Calcium Phosphate Bone Adhesive for Moist Fracture Fixation
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Solution Overview
Problem
Current metallic osteosynthesis materials for bone fixation are unsuitable for comminuted fractures, intra-articular fractures, and pediatric fractures due to interference with joint function and bone growth, and lack of adhesion in moist physiological environments, with no commercially available alternatives to metallic osteosynthesis materials.
Innovation Solution
An adhesive composition comprising tetracalcium phosphate, phosphorylated serine, and polydopamine, which forms a biocompatible and adhesive bone glue with enhanced osteoinductive properties, allowing for rapid bone fixation and integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic osteosynthesis materials are used for bone fixation, then mechanical strength and stability are improved, but adhesion in moist physiological environment deteriorates and complications associated with metallic implants occur
Solution Approach 1:
The invention uses a composite material system consisting of calcium phosphate ceramic particles embedded in a phosphorylated serine matrix, creating a bioinspired adhesive that combines the mechanical properties of ceramic with the adhesive properties of the organic polymer, enabling strong bonding in moist physiological environments
2Stability of the object's composition
If metallic osteosynthesis materials are used for bone fixation, then mechanical stability is improved, but biocompatibility and absence of complications deteriorate
Solution Approach 1:
The invention changes the material parameters from metallic to biocompatible organic-inorganic composite, specifically using phosphorylated serine and calcium phosphate ceramic which are naturally compatible with bone tissue, eliminating issues of infection, allergic reactions, and mechanical complications associated with metal implants
3Object-affected harmful factors
If calcium phosphate ceramics are used for bone fixation, then biocompatibility is improved, but adhesion to bone tissue deteriorates
Solution Approach 1:
The invention creates a composite where calcium phosphate ceramic particles provide biocompatibility and osteoconductivity while the phosphorylated serine matrix provides adhesive properties, combining both functions in a single material system that bonds strongly to bone tissue
4Strength
If metallic hardware is used for fracture fixation, then structural support is improved, but suitability for comminuted and pediatric fractures deteriorates
Solution Approach 1:
The invention changes from rigid metallic hardware to a flexible adhesive material that can adapt to irregular fracture geometries, small fragment sizes in comminuted fractures, and growing bones in pediatric patients, providing structural support through bonding rather than mechanical fixation
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 adhesive composition provides strong and biocompatible bone fixation, promoting bone growth and integration, while avoiding complications associated with metallic implants, suitable for a wide range of fracture types including comminuted and pediatric fractures.
Implementation Method 1
phosphorylated serine can be added to a phosphocalcic ceramic to obtain adhesive properties
Implementation Method 2
an adhesive composition comprising tetracalcium phosphate, phosphorylated serine and polydopamine
Data Source
Figure 1~2
Figure 3
AI summary
The present invention relates to an adhesive composition comprising a calcium phosphate ceramic selected from tetracalcium phosphate and alpha-tricalcium phosphate, phosphorylated serine, polydopamine, and an aqueous solvent. The invention also relates to a kit, to a method for producing said adhesive composition as well as to the uses thereof.