Intramedullary Device Compound Fastener Trajectories
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Solution Overview
Problem
Existing intramedullary fixation devices lack optimal angular stability and versatility for secure bone fixation, particularly in varying bone structures, leading to suboptimal retention and placement within bones.
Innovation Solution
The intramedullary device features a rod-like construct with multiple bores at compound angles and trajectories, allowing for adjustable alignment and fastener placement to enhance stability and interchangeability across different bones, thereby improving retention and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If multiple through-bores are disposed at various angles to improve angular stability and retention, then the device achieves better fixation stability, but the device complexity and number of openings increase
Solution Approach 1:
The patent transitions from conventional single-plane through-bores to compound trajectories that extend in multiple dimensions. The through-bores are arranged in a three-dimensional configuration with varying angles and orientations, allowing fasteners to be placed at multiple angles relative to the longitudinal axis. This dimensional change enables improved angular stability without simply adding more openings in a single plane, but rather utilizing spatial arrangement in multiple dimensions.
Solution Approach 2:
The fixation device is segmented into multiple through-bores distributed along the longitudinal axis, with each bore positioned at specific compound angles and trajectories. This segmentation allows the device to engage bone at multiple discrete points with varying orientations, distributing the fixation load across different angular planes and improving overall retention while maintaining a manageable number of openings.
2Adaptability or versatility
If through-bores are arranged at various angles to optimize fastener placement, then the versatility for different bone structures improves, but the manufacturing precision requirements increase
Solution Approach 1:
The intramedullary device is designed with universal applicability through its compound trajectory through-bores that can accommodate various bone structures and anatomical variations. The multi-angular configuration allows the same device to be used across different bone types and sizes by selecting appropriate fastener placements at different angles, making the device versatile for multiple surgical applications without requiring custom-designed devices for each bone structure.
Solution Approach 2:
The device utilizes parameter changes in the through-bore configuration, with bores positioned at specific compound angles and trajectories along the longitudinal axis. These predetermined angular parameters are designed to provide optimal fixation for various bone structures, allowing surgeons to select and adjust fastener placement based on specific anatomical requirements while maintaining manufacturing precision through standardized bore positioning.
Data Source
Figure 1
Figure 2A~2B
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AI summary
An intramedullary device, having a first longitudinal axis extending between a proximal end and a distal end thereof, is provided. The intramedullary device may include a first bore and a second bore. The first bore may include a second longitudinal axis and may extend through the intramedullary device between a first opening and a second opening. The second longitudinal axis may define a first angle (θ1) with the first longitudinal axis. The second bore may include a third longitudinal axis and may extend through the intramedullary device between the first opening and a third opening. The third longitudinal axis may define a second angle (θ2) with the first longitudinal axis.