Injectable Polycaprolactone Foam for Bone Defect Fusion
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Solution Overview
Problem
Current bone adhesives face challenges with poor biocompatibility, limited biodegradability, and inadequate mechanical integrity for bone tissue applications, with synthetic adhesives lacking in biocompatibility and biologically inspired materials failing to provide sufficient mechanical stability.
Innovation Solution
Development of an injectable expandable composition comprising polycaprolactone particles coated with polydopamine and bound to polymethacrylic acid, which enhances bioactive and adhesive properties, allowing for in-situ foaming and bone defect treatment with improved mechanical and biological properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If synthetic adhesives like poly(methyl methacrylate) bone cement are used, then adhesion strength is improved, but biocompatibility and biodegradability deteriorate
Solution Approach 1:
The invention uses a composite material system combining polycaprolactone (biodegradable polymer) with polydopamine (adhesive coating) and polymethacrylic acid (plasticizer). This composite approach allows the material to exhibit both biocompatibility from the polycaprolactone matrix and adhesion strength from the polydopamine coating, resolving the contradiction between strength and biocompatibility
Solution Approach 2:
The invention changes the chemical composition parameters by using polycaprolactone instead of poly(methyl methacrylate) as the base polymer, and incorporates polydopamine coating to enhance adhesion. This parameter change transforms the material from synthetic and non-biodegradable to biodegradable while maintaining adhesive properties through the polydopamine layer
2Object-affected harmful factors
If biologically inspired materials like fibrin glue are used, then biocompatibility is improved, but mechanical integrity deteriorates
Solution Approach 1:
The invention creates a composite where polycaprolactone provides the mechanical integrity framework while polydopamine provides adhesive bonding capability. The resulting material achieves both biocompatibility (from natural polymer sources) and sufficient mechanical strength for bone tissue applications, overcoming the limitation of biologically inspired materials
3Strength
If polydopamine adhesive is bound to polycaprolactone filler, then adhesive properties are improved, but manufacturing complexity increases
Solution Approach 1:
The polydopamine adhesive is pre-bound to the polycaprolactone filler particles before final formulation. This preliminary action of coating the filler particles simplifies the manufacturing process by pre-establishing the adhesive framework, avoiding the need for complex post-processing steps to achieve adhesive properties
4Adaptability or versatility
If the composition is designed for in-situ foaming, then adaptability to bone defects is improved, but device complexity increases
Solution Approach 1:
The composition is designed to undergo phase transition from a dense injectable state to an expanded foamed state in-situ. This phase transition allows the material to adapt to irregular bone defect geometries by expanding to fill the void space, providing high adaptability while using a relatively simple injection device
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 achieves enhanced adhesion strength, bioactivity, and biocompatibility, enabling effective bone regeneration and fusion with morphological properties similar to trabecular bone, suitable for diverse trauma and pathology-driven needs in bone surgery.
Implementation Method 1
a polydopamine adhesive bound to said filler
Implementation Method 2
a polymethacrylic acid plasticizer bound to said polydopamine adhesive
Implementation Method 3
in-situ foaming of polymers for bone or tissue defects, namely filling and/or fusion
Data Source
AI summary
The present disclosure relates to injectable and expandable compositions, devices, kits and methods for use in an approach for the in-situ foaming of polymers for bone or tissue defects, namely to fill and/or fuse a tissue defect. The present disclosure relates to compositions, devices, kits and methods for use in an approach for the in-situ foaming of polymers for bone or tissue defects, namely for bone tissue defect filling/fusion. The design of extendable and expandable compositions for bone fusion is one of the most challenging fields in the intersection of polymer and biomedical engineering. An aspect of the present disclosure relates to an injectable expandable composition for use in medicine, veterinary or cosmetic, comprising a polycaprolactone particle filler; a polydopamine adhesive bound to said filler; a polymethacrylic acid plasticizer bound to said polydopamine adhesive.