In Vitro Implant Testing Apparatus
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Solution Overview
Problem
Current methods for testing biomaterials for implants are limited as they separate mechanical and biological testing, failing to simulate in vivo conditions effectively, which is crucial for determining biocompatibility and osteogenesis potential.
Innovation Solution
A method and apparatus that combine controlled mechanical loading with biological and chemical stimuli in a liquid media to simulate in vivo conditions, allowing non-destructive evaluation of biomaterials for load-bearing implants, including controlled fluid flow and mechanical deformation to assess biocompatibility and osteointegration potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical testing and biological testing are conducted separately, then testing simplicity is maintained, but the ability to simulate in vivo conditions is insufficient
Solution Approach 1:
The patent combines mechanical testing and biological testing into a single integrated test system. The test specimen is subjected to mechanical loading while simultaneously exposed to liquid media containing living cells, allowing both mechanical performance and biological response to be evaluated together in a unified apparatus that simulates in vivo conditions more accurately
Solution Approach 2:
The test system performs multiple functions simultaneously: it applies mechanical loads (compression, tension, bending), maintains controlled liquid media environment, and monitors biological cell responses. This multi-functional apparatus replaces separate testing procedures with a single comprehensive test that evaluates both mechanical and biological properties
2Measurement precision
If conventional mechanical tests are performed, then material strength parameters are determined, but biological activity assessment is not achieved
Solution Approach 1:
The patent merges mechanical testing and biological activity assessment into a single simultaneous process. While mechanical loads are applied to the test specimen, liquid media with living cells is circulated around it, allowing both mechanical parameter determination and biological response evaluation to occur together rather than requiring separate testing sequences
3Reliability
If destructive fatigue tests are conducted, then practical material limits are determined, but the specimen cannot be reused for further testing
Solution Approach 1:
The patent applies partial mechanical loading that does not exceed the elastic limit of the material, avoiding destructive failure. By using non-destructive loading levels, the test specimen remains intact and can be reused for multiple testing cycles, eliminating the time loss associated with preparing new specimens for each test
Data Source
AI summary
The invention relates to a method for in vitro testing of specimens, such as biomaterials or implants, wherein the method comprises at least immersing at least a part of the test specimen into a liquid media, controlling the liquid media, controlling surrounding environment, providing a predetermined non-destructive force to the specimen, and measuring reactions of the specimen or constituents of the liquid media. Further it relates to an apparatus for in vitro testing.