3D Grid Implant with Thick Frame Bars for Bone Integration
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Solution Overview
Problem
Existing implant devices for osseous integration, composed of single materials like metal or biomedical polymers, face issues with delamination and unwanted shifting due to sudden impacts or prolonged extrusion stress from bone tissues, as they lack sufficient bonding strength and compatibility with human bone tissues.
Innovation Solution
A 3D grid structure implant device is designed, featuring connection bars and frame bars with a larger diameter, along with a polymer body and metal interface layers, forming a frictional or connecting interface to enhance rigidity and biocompatibility, thereby preventing delamination and shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal material is used for implant devices, then strength of support and osseo-integration is improved, but stress shielding effect occurs causing bone tissue structure to collapse
Solution Approach 1:
The implant device uses a composite structure combining metal connection bars (for strength and osseo-integration) with biomedical polymer filling material (for stress distribution). This composite design allows the metal framework to provide structural support while the polymer material distributes stress to prevent stress shielding effect and bone tissue collapse.
Solution Approach 2:
Different parts of the implant device have different material properties: the metal connection bars provide high strength and rigidity where structural support is needed, while the biomedical polymer filling material provides stress-distributing properties where stress shielding prevention is needed. This local differentiation of material qualities resolves the contradiction between strength and stress shielding.
2Object-affected harmful factors
If biomedical polymer material is used for implant devices, then stress shielding effect is reduced, but bonding strength with bone tissues is insufficient causing delamination and shifting
Solution Approach 1:
The implant device combines biomedical polymer filling material (for stress distribution and reduced stress shielding) with metal connection bars (for bonding strength and structural integrity). The composite structure allows the polymer to contact bone tissues for stress distribution while the metal framework provides sufficient bonding strength to prevent delamination and shifting.
Solution Approach 2:
The implant device applies different material qualities to different functional regions: biomedical polymer material is used where stress distribution and bone contact are needed, while metal material is used where bonding strength and structural support are required. This local differentiation resolves the contradiction between reducing stress shielding and maintaining bonding strength.
3Adaptability or versatility
If composite material composed of metal and biomedical polymer is used, then benefits of both materials are obtained, but bonding strength is insufficient resisting sudden impact or prolonged extrusion stress
Solution Approach 1:
The implant device is segmented into distinct functional components: metal connection bars forming a framework structure and biomedical polymer filling material. This segmentation allows each component to perform its specialized function while working together, with the metal framework providing impact resistance and the polymer providing biocompatibility and stress distribution.
Solution Approach 2:
The implant device uses a composite structure where metal connection bars provide high strength and rigidity to resist sudden impacts and prolonged extrusion stresses, while biomedical polymer filling material provides biocompatibility and stress distribution. The synergistic combination of these materials resolves the contradiction between adaptability and bonding strength.
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 3D grid structure provides enhanced rigidity to resist surgical and extrusion stresses, ensuring secure integration with bone tissues and preventing delamination, while the polymer body's similar elastic modulus to bone tissues reduces stress shielding and promotes tissue growth, addressing the limitations of single-material implants.
Implementation Method 1
a polymer body contained within the 3D grid structure to form a frictional interface having a contact area directly in contact with the 3D grid structure
Data Source
AI summary
An implant device for osseous integration includes a plurality of connection bars and at least one frame bar. These connection bars are connected with each other to form a three-dimensional (3D) grid structure. The frame bar is connected with at least two of the connection bars to define at least one edge of the 3D grid structure. Wherein, the frame bar has a diameter substantially greater than that of these connection bars.