An oral cleaning method and device suitable for preventing and treating dental caries in children

Abstract

The application discloses an oral cavity cleaning method and device suitable for preventing and treating dental caries of children. The method comprises the following steps: a spray head is connected with a main body module through a magnetic suction interface, the adsorption force of the magnetic suction interface is 5+ / -0.5 N; a basic cleaning gear is selected; the fluoride content in local water and the plaque coverage rate on the surface of the teeth of a user are detected; the final execution cleaning parameters are calculated according to the basic cleaning gear and the fluoride content in water and the plaque coverage rate; when the occlusal pressure is detected to be greater than or equal to 2 N, cleaning is performed according to the final execution cleaning parameters; after the cleaning time reaches, the plaque coverage rate is detected again, if the plaque coverage rate does not reach the standard, the optimized re-cleaning is performed according to the strengthened cleaning parameters, and then the plaque coverage rate is detected again until the standard is reached or an alarm is given after the maximum number of cycles is reached; the safety parameters are monitored in real time, and if any safety parameter exceeds the threshold, the device is immediately stopped and an alarm is given. The application can customize a personalized cleaning scheme according to the individual differences and regional characteristics of the user, protect the teeth of children and improve the effect of preventing and treating dental caries.

Description

Technical Field

[0001] This invention belongs to the field of oral hygiene technology, specifically relating to an oral hygiene method and device suitable for the prevention and treatment of dental caries in children. Background Technology

[0002] Oral health is a crucial foundation for children's growth and development; however, the problem of dental caries among children in my country is becoming increasingly prominent. According to the recent Fourth National Oral Health Epidemiological Survey, the prevalence of dental caries among children nationwide remains high, especially among 5-year-old children, with an average prevalence of 71.9% in primary teeth, and 9.8% higher in rural areas than in urban areas. Besides dietary management, habit correction, and fissure sealing, daily scientific cleaning is a key aspect of preventing and controlling dental caries in children.

[0003] Currently, the mainstream children's dental cleaning tools on the market mainly include traditional manual toothbrushes, electric toothbrushes for children, and water flossers for children. However, all of them have the following drawbacks: Traditional manual toothbrushes are inefficient at cleaning and highly dependent on the user's skills. Children often struggle to master the correct brushing technique and duration, resulting in insufficient cleaning of hard-to-reach areas such as between teeth and the gingival sulcus. Furthermore, the hardness and pressure of the bristles are difficult to control, posing a risk of gum damage and enamel abrasion. In addition, they lack safety protection mechanisms and cannot effectively prevent tooth decay.

[0004] While electric toothbrushes for children improve efficiency and offer some force control through high-frequency vibration, the physical shape of the brush head remains unchanged, making it impossible to effectively clean the interproximal spaces. For children wearing orthodontic braces, electric toothbrushes cannot clean complex hard-to-reach areas such as around the brackets and under the wires.

[0005] Children's water flossers clean teeth using direct pressure water flow, which can reduce blind spots to some extent. However, their water flow parameters are fixed and cannot be adapted to the oral characteristics of children at different developmental stages. Specifically: Individual differences that do not match the level of cleaning: The rate and area of ​​plaque buildup vary among children, and the level of cleaning varies for the same child at different times. When using fixed water flow parameters, the cleaning intensity does not change with real-time feedback such as plaque coverage, resulting in insufficient or excessive cleaning. Age and developmental differences that do not match the needs: Children aged 3-6 have thin enamel, low mineralization, and delicate gums, requiring gentle cleaning; children aged 6-12 are in the mixed dentition period, with large gaps between teeth, easy food impaction, and a high incidence of cavities, requiring intensive cleaning of the interproximal surfaces; adolescents aged 12-18 who are undergoing orthodontic treatment require special cleaning of the area around the brackets, while those who are not undergoing orthodontic treatment only need routine cleaning. Ignoring the influence of regional environmental factors: Children in high-fluoride areas have enamel hypoplasia (fluorosis) and cannot withstand excessively high water pressure; children in low-fluoride areas are prone to tooth decay and need to ensure sufficient cleaning power.

[0006] Therefore, existing children's dental cleaning tools generally suffer from a "one-size-fits-all" problem, failing to recognize individual differences among users (such as age, orthodontic status, and degree of cleaning) and regional characteristics (such as water fluoride content), and thus failing to provide customized and personalized cleaning solutions. This results in poor applicability and inconsistent effectiveness in preventing and treating dental caries in children. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and propose an oral cleaning method and device suitable for the prevention and treatment of dental caries in children. It can customize personalized cleaning plans according to individual differences and regional characteristics of users, thereby improving the effectiveness of dental caries prevention and treatment.

[0008] To achieve the above objectives, the present invention proposes the following technical solution: An oral hygiene method suitable for the prevention and treatment of dental caries in children includes the following: (1) The nozzle is connected to the main module via a magnetic interface. The magnetic interface has an adsorption force of 5±0.5N. This force ensures that children cannot easily pull it off by themselves to prevent accidental swallowing. At the same time, adults can easily separate it, taking into account both safety and convenience. (2) Select the basic cleaning setting that corresponds to the user's age and orthodontic condition; (3) Test the fluoride content in local water and the plaque coverage on the user's teeth; (4) Calculate the final cleaning parameters based on the basic cleaning parameters corresponding to the basic cleaning level, the fluoride content in the water, and the plaque coverage on the user's teeth. (5) When the biting pressure is detected to be ≥2N, oral cleaning is performed according to the final cleaning parameters, and wastewater is recycled in real time; (6) After the cleaning time is reached, the plaque coverage rate is checked again. If the cleaning qualification standard is not met, the cleaning is optimized and re-cleaned according to the enhanced cleaning parameters, and then checked again until the standard is met or the maximum number of cycles is reached, and then an alarm is triggered. (7) Monitor safety parameters in real time throughout the process. If any safety parameter exceeds the threshold, stop immediately and alarm.

[0009] Preferably, the basic cleaning settings include three settings: a primary tooth setting, a mixed tooth setting, and an orthodontic setting. The primary tooth setting is suitable for users aged 3-6 years, providing them with a gentle cleaning solution. The mixed tooth setting is suitable for users aged 6-12 years and 12-18 years who have not undergone orthodontic treatment, providing them with a balanced cleaning solution. The orthodontic setting is suitable for users aged 12-18 years who wear braces, providing them with a deep cleaning solution.

[0010] Preferably, the basic cleaning parameters corresponding to each gear level include water flow scattering angle and basic pressure. Fundamental frequency Basic duration and the corresponding maximum safety thresholds for each item. , , The specific settings are shown in Table 1: Table 1 Basic cleaning parameters for each gear level

[0011] Preferably, the method further includes mixing water and dental cleaning agent in a specific ratio to form a cleaning liquid stream, wherein the basic cleaning parameters also include a basic mixing ratio of water and cleaning agent. and its minimum safety threshold The specific settings are shown in Table 1.

[0012] For children aged 3-6, all teeth are primary teeth. The enamel thickness of primary teeth is only half that of permanent teeth, with low mineralization, delicate and sensitive gums, fewer teeth, and short attention spans. They are prone to "baby bottle caries" and the caries progresses rapidly. Cleaning requires absolute gentleness and safety to avoid damage to the fragile enamel and gums. A vortex-shaped water flow with a 15° scattering angle creates a spiral column, concentrating energy and relying on the fluid shear force generated by the water flow rotation to achieve a "wrap-around scrubbing" of the tooth surface, avoiding direct impact on the enamel. 0.3 MPa is the safe tolerance threshold for primary tooth enamel and gums, effectively removing plaque without causing abrasion. The Hz base frequency provides gentle perturbation, assisting in cleaning rather than strong impact, ensuring comfort and safety during use; common sense in oral medicine indicates that effective cleaning of all teeth requires 2-3 minutes. For the primary teeth setting, the base duration is 180 seconds, which achieves basic cleaning effect and is suitable for children's patience at this stage; the mixing ratio of water and detergent is 18-22:1, which reduces the irritation of detergent to enamel and gums while ensuring cleaning needs are met.

[0013] For children aged 6-12, who are in the mixed dentition stage, tooth crown heights vary and gaps between teeth widen; caries is characterized by a high incidence of interproximal caries and misalignment of teeth; the cleaning requirement is efficient cleaning of interdental spaces while also cleaning the gingival sulcus and tooth surfaces at different heights; a diffusion angle of 22° causes the water flow to fan out, covering the cusp slopes and penetrating the interproximal spaces, effectively removing food debris and plaque from between teeth; studies have shown that 0.3-0.6 MPa is the effective pressure range for cleaning interproximal surfaces. 0.5 MPa provides sufficient kinetic energy to deliver water deep into the gaps between teeth and break down the sticky plaque biofilm formed by carbohydrate metabolism. 20 Hz can clean gingival inflammation secretions that may exist during the mixed dentition period through the intermittent impact of water flow. The basic duration of 300 seconds is the golden standard duration, which can ensure that the increased number of teeth and the widening gaps between teeth are thoroughly cleaned. The mixing ratio of water and detergent is 10~12:1, which is the standard ratio. The synergistic effect of detergent at the standard concentration and 0.5 MPa water pressure can effectively prevent interproximal caries.

[0014] For orthodontic users aged 12-18, fixed braces (brackets, wires, etc.) create numerous complex blind spots on the tooth surface (such as around the brackets and under the archwire); caries is characterized by a high risk of enamel demineralization (white spots) around the brackets and even secondary caries; the cleaning requirement is to overcome these blind spots, necessitating thorough cleaning of complex areas such as around the brackets and the gingival margin; a wide-angle 40° scattering angle maximizes coverage, bypassing the braces and reducing cleaning blind spots; 0.8 MPa can overcome the resistance of the brackets and wires, allowing the water flow to powerfully flush around and under the attachments, removing retained plaque and food debris; and studies have shown that pressures of 0.7-0.9 MPa can effectively clean the proximal surfaces of the brackets; 50 Hz high-frequency pulsed water flow can generate cavitation effect and stronger fluid shear force, destroying the biofilm tightly adhered to the bracket base. The pulsed impact can more effectively tear off plaque, and the intermittent water flow gives the gums more recovery time, resulting in a better experience. For orthodontic treatment, the basic duration is 420 seconds, which is a necessary time investment to cope with the extremely complex cleaning environment and eliminate cleaning dead spots. The water and detergent mixing ratio is 5~8:1, which is a high concentration ratio. The 0.8Mpa high-pressure water flow still has limitations in the face of complex orthodontic appliance structures, and chemical antibacterial methods need to be strengthened. The high concentration of detergent can prolong its residence time on the surface and enhance its effect to overcome cleaning dead spots.

[0015] For users aged 12-18 who are not wearing braces, compared to users who are wearing braces, the number of teeth is basically the same, the arrangement is relatively neat, there are fewer blind spots to clean, and the cleaning difficulty is not high. Therefore, the basic cleaning setting corresponding to the replacement tooth setting can meet the cleaning needs.

[0016] Preferably, the final cleaning parameters include water flow scattering angle and final cleaning pressure. Final execution frequency Final execution time And the final mixing ratio of water and cleaning agent. The calculation method is as follows: ; ; ; ; in, This is the fluorine content adjustment factor. It depends on the fluoride content in the water. This is the adjustment coefficient for plaque coverage. The final cleaning parameters are determined based on the plaque coverage on the user's teeth; the water flow scattering angle is consistent with the basic cleaning setting and is not adjusted.

[0017] The final calculation formula for cleaning parameters is based on an intelligent balance between safety and efficiency. Water flow pressure is primarily related to the fluoride content of the region, setting an insurmountable safety baseline for different glaze conditions to prevent physical damage. Pulse frequency and cleaning duration dynamically respond to real-time plaque levels, serving as the core adjustment lever to improve cleaning efficiency. The detergent concentration is uniquely controlled by the dual synergistic regulation of fluoride content and plaque coverage, automatically enhancing chemical antibacterial efficacy in high-risk situations. The dynamic adjustment of all parameters is strictly limited within preset safety thresholds, thereby achieving truly personalized and precise cleaning while ensuring absolute safety.

[0018] Specifically, the formula for calculating the final mixing ratio of purified water and detergent is designed to realize the cross-coupled influence of environmental risk (fluoride content level) and individual condition (plaque coverage) on detergent concentration. The fluoride content adjustment coefficient and plaque coverage adjustment coefficient are converted into multiplicative factors, which allows the concentration to be increased under high-risk conditions and decreased under low-risk conditions. The multiplication of the two factors achieves a synergistic amplification or reduction effect of the two risks, making the ratio adjustment more accurately meet clinical needs, while not falling below the minimum safe threshold for the water-to-detergent mixing ratio.

[0019] The The possible values ​​are as follows: If the fluoride content in the water is ≥1.0 mg / L, it is considered a high-fluoride area. It is used to reduce water flow pressure and detergent concentration to prevent impact damage and excessive friction to existing fluorosis or fragile enamel. If the fluoride content in the water is ≥0.3 mg / L and <1.0 mg / L, it is considered a medium fluoride zone. Maintain the basic pressure and basic water to detergent ratio settings; If the fluoride content in the water is <0.3 mg / L, it is considered a low-fluoride area. Appropriately increase the pressure and detergent concentration to enhance the cleaning effect and chemical antibacterial efficacy, and make up for the insufficient anti-caries ability of enamel in a low-fluoride environment.

[0020] The The possible values ​​are as follows: If the plaque coverage is ≥50%, then plaque accumulation is severe. Increase the pulse frequency, extend the cleaning time, and increase the concentration of cleaning agent to increase cleaning intensity and chemical antibacterial efficacy, and thoroughly remove stubborn plaque; If the plaque coverage is ≥20% and <50%, the plaque condition is normal. Maintain the basic frequency, duration, and water-to-cleaning agent ratio; If the plaque coverage is less than 20%, the plaque condition is good. By reducing the frequency, shortening the cleaning time, and lowering the concentration of cleaning agents, energy can be saved while ensuring basic cleaning, and over-cleaning can be avoided and the oral flora balance can be maintained.

[0021] Preferably, the cleaning qualification standard is: the coverage rate of bacterial plaque after cleaning is less than a preset value; wherein, the preset value is set to 8~10%.

[0022] Dental plaque is a direct cause of dental caries. Plaque coverage rate has a clear dose-response relationship with the incidence of dental caries. The plaque index is widely used in oral clinical practice for quantitative assessment and has been incorporated into the dental caries risk assessment system. It is a recognized indicator for evaluating cleaning effectiveness and can be detected non-invasively, rapidly, and in real time using optical sensors. Therefore, this invention uses plaque coverage rate as a closed-loop feedback indicator.

[0023] Preferably, the enhanced cleaning parameters include water flow scattering angle and enhanced execution pressure. Increase execution frequency Strengthen execution time And the enhanced mixing ratio of water and cleaning agents. The calculation method is as follows: ; ; ; ; Among them, the water flow scattering angle in the enhanced cleaning parameters is the same as that in the basic cleaning setting and will not be adjusted. The plaque coverage enhancement adjustment factor is determined based on the plaque coverage after cleaning; if the plaque coverage after cleaning is ≥20%, then... This indicates severe plaque buildup, requiring significantly enhanced cleaning; if the plaque coverage after cleaning is <20% but greater than the preset value, then... This indicates that the plaque condition is not up to standard and requires more thorough cleaning.

[0024] The pressure in the final cleaning parameters is only affected by the fluoride content adjustment factor. Since children's mouths are sensitive to pressure, to avoid excessive impact on enamel and gums, the pressure is not further increased during optimized cleaning. The enhanced cleaning pressure is the same as the final cleaning pressure. The enhanced cleaning frequency is increased based on the base frequency to enhance the pulsating effect of the water flow and better remove stubborn plaque. The enhanced cleaning duration is increased based on the base duration to ensure more thorough cleaning and cover any potentially missed areas. The enhanced cleaning mixing ratio is reduced based on the base mixing ratio, i.e., the detergent concentration is increased to enhance the chemical antibacterial effect and work in conjunction with the high-frequency water flow to overcome cleaning dead spots.

[0025] Preferably, the safety parameters include: the magnetic attraction distance between the nozzle and the main module, the tilt angle of the device, the real-time water pressure and the biting force. The safety thresholds include: the magnetic attraction distance is greater than 2mm, the tilt angle of the device is greater than 30°, the real-time water pressure is greater than the maximum safety threshold, and the biting force disappears for a duration greater than 0.5s. If any of the above conditions are met, the operation will stop immediately and an audible and visual alarm will be issued.

[0026] Preferably, if the water quality sensor detects that the fluoride content in the water is greater than 2.0 mg / L, the MCU will forcibly lock the deciduous teeth setting while alerting the user to prevent any potential risks.

[0027] Another object of the present invention is to provide an oral cleaning device suitable for the prevention and treatment of dental caries in children, for implementing the above-mentioned method, the device comprising the following parts: The nozzle has an outlet for spraying cleaning fluid and a back suction port for recycling wastewater; the front end of the nozzle integrates a plaque sensor for monitoring plaque coverage on the tooth surface and a bite force sensor for detecting the user's bite pressure. The main module is detachably connected to the nozzle via a magnetic interface equipped with an electromagnet drive circuit. Internally, it integrates a multi-mode cleaning module, a negative pressure recovery module, a speed selection module, and a water quality testing chamber. The multi-mode cleaning module generates and sprays a pressurized, proportionally mixed cleaning fluid stream with a specific scattering angle through the nozzle outlet. The negative pressure recovery module generates negative pressure through the suction port to recover wastewater and oral residue generated in the mouth. The speed selection module has at least three speeds: a deciduous teeth speed, a mixed teeth speed, and an orthodontic speed, for user selection. The water quality testing chamber is located on the side wall of the main module's outer shell. It contains a built-in water quality sensor to detect the fluoride content in local water samples and has a water inlet for injecting the water sample to be tested. The intelligent control module includes a microcontroller unit (MCU) as the control center. The input terminals of the MCU are connected to the gear selection module, the bite force sensor, the plaque sensor, and the water quality sensor, respectively, to receive gear selection signals, bite pressure signals, plaque coverage data, and fluoride content data in the water. The output terminals of the MCU are connected to the multi-mode cleaning module, the negative pressure recovery module, and the electromagnet drive circuit, respectively, to output control commands to adjust the cleaning parameters of the cleaning fluid flow, including pressure, frequency, duration, scattering angle, and the water-to-detergent mixing ratio, and to control the start and stop of the negative pressure recovery module and the adsorption state of the magnetic interface.

[0028] Preferably, the magnetic interface includes a magnetic plate on the nozzle and an electromagnet base on the main module. Both the magnetic plate and the electromagnet base are covered with a food-grade silicone layer. The electromagnet base is controlled by an electromagnet drive circuit. After being energized, the electromagnet base generates a magnetic field that attracts the magnetic plate. Its attraction force is precisely controlled at 5±0.5N, achieving the dual functions of preventing accidental swallowing by children and easy disassembly by adults.

[0029] The magnetic accumulator and the electromagnet base form a magnetic interface, and the electromagnet base is controlled by an electromagnet drive circuit, which is existing technology.

[0030] Preferably, an elastic connecting rope is provided between the nozzle and the main module, which is stored inside the main module during normal use and serves as a final physical protection against accidental swallowing when the nozzle is accidentally separated from the main module.

[0031] Preferably, the bite force sensor is integrated into the bite surface of the nozzle, i.e., the upper and lower surfaces of the nozzle, and triggers a signal when the pressure is ≥2N.

[0032] The bite force sensor uses a miniature thin-film pressure sensor, which is a current technology.

[0033] Preferably, the plaque sensor is disposed on the side of the front end of the nozzle, located on one side of the nozzle outlet, with the sensing surface of the plaque sensor facing outwards from the nozzle, for detecting the plaque coverage on the tooth surface.

[0034] The plaque sensor uses a miniature optical sensor and employs laser fluorescence detection. It quantitatively analyzes the coverage by detecting the fluorescence characteristics of dental plaque under specific light excitation, which is an existing technology in the field of oral healthcare.

[0035] Preferably, the multi-mode cleaning module includes a cleaning chamber, a liquid pump unit, a magnetic levitation motor, a pressurized water flow channel, and a vortex generator connected in sequence. The cleaning chamber includes a water purification chamber and a cleaning agent chamber that are physically isolated from each other. The water purification chamber is used to store cleaning water, and the cleaning agent chamber is used to store dental cleaning agent. The liquid pump unit includes a water purification extraction pump placed in the water purification chamber and a cleaning agent extraction pump placed in the cleaning agent chamber, used to accurately extract water and cleaning agent according to a preset ratio. The magnetic levitation motor is used to receive the mixed liquid flow delivered by the liquid pump unit and pressurize it, and deliver it to the vortex generator through the pressurized water flow channel. The vortex generator receives the pressurized liquid flow from the magnetic levitation motor and, through its internal adjustable-angle guide vane assembly, transforms the direct liquid flow into a rotating or diffused cleaning liquid flow with a specific scattering angle, which is finally ejected from the nozzle. The vortex generator provides at least three scattering angle modes of 15°, 22°, and 40°, corresponding to the deciduous tooth mode, the mixed tooth mode, and the orthodontic mode, respectively.

[0036] The use of the cleaning chamber, liquid pump unit, magnetic levitation motor, pressurized water flow channel and vortex generator here is existing technology.

[0037] The dental cleaning agents mentioned above are existing technologies, and any dental cleaning agents available on the market or disclosed in existing patents are acceptable.

[0038] Preferably, the negative pressure recovery module includes a negative pressure recovery pump, a wastewater tank, and a negative pressure recovery channel connecting the back suction port and the wastewater tank. The negative pressure recovery channel is equipped with a one-way solenoid valve to prevent wastewater backflow. The negative pressure recovery pump is located at the back suction port to generate negative pressure at the back suction port and suck the wastewater and oral residue generated after cleaning into the wastewater tank. The wastewater tank is preferably made of transparent polycarbonate material for visual management of water volume and has a built-in 0.1mm stainless steel filter screen to filter out larger solid residues.

[0039] Preferably, the water quality testing chamber is located on one side of the wastewater tank, below the gear selection module, and the water quality testing chamber is detachably connected to the outer wall of the wastewater tank for easy cleaning; the water inlet is equipped with a flip cover with a sealing ring.

[0040] Preferably, the intelligent control module further includes a Hall sensor, a gyroscope, and a pressure sensor. The Hall sensor is located at the magnetic interface and is used to monitor the magnetic distance between the magnetic plate and the electromagnet base. The gyroscope is located on the main module and is used to monitor the attitude and angle of the device to determine whether abnormal tilting or inversion has occurred. The pressure sensor is located on the pressurized water flow channel and is used to monitor the pressure of the water flow output by the magnetic levitation motor. The Hall sensor, the gyroscope, the pressure sensor, the plaque sensor, the bite force sensor, and the water quality sensor are collectively referred to as the sensor group, which is connected to the input terminal of the MCU. The intelligent control module also includes an execution group, which includes drivers for driving the water purification pump and the detergent extraction pump, a motor driver for driving the magnetic levitation motor, a guide plate control motor for controlling the angle of the guide plate, a driver for driving the negative pressure recovery pump, an electromagnet drive circuit for controlling the on / off state of the electromagnet base and the magnetic force, and an audible and visual alarm (LED light and buzzer) for alarm purposes. The execution group is connected to the output terminal of the MCU.

[0041] The MCU mentioned above is existing technology. The sensor group, gear selection module, and actuator group are also existing technologies. The connection and use of the MCU with these components are existing technologies.

[0042] The water quality sensor is a fluoride ion selective electrode, and its sensitive element is a lanthanum fluoride single-crystal film. It adopts the principle of potential measurement. When the electrode is immersed in the water sample to be tested, the potential signal generated by the electrode is linearly related to the logarithm of the fluoride ion activity in the water. The fluoride ion selective electrode is electrically connected to the MCU, and the detected potential signal is processed by the signal conditioning circuit and converted into a fluoride content value. In order to reduce the influence of temperature on the detection results, the fluoride ion selective electrode preferably has a built-in temperature sensor. The MCU performs temperature compensation correction on the detection results based on the feedback from the temperature sensor. After the user injects water sample into the water quality testing chamber, the electrode can be directly immersed in the water sample to complete the detection. The response time is 10~30 seconds, which is the existing technology.

[0043] Preferably, the microcontroller unit has built-in safety monitoring and control logic, specifically: the MCU receives data from the Hall sensor, gyroscope, pressure sensor and bite force sensor, and determines whether the magnetic attraction distance is greater than 2mm, whether the device tilt angle is greater than 30°, whether the real-time water pressure is greater than the maximum safety threshold, and whether the bite force disappears and lasts for more than 0.5s. If any one of these four conditions is met, the MCU immediately sends a stop command to the execution group and triggers an audible and visual alarm.

[0044] Preferably, the microcontroller unit incorporates personalized cleaning mode decision-making and execution logic, specifically: the MCU receives signals from the gear selection module to determine basic cleaning gear parameters, then determines the fluoride content adjustment coefficient based on water quality sensor data and adjusts the basic pressure, determines the plaque coverage adjustment coefficient based on plaque sensor data and adjusts the basic frequency, basic duration, and water-to-detergent mixing ratio to determine the final cleaning parameters; the MCU controls the motor driver to adjust the power and frequency of the magnetic levitation motor, controls the guide vane adjustment angle, and controls the drivers of the water extraction pump and detergent extraction pump to ensure that water and detergent are mixed in a specified ratio; the MCU has a built-in timer to control the total duration; after the initial cleaning duration is reached, the MCU receives the plaque coverage rate after cleaning from the plaque sensor. If the cleaning qualification standard is not met, the enhanced cleaning parameters are calculated based on the plaque coverage rate after cleaning, and the enhanced cleaning parameters are used for optimization and re-cleaning before re-inspection, until the standard is met or the maximum number of cycles is reached, at which point an alarm is triggered.

[0045] The beneficial effects of this invention are as follows: This invention is the first to integrate three major factors—user age / orthodontic status, regional water fluoride content, and real-time oral plaque status—into a cleaning parameter decision system. Through intelligent algorithms, it automatically generates a truly customized cleaning plan for each individual, completely changing the shortcomings of existing products that apply a "one-size-fits-all" approach and greatly improving the targeting and effectiveness of caries prevention and treatment.

[0046] This invention is tailored to the oral characteristics of different developmental stages (fragile deciduous teeth, large gaps between teeth during the mixed dentition period, and many blind spots during orthodontic treatment) by customizing three basic modes of water flow scattering angle, pressure, frequency, duration, and cleaning agent concentration, ensuring that the water flow and active ingredients can accurately cover and effectively clean various key areas (tooth surface, gaps between teeth, gingival sulcus, and around brackets).

[0047] This invention introduces real-time cleaning effect verification and intelligent optimization functions to construct an intelligent closed-loop system of "assessment-cleaning-reassessment," achieving for the first time the objective quantification and verification of home oral cleaning effects. It uses plaque sensors to determine whether cleaning is adequate, ensuring reliable caries prevention. Based on residual plaque, it adaptively initiates progressive intensive cleaning, dynamically responding to individual differences and daily fluctuations to improve efficiency. Simultaneously, all optimization parameters are constrained within preset safety thresholds, pursuing high efficiency while eliminating the risk of over-cleaning. Completion prompts enhance children's compliance, ultimately achieving a significant technological leap from providing the cleaning process to guaranteeing cleaning results.

[0048] This invention employs multiple active safety protection mechanisms, including magnetic anti-swallowing, posture monitoring, pressure monitoring, and bite detection. It can immediately stop working and sound an alarm in the event of any abnormality, minimizing the physical damage (such as gum damage and enamel abrasion) and accidental risks (such as choking and swallowing) that may occur during children's use. Its strategy for dealing with extreme environmental parameters (such as ultra-high fluoride) embodies the ultimate safety concept.

[0049] This invention uses real-time negative pressure to recycle wastewater, avoiding the choking and discomfort that may be caused by traditional water flossers, making it more acceptable to children. The visualized wastewater tank makes it easy for parents to manage.

[0050] By adopting the above solution, the present invention can customize a personalized cleaning solution based on the individual differences and regional characteristics of the user, which is suitable for most children and improves the prevention and treatment of tooth decay while protecting children's teeth. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a schematic diagram of the overall structure of the oral cleaning device provided by the present invention.

[0053] Figure 2 This is a control principle diagram of the intelligent control module in the device provided by the present invention.

[0054] Figure 3 This is a flowchart of the method provided by the present invention.

[0055] In the diagram, 1-nozzle, 2-multi-mode cleaning module, 3-cleaning chamber, 4-negative pressure recovery module, 5-magnetic interface, 6-gear selection module, 7-water quality detection chamber, 11-spray outlet, 12-return suction port, 21-vortex generator, 22-pressurized water flow channel, 23-magnetic levitation motor, 31-cleaned water chamber, 32-detergent chamber, 311-cleaned water extraction pump, 321-detergent extraction pump, 41-negative pressure recovery pump, 42-negative pressure recovery channel, 43-one-way solenoid valve, 44-wastewater chamber, 71-water quality sensor, 72-flip cover. Detailed Implementation

[0056] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0057] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0058] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] First embodiment: like Figure 1 As shown, an oral cleaning device suitable for the prevention and treatment of dental caries in children includes a nozzle 1, a main module, and an intelligent control module.

[0061] The nozzle 1 is provided with an outlet 11 and a suction port 12; a plaque sensor and a bite force sensor are integrated at the front end of the nozzle 1; the bite force sensor is integrated on the bite surface of the nozzle, namely the upper and lower surfaces of the nozzle, and triggers a signal when the pressure is ≥2N. The bite force sensor adopts a micro thin-film pressure sensor; the plaque sensor is located on the side of the front end of the nozzle, on one side of the outlet, with the sensing surface of the plaque sensor facing the outside of the nozzle. The plaque sensor adopts a micro optical sensor and uses laser fluorescence detection method.

[0062] The main module is detachably connected to the nozzle 1 via a magnetic interface equipped with an electromagnet drive circuit. The magnetic interface includes a magnetic plate on the nozzle and an electromagnet base on the main module. Both the magnetic plate and the electromagnet base are covered with a food-grade silicone layer. The electromagnet base is controlled by the electromagnet drive circuit. When energized, the electromagnet base generates a magnetic field that attracts the magnetic plate, and its attraction force is precisely controlled within 5±0.5N.

[0063] The main module integrates a multi-mode cleaning module 2, a negative pressure recovery module 4, a gear selection module 6, and a water quality testing chamber 7. The multi-mode cleaning module 2 includes a cleaning chamber 3, a liquid pump unit, a magnetic levitation motor 23, a pressurized water flow channel 22, and a vortex generator 21 connected in sequence. The cleaning chamber 3 includes a water purification chamber 31 and a detergent chamber 32 that are physically isolated from each other. The liquid pump unit includes a water purification extraction pump 311 located in the water purification chamber 31 and a detergent extraction pump 321 located in the detergent chamber 32. The magnetic levitation motor 23 receives the mixed liquid flow delivered by the liquid pump unit and pressurizes it, then delivers it to the vortex generator 21 through the pressurized water flow channel 22. The vortex generator 21 receives the pressurized liquid flow from the magnetic levitation motor 23 and, through its internal adjustable-angle guide vane assembly, transforms the direct liquid flow into a rotating or diffused cleaning liquid with a specific scattering angle. The flow is finally ejected from the nozzle 11; the vortex generator 21 provides at least three scattering angle modes of 15°, 22° and 40°, corresponding to the deciduous tooth mode, the mixed tooth mode and the orthodontic mode respectively; the negative pressure recovery module 4 includes a negative pressure recovery pump 41, a wastewater tank 44 and a negative pressure recovery channel 42 connecting the back suction port 12 and the wastewater tank 44, the negative pressure recovery channel 42 is provided with a one-way solenoid valve 43, and the negative pressure recovery pump 41 is located at the back suction port 12; the gear selection module 6 has at least three gears, including the deciduous tooth mode, the mixed tooth mode and the orthodontic mode, for the user to select; the water quality detection tank 7 has a built-in water quality sensor 71, the water quality detection tank 7 is provided with a water inlet, the water inlet is provided with a flip cover 72 with a sealing ring, the water quality detection tank 7 is located on one side of the wastewater tank 44, below the gear selection module 6, and the water quality detection tank 7 is detachably connected to the outer wall of the wastewater tank 44.

[0064] The intelligent control module includes a microcontroller unit (MCU) as the control center, a sensor group, and an execution group. The sensor group includes a Hall sensor, a gyroscope, a pressure sensor, as well as a bite force sensor, a water quality sensor, and a bacterial plaque sensor. The Hall sensor is located at the magnetic interface 5; the gyroscope is located on the main module; the pressure sensor is located on the pressurized water flow channel 22; the input terminal of the MCU is connected to the sensor group and the gear selection module 6 to receive sensor signals and gear selection signals.

[0065] The execution group includes drivers for the water extraction pump 311 and the detergent extraction pump 321, a motor driver for the magnetic levitation motor 23, a guide vane control motor for controlling the angle of the guide vanes, a driver for the negative pressure recovery pump 41, an electromagnet drive circuit for controlling the on / off state and magnetic force of the electromagnet, and an audible and visual alarm (LED light and buzzer) for alarm purposes. The output of the MCU is connected to the execution group and is used to output control commands to adjust the cleaning parameters of the cleaning liquid flow, including pressure, frequency, duration, scattering angle, and the water-to-detergent mixing ratio, and to control the start / stop of the negative pressure recovery module and the adsorption state of the magnetic interface, such as... Figure 2 As shown.

[0066] Second embodiment: like Figure 3 As shown, an oral cleaning method suitable for preventing tooth decay in children, with the user being a 12-year-old orthodontic child, is described below. The specific workflow is as follows: ①Preparation: Fill the water tank with clean water for washing, add dental cleaning agent to the cleaning agent tank, and connect the nozzle to the main module via the magnetic interface; ② Powering on and selecting: Press and hold the power button to turn on the device. Parents or children can select the orthodontic setting through the setting selection module. ③ Testing: Local water samples were added to the water quality testing chamber. The MCU activated the water quality sensor to detect the fluoride content, which was 0.2 mg / L, indicating a low fluoride level. When a child placed the nozzle in their mouth and gently bit down, the bite force sensor detected a bite pressure of ≥2 N. The plaque sensor scanned the tooth surface and detected a plaque coverage rate of more than 50%. ④ Calculate and clean: The MCU determines the basic cleaning parameters based on the orthodontic settings: water flow scattering angle is 40° wide angle. , , , ; , , , Because the fluoride content is 0.2 mg / L < 0.3 mg / L, Because the plaque coverage is >50%, The final cleaning parameters can be calculated as follows: , , , The MCU performs oral cleaning according to the final cleaning parameters, while simultaneously recycling wastewater in real time. Upon arrival, a second test revealed that the plaque coverage was higher than 20%, which did not meet the standard. The parameters for enhanced cleaning can be calculated as follows: , ,

[0067] The MCU optimizes the cleaning process based on the enhanced cleaning parameters and performs a second inspection. If the plaque coverage rate is found to be lower than the acceptable standard (8%), the cleaning process is complete.

[0068] ⑤ No safety parameters exceeded the limit, and no stop alarm was triggered throughout the entire process.

[0069] Third embodiment: like Figure 3 As shown, an oral cleaning method suitable for preventing tooth decay in children, specifically for 5-year-old children, is described below. ①Preparation: Fill the water tank with clean water for washing, add dental cleaning agent to the cleaning agent tank, and connect the nozzle to the main module via the magnetic interface; ② Power on and selection: Press and hold the power button to turn on the device. Parents or children can select the baby teeth setting through the gear selection module. ③ Testing: Add local water samples to the water quality testing chamber. The MCU activates the water quality sensor to detect the fluoride content. The result is 1.2 mg / L, which is a high fluoride area. When a child puts the nozzle in their mouth and bites it lightly, the bite force sensor detects a bite pressure of ≥2N. The plaque sensor scans the tooth surface and detects that the plaque coverage is between 20% and 50%. ④ Calculate and clean: The MCU determines the basic cleaning parameters based on the baby tooth setting: water flow scattering angle is 15° vortex angle. , , , ; , , , ; Because the fluoride content is 1.2 mg / L > 1.0 mg / L, Because the plaque coverage is between 20% and 50%, The final cleaning parameters can be calculated as follows: , , , The MCU performs oral cleaning according to the final cleaning parameters, while simultaneously recycling wastewater in real time. Upon arrival, the plaque coverage was checked again and found to be below the acceptable standard (8%), at which point the cleaning was completed.

[0070] ⑤ No safety parameters exceeded the limit, and no stop alarm was triggered throughout the entire process.

[0071] Fourth embodiment: like Figure 3As shown, an oral cleaning method suitable for preventing tooth decay in children, with an 8-year-old child as the user, has the following specific workflow: ①Preparation: Fill the water tank with clean water for washing, add dental cleaning agent to the cleaning agent tank, and connect the nozzle to the main module via the magnetic interface; ② Power on and selection: Press and hold the power button to turn on the device. Parents or children can select the replacement setting through the setting selection module. ③ Testing: Add local water samples to the water quality testing chamber. The MCU activates the water quality sensor to detect the fluoride content. The result is 0.8 mg / L, which is in the medium fluoride zone. When a child puts the nozzle in their mouth and bites it lightly, the bite force sensor detects a bite pressure of ≥2N. The plaque sensor scans the tooth surface and detects that the plaque coverage is between 20% and 50%. ④ Calculate and clean: The MCU determines the basic cleaning parameters based on the baby teeth setting: water flow scattering angle is 22° diffusion angle. , , , ; , , , ; Because the fluoride content is 0.8 mg / L < 1.0 mg / L and > 0.3 mg / L, Because the plaque coverage is between 20% and 50%, The final cleaning parameters can be calculated as follows: , , , The MCU performs oral cleaning according to the final cleaning parameters, while simultaneously recycling wastewater in real time. Upon arrival, a second test revealed that the plaque coverage rate did not meet the standard, exceeding the acceptable standard (8%) but falling below 20%. The parameters for one intensive cleaning cycle can be calculated as follows: , , , The MCU performed an optimized re-cleaning based on the enhanced cleaning parameters, and then inspected again. The plaque coverage rate still did not meet the standard, exceeding the acceptable standard (8%) but falling below 20%. If the parameters for the second enhanced cleaning are the same as those for the first enhanced cleaning, then the second enhanced cleaning will be performed according to the parameters for the first enhanced cleaning. If the plaque coverage rate still does not meet the standard after the second enhanced cleaning, but the maximum number of cycles (3 times) has been reached, cleaning cannot be performed again to prevent over-cleaning. At this time, an alarm will be triggered and the problem will be reported to the parents or guardians. The prompt message "Cleaning failed, manual intervention is recommended" will be displayed, and the cleaning data "Plaque coverage rate after cleaning does not meet the standard, maximum number of cycles has been reached" will be provided. The plaque sensor records the location distribution of residual plaque after cleaning, providing reference data for manual intervention.

[0072] As can be seen from Examples 2 to 4, the present invention can adaptively adjust the pressure, frequency, duration and detergent concentration according to different age groups, different regional fluoride contents and different plaque loads, and realize the quantitative verification of cleaning effect through closed-loop control of "evaluation cleaning re-evaluation"; when the plaque does not meet the standard, it automatically performs progressive enhanced cleaning, and after reaching the maximum number of cycles, it alarms and prompts manual intervention, while actively identifying fragile enamel in high fluoride areas and reducing physical and chemical irritation.

[0073] In summary, this invention achieves breakthroughs over existing technologies in terms of personalized parameter adjustment, closed-loop effect verification, progressive enhanced cleaning, and multiple safety protections, significantly improving the targeting and safety of childhood caries prevention and treatment.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oral cleaning method suitable for the prevention and treatment of dental caries in children, characterized in that: Includes the following: (1) The nozzle is connected to the main module via a magnetic interface, wherein the magnetic interface has an adsorption force of 5±0.5N; (2) Select the basic cleaning setting that corresponds to the user's age and orthodontic condition; (3) Test the fluoride content in local water and the plaque coverage on the user's teeth; (4) Calculate the final cleaning parameters based on the basic cleaning parameters corresponding to the basic cleaning level, the fluoride content in the water, and the plaque coverage on the user's teeth. (5) When the biting pressure is detected to be ≥2N, oral cleaning is performed according to the final cleaning parameters, and wastewater is recycled in real time; (6) After the cleaning time is reached, the plaque coverage rate is checked again. If the cleaning qualification standard is not met, the cleaning is optimized and re-cleaned according to the enhanced cleaning parameters, and then checked again until the standard is met or the maximum number of cycles is reached, and then an alarm is triggered. (7) Monitor safety parameters in real time throughout the process. If any safety parameter exceeds the threshold, stop immediately and alarm.

2. The oral cleaning method for preventing and treating dental caries in children according to claim 1, characterized in that: The basic cleaning settings include at least three settings: primary teeth setting, mixed dentition setting, and orthodontic setting; the basic cleaning parameters corresponding to each setting include water flow scattering angle and basic pressure. Fundamental frequency Basic duration and the corresponding maximum safety thresholds for each item. , , .

3. The oral cleaning method for preventing and treating dental caries in children according to claim 2, characterized in that: During the cleaning process, water and dental cleaning agent are mixed in a specific ratio to form a cleaning fluid. The basic cleaning parameters also include the basic mixing ratio of water and cleaning agent. and the minimum safe threshold for the water-to-cleaning-liquid ratio. .

4. The oral cleaning method for preventing and treating dental caries in children according to claim 3, characterized in that: The final cleaning parameters include water flow scattering angle and final cleaning pressure. Final execution frequency Final execution time And the final mixing ratio of water and cleaning agent. The calculation method is as follows: ； ； ； ； in, This is the fluorine content adjustment factor. This is the adjustment factor for plaque coverage; the final cleaning parameters, including the water flow scattering angle, are consistent with the basic cleaning setting and are not adjusted. The The values ​​are as follows: when the fluoride content in the water is ≥1.0 mg / L. When the fluoride content in the water is ≥0.3 mg / L and <1.0 mg / L When the fluoride content in the water is <0.3 mg / L ; The The values ​​are as follows: when the plaque coverage is ≥50%. When the plaque coverage is ≥20% and <50% When plaque coverage is <20% .

5. The oral cleaning method for preventing and treating dental caries in children according to claim 4, characterized in that: The cleaning qualification standard is: the coverage rate of bacterial plaque after cleaning is less than a preset value, which is set to 8-10%.

6. The oral cleaning method for preventing and treating dental caries in children according to claim 5, characterized in that: The enhanced cleaning parameters include water flow scattering angle and enhanced execution pressure. Increase execution frequency Strengthen execution time And the enhanced mixing ratio of water and cleaning agents. The calculation method is as follows: ； ； ； ； Among them, the water flow scattering angle in the enhanced cleaning parameters is the same as that in the basic cleaning setting and will not be adjusted. This is an adjustment factor for plaque coverage enhancement. If the plaque coverage is ≥20% after cleaning, then... If the plaque coverage rate after cleaning is less than 20% but greater than the preset value, then... .

7. The oral cleaning method for preventing and treating dental caries in children according to claim 1, characterized in that: The safety parameters are the magnetic attraction distance between the nozzle and the main module, the tilt angle of the equipment, the real-time water pressure and the biting force in the main module. If any one of these four conditions is met, the operation will stop immediately and an audible and visual alarm will be issued.

8. An oral cleaning device for implementing the method of any one of claims 1 to 7, characterized in that: Includes the following parts: The nozzle is equipped with a spray outlet and a back suction port; the front end of the nozzle integrates a plaque sensor and a bite force sensor. The main module is detachably connected to the nozzle via a magnetic interface equipped with an electromagnet drive circuit. Internally, it integrates a multi-mode cleaning module, a negative pressure recovery module, a speed selection module, and a water quality detection chamber. The multi-mode cleaning module generates and sprays a cleaning fluid stream through the nozzle outlet. The negative pressure recovery module recovers wastewater through a back suction port. The speed selection module has at least three speed settings. The water quality detection chamber contains a built-in water quality sensor. The intelligent control module includes a microcontroller unit (MCU). The input terminals of the microcontroller unit are connected to the gear selection module, the bite force sensor, the plaque sensor, and the water quality sensor, respectively, and the output terminals are connected to the multi-mode cleaning module, the negative pressure recovery module, and the electromagnet drive circuit, respectively.

9. The oral cleaning device according to claim 8, characterized in that: The multi-mode cleaning module includes a cleaning chamber, a liquid pump unit, a magnetic levitation motor, a pressurized water flow channel, and a vortex generator connected in sequence. The cleaning chamber includes a purified water chamber and a detergent chamber that are isolated from each other. The liquid pump unit includes a purified water extraction pump and a detergent extraction pump. The vortex generator provides at least three scattering angle modes: 15°, 22°, and 40°. The negative pressure recovery module includes a negative pressure recovery pump, a wastewater chamber, and a negative pressure recovery channel connecting the return suction port and the wastewater chamber. The negative pressure recovery channel is equipped with a one-way solenoid valve. The wastewater chamber is made of transparent material and has a built-in filter.

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