles across the titanium surface compensated for the removal of the substrate material.