ROS-Scavenging Polymers for Controlled Oxidative Biodegradation

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Solution Overview

Problem

Existing biodegradable polymers used in medical applications face limitations such as rapid hydrolytic degradation leading to acidic byproducts, inconsistent degradation rates due to varying tissue conditions, and lack of ROS sequestration, which can cause device failure and inflammation.

Innovation Solution

Development of oxidatively degradable polymers incorporating tertiary amines in the backbone, which scavenge reactive oxygen species (ROS) and degrade in response to localized tissue conditions, allowing controlled biodegradation and reducing inflammation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If traditional biodegradable polymers are used, then the polymers degrade in the body, but the degradation is rapid and produces acidic byproducts causing inflammation

Engineering Contradiction:

Improvedegradation rateVSAvoidacidic byproducts

Core Design Contradiction:

Duration of action of moving objectVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters of the polymer by incorporating tertiary amine groups and hydrophobic segments, transforming the degradation mechanism from hydrolytic to oxidative. This parameter change eliminates acidic byproduct formation while enabling controlled degradation rates.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the previously harmful rapid hydrolytic degradation into a beneficial controlled oxidative degradation process. By using tertiary amines that undergo oxidation to form stable products rather than acidic byproducts, the harmful effect is transformed into a beneficial controlled degradation mechanism.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Stability of the object's composition

If traditional biodegradable polymers are used, then the polymers provide consistent structure, but the degradation rates vary due to different tissue conditions

Engineering Contradiction:

Improvestructural consistencyVSAvoiddegradation consistency

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent introduces local quality variations through hydrophobic segments and tertiary amine groups at specific positions in the polymer chain. These localized structural features create regions with different oxidative susceptibility, allowing the polymer to respond to local tissue ROS levels while maintaining overall structural consistency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent makes the degradation rate dynamic by designing polymers that respond to the local oxidative environment. The tertiary amine groups undergo oxidation at rates proportional to local ROS concentrations, allowing the degradation behavior to adapt dynamically to different tissue conditions rather than following a fixed rate.

Inventive Principle:

Principle #15Dynamics

3Reliability

If traditional biodegradable polymers are used, then the polymers maintain stability, but they lack ROS sequestration capability leading to device failure

Engineering Contradiction:

Improvedevice stabilityVSAvoidROS damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces tertiary amine groups as intermediary molecules that mediate between ROS and the polymer structure. These tertiary amines act as ROS scavengers, accepting oxidative damage themselves and protecting the rest of the polymer device from ROS-induced degradation and failure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The polymer structure itself provides ROS protection through its own tertiary amine groups and hydrophobic segments, which naturally scavenge ROS. The device protects itself from oxidative damage without requiring separate protective coatings or additives.

Inventive Principle:

Principle #25Self-service

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 polymers provide controlled biodegradation and ROS scavenging, minimizing device failure and inflammation by adapting to tissue-specific ROS levels, maintaining localized pH and enhancing tissue integration.

Implementation Method 1

oxidatively degradable polymers incorporating tertiary amines in the backbone, which scavenge reactive oxygen species (ROS)

Methodology Applied

Scientific EffectOxidation: Oxidation

Implementation Method 2

degrade in response to localized tissue conditions, allowing controlled biodegradation

Methodology Applied

Scientific EffectOxidative degradation: Oxidation

Data Source

PatentUS20250325728A1Oxidatively Degrading and ROS Scavenging Polymers

Publication Date: 2025.10.23 BRIDGEWAY INNOVATIONS LLC

AI summary

The proposed invention is a reactive oxygen species scavenging polymer system with biodegradable and biodurable embodiments for biomedical applications. Several embodiments are tailored for patients with high oxidative stress due to comorbidities (diabetes, obesity, peripheral neuropathy, osteoporosis, osteopenia, chronic kidney disease, neurodegenerative diseases, and cardiovascular disease). Other embodiments function independent of atypical oxidative stress to provide a biodegradable biomaterial system. Several embodiments include thiourethane synthetic schemes to create biomaterials for applications requiring increased toughness.