Nested Spinal Milling Cutter for Diameter Changes Without Replacement
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Solution Overview
Problem
Existing spinal milling cutters require laborious replacement to change the working diameter, prolonging procedures and increasing the risk of complications.
Innovation Solution
A spinal milling cutter system with an axial passage for accommodating a further milling cutter, allowing for seamless transition between cutters of different diameters, enabling safer and more flexible work on bone structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a spinal milling cutter with a larger working diameter is used, then the ability to work on larger bone structures is improved, but the device complexity increases due to requiring multiple cutters and replacement procedures
Solution Approach 1:
The patent implements nesting by placing a first spinal milling cutter with a smaller working diameter inside the axial passage of a second spinal milling cutter with a larger working diameter. This allows both cutters to be simultaneously present at the site of use, enabling seamless transition between different working diameters without removal and replacement procedures.
Solution Approach 2:
The second spinal milling cutter with the larger working diameter serves multiple functions: it can work on bone structures independently, and it can also serve as a protective sheath and guide for the first spinal milling cutter with the smaller working diameter. This multi-functionality reduces the need for separate devices for each operation.
2Adaptability or versatility
If spinal milling cutters are replaced to change working diameter, then the adaptability to different bone structure sizes is improved, but the procedure time increases significantly
Solution Approach 1:
By nesting the first spinal milling cutter inside the axial passage of the second spinal milling cutter, the system allows both cutters to be simultaneously positioned at the site of use. This eliminates the time-consuming removal and replacement procedures, as the smaller cutter can be directly introduced through the larger cutter's axial passage.
Solution Approach 2:
The system is prepared in advance with both spinal milling cutters positioned in a nested configuration before reaching the site of use. The first cutter is already accommodated within the axial passage of the second cutter, so no time is spent on arrangement or replacement during the actual procedure.
3Adaptability or versatility
If spinal milling cutters are replaced to change working diameter, then the flexibility to adapt to different surgical needs is improved, but the risk of complications increases
Solution Approach 1:
The nested configuration allows the first spinal milling cutter to be introduced through the axial passage of the second cutter, eliminating the need for removal and replacement at the site of use. This continuous, seamless transition minimizes the risk of complications associated with cutter replacement procedures.
Solution Approach 2:
The second spinal milling cutter with the larger working diameter acts as an intermediary protective sheath for the first spinal milling cutter during insertion and operation. This protective role reduces the risk of tissue damage and complications while allowing flexible switching between different working diameters.
4Measurement precision
If a smaller spinal milling cutter is used as a guide within a larger one, then the precision and control of bone structure manipulation is improved, but the device complexity increases
Solution Approach 1:
The first spinal milling cutter with the smaller working diameter is nested inside the axial passage of the second spinal milling cutter, serving as both a functional cutting tool and a guide. This nested arrangement provides precise control and guidance while maintaining a relatively simple overall device structure.
Solution Approach 2:
The second spinal milling cutter serves dual functions: it acts as a protective sheath and guide for the first cutter, and it can also perform independent cutting operations. This multi-functionality reduces the need for separate guide devices, thereby limiting the increase in device complexity.
Data Source
AI summary
A spinal milling cutter for working on bone structures in the region of the vertebral column. A distal end face of the spinal milling cutter is provided with a milling cutter toothing having a tooth profile with at least two teeth. The spinal milling cutter has an axial passage for receiving a further spinal milling cutter. A vertebral column system is also provided having the spinal milling cutter and having a further spinal milling cutter. A method for working on bone structures in the region of the vertebral column via the spinal milling cutter is also provided.