TMC Polymeric Composite for Bone Regeneration
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Solution Overview
Problem
Current materials for bone reconstruction, such as non-resorbable and biodegradable implants, fail to regenerate bone effectively and integrate with surrounding bone structures, leading to complications like fibrous capsule formation and insufficient mechanical strength.
Innovation Solution
A biodegradable polymeric composite made from 1,3-trimethylene carbonate (TMC) polymers with embedded osteogenic and osteoinductive agents like calcium phosphates, which are crosslinked to provide mechanical strength and promote bone regeneration while integrating with host bone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-resorbable materials like titanium, polytetrafluoroethylene, polyethylene and silicone rubbers are used for bone reconstruction, then the life-long risk of complications is avoided, but the materials are not absorbed by the body resulting in a life-long risk of complications
Solution Approach 1:
The patent changes the degradation parameters of polymeric materials by selecting specific polymers (polylactides, polyglycolides, and their copolymers) with controlled degradation rates. By adjusting the polymer composition, molecular weight, and crystallinity, the material maintains mechanical strength during the bone healing period and then degrades completely, eliminating permanent foreign bodies while providing temporary structural support.
Solution Approach 2:
The patent creates composite materials combining biodegradable polymers with ceramic phases (calcium phosphates, hydroxyapatite). This composite structure provides both the mechanical strength needed for immediate post-operative stability and osteoinductive properties that promote bone formation, while the entire composite degrades over time without causing long-term complications.
2Reliability
If biodegradable polymeric matrices of polylactides and polyglycolides are used, then the life-long risk of complications is avoided, but their degradation products have negative effects on surrounding tissues and on bone and bone formation
Solution Approach 1:
The patent carefully controls the degradation parameters by selecting polymers with appropriate molecular weights, lactide/glycolide ratios, and crystallinity levels. This control ensures that degradation occurs at a rate that matches bone formation, preventing accumulation of harmful degradation products while maintaining structural integrity during the healing process.
Solution Approach 2:
The patent introduces ceramic phases (calcium phosphates, hydroxyapatite) as intermediaries that buffer the degradation process. These ceramics provide a stable framework that slows polymer degradation and releases calcium ions that neutralize acidic degradation products, protecting surrounding tissues and promoting bone formation rather than inhibition.
3Reliability
If biodegradable polymeric matrices of polylactides and polyglycolides are used, then the life-long risk of complications is avoided, but excess development of fibrous capsules or scar tissue remains after degradation
Solution Approach 1:
The patent combines biodegradable polymers with osteoinductive ceramics to create composites that actively promote bone formation. The ceramic phase provides osteoinductive signals that stimulate osteoblast activity, directing the body's response toward bone regeneration rather than fibrous encapsulation, thereby eliminating the harmful side effect of scar tissue formation.
Solution Approach 2:
The patent designs the material to self-regulate the healing process through controlled degradation. As the polymer degrades, it releases degradation products that trigger inflammatory responses, but the embedded ceramics modulate this response to promote organized bone formation rather than chaotic fibrous tissue growth, allowing the system to self-correct and achieve optimal healing outcomes.
4Object-generated harmful factors
If ceramic phosphates like calcium phosphates are used, then bone forming properties are achieved, but the brittle structure provides insufficient mechanical strength
Solution Approach 1:
The patent creates composite materials where biodegradable polymers serve as the continuous matrix providing ductility and toughness, while ceramic phases (calcium phosphates, hydroxyapatite) are dispersed as reinforcement providing osteoinductive properties and compressive strength. This composite architecture combines the advantages of both materials, achieving mechanical strength sufficient for bone reconstruction while maintaining bone-forming capabilities.
Solution Approach 2:
The patent optimizes the local distribution and morphology of ceramic phases within the polymeric matrix. By controlling particle size, shape, and distribution, the composite achieves maximum mechanical reinforcement at critical load-bearing regions while maintaining high surface area for osteoinductive activity, thereby simultaneously improving strength and bone formation properties.
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 composite allows for complete disintegration, facilitating bone formation and integration with surrounding bone, reducing complications like fibrous capsule formation and enhancing mechanical strength for bone reconstruction.
Implementation Method 1
crosslinking the product obtained, thereby providing a composite with bone forming properties
Implementation Method 2
adding to said liquid, or liquefied, polymeric composition one or more agents with osteogenic and osteoinductive properties thereby providing a dispersion of said agents in said liquid or liquefied polymeric composition
Data Source
AI summary
The present invention relates to methods for providing polymeric composites with bone forming, such as with osteogenic and/or osteoinductive and/or osteoconductive, properties. The present invention further relates to polymeric composites provided by the present method and the use of thereof for bone implants, or grafts, specifically the use thereof for orbital floor reconstruction. Specifically, the present invention relates to methods for providing a composite with bone forming properties, the method comprises the steps of: a) providing a liquid, or liquefied, polymeric composition of homopolymers or copolymers of 1,3-trimethylene carbonate (TMC); b) adding to said liquid, or liquefied, polymeric composition one or more agents with osteogenic and/or osteoinductive and/or osteoconductive properties thereby providing a dispersion of said agents in said liquid or liquefied polymeric composition; and c) crosslinking the product obtained, thereby providing a composite with bone forming properties.