Oral cavity shooting device convenient to operate and modeling system

Abstract

The utility model discloses an oral cavity shooting device convenient to operate and a modeling system.The oral cavity shooting device convenient to operate comprises a holder used for being mutually positioned with oral cavity tissue, and the portion, close to the lip, of the holder is provided with a matching part; the restraining piece is rotationally matched with the matching part, and an arc-shaped track is defined by the restraining piece; the shooting arm is in sliding fit with the restraining part and moves around a dental arch curve of the tooth tissue on the arc-shaped track, and a plurality of imaging devices are arranged on the shooting arm at intervals; one end of the control arm is connected to the shooting arm, and the other end extends out of the oral cavity; the control arm drives the shooting arm to slide relative to the restraining part and / or the restraining part rotates relative to the holder so as to change the position and posture of the imaging device relative to the tooth tissue. The holder and the restraining part are used for restraining the shooting arm through movement, so that a patient can conveniently drive the shooting arm to move in the oral cavity through the control arm so as to obtain clear, stable and multi-view images, and the use experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oral cavity scanning, in particular to an oral cavity photographing device convenient to operate and a modeling system. BACKGROUND

[0002] Orthodontic reexamination is crucial to ensure the smooth progress of the tooth correction process. Through regular reexamination, the doctor can monitor the movement of the teeth, judge whether it is necessary to adjust the orthodontic device in time and whether it is necessary to add auxiliary devices to cope with possible changes in the teeth, so as to ensure the smooth progress of the correction and ultimately obtain an ideal tooth arrangement and occlusion.

[0003] Currently, doctors often take photos of the patient's mouth when they perform orthodontic reexamination, and compare them with the patient's initial photos to judge the movement of the teeth. When the patient cannot come to the clinic for reexamination, the doctor will ask the patient to take several independent two-dimensional photos using a mobile phone and send them to the doctor for evaluation. Due to the large size of the mobile phone and the inability to observe in real time during the shooting process, this method can only obtain relatively local and fixed two-dimensional images, and may not provide the doctor with the desired information. There are existing technologies that can explore the inside of the oral cavity, but due to the patient's level of operation, there are often difficulties in operation, and often because the entire tooth cannot be completely photographed, the shooting angle is not good, etc., which cannot reflect the true situation of the oral cavity, so that the doctor cannot clearly and accurately perform remote reexamination. Some devices even have the risk of scratching the oral mucosa when moving in the mouth.

[0004] Therefore, how to reduce the learning cost and enable patients to easily obtain clear, stable, multi-angle and comprehensive information of the oral cavity has become a problem for those skilled in the art. CONTENT OF THE INVENTION

[0005] In order to solve the above technical problems, an oral cavity photographing device convenient to operate is disclosed in an embodiment of the present application, which is used for imaging the teeth in the oral cavity, comprising:

[0006] A holder is used for mutual positioning with the oral tissue, and the holder is provided with a cooperating part near the lip;

[0007] A constraint member is rotationally fitted in the cooperating part, and the constraint member defines an arc-shaped track;

[0008] A photographing arm is slidingly fitted in the constraint member and moves around the dental arch curve of the tooth tissue on the arc-shaped track, and a plurality of imaging devices are arranged at intervals on the photographing arm;

[0009] A control arm is connected to one end of the photographing arm and extends to the outside of the oral cavity;

[0010] The control arm drives the shooting arm to slide relative to the constraint and / or the constraint to rotate relative to the holder to change the position and posture of the imaging device relative to the tooth tissue.

[0011] The following also provides several optional modes, but not as an additional limitation of the above general scheme, just a further supplement or preferred, without technical or logical contradiction, each optional mode can be combined alone for the above general scheme, but also can be combined between multiple optional modes.

[0012] In one embodiment, the holder comprises:

[0013] A pair of constraint grooves, the inside of each constraint groove is used to accommodate and position the lip;

[0014] An elastic arm connected to each constraint groove and maintaining the relative position of each constraint groove;

[0015] The matching part is a shaft hole arranged on the opposite side of the two constraint grooves, and the constraint is inserted into the corresponding shaft hole to realize rotational matching.

[0016] In one embodiment, the constraints are arranged in groups and each constraint is matched with the corresponding side constraint groove, and the constraint comprises:

[0017] A first body, one end of which is a plug-in part for plug-in matching with the shaft hole, and the other end is a first sliding part matched with the shooting arm;

[0018] A second body provided with a second sliding part matched with the shooting arm;

[0019] The first sliding part and the second sliding part define the arc-shaped track by matching with each other.

[0020] In one embodiment, the shooting arm is C-shaped and divided into a shooting segment provided with the imaging device and a sliding segment slidingly matched with the constraint, and the shooting segment is located at least at both ends of the shooting arm.

[0021] In one embodiment, the shooting segment is provided with three parts and comprises:

[0022] A first shooting segment and a second shooting segment, respectively located at both ends of the C-shaped shooting arm;

[0023] A third shooting segment located at the middle of the C-shaped shooting arm and outside the oral cavity, and the control arm is connected to the side of the third shooting segment away from the tooth tissue.

[0024] In an embodiment, the shooting arm has a first limit position where the first shooting section abuts against the constraint member, and a second limit position where the second shooting section abuts against the constraint member.

[0025] The first shooting section and the second shooting section are provided with two end arc sections opposite to each other, and when the shooting arm is in the first limit position or the second limit position, the first shooting section or the second shooting section drives the corresponding side buccal tissue away from the dental tissue.

[0026] In an embodiment, the sliding section and / or the first shooting section and / or the second shooting section are transparent, and the third shooting section is provided with a light source towards the sliding section.

[0027] In an embodiment, the sliding section is provided between adjacent shooting sections, and the sliding section is provided with a smaller diameter than the shooting sections, and the shooting sections and the sliding section are smoothly connected.

[0028] In an embodiment, the surface of the shooting section is provided with a heating net, and the heating net avoids the light path of the imaging device.

[0029] An embodiment of the present application further discloses a modeling system, comprising:

[0030] The oral cavity shooting device for facilitating operation according to the technical solutions of the present application;

[0031] The host computer is connected to the oral cavity shooting device for facilitating operation, and calculates a three-dimensional model of the dental tissue in the oral cavity based on a neural radiance field model according to the image obtained by the imaging device.

[0032] The technical solutions disclosed in the present application keep the holder and the constraint member to constrain the shooting arm through movement, so that the patient can conveniently drive the shooting arm to move in the oral cavity through the control arm to obtain clear, stable, and multi-view images, and improve the use experience.

[0033] Specific beneficial technical effects will be further explained in the specific embodiments in combination with specific structures or steps. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 FIG. 1 is a structural schematic diagram of an oral cavity shooting device for facilitating operation according to an embodiment of the present application;

[0035] Figure 2 FIG. 2 is a cooperation schematic diagram of a holder, a constraint member, and a shooting arm of the oral cavity shooting device for facilitating operation according to an embodiment of the present application;

[0036] Figure 3 FIG. 3 is a top view schematic diagram of the oral cavity shooting device for facilitating operation according to an embodiment of the present application;

[0037] Figure 4 Schematic diagram of the movement of the shooting arm of the oral cavity shooting device on the arc-shaped track (the shooting arm moves in the direction of the arrow) for easy operation;

[0038] Figure 5 Schematic diagram of the cooperation of the oral cavity shooting device with the dental tissue for easy operation;

[0039] Figure 6 Schematic diagram of the rotation of the restraint part of the oral cavity shooting device relative to the holder (the shooting arm moves in the direction of the arrow) for easy operation;

[0040] Figure 7 Schematic diagram of the structure of the shooting arm of the oral cavity shooting device for easy operation.

[0041] The reference signs in the drawings are explained as follows:

[0042] 100, holder; 110, restraint groove body; 120, elastic arm; 130, shaft hole;

[0043] 200, restraint part; 210, first body; 211, plug-in part; 212, first sliding part; 220, second body; 221, second sliding part;

[0044] 300, shooting arm; 310, imaging device; 320, sliding section; 331, first shooting section; 332, second shooting section; 333, third shooting section; 334, light source; 335, heating net;

[0045] 400, control arm; 410, trigger part; 420, data interface;

[0046] 900, dental tissue. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0048] It should be noted that when a component is referred to as being “connected” with another component, it can be directly connected with the other component or there can be a middle component. When a component is referred to as being “set on” another component, it can be directly set on the other component or there can be a middle component.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0050] Reference Appendix Figure 1 As shown, one embodiment of this application discloses an easy-to-operate oral imaging device for imaging teeth within the oral cavity. It includes a retainer 100 for positioning relative to oral tissues, a constraint member 200 rotatably coupled to the retainer 100, an imaging arm 300 slidably coupled to the constraint member 200, and a control arm 400 for controlling the imaging arm 300. The technical solution disclosed in this application uses the retainer 100 and constraint member 200 to restrain the movement of the imaging arm 300, allowing the patient to easily drive the imaging arm 300 within the oral cavity via the control arm 400 to obtain clear, stable, multi-view images, thus improving the user experience.

[0051] To achieve motion control of the imaging arm 300, the components are configured as follows: The retainer 100 has a mating part near the lip; the constraint member 200 rotates and engages with the mating part, defining an arc-shaped track; the imaging arm 300 slides and engages with the constraint member 200, moving along the arc-shaped track around the arch curve of the tooth tissue 900; multiple imaging devices 310 are spaced apart on the imaging arm 300; one end of the control arm 400 is connected to the imaging arm 300, and the other end extends to the outside of the oral cavity. The patient (or a doctor or other operator) can use the control arm 400 to drive the imaging arm 300 to slide relative to the constraint member 200 (e.g., with an attached...). Figure 4 (as shown) and / or the constraint 200 rotates relative to the cage 100 (e.g., attached) Figure 6 (As shown) to change the position and orientation of the imaging device 310 relative to the tooth tissue 900.

[0052] The imaging arm 300 is equipped with multiple imaging devices 310 with different viewing angles. When the imaging arm 300 moves on the arc track, the imaging devices 310 can sequentially image different areas of the tooth tissue 900. With the rotation of the constraint member 200 and the retainer, the imaging devices 310 can further expand the imaging range. The imaging ranges of each imaging device 310 can be independent or overlap for mutual verification.

[0053] For specific settings regarding cage 100, please refer to the appendix. Figure 1 To be continued Figure 3 In the illustrated embodiment, the cage 100 includes:

[0054] The constraint groove 110 is arranged in pairs, and the inside of each constraint groove 110 is used to accommodate and position the lip;

[0055] The elastic arm 120 is connected to each constraint groove 110 and keeps the relative position of each constraint groove 110.

[0056] In order to adapt to different oral cavity shapes of patients and facilitate wearing, each constraint groove 110 can be relatively far away or close to each other, and the elastic arm 120 can adapt to the distance change of each constraint groove 110 and drive each constraint groove 110 to keep at a preset position, so as to realize the mutual positioning of the holder 100 and the oral tissue. The holder 100 and the constraint part 200 can be arranged in a split body to facilitate the patient to gradually realize the wearing of the device. In the embodiment, the matching part is a shaft hole 130 arranged on the opposite side of the two constraint grooves 110, and the constraint part 200 is inserted into the corresponding shaft hole 130 to realize the rotating cooperation. Similarly, the matching part can also be a protruding shaft, and the constraint part 200 is provided with a matching hole matched with the shaft. In order to improve the wearing experience, the shaft hole 130 is provided with a first magnetic attraction part for pre-positioning, and the constraint part 200 is provided with a second magnetic attraction part matched with the first magnetic attraction part, and the first magnetic attraction part and the second magnetic attraction part are used to keep the constraint part 200 and the shaft hole 130 in the matching state.

[0057] In addition to accommodating the lip to determine the relative position of itself and the oral tissue, the constraint groove 110 can also be used to drive the oral tissue away from the tooth tissue 900, thereby providing a clear view for the imaging device 310 and avoiding obstruction. The holder 100 can be selected from the commonly used mouth openers on the market to reduce the cost. The constraint groove 110 of such a mouth opener is located at the corner part, and can be further optimized, for example, a pushing arm (not shown in the figure) is arranged to push the upper lip and the lower lip away from the tooth tissue 900. The pushing arm is arranged in groups and acts on the upper lip and the lower lip respectively.

[0058] The specific arrangement of the constraint part 200 can be referred to the accompanying drawings Figure 1 to the accompanying Figure 2 In the embodiment shown, the constraint part 200 is arranged in groups and each constraint part 200 cooperates with the corresponding side constraint groove 110. The constraint part 200 includes a first body 210 and a second body 220 which are mutually buckled.

[0059] The first body 210 has one end as a plug-in part 211 used for plug-in cooperation with the shaft hole 130, and the other end as a first sliding part 212 cooperated with the shooting arm 300;

[0060] The second body 220 is provided with a second sliding part 221 cooperated with the shooting arm 300;

[0061] The first sliding part 212 and the second sliding part 221 cooperated define an arc-shaped track.

[0062] According to the accompanyingFigure 2 The size of the first sliding part 212 and the second sliding part 221 shown in FIG. 1 can define an arc-shaped track by a single constraint 200, and the arc-shaped track defined by each constraint 200 is consistent or similar considering the structural strength. The arc-shaped track can be arranged along the extension trend of the shooting arm 300, i.e., the shooting arm 300 can move on the arc-shaped track in a non-deformed state; or the arc-shaped track can be arranged differently from the extension trend of the shooting arm 300, i.e., at least one segment of the arc-shaped track, the shooting arm 300 needs to be deformed to move on the segment.

[0063] The specific arrangement of the shooting arm 300 can be referred to the embodiments shown in FIGS. 2-4. Figure 1 Figure 5 In the embodiment shown in FIG. 3, the shooting arm 300 is C-shaped and is divided into a shooting segment provided with the imaging device 310 and a sliding segment 320 in sliding cooperation with the constraint 200, and the shooting segment is located at least at two ends of the shooting arm 300. Further, the shooting segment is provided with three parts and includes:

[0064] The first shooting segment 331 and the second shooting segment 332 are respectively located at two ends of the C-shaped shooting arm 300.

[0065] The third shooting segment 333 is located at the middle of the C-shaped shooting arm 300 and outside the oral cavity, and the control arm 400 is connected to one side of the third shooting segment 333 away from the tooth tissue 900.

[0066] The specific arrangement of the shooting arm 300 can be referred to the embodiments shown in FIGS. 2-4. Figure 4 In the embodiment shown in FIG. 3, the shooting arm 300 has a first limit position (for example, the position of the shooting arm 300 shown by the dashed line in FIG. 3) at which the first shooting segment 331 abuts against the constraint 200, and a second limit position (for example, the position of the shooting arm 300 shown by the solid line in FIG. 3) at which the second shooting segment 332 abuts against the constraint 200. Figure 4 Figure 4

[0067] ​​​The first shooting section 331 and the second shooting section 332 are arranged at the opposite ends of the arc-shaped track. When the shooting arm 300 is in the first limit position or the second limit position, the first shooting section 331 or the second shooting section 332 drives the corresponding side buccal tissue away from the dental tissue 900. This effect can be achieved by the arrangement of the shooting arm 300 or the arc-shaped track. For example, the overall curvature of the arc-shaped track is smaller than the curvature of the dental arch curve, that is, the arc-shaped track is flatter than the dental arch curve. For another example, compared with the throat part, the maximum radius of the arc-shaped track is larger than the maximum radius of the dental arch curve, that is, the arc-shaped track is located on the labial side of the dental assembly. For yet another example, the distance between the two ends of the shooting arm 300 is greater than the maximum distance between the third molars of the two cheeks of the dental tissue. When the shooting arm 300 arranged as described above is running on the arc-shaped track arranged as described above, the two ends of the shooting arm 300 contact the buccal tissue earlier than the dental tissue and achieve the pushing away effect.

[0068] In order to better arrange the relative position of the constraint 200 on the shooting arm 300, a sliding section 320 is arranged between adjacent shooting sections in the embodiment. That is, the constraint 200 slides between two adjacent shooting sections. Further, the sliding section 320 is arranged to have a smaller diameter than the shooting section, that is, the shooting section provides a limit for the relative movement between the constraint 200 and the shooting arm 300. In order to avoid extrusion or damage to the oral cavity tissue caused by the abutment of the shooting section and the constraint 200, the shooting section and the sliding section 320 are smoothly transitioned to avoid the appearance of a clamped gap.

[0069] It can be foreseen that auxiliary functions need to be provided for intraoral shooting. Referring to the embodiment shown in the drawings, Figure 7 In the embodiment shown, the auxiliary function can be to provide illumination. In the embodiment, the sliding section 320 and / or the first shooting section 331 and / or the second shooting section 332 are transparently arranged, and the third shooting section 333 is provided with a light source 334 facing the sliding section 320. The transparent arrangement means that light can pass through, for example, a frosted finish can also be the transparent arrangement mentioned above. The transparently arranged part can either disperse light to the inside of the oral cavity to achieve illumination or can achieve light guiding to expand the illumination range. This arrangement can simplify the arrangement of the light source 334 and achieve a multi-angle and large-range illumination effect in the oral cavity with a smaller light-emitting area. In the embodiment, the light source 334 is provided with two light sources and is arranged on the two sides of the third shooting section 333, respectively. The two light sources 334 emit light towards different sliding sections 320, respectively. The light source 334 is embedded in the inside of the shooting arm 300.

[0070] The auxiliary function can also be to eliminate fogging. This can be achieved by providing an anti-fog coating on the imaging device 310. In the embodiment, the surface of the shooting section is provided with a heating net 335, and the heating net 335 avoids the light path of the imaging device 310. The heating net 335 is formed by a heating wire spirally wound on the shooting section. The heating wire is embedded on the surface of the shooting section and is electrically connected to the control arm 400.

[0071] The auxiliary function can also be saliva absorption. In this embodiment, a saliva absorption accessory (not shown in the figure) is arranged on the outer surface of the shooting arm 300. The saliva absorption accessory can be removed from the shooting arm 300 for replacement or maintenance.

[0072] In terms of overall layout, reference is made to the embodiment shown in FIG. 4. Figure 1 In the embodiment shown, the control device of the shooting device is arranged inside the control arm 400. The imaging device 310, the light source 334, the heating net 335, and the like mentioned above are electrically connected to the control arm 400. The control arm 400 is provided with a trigger 410 (button) and a data interface 420 that respond to operations. The shooting arm 300 is at least partially made of elastic material. In this embodiment, the shooting arm 300 is an integral structure formed in sections, in which the elastic coefficient of the shooting section is greater than that of the sliding section 320. The sliding section 320 is made of self-lubricating material or is provided with a friction-reducing layer on the surface.

[0073] In combination with the above, the oral cavity shooting device convenient to operate in the present application can clearly and stably obtain a plurality of views of images or image sequences of the dental tissue in the oral cavity. Based on the images or image sequences, a three-dimensional model of the dental tissue in the oral cavity can be obtained based on the three-dimensional modeling model in the prior art, further improving the convenience and accuracy of the patient, the doctor, and the processor in obtaining the data in the oral cavity of the patient. The three-dimensional modeling model based on the images or image sequences in the prior art is commonly known as the neural radiation field (NeRF) technology. The input of the neural radiation field is a plurality of images and camera parameters, and the output is a continuous three-dimensional radiation field. Specifically, the input is a set of two-dimensional images and corresponding camera parameters (including camera position and direction), and the output is a function representing the color and density of each point in a three-dimensional scene.

[0074] Therefore, an embodiment of the present application also discloses a modeling system, which comprises:

[0075] According to the oral cavity shooting device convenient to operate in the above technical solution of the present application;

[0076] The host computer is connected to the oral cavity shooting device convenient to operate and calculates a three-dimensional model of the dental tissue in the oral cavity based on the neural radiation field model according to the image obtained by the imaging device 310. The host computer can be a computer arranged in the control arm 400 or a computer connected to the oral cavity shooting device convenient to operate through the data interface 420. The host computer can directly communicate with the imaging device 310 through the data interface 420 or indirectly communicate with the imaging device 310 through the storage device. The calculation process of the host computer can be implemented in combination with the prior art, which will not be described here.

[0077] Any technical features in the above-described embodiments can be combined in any manner, and for the sake of brevity, the foregoing descriptions of various embodiments do not describe all possible combinations. However, it should be understood that any combination of these technical features, unless specifically excluded, is within the scope of the present disclosure. Technical features in different embodiments can be implemented in the same figure while the figure is regarded as disclosing a combination of the embodiments involved.

[0078] The above-described embodiments are merely illustrative for the present application and are not to be understood in an limiting sense. It should be noted that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these modifications and improvements are also within the scope of the present application.

Claims

1. An oral imaging device for imaging teeth in an oral cavity, the device being easy to operate, characterised in that, The application relates to a dental imaging device, comprising: a holder for positioning with oral tissues, the holder being provided with a matching part near the lips; a constraint member rotatably matched with the matching part, the constraint member defining an arc-shaped track; a shooting arm slidably matched with the constraint member and moving along the arc-shaped track to surround the dental arch curve of the dental tissues, the shooting arm being provided with a plurality of imaging devices at intervals; a control arm connected to one end of the shooting arm and extending to the outside of the oral cavity; the control arm drives the shooting arm to slide relative to the constraint member and / or the constraint member to rotate relative to the holder to change the position and posture of the imaging devices relative to the dental tissues.

2. The oral imaging apparatus of claim 1, wherein, The holder comprises: a pair of constraint grooves, the interiors of the constraint grooves being used for accommodating and positioning the lips; elastic arms connected to the constraint grooves and keeping the relative positions of the constraint grooves; the matching part is a shaft hole arranged on the opposite side of the two constraint grooves, and the constraint member is inserted into the corresponding shaft hole to realize the rotatable matching.

3. The oral imaging apparatus of claim 2, wherein, The constraint members are arranged in groups, and each constraint member is matched with the constraint groove on the corresponding side, the constraint member comprising the following which are matched with each other: a first body, one end of the first body being an insertion part for being inserted into the shaft hole, and the other end being a first sliding part matched with the shooting arm; a second body, the second body being provided with a second sliding part matched with the shooting arm; the first sliding part and the second sliding part define the arc-shaped track.

4. The oral imaging apparatus of claim 1, wherein, The shooting arm is C-shaped and is divided into a shooting section provided with the imaging devices and a sliding section slidably matched with the constraint member, and the shooting section is located at least at two ends of the shooting arm.

5. The oral imaging apparatus of claim 4, wherein, The shooting section is provided with three parts and comprises: a first shooting section and a second shooting section, respectively located at two ends of the C-shaped shooting arm; a third shooting section located at the middle of the C-shaped shooting arm and outside the oral cavity, and the control arm is connected to one side of the third shooting section away from the dental tissues.

6. The oral imaging apparatus of claim 5, wherein, The shooting arm has a first limit position where the first shooting section abuts against the constraint member and a second limit position where the second shooting section abuts against the constraint member; the two ends of the first shooting section and the second shooting section are provided with circular arcs, and when the shooting arm is at the first limit position or the second limit position, the first shooting section or the second shooting section drives the buccal tissue on the corresponding side to move away from the dental tissues.

7. The oral imaging apparatus of claim 5, wherein, The sliding section and / or the first shooting section and / or the second shooting section are transparent, and the third shooting section is provided with a light source towards the sliding section.

8. The oral imaging device of claim 4, wherein, The sliding section is arranged between adjacent shooting sections, the sliding section is provided with a smaller diameter than the shooting section, and the shooting section and the sliding section are smoothly connected.

9. The oral imaging apparatus of claim 4, wherein, The surface of the shooting section is provided with a heating net, and the heating net avoids the light path of the imaging devices.

10. A modeling system characterized by, The application further relates to a dental imaging device, comprising: the dental imaging device according to any one of claims 1 to 9; a host computer connected to the dental imaging device and used for calculating a three-dimensional model of the dental tissues in the oral cavity based on a neural radiation field model according to the images obtained by the imaging devices.

Images