Tooth-Straddling RF Electrode Unit for Interproximal Cleaning
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Solution Overview
Problem
Existing RF-based oral cleaning and treatment devices struggle to effectively clean interproximal spaces between teeth due to the limitations of traditional dielectric barriers and electrode configurations.
Innovation Solution
The device incorporates protruding structures with electrodes that allow a tooth to act as an insulating barrier, positioning the electrodes closer to interproximal spaces, enabling RF energy to flow naturally through these areas for enhanced cleaning, and includes a sensing mechanism to adjust cleaning functions based on detected dental features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional dielectric barriers are used to separate RF electrodes, then the device structure is simple, but the cleaning efficacy in interproximal spaces is insufficient
Solution Approach 1:
The cleaning unit is divided into multiple protruding structures, each containing RF electrodes. These segmented structures can be independently positioned to straddle individual teeth, allowing the RF field to be focused on specific interproximal spaces while maintaining overall system simplicity
Solution Approach 2:
The invention transitions from a planar electrode arrangement to a three-dimensional configuration where protruding structures extend outward from the cleaning unit surface. This dimensional change allows electrodes to reach into interproximal spaces that are inaccessible to traditional flat electrode designs
2Reliability
If electrodes are positioned closer to interproximal spaces, then cleaning efficacy improves, but the risk of RF energy affecting non-target areas increases
Solution Approach 1:
The tooth itself serves as an intermediary dielectric barrier between the RF electrodes. By positioning electrodes on opposite sides of the tooth, the tooth's natural insulating properties confine the RF field to the interproximal spaces, preventing energy from affecting non-target areas while enhancing local cleaning efficacy
Solution Approach 2:
The tooth structure is utilized as its own protective barrier against RF energy. The natural dielectric properties of enamel and dentin automatically regulate RF field distribution, eliminating the need for additional protective structures and simplifying the device design
3Reliability
If a dielectric barrier is placed between RF electrodes, then RF field distribution is controlled, but the cleaning action at the brush level is reduced
Solution Approach 1:
The invention removes the traditional dielectric barrier from between the RF electrodes and allows the tooth structure itself to serve this function. This extraction of the barrier element enables direct contact between brush bristles and tooth surfaces while maintaining RF field control through the tooth's natural properties
Solution Approach 2:
The invention merges the mechanical cleaning function of brush bristles with the RF field cleaning function by positioning both in close proximity to the interproximal spaces. The protruding structures integrate electrode placement with brush positioning, allowing simultaneous mechanical and RF cleaning action
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
This configuration improves cleaning efficacy in interproximal spaces and allows for adaptive cleaning actions, enhancing the overall cleaning and treatment capabilities of the device.
Implementation Method 1
The signal generator drives the electrodes with an RF signal which causes an RF field to be generated around and between the electrodes. When the RF field interacts with surfaces of the teeth and gums, it provides a cleaning function by loosening the bonds between impurities and the surfaces in the mouth.
Implementation Method 2
The dielectric barrier has a height which extends up to the level of the distal tips of the brush bristles. The barrier forces RF waves transmitted between the electrodes to travel over the top of the barrier, thus reaching the area where the bristles engage with the surfaces of the teeth and gums in use.
Data Source
Figure 1a~3
Figure 4a~7
Figure 8a~12
AI summary
An oral cleaning unit, e.g. a head for an oral cleaning and/or treatment device, includes electrodes for generating an RF field for providing an oral cleaning and/or treatment function. The unit includes at least a first and second protruding structure, which protrude in a same general direction away from a base or support structure. Each comprises one or more electrodes. The protruding structures are arranged facing one another and separated by a space or gap which is configured so as to be able to receive a tooth pushed or inserted therein between the first and second protruding structures, and with the protruding structures extending on either side of the tooth, i.e. straddling the tooth. This allows the RF electrodes comprised by the protruding structures to reach to a location at least part way down side faces of the tooth, closer to interproximal spaces, enabling interproximal spaces to be better cleaned, and optionally also to be sensed using RF energy/fields interacting with dental features, when the electrodes are suitably driven by an RF signal.