ECM-Based Bioresorbable Bone Substitute for Load-Bearing Regeneration
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Solution Overview
Problem
Current bone substitute materials and prosthetic skeletal constructs face challenges such as insufficient compressive strength, brittleness, lack of porosity, inflammatory responses, and immunogenicity, making them unsuitable for load-bearing applications and bone regeneration.
Innovation Solution
Development of an extracellular matrix (ECM) based osteoinductive, biodegradable bone substitute material comprising a composite of autogenic bone particulates and ECM derived from mammalian tissues, incorporating biologically active agents to promote osteoanagenesis and angiogenesis, and forming porous, bioresorbable skeletal constructs that facilitate bone regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If calcium phosphate ceramic materials are sintered to bear higher compressive forces, then compressive strength is improved, but brittleness increases and porosity decreases
Solution Approach 1:
The patent employs composite materials combining calcium phosphate ceramics with biodegradable polymers (such as poly-L-lactic acid, poly-D,L-lactic acid, polyglycolic acid, or their copolymers) to create a prosthetic structure that achieves both high compressive strength and controlled porosity. The polymer component provides flexibility and toughness while the ceramic provides structural support, resolving the contradiction between strength and brittleness.
Solution Approach 2:
The patent utilizes porous composite structures where the material is formed with controlled porosity (30-70% void space) to enable cellular and vascular infiltration. The porous architecture is achieved through techniques such as foam formation, sintering with pore-preserving agents, or 3D printing, allowing the material to maintain structural integrity while facilitating bone ingrowth and remodeling.
2Volume of stationary object
If unsintered calcium phosphate prosthetic structures are used to maintain porosity, then porosity is improved, but compressive strength and load bearing capacity decrease
Solution Approach 1:
The patent combines calcium phosphate ceramics with biodegradable polymers to create a composite structure where the polymer matrix provides mechanical support and toughness, enabling the maintenance of high porosity (30-70%) without sacrificing compressive strength. The composite structure allows pore formation through various techniques while maintaining load-bearing capacity.
3Ease of manufacture
If synthetic materials are used to form prosthetic skeletal constructs, then ease of manufacture is improved, but biodegradability decreases and inflammatory response increases
Solution Approach 1:
The patent utilizes biodegradable polymers with controlled degradation rates and properties, changing the material parameters to achieve both ease of manufacture and biocompatibility. The polymers are designed to degrade into non-toxic products that do not provoke inflammatory responses, while still allowing for straightforward manufacturing processes such as molding, extrusion, or 3D printing.
4Reliability
If HAp crystals are grown on metal prosthesis surface to improve biocompatibility, then biocompatibility is improved, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates crystalline hydroxyapatite (HAp) directly into the polymer matrix during the manufacturing process, creating a composite material where HAp particles or crystals are distributed throughout the polymer structure. This approach achieves improved biocompatibility and osteoconductivity without requiring separate coating steps, thereby reducing manufacturing complexity compared to surface coating methods.
Data Source
AI summary
A bioresorbable skeletal construct member formed from an osteoinductive composition comprising autogenic bone and an extracellular matrix (ECM) material, the construct member being configured to induce osteoanagenesis and angiogenesis when implanted proximate endogenous bone and tissue.