Nano Bubble Generator for Root Canal Irrigation
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Solution Overview
Problem
Current dental irrigation methods, particularly ultrasonic irrigation, struggle to effectively remove foreign substances from the root canal due to the large size of bubbles generated, which limits the removal of micro foreign substances attached to the canal walls, necessitating the development of a technology capable of generating nano-scale bubbles.
Innovation Solution
A nano bubble generator is designed to produce nano-scale bubbles within a fluid using a porous material generator, a nozzle with a converger and diffuser to control fluid flow, and an ultrasonic portion with a piezoelectric element to maintain bubble distribution, allowing for the effective irrigation of root canals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ultrasonic irrigation is used to clean root canal, then the irrigation effect is enhanced by generating acoustic streaming and bubbles, but the bubble size becomes too large (100 micrometers to 1 millimeter) to effectively remove micro foreign substances from canal walls
Solution Approach 1:
The invention segments the bubble generation process into two stages: first generating micro-bubbles through decompression of pressurized irrigation solution, then further reducing them to nano-scale through ultrasonic cavitation. This two-stage segmentation allows achieving both high productivity and precise nano-scale bubble size control.
Solution Approach 2:
The invention applies preliminary decompression to generate micro-bubbles before applying ultrasonic waves. This preliminary action creates initial bubbles that serve as nuclei for subsequent ultrasonic cavitation, enabling more efficient energy utilization and controlled nano-scale bubble formation.
2Manufacturing precision
If decompression or turbulent vortex methods are used to generate micro or nano-scale bubbles, then nano bubbles can be produced, but the device becomes relatively large and cannot be directly applied to dental instruments
Solution Approach 1:
The invention merges two bubble generation mechanisms (decompression and ultrasonic cavitation) into a single integrated system. The decompression chamber and ultrasonic generator are combined in one device, allowing compact design while achieving nano-scale bubble production suitable for dental handpieces.
Solution Approach 2:
The invention changes key operating parameters including pressurization level (3-5 atm), decompression rate, and ultrasonic frequency to optimize bubble size control. By adjusting these parameters, the device achieves nano-scale bubbles without requiring large device dimensions.
3Device complexity
If large bubbles are used in root canal irrigation, then the device can be simple and easy to operate, but the irrigation effect is degraded and micro foreign substances cannot be removed
Solution Approach 1:
The invention introduces ultrasonic mechanical vibration to the decompression-generated micro-bubbles. This vibration causes cavitation that reduces bubbles to nano-scale while maintaining device simplicity. The ultrasonic vibration is applied through a transducer integrated into the irrigation system.
Solution Approach 2:
The invention utilizes phase transition of the irrigation solution from pressurized liquid state to decompressed state with dissolved gas, then to bubble formation through ultrasonic cavitation. This phase transition sequence enables controlled bubble size reduction while keeping the device compact.
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 nano bubble generator stably generates and sprays nano-scale bubbles, enhancing the removal of micro foreign substances from root canals by applying ultrasonic waves, improving the irrigation effect and ensuring complete cleaning.
Implementation Method 1
an ultrasonic portion disposed in the nozzle and configured to apply ultrasonic waves to the fluid containing the bubbles
Implementation Method 2
an ultrasonic portion with a piezoelectric element to maintain bubble distribution
Implementation Method 3
a bubble generator using a decompression or a turbulent vortex has been widely employed. Bubble generation technology using a decompression device refers to generating bubbles during a process of decompressing a super-saturated liquid
Implementation Method 4
Bubble generation technology using a turbulent vortex refers to generating bubbles by dropping the pressure within a fluid to be less than or equal to a saturated vapor pressure through the fast spinning vortex flow
Implementation Method 5
generating bubbles by dropping the pressure within a fluid to be less than or equal to a saturated vapor pressure
Data Source
AI summary
Provided are a nano bubble generator for irrigating a root canal of a tooth and a dental device including the nano bubble generator. The nano bubble generator may include a generator configured to generate nano-scale bubbles within a fluid, a nozzle connected to the generator and configured to move the fluid containing bubbles that flows in from the generator and to apply the fluid at the end of the nozzle, and an ultrasonic portion disposed in the nozzle and configured to apply ultrasonic waves to the fluid containing the bubbles so that the bubbles are maintained in a distributed form.