KR102431223B1 - A device and method for obtaining a dental arch - Google Patents

Abstract

According to an embodiment, a camphor plane is obtained based on a first point applied to the flywheel and a second point applied to the trajectory on the 3D modeling image, and obtained from the camphor plane using projection images of the maxilla and mandible of the object. Disclosed are a device and a method capable of acquiring a dental arch optimized for a patient even for an edentulous patient by acquiring a dental arch on a target plane.

Description

DEVICE AND METHOD FOR OBTAINING A DENTAL ARCH

The present disclosure relates to a device and method for obtaining a dental arch. Specifically, the present disclosure relates to a device and method capable of obtaining a dental arch optimized for a patient even in the case of an edentulous patient.

In general, when creating a guide for implant surgery, the guide shape is designed by arranging a virtual crown based on the dental arch and setting the position of the fixture to match. In this process, since the virtual crown is arranged based on the dental arch and it also affects the panoramic image in 2D, the technology to set the dental arch can be seen as the most important factor in accurately designing the guide shape.

However, the prior art has a problem in that the shape of the dental arch changes depending on where and how the section is progressed in the CT data, which causes the position of the virtual crown and the position of the fixture to change. As such, since it is not possible to set a dental arch at an accurate position and there is no standard, a cumbersome procedure occurs in which the user has to manually adjust the position of the virtual crown as a dental arch is created differently for each case, and accordingly guide shape design The disadvantage is that it takes a long time. In addition, in the case of adjusting the manu plate for holding the occlusal plane even when the dental arch is set, there is a problem in that the user has to manually adjust the dental arch as the dental arch is deformed.

Accordingly, there is a need for a technique for improving user convenience while solving the above-mentioned problems and setting a dental arch more accurately.

The present disclosure may provide devices and methods for obtaining a dental arch. Specifically, a device and a method capable of obtaining a dental arch optimized for a patient even in the case of an edentulous patient are disclosed. The technical problems to be solved are not limited to the technical problems as described above, and various technical problems may be further included within the scope obvious to those skilled in the art.

A method of acquiring a dental arch according to a first aspect of the present disclosure includes: acquiring a 3D modeling image by matching CT data and scan data of an object that does not include teeth; obtaining a camphor plane based on a first point and a second point obtained on the 3D modeling image; obtaining a target plane based on a level difference between the present level and the target plane and the camper plane; and obtaining the dental arch on the target plane by using the projection images of the upper and lower jaws of the object.

In addition, the method includes the steps of overlapping and displaying cross-sections of a plurality of virtual teeth on the 3D modeling image; and determining, based on a user input, a plurality of target teeth corresponding to a plurality of fixture placement positions among the cross-sections of the plurality of virtual teeth.

In addition, the method includes: displaying a control point indicating the plurality of fixture placement positions on the dental arch; and updating the fixture placement position based on a user input to the control point.

In addition, the method includes the steps of overlapping the dental arch and the 3D modeling image to display; and determining a size of the dental arch based on a user input applied to a distal end of the dental arch.

In addition, the method includes the steps of overlapping the dental arch and the 3D modeling image to display; and displaying a virtual tooth positioned on the dental arch based on the target plane.

In addition, the step of obtaining the camper plane may include: determining the first point based on a first user input applied to the wing; determining the second point based on a second user input applied to the migration; and acquiring the camper plane including the first point and the second point.

Also, the obtaining of the target plane may include determining the level difference based on a third user input.

Also, the obtaining of the target plane may include determining the level difference based on a type of a fixture determined based on a fourth user input.

In addition, the obtaining of the camphor plane may include: displaying a first side image and a second side image of the 3D modeling image; displaying an expected flyover point and an expected migration point on the first side image and the second side image; determining the first point in an area adjacent to the fly prediction point of the first side image; determining the second point in an area adjacent to the expected migration point of the first side image; determining a first expected point and a second expected point on the second side image based on the first point and the second point; and obtaining the camper plane based on the first point, the second point, the first predicted point, and the second predicted point.

In addition, the step of determining the first point determines the first point according to the drag input to the fly prediction point, and the step of determining the second point determines the second point according to the drag input for the migration expected point. You can decide 2 points.

A device for acquiring a dental arch according to a second aspect of the present disclosure includes: a processor for acquiring a 3D modeling image by matching CT data and scan data of an object not including teeth; and a receiver configured to acquire a first point and a second point on the 3D modeling image, wherein the processor acquires a camper plane based on the first point and the second point, and a level difference between the present level and the target plane and acquiring a target plane based on the camper plane, and acquiring the dental arch on the target plane using projection images of the upper and lower jaws of the object.

In addition, the device may further include a display configured to overlap and display cross-sections of a plurality of virtual teeth on the 3D modeling image, wherein the processor includes a plurality of fixtures corresponding to a plurality of fixture placement positions among the cross-sections of the plurality of virtual teeth. A target tooth may be determined based on a user input.

In addition, the display may display a control point indicating the plurality of fixture placement positions on the dental arch, and the processor may update the fixture placement positions based on a user input for the control point.

In addition, the device may further include a display configured to overlap the dental arch and the 3D modeling image, and the processor may determine the size of the dental arch based on a user input applied to a distal end of the dental arch. .

In addition, the device may further include a display configured to display the dental arch and the 3D modeling image in an overlapping manner, and display a cross-section of a virtual tooth positioned on the dental arch based on the target plane.

Further, the processor determines the first point based on a first user input applied to the wing, determines the second point based on a second user input applied to the wing, and determines the first point and the second point based on a second user input applied to the wing. It is possible to obtain the camper plane including two points.

A third aspect of the present disclosure may provide a computer-readable recording medium recording a program for executing the method according to the first aspect on a computer. Alternatively, the fourth aspect of the present disclosure may provide a computer program stored in a recording medium to implement the method according to the first aspect.

According to an embodiment, even in the case of an edentulous patient, it is possible to obtain a dental arch optimized for the patient.

In addition, it is possible to reduce time consumption and improve accuracy by quickly and accurately providing a crown shape suitable for an edentulous patient.

In addition, since the shape of the crown can be designed in a user-friendly environment, even a beginner can be supported to produce it precisely like an expert.

The effects of the present disclosure are not limited to the above effects, but it should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present disclosure.

1 is a schematic diagram illustrating an example of a configuration of a device according to an embodiment.
2 is a flowchart illustrating a method for a device to acquire a dental arch according to an embodiment.
FIG. 3 is a diagram for describing an operation in which a device matches CT data and scan data of an object according to an exemplary embodiment.
4 to 7 are diagrams for explaining an operation in which a device acquires a camper plane according to an exemplary embodiment.
8 is a view for explaining a bone level, a target plane, and a level difference between the bone level and the target plane according to an embodiment.
9 to 12 are diagrams for explaining an operation in which a device acquires projection images of the upper and lower jaws of an object, according to an exemplary embodiment.
13 is a diagram for describing an operation in which a device acquires a dental arch using a projection image, according to an exemplary embodiment.
14 is a diagram for describing an operation in which a device determines a fixture type based on a user input, according to an exemplary embodiment.
15 to 16 are views for explaining an operation of setting the axis of the target plane to this level according to the type of the fixture corresponding to the non-submerged type and the submerged type, respectively.
17 to 18 are diagrams for explaining an operation in which the device determines the size of the dental arch 1210 based on a user input, according to an exemplary embodiment.
19 to 20 are diagrams for explaining an operation of overlapping and displaying cross-sections of a plurality of virtual teeth on a 3D modeling image according to which the device according to the first embodiment provides a control point so that the user can modify the fixture placement position. It is a drawing.
21 is a view for explaining an operation of determining a plurality of target teeth based on a user input, and displaying, by overlapping cross-sections of the plurality of target teeth on a 3D modeling image according to the device according to the second embodiment.
22 is a flowchart illustrating an example of a method for a device to acquire a dental arch according to an embodiment.

Terms used in the embodiments are selected as currently widely used general terms as possible while considering functions in the present disclosure, but may vary depending on intentions or precedents of those of ordinary skill in the art, emergence of new technologies, and the like. In addition, in a specific case, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding invention. Therefore, the terms used in the present disclosure should be defined based on the meaning of the term and the contents of the present disclosure, rather than the simple name of the term.

In the entire specification, when a part “includes” a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, the “… wealth", "… The term “module” means a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

Hereinafter, with reference to the accompanying drawings, embodiments of the present disclosure will be described in detail so that those of ordinary skill in the art to which the present disclosure pertains can easily implement them. However, the present disclosure may be implemented in several different forms and is not limited to the embodiments described herein.

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

1 is a schematic diagram illustrating an example of a configuration of a device 100 according to an embodiment, and FIG. 2 is a flowchart illustrating a method of obtaining a dental arch by the device 100 according to an embodiment.

1 to 2 , the device 100 may include a processor 110 , a receiver 120 , and a display 130 .

In operation S210, the processor 110 may acquire a 3D modeling image by matching the CT data and the scan data of the object not including teeth. For example, the processor 110 may acquire each of CT data and scan data for the oral cavity of a patient without teeth through imaging, scanning, memory, or a communication device, and the CT data and scan data according to a pre-stored registration algorithm. A 3D modeling image may be generated by matching the other one based on one preset among them.

In an embodiment, the CT data may include multidimensional image data taken to analyze the oral cavity of an object (eg, a patient), for example, may be a 3D computed tomography (CT) image, but is limited thereto. However, for example, various types of medical images such as Digital Imaging and Communications in Medicine (DICOM) digital images may be included. As such, the technical scope of the present disclosure is not limited to a specific type of medical image.

In one embodiment, the scan data includes three-dimensional stereoscopic information about the patient's oral cavity, and may be, for example, oral scan data obtained using an oral scanner, and an impression body after taking an impression using an impression material. It may be data scanned by , or data scanned by a model after making a plaster model by pouring plaster on an impression body.

In an embodiment, the 3D modeling image may include 3D modeling data for the oral cavity of an object (eg, a patient) obtained according to the registration of CT data and scan data, and a specific view (eg, Axial View, Cross View, Coronal View, etc.) can be understood as a concept encompassing one or more cross-sectional images that are extracted or processed.

In one embodiment, the processor 110 may match the CT data and the scan data based on the registration markers obtained from each of the CT data and the scan data, for example, as shown in FIG. 3 , such as an edentulous case. If the patient does not have teeth, the CT data and the scan data are analyzed to generate a plurality (eg, three) registration markers at points corresponding to preset positions in the oral cavity, or features on the CT data and the scan data A plurality of (eg, three) registration markers may be generated through a user input for a location, and CT data and scan data having different coordinate information may be matched based on the registration markers.

In step S220 , the receiver 120 may acquire a first point and a second point on the 3D modeling image, and the processor 110 may acquire the camper plane 500 based on the first point and the second point. For example, the display 130 displays a cross-sectional image in a specific view (eg, Cross View) included in the 3D modeling image, and the receiving unit 120 receives a first user input and a second input applied on the displayed cross-sectional image. Receives a plurality of user inputs including 2 user inputs, and the processor 110 determines a plurality of points including a first point and a second point based on the received user input, and connects the plurality of points to generate A camper plane 500 including a cross section can be obtained.

Hereinafter, various embodiments of step S220 will be described in more detail with reference to FIGS. 4 to 7 .

4 to 7 are diagrams for explaining an operation in which the device 100 acquires the camphor plane 500 according to an exemplary embodiment.

Referring to FIG. 4 , the processor 110 may display a 3D modeling image of a side view such that the two orbits 410 or the lower orbital edge 420 overlap each other. Here, the orbit 410 may represent a space in which the eyeball enters the skull, and the lower orbital edge 420 may represent a lower edge of the orbit 410 . For example, the processor 110 displays an image of the Cross View by providing axis information (refer to identification number 430) so that the orbits 410 on both sides are viewed as one, and resets the screen so that the orbits are viewed as one in the Cross View. By doing so, it is possible to set the occlusal plane in a more complete side view. In one embodiment, the processor 110 aligns the orbit 410 or the lower orbital edge 420 with one axis provided according to the Cross View, and the orbit 410 or the lower orbital edge 420 of one side is different on the Cross View. It is possible to obtain a side view that is either included in the lateral orbital 410 or the lower orbital edge 420 or overlaps each other more than a preset level.

Referring to FIG. 5 , the processor 110 determines a first point based on a first user input applied to the wing, determines a second point based on a second user input applied to the wing, and determines the first point And it is possible to obtain a camper plane 500 including the second point. Here, the wing represents the rounded protruding nostrils on both sides of the nose tip, and the migration represents the cartilaginous ear beads protruding from the pinna in front of the external foramen.

For example, as shown in FIG. 5 , the processor 110 adjusts the brightness and contrast ratio of the 3D modeling image to a preset level so that the soft tissue image appears in the 3D modeling image of the first Cross View for the right side ( FIG. 5 ( a) and the 3D modeling image of the second Cross View for the left side (refer to FIG. 5(b)) are displayed, respectively, and a user input (eg, a mouse a 1-1 user input and a second to provide a user interface for receiving a click) -1 Receives a user input, determines the 1-1 point and 2-1 point, and selects the second lower wing point 512 and the second wing stage 522 on the second Cross View, respectively. The camper plane 500 may be set to include the determined points by receiving the user input and the 2-2nd user input, determining the 1-2th point and the 2-2th point, and connecting the determined points.

In an embodiment, the processor 110 may display the first side image and the second side image of the 3D modeling image, and display the expected flyover point and the expected migration point on the first side image and the second side image. For example, as shown in FIG. 5 , the 3D modeling image of the first Cross View for the right side and the 3D modeling image of the second Cross View for the left side are displayed, and the 3D modeling images of the first Cross View and the second Cross View are displayed. The first cross view and the second cross view are determined by analyzing the shape of the soft tissue image shown in It can be displayed overlaid on the Cross View.

In an embodiment, the processor 110 may determine a first point in an area adjacent to the expected flyover point of the first side image, and determine a second point in an area adjacent to the expected migration point of the first side image. For example, the processor 110 may determine the first point and the second point using only a user input applied to an adjacent area within a preset distance from the expected flyover point and the expected migration point on the displayed image, and determine the adjacent area. If it is touched in a different location out of the way, it may not be recognized as an input.

In one embodiment, the processor 110 may display the area adjacent to the predicted point of the fly and the area adjacent to the expected point of migration in a preset form, for example, regions in which input is accepted for the fly and migration are displayed in a circle, etc. Alternatively, only the boundary line may be emphasized, and the area adjacent to the point of flight prediction and the area adjacent to the point of migration may be displayed in different colors or shapes.

In an embodiment, the processor 110 determines a first expected point and a second expected point on the second side image based on the first point and the second point, and the first point, the second point, and the first expected point And it is possible to obtain the camper plane 500 based on the second predicted point. For example, the processor 110 determines, according to user input, only two points for the left side wing and trajectory out of a total of four points used to generate the camper plane 500, and only the two determined points. It is also possible to obtain the camper plane 500 directly by anticipating two points for the fly and traverse of the remaining right side. For example, by detecting two points that are each symmetric to the two points determined on the left side, it can be determined as two expected points for the wing and migration of the right side, and the Cross View is Since it is provided, it is possible to immediately determine two points of the other side that are symmetrical thereto according to the two points input from one side.

In an embodiment, the processor 110 may determine a first point according to a drag input to the predicted point of flying and determine a second point according to a drag input to the expected point to move. For example, the processor 110 determines the first position as the first point when a user input of clicking and dragging a first position within the fly-off prediction point to drop it at a second position within the migration prediction point is received, and , the second location may be determined as the second point. In this case, a straight line connecting the first position and the current position of the mouse cursor may be displayed before the drop is made within the expected migration point.

Accordingly, the user can easily set the camper plane 500 by double-clicking on the wing and trajectory on the image through the user interface.

In an embodiment, when the degree of symmetry between the first point and the first predicted point on the side image or the degree of symmetry between the second point and the second predicted point on the side image is less than a preset value, the processor 110 determines whether the first predicted point or A message requesting a user input for the second predicted point may be output.

In another embodiment, the processor 110 determines the degree to which the 1-1 and 1-2 points obtained from the first side image and the second side image with respect to the wing are symmetrical to each other or the user input according to the user input. Accordingly, when the degree of mutual symmetry of the 2-1 point and the 2-2 point obtained with respect to the migration from the first side image and the second side image is less than the preset value, the 1-1 point on the first side image and determining the first expected point and the second expected point on the second side image by using the 2-1 point, and the first expected point and the second expected point instead of the first 1-2 point and the 2-2 point. A message recommending application can be output.

Referring to FIG. 6 , the processor 110 may provide a 3D modeling image based on the two lower orbital margins 420 , for example, the first orbit on the left in a preset specific view (eg, Coronal View). The 3D modeling image of Coronal View may be displayed by providing axis information so that a straight line connecting the lower edge 421 and the second lower orbital lower edge 422 on the right is parallel to the ground and resetting the screen.

Referring to FIG. 7 , the processor 110 may update the camphor plane 500 to be parallel to the line connecting the two lower orbital edges 420 , and for example, the screen by providing axis information in Coronal and Cross View. By resetting the line connecting the lower orbital edge 420 on both sides and the camper plane (refer to identification number 710) can be aligned in parallel

As such, the reason for setting the camper plane 500 in the process of acquiring the dental arch is that when arranging the virtual crown to design the fixture, the fixture must be designed perpendicular to the camper plane 500 of the virtual crown vertically, such as masticatory pressure. Because it can withstand the applied force. In the above, the orbit 410 or the lower orbital edge 420 has been mainly described in the embodiment in which the camphor plane 500 is set, but the present invention is not limited thereto. Thus, the camper plane 500 can be set, and here, the Frankfurt horizontal plane refers to a horizontal plane determined by connecting the lowest point of the orbital margin and the highest point of the orbital margin from the side.

In operation S230 , the processor 110 may acquire the target plane 820 based on the level difference 830 between the present level 810 and the target plane 820 and the camphor plane 500 . This will be further described with reference to FIG. 8 .

8 is a view for explaining a bone level 810 , a target plane 820 , and a level difference 830 between the bone level 810 and the target plane 820 according to an embodiment.

Referring to FIG. 8 , the implant structure to be placed in the oral cavity of a patient through implant surgery includes a fixture 850 that is an implant body corresponding to the root of a tooth, and an abutment 860 that connects the body and the artificial tooth. And it may include a crown (crown) 870 that is an artificial tooth exposed on the surface. In FIG. 8 , this level 810 represents the uppermost portion of the bone within the gum, and the gum level 840 represents the uppermost portion of the gum.

In one embodiment, the processor 110 determines the level difference 830 (hereinafter, referred to as 'level difference') between the level 810 and the target plane 820 based on the pre-stored surgical plan. For effective implant surgery, the uppermost portion of the fixture 850 or the lowermost portion of the abutment 860 is the level difference 830 (eg, 1mm) or more based on the bone level 810 of the implant target tooth. The target plane 820 may be set to be located in the camper plane 500 and parallel to the plane.

In an embodiment, the processor 110 may determine the level difference 830 based on the third user input, for example, the third user input including input information of a specific setting value (eg, 1 mm) is As received, the target plane 820 may be determined by applying a specific setting value (eg, 1 mm) input with respect to the bone level 810 determined through image analysis on the 3D modeling image.

In another embodiment, the processor 110 may determine the level difference 830 based on the type of the fixture 850 determined based on the fourth user input, for example, a specific type (eg, material information ( As the fourth user input including input information of (eg, titanium), model identification number, etc.) is received, a set value (eg, 1 mm) corresponding to a specific type inputted from the memory is read and the target plane 820 is set. can decide

Accordingly, when the user selects the number of the tooth to be implanted and the type of the fixture 850 is selected by the user, the processor 110 matches the level 810 according to the type of the selected fixture 850 (eg, a set value). 0mm) It is possible to accurately determine through an automated process whether to plant the fixture 850 or not to plant the fixture 850 below the set value (eg, 1 mm) lower than this level 810 .

In an embodiment, the processor 110 may display the level difference 830 as a numerical value or a color. For example, the processor 110 displays the level 810, the target plane 820, and the level difference 830 seen on the 3D modeling image in different colors to be visually distinguished from each other, and based on the implant target tooth area. A numerical value according to the level difference 830 may be calculated and displayed together.

Accordingly, the processor 110 may display a variety of information including the determined level difference 830 (eg, 1 mm below the present level 810 or the present level 810, etc.) to support the user to intuitively check it. .

In operation S240 , the processor 110 may acquire the dental arch 1210 on the target plane 820 by using the projection images of the upper and lower jaws of the object. For example, the processor 110 generates a projection image of the maximum intensity for each of the maxilla and the mandible from the 3D modeling image of the axial view by applying the brightness of the preset intensity (eg, maximum intensity), and The dental arch 1210 may be set at the exact center based on preset width information (eg, 1/2 of the bone width) in the projection image.

Hereinafter, various embodiments of step S240 will be described in more detail with reference to FIGS. 9 to 13 .

9 to 12 are diagrams for explaining an operation in which the device 100 acquires projection images of the upper and lower jaws of an object according to an embodiment, and FIG. 13 is a projection image of the device 100 according to an embodiment It is a diagram for explaining an operation of acquiring the dental arch 1210 using

Referring to FIG. 9 , the processor 110 may obtain an maxillary image and a mandible image from the 3D modeling image, respectively, based on the target plane 820 . For example, in the 3D modeling image, each of the upper and lower jaws is segmented based on the target plane 820 to provide an Axial View of a preset range (eg, from each bone level to the lowest bone level, see identification number 910). By extracting the cross-sectional images, a plurality of maxillary images (refer to FIG. 9(a)) and a plurality of mandibular images (see FIG. 9(b)) may be generated, respectively.

Referring to FIG. 10 , the processor 110 may extract an image area equal to or greater than a preset reference brightness (eg, a brightness value of 255) from each of the upper and lower images and may overlap the extracted image area to generate a projected image. . For example, a two-dimensionally combined superimposed image is generated by extracting and accumulating hard tissue with a brightness value of 255 from each sliced section included in the maxillary image and the mandibular image (S1010), and applying a brightness greater than or equal to a preset intensity Thus, three-dimensional data can be expressed in two dimensions by generating a maximum intensity projection image expressing an overlapping image ( S1020 ). The projected image thus generated may be expressed as a two-dimensionally combined cross section from the bone level of each of the upper and lower jaws to the lowermost bone level with respect to the target plane 820 .

Referring to FIG. 11 , the processor 110 may update the projection image based on the region having the largest size in the projection image, for example, the largest size among hard tissues in the maximum intensity projection image generated according to S1020. The projection hard tissue region 1110, which is a large region, may be extracted and used in the subsequent dental arch creation process.

Referring to FIG. 12 , the processor 110 may generate a dental arch 1210 on the projection image of the maxilla and the mandible, for example, the dental arch of the maxilla and the mandible at a preset point in the projection hard tissue region 1110 . An arch 1210 may be set. In an embodiment, the preset point may be a point located in the center of the projected hard tissue region 1110 based on 1/2 of the bone width, but is not limited thereto, and is moved outward or inward from the center at a certain rate. It could be a branch.

Referring to FIG. 13 , the processor 110 may display the dental arch 1210 on the target plane 820 . When the dental arch 1210 is set according to the above-described embodiment, as shown in FIG. 13( a ), the dental arch 1210 may be located on the previously set target plane 820 (refer to identification number 1310 ). , the processor 110 may display the target plane 820 and the dental arch 1210 superimposed on the 3D modeling image. 13( b ) is an exemplary view conceptually illustrating the target plane 820 as viewed from above.

After step S240 or before step S230 , the processor 110 according to an exemplary embodiment performs at least one of the bone level 810 and the level difference 830 between the bone level 810 and the target plane 820 based on the type of the fixture. You can decide one. This will be described with further reference to FIGS. 14 to 16 .

14 is a diagram for explaining an operation in which the device 100 determines a fixture type based on a user input according to an embodiment, and FIGS. 15 to 16 are non-submerged type and submerged type, respectively, according to the types of fixtures corresponding to the submerged type These are diagrams for explaining an operation of setting the axis of the target plane 820 to the present level 810 .

Referring to FIG. 14 , the processor 110 may determine the present level 810 based on a user input for the fixture type, for example, directly receiving a user setting value for the fixture type or by the user from a library. A type of the fixture 850 may be determined according to a selection input, and a position for setting the dental arch 1210 may be different according to the determined type of the fixture. 14(a) shows an example of a submerged fixture type selection library, and FIG. 14(b) shows an example of a non-submerged fixture type selection library.

In an embodiment, the processor 110 may detect a bone margin by using a preset HU value in the CT data, and the bone margin may be determined according to the range of the HU value corresponding to the preset device type. have.

Referring to FIG. 15 , when the fixture type is non-submerged, the processor 110 may set the axis of the target plane 820 to match this level 810, for example, through the previous steps. The acquired camphor plane 500 may be set to fit the highest part in the bone margin detected in the cross view of the CT data.

Referring to FIG. 16 , when the type of the fixture is submerged, the processor 110 may set the axis of the target plane 820 to fit below the level difference 830 from the level 810 seen, yes For example, the camphor plane 500 obtained through the previous steps can be set to fit downward by the level difference 830 (eg, 1 mm) based on the highest part in the bone margin detected in the cross view of the CT data. .

After step S240 , the processor 110 according to an exemplary embodiment displays the dental arch 1210 and the 3D modeling image by overlapping, and based on a user input applied to the distal end of the dental arch 1210 , size can be determined. Here, the 3D modeling image may include one or more cross-sectional images extracted from the 3D modeling image, as described above. This will be described with further reference to FIGS. 17 to 18 .

17 to 18 are diagrams for explaining an operation in which the device 100 determines the size of the dental arch 1210 based on a user input, according to an exemplary embodiment.

Referring to FIG. 17 , the processor 110 slices the 3D modeling image on the target plane 820 determined through the above steps to display the image of the axial view, and the dental arch 1210 on the image of the axial view. They can be displayed overlapping. For example, when the Axial View provides an image of the Cross View obtained through the above-described steps, FIG. 15(b) may be displayed as shown in FIG. 15(a), and FIG. 16(b) is shown in FIG. 16( It can be displayed as a).

Referring to FIG. 18 , the processor 110 provides a user interface that can adjust the set dental arch 1210 to the boundary of the rearmost tooth (eg, distal to the second molar), and responds to a user input applied through the user interface. Accordingly, the size of the dental arch 1210 may be updated. For example, the updated first end 1810 and the updated second end 1820 according to a drag and drop input applied to the first end 1710 and the second end 1720 of the dental arch 1210, respectively. ) can be obtained.

In an embodiment, the processor 110 may update the length and line characteristics of the dental arch 1210 according to a user input applied to the distal end of the dental arch 1210 , for example, a drop point after dragging. If it is located inside the dental arch 1210 before the change, the length, size, and slope of the curve may be updated so that the distal end curve of the dental arch 1210 is moved inward.

In another embodiment, the processor 110 may update the line length of the dental arch 1210 according to a user input applied to the distal end of the dental arch 1210 , for example, the distal end of the dental arch 1210 . A curve from a point to a point dropped after dragging may be cut out from the dental arch 1210 to reduce only the length.

In the first embodiment, the processor 110 displays a control point 1910 indicating a plurality of fixture placement positions on the dental arch 1210 , and determines the fixture placement location based on a user input to the control point 1910 . Can be updated. This will be described with further reference to FIGS. 19 to 20 .

19 to 20 show an operation of overlapping and displaying a plurality of virtual teeth on a 3D modeling image according to which the device 100 according to the first embodiment provides a control point 1910 so that a user can correct a fixture placement position. It is a drawing for explaining.

Referring to FIG. 19 , the processor 110 provides a user interface including a control point 1910 through which a user can modify a fixture placement position, and according to a user input to the control point 1910 , the dental arch 1210 . It is possible to update the shape and the placement position of the fixture on the dental arch 1210 . For example, the entire position of the dental arch 1210 is moved in response to a user input applied to the dental arch 1210 , and a fixture corresponding to the control point 1910 is placed according to the user input applied to the control point 1910 . The shape of the dental arch 1210 may be updated so that the coordinates of the position are corrected and a curve is formed according to the modified control point 1910 .

In the first embodiment, the control point 1910 is provided to evenly divide the size of the dental arch 1210 into a predetermined number (eg, n (natural number)) to form a constant interval between the control points 1910. can

Referring to FIG. 20 , the processor 110 superimposes the dental arch 1210 and the 3D modeling image and displays a cross-section of the virtual tooth positioned on the dental arch 1210 based on the target plane 820 . can That is, when the user sets the fixture placement position through the control point 1910 , the axial modeling data of the preset virtual tooth is superimposed on the fixture placement position set on the dental arch 1210 based on the target plane 820 . You can create and display a cross section of a tooth in View. At this time, the tooth cross section may be symmetrically increased or decreased based on the average value of the preset tooth size.

In the second embodiment, the processor 110 determines the control point 1910 according to a predetermined fixture placement position, and displays a cross section of the virtual tooth located on the dental arch 1210 based on the target plane 820 . It can be done. Details on this will be described with further reference to FIG. 21 .

FIG. 21 is a diagram for explaining an operation of determining a plurality of target teeth based on a user input by the device 100 according to the second embodiment and displaying the cross-sections of the plurality of target teeth by overlapping them on a 3D modeling image. .

Referring to FIG. 21 , the processor 110 overlaps and displays cross-sections of a plurality of virtual teeth on a 3D modeling image, and based on a user input, a plurality of target teeth corresponding to a plurality of fixture placement positions among the plurality of virtual teeth. can decide For example, as shown in FIG. 21( a ), an image (eg, a dental diagram) for a pre-stored virtual tooth is displayed, or as shown in FIG. 21( b ), based on the target plane 820 . An image of a cross-section of a plurality of virtual teeth is superimposed and displayed on the 3D modeling image of Axial View, and a plurality of virtual teeth are displayed according to a tooth number corresponding to one or more virtual teeth selected by a user among the displayed cross-sections of the plurality of virtual teeth. A target tooth may be determined.

In the second embodiment, the processor 110 determines the control point 1910 according to the cross-sections of the plurality of target teeth, and displays the control point 1910 indicating the placement position of the plurality of fixtures on the dental arch 1210 and , the fixture placement position may be updated based on a user input to the control point 1910 . For example, the control point 1910 may be generated at the central axis position of the region in which the fixture 850 is to be placed based on the size of individual crown teeth in the library according to the tooth number selected by the user.

In the second embodiment, the processor 110 may display the plurality of target teeth based on the bone level 810 and the level difference 830 for the plurality of target teeth, for example, according to a user input. If the fixture 850 is set or selected to be implanted 1 mm below the level 810 , a cross-section of the tooth may be generated and displayed according to the axial view of the 1 mm below level of the present level 810 . At this time, the tooth cross section may be symmetrically increased or decreased based on the average value of the preset tooth size.

At least some of the operations described with reference to FIG. 21 may be performed at least before step S240. For example, the process of determining a plurality of target teeth according to a user input may be performed at the beginning of the process or before step S220. can

In an embodiment, the processor 110 may correct a dental arch using a virtual tooth axis using a cross-sectional view of the virtual tooth. For example, a plurality of target teeth including the target tooth may be analyzed by analyzing the cross-sectional view of the virtual tooth. The dental arch may be updated by acquiring apical axis information on the virtual tooth, determining an abnormal tooth axis in which an angle between the tooth axis and the vertical direction of the occlusal plane among the plurality of virtual teeth is equal to or greater than a preset angle, and correcting the abnormal tooth axis.

The processor 110 according to an embodiment may perform a series of operations for acquiring the dental arch 1210 and may be implemented as a central processor unit (CPU) that controls the overall operation of the device 100 , It may be electrically connected to the receiver 120 , the display 130 , and other components to control the flow of data therebetween.

In an embodiment, the display 130 may refer generically to an image data processing device that displays an image, for example, a liquid crystal display, a thin film transistor-liquid crystal display, or a thin film transistor-liquid crystal display. ), an organic light-emitting diode, a flexible display, a three-dimensional display (3D display), an electrophoretic display, and the like.

In an embodiment, the display 130 may display various pieces of information described throughout the specification under the control of the processor 110 .

In addition, it can be understood by those of ordinary skill in the art that other general-purpose components other than those shown in FIG. 1 may be further included in the device 100 . According to an embodiment, the device 100 includes an algorithm for processing three-dimensional image data, a communication module for communicating with other devices through a wired/wireless network, a user interface receiving module for receiving user input, and a storage module for storing data and the like may be further included, and according to another embodiment, some of the components shown in FIG. 1 may be omitted.

22 is a flowchart illustrating an example of a method for the device 100 to acquire the dental arch 1210 according to an embodiment.

Referring to FIG. 22 , the device 100 may acquire a 3D modeling image by matching the CT data and the scan data (step S2210), and set the camper plane 500 based on the user input (step S2220), Create a maximum intensity projection image based on the camper plane 500 (step S2230), and set the dental arch 1210 in the center based on 1/2 of the bone width in the maximum intensity projection image (S2240) have.

In addition, the device 100 sets the bone level 810 according to the type of fixture selected or set by the user (step S2250), and slices the 3D modeling image based on the set bone level 810 to provide an Axial View image. and (step S2260), receives a user's correction input for the dental arch 1210 through the control point 1910 (step S2270), and after the size of the dental arch 1210 is determined, the virtual level 810 according to the setting It is possible to display a cross-sectional view of the tooth (S2280).

In one embodiment of the present invention, it is possible to set a dental arch optimized for an edentulous patient in the process of designing a guide for dental implant surgery, and time is consumed by setting the dental arch through the camper plane 500 based on the wing and trabeculae. In terms of efficiency, it is possible to reduce cumbersome procedures for the user, and it is possible to improve user convenience by facilitating the user's modification through the control point.

The order and combination of the steps shown above is an embodiment, and the order, combination, branch, function and the performing subject are various in addition, omission, or modified form within a range that does not deviate from the essential characteristics of each component described in the specification. It can be seen that it can be implemented.

In addition, although the camper plane 500 and the shape of the virtual tooth are shown in two dimensions throughout the drawings, embodiments expressed in three dimensions based on 3D modeling data may be included, and accordingly, in individual positions Determination and correction of values for various items such as the angle of the camper plane 500 and the inclination of the dental arch may be made. In addition, throughout the specification, the expression “providing” information may include displaying or transmitting and receiving corresponding information. Also, some of the above-described operations may be implemented in variously modified forms in terms of order, function, and branching.

Meanwhile, the above-described method can be written as a program that can be executed on a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium. In addition, the structure of the data used in the above-described method may be recorded in a computer-readable recording medium through various means. The computer-readable recording medium includes a storage medium such as a magnetic storage medium (eg, ROM, RAM, USB, floppy disk, hard disk, etc.) and an optically readable medium (eg, CD-ROM, DVD, etc.). do.

A person of ordinary skill in the art related to this embodiment will understand that it can be implemented in a modified form within a range that does not deviate from the essential characteristics of the above description. Therefore, the disclosed methods are to be considered in an illustrative rather than a restrictive sense. The scope of the present disclosure is indicated by the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present disclosure.

100: device
110: processor
120: receiver
130: display

Claims (17)

In the method of obtaining a dental arch,
Acquiring a 3D modeling image by matching the CT data and the scan data of the object that does not include teeth;
obtaining a camphor plane based on a first point and a second point obtained on the 3D modeling image;
obtaining a target plane based on a level difference between the present level and the target plane and the camper plane; and
Acquiring the dental arch on the target plane by using the projection images of the maxilla and the mandible of the object.
The method of claim 1,
overlapping and displaying cross-sections of a plurality of virtual teeth on the 3D modeling image; and
Determining a plurality of target teeth corresponding to a plurality of fixture placement positions among the cross-sections of the plurality of virtual teeth based on a user input; further comprising a method.
3. The method of claim 2,
displaying a control point indicating placement positions of the plurality of fixtures on the dental arch; and
Updating the fixture placement position based on a user input for the control point; further comprising a method.
The method of claim 1,
overlapping the dental arch and the 3D modeling image to display; and
The method further comprising; determining the size of the dental arch based on a user input applied to the distal end of the dental arch.
The method of claim 1,
overlapping the dental arch and the 3D modeling image to display; and
Displaying a cross section of the virtual tooth positioned on the dental arch based on the target plane; further comprising, the method.
The method of claim 1,
The step of obtaining the camper plane is
determining the first point based on a first user input applied to the fly;
determining the second point based on a second user input applied to the migration; and
obtaining the camper plane including the first point and the second point.
The method of claim 1,
The step of obtaining the target plane is
determining the level difference based on a third user input.
The method of claim 1,
The step of obtaining the target plane is
determining the level difference based on a type of a fixture determined based on a fourth user input.
The method of claim 1,
The step of obtaining the camper plane is
displaying a first side image and a second side image of the 3D modeling image;
displaying an expected flyover point and an expected migration point on the first side image and the second side image;
determining the first point in an area adjacent to the fly prediction point of the first side image;
determining the second point in an area adjacent to the expected migration point of the first side image;
determining a first expected point and a second expected point on the second side image based on the first point and the second point; and
obtaining the camper plane based on the first point, the second point, the first predicted point, and the second predicted point.
10. The method of claim 9,
The step of determining the first point determines the first point according to the drag input to the fly prediction point,
In the determining of the second point, the second point is determined according to a drag input to the expected migration point.
A device for obtaining a dental arch, comprising:
a processor for acquiring a 3D modeling image by matching CT data and scan data of an object that does not include teeth; and
Including a; receiving unit for acquiring the first point and the second point on the 3D modeling image,
the processor
A camphor plane is obtained based on the first point and the second point, a target plane is obtained based on the level difference between the bone level and the target plane, and the camper plane, and the upper and lower jaw projection images of the object are used. obtaining the dental arch on the target plane.
12. The method of claim 11,
A display for displaying the cross-sections of a plurality of virtual teeth by superimposing them on the 3D modeling image; further comprising,
the processor
A device for determining, based on a user input, a plurality of target teeth corresponding to a plurality of fixture placement positions among the cross-sections of the plurality of virtual teeth.
13. The method of claim 12,
the display is
Displaying a control point indicating the placement of the plurality of fixtures on the dental arch,
the processor
The device for updating the fixture placement position based on a user input to the control point.
12. The method of claim 11,
A display for displaying the dental arch and the 3D modeling image by overlapping; further comprising,
the processor
A device for determining a size of the dental arch based on a user input applied to a distal end of the dental arch.
12. The method of claim 11,
A display for displaying the dental arch and the 3D modeling image by overlapping; further comprising,
A device for displaying a virtual tooth located on the dental arch based on the target plane.
12. The method of claim 11,
the processor
determining the first point based on a first user input applied to the fly;
determine the second point based on a second user input applied to the migration;
obtaining the camper plane including the first point and the second point.
A computer-readable recording medium in which a program for executing the method of any one of claims 1 to 10 in a computer is recorded.

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