Mesh Cage Scoring Disc Cutting for Clean Spinal Implant Sizing
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Solution Overview
Problem
Current methods for cutting spinal mesh cages to desired lengths are either time-consuming and damage the edges, or require a large inventory of varying sizes, neither of which is economical or safe for patient anatomy.
Innovation Solution
A surgical system comprising a scoring device with a fixed body, handle, threaded rod, and scoring discs that creates a score mark on the mesh cage, allowing for precise cutting and removal of excess material without damaging the surrounding tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tin snips are used to cut the mesh cage, then the mesh cage can be cut to the desired length, but the cutting process is time-consuming and leaves jagged edges that can damage patient anatomy
Solution Approach 1:
The patent replaces the manual tin snips cutting mechanism with a specialized cutting device that includes a cutting blade and scoring tool. This mechanical substitution enables precise, clean cuts through the mesh cage material without creating jagged edges, thereby eliminating the harmful effect while maintaining cutting capability
Solution Approach 2:
The patent introduces a scoring tool as an intermediary element that first creates a score line on the mesh cage before the actual cut is made. This intermediary step guides the cutting blade to follow a precise path, ensuring a clean cut without jagged edges that could damage patient anatomy
2Quantity of substance
If only one mesh cage length is stocked to reduce inventory, then inventory costs are reduced, but the surgeon cannot provide the exact size needed without cutting
Solution Approach 1:
The patent enables preliminary sizing actions by providing a device that can accurately measure and mark the desired length on the mesh cage before insertion. The surgeon can precisely determine the required size intraoperatively and make accurate cuts, ensuring the exact size is provided without needing to stock multiple sizes
3Manufacturing precision
If a large inventory of varying mesh cage sizes is maintained to provide exact sizes, then the patient receives the precise size needed, but this is not economical
Solution Approach 1:
The patent creates a universal cutting and sizing device that can accommodate mesh cages of various sizes and configurations. This multi-functional tool enables surgeons to precisely size any mesh cage intraoperatively, eliminating the need to maintain large inventories of pre-sized cages while still providing exact sizes when needed
4Measurement precision
If the mesh cage is cut to exact size using traditional methods, then the desired length is achieved, but the process is time-consuming
Solution Approach 1:
The patent replaces time-consuming manual measurement and marking processes with an integrated device that combines measurement, scoring, and cutting functions. This mechanical system achieves precise desired length marking and cutting in a single operational sequence, significantly reducing the time required while maintaining measurement precision
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
Enables efficient and clean cutting of mesh cages to the desired length with smooth edges, reducing the risk of tissue damage and minimizing inventory needs.
Implementation Method 1
a scoring device with a fixed body, handle, threaded rod, and scoring discs that creates a score mark on the mesh cage
Data Source
Figure 1
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AI summary
A scoring system includes a scoring device and a mandrel. The scoring device includes at least one scoring disc configured to engage a surface of a mesh cage. In an open condition, the scoring disc is positioned away from the mesh cage and in a closed condition, the scoring disc engages a surface of the mesh cage. The scoring device is rotatable about the longitudinal axis of the mesh cage when in the closed condition to score the mesh cage at a desired length from an end of the mesh cage. The mandrel is insertable within the mesh cage to support and/or retain a portion of the mesh cage. The mandrel can also apply a force to the score mark to cleanly separate two portions of the mesh cage at the score mark.