Growth-Factor Augmented Bone Graft for Faster Osteoinduction
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Solution Overview
Problem
Existing osteogenic compositions lack enhanced osteoinductive properties and efficacy in bone regeneration, necessitating innovative approaches to improve the effectiveness of biomaterials used in bone repair and regeneration.
Innovation Solution
The development of osteogenic compositions comprising growth-factor augmented cortical bone and cancellous bone, where the cortical bone is demineralized and amplified with growth factors, and the cancellous bone retains viable endogenous osteogenic cells, which are combined to form a cryopreserved or lyopreserved osteogenic composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If demineralized bone matrix is used to provide osteoconductive and osteoinductive properties, then the biomaterial can support bone growth, but the osteoinductive properties are insufficient for rapid bone regeneration
Solution Approach 1:
The patent combines demineralized bone matrix (DBM) with growth factors and viable osteogenic cells into a single composite osteogenic composition. This merging of multiple bioactive components (DBM for osteoconduction, growth factors for osteoinduction, and viable cells for immediate osteogenic activity) creates a synergistic effect that simultaneously improves reliability of bone growth support and accelerates the productivity of bone regeneration, resolving the contradiction between sufficient osteoinductive properties and rapid bone formation
Solution Approach 2:
The invention creates a composite osteogenic material consisting of DBM particles, growth factors (such as BMPs, TGF-β, PDGF), and viable osteogenic cells embedded in a carrier matrix. This composite structure integrates multiple functional components that work together: DBM provides structural framework and osteoconduction, growth factors stimulate osteogenesis, and viable cells provide immediate bone-forming capability, thereby enhancing both the reliability and speed of bone regeneration
2Quantity of substance
If growth factors are extracted from demineralized bone using acidic solutions, then growth factors can be obtained for amplification, but the process requires precise control of pH and temperature parameters
Solution Approach 1:
The patent performs preliminary demineralization of bone tissue before growth factor extraction, removing mineral components to facilitate subsequent acid extraction of growth factors. This preliminary action simplifies the extraction process by pre-processing the bone matrix, making growth factors more accessible and reducing the complexity of parameter control during the actual extraction phase, thereby obtaining higher growth factor concentrations with improved manufacturing precision
Solution Approach 2:
The invention uses acidic solutions (such as HCl or citric acid) as intermediary agents to extract growth factors from demineralized bone. The acid acts as a mediator that selectively solubilizes growth factors while leaving other bone components intact. By controlling the acid concentration, pH, and extraction time, the process achieves high growth factor recovery without requiring extreme parameter control, resolving the contradiction between quantity obtained and manufacturing precision required
3Quantity of substance
If cancellous bone is subjected to loosening agents to release osteogenic cells, then more cells can be obtained, but the cells may lose their adherence to the bone matrix
Solution Approach 1:
The patent applies a partial action approach by using mild mechanical disruption or limited enzymatic treatment of cancellous bone to release a portion of osteogenic cells while maintaining enough matrix integrity to preserve cell adherence. Instead of completely dissociating the tissue, the process extracts sufficient viable cells for therapeutic use while leaving adherent cells attached to the bone matrix, thereby obtaining adequate cell numbers without compromising cell-bone stability
Solution Approach 2:
The invention creates local quality differentiation within the osteogenic composition by having both detached osteogenic cells (available for migration and proliferation) and adherent osteogenic cells (maintained on bone matrix fragments for structural support and localized bone formation). This spatial and functional differentiation allows the composition to contain cells in different states, satisfying both the need for sufficient cell quantity and the need for stable cell-bone associations
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 enhanced osteogenic composition demonstrates improved osteoinductive properties, accelerating bone growth and repair by leveraging the synergistic effects of growth factors and viable osteogenic cells, thereby enhancing the efficacy of bone regeneration.
Implementation Method 1
the growth factors are obtained from demineralized bone that has been soaked in an acidic solution to extract the growth factors
Implementation Method 2
the osteogenic composition may be cryopreserved
Implementation Method 3
the osteogenic composition may be lyopreserved
Data Source
AI summary
An osteogenic composition comprises growth-factor augmented cortical bone and cancellous bone having viable endogenous osteogenic cells that remain adherent to the cancellous bone. The growth-factor augmented cortical bone comprises demineralized cortical bone amplified with growth factors derived from a demineralized bone, and the cancellous bone not having been subjected to a loosening agent. The osteogenic composition is cryopreserved or lyopreserved. A method for preparing an enhanced graft composition with improved osteoinductive properties includes processing demineralized cortical bone; solubilizing growth factors from demineralized bone; and mixing the demineralized cortical bone with the solubilized growth factors.