PPF-VPA Biopolymer Scaffold for Tissue Regeneration
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Solution Overview
Problem
Current biodegradable and biocompatible tissue scaffolds for cartilage and bone tissue regeneration face challenges in synchronizing biodegradation rates with tissue healing, inducing undesirable immune responses due to accumulation of degradation products, and struggling to buffer pH changes, which hampers effective tissue regeneration.
Innovation Solution
A method involving the synthesis of polypropylene fumarate (PPF) pre-polymer mixed with vinyl phosphonic acid (VPA) or vinyl phosphonic acid ester (VPES) and cured with a radical initiator to produce porous or non-porous biopolymers with enhanced biodegradability and biocompatibility, allowing for controlled biodegradation and improved tissue regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional biodegradable polymers (PLLA, PCL) are used for tissue scaffolds, then structural stability is provided, but biodegradation rate cannot be synchronized with tissue healing rate
Solution Approach 1:
The patent changes the chemical composition parameters of the polymer by incorporating vinyl phosphonic acid or vinyl phosphonic acid ester comonomers into the PPF backbone. This compositional modification alters the biodegradation rate while maintaining structural stability, enabling synchronization with tissue healing processes.
Solution Approach 2:
The patent creates a composite polymer system by combining polypropylene fumarate with vinyl phosphonic acid or vinyl phosphonic acid ester comonomers. This composite approach integrates the structural stability of PPF with the enhanced biodegradability and pH-buffering capabilities of phosphonic acid groups.
2Productivity
If biodegradable polymers are used, then tissue regeneration is supported, but accumulation of biodegradation products causes undesirable immune responses
Solution Approach 1:
The patent converts the potentially harmful accumulation of biodegradation products into a beneficial outcome by incorporating phosphonic acid groups that buffer pH changes. The biodegradation products no longer cause harmful immune responses but instead contribute to maintaining a favorable pH environment for tissue regeneration.
Solution Approach 2:
The phosphonic acid groups act as intermediaries between the biodegradation process and the biological environment. They mediate the interaction by buffering pH changes caused by biodegradation, preventing direct harmful effects on immune cells while allowing controlled tissue regeneration.
3Stability of the object's composition
If conventional polymers are used, then scaffold structure is maintained, but ability to buffer pH changes is insufficient
Solution Approach 1:
The patent imparts multi-functionality to the polymer scaffold by incorporating phosphonic acid groups that simultaneously provide pH buffering capacity while maintaining structural stability. The same polymer structure performs both structural support and chemical buffering functions.
Solution Approach 2:
The patent modifies the chemical parameters of the polymer by introducing phosphonic acid groups, which change the pH-buffering characteristics of the material while preserving the structural integrity provided by the PPF backbone.
4Reliability
If conventional tissue scaffolds are used, then basic support function is provided, but induction for tissue regeneration is insufficient
Solution Approach 1:
The phosphonic acid groups in the polymer act as intermediaries that enhance the interaction between the scaffold and regenerating tissues. These groups create a more favorable chemical environment that actively induces tissue regeneration while the PPF backbone provides reliable structural support.
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 method results in higher biodegradability and biocompatibility, facilitating synchronized biodegradation with tissue healing, reduced immune responses, and enhanced cell growth, as evidenced by higher cell attachment and proliferation rates compared to existing scaffolds.
Implementation Method 1
curing the mixture by heating it in the presence of a radical initiator
Implementation Method 2
A porous form is provided to these polymers
Data Source
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AI summary
The present invention relates to a production method of a biodegradable and biocompatible tissue scaffold, which is designed to support cell proliferation by being implanted to the tissue during tissue regeneration after defect of a cartilage and/or bone tissue, and which comprises the steps of synthesizing polypropylene fumarate (PPF) pre-polymer (101), mixing PPF with vinyl phosphonic acid (VPA) or vinyl phosphonic acid ester (VPES) (102), curing the mixture by heating it in the presence of a radical initiator (103), obtaining the porous or nonporous biopolymer that will be used as tissue scaffold (104).