Manganese Nanoparticle Composite Scaffold for Bone Repair

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Solution Overview

Problem

Existing orthopedic repair scaffolds made from biodegradable polymers, such as PLLA, have insufficient mechanical strength and low medical imaging quality, limiting their effectiveness in bone defect treatment.

Innovation Solution

A three-dimensional porous orthopedic repair scaffold composed of 80-95% biodegradable polymer and 5-20% biodegradable manganese compound nanoparticles, with a pore diameter of 300 μm to 500 μm and porosity of 60-80%, is developed using a 3D printing process and freeze-drying method, enhancing mechanical strength and medical imaging capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an orthopedic repair scaffold is made from biodegradable polymer (PLLA), then biocompatibility and degradability are improved, but mechanical strength becomes insufficient

Engineering Contradiction:

ImprovebiocompatibilityVSAvoidmechanical strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent combines biodegradable polymer (PLLA) with biodegradable nanoparticles to create a composite scaffold material. This composite structure maintains the biocompatibility and degradability of the polymer while the nanoparticle reinforcement significantly enhances mechanical strength, resolving the contradiction between softness and strength requirements for bone repair scaffolds

Inventive Principle:

Principle #40Composite materials

2Duration of action of stationary object

If an orthopedic repair scaffold is made from biodegradable polymer (PLLA), then biodegradability is improved, but medical imaging quality becomes low

Engineering Contradiction:

ImprovebiodegradabilityVSAvoidmedical imaging quality

Core Design Contradiction:

Duration of action of stationary objectVSMeasurement precision

Solution Approach 1:

The patent incorporates biodegradable nanoparticles into the PLLA polymer matrix to create a composite scaffold. These nanoparticles serve dual functions: maintaining the biodegradability of the scaffold while providing enhanced medical imaging capabilities, thereby resolving the contradiction between biodegradability and imaging quality

Inventive Principle:

Principle #40Composite materials

3Reliability

If autologous bone transplantation is used, then reliable clinical curative effect is achieved, but donor site complications and limited sources occur

Engineering Contradiction:

Improveclinical curative effectVSAvoidbone source availability

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent creates a porous three-dimensional scaffold structure that mimics natural bone architecture. This porous structure allows for bone ingrowth, cell attachment, and nutrient transport, providing a reliable alternative to autologous bone transplantation by eliminating the need for donor sites while maintaining clinical effectiveness

Inventive Principle:

Principle #31Porous materials

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 scaffold promotes bone healing by consuming hydrogen peroxide, improving oxygen levels and osteoblast activity, and exhibits improved compressive strength, mechanical performance, and medical imaging quality, facilitating bone regeneration and defect treatment.

Implementation Method 1

The manganese compound can consume excessive hydrogen peroxide in a microenvironment and generate oxygen

Methodology Applied

Scientific EffectHydrogen peroxide decomposition: Decomposition (biological)

Implementation Method 2

freeze-drying the molded three-dimensional porous scaffold to obtain the orthopedic repair scaffold

Methodology Applied

Scientific EffectFreeze-drying: Freeze Drying

Data Source

PatentUS20230330302A1Orthopedic repair scaffold, preparation method thereof and use thereof

Publication Date: 2023.10.19 SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI

AI summary

Provided are an orthopedic repair scaffold, a preparation method thereof and use thereof. The orthopedic repair scaffold is a three-dimensional porous scaffold. A material of the orthopedic repair scaffold comprises the following components in mass percentage: 80%-95% of a biodegradable polymer and 5%-20% of a biodegradable nanoparticle, where the biodegradable nanoparticle is a nanoparticle of manganese compound. The preparation method of the orthopedic repair scaffold comprises: preparing a homogeneous solution comprising a biodegradable polymer and a biodegradable nanoparticle according to the mass percentage; preparing the homogeneous solution through a curing molding process into a molded three-dimensional porous scaffold; and freeze-drying the molded three-dimensional porous scaffold to obtain the orthopedic repair scaffold. The orthopedic repair scaffold can better promote healing of a bone injury and has an excellent mechanical performance and a good medical imaging function.