Phosphoserine-Calcium Phosphate Adhesive for Wet Bone Bonding
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Solution Overview
Problem
Existing adhesive compositions for medical and industrial applications face challenges such as lack of adhesion to wet surfaces, limited strength, and poor injectability, particularly in environments like underwater settings.
Innovation Solution
Development of adhesive, self-setting compositions that interact between a small molecule anionic reactant and a mineral salt of a multivalent metal in an aqueous medium, specifically using compounds like tetra-calcium phosphate and phosphoserine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based self-setting calcium phosphate cements are used, then biocompatibility is improved, but adhesive strength deteriorates
Solution Approach 1:
The patent introduces phosphoserine as a molecular mediator that bridges the inorganic calcium phosphate cement and organic substrates (bone, tissue, polymer). The phosphoserine contains both inorganic phosphate groups that bind to calcium ions in the CPC and organic amino acid groups that interact with organic materials, enabling adhesion between inorganic and organic phases while maintaining biocompatibility
Solution Approach 2:
The invention creates a composite adhesive system combining water-based calcium phosphate cement with phosphoserine molecules. This composite formulation integrates the biocompatibility of CPC with the adhesive properties of phosphoserine, achieving both biocompatibility and adhesive strength simultaneously
2Strength
If resin-based cements are used, then adhesive strength is improved, but biocompatibility deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the cement from resin-based to water-based calcium phosphate formulation, while compensating for the loss of adhesive strength through the addition of phosphoserine. This parameter change achieves both biocompatibility and adhesive functionality
3Strength
If adhesive compositions are formulated for high strength, then adhesive strength is improved, but injectability deteriorates
Solution Approach 1:
The patent creates a dynamic formulation where the adhesive composition remains in an injectable slurry state during application, then transitions to a hardened adhesive state after setting. The phosphoserine-CPC system allows the material to flow when liquid and provide strong adhesion when cured, achieving both injectability and high strength through state transition
4Stability of the object's composition
If mechanical fastening devices are used, then structural stability is improved, but applicability to wet surfaces deteriorates
Solution Approach 1:
The patent replaces mechanical fastening systems with a chemical adhesive system based on phosphoserine-CPC. The adhesive uses chemical bonding mechanisms (phosphate-calcium interactions and organic substrate binding) instead of mechanical interlocking, enabling effective bonding to wet surfaces where mechanical fasteners would fail
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 compositions exhibit robust adhesive behavior, maintaining a tacky state for up to 12 minutes and achieving high adhesive strength upon curing, effectively bonding to bone and other materials, including titanium, even in wet conditions.
Implementation Method 1
adhesive, self-setting compositions, which feature an interaction between a small molecule anionic reactant and a mineral salt of a multivalent metal in an aqueous medium
Data Source
AI summary
Provided herein are compositions and their methods of use to adhere (e.g., in wet and dry environments) a variety of materials together.