Nano- and Micro-Scale Oxidative Patterning of Titanium Implant Surfaces for Improved Surface Wettability

Area of Science:

• Materials Science
• Surface Chemistry
• Biomaterials Engineering

Background:

• Titanium (Ti) is a widely used biomaterial, particularly for dental and orthopedic implants, due to its biocompatibility and mechanical properties.
• Surface properties of titanium implants significantly influence osseointegration and overall clinical success.
• Existing surface modification techniques can be complex, costly, or environmentally concerning.

Purpose of the Study:

• To develop a simple, scalable, and eco-friendly surface modification treatment for titanium.
• To introduce hierarchical nano- and microscale features onto titanium surfaces.
• To evaluate the impact of the novel surface treatment on surface roughness and wettability.

Main Methods:

• A novel oxidative aqueous solution composed of hydrogen peroxide (H2O2) and sodium bicarbonate (NaHCO3) was formulated.
• Mirror-polished titanium (Ti) discs were immersed in the H2O2/NaHCO3 solution at 23 ± 3°C for 4 hours.
• Surface topography, roughness, and wettability of the treated Ti surfaces were analyzed and compared to control surfaces.

Main Results:

• The H2O2/NaHCO3 treatment successfully generated microscale topographies on Ti surfaces.
• Regularly arranged, comb-like nanochannels were simultaneously formed, creating a hierarchical surface structure.
• The nano/micro-textured Ti surfaces exhibited significantly increased surface roughness and excellent wettability compared to untreated Ti surfaces.

Conclusions:

• The H2O2/NaHCO3 mixture provides an effective, economical, and safe method for creating reproducible nano/microscale topographies on titanium surfaces.
• This novel surface modification treatment holds promise for enhancing the performance of titanium implants.
• The eco-friendly nature of the process aligns with sustainable manufacturing practices in the biomaterials field.