Dental plaque detection device

Abstract

The present disclosure provides a dental plaque detection device, comprising a housing, a shielding cylinder, an oral retractor, a first-waveband light source, a second-waveband optical filter, and a camera. The housing forms a cavity and a working surface. The working surface is a part of the surface defining the cavity, and a first hole and a second hole are formed in the working surface. The first-waveband light source and the camera are fixed in the cavity. The shielding cylinder extends from the edge of the working surface. The second-waveband optical filter is mounted in the shielding cylinder. The oral retractor extends from the end of the shielding cylinder and is configured for expanding the lips and cheeks of a patient to expose the teeth. The mounted first-waveband light source can irradiate the exposed teeth through the first hole and the shielding cylinder due to the expanded lips and cheeks of the patient by the oral retractor. The mounted camera can acquire images of the teeth irradiated by the first-waveband light source through the second hole, the shielding cylinder, and the second-waveband optical filter.

Description

Dental plaque detection device

[0001] This disclosure claims priority to a Chinese patent application with application date of January 11, 2024, application number 2024200750026 and utility model name “Dental Plaque Detection Device”. Technical Field

[0002] The present disclosure relates to the field of oral medicine technology, in particular to the field of tooth detection technology, and can be applied in tooth treatment scenarios. Background Art

[0003] Dental plaque is a soft, unmineralized bacterial group wrapped in a matrix that adheres to each other, or adheres to the tooth surface, between teeth, or the surface of restorations. It is a bacterial biofilm that cannot be washed away or rinsed off with water and is generally difficult to observe directly with the naked eye.

[0004] Existing methods for detecting dental plaque involve evenly applying a disclosing agent to the tooth surface in the mouth. The color of the disclosing agent then indicates the distribution of plaque. After the disclosing agent is removed, the disclosing agent may remain on the tooth surface for a period of time.

[0005] This method takes a long time to operate and is prone to missing the detection of tooth surfaces where the indicator is not applied. In addition, due to inadequate cleaning of the indicator, it may also cause oral infection.

[0006] Utility Model Content

[0007] The present disclosure provides a dental plaque detection device for improving the efficiency and reliability of dental plaque detection.

[0008] According to one aspect of the present disclosure, a dental plaque detection device is provided, comprising a housing, a shielding cylinder, an oral retractor, a first-band light source, a second-band filter, and a camera; wherein,

[0009] The housing forms a chamber and a working surface, wherein the working surface is a portion of a surface surrounding the chamber, and a first hole and a second hole are formed on the working surface.

[0010] The first-band light source and the camera are fixedly installed in the chamber.

[0011] The shielding cylinder extends from the edge of the working surface.

[0012] The second wavelength filter is installed in the shielding tube.

[0013] The end of the shielding tube is extended with the oral retractor, which is used to open the patient's lips and cheeks to expose the teeth.

[0014] The first wavelength band light source is installed so that it can illuminate the teeth exposed by the patient's lips and cheeks being opened by the oral retractor through the first hole and the shielding tube.

[0015] The camera is installed so that it can collect images of the teeth illuminated by the light source of the first wavelength band through the second hole, the shielding cylinder and the second wavelength band filter.

[0016] As for the above aspects and any possible implementation manner, an implementation manner is further provided: if the oral retractor is closed, the working surface and the shielding tube form a closed cavity.

[0017] As for the above aspects and any possible implementation, an implementation is further provided, wherein the first wavelength band light source includes a purple light source or an ultraviolet light source.

[0018] As for the above aspects and any possible implementation method, an implementation method is further provided, wherein the second band filter is fixedly installed in the shielding tube or detachably installed in the shielding tube, so that the filtering range of the second band filter covers the collection range of the camera.

[0019] As for the above aspects and any possible implementation manner, an implementation manner is further provided, wherein the second wavelength filter includes a long-wave pass filter.

[0020] As for the above aspects and any possible implementation manner, an implementation manner is further provided, wherein the chamber is a closed chamber.

[0021] As for the above aspects and any possible implementation manner, an implementation manner is further provided, in which the edge profile of the cross section of the shielding cylinder is an oval shape that is symmetrical in both vertical and horizontal directions.

[0022] As for the above aspects and any possible implementation, an implementation is further provided, wherein one section of the shielding tube is formed by integrally extending from the shell toward the oral retractor, and the other section of the shielding tube is formed by integrally extending from the oral retractor toward the shell, and the two sections of the shielding tube are connected by a socket connection.

[0023] As for the above aspects and any possible implementation manner, an implementation manner is further provided, in which a snap-fit ​​structure is respectively provided at the joints of the two sections of the shielding tube, so that the two sections of the shielding tube remain relatively fixed.

[0024] As for the above aspects and any possible implementation manner, an implementation manner is further provided, wherein the shielding tube is formed by the oral retractor extending integrally toward the housing, and the shielding tube is sleeved on the edge of the working surface.

[0025] As for the above aspects and any possible implementation, an implementation is further provided, wherein one end of the shielding tube close to the shell and the edge of the working surface are respectively provided with snap structures, so that the shielding tube and the shell remain relatively fixed.

[0026] As for the above aspects and any possible implementation, an implementation is further provided, wherein a first end of the shielding tube is sleeved on an edge of the working surface, and a second end of the shielding tube opposite to the first end is sleeved on the oral retractor.

[0027] As for the above aspects and any possible implementation method, an implementation method is further provided, in which the first end of the shielding tube and the edge of the working surface are respectively provided with a snap structure, so that the shielding tube and the shell remain relatively fixed, and the second end of the shielding tube and the joint of the oral retractor are respectively provided with a snap structure, so that the shielding tube and the oral retractor remain relatively fixed.

[0028] As for the above aspects and any possible implementation manner, an implementation manner is further provided, in which the relative positions of the second hole and the shielding cylinder along the working surface are pre-designed.

[0029] The above aspects and any possible implementation methods further provide an implementation method, wherein the dental plaque detection device also includes N lighting light sources installed in the chamber, and N third holes corresponding to the N lighting light sources are formed on the working surface, so that the N lighting light sources provide lighting for the camera to capture images through the N third holes, and N is a natural number greater than or equal to 1.

[0030] As for the above aspects and any possible implementation, an implementation is further provided, where N is a natural number greater than 1, and the N third holes are evenly distributed around the camera.

[0031] As for the above aspects and any possible implementation method, an implementation method is further provided, wherein the dental plaque detection device also includes a control device installed in the chamber, and the control device is electrically connected to the first-band light source, the camera and N lighting light sources, and is used to control the first-band light source, the camera and N lighting light sources.

[0032] As for the above aspects and any possible implementation method, an implementation method is further provided, wherein the dental plaque detection device also includes a battery installed in the chamber, and the battery is electrically connected to the control device, the first band light source, the camera and N lighting light sources to power them.

[0033] It can be seen from the above technical solution that the embodiment of the present disclosure does not require any reagent to be applied in the oral cavity. The user only needs to hold the outer shell of the handheld device and place the oral retractor into the oral cavity to be tested. Since the porphyrin compounds produced by dental plaque metabolism will produce different colors of fluorescence (such as red fluorescence) from other tooth structures under the irradiation of specific band light (such as purple light / ultraviolet light), dental plaque detection can be achieved by illuminating the image of the teeth in the oral cavity with the first band light source captured by the camera output by the display device. The operation is simple and will not miss the detection of any tooth part, thereby improving the efficiency and reliability of dental plaque detection.

[0034] In addition, by adopting the technical solution provided by the present disclosure, the embodiment of the present disclosure allows the user to flexibly place the direction and position of the oral retractor, so that the camera can capture images of the upper occlusal surface, lower occlusal surface, frontal view, left view, and right view of the teeth, thereby realizing the detection of dental plaque in the entire mouth and effectively improving the reliability of dental plaque detection.

[0035] In addition, the technical solution provided by the present disclosure can effectively improve the user experience.

[0036] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without inventive effort. The drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure. Among them:

[0038] FIG1 schematically shows a dental plaque detection device in one embodiment of the present application;

[0039] FIG2 schematically shows a main unit of the dental plaque detection device shown in FIG1 ;

[0040] FIG3 schematically illustrates an oral retractor of the dental plaque detection device shown in FIG1 ;

[0041] FIG4 is a top view of the host computer shown in FIG2; and

[0042] FIG5 is a bottom view of the host shown in FIG2 . DETAILED DESCRIPTION

[0043] The following description of exemplary embodiments of the present disclosure is made in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0044] Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0045] It should be noted that the electronic devices involved in the embodiments of the present disclosure may include but are not limited to mobile phones, personal digital assistants (PDAs), wireless handheld devices, tablet computers, PADs and other smart devices.

[0046] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0047] The dental plaque detection device provided by the present disclosure may include a housing, a shielding tube, an oral retractor, a first-band light source, a second-band filter, and a camera; wherein,

[0048] The housing forms a chamber and a working surface, wherein the working surface is a portion of a surface surrounding the chamber, and a first hole and a second hole are formed on the working surface.

[0049] The first-band light source and the camera are fixedly installed in the chamber.

[0050] The shielding cylinder extends from the edge of the working surface.

[0051] The second wavelength filter is installed in the shielding tube.

[0052] The end of the shielding tube is extended with the oral retractor, which is used to open the patient's lips and cheeks to expose the teeth.

[0053] The first wavelength band light source is installed so that it can illuminate the teeth exposed by the patient's lips and cheeks being opened by the oral retractor through the first hole and the shielding tube.

[0054] The camera is installed so that it can collect images of the teeth illuminated by the light source of the first wavelength band through the second hole, the shielding cylinder and the second wavelength band filter.

[0055] Since the porphyrin compounds produced by the metabolism of dental plaque will produce fluorescence of different colors (such as red fluorescence, which ranges from about 600nm to 700nm) from other tooth structures when irradiated by light of a specific wavelength (such as violet light / ultraviolet light, which ranges from about 330nm to 480nm), a violet light source or an ultraviolet light source can be selected as the first wavelength light source. In this way, the teeth exposed by the patient's lips and cheeks being opened by the oral retractor can be illuminated through the first hole and the shielding tube. If there is dental plaque on the teeth, the tooth position corresponding to the dental plaque will show red fluorescence under the irradiation of the light source, which will be captured by the camera.

[0056] After the camera captures the image of the teeth, the image is transmitted to a display device via a wired or wireless method for display. The display device can be a separate device or a device installed on a housing.

[0057] In order to enable the camera to clearly capture images of dental plaque under the illumination of light in a specific band, a long-wave pass filter (such as 600nm wavelength) can be used as a second-band filter to filter out light of other colors, thereby ensuring the image quality of the dental plaque distribution captured by the camera.

[0058] In this way, the dental plaque detection device provided by the present disclosure does not require any reagent to be applied in the oral cavity. The user only needs to hold the outer shell of the handheld device and place the oral retractor into the oral cavity to be tested. Since the porphyrin compounds produced by dental plaque metabolism will produce fluorescence of different colors (such as red fluorescence) from other tooth structures under the irradiation of specific band light (such as purple light / ultraviolet light), dental plaque detection can be achieved by illuminating the image of the teeth in the oral cavity with the first band light source captured by the camera output by the display device. The operation is simple and no part of the tooth will be missed in the detection, thereby improving the efficiency and reliability of dental plaque detection.

[0059] Optionally, in a possible implementation of this embodiment, if the oral retractor is closed, the working surface and the shielding tube may form a closed cavity.

[0060] Optionally, in one possible implementation of this embodiment, the second wavelength filter may be fixedly mounted or removably mounted within the shielding tube, such that the filtering range of the second wavelength filter covers the acquisition range of the camera. When the camera captures an image of teeth illuminated by light of a specific wavelength, light of all colors except red fluorescence is completely filtered out.

[0061] Optionally, in a possible implementation of this embodiment, the chamber formed by the shell is a closed chamber, which can effectively prevent dust or water vapor from entering the shell.

[0062] Optionally, in a possible implementation of this embodiment, the edge profile of the cross section of the shielding cylinder may be an oval shape that is symmetrical vertically and horizontally.

[0063] Optionally, in a possible implementation of this embodiment, one section of the shielding tube may be formed by integrally extending from the shell toward the oral retractor, and another section of the shielding tube may be formed by integrally extending from the oral retractor toward the shell, and the two sections of the shielding tube may be connected by a socket connection.

[0064] In a specific embodiment, the joints of the two sections of the shielding tube may be provided with snap-fit ​​structures respectively, so that the two sections of the shielding tube remain relatively fixed.

[0065] Optionally, in a possible implementation of this embodiment, the shielding tube may be formed by the oral retractor extending integrally toward the housing, and the shielding tube may be sleeved on the edge of the working surface.

[0066] In a specific embodiment, one end of the shielding tube close to the shell and the edge of the working surface may be provided with snap-fit ​​structures respectively, so that the shielding tube and the shell remain relatively fixed.

[0067] Optionally, in a possible implementation of this embodiment, the first end of the shielding tube may be sleeved on the edge of the working surface, and the second end of the shielding tube opposite to the first end may be sleeved on the oral retractor.

[0068] In a specific embodiment, the first end of the shielding tube and the edge of the working surface can be respectively provided with a snap structure, so that the shielding tube and the shell remain relatively fixed, and the second end of the shielding tube and the joint of the oral retractor can be respectively provided with a snap structure, so that the shielding tube and the oral retractor remain relatively fixed.

[0069] Optionally, in a possible implementation of this embodiment, the relative positions of the second hole and the shielding cylinder along the working surface may be pre-designed.

[0070] Optionally, in a possible implementation of this embodiment, the dental plaque detection device may further include N lighting light sources, which can be installed in the chamber, and N third holes corresponding to the N lighting light sources are formed on the working surface, so that the N lighting light sources provide lighting for the camera to capture images after the first-band light source is turned off through the N third holes, and N is a natural number greater than or equal to 1.

[0071] In a specific embodiment, N is a natural number greater than 1, and the N third holes are evenly distributed around the camera.

[0072] In another specific embodiment, the dental plaque detection device may further include a control device installed in the chamber, and the control device is electrically connected to the first band light source, the camera and N lighting light sources, and is used to control the first band light source, the camera and N lighting light sources.

[0073] In another specific embodiment, the dental plaque detection device may further include a battery installed in the chamber, and the battery is electrically connected to the control device, the first band light source, the camera and N lighting light sources to provide power for them.

[0074] The dental plaque detection device provided by the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0075] Please refer to FIG1 , which schematically illustrates a dental plaque detection device 100 in one embodiment of the present disclosure, which includes a main unit 101 and an oral retractor 103 , which are connected via a socket connection.

[0076] Please refer to Figures 2-5 again, where Figure 2 schematically shows the host 101 shown in Figure 1, Figure 3 schematically shows the oral retractor 103 shown in Figure 1, Figure 4 is a top view of the host 101 shown in Figure 1, and Figure 5 is a bottom view of the host 101 shown in Figure 1.

[0077] The main unit 101 has a generally U-shaped outer profile and a vertically and horizontally symmetrical oval cross-section. As those skilled in the art will appreciate, in addition to the shape in this embodiment, the main unit 101 may be any other shape suitable for a user to hold in hand.

[0078] The main unit 101 includes a housing 1010, the lower half of which forms a closed chamber for mounting corresponding components. The side of the housing 1010 adjacent to the oral retractor 103 forms a working surface 1011, which is a part of the surface surrounding the chamber.

[0079] The housing 1010 integrally extends upward from the edge of the working surface 1011 (ie, toward the oral retractor 103 ) to form a barrel 1017 that surrounds the working surface 1011 . A plurality of buckles 1019 are formed on one end of the barrel 1017 away from the working surface 1011 .

[0080] The oral retractor 103 includes a tube 1031 with a flange 1033 formed on its first end, facing away from the main body 101. A second end, opposite the first end, is formed with multiple latches 1035, which engage with multiple latches 1019 on the top of the tube 1017 of the housing 1010. The oral retractor 103 and the housing 1010 are connected via a sleeve joint, with the latches 1035 and 1019 interlocking to maintain relative stability. It is understood that in addition to latch fastening, any other suitable fastening method, such as an interference fit, may be employed between the oral retractor 103 and the housing 1010.

[0081] A first hole 1012 and a second hole 1013 are formed in the working surface 1011. These allow a first-band light source (not shown) mounted within the chamber to illuminate the teeth exposed by the oral retractor 103 when the patient's lips and cheeks are opened, through the first hole 1012. Furthermore, a camera 1015 fixedly mounted within the chamber can capture images of the teeth illuminated by the first-band light source through the second hole 1013 and a second-band filter 1016 positioned in front of the camera 1015. The mounting position and angle of the camera 1015 allow it to capture appropriate images of the patient's teeth through the oral retractor 103.

[0082] In one embodiment, a first hole 1012 may be provided on both sides of the second hole 1013, or two or more first holes 1012 may be provided on both sides of the second hole 1013, or one or more first holes 1012 may be provided at designated locations according to detection requirements.

[0083] When in use, the first end of the oral retractor 103 can be placed into the patient's mouth to stretch the lips and cheeks to expose the teeth, so that the camera 1015 can collect images of the teeth through the oral retractor 103. At this time, the patient's lips and cheeks rest against the flange 1033, making it difficult for the oral retractor 103 to fall out of the patient's mouth.

[0084] The tube 1017 of the housing 1010 and the tube 1031 of the oral retractor 103 form a shielding tube. If the first end of the oral retractor 103 is closed, the working surface 1011 of the housing 1010 and the shielding tube form a closed cavity to prevent ambient light from affecting the quality of the tooth image captured by the camera 1015.

[0085] In light of this disclosure, it will be appreciated that the lengths of barrels 1017 and 1031 may be varied, and the following are several different configurations.

[0086] In one embodiment, no tube is formed on the housing 1010 , and the tube 1031 of the oral retractor 103 is sleeved on the edge of the working surface 1011 of the housing 1010 .

[0087] In yet another embodiment, the barrel 1017 of the housing 1010 is longer and the oral retractor 103 does not form a barrel.

[0088] In another embodiment, the housing 1010 , the shielding cylinder and the oral retractor 103 may be integrally formed.

[0089] In another embodiment, the housing 1010 and the oral retractor 103 are connected by a socket connection via an independent adapter tube.

[0090] All the above different embodiments of the shielding tube can be described as extending from the edge of the working surface 1011 to form the shielding tube. Here, "extending" does not mean that the shielding tube and the shell 1010 are integrally formed, but it encompasses the above various different situations.

[0091] In accordance with the present disclosure, in one embodiment, the working surface 1011 may be a plane. In another embodiment, the working surface 1011 may be a curved surface. It is understood that in addition to a plane and a curved surface, the working surface 1011 may be a surface of any suitable shape.

[0092] In one embodiment, the second hole 1013 can be sealed with a lens (e.g., a glass or resin lens), and the camera 1015 installed in the housing can capture images through the lens, and the lens can prevent dust or moisture from entering the housing. In another embodiment, the camera 1015 can slightly extend out of the second hole 1013, and a sealant (e.g., a rubber ring or adhesive) can be used to seal the gap between the outer wall of the camera 1015 and the second hole 1013 to prevent dust or moisture from entering the housing.

[0093] Similarly, in one embodiment, the first aperture 1012 can also be sealed with a lens. The first wavelength light source mounted within the housing can illuminate the teeth exposed by the mouth retractor 103 when the patient's lips and cheeks are opened. The lens can prevent dust or moisture from entering the housing. In another embodiment, the first wavelength light source can extend beyond the first aperture 1012, with a sealant sealing the gap between the outer wall of the first wavelength light source and the first aperture 1012 to prevent dust or moisture from entering the housing.

[0094] In one embodiment, at least one third hole (not shown) can be formed at a suitable location on the working surface 1011, so that at least one illumination light source installed in the chamber can provide illumination through the at least one third hole, thereby ensuring the quality of the image captured by the camera 1015 after the first-band light source is turned off. In one embodiment, multiple third holes can be evenly arranged around the second hole 1013.

[0095] The third hole can also be treated in the same manner as the first and second holes, and sealed with a lens, and the illumination light source can also extend out of the third hole. Detailed treatment methods can be found in the above content.

[0096] Specifically, the illumination light source may be a continuous light source, such as a light emitting diode (LED) white light, or an instantaneous light source, such as a flash light, or a combination of a continuous light source and an instantaneous light source.

[0097] In this embodiment, the second wavelength filter can be removably installed in the shielding tube, for example, magnetically attached to the module where the camera is located. Due to some common observation needs, such as observing the overall condition of teeth, observing the distribution of teeth, observing the condition of caries, etc., only the illumination light source can be used for illumination, and the first wavelength light source is no longer needed to provide illumination. In this case, no other colors of light will be generated on the tooth surface, and the second wavelength filter 1016 is no longer needed to be installed. The installed second wavelength filter 1016 needs to be removed. The removed second wavelength filter 1016 can be attached to a designated position or a suitable position on the housing 1010, or it can be directly placed in another position outside the housing.

[0098] In addition to being removably mounted within the shielding tube, the second wavelength filter can also be fixedly mounted in other ways. For example, it can be glued to the working surface 1011, with the portion that performs the filtering function positioned corresponding to the second hole. The glue can be applied to the portion that does not perform the filtering function, such as the plastic frame. Alternatively, for example, a layer of rubber can be provided on the exterior of the second wavelength filter and pressed against the working surface 1011, with the portion that performs the filtering function positioned corresponding to the second hole.

[0099] The shape of the second band filter can be adapted according to the shape of the installation location.

[0100] In the dental plaque detection device 100 provided in the present disclosure, a control button 1021 is provided on the side wall of the main body 101 for the user to operate the dental imaging device 100. A charging port 1023 is provided at the bottom of the main body 101 for charging the main body 101.

[0101] In one embodiment, a control device (e.g., a control circuit module) and a battery (not shown) are installed within the housing of the host 101. Electrical connections are formed between the camera 1015, the first wavelength light source, the illumination light source, the control device, and the battery. The control device is used to control image acquisition by the camera 1015 and the turning on and off of the first wavelength light source and the illumination light source. The battery provides power to the control device, the camera 1015, the first wavelength light source, and the illumination light source. In one embodiment, the camera 1015, the first wavelength light source, the illumination light source, the control device, and the battery are installed within a sealed chamber of the housing 1010.

[0102] During actual use, there can be two usage states. When it is necessary to detect dental plaque on the teeth, the first band light source is controlled to be turned on and the illumination light source is turned off. At this time, the second band filter 1016 needs to remain installed, and the first end of the oral retractor 103 can be placed in the patient's mouth to stretch the lips and cheeks to expose the teeth, so that the camera 1015 can capture the image of the teeth illuminated by the first band light source through the oral retractor 103 and the second band filter 1016; when it is necessary to observe the normal state of the teeth, the first band light source is controlled to be turned off and the illumination light source is turned on. At this time, the camera will capture the image of the teeth illuminated by normal white light, and the filtering function of the second band filter 1016 is no longer needed. The second band filter 1016 needs to be removed, and the first end of the oral retractor 103 can be placed in the patient's mouth to stretch the lips and cheeks to expose the teeth, so that the camera 1015 can directly capture the image of the teeth illuminated by the ordinary illumination light source through the oral retractor 103. When the camera is collecting images of the teeth, the patient's lips and cheeks rest against the flange 1033 , so that the oral retractor 103 is not likely to fall out of the patient's mouth.

[0103] The disclosed embodiment does not require any reagent to be applied in the oral cavity. The user only needs to hold the outer shell of the handheld device and place the oral retractor into the oral cavity to be tested. Since the porphyrin compounds produced by dental plaque metabolism will produce fluorescence of different colors (such as red fluorescence) from other tooth structures under the irradiation of specific band light (such as violet light / ultraviolet light), dental plaque detection can be achieved by illuminating the image of the teeth in the oral cavity with the first band light source captured by the camera output by the display device. The operation is simple and no part of the tooth will be missed in the detection, thereby improving the efficiency and reliability of dental plaque detection.

[0104] The dental plaque detection device provided by the present disclosure, in an embodiment of the present disclosure, allows the user to flexibly place the direction and position of the oral retractor so that the camera can capture images of five views of the teeth, namely the upper occlusal surface, lower occlusal surface, frontal view, left view, and right view, thereby realizing the detection of dental plaque in the entire mouth and effectively improving the reliability of dental plaque detection.

[0105] The dental plaque detection device provided by the present disclosure can effectively improve the user experience.

[0106] The dental plaque detection device provided by the present disclosure has a simple design structure and low cost.

[0107] The above specific embodiments do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure shall be included within the scope of protection of this disclosure.

Claims

1. A dental plaque detection device, characterized in that, The dental plaque detection device includes a housing, a shielding cylinder, an oral retractor, a first-band light source, a second-band filter, and a camera; wherein, The housing forms a chamber and a working surface, the working surface is a part of the surface surrounding the formed chamber, and a first hole and a second hole are formed on the working surface. The first-band light source and the camera are fixedly installed in the chamber. The shielding cylinder extends from the edge of the working surface. The second-band filter is installed in the shielding cylinder. The oral retractor extends from the end of the shielding cylinder and is used to open the patient's lips and cheeks to expose the teeth. The first-band light source is installed so that it can irradiate the teeth exposed by the oral retractor opening the patient's lips and cheeks through the first hole and the shielding cylinder. The camera is installed so that it can collect an image of the teeth irradiated by the first-band light source through the second hole, the shielding cylinder, and the second-band filter.

2. The dental plaque detection device according to claim 1, characterized in that, If the oral retractor is closed, the working surface and the shielding cylinder form a closed chamber.

3. The dental plaque detection device according to claim 1, characterized in that, The first-band light source includes a violet light source or an ultraviolet light source.

4. The dental plaque detection device according to claim 1, wherein, The second-band filter is fixedly installed in the shielding cylinder or detachably installed in the shielding cylinder, so that the filtering range of the second-band filter covers the acquisition range of the camera.

5. The dental plaque detection device according to claim 1, characterized in that, The second-band filter includes a long-pass filter.

6. The dental plaque detection device according to claim 1, characterized in that, The chamber is a closed chamber.

7. The dental plaque detection device according to claim 1, characterized in that, The edge contour of the cross-section of the shielding cylinder is an oval symmetric up and down and left and right.

8. The dental plaque detection device according to claim 1, characterized in that, One section of the shielding cylinder is integrally extended from the housing towards the oral retractor, and the other section of the shielding cylinder is integrally extended from the oral retractor towards the housing. The two sections of the shielding cylinder are connected by socketing.

9. The dental plaque detection device according to claim 8, wherein Snap structures are respectively provided at the docking positions of the two sections of the shielding cylinder, so that the two sections of the shielding cylinder remain relatively fixed.

10. The dental plaque detection device according to claim 1, wherein The shielding cylinder is integrally extended from the oral retractor towards the housing, and the shielding cylinder is sleeved on the edge of the working surface.

11. The dental plaque detection device according to claim 10, characterized in that, Snap structures are respectively provided at one end of the shielding cylinder close to the housing and the edge of the working surface, so that the shielding cylinder and the housing remain relatively fixed.

12. The dental plaque detection device according to claim 1, wherein, The first end of the shielding cylinder is sleeved on the edge of the working surface, and the second end of the shielding cylinder opposite to the first end is sleeved on the oral retractor.

13. The dental plaque detection device according to claim 12, characterized in that, Snap structures are respectively provided at the first end of the shielding cylinder and the edge of the working surface, so that the shielding cylinder and the housing remain relatively fixed. Snap structures are respectively provided at the docking positions of the second end of the shielding cylinder and the oral retractor, so that the shielding cylinder and the oral retractor remain relatively fixed.

14. The dental plaque detection device according to claim 1, characterized in that, The relative position of the second hole and the shielding cylinder along the working surface is pre-designed.

15. The dental plaque detection device according to any one of claims 1-14, characterized in that, The dental plaque detection device further includes N lighting sources installed in the chamber. N third holes corresponding to the N lighting sources are formed on the working surface, so that the N lighting sources provide illumination for the camera to collect images after the first-band light source is turned off. N is a natural number greater than or equal to 1.

16. The dental plaque detection device according to claim 15, wherein, N is a natural number greater than 1, and the N third holes are evenly distributed around the camera.

17. The dental plaque detection device according to claim 15, characterized in that, The dental plaque detection device further includes a control device installed in the chamber. The control device is electrically connected to the first-band light source, the camera, and the N illumination light sources, and is configured to control the first-band light source, the camera, and the N illumination light sources.

18. The dental plaque detection device according to claim 17, wherein, The dental plaque detection device further includes a battery installed in the chamber. The battery is electrically connected to the control device, the first-band light source, the camera, and the N illumination light sources to supply power to them.

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