Spring-fit surgical guide slot dynamics
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Solution Overview
Problem
Current surgical guide tools often suffer from inaccuracies and reproducibility issues due to the inherent flexibility and manufacturing limitations, leading to unintended movement of surgical instruments during joint preparation for implantation, which can result in suboptimal placement and increased tissue damage.
Innovation Solution
The integration of a spring-fit structure within guide slots, which incorporates flexing portions that engage and stabilize surgical instruments, providing resistance to deviations from the predetermined cutting plane and improving the consistency of instrument guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional guide slots are used without spring-fit structures, then the device complexity is low and ease of manufacture is high, but the reliability and measurement precision deteriorate due to instrument movement and flexibility
Solution Approach 1:
The guide slot transitions from a static rigid structure to a dynamic spring-fit structure that can flex and adapt. The spring-fit structure allows controlled movement to accommodate instrument insertion while maintaining stable engagement, resolving the contradiction between rigidity for stability and flexibility for instrument access.
Solution Approach 2:
The guide slot is segmented into distinct functional zones: an entrance opening for instrument insertion, a body portion with spring-fit structures for stable engagement, and a guide surface for precise positioning. This segmentation allows each zone to optimize its function independently, improving reliability without excessive complexity.
2Stability of the object's composition
If rigid guide slots are used to prevent movement, then instrument stability improves, but manufacturing precision deteriorates due to inherent flexibility and manufacturing limitations of rigid structures
Solution Approach 1:
The guide slot's physical parameters are changed from completely rigid to elastically flexible through the spring-fit structure. This allows the guide slot to maintain its nominal dimensions and geometry (improving manufacturing precision) while gaining the ability to flex and stabilize instruments (improving compositional stability).
3Ease of operation
If the guide slot is made more flexible to accommodate instruments, then ease of operation improves, but reliability deteriorates due to unintended movement during surgical procedures
Solution Approach 1:
Different portions of the guide slot have different mechanical properties: the entrance opening is designed to be flexible and accommodating for easy instrument insertion, while the guide surface and engagement portions are designed to be rigid and stable for accurate positioning. This local differentiation resolves the contradiction between ease of operation and reliability.
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 spring-fit structure enhances the accuracy and stability of surgical instrument placement, reducing unwanted movement and improving the precision of bone cuts during joint preparation for implantation, thereby facilitating more effective and reproducible surgical procedures.
Implementation Method 1
The integration of a spring-fit structure within guide slots, which incorporates flexing portions that engage and stabilize surgical instruments, providing resistance to deviations from the predetermined cutting plane
Data Source
AI summary
Various embodiments of devices, systems, and methods for surgical procedures, including spring-fit guides for improved guidance of surgical instruments, are disclosed.