Oxalic Acid Modified Metallic Oxide Surface for Osseointegration
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Solution Overview
Problem
Current methods for improving osseointegration of metallic implants, such as altering surface morphology and applying ceramic coatings, face challenges like instability, high costs, and the need for specialized equipment, while existing surface treatments may not adequately enhance the bond between implants and bone tissue.
Innovation Solution
A method involving treatment of metallic implants with an aqueous oxalic acid solution to create a hierarchical surface topography, combining micro and nanostructures, which promotes better cell attachment and bone formation, and optionally incorporating ionized lithium or strontium to enhance bone growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surface morphology is altered to improve osseointegration, then bone attachment is enhanced, but manufacturing complexity and cost increase
Solution Approach 1:
The invention changes the chemical composition parameters of the implant surface by applying an oxalic acid treatment that modifies the oxide layer properties. This chemical parameter change creates a hierarchical surface topography with micro and nanostructures that enhance osseointegration without requiring complex mechanical surface alteration processes.
Solution Approach 2:
The invention creates a composite surface structure combining the base metallic implant material with an oxalic acid-modified oxide layer. This composite surface topology integrates microstructural features (micropits) and nanostructural features (nanoprotrusions) to achieve enhanced bone attachment while maintaining manufacturing simplicity.
2Reliability
If ceramic coatings are applied to enhance bone bond, then osseointegration improves, but manufacturing cost and equipment requirements increase
Solution Approach 1:
The invention replaces expensive ceramic coatings with a cost-effective oxalic acid chemical treatment. This simple chemical process can be applied to standard metallic implants using conventional equipment, eliminating the need for specialized ceramic coating facilities while achieving comparable or superior bone bonding.
Solution Approach 2:
The invention substitutes mechanical ceramic coating processes with a chemical oxalic acid treatment process. This chemical approach modifies the implant surface oxide layer to create hierarchical topography, replacing complex mechanical coating operations with a simpler chemical etching and reaction process.
3Loss of time
If immediate or early loading is performed to reduce healing time, then patient comfort improves, but implant stability must be sufficient to prevent failure
Solution Approach 1:
The invention applies preliminary chemical surface treatment with oxalic acid before implant insertion to pre-condition the surface for enhanced bone bonding. This preliminary action creates the hierarchical surface topography in advance, ensuring that when the implant is loaded immediately or early, the bone-implant bond is already optimized to withstand functional forces.
Solution Approach 2:
The invention changes the surface chemical and topographical parameters through oxalic acid treatment to enhance initial bone bonding. This parameter modification allows the implant to achieve sufficient stability for immediate or early loading by strengthening the interfacial bond between the implant surface and surrounding bone tissue.
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 method results in improved osseointegration and biomechanical interaction with bone tissue, providing a stronger and more stable bond, reduced tissue layer strength, and enhanced bone formation, while being cost-efficient and easily applicable industrially.
Implementation Method 1
treating at least a part of said component, which part is covered by said metallic oxide, with an aqueous composition comprising oxalic acid, whereby a modified metallic oxide is obtained
Implementation Method 2
The surface of the biocompatible component obtained by the inventive method has a hierarchical surface topography comprising a microstructure and a primary nanostructure
Implementation Method 3
The inventors have found that by treating a component having a metallic oxide surface by oxalic acid, a modified surface structure of the component is obtained, which has improved properties for implantation into living bone
Implementation Method 4
improved osseointegration and biomechanical interaction with bone tissue, providing a stronger and more stable bond
Implementation Method 5
optionally incorporating ionized lithium or strontium to enhance bone growth
Data Source
AI summary
The invention relates to a method for modification of a biocompatible component. The method of the invention includes the steps of a) providing a biocompatible component at least partly covered by metallic oxide; and b) treating at least a part of the component, which part is covered by the metallic oxide, with an aqueous composition that includes oxalic acid; whereby a modified metallic oxide, is obtained. The invention also relates to a biocompatible component-including a substrate having a surface with a) a microstructure including pits separated by plateus and/or ridges; and b) a primary nanostructure being superimposed on the microstructure, the primary nanostructure having depressions arranged in a wave-like formation.