Injectable Bone Composite for Minimally Invasive Fracture Stabilization
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Solution Overview
Problem
Current methods for treating bone fractures and fortifying bones are inadequate due to limitations in external stabilizers, internal stabilizers, and bone cements, which interfere with daily activities, require invasive procedures, and lack suitable tensile strength, leading to catastrophic failure and inconvenience to patients.
Innovation Solution
A novel composite implant comprising a containment bag, reinforcing elements, and an injectable matrix material is used, allowing for minimally invasive installation and customization of properties such as length and strength, providing structural reinforcement and fortification with minimal patient inconvenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If external stabilizers (casts, braces) are used to treat bone fractures, then the bone is supported during healing, but the patient's daily activities are interfered with and soft tissue atrophies due to disuse
Solution Approach 1:
The invention extracts the stabilization function from external devices and relocates it internally by injecting composite material directly into the bone marrow cavity. This eliminates the need for external casts and braces, allowing patients to maintain normal mobility while the bone heals internally supported by the injected composite material.
Solution Approach 2:
The composite material acts as an intermediary substance that is injected into the bone marrow cavity to provide internal support. This mediator transfers load from the fractured bone to the surrounding healthy bone through the composite material, eliminating the need for external stabilizers and preventing soft tissue atrophy.
2Strength
If internal stabilizers (screws, plates, nails) are used to treat bone fractures, then the fracture is stabilized effectively, but invasive surgical procedures are required and a second surgery is needed for removal
Solution Approach 1:
The composite material serves as a temporary, biodegradable stabilization agent that is injected once and then gradually absorbed by the body as the bone heals. This eliminates the need for permanent metal implants that require removal surgery, reducing overall surgical complexity and patient trauma.
Solution Approach 2:
The invention changes the physical state of the stabilization material from solid metal implants requiring surgical insertion to an injectable composite that transitions from liquid to solid form in situ. This parameter change simplifies the surgical procedure from invasive implantation to minimally invasive injection.
3Strength
If bone cements (ceramic, polymer, calcium salt) are injected into bone to stabilize fractures, then the bone is fortified, but the material is extremely brittle and cannot withstand tensile loading
Solution Approach 1:
The invention uses composite materials combining organic polymer matrices with inorganic reinforcing particles (such as hydroxyapatite or other bone-like minerals). This composite structure provides both the compressive strength of ceramic materials and the tensile flexibility of polymer materials, eliminating the brittleness problem while maintaining bone fortification capabilities.
Solution Approach 2:
The invention changes the material composition from pure ceramic or polymer to a composite formulation with optimized ratios of organic and inorganic components. This parameter change transforms the mechanical properties from brittle to tough, enabling the material to withstand both compressive and tensile loads similar to natural bone.
4Strength
If conventional bone treatment methods are used, then some level of support is provided, but the materials lack customization options for length and strength properties
Solution Approach 1:
The injectable composite material allows for local customization of bone reinforcement properties by adjusting the formulation, volume, and distribution of the injected material. Different regions of the bone can receive different amounts or concentrations of the composite, enabling tailored treatment for specific fracture patterns and patient needs.
Solution Approach 2:
The invention enables parameter customization by adjusting the composition, viscosity, setting time, and mechanical properties of the injectable composite material. These parameters can be modified to match specific patient requirements, fracture characteristics, and desired strength profiles, providing versatile adaptability.
Data Source
AI summary
A composite comprising: a barrier, said barrier being configured to selectively pass water, and said barrier being degradable in the presence of water; a matrix material for disposition within said barrier, wherein said matrix material has a flowable state and a set state, and wherein said matrix material is degradable in the presence of water; and at least one reinforcing element for disposition within said barrier and integration with said matrix material, wherein said at least one reinforcing element is degradable in the presence of water, and further wherein, upon the degradation of said at least one reinforcing element in the presence of water, provides an agent for modulating the degradation rate of said matrix material in the presence of water.