Segmented 3D Printed Orthopedic Implant with Biodegradable Tissue Ingrowth
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Solution Overview
Problem
Existing orthopedic implants produced by 3D printing lack improved biocompatibility and tolerability, particularly in load-bearing applications, and do not effectively accommodate individual anatomical conditions or support tissue ingrowth.
Innovation Solution
A 3D printed orthopedic implant comprising a first portion made of high-strength materials like PEEK for mechanical support and a second portion made of biodegradable materials such as polydioxanone or PLGA for tissue ingrowth, which can be customized using patient-specific data and manufactured using FLM methods, allowing for seamless integration and potential incorporation of pharmacologically active substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single material is used for the entire implant, then manufacturing is simplified, but both mechanical strength and biocompatibility cannot be simultaneously optimized
Solution Approach 1:
The implant is divided into two distinct portions: a first portion made of PEEK providing mechanical support and a second portion made of biodegradable material promoting tissue ingrowth. This segmentation allows each portion to be optimized for its specific function while both are manufactured using the same 3D printing process.
Solution Approach 2:
The implant combines two different materials with complementary properties: PEEK (high strength, rigid) for the support structure and biodegradable material (promotes tissue integration) for the inner portion. This composite approach enables simultaneous optimization of mechanical strength and biocompatibility.
2Strength
If the implant is designed with a solid structure for mechanical strength, then load-bearing capacity is improved, but tissue ingrowth is hindered
Solution Approach 1:
The implant structure is segmented into an outer PEEK portion providing mechanical strength and an inner biodegradable portion with porous structure facilitating tissue ingrowth. The porous structure of the second portion allows bone tissue to penetrate and integrate with the implant.
Solution Approach 2:
Different regions of the implant have different structural qualities: the first portion has a dense, strong structure for load bearing, while the second portion has a porous, bioactive structure for tissue integration. This local differentiation optimizes both mechanical performance and biological compatibility.
3Ease of manufacture
If conventional manufacturing methods are used, then production costs are higher, but customization to individual anatomical conditions is limited
Solution Approach 1:
The 3D printing process enables precise control of material deposition parameters, allowing customization of implant geometry, porosity, and material distribution to match individual patient anatomy. Patient-specific CT scan data is used to generate customized implant designs.
Solution Approach 2:
The implant is manufactured by copying patient-specific anatomical data from CT scans or MRI images into a 3D digital model, which is then printed as a physical implant. This digital copying process enables precise customization while maintaining manufacturing efficiency.
Data Source
AI summary
The present disclosure relates to an orthopedic implant, wherein the implant is a 3D printed part and comprises at least one first portion and at least one second portion, the first portion forming a support structure and the second portion being at least partially made of a biodegradable material.The present disclosure further relates to a method of manufacturing an orthopedic implant.