Porous Bone Augmentation Material via Pressurized Mixing
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Solution Overview
Problem
Current bone filling materials used in procedures like vertebroplasty do not match the material properties of native bone, leading to potential damage and complications due to uneven stress distribution and high modulus of elasticity.
Innovation Solution
A method and system for forming a bone augmentation material by mixing bone filling materials with gaseous voids, pressurizing to retain voids, and injecting the material into the bone to create a hardened, porous structure that matches the modulus of elasticity of the target bone region, using a two-component system like PMMA or other suitable materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bone filling material is used to augment bone, then bone support is provided, but the high modulus of elasticity causes uneven stress distribution and potential damage
Solution Approach 1:
The patent introduces a porous structure into the bone filling material by trapping gas voids within the material matrix. This porous structure reduces the overall modulus of elasticity of the material to better match native bone, thereby distributing stress more evenly and reducing the harmful stress concentrations that occur with dense, high-modulus materials.
Solution Approach 2:
The patent creates a composite material system consisting of the bone filling material matrix combined with trapped gas voids. This composite structure achieves a lower effective modulus of elasticity compared to the base material alone, allowing the augmentation material to better match the mechanical properties of native bone while maintaining structural support.
2Object-affected harmful factors
If gas voids are introduced to reduce modulus of elasticity, then stress distribution improves, but voids may escape during mixing and injection
Solution Approach 1:
The patent employs pressurization techniques to control the behavior of gas voids during the mixing and injection processes. By applying pressure to the system, the voids are kept trapped within the material matrix and prevented from escaping, ensuring that the desired porous structure is maintained throughout material handling and delivery.
3Reliability
If pressure is applied to retain voids, then void retention improves, but mixing and injection complexity increases
Solution Approach 1:
The patent combines the pressurization function with the existing mixing and injection system. The pressurization source is integrated into the material delivery system, allowing void retention to be achieved without requiring completely separate or additional complex equipment. The pressurization is applied in conjunction with the mixing and injection processes rather than as a separate step.
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 solution reduces the risk of fracture and damage by creating a bone augmentation material with a lower modulus of elasticity, matching the natural bone, thereby minimizing stress concentrations and promoting uniform stress distribution.
Implementation Method 1
pressurizing the vessel with a pressurization source to retain a plurality of voids within the bone augmentation material
Data Source
AI summary
A method for treating a vertebral bone comprises providing a bone filling material and mixing the bone filling material in a vessel to form a bone augmentation material. The method further comprises pressurizing the vessel with a pressurization source to retain a plurality of voids within the bone augmentation material. The method further includes inserting a material delivery device into the vertebral bone and injecting the bone augmentation material with the retained plurality of voids from the material delivery device and into the vertebral bone.