Microporous Ceramic Coating on Titanium Nails
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Solution Overview
Problem
Existing titanium nails used in surgical applications face issues with wear debris causing toxicity, immune reactions, and secondary infections due to the peeling of drug-loaded polymer layers, leading to adverse reactions such as thrombosis and rejection.
Innovation Solution
A method for preparing a titanium nail with a microporous ceramic layer formed by treating the surface with a heated alkaline solution, followed by the creation of hyaluronic acid-alginic acid microspheres and a titanium sol solution, which is then coated and roasted to form a microporous titanium dioxide film, preventing exfoliation and allowing for targeted, slow-release drug delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polymer compound is used as the adhesive agent and drug-loaded layer, then the drug delivery function is improved, but the layer peels and sheds causing adverse reactions
Solution Approach 1:
The patent applies a porous coating layer made of biocompatible ceramic material (titanium oxide) with controlled pore size (0.5-5 μm) that serves as both the adhesive layer and drug reservoir. The porous structure allows drug loading and controlled release while the ceramic material prevents peeling and shedding, eliminating the harmful effects of polymer layer degradation.
Solution Approach 2:
The patent creates a composite structure combining the metal nail body with a ceramic coating layer. This composite material approach integrates the structural integrity of metal with the biocompatibility and drug delivery capabilities of ceramic, achieving both mechanical strength and safe drug release without polymer degradation issues.
2Reliability
If a drug-loaded polymer layer is applied on the metal implant surface, then the therapeutic effect is improved, but wear debris causes toxicity and immune reactions
Solution Approach 1:
The porous ceramic coating layer provides a stable matrix for drug incorporation and release. The ceramic material itself is biocompatible and does not generate toxic wear debris, while the porous structure enables sustained drug delivery to maintain therapeutic effect throughout the implant's service life.
Solution Approach 2:
The patent uses biocompatible ceramic material that is inherently stable and non-degradable in a beneficial sense - it remains intact without generating harmful debris, providing long-term reliability without the wear issues of polymer materials.
3Reliability
If the titanium nail surface is treated to improve drug loading, then the drug delivery capability is improved, but the surface complexity increases
Solution Approach 1:
The patent employs a sol-gel process to create a porous titanium oxide coating layer directly on the nail surface. This chemical deposition method produces the desired porous structure in a relatively simple, controllable process without requiring complex mechanical or thermal treatments, achieving high drug loading capacity with manageable process complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The microporous ceramic layer enhances corrosion resistance, prevents wear debris, and enables stable, uniform drug distribution and slow release, reducing adverse reactions and improving tissue interaction.
Implementation Method 1
treating the surface of the titanium nail body by a heated alkaline solution
Implementation Method 2
a microporous titanium dioxide film on a surface of the coated titanium nail
Implementation Method 3
with the hyaluronic acid and the alginic acid dissolving and stripping in the hot water, forming a microporous titanium dioxide film
Implementation Method 4
enables stable, uniform drug distribution and slow release
Implementation Method 5
importing the drugs to be loaded, which are dissolved in a volatile organic solvent, in a vacuum condition
Data Source
AI summary
The present invention discloses a preparation method of a titanium nail capable of loading a drug. The titanium nail capable of loading a drug includes a titanium nail body capable of loading a drug, and a microporous ceramic layer capable of loading a drug arranged on the surface of the titanium nail body. The steps of the method include: pretreating the surface of the titanium nail body, preparing a microporous mould for hyaluronic acid-alginic acid microspheres, preparing a titanium sol solution, coating film, pore-forming and roasting. The present invention also discloses a titanium nail capable of loading a drug obtained by the preparation method above, and a drug-loaded titanium nail prepared with the titanium nail capable of loading a drug and a preparation method thereof. With the microporous ceramic layer on the surface of the titanium nail body, it is hard for the metal ions on the surface of the titanium nail to penetrate the human body, due to the properties of corrosion resistance and wear resistance of the ceramics. Further, it fails to generate the exfoliations and the wear debris to prevent the human body from "wear debris disease" and reaction to a foreign body. Moreover, various drugs such as the antibacterial drugs, and the drugs for promoting the healing etc. can be loaded, targeted and slow-released, which is good for medical usage.