Backflow Irrigation Needle Tip With Laser-Formed Inclined Holes
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Solution Overview
Problem
Existing irrigation needle tips for root canal therapy lack control over solution ejection direction, resulting in uncontrolled irrigant flow, low speed, and safety concerns due to the imbalance between internal and external pressures, which complicates effective disinfection and sealer placement.
Innovation Solution
A manufacturing method for a backflow type irrigation needle tip involves using a laser apparatus to create inclined holes on the needle tip, allowing for precise control over the position, size, and direction of water outlet holes, enabling controlled solution flow and high irrigation pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional open-end or closed-end needle tips are used, then the needle tip structure is simple, but the solution ejection direction cannot be controlled and irrigation pressure is low
Solution Approach 1:
The patent applies asymmetry by forming an inclined hole in the needle tip wall at a specific angle (10°-90° relative to the needle axis) rather than using symmetric perpendicular holes. This asymmetric hole orientation creates a directional flow path that controls solution ejection direction while maintaining a relatively simple needle tip structure without requiring multiple separate components
2Ease of operation
If a flow guide barrier is designed and machined on the needle tip, then solution ejection direction can be controlled, but the needle tip becomes difficult to machine due to rigid material and small size
Solution Approach 1:
The patent replaces traditional mechanical machining methods with laser processing technology. The laser beam can precisely form inclined holes in the rigid needle tip material without requiring complex mechanical tooling or multi-step machining operations, significantly simplifying the manufacturing process while achieving the same flow direction control function
Solution Approach 2:
The patent changes the manufacturing approach from mechanical removal to laser-based energy processing. By using laser parameters (power, pulse duration, focal spot size) to control hole formation, the process becomes more adaptable to small dimensions and rigid materials, improving ease of manufacture while maintaining precision
3Productivity
If conventional needle tips are used, then the structure is simple, but irrigation speed is low and cleaning efficacy is insufficient
Solution Approach 1:
The patent introduces a new dimensional element by creating an inclined hole that extends through the needle wall at an angle, rather than using simple perpendicular side holes or end openings. This three-dimensional hole configuration creates a more effective flow path that increases irrigation speed and cleaning efficacy while adding only minimal structural complexity
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 method enables precise control over solution flow, increasing irrigation pressure and speed, improving cleaning efficacy within the root canal, reducing the risk of sealer entry into the body, and enhancing therapy outcomes by ensuring safe and efficient irrigation and disinfection.
Implementation Method 1
a hole is punched on the irrigation needle tip through a laser apparatus
Data Source
AI summary
The disclosure provides a manufacturing method for a backflow type irrigation needle tip, and a backflow type irrigation needle tip. In the manufacturing method, a pointed portion of the irrigation needle tip is a closed end. The method includes: setting a laser parameter of the laser apparatus, where the laser parameter includes a repetition frequency, single pulse energy, and a focal spot size; setting a diameter parameter of a laser machining trajectory; adjusting a laser beam for aiming to a designated portion of the irrigation needle tip to be machined, and adjusting a direction of the laser beam and an axial direction of the irrigation needle tip to form an angle, where a range of the angle α is 10°≤α<90°; and activating the laser apparatus, and forming an inclined hole towards the closed end on a pipe wall of the irrigation needle tip.