Biologic response to passive dissolution of titanium craniofacial microplates.

Area of Science:

• Biomaterials Science
• Materials Science
• Medical Device Research

Background:

• Titanium implants are widely used in medical devices.
• Understanding the passive dissolution and biocompatibility of titanium is crucial.
• Anodization is a surface treatment method that can alter titanium's properties.

Purpose of the Study:

• To investigate the effect of anodization on the passive dissolution of titanium implants.
• To quantify titanium levels in peritoneal leukocytes and surrounding tissues.
• To assess the biocompatibility of anodized versus unanodized titanium implants.

Main Methods:

• Implantation of anodized and unanodized titanium plates into the peritoneal cavity of Sprague-Dawley rats.
• Measurement of titanium levels in peritoneal lavage fluid, blood, organ tissues, and capsular tissues.
• Histologic examination and quantification of titanium in peritoneal leukocytes over time.

Main Results:

• Titanium was not detected in distant organs or peritoneal lavage fluid.
• Capsular tissues surrounding implants showed lower titanium levels with anodized plates (888-5933 ng/g) compared to unanodized plates (2610-16786 ng/g).
• Peritoneal leukocytes showed significantly elevated titanium levels over time with unanodized implants, but not with anodized implants.

Conclusions:

• Surface treatment of titanium by anodization effectively reduces passive dissolution.
• Anodization enhances the biocompatibility of titanium implants by minimizing titanium ion release and subsequent inflammatory responses.