Composite Bone Grafts with Allograft Osteoinduction
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Solution Overview
Problem
Current bone graft implants fail to provide reliable and consistent results due to issues such as rapid degradation, inadequate mechanical integrity, and improper porosity, leading to suboptimal bone tissue regeneration and clinical outcomes.
Innovation Solution
The development of porous, composite bone graft implants combining bioactive glass and allograft materials with tailored resorption capacities and pore size distributions, optimized for vascularization, cell attachment, and customized anatomical fit, providing structural and functional synergy for sustained tissue growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bone graft implants are designed with high porosity to allow vascularization and cell infiltration, then bone tissue regeneration is improved, but mechanical integrity and structural support deteriorate
Solution Approach 1:
The patent employs composite bone graft materials combining multiple components (e.g., calcium phosphates, collagen, growth factors) to achieve both high porosity for tissue regeneration and adequate mechanical strength. The composite structure allows different materials to contribute their strengths: porous frameworks enable cell infiltration while maintaining structural support.
2Productivity
If bone graft implants are designed to degrade rapidly to make way for new tissue, then space for bone growth is provided, but structural support and mechanical integrity deteriorate before tissue maturation
Solution Approach 1:
The patent designs bone graft implants with dynamic, staged degradation profiles where the material degrades at controlled rates matching tissue formation. The implant maintains structural integrity during early loading phases then gradually degrades as new bone forms, providing temporal coordination between structural support and tissue regeneration.
Solution Approach 2:
The patent incorporates preliminary structural design where the implant provides adequate mechanical support before degradation begins. The scaffold is pre-engineered with optimal pore structures and material properties to support tissue formation initially, then progressively degrades as the new tissue matures and takes over load-bearing functions.
3Reliability
If allograft materials are incorporated to provide osteoinduction and biological activity, then bone formation is enhanced, but risk of disease transmission and immunogenicity increases
Solution Approach 1:
The patent extracts only the beneficial osteoinductive components from allograft materials while eliminating harmful elements. Techniques such as demineralization extract growth factors and osteoinductive proteins from bone matrix, removing potential pathogens while retaining biological activity. The extracted components are then incorporated into synthetic scaffolds.
Solution Approach 2:
The patent uses synthetic bone graft materials as intermediaries that provide osteoinduction without direct allograft contact. Growth factors and osteoinductive proteins are isolated from allografts and incorporated into biocompatible synthetic carriers, mediating the biological effect while eliminating disease transmission risks associated with direct allograft use.
4Manufacturing precision
If custom anatomical shapes are created to fit individual patients, then surgical fit and precision are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent uses parameter-based customization where standard implant designs are modified by adjusting geometric parameters to match patient anatomy. Digital modeling allows precise control of pore size, shape, and distribution parameters while maintaining standardized manufacturing processes, achieving custom fit without proportionally increasing manufacturing complexity.
Data Source
AI summary
Synthetic, bioactive ultra-porous bone graft materials having an engineered porosity, and implants formed from such materials are provided. In particular, these implants comprise bioactive glass and incorporate allograft material for osteoinduction. The implants are suitable for bone tissue regeneration and/or repair.