Moldable Bone Graft Composition for Infection Control and Resorption
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Solution Overview
Problem
Current bone grafting procedures face challenges with autogenous bone, including increased pain, infection risk, and poor resorbability, bioactivity, and moldability of synthetic materials, which limit effective bone proliferation and remodeling.
Innovation Solution
A moldable bone graft composition combining bioactive glass, biphasic calcium phosphate particles, and a resorbable polymer carrier, optimized for bioactivity, antimicrobial properties, and controlled resorption, facilitating surgeon handling and long-term bone healing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synthetic bone graft material is used, then the risk of infection and disease transmission is reduced, but the resorbability profile is poor leading to low proliferation and remodeling of new bone
Solution Approach 1:
The patent modifies the chemical composition parameters of synthetic bone graft material by incorporating specific ratios of hydroxyapatite (60-80 wt%), beta-tricalcium phosphate (10-30 wt%), and bioactive glass (5-20 wt%). This compositional parameter change enables the material to achieve both low infection risk and improved resorbability, as the calcium phosphate components are naturally resorbable while maintaining synthetic safety profiles.
Solution Approach 2:
The patent creates a composite bone graft material combining multiple synthetic components (hydroxyapatite, beta-tricalcium phosphate, and bioactive glass) into a unified formulation. This composite approach allows the material to simultaneously exhibit low immunogenicity (reducing infection risk) and controlled resorbability, as each component contributes different properties that complement each other in the composite structure.
2Quantity of substance
If synthetic bone graft material is used, then the availability of graft material is improved, but the bioactivity is low resulting in poor osteogenic effects
Solution Approach 1:
The patent adjusts the chemical composition parameters to include bioactive glass (5-20 wt%) in addition to calcium phosphate components. This parameter change enhances bioactivity by promoting osteoblast differentiation and bone formation, while maintaining the availability advantage of synthetic materials through controlled formulation ratios.
Solution Approach 2:
The patent develops a composite material system combining hydroxyapatite, beta-tricalcium phosphate, and bioactive glass components. This composite structure provides both adequate availability (as a synthetic, readily manufacturable material) and enhanced bioactivity, as the multiple components work synergistically to promote osteogenic effects.
3Ease of manufacture
If current synthetic bone graft material is used, then the cost is reduced, but the ability to mold or form the material into a desirable shape during intraoperative surgical procedures is lost
Solution Approach 1:
The patent formulates the synthetic bone graft material with specific physical properties that enable it to be molded and shaped during surgical procedures. The material's composition and physical state allow surgeons to adaptively shape it to fit complex defect geometries, providing ease of operation while maintaining the cost advantages of synthetic materials.
4Quantity of substance
If current synthetic bone graft material is used, then the availability is improved, but the ability to maintain the desired placement at the defect site is lost
Solution Approach 1:
The patent modifies the physical and chemical parameters of the synthetic bone graft material to enhance placement stability. The specific composition ratios and physical properties enable the material to maintain its position at the defect site while remaining available as a synthetic graft option.
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 composition promotes immediate apatite layer formation, stimulates bone cell proliferation, and achieves high spine fusion rates, providing a stable scaffold for sustained osteoconductivity and remodeling, reducing surgical complications and improving bone defect repair outcomes.
Implementation Method 1
bioactive, to initiate immediate apatite layer formation
Data Source
AI summary
The present disclosure relates to compositions useful in synthetic bone graft applications. Particularly, the disclosure teaches moldable bone graft compositions, methods of making the compositions, and methods of utilizing the same.