Pivoting Bone Cutting Tooth for Variable-Diameter Bores
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Solution Overview
Problem
Existing bone drilling tools are limited in their ability to efficiently create bores with varying diameters, which are necessary for surgical procedures such as anchor insertion, drug administration, and biological material insertion, as they often require multiple tools or complex maneuvers to achieve different diameters.
Innovation Solution
A bone material removal device with a tubular element and a shaft element featuring a cutting tooth that can pivot between closed and open orientations, allowing for the formation of bores with varying diameters through selective rotation and axial displacement, facilitated by a shaft displacement actuator and eccentric rotatable mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional bone drilling tools are used, then drilling of a bore is achieved, but the bore cannot have varying diameters or undercut portions
Solution Approach 1:
The cutting tooth is designed to be movable relative to the tubular element, transitioning between a first position for initial bore drilling and a second position for undercut bore formation. This dynamic configuration allows a single tool to perform multiple drilling functions with varying bore diameters, resolving the contradiction between versatility and structural simplicity.
2Adaptability or versatility
If a single bore diameter is drilled, then drilling simplicity is maintained, but surgical procedures requiring varying diameters cannot be performed
Solution Approach 1:
The movable cutting tooth allows the device to adapt its configuration during operation. The cutting tooth can be positioned in a first location for drilling an initial bore and a second location for forming an undercut bore, enabling versatile surgical applications while maintaining operational simplicity through a single integrated device.
3Manufacturing precision
If multiple drilling tools are used for varying diameters, then bore dimension requirements are met, but procedural time and complexity increase
Solution Approach 1:
The device merges multiple drilling functions into a single integrated tool. By combining the initial bore drilling capability with the undercut bore formation capability in one device with a movable cutting tooth, the invention eliminates the need to switch between multiple drilling tools, thereby reducing surgical procedure time while maintaining precise bore dimension control.
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 drilling of bores with varying diameters, facilitating procedures like anchor insertion and biological material introduction by providing a mechanism to control and expand bore diameters, enhancing surgical precision and efficiency.
Implementation Method 1
a cutting tooth operatively pivotably connected to the shaft element; the shaft element is positionable in a proximal operative orientation causing the cutting tooth to assume a closed operative orientation; and the shaft element is positionable in a distal operative orientation, upon axial displacement of the threaded portion over the inner threading, causing the cutting tooth to assume an open operative orientation
Data Source
AI summary
A bone material removal device, including a tubular element comprising a proximal end and a distal end, a shaft received within the tubular element and comprising a proximal end and a distal end, a cutting tooth movably coupled to the distal end of the shaft and a shaft displacement actuator at the proximal end of the tubular element rotatably coupled to the shaft, wherein at least partial rotation of the actuator in a first direction brings the cutting tooth to travel from a closed retracted position to an open extended position.