KR102487344B1 - Virtual occlusion system using static and dynamic occlusion data and method of operating the same - Google Patents

Abstract

A tooth alignment system using static and dynamic occlusion data and an operating method thereof are provided. The operating method of the virtual occlusion system includes the steps of matching CT data obtained from a patient with primary impression data and forming a tray using the registered primary impression data, using the tray to obtain static occlusion data and dynamic occlusion data. Generating an arrangement data of virtual upper and lower teeth using the static occlusion data, and generating an alignment data between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data. and automatically or manually adjusting the abutment point.

Description

Virtual occlusion system using static and dynamic occlusion data and its operating method

The present invention relates to a virtual occlusion system using static and dynamic occlusion data and an operation method thereof, and more particularly, to an artificial tooth using impression data of an edentulous patient and static and dynamic occlusion data obtained from movement of a customized tray. It relates to a virtual occlusion system configured to automatically achieve bilateral balanced occlusion and a method of operating the same.

In the process of manufacturing dental dentures for edentulous patients, confirmation of virtual occlusion using software is required. This is because it is possible to obtain the effect of convenience of the operator and reduction of treatment time when setting the denture in the oral cavity through the occlusion adjustment of the denture to be restored.

However, confirmation of the current virtual occlusion is performed by inputting arbitrary data for the semi-adjustable articulator previously registered as a library and applying the adjusted result to the patient's data. Since this is not a method using measured information from the patient, there is a problem that may cause a low or high denture due to an error in occlusion adjustment, and even dropout of the denture in severe cases.

Korean Patent Laid-open Publication No. 10-2013-0048202 (published on May 9, 2013)

The technical problem to be solved by the present invention is to obtain impression data using a tray custom-made for an edentulous patient, and use the impression data and static and dynamic occlusion data obtained from the movement of the tray to create a bilateral balanced occlusion of virtual teeth. To provide a virtual occlusion system that simulates to achieve and a method of operating the same.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

In order to solve the above technical problem, a method of operating a virtual occlusion system according to some embodiments of the present invention matches CT data obtained from a patient with primary impression data, and forms a tray using the matched primary impression data. generating static occlusion data and dynamic occlusion data using the tray, generating virtual maxillary and mandibular tooth arrangement data using the static occlusion data, and generating the static occlusion data and the dynamic occlusion data. and automatically or manually adjusting an occlusion point between the virtual upper and lower teeth using occlusion data.

In some embodiments of the present invention, the generating of the static occlusion data using the tray includes obtaining secondary impression data of the upper and lower jaws, and the secondary impression data of the upper and lower jaws and center occlusion data. It may include generating static occlusion data by matching.

In addition, in some embodiments of the present invention, the generating of the dynamic occlusion data using the tray may include generating dynamic occlusion data from movement of at least one of the front, right side, and left side of the oral cavity of the tray. can include

The method may further include limiting a movement path of the lower jaw according to contact between the virtual upper jaw teeth and the lower jaw teeth after the generating of the dynamic occlusion data.

In some embodiments of the present invention, the limiting of the movement path is the rightward or leftward movement in contact with the lingual cusp of the upper jaw (the most protruding part) and the buccal cusp of the lower jaw, or the buccal cusp of the upper jaw and the buccal cusp of the lower jaw. In the case of forward motion, it may be based on the contact between the cutting surface of the upper anterior teeth and the cutting surface of the lower anterior teeth from the virtual tooth arrangement.

In some embodiments of the present invention, the step of automatically or manually adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data may include: The method may include displaying the occlusal strength and determining that an occlusal strength needs to be adjusted in an area where the occlusal strength exceeds a predetermined range.

In some embodiments of the present invention, the step of automatically or manually adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data may include: When early contact occurs, it may include removing the early contact area based on the central sphere (the deepest part) and the cusp (the most protruding part) of the tooth.

In addition, the step of automatically or manually adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data may include rotating a tooth axis with respect to a tooth including a region in which the occlusion point needs to be adjusted, This may include adjusting bite strength.

In some embodiments of the present invention, the step of adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data may include the occurrence of early contact between the virtual upper and lower teeth. A step of displaying a specific tooth or displaying a list of teeth in which early contact has occurred may be further included.

A virtual occlusion system according to some other embodiments of the present invention for solving the above technical problem includes a data acquisition unit that acquires CT data and first impression data from a patient, matching the obtained CT data and first impression data, and , Including a control unit for forming a tray using the matched primary impression data, including an output unit for displaying a dental image processed by the control unit and a user interface for receiving a manipulation signal from a user for the dental image, The control unit receives the secondary impression data of the upper and lower jaws obtained by the data acquisition unit using the tray and intraoral movement of the tray, and matches the secondary impression data of the upper and lower jaws to obtain static occlusion data. is generated, dynamic occlusion data is generated from movement of the tray in the oral cavity, and the occlusion point between the virtual upper and lower teeth is automatically or manually adjusted using the static occlusion data and the dynamic occlusion data.

In some embodiments of the present invention, the control unit may generate dynamic occlusion data from movement of at least one of the front, right, and left sides of the oral cavity of the tray.

In some embodiments of the present invention, the control unit may limit a movement path of the lower jaw according to the contact between the virtual upper jaw teeth and the lower jaw teeth based on a user's input.

In addition, the restriction of the exercise path is based on the contact between the lingual cusp of the upper jaw and the buccal cusp of the lower jaw or the contact between the buccal cusp of the upper jaw and the buccal cusp of the lower jaw in the right or left motion, and in the case of forward movement, the upper jaw from the virtual tooth arrangement. It may be based on contact between the incisal surfaces of the anterior teeth and the incisal surfaces of the mandibular anterior teeth.

In some embodiments of the present invention, the control unit may display control points divided into the exercise path at predetermined intervals through the output unit, and may distinguish and display a path to a restricted exercise path.

In some embodiments of the present invention, the control unit may display the bite strength between the virtual upper and lower teeth through the output unit, and determine that an area in which the bite strength exceeds a predetermined range needs to be adjusted for the bite point. there is.

In some embodiments of the present invention, the control unit may suggest automatic or manual deletion of the early contact portion based on the central sphere and the cusp of the tooth when early contact occurs between the virtual upper and lower teeth.

In some embodiments of the present invention, the user interface may receive a command to rotate the tooth axis of a tooth including a region requiring adjustment of the occlusal point, and the control unit may adjust the occlusal strength based on the rotated tooth axis.

In some embodiments of the present invention, the control unit may delete a region in which the occlusal strength exceeds a predetermined range through manual adjustment or automatically delete and display the region through the output unit.

In some embodiments of the present invention, the control unit may specify and display a tooth in which early contact has occurred among the virtual upper and lower teeth through the output unit, or may display a list of teeth in which early contact has occurred.

The virtual occlusion system and its operating method according to some embodiments of the present invention may manufacture a user-customized tray and automatically or manually adjust the occlusion point of virtual teeth using dynamic and static occlusion data generated using the tray. That is, rather than adjusting the occlusal point by inputting arbitrary data for the semi-adjustable articulator registered in a pre-stored library, static occlusion and dynamic occlusion data are generated to fit the shape of the oral tissue of the patient. Improve the accuracy of denture formation for edentulous patients by providing automatic or manual deletion of virtual teeth or rotation of the tooth axis to determine the case of premature contact between teeth using the generated static occlusion and dynamic occlusion data and resolve it. It can also improve the stability of the formed denture.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a block diagram of a virtual occlusal system according to some embodiments of the present invention.
2 is a flowchart illustrating a method of operating a virtual occlusion system according to some embodiments of the present invention.
3 is a flowchart illustrating in more detail a step of forming a tray from CT data and primary impression data according to some embodiments of the present invention.
FIG. 4 is a diagram showing the patient's oral cavity to which a reference marker is attached and CT data obtained by imaging the oral cavity according to an embodiment of the present invention.
5 is a diagram for explaining a process of obtaining first impression data obtained according to some embodiments of the present invention, and FIG. 6 is a view for matching a face scan and first impression data according to some embodiments of the present invention. It is a diagram for explaining the process of obtaining scan data.
7 to 8 are views for explaining a matching process between CT data of the upper and lower jaws and primary impression data of the upper and lower jaws according to some embodiments of the present invention.
9 and 10 are views for explaining a matching process between face scan data and primary matching data according to some embodiments of the present invention.
11 is a flowchart illustrating a detailed process of designing a tray using first impression data generated according to some embodiments of the present invention.
12 is a diagram illustrating an example of setting the height of impression model data manufactured using primary impression data generated according to some embodiments of the present invention.
13 is a view showing a screen for automatically setting a first reference point of impression model data to automatically manufacture a tray according to an embodiment of the present invention.
14 is a diagram illustrating a screen in which a primary tray line is automatically set based on a first reference point set according to some embodiments of the present invention.
15 is a diagram illustrating a screen for automatically setting a final tray line according to some embodiments of the present invention.
16 is a diagram illustrating a screen for automatically completing a three-dimensional shape of a final tray according to some embodiments of the present invention.
17 is a diagram illustrating markers that enable precise registration with trays produced according to some embodiments of the present invention.
18 is a diagram showing a screen for generating a Camper's plane from obtained CT data according to some embodiments of the present invention.
19 is a view showing a state in which an upper jaw plate is automatically created parallel to a Camper plane created according to some embodiments of the present invention.
20 is a diagram illustrating an example of setting a vertical height using a face measurement method on a screen in which CT data and face scan data generated according to some embodiments of the present invention are matched.
21 is a diagram of an upper tray formed in accordance with some embodiments of the invention, and FIG. 22 is a diagram of a mandibular tray formed in accordance with some embodiments of the invention.
FIG. 23 is a diagram illustrating obtaining secondary impression data of the upper jaw from a patient's secondary upper jaw impression body according to some embodiments of the present invention, and FIG. 24 is a diagram illustrating a second impression of the lower jaw from a patient's secondary lower jaw impression body. It is a diagram showing acquiring data.
25 is a diagram for explaining generating static occlusion data by matching upper and lower secondary impression data and central occlusion data according to some embodiments of the present invention.
26 is a diagram for explaining registration of static occlusion data and CT data or secondary impression data according to some embodiments of the present invention.
27 is a diagram for explaining generating dynamic occlusion data using a movement path formed on an upper plate according to some embodiments of the present invention.
28 is a diagram for explaining motion path limitation settings according to virtual tooth arrangements after obtaining dynamic occlusion data according to some embodiments of the present invention.
29 is a flowchart illustrating a process of automatically or manually adjusting an intersection point using static and dynamic occlusion data according to an embodiment of the present invention.
30 is a diagram for explaining setting an occlusal surface table according to some embodiments of the present invention.
31 is a diagram for explaining display of occlusal strength to a user according to some embodiments of the present invention.
32 to 34 are diagrams for explaining a process of automatically adjusting the occlusion point by detecting and deleting a part where early contact occurs when simulating virtual occlusion.
35 to 36 are diagrams for explaining a process of displaying an occlusion point and determining a deletion area when an early contact occurs due to manual adjustment by a user in a central occlusion state in a virtual occlusion system according to some embodiments of the present invention. .
37 to 38 are diagrams for explaining a process of displaying an occlusion point and determining a deletion area when early contact occurs due to manual adjustment by a user in a dynamic occlusion state in a virtual occlusion system according to some embodiments of the present invention. .
39 is a view for explaining setting bilateral balanced occlusion through tooth axis rotation of virtual teeth according to some embodiments of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, "comprises" and/or "comprising" means that a stated component, step, operation, and/or element is present in the presence of one or more other components, steps, operations, and/or elements. or do not rule out additions.

Although first, second, etc. are used to describe various constituent elements, these constituent elements are not limited by these terms, of course. These terms are only used to distinguish one component from another. Accordingly, it goes without saying that the first component mentioned below may also be the second component within the technical spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

The term 'unit' used in this embodiment means software or a hardware component such as FPGA or ASIC, and 'unit' performs certain roles. However, 'unit' is not limited to software or hardware. A 'unit' may be configured to reside in an addressable storage medium and may be configured to reproduce one or more processors. Thus, by way of example, 'part' may refer to software components, object-oriented software components, functions, subroutines, segments of program code, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. Functions provided within components and 'parts' may be combined into smaller numbers of elements and 'parts' or further separated into additional elements and 'parts'.

1 is a block diagram of a virtual occlusal system according to some embodiments of the present invention.

Referring to FIG. 1 , the virtual occlusion system 1 may include a data acquisition unit 110, a user interface 120, a controller 130, an output unit 140, and a storage unit 150. The virtual occlusion system 1 is a computer system that configures the virtual teeth of an edentulous patient to form a bilateral balanced occlusion using static and dynamic occlusion data, such as a personal computer (PC), server computer, workstation, and laptop computer. It may include various computer systems such as In some embodiments, virtual occlusal system 1 may include a collection of multiple computer systems.

The data acquisition unit 110 may acquire dental image data from an edentulous patient. Dental image data may include, for example, oral scan data, CT data, and face scan data.

The intraoral scan data is data having information of actual teeth including damaged teeth, and may be 3D information. Oral scan data is obtained by scanning a plaster model created by imitating the patient's oral cavity with a 3D scanner, or by scanning an impression body created by imitating the patient's oral cavity with a 3D model scanner. It can be. As another example, it may be obtained by scanning the inside of the oral cavity of the patient using a 3D intra-oral scanner. The obtained oral scan data may be stored in the storage unit 150 .

CT data may be obtained by generating tomographic images of the patient's head using computed tomography (CT), segmenting the upper and lower jaws using each of the tomographic images, and then combining them into one. These oral scan data and CT data include images obtained by imaging the upper edentulous jaw with the patient's mouth open, images obtained by imaging the lower edentulous jaw with the patient's mouth open, images obtained by imaging local areas in the centric position, oral radiographs, etc. can include The obtained CT data may be stored in the storage unit 150 .

The facial scan data may generate geometry information of the facial surface of the edentulous patient in a 3D form using a laser or white light. Such face scan data may include scan data of a patient's static state and scan data of a patient's smile. The acquired face scan data may be stored in the storage unit 150 .

The storage unit 150 may store various types of data, such as information necessary for the operation of the virtual occlusion system 1 and information generated according to the operation. The storage unit 150 includes, for example, volatile memory such as DRAM (Dynamic RAM) and SRAM (Static RAM), flash memory, PRAM (Phasechange RAM), MRAM (Magnetic RAM), RRAM (Resistive RAM), FRAM (Ferroelectric RAM), or a solid state disk (SSD) or hard disk drive (HDD) composed of these, but the present invention is not limited thereto. In addition, the storage unit 150 may be a storage device located in the same space as the virtual occlusion system 1, but the present invention is not limited thereto, and the storage unit 150 is connected to the virtual occlusion system 1 through a network. It may also include a remote storage system, such as cloud storage.

The storage unit 150 may store acquired oral scan data, CT data, and face scan data of the patient, and may provide necessary data upon request of the controller 130 .

The control unit 130 executes software for performing functions necessary for the operation of the virtual occlusion system 1 and uses static occlusion data and dynamic occlusion data to automatically or manually perform functions necessary for occlusal adjustment. functions can be controlled. For example, in simulating virtual occlusion using the static occlusion data and the dynamic occlusion data, the control unit 130 may automatically adjust the occlusion point by detecting and deleting an early contact. In addition, the control unit 130 may manually adjust the intersection point by displaying the area where early contact occurs to the user through the output unit 140 and receiving and deleting the area to be deleted from the user.

The control unit 130 may manage screen information displayed on the screen through the output unit 140 and perform simulation through diagnosis and analysis using dental images through control by software. Dental images refer to multi-dimensional images such as 2-dimensional and 3-dimensional images of a patient generated for establishing a treatment plan. Various types of images such as X-ray, CT, MRI, panoramic images, intraoral scan images, images generated through reconstruction, and images obtained by matching multiple images can be used for the simulation.

The controller 130 according to an exemplary embodiment matches the CT data and the first impression data to generate a patient-customized tray and guide pins for acquiring the patient's occlusion data. Such a patient-customized tray can be easily manufactured, and border molding can be performed without removing the tray with a uniform impression material thickness using the manufactured patient-customized tray.

For example, the controller 130 generates 3D first impression model data from first impression data generated by scanning the patient's oral cavity to which the reference marker is attached by the data acquisition unit 110 . At this time, the first inflection point of the first impression model data is assigned as the first reference point, the first tray line is created at a preset distance from the first reference point, the final tray line is created in consideration of the thickness of the impression material, and the final tray line is created. The three-dimensional shape of the tray is created by assigning a preset thickness in the line. The tray manufacturing of the control unit 130 will be described later in detail with reference to FIGS. 2 to 19 .

In addition, the controller 130 may obtain patient occlusion data using the manufactured tray customized for the patient. The patient's occlusion data may include static occlusion data in which secondary impression data of the upper and lower jaws generated using the tray are matched, and dynamic occlusion data generated from intraoral movement of the tray.

The controller 130 scans the upper and lower jaw secondary impression bodies (negative shapes) and then creates a corresponding both model, or scans a model produced by pouring plaster on the upper and lower jaw secondary impression bodies, thereby scanning the upper and lower jaw. Of the second impression data can be generated. The controller 130 may generate static occlusion data by matching the upper and lower secondary impression data, and may generate dynamic occlusion data from forward, right, and left motions of the lower jaw. Regarding the generation of static and dynamic occlusion data by the control unit 130, it will be described later in more detail using FIGS. 21 to 27.

In addition, the controller 130 may adjust the occlusion point between the virtual upper and lower teeth using static and dynamic occlusion data. The control unit 130 may display an area requiring occlusal adjustment to the user based on the occlusal strength between the virtual upper and lower teeth, automatically delete and display the area to the user, and may display the area to the user, and display the area to the user. An updated occlusal strength may be calculated from an input through deletion of a region provided or rotation of the tooth axis of the corresponding tooth.

The user interface 120 may receive a user manipulation signal. The user interface 120 may receive a user manipulation signal such as a mouse click from a dental image displayed as a virtual graphic object on the screen through the output unit 140 .

The output unit 140 displays a dental image on the screen and displays a simulation process through the control unit 130 on the screen. Furthermore, the tray designed through the control unit 130 may be output through a 3D printer.

2 is a flowchart illustrating a method of operating a virtual occlusion system according to some embodiments of the present invention.

Referring to FIG. 2 , the operating method of the virtual occlusion system according to an embodiment of the present invention includes forming a tray from CT data and primary impression data (S110), and generating secondary impression data using the tray (S110). S120), generating static and dynamic occlusion data (S130), generating virtual upper and lower teeth arrangement data (S140), automatically or manually adjusting the occlusion point between the virtual upper and lower teeth Step S150 may be included.

3 is a flowchart illustrating in more detail a step of forming a tray from CT data and primary impression data according to some embodiments of the present invention.

Referring to FIG. 3 , the operating method of the virtual occlusion system according to an embodiment of the present invention includes obtaining CT data of a patient (S111), acquiring primary impression data (S112), and combining the acquired CT data and 1 Matching the car impression data (S113). A step of designing the tray through primary impression data, which is surface data, among the matching data (S114), and finally outputting the tray through a 3D printer (S115) may be included.

FIG. 4 is a diagram showing the patient's oral cavity to which a reference marker is attached and CT data obtained by imaging the oral cavity according to an embodiment of the present invention.

Referring to FIG. 4 , before obtaining CT data, a reference marker 11 is attached to the patient's oral cavity, eg, the gum 12, as shown in FIG. 4(a). The reference marker 11 may be a radiopaque material, and the attachment position may be a position on the gum 12 toward the anterior and both posterior teeth of the tooth. The reference marker 11 may be provided in a shape having a certain volume, such as a cylinder or a polygonal column. At this time, the reference markers 11 of a preset size are regularly distributed and attached. If the reference markers 11 are attached in a small size or are concentrated on one side, an error may occur when matching. When the gum 12 to which the reference marker 11 is attached is CT-scanned, CT data 13 is obtained as shown in FIG. 4(b).

5 is a diagram for explaining a process of acquiring first impression data obtained according to some embodiments of the present invention, and FIG. 6 is a diagram for matching with first impression data through a face scan according to some embodiments of the present invention. It is a diagram for explaining a process for obtaining face scan data.

Referring to FIGS. 5 and 6 , the virtual occlusion system 1 may obtain first impression data 14 by scanning the oral cavity of a patient with the reference marker 11 attached to the gum 12, for example. . Methods for obtaining the first impression data 14 include a method using an intraoral scanner, a method of acquiring an impression of the patient by injecting impression material into a ready-made tray, and then scanning the impression body as it is, and a method of injecting impression material into a ready-made tray to obtain an impression of the patient. After obtaining an impression, there is a method of manufacturing an impression model and scanning the impression model.

As shown in FIG. 6 , the face surface of the patient may be acquired in the form of 3-dimensional data using a face scanner. Through the face scan process, it is possible to obtain face scan data 15 in a static state as shown in FIG. 6 (a) and face scan data 16 in a patient's smiling face as shown in FIG. 6 (b).

7 to 8 are diagrams for explaining a matching process between CT data and first impression data according to some embodiments of the present invention.

Referring to FIGS. 7 and 8 , the virtual occlusion system 1 aligns the reference markers in the CT data 13 and the first impression data 14 so that they are at the same position, and then uses the reference markers aligned at the same position. Matching is performed between the CT data 13 and the first impression data 14. The reference markers may be, for example, three points as shown in FIGS. 7 and 8 and may be designated by the user.

Data matching between the CT data 13 and the first impression data 14 For example, as shown in FIG. ) is obtained, as shown in FIG. 8 , the first impression data 14 may be additionally matched with the lower jaw of the intermediate matching data 17 to generate the first matching data 18 . Contrary to this, it is also possible to align the lower jaw first and then additionally align the upper jaw.

9 and 10 are views for explaining a matching process between face scan data and primary matching data according to some embodiments of the present invention.

Referring first to FIG. 9 , a process of generating final matching data 21 by matching face scan data 16 of a smiling face of a patient with primary matching data 18 is shown. The virtual occlusion system 1 performs 3-point registration using, for example, points such as the tip of the eyes 19 and the tip of the nose 20, so that the face scan data 16 and the primary registration data in the patient's smile (18) can be matched.

Referring to FIG. 10 , when an error occurs in the process of matching the facial scan data 16 of the patient's smiling face and the primary matching data 18, the user can use the manipulator (displayed through the output unit 140) 22, manipulator) can reduce the matching error. The manipulator 22 vertically or horizontally moves the face scan data 16 of the patient's smile and the primary matching data 18 at predetermined intervals (for example, by 0.1 mm) by user manipulation. or rotated at a predetermined angle (for example, by 1°) to increase the accuracy of the matching. In addition, the registration error can be reduced by providing a CT cross-section image, determining the registration error from the CT cross-section, and fine-tuning the matching error.

11 is a flowchart illustrating a detailed process of designing a tray using first impression data generated according to some embodiments of the present invention.

Referring to FIG. 11 , the virtual occlusion system 1 generates first impression model data in a three-dimensional form from first impression body data, which is surface data, among registration data (S211). Subsequently, the first inflection point of the first impression model data is assigned as a first reference point (S212), a first tray line is created at a preset distance from the assigned first reference point (S213), and at the first tray line A final tray line is created in consideration of the thickness of the impression material (S214). Then, by allocating the thickness of the tray in consideration of the strength in the final tray line, a final tray in a three-dimensional form is created (S215), and the generated final tray is converted into an outputable form (eg, STL file) (S216 ) and then output through a 3D printer (S217).

12 is a diagram illustrating an example of setting the height of impression model data manufactured using primary impression data generated according to some embodiments of the present invention.

The virtual occlusion system 1 has a vertical height i (eg, i = 2) mm, a horizontal area, starting from the denture base margin 24, which is the deepest part in the first impression data 14 in the form of the first impression body. Assign j (eg, j = 4) mm, and make the first impression to be k (eg, k = 20) mm thick based on the user-set value or the lowest point of the first impression data 14 Fill the inside of the data (14). If the first impression model data 23 is created after impression acquisition, the user-set value or k (for example, k=20) mm thickness is determined based on the lowest point of the first impression model data 23 1 Impression model data 23 is created. The reason why the height of the first impression model data 23 is set is that it is a key point for matching with second impression data acquired later.

13 is a view showing a screen for automatically setting a first reference point of impression model data to automatically manufacture a tray according to an embodiment of the present invention.

Referring to FIG. 13, the virtual occlusion system 1 has first impression model data 23 manufactured with a vertical height i (eg, i = 2) mm and a horizontal area j (eg, j = 4) mm. ), it is possible to automatically set the first reference point 25, which is a reference point for tray manufacturing. The first reference point 25 may be a position corresponding to the first inflection point of the first impression model data 23 and corresponds to the denture base margin.

14 is a diagram illustrating a screen in which a primary tray line is automatically set based on a first reference point set according to some embodiments of the present invention.

Referring to FIG. 14, the virtual occlusion system 1 automatically creates a primary tray line 26 at a preset distance l (eg, 2 to 3) mm upwards based on the first reference point 25. can do. The difference between the second impression data and the first impression data is the shape of the denture base margin. Since the denture base margin must be obtained as an impression material, it must be manufactured as short as a preset distance l (eg, l = 2 to 3) mm based on the first reference point 25, which is the denture base margin.

15 is a diagram illustrating a screen for automatically setting a final tray line according to some embodiments of the present invention.

Referring to FIG. 15, the virtual occlusion system 1 has a thickness of mm at a preset distance m (eg, m=1.5 to 2) mm based on the first tray line 26 after the first tray line 26 is created. to create the final tray line 27. The reason for allocating the thickness of the preset distance m (eg, m = 1.5 to 2) mm is the thickness of the impression material. In the case of manufacturing with ready-made trays, the thickness of the impression material is difficult to be uniform, and there is a possibility of deformation of the impression body, which is the secondary impression data.

16 is a diagram illustrating a screen for automatically completing a three-dimensional shape of a final tray according to some embodiments of the present invention.

Referring to FIG. 16, the virtual occlusion system 1 allocates a thickness of a preset length n (eg, n=1.5 to 2.0 mm) based on the final tray line 27 after the final tray line 27 is created. Thus, the final tray 28 of a three-dimensional shape can be automatically completed. 13 to 16 show an example of generating an upper tray according to an embodiment of the present invention, and FIG. 22 shows a three-dimensional shape of the lower tray. Since the manufacturing method of the lower tray is also similar to that of the upper tray, a detailed description thereof will be omitted.

17 is a diagram illustrating markers that enable precise registration with trays produced according to some embodiments of the present invention.

Referring to FIG. 17 , the virtual occlusion system 1 has markers 29 for precisely matching the generated second impression data with the pre-designed tray 30 when the second impression data is generated after obtaining the second impression body later. ) can be created. The position of the marker 29 may be the anterior and both posterior teeth of the tray 30 .

The tray 30 designed according to the amount of impression material injected into the tray 30 may change its position in the oral cavity of the patient. Therefore, as shown in (a) of FIG. 17, it is possible to stably seat the impression material by designating the stopper thickness as much as the thickness of the impression material set by the user inside the tray 30. In addition, as shown in (b) of FIG. 17, a hole through which excess impression material can be discharged due to a stopper may be provided. The impression material enters this hole and the tray 30 and the impression material can be better bonded.

18 is a diagram showing a screen for generating a Camper's plane from obtained CT data according to some embodiments of the present invention.

Referring to FIG. 18, the virtual occlusion system 1 automatically or manually connects the upper edge 32 of the external acoustic meatus and the lower point 33 of the alar wing to create a camper plane 31. can The camper plane 31 may be substantially parallel to the occlusal plane used as the reference plane for manufacturing upper teeth.

19 is a view showing a state in which an upper jaw plate is automatically created parallel to a Camper plane created according to some embodiments of the present invention.

Referring to FIG. 19 , the virtual occlusion system 1 may automatically create an upper plate 34 and a lower guide pin 35 on the patient's CT data after automatically completing the shape of the tray. For example, the mandibular guide pin 35 and the maxillary plate 34 may be created using occlusal plane and facial metrology. The upper plate 34 is an area where occlusal data of the patient is acquired by the guide pins 35 of the lower jaw. After automatically generating the upper plate 34 of the upper tray and the guide pins 35 of the lower tray to be parallel to the Camper plane 31, they can be moved as a group. Similarly, after creating guide pins on the mandibular plate and maxilla, they can be moved as a group.

20 is a diagram illustrating an example of setting a vertical height using a face measurement method on a screen in which CT data and face scan data generated according to some embodiments of the present invention are matched.

Referring to FIG. 20, when the virtual occlusion system 1 arranges the plate on the upper tray, the guide pins of the lower jaw are automatically placed on the lower tray, and the pupil 36 is displayed on the Sagittal View of the screen where CT data and face scan data are matched. And the guide pin length of the lower jaw may be automatically presented based on the distance 38 between the angles of the mouth 37 . At this time, information that the distance 38 between the pupil and the corner of the mouth is equal to the distance 41 between the tip of the nose 39 and the center 40 of the lower jaw can be used by the facial measurement method. The length of the guide pin may be additionally provided by user setting, and for example, the output unit 140 may form a marking line in units of a predetermined length (eg, 1 mm) and provide it to the user. . This is to allow the user to adjust the length when acquiring the occlusion data after obtaining the second impression data to correct the vertical dimension suitable for the patient.

In FIG. 20, a guide pin mounted on the lower jaw is taken as an example, but the guide pin is equally applicable to a case where the guide pin is mounted on the upper jaw.

21 is a diagram of an upper tray formed in accordance with some embodiments of the invention, and FIG. 22 is a diagram of a mandibular tray formed in accordance with some embodiments of the invention.

Referring first to FIG. 21 , (a) of FIG. 21 is a front view of the upper tray, (b) is a top view of the upper tray, and (c) is a side view of the upper tray.

The virtual occlusion system 1 integrally forms the upper plate 43 for acquiring occlusion data on the upper tray 42, scans the occlusion data obtained later, and precisely registers the scanned occlusion data with the tray. A marker 44 for registration may be generated on the upper plate 43 of the upper tray 42 and then output. 21 shows that a wax rim 45 is additionally formed on the upper tray 42.

Referring to FIG. 22, (a) is a front view of the mandibular tray, (b) is a top view of the mandibular tray, (c) is a side view of the mandibular tray, and (d) is a perspective view of the guide pins.

The virtual occlusion system 1 may output the lower tray 46 separately from the guide pins 47 for acquiring occlusion data. In order to acquire accurate occlusion data, the vertex 48 of the guide pin 47 may be set to be sharp. Like the upper tray 42, the lower tray 46 is also shown with a wax rim 49 additionally formed. The markers 52 on the lower tray 46 can then be used in registration with the upper tray 42 .

21 and 22, the upper plate 43 is formed integrally with the upper tray 42, and the tray in which the lower tray 46 and the guide pins 47 are disposed is exemplarily described, but formed by the present invention The tray is not limited thereto. A guide pin may be disposed on the upper tray 42 or a lower plate may be integrally formed with the lower tray 46 .

FIG. 23 is a diagram illustrating obtaining secondary impression data of the upper jaw from a patient's secondary upper jaw impression body according to some embodiments of the present invention, and FIG. 24 is a diagram illustrating a second impression of the lower jaw from a patient's secondary lower jaw impression body. It is a diagram showing acquiring data.

Referring first to FIG. 23, (a) of FIG. 23 is a front view of the upper jaw tray on which the secondary impression body of the upper jaw is formed, (b) is a top view of the upper jaw tray, and (c) is a side view of the upper jaw tray.

The virtual occlusion system 1 scans the second impression of the upper jaw (negative shape) and then creates a corresponding model of both shapes, or scans a model made by pouring plaster on the second impression of the upper jaw to scan the second impression of the upper jaw. Data 50 can be generated.

Referring to FIG. 24 , (a) is a front view of the mandibular tray on which the second impression body of the mandible is formed, (b) is a top view of the mandibular tray, and (c) is a side view of the mandibular tray.

The virtual occlusion system 1 may generate the second impression data 51 of the lower jaw by scanning the second impression body of the lower jaw or by scanning a model manufactured by pouring gypsum on the second impression body of the lower jaw.

25 is a diagram for explaining generating static occlusion data by matching upper and lower secondary impression data and central occlusion data according to some embodiments of the present invention.

Referring to (a) of FIG. 25 , the virtual occlusion system 1 matches the secondary impression data 50 of the upper jaw, the secondary impression data 51 of the lower jaw, and central occlusion data to obtain static occlusion data 53. can create

Center occlusion data is obtained by installing the guide pins 47 on the lower tray 46 and fixing the upper tray 42 to the lower tray 46 through the guide pins 47, the upper tray 42 and the lower tray ( 46) can be obtained by the positional relationship between

On the other hand, as shown in (b) of FIG. 25, the upper tray 42 designed by steps S215 and S216 of FIG. 11 using the marker 44 disposed on the upper plate 43 indicates the movement direction of the upper tray 42 and the lower jaw. The movement path 54 can be more finely matched.

26 is a diagram for explaining matching of static occlusion data and CT data or face scan data according to some embodiments of the present invention.

Referring to FIG. 26 , a result of matching static occlusion data 53 generated according to some embodiments of the present invention and CT data 13 may be output through the output unit 140 . In contrast, the result of matching the face scan data 15 and the static occlusion data 53 or the result of matching the CT data 13 and the face scan data 15 and the static occlusion data 53 outputs the output unit 140. Data selected by the user can be output through the Show/Hide function, or matched data can be output to the user so that they can be overlapped through Opacity control.

27 is a diagram for explaining generating dynamic occlusion data using a movement path formed on an upper plate according to some embodiments of the present invention.

Referring to FIG. 27, (a) of FIG. 27 is dynamic occlusion data generated from the right movement of the mandible, (b) is dynamic occlusion data generated from the left movement of the mandible, and (c) is dynamic occlusion data generated from the anterior movement of the mandible. Shows motion occlusion data generated from motion.

As shown in FIG. 27 , the virtual occlusion system 1 may acquire dynamic occlusion data generated from rightward, leftward, and forward movements of the lower jaw in the mouth in a state in which the upper jaw is fixed. The dynamic occlusion data is, for example, scanning intraoral movement of the trays 42 and 46 while the patient is wearing the tray formed through the above process, or the lower jaw relative to the upper tray 42 to which the control unit 130 is fixed. It can be obtained by simulating rightward, leftward and forward movements of the tray 46.

Dynamic occlusion data generated from intraoral movements of the trays 42 and 46 can also be matched and output with the CT data 13 and/or the face scan data 15, and the Show/Hide function can be used. Through this, data selected by the user can be output, or data matched through opacity control can be output to the user so that they can be overlapped.

A motion path 54 representing the movement direction of the lower jaw may be displayed on the upper jaw plate 43 . When the patient wears dentures to exercise the lower jaw, the motion path may be limited by the dentures arranged on the upper and lower jaws, and movement when virtual teeth are arranged on the upper and lower trays 42 and 46 below Regarding the restriction to , it will be described using FIG. 28 .

28 is a diagram for explaining motion path limitation settings according to virtual tooth arrangements after obtaining dynamic occlusion data according to some embodiments of the present invention.

Referring to FIG. 28, in the dynamic occlusion data information during the movement of the left side, simulation results regarding the movement of the lower jaw are shown for a plurality of control points P1, P2, P3, and P4 that partition the exercise path 54. .

The virtual occlusion system 1 provides the user with control points P1, P2, P3, and P4 dividing the exercise path 54 at predetermined movement intervals. 28 (a) to (d) show that the width of the movement line 56 of the mandibular buccal cusp relative to the reference line 55 is 0.5 mm (Fig. 28 (a)), 1.0 mm (Fig. 28 (b)), Simulation results for the case of 1.5 mm (FIG. 28 (c)) and 2.0 mm (FIG. 28 (d)) are shown. Here, the reference line 55 may be set based on the static occlusion data 53 . In addition, the width of the movement line 56 of the mandibular buccal cusp with respect to the reference line 55 is not limited to being displayed by moving by 0.5 mm, and the exercise path 54 indicating the movement direction of the mandible is divided into N equal parts by the user's setting ( N is a natural number of 2 or more).

Prior to limiting the exercise path 54, the upper and lower virtual teeth are arranged. In the virtual occlusion system 1, for example, the control unit 130 generates tooth arrangement data using the occlusion plane or the static occlusion data 53 used in the process of manufacturing the trays 42 and 46 described above, or the user It is possible to generate upper and lower tooth arrangement data through an input provided from .

During the movement to the left of the mandible, the mandible moves according to the result of the virtual tooth arrangement, and the movement path after the point where the lingual cusp of the upper jaw and the buccal cusp of the lower jaw meet or the movement path after the point where the buccal cusp of the upper jaw and the buccal cusp of the lower jaw meet Since the user does not need to consider, the movement path 54 may be limited and shown. As described later, this is the movement after the point where the lingual cusp of the upper jaw and the buccal cusp of the lower jaw meet or the buccal cusp of the upper jaw and the buccal cusp of the lower jaw meet in relation to the preparation of the early contact between the maxillary teeth and the mandibular teeth. This is because the furnace and occlusal strength do not need to be considered. Therefore, the user can limit the exercise path of the lower jaw by selecting one of the control points P1, P2, P3, and P4 on the exercise path 54 partitioned at predetermined intervals.

The control unit 130 receives a control point for limiting a movement path from the user, or simulates a contact result between the upper lingual cusp and the lower buccal cusp or a contact result between the upper and lower buccal cusps from a virtual tooth array to exercise limits can be set automatically.

In FIG. 28, the motion path restriction is described based on the movement of the left side of the lower jaw, but the present invention is not limited thereto. That is, a movement path restriction can be set for the forward movement of the lower jaw. The control unit 130 receives a control point for limiting the movement path from the user, or the cutting plane of the anterior upper jaw and the anterior lower jaw from the virtual tooth arrangement. Motion path limits can be set automatically by simulating the result of contact between objects.

In addition, the limited movement path may be changed due to tooth removal to eliminate premature contact, which will be described later. Accordingly, the virtual occlusion system 1 may newly display the exercise path changed by tooth deletion or the like to the user.

29 is a flowchart illustrating a process of automatically or manually adjusting an intersection point using static and dynamic occlusion data according to an embodiment of the present invention.

Referring to FIG. 29 , the method for automatically or manually adjusting the occlusion point using static and dynamic occlusion data according to an embodiment of the present invention includes setting a motion path limit (S311) and displaying the occlusion strength (S312). , determining that the occlusal point needs to be adjusted for a region having an occlusal strength greater than or equal to a predetermined range (S313), and manually adjusting the occlusal point through automatic, manual deletion, or gear axis rotation (S314). Hereinafter, the remaining steps except for the previously described motion path limit setting step (S311) will be described.

30 is a diagram for explaining setting an occlusal surface table according to some embodiments of the present invention.

Referring to FIG. 30 , the virtual occlusion system 1 may set an occlusal surface table for the upper and lower jaws based on the cusp crown and the marginal ridge, and display the occlusal table to the user through the output unit 140 . The occlusal surface table is divided into a buccal area and a lingual area based on the central sphere, which is the deepest part, and the virtual occlusal surface table 1 may separately set an area not included in the occlusal surface table and display it to the user.

In deleting an occlusal point to be described later, the virtual occlusal system 1 may be configured to automatically or manually delete an occlusal point in the area of the occlusal surface table.

31 is a diagram for explaining display of occlusal strength to a user according to some embodiments of the present invention.

Referring to FIG. 31 , the virtual occlusion system 1 may calculate occlusion strength based on the distance between the virtual upper teeth 59 and lower teeth 60 . The virtual occlusion system 1 may output the occlusion strength calculated in the occlusion area 61 to the user. FIG. 31 shows the occlusal area 61 by visualizing the distance between the virtual upper teeth 59 and the lower teeth 60 as the occlusal strength goes from red to gray in the virtual occlusion system 1 .

The control unit 130 may determine that a specific area needs to be adjusted for an occlusal point when the occlusal strength between the virtual upper teeth 59 and the lower teeth 60 exceeds a predetermined range. As will be described later, the region requiring occlusal adjustment may be automatically or manually deleted, or occlusion adjustment may be performed by rotating the tooth axis of the corresponding tooth.

Although the occlusion strength in the central occlusion state is illustratively shown in FIG. 31, the present invention is not limited thereto, and the virtual occlusion system 1 provides occlusion in a dynamic occlusion state in which the mandible moves left, right, and forward. Intensity can also be visualized.

32 to 34 are diagrams for explaining a process of adjusting the occlusion point by detecting and automatically or manually deleting a part where early contact occurs when simulating virtual occlusion.

Referring first to FIG. 32 , the tooth arrangement and occlusal strength of the occlusal region in the center occlusal state of the maxillary teeth 59 and the mandibular teeth 60 are shown. Since the maxillary and mandibular teeth are in the centric occlusion state, the control point P remains at the basic position on the movement path 54 indicated on the maxillary plate 43.

Referring to FIG. 33 , simulation results of the motion of the mandible are shown for the plurality of control points P1 , P2 , P3 , P4 , and P5 that partition the movement path 54 in the forward motion of the mandible. A plurality of control points (P1, P2, P3, P4, P5) are partitioned to have an interval of 0.5 mm each.

Figure 33 (a) to (e) shows the state of the dynamic occlusion corresponding to the five control points (P1, P2, P3, P4, P5) each partitioned on the exercise path (54). As shown in (a) to (e) of FIG. 33, occlusal strengths 61a, 61b, 61c, 61d, and 61e calculated based on the distance between the upper teeth 59 and the lower teeth 60 are obtained in the upper and lower jaws. It can be displayed on the mandibular teeth 59 and 60, respectively. In contrast, all of the occlusal strengths 61a, 61b, 61c, 61d, and 61e calculated based on the distance between the upper and lower teeth 59 and the lower teeth 60 are displayed on both the upper and lower teeth 59 and 60. may be

The user can limit the exercise path of the lower jaw by selecting one of the control points P1 , P2 , P3 , P4 , and P5 on the exercise path 54 partitioned at predetermined intervals. Alternatively, the virtual occlusion system 10 may automatically set motion path restrictions based on the occlusion strengths 61a, 61b, 61c, 61d, and 61e calculated based on the distance between the upper teeth 59 and the lower teeth 60. can

The output unit 140 displays, for example, the divided exercise path 54 as a dotted line, but when one of the control points P1, P2, P3, P4, and P5 is selected, the path from the starting point to the selected control point is displayed. It may be displayed as a solid line or displayed in a color different from that of the partitioned exercise path 54 .

Referring to FIG. 34, (a) of FIG. 34 shows a region 62 to be removed to eliminate premature contact between the upper teeth 59 and the lower teeth 60, and (b) of FIG. The occlusal strength of the upper teeth 59 and the lower teeth 60 after occlusal adjustment is made by automatically or manually deleting the contact area is shown.

The virtual occlusion system 1 proposes a region 62 to be deleted among the maxillary teeth 59 based on the bite strength calculated using FIG. 33 ( 61a to 61e in FIG. 32 ), and the user selects or automatically When the corresponding region 62 is deleted, the occlusal strength may be newly calculated based on the new upper teeth 63 and lower teeth 60 and output. In addition, the virtual occlusion system 1 automatically deletes the region 62 to be deleted among the maxillary teeth 59 based on the occlusion strength (61a to 61e in FIG. 33) calculated using FIG. ) and the new bite strength between the lower teeth 60 may be calculated and output.

35 to 36 illustrate a process of setting an occlusion point and determining a deletion area when an early contact occurs due to manual adjustment by a user in a central occlusion state of the virtual occlusion system according to some embodiments of the present invention.

Referring to FIG. 35, (a) of FIG. 35 is a state in which central occlusion is completed, and (b) of FIG. 35 is an early contact (64 ) is shown. The virtual occlusion system 1 can recognize that the guide pins 47 of the lower tray are separated from the upper plate 43 . The virtual occlusion system 1 may calculate the occlusion strength of the region 65 where early contact occurs and output it to the user in the form of contour lines or colors through the output unit 140 . In addition, the virtual occlusion system 1 may display the area 65 where early contact occurs as shown in FIG. 35(b), specify and display teeth where early contact occurs, or display the tooth list together.

Referring to FIG. 36, in (a) of FIG. 36, the virtual occlusion system 1 simulates moving the mandible to the left until the limit movement on the non-working side (the point where the upper lingual cusp and the lower buccal cusp meet), and then moves the lower jaw to the working side. If there is contact between the cusps of (66), the abutment point of the central sphere (68) of the upper jaw that abuts with the buccal cusp (67) of the lower jaw that was in early contact can be automatically or manually deleted until the guide pin of the lower jaw touches the upper plate. there is.

The virtual occlusion system 1 recognizes the highest part of the teeth of the lower jaw that contacts the buccal cusp 67 of the lower jaw, sets an area around the part, and the central sphere 68 of the upper jaw is the tooth of the upper jaw that contacts. Recognizes the deepest part in , and sets the area around that part. That is, the virtual occlusion system 1 sets the area based on the central sphere (the deepest part) and the cusp (the most protruding part) of the tooth as shown in FIG. 30 in determining the preparation area, and automatically or manually can be deleted with

When the deletion is completed, the occlusal strength may be displayed to the user as contour lines and colors in the central occlusion state, as shown in (b) of FIG. 36 .

37 to 38 are diagrams for explaining a process of setting an occlusion point and determining a deletion area when an early contact occurs due to manual adjustment by a user in a dynamic occlusion state in a virtual occlusion system according to some embodiments of the present invention. .

Referring to FIG. 37, (a) of FIG. 37 is a state in which central occlusion is completed, and (b) of FIG. A case in which contact on the work side (left side) does not occur is shown. A contact area 69 on the work side and a non-contact area 70 on the non-work side are respectively shown.

The virtual occlusion system 1 may calculate the occlusion strength of the region 69 where early contact occurs and output it to the user in the form of contour lines or colors through the output unit 140 .

Referring to FIG. 38, in (a) of FIG. 38, the virtual occlusion system 1 re-simulates the upper and lower jaws in a centrally occluded state, and the inner slope 71 between the early contacted central sphere of the upper jaw and the buccal cusp of the upper jaw ) and the abutment point of the inner slope 72 between the central sphere of the mandible and the lingual cusp of the mandible, which were in early contact, can be automatically deleted by 1/2 until the non-working sides come into contact with each other. In this case, the occlusal point at the time of central occlusion may be excluded from the deletion area, and specifically, the occlusal point at the time of central occlusion and the occlusal point at the time of dynamic occlusion may be displayed in different colors so as to be distinguished.

After deletion is completed, in FIG. 38(b), when the virtual occlusion system 1 simulates dynamic occlusion through right side movement, it can be confirmed that contact occurs on both the working side and the non-working side.

In conclusion, in determining the preparation area for resolving the premature contact generated in central occlusion or dynamic occlusion described in the embodiments of FIGS. A contact area may be determined, and a result of deleting the determined area may be output to the user.

However, the virtual occlusion system 1 may set bilateral balanced occlusion by rotating the tooth axis of the virtual teeth instead of the above-described deletion in order to eliminate premature contact. This will be explained with reference to FIG. 39 below.

39 is a view for explaining setting bilateral balanced occlusion through rotation of the tooth axis of virtual teeth according to some embodiments of the present invention.

Referring to FIG. 39, (a) of FIG. 39 shows a case in which non-contact occurs with the left tooth 74 in the final limit motion when simulated with rightward motion. In this case, the virtual occlusion system 1 provides the manipulator 75 to the user and receives the user's input through the user interface 120 so that the cusps of the left teeth 74 are formed as shown in FIG. 39(b). The tooth shafts 76 can be rotated to bring them into contact with each other.

The control unit 130 may recalculate the occlusal strength changed due to the rotated tooth axis or early contact, and display the result to the user through the output unit 140 .

As such, the virtual occlusion system 1 may manufacture a user-customized tray and automatically or manually adjust the occlusion points of virtual teeth using dynamic and static occlusion data generated using the tray. That is, rather than adjusting the occlusal point by inputting arbitrary data for the semi-adjustable articulator registered in a pre-stored library, static occlusion and dynamic occlusion data are generated to fit the shape of the oral tissue of the patient. Improve the accuracy of denture formation for edentulous patients by providing automatic or manual deletion of virtual teeth or rotation of the tooth axis to determine the case of premature contact between teeth using the generated static occlusion and dynamic occlusion data and resolve it. It can also improve the stability of the formed denture.

The present invention can also be implemented as computer readable codes on a computer readable recording medium. A computer-readable recording medium includes all types of recording devices in which data that can be read by a computer device is stored. Examples of computer-readable recording media include hard disks, ROMs, RAMs, CD-ROMs, hard disks, magnetic tapes, floppy disks, optical data storage devices, etc., and carrier waves (for example, transmission over the Internet). It also includes what is implemented in the form of.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. you will be able to understand Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting.

1: virtual occlusion system 110: data acquisition unit
120: user interface 130: control unit
140: output unit 150: storage unit

Claims (20)

matching CT data obtained from a patient with first impression data, and forming a tray using the matched first impression data;
generating static occlusion data and dynamic occlusion data using the tray;
generating virtual upper teeth and lower teeth arrangement data using the static occlusion data; and
Automatically or manually adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data,
How the virtual occlusion system works. According to claim 1,
The step of generating the static occlusion data using the tray,
Acquiring secondary impression data of the upper and lower jaws, and
Creating static occlusion data by matching the upper and lower secondary impression data and central occlusion data,
How the virtual occlusion system works. According to claim 1,
Generating the dynamic occlusion data using the tray includes generating dynamic occlusion data from the movement of at least one of the front, right side, and left side of the oral cavity of the tray,
How the virtual occlusion system works. According to claim 1,
Further comprising limiting the motion path of the lower jaw according to the contact between the virtual upper jaw teeth and the lower jaw teeth after the step of generating the dynamic occlusion data.
How the virtual occlusion system works. According to claim 4,
The limitation of the exercise path is that the right or left movement is based on the contact between the lingual cusp of the upper jaw and the buccal cusp of the lower jaw, or the contact between the buccal cusp of the upper jaw and the buccal cusp of the lower jaw, and in the case of forward movement, the upper anterior teeth from the virtual tooth arrangement. Based on the contact between the incisal surface of and the incisal surface of the lower anterior teeth,
How the virtual occlusion system works. According to claim 1,
The step of automatically or manually adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data,
Displaying the bite strength between the virtual upper and lower teeth, and
Determining that an area in which the occlusal strength exceeds a predetermined range needs an occlusal point adjustment,
How the virtual occlusion system works. According to claim 6,
The step of automatically or manually adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data,
Including deleting the early contact area based on the central sphere and the cusp of the tooth when early contact between the virtual upper and lower teeth occurs,
How the virtual occlusion system works. According to claim 6,
Adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data,
Adjusting the occlusion strength by rotating a tooth axis with respect to a tooth including a region in which the occlusion point needs to be adjusted,
How the virtual occlusion system works. According to claim 6,
Adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data,
Further comprising the step of specifying and displaying a tooth in which early contact has occurred among the virtual upper and lower teeth, or displaying a list of teeth in which early contact has occurred,
How the virtual occlusion system works. a data acquiring unit acquiring CT data and first impression data from the patient;
a control unit that matches the acquired CT data and primary impression data and forms a tray using the matched primary impression data;
an output unit for displaying the dental image processed by the control unit; and
Including a user interface for receiving a manipulation signal from a user for the dental image,
The control unit,
The data acquisition unit receives the secondary impression data of the upper and lower jaws acquired using the tray and intraoral movement of the tray,
Creating static occlusion data by matching the secondary impression data of the upper and lower jaws, and generating dynamic occlusion data from intraoral movement of the tray;
Automatically or manually adjusting the occlusion point between the virtual upper and lower teeth using the static occlusion data and the dynamic occlusion data,
Virtual occlusal system. According to claim 10,
The control unit generates dynamic occlusion data from the movement of at least one of the front, right side, and left side of the tray in the oral cavity.
Virtual occlusal system. According to claim 10,
The control unit limits the movement path of the lower jaw according to the contact between the virtual upper teeth and lower teeth based on the user's input.
Virtual occlusal system. According to claim 12,
The restriction of the movement path is based on the contact between the lingual cusp of the upper jaw and the buccal cusp of the lower jaw or the contact between the buccal cusp of the upper jaw and the buccal cusp of the lower jaw in the right or left movement, and in the case of the forward movement, the anterior maxilla from the virtual tooth arrangement. Based on the contact between the incisal surface and the incisal surface of the lower anterior teeth,
Virtual occlusal system. According to claim 12,
The control unit displays control points that divide the exercise path at predetermined intervals through the output unit, and divides and displays the path to the restricted exercise path.
Virtual occlusal system. According to claim 10,
The control unit displays bite strength between the virtual upper and lower teeth through the output unit,
Determining that an area in which the occlusal strength exceeds a predetermined range is required to adjust the occlusal point,
Virtual occlusal system. According to claim 15,
The control unit proposes to automatically or manually delete the early contact area based on the central sphere and the cusp of the tooth when early contact occurs between the virtual upper and lower teeth,
Virtual occlusal system. According to claim 15,
The user interface receives a command to rotate the tooth axis of the tooth including the region in which the occlusal point needs to be adjusted,
The control unit adjusts the occlusal strength based on the rotated tooth axis.
Virtual occlusal system. According to claim 15,
The control unit deletes the area in which the occlusal strength exceeds a predetermined range through manual adjustment or automatically deletes and displays it through the output unit.
Virtual occlusal system. According to claim 15,
The control unit identifies and displays teeth in which early contact has occurred among the virtual upper teeth and lower teeth through the output unit, or displays a list of teeth in which early contact has occurred,
Virtual occlusal system. A computer program stored in the computer-readable recording medium in which a program for executing any one of the methods of claims 1 to 9 using a computer is recorded.

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