Segmented Modular Implant With External Bone Fixation
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Solution Overview
Problem
Existing medical prostheses require larger incisions for installation, leading to increased recovery time and complications, and there is a need to minimize the size of the implant to address this issue.
Innovation Solution
A modular implant system with external fixation elements, such as threads or ridges, that engage the bone to secure the implant components within the intramedullary canal, allowing for smaller incisions and improved fixation without additional coatings like plasma spray.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing medical prostheses are used, then the implant provides sufficient fixation, but the incision size must be large leading to increased recovery time and complications
Solution Approach 1:
The implant is divided into multiple modular components (proximal component, intermediate component, distal component) that can be assembled in segments. This segmentation allows the implant to be inserted through a smaller incision while maintaining overall fixation strength through the combined action of external fixation elements on each component.
Solution Approach 2:
The invention transitions from relying solely on internal fixation (within the intramedullary canal) to incorporating external fixation elements that engage the bone cortex. This dimensional change from internal to external fixation enables smaller incisions while achieving reliable fixation through the external engagement of bone.
2Length of moving object
If implant size is minimized, then incision size and recovery time are reduced, but fixation reliability may be compromised
Solution Approach 1:
The modular components are designed to nest within each other during insertion, with each component containing fixation elements that engage bone at different locations. This nested arrangement allows minimal incision size while maintaining fixation reliability through distributed engagement points along the implant length.
Solution Approach 2:
The implant components utilize composite construction combining materials with different properties (e.g., titanium alloy for strength, porous coatings for bone ingrowth). This composite approach allows minimization of implant dimensions while maintaining sufficient fixation strength through optimized material properties.
3Reliability
If external fixation elements are added, then fixation strength is improved, but manufacturing complexity increases
Solution Approach 1:
The external fixation elements are designed as universal features that can be integrated into standardized modular components. These fixation elements serve multiple functions (primary fixation, secondary stabilization, bone growth promotion) across different implant configurations, reducing overall manufacturing complexity through standardization.
4Adaptability or versatility
If modular components are used, then installation flexibility is improved, but device complexity increases
Solution Approach 1:
The implant is segmented into modular components connected by coupling elements, allowing flexible assembly configurations adapted to different patient anatomies and surgical requirements. This segmentation provides installation flexibility while managing complexity through standardized connection interfaces.
Data Source
AI summary
An apparatus includes a body extending from a first end to a second end. The first end is a leading end, and the second end includes a first coupling element configured to couple the body to a first other component. The body includes an external fixation element extending along a length of the first component. The external fixation element is configured to engage bone. Systems and methods are also disclosed.