Coated Powder Composite for Biodegradable Orthopedic Implants
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Solution Overview
Problem
Current orthopedic implants, primarily made from metals like Titanium alloys and cobalt-chrome, often require revision or removal surgeries, leading to increased medical costs and patient discomfort due to compatibility issues and limited use of additive manufacturing with materials like Ti, Ni, or Co—Cr alloys.
Innovation Solution
Development of a coated powder composite using magnesium (Mg) and aluminum (Al) based core particles with biocompatible coating layers for additive manufacturing, enabling the creation of high-strength, biodegradable medical implants with controlled dissolution rates and improved mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal implants like Titanium alloys and cobalt-chrome are used, then mechanical strength is improved, but biocompatibility and patient comfort deteriorate due to compatibility issues and need for revision surgeries
Solution Approach 1:
The patent employs composite materials consisting of biodegradable metal core particles (magnesium, calcium, or aluminum-based) coated with biocompatible metal layers (titanium, nickel, or cobalt-chrome). This composite structure allows the implant to exhibit both high mechanical strength from the metallic coating and improved biocompatibility from the biodegradable core that gradually dissolves in the body, eliminating the need for revision surgeries.
2Strength
If traditional metal materials are used for implants, then mechanical strength is improved, but manufacturing flexibility deteriorates due to limited use of additive manufacturing
Solution Approach 1:
The patent changes the material parameters by developing coated powder composites with specific core material compositions (magnesium, calcium, or aluminum-based) and controlled coating layers that are optimized for additive manufacturing processes. The coating composition and thickness are carefully controlled to ensure proper melting characteristics during additive manufacturing while maintaining mechanical strength, enabling flexible manufacturing of complex implant geometries.
3Reliability
If biodegradable materials like Mg and Al are used, then biocompatibility is improved, but mechanical strength deteriorates
Solution Approach 1:
The patent creates composite powder particles where biodegradable core materials (magnesium, calcium, or aluminum) are coated with biocompatible metal layers (titanium, nickel, or cobalt-chrome). The composite structure allows the biodegradable core to provide biocompatibility and controlled dissolution while the metallic coating maintains mechanical strength and structural integrity during additive manufacturing and initial implantation.
Solution Approach 2:
The patent applies different material properties to different regions of the same particle: the core provides biodegradability and biocompatibility while the outer coating layer provides mechanical strength and structural stability. This local differentiation of material properties allows each region to fulfill its specific function optimally within the composite structure.
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 coated powder composite allows for the production of orthopedic implants with enhanced mechanical strength, biocompatibility, and controlled degradation rates, reducing the need for revision surgeries and improving patient recovery by mimicking natural bone properties.
Implementation Method 1
The depositing may include chemical vapor deposition
Data Source
AI summary
A coated powder composite may include a core particle of Ca or an alloy thereof, or of Mg or an alloy thereof. One or more coating layers may be disposed about the core particle, cladding the core particle. The coated powder composite may be biodegradable.