Marine Hydrogel Biomatrix for Bone Regeneration
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Solution Overview
Problem
Current surgical methods for restoring bone and cartilage function are limited by the use of synthetic materials that cause stress-shielding and fatigue failure, and autologous bone grafting, which is painful and risky, while also failing to promote effective self-repair of cartilage defects due to the lack of osteogenic differentiation and mechanical stability in existing scaffolds.
Innovation Solution
A hydrogel biomatrix comprising a marine organism skeletal derivative, such as coral or its derivatives, with a specific fluid uptake capacity of at least 75%, optionally seeded with precursor cells, is used for tissue engineering and regeneration, providing a biocompatible matrix that supports cell adhesion, proliferation, and differentiation, and enhances vascularization and tissue integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If synthetic materials such as metals and calcium salts are used for bone restoration, then mechanical strength is improved, but stress-shielding to surrounding bone and fatigue failure of implant occur
Solution Approach 1:
The patent changes the material parameters from rigid synthetic materials to hydrogel-based biomaterials with tunable mechanical properties. The hydrogel composition and crosslinking density can be adjusted to match the mechanical properties of native bone, eliminating stress-shielding while maintaining sufficient strength. This is achieved by modifying the polymer network structure and composition ratios in the hydrogel scaffold.
Solution Approach 2:
The patent employs composite hydrogel materials combining multiple polymers (e.g., gelatin, alginate, chitosan) with bioactive molecules and growth factors. This composite approach creates a material that simultaneously provides mechanical support and promotes bone regeneration, resolving the contradiction between strength and biological compatibility that causes fatigue failure.
2Reliability
If autologous bone grafting is performed, then bone restoration is achieved, but pain, infection risk, hemorrhage, and loss of bone function occur
Solution Approach 1:
The patent creates a self-assembling hydrogel scaffold that automatically provides the structural and biochemical environment needed for bone regeneration. The scaffold contains embedded growth factors and signaling molecules that actively guide bone marrow stem cells to proliferate and differentiate, eliminating the need for painful autologous bone harvesting while achieving equivalent or superior regeneration outcomes.
Solution Approach 2:
The hydrogel scaffold acts as an intermediary carrier that delivers bioactive molecules and structural support to the injury site without requiring additional bone tissue. This mediator approach replaces the direct bone-to-bone grafting method, avoiding the harmful effects of donor site morbidity while maintaining the regenerative effectiveness through controlled release of osteogenic factors.
3Object-affected harmful factors
If natural polymer scaffolds such as collagen and alginate are used, then cell interaction and low toxicity are improved, but mechanical stability deteriorates
Solution Approach 1:
The patent applies different properties to different regions of the hydrogel scaffold. The outer regions provide mechanical strength through crosslinked polymer networks, while the inner regions maintain high hydrophilicity and porosity for cell interaction and nutrient transport. This spatial differentiation of material properties resolves the contradiction between mechanical stability and biological compatibility.
Solution Approach 2:
The hydrogel scaffold is pre-functionalized with cell-adhesive peptides and growth factors before implantation. This preliminary biochemical preparation ensures that when cells encounter the scaffold, they immediately adhere and begin regenerative processes, compensating for the naturally lower mechanical strength of pure natural polymers through enhanced biological activity.
4Strength
If chemical modification is applied to natural polymers to obtain mechanical strength, then mechanical stability is improved, but toxicity increases
Solution Approach 1:
The patent replaces chemical crosslinking methods with physical crosslinking mechanisms such as hydrophobic interactions, hydrogen bonding, and ionic crosslinks. These physical interactions provide sufficient mechanical strength without introducing toxic chemical residues. The hydrogel network forms through non-covalent associations that are biologically compatible and reversible, eliminating the toxicity associated with traditional chemical crosslinkers.
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 hydrogel biomatrix effectively promotes bone and cartilage regeneration by enhancing cell growth, reducing inflammation, and improving the integration of implants, leading to improved mechanical strength and tissue repair in orthopedic and dental applications.
Implementation Method 1
spontaneous fluid uptake value divided by a total fluid uptake value
Implementation Method 2
hydrogel biomatrix comprising a marine organism skeletal derivative
Implementation Method 3
easy seeding of cells because of their hydrophilic interactions
Data Source
AI summary
This invention is directed to aragonite and calcite hydrogel biomatrices, optionally seeded with precursor cells and uses thereof in tissue engineering, regeneration and repair, including in inducing or enhancing bone formation, cartilage formation or a combination thereof in a subject, and kits related thereto.