Bone Particle Vertebral Stabilization Without Exothermic Cement
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Solution Overview
Problem
Current treatments for osteoporotic compression fractures, such as vertebroplasty and kyphoplasty, using PMMA bone cement, face challenges including exothermic reactions that can damage bone tissue, inhibit new bone growth, and lead to complications like avascular necrosis and adjacent segment fractures.
Innovation Solution
A method and system for stabilizing vertebral bodies by creating openings in the vertebral body, inserting cannulas, forming an internal cavity, injecting bone particles under pressure to compress them against the cavity wall, and sealing the particles within the cavity to promote natural bone healing and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If PMMA bone cement is used for stabilization, then rigid support is provided, but exothermic reaction damages bone tissue and inhibits new bone growth
Solution Approach 1:
The patent extracts and removes the harmful exothermic reaction property from the stabilization material. Instead of using PMMA cement that generates heat, the invention uses bone particles that do not produce exothermic reactions, thereby eliminating tissue damage while maintaining structural support capability.
Solution Approach 2:
The patent changes the material parameter from PMMA cement to bone particles. This fundamental material substitution alters the thermal properties (eliminating exothermic reaction) while maintaining or improving the mechanical support function through the bone particles' ability to integrate with native bone tissue.
2Strength
If PMMA bone cement is used for stabilization, then rigid support is provided, but new bone growth is inhibited
Solution Approach 1:
The patent employs bone particles that enable the vertebral body to perform its own healing function. The bone particles serve as a scaffold that facilitates the body's natural bone regeneration processes, allowing new bone growth to occur around and through the particles, rather than preventing it as PMMA cement does.
Solution Approach 2:
The patent creates a composite structure where bone particles are integrated with the patient's own bone tissue. This composite of foreign bone particles and native bone allows for progressive incorporation and healing, creating a stable yet biologically active construct that promotes rather than inhibits bone growth.
3Object-affected harmful factors
If PMMA bone cement is used for stabilization, then pain is decreased, but adjacent segment fractures occur
Solution Approach 1:
The patent changes the material density parameter from the high density of PMMA cement to the more compatible density of bone particles. This reduces the density mismatch between the stabilization material and surrounding bone, thereby minimizing stress shielding and microfracturing of adjacent segments while still providing adequate pain relief through stabilization.
4Strength
If vertebroplasty or kyphoplasty is performed, then compression fracture is treated, but cord compression from cement extrusion occurs
Solution Approach 1:
The patent uses bone particles that can be safely contained within the vertebral body without the same extrusion risks as PMMA cement. Even if particles were to migrate, they are biocompatible and less likely to cause severe complications like cord compression compared to cement extrusion. The particles fulfill their stabilization function without the same safety concerns.
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
This approach allows for the gradual increase in bone density within the vertebral body, enabling natural healing processes to stabilize and repair fractures without the limitations and complications associated with PMMA cement, thereby maintaining vertebral height and density.
Implementation Method 1
applying pressure to the bone particles within the internal cavity of the vertebral body, thereby compressing them against a sidewall of the internal cavity
Data Source
AI summary
A method for stabilizing a vertebral body is provided. The method includes creating one or more openings into a central region of the vertebral body and dispose at least one cannula in the one or more openings. The method includes forming an internal cavity within the vertebral body through at least one of the one or more openings. The method includes injecting bone particles into the internal cavity of the vertebral body through a bone particle catheter disposed within the at least one cannula. The method includes applying pressure to the bone particles within the internal cavity of the vertebral body, thereby compressing them against a sidewall of the internal cavity. The method includes removing the at least one cannula and closing the one or more openings, thereby sealing the bone particles within the internal cavity of the vertebral body. A system for stabilizing a vertebral body is also provided.