Implant Removal Trephine With Helical Grooves and Quick Connect
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Solution Overview
Problem
Existing trephines are inadequate for efficiently cutting away the interface around cylindrical implants implanted within a patient, particularly due to issues with tool attachment and effective cutting mechanisms.
Innovation Solution
A trephine with a hole saw featuring circumferentially spaced cutting teeth and helical grooves, coupled with a quick connect mechanism for secure tool attachment, allowing for efficient cutting and removal of the implant interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional trephine designs are used, then the structure is simple, but the tool attachment is insecure and cutting efficiency is low
Solution Approach 1:
The trephine is divided into separate components: a cylindrical body with cutting teeth, helical grooves for debris removal, and a quick connect mechanism. This segmentation allows the cutting element to be detached and replaced independently, improving tool attachment security while maintaining reasonable structural complexity.
Solution Approach 2:
The quick connect mechanism serves multiple functions: securing the trephine to the tool, enabling rapid attachment and detachment, and providing a standardized interface for different cutting scenarios. This multi-functionality improves reliability without proportionally increasing structural complexity.
2Productivity
If conventional cutting mechanisms are used, then the device structure is simple, but the cutting efficiency through bone and tissue is insufficient
Solution Approach 1:
The cutting teeth are arranged circumferentially around the cylindrical body, creating a continuous cutting action as the trephine rotates. The curved geometry of the teeth and helical grooves optimizes the cutting path through bone and soft tissue, significantly improving cutting efficiency compared to linear cutting mechanisms.
Solution Approach 2:
The helical grooves act as intermediaries that channel cutting debris away from the cutting zone during rotation. This mediator function prevents debris accumulation that would otherwise impede cutting efficiency, while adding only moderate structural complexity.
3Object-generated harmful factors
If standard hole saw design is used, then manufacturing is simple, but debris removal capability is insufficient
Solution Approach 1:
The helical grooves are formed with a spiral curvature that naturally channels debris away from the cutting zone along the rotation path. This curved geometry effectively removes debris without requiring complex additional components, maintaining ease of manufacture while solving the debris accumulation problem.
4Adaptability or versatility
If fixed tool attachment is used, then connection is secure, but versatility for different cutting scenarios is limited
Solution Approach 1:
The quick connect mechanism transitions from a static fixed attachment to a dynamic system that allows rapid engagement and disengagement. The mechanism maintains secure connection during cutting operations while enabling quick changes for different cutting scenarios, improving both versatility and ease of operation.
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 trephine effectively cuts through bone, bone cement, and soft tissue around implants, facilitating easy removal by directing debris away from the patient, and provides versatility in tool attachment for various cutting scenarios.
Implementation Method 1
A trephine with a hole saw featuring circumferentially spaced cutting teeth and helical grooves, coupled with a quick connect mechanism for secure tool attachment, allowing for efficient cutting and removal of the implant interface
Implementation Method 2
The trephine effectively cuts through bone, bone cement, and soft tissue around implants, facilitating easy removal by directing debris away from the patient
Data Source
AI summary
A trephine is provided. The trephine includes a hole saw sized to accommodate an implant, the hole saw having: a cylindrical body having a proximal end, a distal end and an outer surface, a plurality of circumferentially spaced cutting teeth at the distal end of the cylindrical body, and a plurality of helical grooves on the outer surface of the cylindrical body; and a quick connect coupled to the proximal end of the cylindrical body for releasably connecting to a cooperating quick connector of a tool.