Assessment of anodized titanium implants bioactivity.

Area of Science:

• Biomaterials Science
• Surface Engineering
• Orthopedic Implants

Background:

• Titanium implants are widely used in orthopedics and dentistry.
• Enhancing implant bioactivity is crucial for osseointegration and clinical success.
• Current methods for surface modification require further optimization for accelerated healing.

Purpose of the Study:

• To create nanostructured titanium implant surfaces using anodic oxidation.
• To evaluate the bioactivity of these modified surfaces in vitro and in vivo.
• To assess the potential for early loading of these enhanced implants.

Main Methods:

• Anodic spark discharge was employed to create nanoporous surfaces on commercially pure titanium (cpTi).
• In vitro studies involved analyzing surface morphology, chemistry, roughness, and crystalline structure.
• Bioactivity was assessed by immersion in simulated body fluid (SBF) and in vivo implantation in rabbit tibiae, followed by biomechanical and histological analyses.

Main Results:

• Anodic oxidation resulted in significant morphological changes, increased oxygen content, and altered crystallinity of the titanium oxide (TiO₂) layer.
• In vitro tests demonstrated calcium phosphate precipitation on the titanium surfaces within 7 days of SBF immersion.
• In vivo studies showed enhanced implant-bone interface shear strength at 2 weeks, supported by histological evidence of favorable bone tissue response.

Conclusions:

• Nanostructured titanium surfaces can be effectively prepared using anodic oxidation.
• The resulting nanostructured implants exhibit accelerated bioactivity.
• These findings suggest that nanostructured titanium implants may be suitable for early loading protocols.