Light power constant current source control device and method for oral treatment

Abstract

The application discloses a system method and device for light power constant current source supply and regulation for oral cavity sterilization and inflammation reduction. The device comprises a charger, a shell, a constant current source circuit, a control chip, an LED working light source and three different specifications and purposes of light guide heads. The constant current source circuit, the control chip and the LED working light source are packaged in the shell. It is verified through experiments that the device can kill 99% of main tooth and oral cavity pathogenic bacteria such as gingival porphyromonas and enterococcus faecalis, and has high practical value for a series of oral cavity treatment processes requiring sterilization and inflammation reduction. The three different light guide heads in the application can correspond to the treatment of pulp and root canal, periodontal and dental caries, periapical periodontitis and peri-implantitis, respectively. The light power of the LED can be automatically adjusted to the corresponding gear light power through the replacement of different light guide heads, so as to simplify the cumbersome operation of manual light power adjustment.

Description

Technical Field

[0001] This invention relates to a constant current source control device and method for optical power in oral treatment, belonging to the field of clinical treatment equipment and control technology for oral anti-inflammatory and bactericidal purposes. Background Technology

[0002] Currently, periodontal disease often begins with excessive plaque buildup. When there are too many oral bacteria, their secretions can damage tooth enamel, forming plaque. At the same time, the extracellular polymeric matrix of the plaque biofilm acts as a barrier, preventing antibacterial agents from penetrating the biofilm to kill microorganisms and further damage the biofilm, thus reducing the effectiveness of antibacterial agents and other chemical treatments. The main cases and limitations are as follows: (1) Dental caries, commonly known as cavities or tooth decay, is one of the most common dental diseases: As a bacterial disease, common pathogens include Agrobacterium actinomycetes, Porphyromonas gingivalis, Forsythoracic bacteria, and Treponema denticulatum. Severe caries can lead to periodontitis. If left untreated, the lesions continue to progress, forming cavities and eventually causing complete destruction and loss of the tooth crown. Untreated cavities will not heal on their own, and the ultimate result is tooth loss. Currently, the clinical methods for removing caries plaque include basic treatments such as scaling, root planing, and subgingival debridement, followed by the use of antibiotics to reduce inflammation. The drawback of this approach is that antibiotic treatment requires injection or systemic inhalation of the medication to achieve anti-inflammatory effects over a period of time, thus failing to target the infection effectively. Furthermore, its bactericidal effect is not ideal for periodontitis caused by deep caries. (2) Periodontitis and periapical periodontitis: Periodontitis is a chronic inflammation of the periodontal supporting tissues primarily caused by local factors. The most common cause is the failure to promptly remove plaque adhering to the tooth surface. As a bacterial disease, common pathogens include Porphyromonas gingivalis. Untreated periodontitis can lead to symptoms such as periodontal pocket formation, periodontal abscesses, and loose teeth. Acute or chronic inflammation of the root canal is called periapical periodontitis. Bacterial infection of the root canal can lead to periapical periodontitis. As a bacterial disease, common pathogens include Enterococcus faecalis. The detection rate of Enterococcus faecalis in reinfected root canals is 24%–77%. Detection and removal of Enterococcus faecalis in reinfected root canals helps improve the success rate of root canal retreatment. Untreated periapical periodontitis can lead to acute periapical abscess, persistent throbbing pain, and in severe cases, tooth extraction may be necessary. The treatment of periodontitis and periapical periodontitis aims to relieve symptoms and halt the disease progression. The basic process can be divided into two steps: first, incision and drainage of the abscess at the lesion site is necessary to relieve pressure and eliminate throbbing pain; subsequently, the lesion site needs to be sterilized and irrigated to prevent further disease progression. Currently, the clinical treatment methods for periodontitis and periapical periodontitis include supragingival scaling or subgingival curettage, irrigation of the periodontal pocket with medication, and administration of appropriate antibiotics to assist in anti-inflammatory treatment. For severe cases, opening the gingiva to expose the lesion site for irrigation and curettage may be considered; if tooth loosening occurs, extraction of the affected tooth may be considered. The drawbacks of these techniques are that debridement and anti-inflammatory methods require injection or systemic inhalation of medication over a period of time to achieve anti-inflammatory effects, lacking targeted action and resulting in a long treatment cycle. Summary of the Invention

[0003] To address the aforementioned problems, this invention aims to provide a constant current source control device and method for optical power in oral treatment.

[0004] This invention introduces photodynamic therapy (PDT), which utilizes the strong oxidizing singlet oxygen generated by the combined reaction of light, photosensitizer, and oxygen to kill pathogenic microorganisms at the lesion site, thereby achieving a sterilization effect in periodontitis or periapical periodontitis. Simultaneously, this invention considers simplicity; for different conditions, only replaceable parts need to be replaced, without any other operations. Its innovation lies in proposing a system that can achieve different light power conversions simply by changing different light guides, greatly simplifying the operation and avoiding secondary oral damage caused by instrument scaling and anti-inflammatory drugs during anti-inflammatory treatment.

[0005] The innovative features and advantages of the power system for oral anti-inflammatory and sterilization are as follows: by adding a rotatable power attenuator, different replacement heads can rotate the attenuator to their corresponding different positions, thereby achieving effective control of optical power and meeting the requirement of convenient reuse by simply replacing the light guide head.

[0006] The beneficial effects of this invention are: (1) introducing photodynamic therapy to treat oral diseases, thus solving the defects of existing clinical techniques; (2) realizing the rapid switching of methods and devices for treating four diseases: periodontitis, root canal inflammation, peri-implantitis, and periapical periodontitis, without losing convenience; (3) by simplifying the operation, reducing the probability of secondary damage caused by human factors during treatment, which is beneficial to patients. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below.

[0008] Figure 1 This is an overall diagram of the device.

[0009] Figure 2 To connect the head and tail.

[0010] Figure 3a This is a schematic diagram of the periodontal light guide needle structure; Figure 3b This is a schematic diagram of the root canal light guide needle structure; Figure 3c This is a schematic diagram of the blunt flat optical guide head structure.

[0011] Figure 4a Rear view of the periodontal light guide needle; Figure 4b This is a rear view of the root canal light guide tip; Figure 4c This is a rear view of the blunt flat light guide head.

[0012] Figure 5 This is an exploded assembly drawing of the entire device.

[0013] Figure 6a This is a schematic diagram of an attenuator. Figure 6b This is a schematic diagram showing the attenuator completely shut off. Figure 6c This is a schematic diagram showing the attenuator fully open. Figure 6d This is a schematic diagram showing the attenuator section partially open.

[0014] Figure 7 This is a schematic diagram of dental plaque treatment.

[0015] Figure 8 This is a diagram illustrating the treatment of dental caries.

[0016] Figure 9 This is a diagram illustrating the treatment of periapical periodontitis.

[0017] Figure 10 This is the power drive circuit diagram for this device. Figure 11 This is the circuit diagram of the constant current source for this device. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the following detailed embodiments are described in conjunction with the appendix. Figures 1 to 11The present invention will be described in further detail below. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention; moreover, technical features involved in different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other. The invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale.

[0019] It includes a charging base 1, a plastic shell 2, a constant current source circuit 3, a control chip 4, an LED working light source 5, a light guide head 6, a control circuit 7, and a power attenuator 8; The constant current source circuit 3, the control chip 4, and the control circuit 7 are encapsulated in a plastic casing 2; The plastic casing 2 handheld section is also provided with a control area 24 including a work switch 241, a treatment time selection button 242, and a light source wavelength selection button 243; the control area 24 is electrically connected to the control chip 4; The top of the plastic housing 2 is provided with a concave connector 21, and the LED light source 5 is located in the center of the connector 21 and is electrically connected to the working switch 241, the light source wavelength selection button 243 and the control chip 4. The front end of the LED light source 5 is also fixedly provided with a power attenuation plate 8; the power attenuation plate 8 has a double-layer structure, including an inner fixed plate 81 and an outer rotating plate 82 arranged coaxially. Both the inner fixed plate 81 and the outer rotating plate 82 are composed of six 30° fan-shaped blades arranged in a rotating array with a 30° interval between them. The inner fixing plate 81 is fixed to the front end of the LED light source 5, and the outer rotating plate 82 rotates 0 to 30° around the center of the inner fixing plate 81. Together with the inner fixing plate 81, they form three different types of light-blocking areas for the LED light source 5: complete blocking, partial blocking, and minimum blocking, thus forming three different output power states to achieve the control of light power. The light guide head 6 consists of three models with different specifications and uses: a short periodontal light guide head 61, a long root canal light guide head 62, and a blunt flat light guide head 63. The periodontal light guide 61 has an optical power of 60mW to 85mW, with the power attenuation plate 8 providing partial obstruction; the root canal light guide 62 has an optical power of approximately 40mW to 50mW, with the power attenuation plate 8 providing complete obstruction; and the blunt flat light guide 63 has an optical power of 160mW to 220mW, with the power attenuation plate 8 providing minimal obstruction. The light guide head 6 is fixedly mounted on the connector 21.

[0020] The periodontal light guide 61 is used for superficial treatments such as periodontitis and plaque irradiation; the root canal light guide 62 is used for irradiation operations requiring precise treatment, such as pulp root canal treatment; and the blunt flat light guide 63 is used for operations requiring large-area irradiation for sterilization and anti-inflammation, such as periapical periodontitis and peri-implantitis.

[0021] The concave connector 21 has an arc edge, and at least two slots 211 are designed on the arc. The light guide head 6 is connected to the slots 211 by a corresponding convex mounting head 611 through an interference fit.

[0022] The rated output optical power of the constant current source circuit 3 is 500 mW to 700 mW. The LED working light source 5 is a red and blue variable light source, with the red light wavelength ranging from 630 nm to 650 nm and the blue light wavelength ranging from 430 nm to 450 nm.

[0023] The control chip 4 also includes a current control chip 42 for detecting the current in the circuit. When the current is too high, the control chip 4 is fed back to control the switch to open, cutting off the power supply circuit. This avoids excessive battery life loss and extends the service life of the equipment.

[0024] The control chip 4 also includes a temperature control chip 41 and an indicator light. The temperature control chip 41 and the indicator light are linked by a switch. When the indicator light is powered on, the timer starts working. When the temperature control chip 41 detects a temperature greater than 80 ℃, it sends a feedback to the control chip 4 to open the control switch and cut off the power supply circuit. When the temperature control chip 41 detects a temperature drop to 40 ℃, it sends a feedback to the control chip 4 to close the control switch, restore the power supply to the circuit, and the indicator light flashes to indicate continued use.

[0025] The light guide head 6 is made of bisphenol A carbonate. The short periodontal light guide needle 61 is used for superficial treatments such as periodontitis and plaque irradiation; the long root canal light guide needle 62 is used for irradiation operations requiring precise treatment, such as pulp root canal treatment; and the blunt light guide head 63 is used for operations requiring large-area irradiation for sterilization and anti-inflammation, such as periapical periodontitis and peri-implantitis.

[0026] This invention includes the following oral treatment steps and principles: Step 1: In an aerobic environment, the toluidine blue O photosensitizer can adhere to bacteria, at which point the photosensitizer is in a singlet state; Step 2: After being irradiated by an external light source, the photosensitizer is excited and transitions to the excited singlet state, and then rapidly intersystems jumps to the excited triplet state; Step 3: The photosensitizer triplet state collides directly with tissue oxygen, releases energy and returns to the singlet state. The released energy is absorbed by tissue oxygen, generating singlet reactive oxygen species. Step 4: Reactive oxygen species produce rapid lipid oxidation on bacteria, affecting their metabolism and causing them to die quickly, thus achieving bactericidal and anti-inflammatory effects.

[0027] A method for controlling a constant current source of optical power for oral treatment: Method 1: Sterilization procedures for periodontitis, dental plaque, and tooth decay: S1.1 Rinse the operating space, and then use a bio-cotton to absorb as much moisture as possible from the mouth; S1.2 Install the light guide head 6 as a short periodontal light guide needle head 61, press and hold the working switch 241 on the plastic shell 2 for one second, the indicator light flashes red and blue alternately, then press the light source wavelength selection button 243 to select the light source. For superficial anti-inflammatory and dental plaque, use red light. Observe that the indicator light turns red and stays on, indicating that the system is ready. S1.3 Apply the photosensitizer toluidine blue O, abbreviated as TBO, to the periodontal surface. Insert the periodontal light guide head 6 into the oral cavity, and then press the working switch 241 again. The system starts working. The duration of a single irradiation is 30 seconds. During the process, rotate around the tooth lesion for irradiation. After cleaning, use physiological saline to clean the photosensitizer residue in the oral cavity until there is no attached color. S1.4 After 30 seconds, the sterilization process is complete and the light source is turned off normally. Remove the device from the mouth and press and hold the working switch 241 button on the outer shell for one second to stop the device from supplying power. Method 2: Sterilization procedures for the dental pulp and root canals: S2.1 Rinse the operating space, and then use a bio-cotton to absorb as much moisture as possible from the mouth; S2.2 Replace the light guide head 6 with a long root canal light guide needle 62. Press and hold the working switch 241 on the plastic shell 2 for one second. The indicator light will flash red and blue alternately. Then press the light source wavelength selection button 243 to select the light source. For normal root canal sealing and cleaning, if the patient does not have any lesions or other special conditions, blue light should be used to directly irradiate the lesion. It is not necessary to use it in conjunction with toluidine blue O. Observe that the indicator light turns blue and stays on, indicating that the system is ready. S2.3. Inject the photosensitizer toluidine blue O into the root canal using a syringe. For deeper root canals, after injection, use a root canal squeegee to remove air bubbles. Then, insert the root canal light guide 6 into the oral cavity, align it with the root canal, and press the working switch 241 again. The system will start working, and the duration of a single irradiation is 60 seconds. During the process, pay attention to irradiating the inflamed areas. After cleaning, clean the root canal with saline until there is no more attached color. S2.4 After 60 seconds, the sterilization process is complete and the light source is turned off normally. Remove the device from the mouth and press and hold the working switch 241 button on the outer shell for one second to stop the device from supplying power. Method 3: Sterilization procedures for peri-implantitis: S3.1. Drain the pus and rinse the affected area with saline solution; S3.2 Replace the light guide head 6 with the blunt flat light guide head 63. Press and hold the working switch 241 on the plastic shell 2 for one second. The indicator light will flash red and blue alternately. Then press the light source wavelength selection button 243 to select the light source. For peri-implantitis, red light should be used to irradiate the lesion. Apply the photosensitizer toluidine blue O to the peri-implantitis lesion. Inject the photosensitizer toluidine blue O into the gingival surface with a syringe. Insert the light guide head 6 into the oral cavity and aim it at the peri-implantitis lesion. Then press the working switch 24 again. The duration of a single irradiation is 90 seconds. During the process, it is necessary to focus on irradiating the lesion. After cleaning, the photosensitizer residue in the oral cavity needs to be cleaned with saline until there is no attached color. S3.3 After 90 seconds, the sterilization process is complete and the light source is turned off normally. Remove the device from the mouth and press and hold the working switch 241 button on the outer shell for 1 second to stop the device from supplying power. Method 4: Sterilization procedures for periapical periodontitis: S4.1 Locate the lesion, aspirate the pus, and rinse the lesion area with physiological saline; S4.2 Install the light guide head 6 as a blunt flat light guide head 63. Press and hold the working switch 241 on the plastic shell 2 for one second. The indicator light will flash red and blue alternately. Then press the light source wavelength selection button 243 to select the light source. For periapical periodontitis, red light should be used to irradiate the lesion. Apply the photosensitizer toluidine blue O to the lesion on the gingival surface. Insert the light guide head 6 into the oral cavity and aim it at the periapical periodontitis lesion. Then press the working switch 241 again. The system will start working. The duration of a single irradiation is 90 seconds. During the process, it is necessary to focus on irradiating the incision area. After cleaning, the photosensitizer residue in the oral cavity needs to be cleaned with saline until there is no attached color. S4.3 After 90 seconds, the sterilization process is complete and the light source is turned off normally. Remove the device from the mouth and press and hold the working switch 241 button on the outer shell for 1 second to stop the device from supplying power.

[0028] Specifically, the timer starts working as soon as the LED is powered on. The operating temperature of the device is specified to be no higher than 80°C. If the temperature gets too high, the thermistor chip will control the disconnect switch to begin cooling. Once the temperature drops to 40°C, the indicator light on the device will flash, indicating that it can continue to be used.

[0029] (In particular, when patients have conditions such as oral fibrosis, further irritation to the oral mucosa should be avoided, and the above procedures should all be performed using red light.) The relationship between the output power P of the light guide head 6 and its efficiency E in killing pathogenic bacteria such as Porphyromonas gingivalis is as follows: ; The relationship between the output power P of the light guide head (6) and the efficiency E in killing Enterobacteriaceae faecalis is as follows: .

[0030] To verify the practicality of the present invention, the following embodiments are provided: Example 1: In clinical treatment of dental plaque, the teeth are first rinsed and dried with bio-cotton. Then, toluidine blue O (TBO) photosensitizer is applied to the tooth surface. The device is removed from the charger 1, and the short periodontal light guide needle 61 is installed. The device is activated by pressing and holding the working switch 241 button on the outer casing 2 for 3 seconds. The light source wavelength selection button 243 on the outer casing 2 is pressed. When the indicator light above turns red, it indicates that the selected beam wavelength is 630 nm red light. The treatment time selection button 25 on the outer casing 2 is pressed, and the root canal light guide needle 6 is brought close to the lesion. The working switch 24 button is pressed to activate the light source for photodynamic sterilization. After 30 seconds, the sterilization process is complete, and the light source automatically turns off. The device is then removed from the oral cavity, and the working switch 24 button on the outer casing 2 is pressed and held for 3 seconds to turn it off.

[0031] Example 2: In clinical root canal treatment, the tooth is first rinsed and dried with bio-cotton, followed by injection of toluidine blue O (TBO) into the root canal. The device is removed from the charger 1, and the long root canal light guide needle 62 is installed. The device is activated by pressing and holding the working switch 241 button on the outer casing 2 for 3 seconds. The light source wavelength selection button 243 on the outer casing 2 is pressed. When the indicator light above turns blue, it indicates that the selected beam wavelength is 430 nm blue light. The treatment time selection button 242 on the outer casing 2 is pressed, and the root canal light guide needle 62 is brought close to the lesion. The working switch 241 button is pressed to activate the light source for photodynamic sterilization. After 60 seconds, the sterilization process is complete, and the light source automatically turns off. The device is then removed from the oral cavity, and the device is deactivated by pressing and holding the working switch 241 button on the outer casing 2 for 3 seconds.

[0032] Example 3: In the clinical treatment of periapical periodontitis, the lesion site is first drained and irrigated to remove blood and pus. Toluidine blue O (TBO) is then injected into the gingival lesion. The device of this invention is removed from the charger 1, followed by the removal of the disposable blunt-faced light guide head 63, which is then installed on the device head. The device is activated by pressing and holding the working switch 241 button on the outer casing 2 for 3 seconds. The light source wavelength selection button 243 on the outer casing 2 is pressed until the indicator light above turns blue, indicating that the selected beam wavelength is 430nm blue light. The blunt-faced light guide head 3 is brought close to the lesion, and the working switch 241 button is pressed to activate the light source for photodynamic sterilization. After 90 seconds, the sterilization process is completed, and the light source automatically turns off. The device is then removed from the oral cavity, and the device is deactivated by pressing and holding the working switch 241 button on the outer casing 2 for 3 seconds. Finally, the incision is closed after rinsing and disinfection.

[0033] Example 4: In the clinical treatment of periodontitis, the first step is to rinse and aspirate blood and pus. Then, toluidine blue O (TBO) is injected into the lesion. The device is then removed from the charger 1, followed by the removal of the disposable blunt-faced light guide head, which is installed on the device head. The device is activated by pressing and holding the operating switch 241 button on the outer casing 2 for 3 seconds. The light source wavelength selection button 243 on the outer casing 2 is pressed until the indicator light above turns blue, indicating that the selected beam wavelength is 430 nm blue light. The treatment time selection button 242 on the outer casing 2 is then pressed, and the blunt-faced light guide head 63 is brought close to the lesion. The operating switch 241 button is pressed to activate the light source for photodynamic sterilization. After 90 seconds, the sterilization process is complete, and the light source automatically turns off. The device is then removed from the oral cavity, and the device is deactivated by pressing and holding the operating switch 241 button on the outer casing 2 for 3 seconds.

[0034] Example 5: For normal root canal filling and cleaning, if the patient does not have any special conditions such as lesions, blue light should be used to directly irradiate the lesion without the need for toluidine blue O (TBO). Observing the indicator light turn blue and remain constantly lit indicates that the system is ready. Press the light source wavelength selection button 243 on the outer shell 2. When the indicator light above turns blue, it indicates that the selected beam wavelength is 430nm blue light. Press the treatment time selection button 242 on the outer shell 2, bring the blunt flat light guide head 3 close to the lesion, and press the working switch 241 button to start the light source for photodynamic sterilization. After 90 seconds, the sterilization process is completed, and the light source will automatically turn off. Remove the device from the oral cavity and press and hold the working switch 241 button on the outer shell 2 for 1 second to turn off the device.

[0035] Example 6: The device of this invention, in conjunction with the photosensitizer toluidine blue O, was used to conduct photodynamic sterilization experiments on Porphyromonas gingivalis and Enterococcus faecalis. A 630 nm red light beam and a 430 nm blue light beam were selected, and the illumination time was 30 seconds. The experimental results showed that the sterilization effect at the end of the system was obvious, and the sterilization efficiency could reach 99%.

[0036] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A constant current source control device for optical power in oral treatment, characterized in that: It includes a charging base (1), a plastic shell (2), a constant current source circuit (3), a control chip (4), an LED working light source (5), a light guide head (6), a control circuit (7), and a power attenuator (8); The constant current source circuit (3), the control chip (4), and the control circuit (7) are encapsulated in a plastic shell (2); The plastic shell (2) handheld section is also provided with a control area (24) including a working switch (241), a treatment time selection button (242), and a light source wavelength selection button (243); the control area (24) is electrically connected to the control chip (4); A concave connector (21) is provided on the top of the plastic shell (2), and the LED working light source (5) is located in the center of the connector (21) and is electrically connected to the working switch (241), the light source wavelength selection button (243) and the control chip (4); The front end of the LED working light source (5) is also fixedly provided with a power attenuation plate (8); the power attenuation plate (8) is a double-layer structure, including an inner fixed plate (81) and an outer rotating plate (82) arranged coaxially. Both the inner fixed plate (81) and the outer rotating plate (82) are composed of six 30° fan-shaped blades arranged in a rotating array with a 30° interval between each other. The inner fixing plate (81) is fixed at the front end of the LED working light source (5), and the outer rotating plate (82) rotates 0 to 30° around the center of the inner fixing plate (81). Together with the inner fixing plate (81), they form three different types of light-blocking areas for the LED working light source (5): complete blocking, partial blocking, and minimum blocking, thus forming three different output power states to achieve the control of light power. The light guide (6) consists of three types of models with different specifications and uses: a short periodontal light guide (61), a long root canal light guide (62), and a blunt flat light guide (63). The periodontal light guide (61) has an optical power of 60mW to 85mW, with the power attenuation plate (8) providing partial coverage; the root canal light guide (62) has an optical power of 40mW to 50mW, with the power attenuation plate (8) providing complete coverage; and the blunt flat light guide (63) has an optical power of 160mW to 220mW, with the power attenuation plate (8) providing minimal coverage. The light guide head (6) is fixedly installed on the connector (21).

2. The optical power constant current source control device for oral treatment according to claim 1, characterized in that: The concave connector (21) has an arc edge with at least two slots (211) designed on the arc. The light guide head (6) is connected to the slot (211) by a corresponding convex mounting head (611) with an interference fit.

3. The optical power constant current source control device for oral treatment according to claim 1, characterized in that: The rated output optical power of the constant current source circuit (3) is 500 mW to 700 mW. The LED working light source (5) is a red and blue variable light source. The wavelength of red light is 630 nm to 650 nm, and the wavelength of blue light is 430 nm to 450 nm.

4. The optical power constant current source control device for oral treatment according to claim 1, characterized in that: The control chip (4) also includes a current control chip (42) for detecting the current in the circuit. When the current is too large, it feeds back to the control chip (4) to control the switch to open and cut off the power supply circuit.

5. The optical power constant current source control device for oral treatment according to claim 1, characterized in that: The control chip (4) also includes a temperature control chip (41) and an indicator light. The temperature control chip (41) and the indicator light are linked by a switch. When the temperature monitoring chip (41) detects that the temperature is greater than 80 ℃, it feeds back to the control chip (4) to control the switch to open and cut off the power supply circuit. When the temperature monitoring chip (41) detects that the temperature drops to 40 ℃, it feeds back to the control chip (4) to control the switch to close and restore the power supply to the circuit. The indicator light flashes to indicate that the user should continue to use the device.

6. The optical power constant current source control device for oral treatment according to claim 1, characterized in that: The light guide head (6) is made of bisphenol A carbonate.

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