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Surface studies on titanium IMZ implants
M Kuliralo1, J J Pireaux, R Caudano
1Laboratoire de Prothèse, Faculté de Médecine, Université Libre de Bruxelles, Belgique.
Journal De Biologie Buccale
|September 1, 1991
Summary
Surface analysis of IMZ implants revealed significant changes after one year in vivo. Implanted surfaces showed reduced roughness and titanium dioxide (TiO2) layer degradation, indicating material alteration during osseointegration.
Area of Science:
- Biomaterials Science
- Dental Implantology
- Surface Engineering
Background:
- The IMZ implant's surface characteristics are crucial for osseointegration and long-term success.
- Understanding surface changes after implantation is vital for evaluating implant performance and biocompatibility.
Purpose of the Study:
- To investigate the surface features of new and one-year retrieved IMZ implants.
- To analyze changes in surface topography, composition, and titanium dioxide (TiO2) layer thickness.
Main Methods:
- Surface analysis using Scanning Electron Microscopy (SEM) for topography.
- X-ray Electron Spectroscopy (XPS) and Rutherford Back-Scattering Spectroscopy (RBS) for elemental composition and TiO2 thickness.
- Surface roughness and profilometric measurements.
Main Results:
- New IMZ implants exhibited a rough, granular surface; retrieved implants showed smoother surfaces with reduced roughness (Ra 1.91 vs 4.93 microns).
- XPS revealed TiO2, C, and O on sterilized new surfaces, while retrieved implants showed Ca, C, O, and N, with absent TiO2.
- RBS indicated a significant decrease in TiO2 thickness from 0.5-0.7 microns (new) to 0.03-0.2 microns (retrieved).
Conclusions:
- IMZ implant surfaces undergo significant topographical and compositional changes one year post-implantation.
- The titanium dioxide layer degrades substantially in vivo, potentially influencing implant-tissue interactions and stability.