KR20230141611A - An intraoral image processing apparatus, and an intraoral image processing method - Google Patents

Abstract

The disclosed embodiments relate to an oral image processing method and an oral image processing device. The oral image processing method according to one embodiment includes acquiring three-dimensional oral data obtained by scanning the oral cavity including teeth, the three-dimensional oral data Based on the base, generating a base, based on a reference curve of the base, generating one or more cylinders such that the one or more cylinders penetrate the wall of the base, receiving a user input to move a first one of the one or more cylinders. moving the first cylinder along the reference curve of the base based on the user input, and deleting data corresponding to one or more cylinders from the tooth model data including the base, thereby creating one or more drain holes. It may include steps.

Description

An intraoral image processing apparatus, and an intraoral image processing method}

The disclosed embodiments relate to an oral image processing device and an oral image processing method, and specifically, to an oral image processing device and a processing method for creating a drain hole in tooth model data.

There are many different areas of dental treatment for patients. Examples of dental treatment fields include orthodontic treatment and prosthetic treatment. A model of the patient's teeth may be needed for orthodontic orthodontic treatment. A tooth model can be objective data that shows the appearance before, during, and after orthodontic treatment. In addition, it is easy to directly observe parts that are difficult to observe directly due to limited space in the oral cavity by making a tooth model. In addition, it is possible to accurately measure the space required to eliminate overhanging teeth, protruding teeth, and eliminating spaces. Additionally, when a doctor consults with a patient, it can serve as objective data to show the patient's oral condition and help the patient's understanding. Additionally, devices that are difficult to make directly can be modeled inside the patient's mouth.

These tooth models are produced by 3D printers, and the manufacturing process of the 3D printer requires materials (resin). At this time, the tooth model is often produced as a hollow model to save material (resin). In order to manufacture a tooth model as a hollow model, a drain hole is required to remove the resin inside the tooth model.

More specifically, the drain hole is used to remove internal pressure or discharge resin to the outside when attaching the bottom surface of a hollow model to a build plate. Alternatively, the drain hole is used to save resin material or printing time when producing a tooth model as a hollow model. Alternatively, the drain hole is used to easily remove the tooth model from the build plate after the printing process of the tooth model.

Therefore, in order to manufacture a tooth model as a hollow model, it is necessary to create a drain hole in the tooth model.

The disclosed embodiment aims to provide a method for processing an oral image for creating a drain hole in a tooth model, and a device for performing the operation accordingly.

An oral image processing method according to an embodiment includes acquiring 3D oral data by scanning the oral cavity including teeth, generating a base based on the 3D oral data, and based on a reference curve of the base. Thus, generating the one or more cylinders so that the one or more cylinders penetrate the wall of the base, receiving a user input to move a first cylinder among the one or more cylinders, based on the user input, the first cylinder 1 Moving a cylinder along a reference curve of the base, and deleting data corresponding to the one or more cylinders from tooth model data including the base, thereby creating one or more drain holes. .

The reference curve of the base according to one embodiment may include at least one of an inner boundary of the base, an outer boundary of the base, and a curve connecting points located in the middle in the thickness direction of the base.

The direction of the central axis of each of one or more cylinders according to an embodiment may be parallel to the direction of the normal vector of the point where the central axis and the reference curve intersect.

The step of moving the first cylinder along the reference curve of the base according to one embodiment includes generating a virtual ray in a direction perpendicular to the screen from a first point on the screen corresponding to the user input, It may include determining a second point on the reference curve that has the shortest distance from a virtual ray, and moving the first cylinder so that the second point is located on the central axis of the first cylinder. .

The step of determining the second point according to one embodiment includes having the shortest distance with the virtual ray within a preset distance from a third point on the reference curve where the central axis of the first cylinder intersects before moving. It may include determining the second point on the reference curve.

The step of moving the first cylinder along the reference curve of the base according to one embodiment may include moving the first cylinder while maintaining the distance between the central axis of the first cylinder and the reference surface of the base. You can.

The oral image processing method according to one embodiment may further include displaying the tooth model data in which the one or more drain holes are created.

The oral image processing method according to one embodiment may further include obtaining the tooth model data by generating mesh data extending from an edge of the 3D oral data to the base.

Generating one or more cylinders according to an embodiment includes receiving user input about the number of the one or more cylinders, the diameter of the one or more cylinders, and the distance from the reference surface of the base to the one or more cylinders. It can be included.

The step of generating one or more cylinders according to an embodiment further includes determining the position of the one or more cylinders based on the number of the one or more cylinders and the distance from the reference surface of the base to the one or more cylinders. It can be included.

Generating one or more cylinders according to an embodiment includes determining heights of side surfaces of the cylinders such that the one or more cylinders penetrate a wall of the base, and based on the determined heights of the sides, the one or more cylinders may penetrate the wall of the base. It may include the step of generating cylinders.

An oral image processing device according to an embodiment includes a display, a user interface, a memory storing one or more instructions, and a processor, wherein the processor executes the one or more instructions stored in the memory, thereby processing teeth. Acquire three-dimensional oral data by scanning the oral cavity, create a base based on the three-dimensional oral data, and based on a reference curve of the base, one or more cylinders so that the one or more cylinders penetrate the wall of the base. control the display to display the generated one or more cylinders, and receive, through the user interface, a user input to move a first one of the one or more cylinders, and based on the user input, One or more drain holes can be created by moving the first cylinder along the reference curve of the base and deleting data corresponding to the one or more cylinders from tooth model data including the base.

The oral image processing device and oral image processing method according to the disclosed embodiment can create a drain hole so that the drain hole penetrates the wall of the base. Accordingly, when manufacturing a tooth model as a hollow model, the internal material (eg, resin) can be easily discharged to the outside through the drain hole, thereby saving resin material and reducing printing time.

The oral image processing device and oral image processing method according to the disclosed embodiment can manually adjust the position of the automatically generated drain hole, thereby avoiding unintended results when generating final tooth model data.

The oral image processing device and oral image processing method according to the disclosed embodiment allow the user to easily and accurately control the position of the drain hole by allowing the drain hole to move along the reference curve of the base when manually adjusting the position of the drain hole. You can do it.

The present invention may be readily understood by combination of the following detailed description with the accompanying drawings, where reference numerals refer to structural elements.
1 is a diagram for explaining an oral image processing system according to a disclosed embodiment.
FIG. 2 is a diagram referenced to explain an operation in which an oral image processing device acquires scan data to generate tooth model data according to an embodiment.
Figures 3 and 4 are diagrams for explaining an operation of creating a drain hole by an oral image processing device according to an embodiment.
FIG. 5 is a diagram illustrating an operation of determining the location of a drain hole by an oral image processing device according to an embodiment.
Figures 6 to 8 are diagrams for explaining an operation of an oral image processing device moving a drain hole based on a user input, according to an embodiment.
FIGS. 9 to 12 are diagrams for explaining the operation of an oral image processing device according to an embodiment when information about a drain hole is changed after adjusting the position of a cylinder.
FIG. 13 is a diagram illustrating an example in which an oral image processing device creates a drain hole according to an embodiment.
FIG. 14 is a diagram illustrating an operation of an oral image processing device to generate tooth model data according to an embodiment.
Figure 15 is a flowchart showing an oral image processing method according to an embodiment.
Figure 16 is a block diagram showing an oral image processing device according to an embodiment.

This specification clarifies the scope of rights of the present invention, explains the principles of the present invention, and discloses embodiments so that those skilled in the art can practice the present invention. The disclosed embodiments may be implemented in various forms.

Like reference numerals refer to like elements throughout the specification. This specification does not describe all elements of the embodiments, and general content or overlapping content between the embodiments in the technical field to which the present invention pertains is omitted. The term 'part' (portion) used in the specification may be implemented as software or hardware, and depending on the embodiment, a plurality of 'portions' may be implemented as a single element (unit, element) or as a single 'portion'. It is also possible for 'boo' to contain plural elements. Hereinafter, the operating principle and embodiments of the present invention will be described with reference to the attached drawings.

In this specification, an image may include an image representing at least one tooth or an oral cavity including at least one tooth (hereinafter referred to as an 'oral image').

Additionally, in this specification, an image may be a two-dimensional image of an object, a three-dimensional model or a three-dimensional image representing the object in three dimensions. Additionally, in this specification, an image may refer to data required to represent an object in two or three dimensions, for example, raw data obtained from at least one image sensor. Specifically, raw data is data acquired to generate an oral image, and is obtained from at least one image sensor included in the intraoral scanner when the inside of the oral cavity of the subject, a patient, is scanned using an intraoral scanner. It may be acquired data (for example, two-dimensional data).

In this specification, 'object' refers to teeth, gingiva, at least some areas of the oral cavity, and/or artificial structures that can be inserted into the oral cavity (e.g., orthodontic devices, implants, artificial teeth, orthodontic aids inserted into the oral cavity, etc. ), etc. may be included. Here, the correction device may include at least one of a bracket, an attachment, a correction screw, a lingual correction device, and a removable correction retainer.

Hereinafter, embodiments will be described in detail with reference to the drawings.

1 is a diagram for explaining an oral image processing system according to a disclosed embodiment.

Referring to FIG. 1, the oral image processing system includes an oral scanner 10 and an oral image processing device 100.

The intraoral scanner 10 according to one embodiment is a device that scans an object and is a medical device for acquiring images within the oral cavity. Additionally, the oral scanner 10 may scan at least a part of the patient's body, such as the patient's face, or a model of teeth, in addition to the oral cavity.

In FIG. 1, the intraoral scanner 10 is shown as a handheld scanner that a user holds in his/her hand and scans an object, but it is not limited thereto. The intraoral scanner 10 installs a tooth model and moves around the installed tooth model. It may include forms such as a model scanner that scans.

Specifically, the oral scanner 10 may be a device for acquiring an image of the oral cavity including at least one tooth by being inserted into the oral cavity and scanning teeth in a non-contact manner. Additionally, the oral scanner 10 may have a form that allows insertion and withdrawal into the oral cavity, and scans the inside of the patient's oral cavity using at least one image sensor (eg, an optical camera, etc.). The oral scanner 10 is an object of interest such as teeth inside the oral cavity, gingiva, and artificial structures that can be inserted into the oral cavity (e.g., orthodontic devices including brackets and wires, implants, artificial teeth, orthodontic auxiliary tools inserted into the oral cavity, etc.) In order to image at least one surface of the object, surface information about the object may be acquired as raw data.

Image data acquired from the oral scanner 10 may be transmitted to the oral image processing device 100 connected through a wired or wireless communication network.

The oral image processing device 100 is connected to the oral scanner 10 through a wired or wireless communication network, receives a two-dimensional image obtained by scanning the oral cavity from the oral scanner 10, and determines the oral cavity based on the received two-dimensional image. It can be any electronic device capable of generating, processing, displaying and/or transmitting images.

Based on the two-dimensional image data received from the oral scanner 10, the oral image processing device 100 may process the two-dimensional image data to generate information, or may process the two-dimensional image data to generate an oral image. Additionally, the oral image processing device 100 may display the generated information and oral image through the display 130.

The oral image processing device 100 may be a computing device such as a smart phone, laptop computer, desktop computer, PDA, or tablet PC, but is not limited thereto.

Additionally, the oral image processing device 100 may exist in the form of a server (or server device) for processing oral images.

Additionally, the oral scanner 10 may transmit raw data obtained through an oral scan to the oral image processing device 100 as is. In this case, the oral image processing device 100 may generate a 3D oral image representing the oral cavity in 3D based on the received raw data. The oral image processing device 100 according to one embodiment generates three-dimensional data (e.g., surface data, mesh data, etc.) that three-dimensionally represents the shape of the surface of the object, based on the received raw data. You can.

Additionally, since the '3D oral image' can be created by modeling the internal structure of the oral cavity in three dimensions based on the received raw data, it may also be called a '3D oral model'. Hereinafter, models or images representing the oral cavity in two or three dimensions will be collectively referred to as 'oral images'.

Additionally, the oral image processing device 100 may analyze, process, display, and/or transmit the generated oral image to an external device.

As another example, the oral scanner 10 acquires raw data through an oral scan, processes the acquired raw data to generate an image corresponding to the oral cavity as an object, and transmits it to the oral image processing device 100. You can. In this case, the oral image processing device 100 may analyze, process, display, and/or transmit the received image.

In the disclosed embodiment, the oral image processing device 100 is an electronic device capable of generating and displaying an oral image three-dimensionally representing the oral cavity including one or more teeth, which will be described in detail below.

When the oral image processing device 100 according to one embodiment receives raw data of scanning the oral cavity from the oral scanner 10, it processes the received raw data to generate a 3D oral image (or 3D oral model). can do. For convenience of explanation, the 3D oral image generated by the oral image processing device 100 will hereinafter be referred to as 'scan data'.

Raw data received from the oral scanner 10 may include tooth data representing teeth and gingival data representing gingiva. Accordingly, scan data generated by the oral image processing device 100 may include a tooth area and a gingival area. However, it is not limited to this.

According to one embodiment, when a tooth model is created using only the scan data 50, the upper and lower jaws included in the scan data 50 are separated, making it impossible to know the exact occlusion of the teeth. Accordingly, a tooth model must be created in a form that can attach articulation to join the upper and lower jaw. In order to create a tooth model in a form that can attach articulation, it is necessary to generate tooth model data 70 to which the base 75 is combined.

The oral image processing device 100 according to one embodiment may generate tooth model data 70 to which the base 75 is combined using the tooth area and a partial gingival area of the scan data 50. At this time, the oral image processing device 100 may expand the gingival area to the base 75 by generating three-dimensional data (eg, mesh data) between the edge of the gingival area and the base 75.

Additionally, the tooth model may be manufactured as a hollow model in which the interior of the base 75 is emptied so that less material is used. In order to manufacture a tooth model as a hollow model, a drain hole 85 is required to discharge the material (eg, resin) inside the tooth model. At this time, in order to discharge the material through the drain hole 85, the drain hole 85 must be formed to penetrate the wall of the base 75.

Hereinafter, an operation of creating a drain hole 85 by the oral image processing device 100 according to an embodiment will be described with reference to the drawings.

FIG. 2 is a diagram referenced to explain an operation in which an oral image processing device acquires scan data to generate tooth model data according to an embodiment.

The oral image processing device 100 according to an embodiment may generate scan data based on raw data acquired by the oral scanner 10. Alternatively, the oral image processing device 100 may acquire pre-stored scan data using a 'load' function or acquire scan data from an external device. However, it is not limited to this.

The oral image processing device 100 may visually output scan data 202 through the user interface screen 201. The user interface screen 201 may be the screen of the display 130 of FIG. 1 . The user interface screen 201 may include at least one menu to allow the user to analyze or process the scan data 202.

For example, the user interface screen 201 may include a base creation menu 220. Upon receiving a user input for selecting the base creation menu 220, the oral image processing device 100 may enter the base creation mode.

The oral image processing device 100 according to an embodiment may generate a base corresponding to scan data in a base generation mode, including base type, base height, whether it is a hollow model, wall thickness of the hollow model, etc. required when generating the base. Menus for setting the number of drain holes, etc. can be provided.

Figures 3 and 4 are diagrams for explaining an operation of creating a drain hole by an oral image processing device according to an embodiment.

Referring to FIG. 3, the oral image processing device 100 according to one embodiment displays a menu 310 for selecting a hollow model and a slider 320 for adjusting the thickness of the base wall in a base creation mode on a user interface screen. It can be displayed in (201). The oral image processing device 100 may receive a user input for selecting the hollow model menu 310 and a user input for adjusting the thickness of the base wall using the slider 320.

In addition, the oral image processing device 100 may display the drain hole creation menu 330 on the user interface screen 201 or activate the drain hole creation menu 330 when the hollow model is selected based on the user input. there is.

In addition, when the drain hole creation menu 330 is selected based on the user input, the oral image processing device 100 displays the drain hole setting menu 340 on the user interface screen 201, as shown in FIG. 3. It can be displayed. At this time, when the drain hole creation button 341 included in the drain hole setting menu 340 is in an off state, the menus 342, 343, and 344 for setting information about the drain hole may be deactivated. .

When receiving a user input that turns on the drain hole creation button 341, the oral image processing device 100 generates menus 342, 343 for setting information about the drain hole, as shown in FIG. 4. 344) can be activated. Menus for setting information about drain holes include the drain hole setting menu where you can set the number of drain holes, the diameter of the drain hole, and the distance from the base to the drain hole (for example, the distance from the bottom of the base to the drain hole). may include.

For example, the drain hole setting menu 340 includes a first slider 342 for controlling the number of drain holes, a second slider 343 for controlling the diameter of the drain hole, and a reference surface of the base (e.g., the top surface of the base). Alternatively, it may include a third slider 344 that can adjust the vertical height from the lower surface of the base to the drain hole. However, it is not limited to this.

When information about the drain hole is set through the drain hole setting menu 340, the oral image processing device 100 may generate one or more cylinders corresponding to one or more drain holes.

At this time, the oral image processing device 100 according to one embodiment may determine the positions of the cylinders based on the number of drain holes and the distance from the reference surface of the base to the drain hole.

The oral image processing device 100 may determine the vertical positions of the cylinders based on the distance from the reference surface of the set base to the drain hole.

For example, when the distance from the reference surface of the base to the drain hole is set to d (eg, 10 mm), the oral image processing device 100 determines the distance from the upper surface of the maxillary base 410 to the central axis of the cylinders. Adjust the vertical positions of the cylinders to be d (e.g., 10 mm), and adjust the vertical positions of the cylinders so that the distance from the lower surface of the mandibular base 420 to the central axis of the cylinders is d (e.g., 10 mm). You can. Adjusting the vertical position of the cylinders can be seen as controlling the vertical position of the reference curve of the base, which will be described later.

In Figure 4, a case where the distance from the maxillary base 410 to the cylinders and the distance from the lower base 420 to the cylinders are adjusted to be the same is shown and explained, but the case is not limited to this, and the distance from the maxillary base 410 to the cylinders is shown and explained. The distance to the cylinders and the distance from the lower jaw base 420 to the cylinders may be set differently.

Additionally, the oral image processing device 100 may determine the horizontal positions of the cylinders based on the number of drain holes and the reference curve of the base.

This will be explained in detail with reference to FIG. 5.

FIG. 5 is a diagram illustrating an operation of determining the location of a drain hole by an oral image processing device according to an embodiment.

Referring to FIG. 5 , the oral image processing device 100 may calculate the spacing between cylinders by dividing the length of the reference curve of the base by the set number of drain holes.

The reference curve of the base according to one embodiment may be one of the internal boundary 510 of the base, the external boundary 520 of the base, or the intermediate curve 530 connecting points located in the middle in the thickness direction of the base. . The vertical position of the reference curve of the base according to one embodiment may be the same as the vertical position of the cylinders. Therefore, by adjusting the vertical positions of the cylinders, the vertical position of the reference curve can also be adjusted. However, it is not limited to this.

For example, when the oral image processing device 100 uses the middle curve 530 of the base as the reference curve of the base, the length of the middle curve 530 of the base is divided by the number of drain holes to determine the gap between the drain holes (G ) can be calculated. The oral image processing device 100 determines a first point among the points included in the middle curve 530 of the base as the location of the first cylinder 551, and moves from the first point along the middle curve 530 of the base. A second point separated by the calculated spacing (G) can be determined as the location of the second cylinder 552. The oral image processing device 100 may determine the positions of one or more cylinders in the same manner. Accordingly, as the number of drain holes increases, the spacing between the cylinders becomes closer, and as the number of drain holes decreases, the spacing between the cylinders becomes distant.

Additionally, the oral image processing device 100 may determine the positions of one or more cylinders by using the inner boundary 510 of the base or the outer boundary 520 of the base as a reference curve of the base. However, it is not limited to this.

Alternatively, the oral image processing device 100 may generate cylinders corresponding to drain holes only in a preset area. For example, if the oral image processing device 100 is set to generate drain holes only in the lingual direction of the teeth for reasons such as engraving, the You can create cylinders. For example, the length of the base reference curve (e.g., one of the inner boundary, outer boundary, or middle curve) included in the base area 540 located in the lingual direction is divided by the number of drain holes to determine the distance between the drain holes. The gap can be obtained, and cylinders corresponding to the drain holes can be created only in the corresponding base area 540.

Additionally, the oral image processing device 100 may determine the direction of the central axis of the cylinder based on the reference curve of the base. For example, the oral image processing device 100 may determine the direction of the central axis of the cylinder such that the central axis of the cylinder is parallel to the direction of the normal vector of a point on the reference curve of the base that intersects the central axis of the cylinder. However, it is not limited to this.

Referring again to FIG. 4, the oral image processing device 100 may determine the diameter of the bottom of the cylinders according to the diameter of the drain hole. For example, when the diameter of the drain hole is set to 4.2 mm, the oral image processing device 100 may generate cylinders so that the diameter of the bottom of the cylinders is 4.2 mm.

Additionally, drain holes according to one embodiment must be created to penetrate the wall of the base so that the material (resin) inside can be discharged. Therefore, the height of the side surfaces of the cylinders corresponding to the drain holes must be determined so that they penetrate the wall of the base.

Meanwhile, in the case of drain holes automatically created through the drain hole setting menus 342, 343, and 344, the positions of the drain holes overlap to create a sharp part on the base surface, or a drain hole is created at the articulation position, causing articulation. may not be able to be attached, or a drain hole may be created at the label location.

Therefore, in order to adjust the positions of the automatically generated drain holes, it is necessary to manually adjust the positions of the automatically generated cylinders through user input.

The oral image processing device 100 according to one embodiment can adjust the horizontal position of the cylinder and the gap between the cylinders by dragging and moving the cylinder displayed on the user interface screen. This will be described in detail with reference to FIGS. 6 to 8.

Figures 6 to 8 are diagrams for explaining an operation of an oral image processing device moving a drain hole based on a user input, according to an embodiment.

Referring to FIG. 6, the oral image processing device 100 according to one embodiment may generate one or more cylinders corresponding to one or more drain holes.

Since the operation of the oral image processing device 100 to generate one or more cylinders has been described in detail in FIGS. 3 to 5, the same description will be omitted.

The oral image processing device 100 may receive a user input that moves at least one of the one or more cylinders. For example, the oral image processing device 100 may receive an input 620 for selecting a first cylinder 610 among one or more cylinders and dragging it a first distance in a first direction. However, the present invention is not limited to this, and the oral image processing device 100 may receive various types of user input for moving the first cylinder 610.

At this time, the first cylinder 610 has a three-dimensional coordinate value, and the user input of selecting the first cylinder 610 and dragging it a first distance in the first direction has a two-dimensional coordinate value. For example, a pointer corresponding to a user input may move on a two-dimensional screen. Additionally, the pointer corresponding to the user input can be freely moved on the screen, but the first cylinder 610 must be moved on the base 630. Therefore, a method is needed to convert movement on two-dimensional coordinates corresponding to user input into movement on the base 630.

When the oral image processing device 100 according to one embodiment receives a user input for selecting the first cylinder 610 and moving it on two-dimensional coordinates, it converts the user input with the two-dimensional coordinate value into movement on the base. Thus, the first cylinder 610 can be moved on the base 630. For example, as shown in FIG. 6, when the oral image processing device 100 receives a user input 620 that moves the first cylinder 610 by a first distance in the first direction, the base reference curve It can be moved by a second distance 640 in the second direction.

A method of converting movement on two-dimensional coordinates corresponding to a user input into movement on the base according to an embodiment will be described in detail with reference to FIG. 7.

FIG. 7 is a diagram showing a side view of the screen 701 according to one embodiment.

The oral image processing device 100 according to one embodiment may receive an input of selecting and dragging the first cylinder 610, as shown in FIG. 6. Referring to FIG. 7, the first cylinder 610 The user input 620 of selecting and dragging ) may correspond to movement from the first point 710 to the second point 720 on the screen 701.

When the oral image processing device 100 according to one embodiment receives a user input, the light ray 740 is directed from the final position corresponding to the user input, for example, from the second point 720 to the first plane 730. can be created. The first plane 730 may be a plane parallel to the screen 701 and passing through the center of the reference curve 750 of the base. However, it is not limited to this.

When the generated light ray 740 and the first plane 730 intersect at the third point 755, the oral image processing device 100 displays the screen 701 or the first plane while passing the third point 755. A straight line 760 perpendicular to 730 can be generated. The oral image processing device 100 may determine the moving position of the first cylinder 610 based on the distance between each point on the reference curve 750 of the base and the generated straight line 760.

The oral image processing device 100 according to one embodiment may determine a point on the reference curve of the base having the shortest distance from the straight line 760 as the movement position of the first cylinder 610.

However, when determining the movement position of the first cylinder 610 using the above method, there may be cases where the user's intention is not reflected.

For example, as shown in FIG. 7 , when the scan data (e.g., three-dimensional oral data) is tilted toward the screen 701, the fourth point 810 on the reference curve 750 of the base It has the shortest distance with this straight line (760).

When the fourth point 810 is determined as the movement position of the first cylinder 610, as shown in FIG. 8, the first cylinder 610 moves from the front of the base to the rear of the base. In this case, the user's intention to slightly move the position of the drain hole corresponding to the first cylinder 610 to the left cannot be reflected. In general, when an input is made to select and drag the first cylinder 610, there is a high possibility that the intention is to move the first cylinder 610 to an adjacent position.

Accordingly, the oral image processing device 100 according to one embodiment may determine the movement position of the first cylinder 610 in an area within a preset distance. The oral image processing device 100 according to one embodiment selects the point having the shortest distance from the straight line 760 among the points on the reference curve of the base located within the first critical distance from the center of the first cylinder 610 as the first cylinder. It can be determined by the moving position of (610). For example, as shown in FIG. 7, the oral image processing device 100 is configured such that the fifth point 820 on the base reference curve 780 located within a first critical distance from the center of the first cylinder 610 is a straight line. It can be determined that it has the shortest distance with (760).

The oral image processing device 100 may move the first cylinder 610 to the fifth point 820, as shown in FIG. 8 .

FIGS. 9 to 12 are diagrams for explaining the operation of an oral image processing device according to an embodiment when information about a drain hole is changed after adjusting the position of a cylinder.

As described in FIGS. 6 to 8, the oral image processing device 100 according to one embodiment changes the horizontal position of at least one cylinder based on a user input, and then changes the diameter of the cylinders while maintaining the horizontal position of the cylinders. and the vertical position can be changed.

Referring to FIG. 9 , the horizontal position of at least one cylinder located on the upper jaw base 910 may be changed based on a user input. The oral image processing device 100 may display the drain hole setting menu 920 on the user interface screen. The drain hole setting menu 920 may include menus for setting information about the drain hole, and since this is explained in detail in FIG. 3, detailed description will be omitted.

When receiving a user input for changing the diameter of the drain hole through the menu 930 for adjusting the diameter of the drain hole, the oral image processing device 100 changes the cylinders located in the maxillary base 910 and the mandibular base 915. The diameter of the cylinders can be changed while maintaining the horizontal position of the cylinders located in . For example, as shown in FIG. 10, when receiving an input to move the slider that adjusts the diameter of the drain hole to the right, the oral image processing device 100 moves the cylinders located in the maxillary base 910 and the mandibular base. The diameter of the cylinders can be increased while maintaining the horizontal position of the cylinders located at (915).

In addition, when receiving a user input for changing the vertical position of the drain hole through the menu 1010 for adjusting the distance from the base to the drain hole (e.g., the vertical position of the drain hole), the oral image processing device 100 Can change the vertical positions of the cylinders located on the upper jaw base 910 and the lower jaw base 915 while maintaining the horizontal positions of the cylinders. For example, as shown in FIG. 11, when receiving an input to move the slider that adjusts the vertical height from the reference surface of the base to the drain hole to the left, the oral image processing device 100 moves to the maxillary base 910. While maintaining the horizontal positions of the positioned cylinders and the cylinders located on the mandibular base 915, the cylinders on the maxillary base 910 are close to the upper surface of the maxillary base 910, and the cylinders on the mandibular base 915 are close to the mandibular base. The vertical position can be moved closer to the lower surface of 915.

Meanwhile, referring to FIG. 12 , the oral image processing device 100 according to one embodiment may receive a user input for changing the number of drain holes through a menu 1210 for setting the number of drain holes.

When the oral image processing device 100 according to an embodiment receives a user input that changes the number of drain holes, the positions of the manually adjusted cylinders may not be maintained. The oral image processing device 100 may generate new cylinders based on the changed number of drain holes. For example, cylinders corresponding to drain holes can be created using the automatic generation method described in FIGS. 3 to 5.

FIG. 13 is a diagram illustrating an example in which an oral image processing device creates a drain hole according to an embodiment.

Referring to FIG. 13, the base 1310 according to one embodiment may include a honeycomb structure. Additionally, the base 1310 according to one embodiment may have a hollow shape and may include a honeycomb structure. For example, honeycomb structure refers to a honeycomb-shaped structure that connects hexagons. The honeycomb structure is a stable structure that distributes force in a balanced manner. If the base according to one embodiment is created with a honeycomb structure, the shape of the base can be prevented from being deformed.

The oral image processing device 100 according to an embodiment may generate one or more drain holes in the base 1310 including a honeycomb structure based on the reference curve of the base. For example, the oral image processing device 100 may generate one or more cylinders corresponding to one or more drain holes in the base 1310 using the same method as described in FIGS. 3 to 5 .

Additionally, the oral image processing device 100 according to one embodiment may create one or more holes on the wall of the honeycomb structure. At this time, the size and number of holes can be set based on the height of the wall of the honeycomb structure (for example, the height of the base). However, it is not limited to this.

FIG. 14 is a diagram illustrating an operation of an oral image processing device to generate tooth model data according to an embodiment.

Referring to FIG. 14, the oral image processing device 100 according to an embodiment may generate tooth model data to which the base is combined using scan data. The oral image processing device 100 may expand the gingival area to the base by generating mesh data between the edge of the gingival area selected from the scan data and the base 1410. The base 1410 according to one embodiment may be created as a hollow model, and a drain hole 1420 may be created in the tooth model data.

Drain holes according to one embodiment must be created to penetrate the wall of the base so that the material (resin) inside can be discharged. Accordingly, the height of the side surfaces of the cylinders corresponding to the drain holes according to one embodiment may be determined to penetrate the wall of the base. The oral image processing device 100 may generate the drain hole 1420 by deleting data corresponding to one or more cylinders created to penetrate the wall of the base 1410 from the tooth model data.

The oral image processing device 100 according to one embodiment may control the drain hole 1420 not to be created in the tooth area. For example, when the oral image processing device 100 is set so that the drain hole 1420 is not created in the tooth area, the oral image processing device 100 may distinguish the tooth area and the gingival area in the scan data. The oral image processing device 100 may segment the tooth area and the gingival area from scan data. Segmenting the tooth area and the gingival area in scan data may mean separating the teeth included in the scan data from the gingival area. The oral image processing device 100 may segment the tooth area and the gingival area by identifying the scan data for the teeth and the scan data for the gingiva included in the scan data.

Alternatively, the oral image processing device 100 may segment the tooth area and gingival area from scan data using artificial intelligence (AI) without user input.

Alternatively, the oral image processing device 100 may segment the tooth area and the gingival area using curvature information of scan data.

When one or more cylinders overlap a tooth area, the oral image processing device 100 may not delete data corresponding to the overlapping cylinders.

Alternatively, when one or more cylinders overlap the tooth area, the oral image processing device 100 may adjust the position of the overlapping cylinder so that it is located in the gingival area or base that does not overlap the tooth area.

As shown in FIG. 14, when the drain hole 1420 is created to penetrate the wall of the base 1410 included in the tooth model data, when manufacturing a hollow tooth model using the tooth model data, the drain hole Through 1420, the internal material (eg, resin) can be easily discharged.

Figure 15 is a flowchart showing an oral image processing method according to an embodiment.

The oral image processing method shown in FIG. 15 may be performed by the oral image processing device 100.

Referring to FIG. 15, the oral image processing device 100 according to one embodiment may acquire 3D oral data (scan data) (S1510).

The oral image processing device 100 receives raw data obtained by scanning the inside of the oral cavity including teeth or by scanning a tooth model using the oral scanner 10, and based on the received raw data, scan data can be created. Alternatively, the oral image processing device 100 may acquire scan data stored in memory. Alternatively, scan data can be obtained from an external device. However, it is not limited to this.

The oral image processing device 100 may generate a base based on scan data (S1520).

For example, the oral image processing device 100 may receive a user input for selecting a base creation menu and enter the base creation mode. The oral image processing device 100 can generate a base corresponding to scan data in the base generation mode, and determines the base type, base height, whether it is a hollow model, the wall thickness of the hollow model, the number of drain holes, etc. required when creating the base. Menus that can be set can be provided.

The oral image processing device 100 may generate one or more cylinders based on the base so that the one or more cylinders penetrate the base wall (S1530).

For example, when a menu for creating a base in a hollow shape is selected, the oral image processing device 100 may provide or activate a menu for creating a drain hole. When a drain hole creation input is received, the oral image processing device 100 may provide menus for setting information about the drain hole.

When information about the drain hole including the number of drain holes, the diameter of the drain hole, the distance from the base to the drain hole, etc. is set through the drain hole setting menu, the oral image processing device 100 is configured to set the drain hole corresponding to one or more drain holes. You can create cylinders.

At this time, the oral image processing device 100 may determine the positions of the cylinders based on the number of drain holes and the distance from the base to the drain hole. Additionally, the oral image processing device 100 may determine the height of the side surfaces of one or more cylinders so that they penetrate the wall of the base.

The oral image processing device 100 according to one embodiment may receive a user input for moving a first cylinder among one or more generated cylinders (S1540).

For example, the oral image processing device 100 may receive an input for selecting a first cylinder among one or more cylinders and dragging it a first distance in a first direction. However, it is not limited to this.

The oral image processing device 100 according to one embodiment may move the first cylinder along the reference curve of the base based on the user input (S1550).

The first cylinder according to one embodiment has a three-dimensional coordinate value, and the user input has a two-dimensional coordinate value. For example, a pointer corresponding to a user input may move on a two-dimensional screen. Additionally, the pointer corresponding to the user input can move freely on the screen, but the first cylinder must move on the base. Therefore, a method is needed to convert movement on two-dimensional coordinates corresponding to user input into movement on the base.

Accordingly, when the oral image processing device 100 receives a user input to select and move the first cylinder, it converts the user input having a two-dimensional coordinate value into movement on the base and moves the first cylinder on the base. You can do it. For example, when the oral image processing device 100 receives a user input for moving the first cylinder a first distance in the first direction on two-dimensional coordinates, the oral image processing device 100 moves the first cylinder a second distance in the second direction along the reference curve of the base. It can be moved as much as

Since the method of converting movement on two-dimensional coordinates corresponding to a user input into movement on the base according to one embodiment has been described in detail in FIG. 7, detailed description will be omitted.

The oral image processing device 100 may generate one or more drain holes by deleting data corresponding to one or more cylinders from the tooth model data (S1560).

At this time, the oral image processing device 100 can distinguish the tooth area and the gingival area in the scan data and control the tooth area so that no drain hole is created. For example, when one or more cylinders overlap a tooth area, the oral image processing device 100 may not delete data corresponding to the overlapping cylinders. Alternatively, when one or more cylinders overlap the tooth area, the position of the overlapping cylinder can be adjusted so that it is located in the gingival area or base that does not overlap the tooth area.

The oral image processing device 100 according to an embodiment may display tooth model data in which drain holes are created.

Figure 16 is a block diagram showing an oral image processing device according to an embodiment.

The oral image processing method shown in FIG. 15 may be performed using the oral image processing device 100. Accordingly, the method of processing an oral image shown in FIG. 15 may be a flowchart showing the operations of the oral image processing device 100.

Referring to FIG. 16 , the oral image processing device 100 may include a communication interface 110, a user interface 120, a display 130, a memory 140, and a processor 150.

The communication interface 110 may communicate with at least one external electronic device (eg, an oral scanner 10, a server, or an external medical device) through a wired or wireless communication network. The communication interface 110 may communicate with at least one external device under the control of the processor 150.

Specifically, the communication interface 110 is at least one short-distance communication device that performs communication according to communication standards such as Bluetooth, Wi-Fi, BLE (Bluetooth Low Energy), NFC/RFID, Wifi Direct, UWB, or ZIGBEE. Can contain modules.

Additionally, the communication interface 110 may further include a long-distance communication module that communicates with a server to support long-distance communication according to long-distance communication standards. Specifically, the communication interface 110 may include a long-distance communication module that performs communication through a network for Internet communication. Additionally, the communication interface 110 may include a long-distance communication module that performs communication through a communication network compliant with communication standards such as 3G, 4G, and/or 5G.

Additionally, the communication interface 110 may include at least one port to be connected to an external electronic device (eg, an oral scanner, etc.) via a wired cable in order to communicate with the external electronic device via a wired cable. Accordingly, the communication interface 110 can communicate with a wired external electronic device through at least one port.

The user interface 120 may receive user input for controlling the oral image processing device 100. The user interface 120 includes a touch panel that detects the user's touch, a button that receives the user's push operation, and a mouse or keyboard for specifying or selecting a point on the user interface screen. May include, but is not limited to, user input devices. For example, the user interface 120 may receive user input for setting options necessary to create one or more drain holes. Additionally, the user interface 120 may receive a user input for moving at least one of the one or more cylinders created on the base.

Additionally, the user interface 120 may include a voice recognition device for voice recognition. For example, the voice recognition device can be a microphone, and the voice recognition device can receive a user's voice command or voice request. Accordingly, the processor 150 may control the operation corresponding to the voice command or voice request to be performed.

The display 130 displays a screen. Specifically, the display 130 may display a predetermined screen under the control of the processor 150. Specifically, the display 130 may display a user interface screen including an oral image generated based on data obtained by scanning the patient's oral cavity with the oral scanner 10. Alternatively, the display 130 may display a user interface screen including information related to the patient's dental treatment.

Memory 140 may store at least one instruction. Additionally, the memory 140 may store at least one instruction that the processor 150 executes. Additionally, the memory 140 may store at least one program that the processor 150 executes. Additionally, the memory 140 may store data received from the oral scanner 10 (eg, raw data obtained through an oral scan, etc.). Alternatively, the memory 140 may store an oral image representing the oral cavity in three dimensions. Memory 140 according to one embodiment may include one or more instructions for creating a drain hole in tooth model data. Memory 140 according to one embodiment may include one or more instructions for performing the method disclosed in this disclosure to create a drain hole in tooth model data.

The processor 150 executes at least one instruction stored in the memory 140 and controls the intended operation to be performed. Here, at least one instruction may be stored in the internal memory included in the processor 150 or in the memory 140 included in the data processing device separately from the processor.

Specifically, the processor 150 may execute at least one instruction and control at least one component included in the data processing device so that the intended operation is performed. Accordingly, even if the case in which the processor performs certain operations is used as an example, it may mean that the processor controls at least one component included in the data processing device so that certain operations are performed.

The processor 150 according to one embodiment generates scan data based on raw data obtained by scanning the oral cavity including teeth or scanning a tooth model by executing one or more instructions stored in the memory 140. can do. Alternatively, the processor 150 may acquire scan data previously stored in the memory or obtain scan data from an external device by executing one or more instructions stored in the memory 140.

The processor 150 may generate a base based on scan data by executing one or more instructions stored in the memory 140. The processor 150 may receive a drain hole creation input in base generation mode by executing one or more instructions stored in the memory 140. When the drain hole creation input is received, a menu for setting information about the drain hole is displayed. can provide them.

When information about the drain hole including the number of drain holes, the diameter of the drain hole, the distance from the base to the drain hole, etc. is set through the drain hole setting menu, the processor 150 executes one or more instructions stored in the memory 140. By executing, cylinders corresponding to one or more drain holes can be created.

For example, the processor 150 may determine the positions of the cylinders based on the number of drain holes and the distance from the base to the drain hole. Additionally, the processor 150 may determine the height of the side surfaces of one or more cylinders so that they penetrate the wall of the base.

When the processor 150 receives a user input for moving a first cylinder among one or more cylinders generated through the user interface 120, the processor 150 may move the first cylinder along the reference curve of the base.

The processor 150 may execute one or more instructions stored in the memory 140 to convert a user input for selecting and moving the first cylinder into movement on the base, thereby moving the first cylinder on the base. For example, when the processor 150 receives a user input for moving the first cylinder a first distance in the first direction on two-dimensional coordinates, the processor 150 moves the first cylinder a second distance in the second direction along the reference curve of the base. You can.

Since the method by which the processor 150 according to one embodiment converts movement on two-dimensional coordinates corresponding to a user input into movement on the base has been described in detail in FIG. 7, detailed description will be omitted.

The processor 150 according to one embodiment may generate one or more drain holes by executing one or more instructions stored in the memory 140 and deleting data corresponding to one or more cylinders from the tooth model data. At this time, the processor 150 can distinguish the tooth area and the gingival area in the scan data and control the tooth area so that no drain hole is created. For example, when one or more cylinders overlap a tooth area, the processor 150 may not delete data corresponding to the overlapping cylinders. Alternatively, when one or more cylinders overlap the tooth area, the position of the overlapping cylinder can be adjusted so that it is located in the gingival area or base that does not overlap the tooth area.

The processor 150 according to one embodiment may display tooth model data in which drain holes are created by executing one or more instructions stored in the memory 140.

The processor 150 according to an example internally includes at least one internal processor and a memory element (e.g., RAM, ROM, etc.) for storing at least one of programs, instructions, signals, and data to be processed or used in the internal processor. ) can be implemented in a form including.

Additionally, the processor 150 may include a graphics processor (Graphic Processing Unit) for graphics processing corresponding to video. Additionally, the processor may be implemented as a System On Chip (SoC) that integrates a core and GPU. Additionally, the processor may include multiple cores or more than a single core. For example, the processor may include dual core, triple core, quad core, hexa core, octa core, deca core, dodeca core, hexa core, etc.

In the disclosed embodiment, the processor 150 may generate an oral image based on a two-dimensional image received from the oral scanner 10.

Specifically, under the control of the processor 150, the communication interface 110 may receive data obtained from the intraoral scanner 10, for example, raw data obtained through an intraoral scan. Additionally, the processor 150 may generate a 3D oral image representing the oral cavity in 3D based on the raw data received from the communication interface 110. For example, the intraoral scanner 10 uses an L camera corresponding to the left field of view and an R camera corresponding to the right field of view to restore a 3D image according to the optical triangulation method. may include. And, the oral scanner can acquire L image data corresponding to the left field of view and R image data corresponding to the right field of view from each of the L camera and the R camera. Continuing, the oral scanner may transmit raw data including L image data and R image data to the communication interface 110 of the oral image processing device 100.

Then, the communication interface 110 transfers the received raw data to the processor 150, and the processor 150 can generate an oral image representing the oral cavity in three dimensions based on the received raw data.

Additionally, the processor 150 can control the communication interface 110 to directly receive an oral image representing the oral cavity in three dimensions from an external server, medical device, etc. In this case, the processor may acquire a 3D oral image without generating a 3D oral image based on raw data.

According to the disclosed embodiment, the processor 150 performing operations such as 'extraction', 'acquisition', and 'generation' means that the processor 150 directly performs the above-described operations by executing at least one instruction. Additionally, it may include controlling other components so that the above-described operations are performed.

In order to implement the embodiments disclosed in this disclosure, the oral image processing device 100 may include only some of the components shown in FIG. 16 or may include more components in addition to the components shown in FIG. 16. there is.

Additionally, the oral image processing device 100 may store and execute dedicated software linked to the oral scanner. Here, dedicated software may be referred to as a dedicated program, dedicated tool, or dedicated application. When the oral image processing device 100 operates in conjunction with the oral scanner 10, the dedicated software stored in the oral image processing device 100 is connected to the oral scanner 10 to store data acquired through an oral scan. You can receive real time. For example, Medit's i500 intraoral scanner product has dedicated software to process data obtained through intraoral scanning. Specifically, Medit produces and distributes 'Medit Link', software for processing, managing, using, and/or transmitting data obtained from intraoral scanners (e.g., i500). Here, 'dedicated software' refers to a program, tool, or application that can operate in conjunction with an intraoral scanner, so it may be commonly used by various intraoral scanners developed and sold by various manufacturers. Additionally, the dedicated software described above can be produced and distributed separately from the oral scanner that performs the intraoral scan.

The oral image processing device 100 can store and execute dedicated software corresponding to the i500 product. Transmission software may perform at least one operation to acquire, process, store, and/or transmit an oral image. Here, dedicated software may be stored in the processor. Additionally, dedicated software can provide a user interface for use of data acquired from an intraoral scanner. Here, the user interface screen provided by the dedicated software may include an oral image created according to the disclosed embodiment.

The method of processing oral images according to an embodiment of the present disclosure may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. Additionally, an embodiment of the present disclosure may be a computer-readable storage medium on which one or more programs including at least one instruction for executing a method of processing oral images are recorded.

The computer-readable storage medium may include program instructions, data files, data structures, etc., singly or in combination. Here, examples of computer-readable storage media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and floptical disks. Magneto-optical media such as magneto-optical media, and hardware devices configured to store and perform program instructions such as ROM, RAM, flash memory, etc. may be included.

Here, the device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory storage medium' may mean that the storage medium is a tangible device. Additionally, the 'non-transitory storage medium' may include a buffer where data is temporarily stored.

According to one embodiment, the oral image processing method according to various embodiments disclosed in this document may be included and provided in a computer program product. The computer program product may be distributed on a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)). Alternatively, it may be distributed (e.g., downloaded or uploaded) online, through an application store (e.g., Play Store, etc.) or directly between two user devices (e.g., smartphones). Specifically, the computer program product according to the disclosed embodiment may include a storage medium on which a program including at least one instruction for performing the method of processing an oral image according to the disclosed embodiment is recorded.

Although the embodiments have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims are also included in the scope of the present invention. belongs to

Claims (22)

In the oral image processing method,
Obtaining 3D oral data by scanning the oral cavity including teeth;
Generating a base based on the 3D oral data;
Based on a reference curve of the base, generating the one or more cylinders so that the one or more cylinders penetrate a wall of the base;
Receiving a user input to move a first cylinder among the one or more cylinders;
Based on the user input, moving the first cylinder along a reference curve of the base; and
Oral image processing method comprising: generating one or more drain holes by deleting data corresponding to the one or more cylinders from the tooth model data including the base. According to paragraph 1,
The reference curve of the base is,
An oral image processing method comprising at least one of an inner boundary of the base, an outer boundary of the base, and a curve connecting points located in the middle in a thickness direction of the base. According to paragraph 1,
The direction of the central axis of each of the one or more cylinders is parallel to the direction of the normal vector of the point where the central axis and the reference curve intersect. According to paragraph 1,
The step of moving the first cylinder along the reference curve of the base,
generating a virtual ray from a first point on the screen corresponding to the user input in a direction perpendicular to the screen;
determining a second point on the reference curve having the shortest distance from the virtual ray; and
Moving the first cylinder so that the second point is located on the central axis of the first cylinder. According to paragraph 4,
The step of determining the second point is,
Comprising determining the second point on the reference curve having the shortest distance with the virtual ray within a preset distance from a third point on the reference curve where the central axis of the first cylinder intersects before moving. Oral image processing method. According to paragraph 1,
The step of moving the first cylinder along the reference curve of the base,
An oral image processing method comprising moving the first cylinder while maintaining the distance between the central axis of the first cylinder and the reference surface of the base. According to paragraph 1,
The oral image processing method is,
Oral image processing method further comprising: displaying the tooth model data in which the one or more drain holes are created. In clause 7,
The oral image processing method is,
Oral image processing method further comprising: acquiring the tooth model data by generating mesh data extending from an edge of the 3D oral data to the base. According to paragraph 1,
The step of generating one or more cylinders includes,
An oral image processing method comprising receiving user input regarding the number of the one or more cylinders, the diameter of the one or more cylinders, and the distance from the reference surface of the base to the one or more cylinders. According to clause 9,
The step of generating one or more cylinders includes,
An oral image processing method further comprising determining a position of the one or more cylinders based on the number of the one or more cylinders and the distance of the one or more cylinders from a reference surface of the base. According to paragraph 1,
The step of generating one or more cylinders includes,
determining the height of the sides of the one or more cylinders so that they penetrate the wall of the base; and
An oral image processing method comprising generating the one or more cylinders based on the determined side height. The oral image processing device,
display;
user interface;
a memory storing one or more instructions; and
Includes a processor,
The processor executes the one or more instructions stored in the memory,
Obtain 3D oral data by scanning the oral cavity including teeth,
Based on the 3D oral data, a base is generated,
Based on the reference curve of the base, generating the one or more cylinders so that the one or more cylinders penetrate the wall of the base,
Control the display to display the one or more generated cylinders,
Receiving, through the user interface, a user input to move a first cylinder among the one or more cylinders,
Based on the user input, the first cylinder is moved along the reference curve of the base,
An oral image processing device that generates one or more drain holes by deleting data corresponding to the one or more cylinders from the tooth model data including the base. According to clause 12,
The reference curve of the base is,
An oral image processing device comprising at least one of an inner boundary of the base, an outer boundary of the base, and a curve connecting points located in the middle in a thickness direction of the base. According to clause 12,
The direction of the central axis of each of the one or more cylinders is parallel to the direction of the normal vector of the point where the central axis and the reference curve intersect. According to clause 12,
The processor executes the one or more instructions stored in the memory,
Generating a virtual ray from a first point on the screen corresponding to the user input in a direction perpendicular to the screen,
Determine a second point on the reference curve that has the shortest distance from the virtual ray,
Oral image processing device for moving the first cylinder so that the second point is located on the central axis of the first cylinder. According to clause 15,
The processor executes the one or more instructions stored in the memory,
Oral image for determining the second point on the reference curve having the shortest distance with the virtual ray within a preset distance from a third point on the reference curve where the central axis of the first cylinder intersects before moving. processing unit. According to clause 12,
The processor executes the one or more instructions stored in the memory,
An oral image processing device that moves the first cylinder while maintaining the distance between the central axis of the first cylinder and the reference surface of the base. According to clause 12,
The processor executes the one or more instructions stored in the memory,
Oral image processing device for controlling the display to display the tooth model data in which the one or more drain holes are created. According to clause 18,
The processor executes the one or more instructions stored in the memory,
An oral image processing device that acquires the tooth model data by generating mesh data extending from an edge of the three-dimensional oral data to the base. According to clause 12,
The processor executes the one or more instructions stored in the memory,
An oral image processing device that receives, through the user interface, user input regarding the number of the one or more cylinders, the diameter of the one or more cylinders, and the distance from the reference surface of the base to the one or more cylinders. According to clause 20,
The processor executes the one or more instructions stored in the memory,
An oral image processing device that determines the position of the one or more cylinders based on the number of the one or more cylinders and the distance from the reference surface of the base to the one or more cylinders. According to clause 12,
The processor executes the one or more instructions stored in the memory,
Determining the height of the sides of the one or more cylinders so that they penetrate the wall of the base,
An oral image processing device that generates the one or more cylinders based on the determined side height.

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