Hydrogel Mid-Foot Implant With Porous Bone Integration
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Solution Overview
Problem
Existing implants fail to effectively repair and provide durable articulation surfaces in joints, particularly in the mid-foot region, due to inadequate integration with bone structures and lack of robust stability.
Innovation Solution
Hydrogel implants with hybrid structures, comprising a porous material portion, a hydrogel portion, and a bone plate portion, are designed to integrate with bone surfaces, promoting cancellous bone growth and stability, utilizing materials like porous titanium foam and surgical grade metals for secure attachment and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional implants are used to replace articulation surfaces, then the joint can be reconstructed, but the implants fail to provide durable repair and robust stability due to inadequate integration with bone structures
Solution Approach 1:
The implant uses a composite structure combining hydrogel material for the articulation surface with porous bone-contacting surfaces for structural support and bone integration. This composite approach allows the implant to simultaneously provide durable cartilage replacement and robust bone integration, resolving the contradiction between repair durability and bone structure integration.
Solution Approach 2:
The bone-contacting surfaces are designed with porous structures that promote cancellous bone growth and ingrowth. This porous architecture enables mechanical interlocking and biological integration with bone structures, providing robust stability while supporting the articulation surface replacement function.
2Reliability
If the implant uses hybrid structures with porous material and hydrogel portions, then bone integration and stability are enhanced, but the device complexity increases
Solution Approach 1:
The implant is divided into distinct functional segments: a hydrogel portion for articulation surface replacement and porous bone-contacting portions for structural support and bone integration. This segmentation allows each portion to be optimized for its specific function while maintaining overall system reliability, managing complexity through functional modularity.
Solution Approach 2:
The hybrid structure serves multiple functions simultaneously: the hydrogel portion provides low-friction articulation, the porous portions provide structural support and bone integration, and the overall design enables both mechanical stability and biological integration. This multi-functionality justifies the increased structural complexity by delivering comprehensive therapeutic benefits.
3Duration of action of moving object
If the implant is designed for rapid ingrowth and fixation, then the duration of action is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The porous bone-contacting surfaces are engineered with specific pore sizes and distributions that promote rapid cancellous bone ingrowth and mechanical interlocking. This controlled porosity accelerates fixation while maintaining manufacturing feasibility through established porous material fabrication techniques.
Solution Approach 2:
The implant design incorporates specific geometric parameters of the porous structures, such as pore size, porosity percentage, and surface area, that are optimized to promote rapid bone ingrowth. By carefully controlling these parameters within manufacturable ranges, the design achieves rapid fixation without requiring excessive manufacturing precision.
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 hydrogel implants provide robust and durable repair of articulation surfaces by enhancing bone integration and stability, facilitating rapid ingrowth and fixation, while allowing for potential drug delivery and growth factor promotion.
Implementation Method 1
a porous material portion having a first bone-engaging surface... promoting cancellous bone growth and stability
Implementation Method 2
a hydrogel portion that is bonded to the porous material portion and forming an articulation surface... providing robust and durable repair of articulation surfaces
Implementation Method 3
a bone plate portion configured for securing the implant to a bone that forms the joint... having at least one screw hole for receiving a bone screw
Data Source
AI summary
A novel implant for replacing a portion of an articulation surface of a joint is disclosed. The implant includes a bone-engaging surface, a hydrogel portion forming an articulation surface opposite from the first bone-engaging surface, and a bone plate portion configured for securing the implant to a bone that forms the joint.