Implant Coating Intermediate Layer for Ion Leakage
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Solution Overview
Problem
Existing implants, such as hip and knee joint endoprostheses, face issues with metal ion leakage from the implant material through the hard material coating, leading to increased corrosion and wear, reduced service life, and potential allergic reactions due to the release of ions like cobalt, chromium, and nickel.
Innovation Solution
Incorporating an intermediate layer between the hard material coating and the implant material to reduce mechanical and electromechanical tension, which acts as a barrier to prevent metal ion leakage and enhance the adherence of the hard material coating, thereby reducing corrosion and wear, and using a multilayered hard material coating system with a metal ion barrier to minimize ion loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a hard material coating is applied to the joint surface to reduce wear, then wear resistance is improved, but metal ion leakage increases due to coating defects and tension
Solution Approach 1:
An intermediate layer is introduced between the implant material and the hard material coating. This intermediate layer acts as a mediator that reduces mechanical and electromechanical tension between the coating and the implant material, thereby preventing coating defects and metal ion leakage while maintaining wear resistance.
Solution Approach 2:
The implant structure is designed as a composite system consisting of multiple layers: the implant material base, an intermediate layer with specific mechanical properties, and the hard material coating. This composite structure optimizes both wear resistance and biocompatibility by distributing mechanical stresses across layers with different properties.
2Duration of action of stationary object
If a hard material coating is applied to the joint surface to extend service life, then durability is improved, but corrosion increases due to coating defects
Solution Approach 1:
The intermediate layer serves as a protective mediator that eliminates the direct contact between the implant material and the hard coating, thereby preventing corrosion pathways through coating defects while allowing the coating to provide its wear-resistant function for extended service life.
Solution Approach 2:
The intermediate layer provides beforehand cushioning by absorbing and distributing mechanical and electromechanical tensions before they can reach the implant material through coating defects, thereby preventing corrosion before it occurs.
3Strength
If a hard material coating is applied to the joint surface to reduce wear, then wear resistance is improved, but adhesion decreases due to mechanical tension
Solution Approach 1:
The intermediate layer acts as an adhesion-promoting intermediary between the implant material and the hard coating. By matching mechanical properties and reducing tension, it creates a stable bond that prevents coating delamination while maintaining the wear-resistant properties of the outer coating layer.
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 intermediate layer significantly reduces metal ion leakage and corrosion, extends the service life of the implant, and improves compatibility by minimizing wear and tear, while the multilayered coating system enhances fatigue resistance and adhesion, reducing ion loss by at least a factor of 20 compared to conventional implants.
Implementation Method 1
an intermediate layer is provided between the hard material coating and the at least one joint surface formed from the implant material for the purpose of reducing tension between the hard material coating and the implant material
Implementation Method 2
an intermediate layer is provided between the hard material coating and the at least one joint surface formed from the implant material for the purpose of reducing tension between the hard material coating and the implant material
Implementation Method 3
This leads to an increase in corrosion and also to an increase in the wear and tear on the implant, for example, due to flaking of the hard material coating. The negative effects described have the disadvantage that, as a result, the service life of the implant as well as the compatibility of the implant can be reduced; for example, the leakage of metal ions to a great extent from the implant material can cause allergic reactions.
Implementation Method 4
the multilayered coating system enhances fatigue resistance and adhesion, reducing ion loss by at least a factor of 20 compared to conventional implants
Data Source
AI summary
An implant for insertion into a human or animal body which comprises at least one implant part is provided. The at least one implant part has a base member which is produced from an implant material and has a surface which is designed at least partially in the form of an artificial joint surface. Part of or the entire joint surface is covered with a wear-reducing hard material coating, such that a service life of the implant is extended and the compatibility of the implant increased. An intermediate layer is provided between the hard material coating and the at least one joint surface formed from the implant material for the purpose of reducing tension between the hard material coating and the implant material. A corresponding method for production of an implant is also provided.