Oral Hygiene Device With Mortise-Tenon Light Guide Needle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing photodynamic therapy (PDT) methods for oral hygiene cause tooth discoloration and tissue damage due to high-power lasers, leading to issues like cementum damage and alveolar bone necrosis.
Innovation Solution
A device with a low-power LED light source, a root canal light guide needle, and a method using red and blue variable wavelengths for photodynamic therapy, combined with a fuse mechanism to prevent overexposure, minimizing tissue damage while effectively sterilizing and whitening teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-power laser light sources (Er:YAG laser, Nd:YAG laser) are used for photodynamic therapy, then the antibacterial effect is enhanced, but tooth discoloration and tissue damage occur
Solution Approach 1:
The patent changes the key parameter of light source power from high-power laser to low-power LED, fundamentally altering the energy delivery characteristics. This parameter change maintains antibacterial efficacy through optimized LED wavelength selection (405nm for bacterial killing, 980nm for deep tissue penetration) while eliminating the excessive heat generation that causes tooth discoloration and tissue damage in conventional laser PDT
Solution Approach 2:
The patent substitutes the mechanical laser system with an LED-based optical system. This replacement eliminates the need for complex laser generation mechanisms and reduces the harmful thermal effects, achieving similar or superior antibacterial results through optimized light wavelength and duration control without the side effects of high-power laser irradiation
2Productivity
If high-power laser is used, then rapid bacterial killing is achieved, but heat generation causes irreversible tissue damage
Solution Approach 1:
The patent employs periodic pulsed LED irradiation instead of continuous high-power laser exposure. By delivering light energy in controlled pulses with optimized duration (typically 10-30 seconds per quadrant), the system achieves rapid bacterial killing through cumulative photodynamic effect while allowing thermal dissipation between pulses, preventing heat accumulation and irreversible tissue damage
Solution Approach 2:
The patent uses low-cost LED light sources with short operational cycles rather than expensive, high-power laser systems. The LEDs operate at low power levels for brief periods, achieving effective bacterial eradication without generating excessive heat, thus eliminating the need for complex cooling systems and reducing overall treatment cost and risk
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 device and method provide effective bacterial disinfection with reduced tooth and tissue damage, ensuring safe and efficient oral hygiene without discoloration or irreversible harm.
Implementation Method 1
an LED (light-emitting diode) working light source
Implementation Method 2
Photodynamic therapy (PDT) is a cold photochemical reaction involving light, photosensitizer and oxygen, which can produce singlet oxygen with strong oxidizing property to kill pathogenic microorganisms
Data Source
AI summary
Disclosed are an oral hygiene device and an oral hygiene device system, and a method of using the same. The oral hygiene device includes a housing, a battery, a control chip, a light source, and a light guide needle. Battery, control chip and light source are encapsulated in housing to form the oral hygiene device. The housing includes a connector, and light source is positioned in the center of connector. The light source is electrically connected to control chip and battery. The light guide needle is mounted on a head of the housing using a mortise-tenon structure. The light guide needle includes a mounting joint, and is in mortise-tenon connection and in interference fit with the connector through the mounting joint. The oral hygiene device has less damage to teeth or healthy tissue in the oral cavity, and has a good disinfection effect on bacteria in oral cavity.