3D Printed Ceramic Scaffold Polymer Coating
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Solution Overview
Problem
Current ceramic scaffolds for bone regeneration face challenges in achieving a balance between mechanical strength and degradation, with traditional methods resulting in scaffolds that are either too fragile or have slowed degradation, which can lead to infection and other complications.
Innovation Solution
A ceramic scaffold is developed using a 3D printing process with a framework of hydroxyapatite (HA) and tricalcium phosphate (TCP) coated with a polymer, such as surgical glue or gelatin, to enhance mechanical strength while allowing for controlled degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional fabrication methods are used for HA/TCP scaffolds, then the scaffolds can be manufactured with biocompatible materials, but the mechanical strength is insufficient and the scaffolds are too fragile for further manipulations
Solution Approach 1:
The patent uses composite materials by combining hydroxyapatite (HA) and tricalcium phosphate (TCP) ceramics with a polymer coating. The ceramic framework provides structural support and biocompatibility, while the polymer coating enhances mechanical strength and flexibility. This composite approach allows the scaffold to maintain both biological functionality and sufficient mechanical strength for handling and implantation.
2Strength
If sintering temperature is increased to improve mechanical strength, then the compressive strength increases, but the degradation rate slows down which may cause infection and cancellation risks
Solution Approach 1:
The patent optimizes the sintering temperature parameter to achieve the desired balance between mechanical strength and degradation rate. By controlling the sintering temperature, the scaffold attains sufficient compressive strength while maintaining an appropriate degradation rate that allows for timely replacement before infection or cancellation risks arise.
Solution Approach 2:
The composite structure of ceramic framework with polymer coating allows the scaffold to achieve enhanced mechanical properties without requiring excessive sintering temperature. The polymer coating contributes to the overall mechanical strength, enabling the use of moderate sintering temperatures that preserve the degradation characteristics of the bioceramic materials.
3Duration of action of stationary object
If the scaffold is designed to degrade during bone regrowth, then new bone can form and replace the scaffold, but the residual scaffold may lack sufficient mechanical strength to maintain shape
Solution Approach 1:
The patent employs a composite material system where the biodegradable ceramic framework works in conjunction with a polymer coating. The ceramic provides the degradation pathway for bone regeneration, while the polymer coating maintains structural integrity and mechanical strength during the degradation process, ensuring the scaffold retains its shape and functionality until new bone fully replaces it.
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 achieves significant mechanical strength improvements, with mechanical strength increased up to 20 times and controlled degradation, enabling effective bone regeneration without residual scaffold-related complications.
Implementation Method 1
The coating may include a polymer ("coating polymer"). The coating may be formed on the at least one surface of the framework. The coating may at least partially cover the at least one surface of the framework.
Implementation Method 2
The coating polymer may include a polymer formed by using a surgical glue, a gelatinous protein mixture, poly(ethylene glycol) dimethacrylate (PEGDMA), gelatin methacrylate (GelMA), gelatin, or a mixture thereof.
Data Source
AI summary
This disclosure generally relates to a ceramic scaffold. This disclosure particularly relates to a ceramic scaffold useful for bone regenerations. This disclosure also relates to a ceramic scaffold comprising hydroxyapatite (HA), tricalcium phosphate (TCP), or a mixture thereof. This disclosure also relates to a ceramic scaffold with high mechanical strength and flexibility. This disclosure further relates to a ceramic scaffold manufactured through a three-dimensional (3D) printing process, methods of manufacturing a ceramic scaffold and methods of replacing bone in a subject using the ceramic scaffold.