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Surface Modification of Porous Titanium Granules for Improving Bioactivity
The International Journal of Oral & Maxillofacial Implants
|November 19, 2016
Summary
Surface modification of titanium granules using anodizing and heat treatment significantly enhances their bioactivity for bone repair. This optimized process creates a nanostructured oxide layer, improving bone bonding ability.
Area of Science:
- Biomaterials Engineering
- Surface Science
- Orthopedic Research
Background:
- Highly porous titanium granules are utilized as bone substitutes.
- Current limitations include poor bone bonding ability.
- Surface bioactivity enhancement is crucial for effective bone augmentation.
Purpose of the Study:
- To develop a nanostructured surface oxide layer on titanium granules.
- To improve the bioactivity and bone bonding of titanium granules.
- Utilizing optimized electrochemical anodic oxidation and heat treatment.
Main Methods:
- Titanium granules underwent anodic oxidation in an ethylene glycol-based electrolyte (60 V, 3 hours).
- Anodized granules were annealed at 450°C for 1 hour.
- Surface characterization used SEM, EDS, and XRD; in vitro bioactivity assessed via SBF immersion and MG63 cell viability (MTT assay).
Main Results:
- Anodizing formed an amorphous nanostructured titanium oxide layer.
- Heat treatment converted the oxide to crystalline anatase and rutile phases.
- In simulated body fluid, hydroxyapatite formation was observed on anodized-annealed samples; no cytotoxicity detected.
Conclusions:
- Anodic oxidation followed by heat treatment is an effective surface modification strategy.
- This method significantly improves the bioactivity of titanium granules.
- The enhanced titanium granules show promise for bone tissue repair and augmentation.
