Cellulose Derivative Hydrogels for Soft Tissue Augmentation
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Solution Overview
Problem
Current biomaterials for soft tissue reconstruction and augmentation, such as poly(methylmethacrylate) and poly(tetrafluoroethylene), often lead to adverse clinical outcomes like hematomas, scarring, and resorption, necessitating the development of safer, more effective materials with tunable physico-chemical properties for tissue repair and augmentation.
Innovation Solution
Development of cellulose derivative polymers, specifically methacrylate-substituted cellulose derivatives, which are photocrosslinkable or redox-crosslinkable, allowing for the formation of hydrogels with customizable properties suitable for soft tissue reconstruction, repair, or augmentation by covalently substituting unprotected groups on the cellulose backbone with photocrosslinkable or redox-crosslinkable groups and crosslinking in the presence of a photoinitiator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If permanent filler materials such as poly(methylmethacrylate), polymeric silicone, poly(tetrafluoroethylene) and polyethylene are used, then the duration of effect is permanent, but adverse clinical outcomes including recurrent hematomas, edema, hypertrophic scarring, nodule formation and resorption occur
Solution Approach 1:
The patent changes the chemical composition parameters of the filler material from synthetic polymers to cellulose derivatives with specific degrees of substitution and molecular weights. This parameter change maintains the duration of effect while eliminating the harmful adverse reactions associated with permanent synthetic fillers.
Solution Approach 2:
The patent creates composite hydrogel materials by combining cellulose derivatives with crosslinking agents and optional bioactive components. This composite approach provides both the permanence needed for long-term effect and the biocompatibility required to avoid adverse clinical outcomes.
2Adaptability or versatility
If cellulose derivative polymers are substituted with photocrosslinkable or redox-crosslinkable groups, then tunable physico-chemical properties are achieved, but the complexity of the manufacturing process increases
Solution Approach 1:
The patent applies preliminary action by pre-substituting the cellulose derivative polymers with crosslinkable groups during manufacturing. This allows the base material to be prepared with built-in functionality, simplifying the final hydrogel formation step to only require adding the initiator and crosslinking agent.
Solution Approach 2:
The patent uses crosslinking agents as intermediaries that bridge the cellulose derivative polymer chains. These intermediaries enable the formation of the hydrogel network without requiring complex direct bonding mechanisms, simplifying the overall manufacturing process.
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 resulting hydrogels demonstrate enhanced biocompatibility, mechanical stability, and minimal inflammatory response, making them suitable for long-term use in soft tissue engineering applications with tunable properties that support cell growth and maintain structural integrity.
Implementation Method 1
in the presence of a photoinitiator, crosslinking the polymer; and forming a hydrogel
Implementation Method 2
covalently bound photocrosslinkable groups, or redox-crosslinkable groups
Data Source
AI summary
This invention relates to biomaterial compositions, methods and kits for producing hydrogels with tunable physico-chemical properties. Specifically, the invention relates to producing cellulosic hydrogels having optimized physico-chemical properties enabling support of cell growth or as replacement or filler for tissue repair, reconstruction or augmentation.