Biologic Artificial Bone Composite Using Synthetic Polymer Fibers
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Solution Overview
Problem
Current bone replacement and fixation methods, such as metal alloys and ceramics, lack the mechanical and biologic properties of natural bone, leading to complications like implant loosening, discomfort, and rejection, and there is a need for a structural artificial bone that can replace or supplement host bones in conditions like fractures and tumors.
Innovation Solution
A biologic artificial bone composite is developed using synthetic polymer fibers with mechanical properties similar to type I collagen, impregnated with a biocompatible liquid to harden and stiffen, and incorporating vascular channels and ceramics, along with angiogenic factors, to mimic the structure and function of natural bone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal alloys are used for fixation devices, then mechanical strength is improved, but biocompatibility and biodegradability deteriorate
Solution Approach 1:
The patent applies composite materials by combining synthetic polymer fibers (providing mechanical strength similar to collagen) with ceramics (providing bone-like properties) and biological factors (BMPs, angiogenic factors). This composite structure achieves both the mechanical strength of metal and the biocompatibility of natural bone, resolving the contradiction between strength and biocompatibility.
Solution Approach 2:
The patent changes the material parameters from permanent metal alloys to biodegradable polymers with controlled degradation rates. The synthetic polymer fibers are designed to degrade over time as natural bone forms, transitioning the mechanical support from artificial to biological, thus improving biocompatibility while maintaining strength during the healing process.
2Reliability
If ceramics are used to fill bone defects, then biocompatibility is improved, but mechanical strength and structural capability deteriorate
Solution Approach 1:
The patent creates a composite where ceramics are embedded within a synthetic polymer fiber matrix. The polymer provides the mechanical strength and structural framework, while the ceramics provide biocompatibility and osteoconductivity. This composite structure overcomes the weakness of pure ceramics by reinforcing them with the polymer framework.
Solution Approach 2:
The patent applies local quality by distributing ceramics selectively within the polymer matrix in regions where bone formation is needed, while the polymer fiber network provides continuous mechanical support throughout the structure. This localized placement allows each material to contribute its superior properties where most needed.
3Reliability
If allograft bone is used to replace large defects, then biologic properties are improved, but risk of rejection and infection deteriorates
Solution Approach 1:
The patent copies the structure and function of natural bone using synthetic polymers designed to mimic collagen fibers, rather than using actual donor bone tissue. This synthetic replication provides the same biologic properties (osteoconductivity, osteoinductivity) without the immunological risks of allografts, as the material is not recognized as foreign tissue.
Solution Approach 2:
The synthetic polymer-based artificial bone is designed as a temporary structural support that degrades over time as natural bone forms, replacing the need for permanent implants or long-term allografts. This disposable approach eliminates the need for donor sites and reduces long-term complications.
4Reliability
If a composite structure is created to mimic natural bone, then biologic properties are improved, but device complexity deteriorates
Solution Approach 1:
The patent segments the complex task of creating bone-like material into distinct functional components: synthetic polymer fibers for mechanical strength and collagen mimicry, ceramics for mineral content and osteoconductivity, and biological factors for osteoinduction. Each component can be optimized and manufactured separately, then combined into the final composite structure.
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 artificial bone composite provides mechanical strength and biologic compatibility, facilitating bone in-growth, vascularization, and neo-formation, effectively replacing or supplementing host bones with properties comparable to natural bone, reducing complications associated with existing methods.
Implementation Method 1
a biocompatible liquid substance impregnated in the fiber material. The biocompatible liquid substance serves to harden and stiffen the fiber material
Implementation Method 2
Vascular channels are formed in the artificial bone composite to facilitate in-growth of vessels and bone forming cells
Implementation Method 3
A bone substitute is impregnated in the hardened and stiffened fiber material to form an artificial bone composite
Data Source
AI summary
A biologic artificial bone includes an artificial fiber material formed from a synthetic polymer with mechanical properties similar to type I collagen. A biocompatible liquid substance is impregnated in the fiber material that hardens and stiffens the fiber material. A bone substitute is impregnated in the hardened and stiffened fiber material forming an artificial bone composite. Vascular channels are formed in the artificial bone composite to facilitate in-growth of vessels and bone forming cells. The construction and methods achieve an artificial composite structure that is similar to natural bone with comparable properties.