Voronoi Macroporous Bone Implants for Irregular Defect Fitting
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Solution Overview
Problem
Current biomaterials for repairing bone defects, particularly craniomaxillofacial defects, face challenges in achieving the necessary mechanical properties for effective bone regeneration due to the complexity of bone regeneration processes and the irregular shapes of defects, requiring materials that can be both osteogenic and mechanically robust while fitting well to the defect site.
Innovation Solution
The development of composite materials with a macroporous structure featuring a Voronoi architecture and integrated microporous biomaterials, such as mineralized collagen, which are designed to provide mechanical stability and osteogenic properties, allowing for precise fitting and shaping to accommodate irregular defect sizes and shapes through additive manufacturing and lyophilization processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a biomaterial is designed to be stiff enough to promote new bone formation, then mechanical strength is improved, but the ability to fit well to irregular defect sites and be easy to handle deteriorates
Solution Approach 1:
The patent applies local quality by creating a composite material with spatially varying properties: the macroporous structure provides mechanical strength and stiffness where needed, while the integrated microporous biomaterial (collagen, glycosaminoglycans, or calcium phosphate) provides flexibility and ease of handling. This local differentiation allows the material to simultaneously achieve both strength and manufacturability.
Solution Approach 2:
The patent uses composite materials by combining a macroporous structural framework with an integrated microporous biomaterial. The macroporous structure (providing mechanical integrity) is composite with the biomaterial (providing bioactivity and flexibility), creating a material that achieves both strength and ease of handling through synergistic combination of different material phases.
2Reliability
If a biomaterial is designed to promote new bone formation, then osteogenic activity is improved, but the mechanical robustness deteriorates
Solution Approach 1:
The patent applies local quality by assigning different functional zones within the composite structure: the macroporous structure provides mechanical robustness and structural integrity, while the integrated microporous biomaterial (containing collagen, glycosaminoglycans, or calcium phosphate) provides osteogenic activity. This spatial separation of functions allows both requirements to be satisfied simultaneously.
Solution Approach 2:
The patent uses composite materials to reconcile osteogenic activity with mechanical robustness. The macroporous framework provides the mechanical robustness needed for load-bearing applications, while the integrated biomaterial provides the osteogenic properties necessary for bone regeneration, creating a composite that satisfies both biological and mechanical requirements.
3Adaptability or versatility
If a biomaterial is designed to fit irregular defect shapes, then adaptability is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent applies local quality by creating a composite structure where the macroporous architecture can be locally adapted to fit irregular defect geometries while maintaining consistent material properties. The Voronoi or other macroporous patterns can be scaled and shaped to match the specific defect morphology, allowing high adaptability without sacrificing the precision of the material's intrinsic properties.
Solution Approach 2:
The patent uses parameter changes by adjusting the scale, orientation, and distribution of the macroporous structure to match the specific defect geometry. The Voronoi or other macroporous patterns can be parameterized to create variations in pore size, spacing, and orientation that optimize the fit to irregular shapes while maintaining manufacturing precision through controlled parameter modification.
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
These composite materials effectively promote bone regeneration by providing mechanical strength, conformal fitting, and osteogenic activity, addressing the limitations of existing biomaterials in terms of mechanical robustness and adaptability to irregular defect geometries.
Implementation Method 1
a macroporous structure having a Voronoi architecture and a microporous biomaterial integrated into the macroporous structure
Implementation Method 2
contacting a macroporous structure having a Voronoi architecture with a solution including a liquid suspension of a biomaterial and removing the liquid from the solution, for example by lyophilization
Implementation Method 3
the macroporous structure is produced using an additive manufacturing method
Data Source
AI summary
Composite materials including a macroporous structure having a Voronoi architecture and a microporous biomaterial integrated into the macroporous structure are provided. Methods of making the composite materials and methods of using the materials to treat a bone defect are also provided.