Augment Implant with Irregular Outer and Regular Inner Porous Structures
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Solution Overview
Problem
Conventional porous augment implants have low mechanical strength, leading to damage and issues with bone cement leakage, and require complex 3D printing designs that increase manufacturing costs and time due to the need for supports and high data capacity.
Innovation Solution
An augment implant with a porous structure featuring a first porous part of irregular shape on the outer side for initial fixation and bone ingrowth, and a second porous part of regular shape on the inner side for long-term stability, combined with a nonporous frame part for reinforcement, allowing for easier support removal and reduced data requirements in 3D printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the augment implant is formed with only a porous material having multiple pores, then a patient's autogenous bone growth can be promoted, but the mechanical strength of the augment implant is decreased
Solution Approach 1:
The patent applies different porous structures to different regions of the augment implant. The outer surface has an irregular porous structure with higher porosity to promote bone ingrowth, while the inner region has a regular porous structure with lower porosity to provide mechanical strength. This local differentiation resolves the contradiction between promoting bone growth and maintaining structural integrity.
Solution Approach 2:
The patent creates a composite structure combining two types of porous materials with different properties. The irregular porous structure (outer layer) provides biological functionality for bone ingrowth, while the regular porous structure (inner layer) provides mechanical support. This composite approach allows both bone growth promotion and mechanical strength to be achieved simultaneously.
2Reliability
If a porous structure with complex shape is designed for 3D printing, then bone ingrowth is promoted, but the data capacity increases and manufacturing costs and time increase
Solution Approach 1:
The patent segments the porous structure into two distinct types: irregular porous structure for the outer surface and regular porous structure for the inner region. This segmentation allows each region to be designed with appropriate complexity - the irregular structure only where needed for bone contact - thereby reducing overall data capacity and manufacturing complexity while maintaining bone ingrowth capabilities.
Solution Approach 2:
The patent applies complexity locally rather than uniformly throughout the entire implant. The irregular porous structure is applied only to the outer surface where bone contact occurs, while the inner region uses a simpler regular structure. This localized application of complexity reduces total data requirements and manufacturing burden while preserving essential biological functions.
3Reliability
If the entire augment implant is made of porous structure, then bone ingrowth is induced, but the manufacturing time and labor costs increase
Solution Approach 1:
The patent applies porous structures only to the regions where they are functionally necessary - the outer surface for bone ingrowth - while using a simpler regular structure for the inner region. This selective application of porous manufacturing reduces overall manufacturing time and labor costs while maintaining essential bone integration capabilities.
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 solution enhances the mechanical strength of the implant, reduces damage, and lowers manufacturing costs and time by enabling efficient bone ingrowth, secure fixation, and simplified 3D printing processes while maintaining lightweight and effective bone integration.
Implementation Method 1
a porous structure of an irregular shape is formed on the outer side of the augment implant... ensuring an initial fixing power by means of a rough surface
Implementation Method 2
inducing bone ingrowth to provide a long-term biological fixing power
Data Source
AI summary
Proposed is an augment implant to which different types of porous structures are applied and, more specifically, an augment implant to which different types of porous structures are applied in which a porous structure of an irregular shape is formed on the outer side of the augment implant and a porous structure of a regular shape is formed on the inner side of the augment implant, thereby ensuring an initial fixing power by means of a rough surface, inducing bone ingrowth to provide a long-term biological fixing power, making the augment implant lightweight, enabling a structure thereof to be shaped with a remarkably low amount of data, reinforcing the strength of a body part having a porous structure through a frame part having a nonporous structure, and facilitating the discharge of remaining inner powder through a powder hole.