Flexible Non-Cutting Endodontic Activator for Root Canal Cleaning
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Solution Overview
Problem
Current endodontic tools, particularly ultrasonically activated metal instruments, are limited in effectively removing the smear layer from the root canal due to their size, flexibility, and tendency to dampen vibrational energy in curved canals, leading to incomplete cleaning and potential iatrogenic events.
Innovation Solution
A flexible, non-cutting endodontic activator with a snap-on coupler and a vibrated active portion made from materials like nylon or Delrin, designed to reach the full length of the root canal, using sonic vibrations to induce hydrodynamic action and enhance cleaning without damaging the canal walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultrasonically activated metal instruments are used to clean the root canal, then cleaning effectiveness is improved, but the instruments dampen vibrational energy when contacting curved canal walls
Solution Approach 1:
The patent employs a flexible, non-cutting activator made of elastic material that can conform to curved root canal walls without dampening sonic vibrations. The flexibility allows the activator to maintain contact with irregular canal surfaces while transmitting vibrational energy effectively, resolving the contradiction between cleaning effectiveness and energy loss.
Solution Approach 2:
The patent changes the material parameter from rigid metal to flexible elastic material, and changes the operational parameter from ultrasonic to sonic frequency. This parameter change allows the activator to adapt to curved geometries while maintaining vibrational energy transmission, eliminating the energy dampening problem of metal instruments.
2Reliability
If metal cutting files or ultrasonically activated metal instruments are used, then cleaning capability is improved, but the risk of iatrogenic events increases
Solution Approach 1:
The patent employs a disposable, non-cutting activator that is discarded after single use. This eliminates the risk of instrument breakage and perforation associated with reusable metal files, while still providing effective cleaning through sonic vibration and hydrodynamic action.
Solution Approach 2:
The patent converts the potential harm of mechanical contact by using a non-cutting flexible activator that contacts canal walls without causing damage. The flexibility and elasticity of the material allow safe contact that enhances cleaning through vibration transmission without the risk of iatrogenic events.
3Reliability
If traditional metal files are used to remove smear layer, then cleaning action is improved, but the instruments are too large to reach the end of smaller diameter canals
Solution Approach 1:
The patent uses a flexible activator with a diameter small enough to reach the apical terminus of even narrow canals. The flexibility allows the activator to navigate curved and constricted canal geometries that would be inaccessible to rigid metal files, while still providing effective cleaning through sonic vibration.
4Strength
If threaded connection with wrenches is used to attach tools to driver, then connection strength is improved, but the attachment and removal process becomes time-consuming
Solution Approach 1:
The patent divides the attachment system into a modular snap-on coupler that connects to the driver without tools. This segmentation allows for rapid attachment and removal while maintaining sufficient connection strength through the snap-on mechanism, eliminating the time-consuming threaded connection process.
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 activator effectively removes the smear layer and organic debris from the root canal system, reducing the risk of bacterial leakage and iatrogenic events, while allowing for easy tool attachment and removal, and achieving deeper cleaning with sonic energy that is not dampened by contact with the canal walls.
Implementation Method 1
inducing sonic vibrations through the overall length of the activator to initiate a hydrodynamic action in the solution
Implementation Method 2
initiate a hydrodynamic action in the solution in the root canal to effectively move the solution(s) into the deep lateral anatomy
Data Source
AI summary
An endodontic activator is provided to facilitate the removal of pulp tissue, the smear layer, bacteria and related irritants from a root canal system. The activator is a sonically driven activator made from a strong, flexible, non-metallic, and non-cutting material. The activator can be smooth, flocked or brush-like. The activator comprises a snap-on coupler which is adapted to attach the tool to a driver without the use of tools. The activator can be provided with fluid passages which allow for irrigating reagents to be delivered into or vacuumed from the root canal space during endodontic procedures. By inducing sonic vibrations in the activator, hydrodynamic phenomena are induced in the solution in the root canal to enhance deep lateral cleaning of the root canal system of the tooth.