Orthopedic Staple Geometry for Even Compression and Low Irritation
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Solution Overview
Problem
Current staples used in orthopedic procedures cause soft tissue damage and irritation due to their geometry, leading to uneven compression and reduced torsional stability, which can result in delayed or malunion of tissue repair sites.
Innovation Solution
A stabilization device with parallel legs and cross-members that are positioned entirely within the target tissue areas, using alignment elements like pins for secure fixation, formed from materials like Nitinol to minimize protrusion and irritation, ensuring even compression and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional staples with bridges are used to couple tissue areas, then tissue coupling is achieved, but soft tissue damage and irritation occur due to bridge protrusion
Solution Approach 1:
The bridge structure that causes soft tissue irritation is completely removed from the staple design. The patent describes staples where legs extend beyond the compression point without any bridging member, eliminating the harmful protruding element while maintaining the tissue coupling function through the legs themselves.
Solution Approach 2:
Instead of having legs converge at a bridge that protrudes outward, the design inverts this geometry by having legs diverge from the compression point and extend beyond it. This reversal of the traditional staple geometry eliminates tissue irritation while preserving compression and coupling capabilities.
2Force
If traditional staples with variable leg distances are used, then tissue compression is applied, but uneven compression across the repair site occurs leading to delayed or malunion
Solution Approach 1:
The patent implements uniform spacing between corresponding legs at the compression point, ensuring even distribution of compression force across the entire repair site. This localized precision in spacing geometry directly addresses the uneven compression problem while maintaining effective compressive force.
3Reliability
If traditional triangular-shaped staples are used, then tissue coupling is achieved, but torsional stability is reduced due to geometry
Solution Approach 1:
The patent transitions from symmetric triangular staple geometry to an asymmetric rectangular configuration with four legs. This asymmetric design provides superior torsional stability while maintaining effective tissue coupling through the parallel leg arrangement and compression mechanism.
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 stabilization device reduces tissue irritation and trauma, providing superior control and accuracy, leading to faster healing and improved surgical outcomes by maintaining even compression and enhancing torsional stability.
Implementation Method 1
The first and second legs and the one or more cross-members can be formed from a metal alloys. For example, the first and second legs and the one or more cross-members can be formed from Nitinol.
Data Source
AI summary
Stabilization device embodiments for use in orthopedic procedures to couple to target areas of tissue. Stabilization devices described can be used to fuse, fix, provide a preselected spacing, and/or provide a preselected compression to target areas during use. Stabilization devices can be coupled to target areas using alignment elements such as pins, k-wires, and/or screws.