KR102209965B1 - Apparatus And Method For Fixing Tooth Model Using Hydraulic - Google Patents

Abstract

A tooth model fixing apparatus and method using hydraulic pressure are disclosed. At this time, the tooth model fixing device may fix the tooth model seated on the jig base with a plurality of supports that move by hydraulic pressure, thereby fixing the tooth model without a gum model. In addition, when the cylinder continues to apply pressure while the supports and the tooth model are in contact with each other, the support does not move to the tooth model as the liquid filled in the tube is compressed. This can prevent the tooth model from being damaged.

Description

Apparatus And Method For Fixing Tooth Model Using Hydraulic}

The present invention relates to an apparatus and method for fixing a tooth model using a support in a tooth model scanner.

3D model scanners are used in the medical field to create custom instruments that fit the shape of patients in order to manufacture orthodontic instruments and teeth. In other words, the 3D model scanner scans an intraoral or tooth model to design orthodontic instruments, prostheses, artificial organs, and artificial teeth. Through this scanning process, the 3D model scanner accurately records the intraoral tissue and the position and shape of the tooth required when manufacturing an artificial tooth from the tooth model. At this time, the 3D model scanner mounts the tooth model to be scanned on the plate of the 3D model scanner using a jig for fixing the tooth model, and then scans the tooth model mounted on the plate.

In the conventional scanner, the tooth model was fixed by attaching the tooth model to the jig using an adhesive such as BlueTek, or by manually moving the supports installed on the jig.

In addition, since the scan target can have various shapes ranging from the entire upper and lower jaw to one tooth, it is difficult to fix it in the scanner device.

However, the method of attaching to the jig by using an adhesive has a problem that it is difficult to separate the tooth model from the jig after the scan is finished, and debris of the tooth model separated on the jig may remain. In addition, the method of fixing the tooth model by moving the support has a problem that the tooth model may be damaged due to excessive movement of the support by the user, or the fixing of the tooth model may become loose due to the small movement of the support. At this time, if the scan target is shaken, it becomes a factor that makes 3D scan impossible or causes a large error in the accuracy of the scan.

In addition, since the conventional scanner fixes a tooth model in the shape of a patient's teeth to the gum model and scans it, damage to the tooth model may occur in the process of applying force to fix the tooth model to the gum model. At this time, since the gum model is a consumable product, costs are incurred, time consuming, and may cause discomfort to the patient.

Accordingly, there is a demand for a method of preventing damage to a tooth model or fixing a tooth model without using a gum model.

The present invention can provide an apparatus and method capable of fixing a tooth model without an adhesive for fixing the tooth model by holding and fixing a tooth model with supports moving by hydraulic pressure.

In addition, the present invention applies pressure to the liquid filled in the tube to move the support to the tooth model, so that when the cylinder continues to apply pressure while the support and the tooth model are in contact, the liquid filled in the tube is compressed, Since does not move to the tooth model, it is possible to provide an apparatus and method capable of preventing the tooth model from being damaged by excessive pressure of the supports.

A tooth model fixing device according to an embodiment of the present invention includes a jig base on which a user's tooth model is mounted; And a fixing mechanism for fixing the tooth model by moving the plurality of supports to the position where the tooth model is seated using hydraulic pressure.

A tooth model fixing device according to an embodiment of the present invention includes a position sensor for measuring the positions of each of the supports; And a processor that determines that the tooth model is fixed when the positions of the supports do not change while hydraulic pressure is applied to the supports.

When it is determined that the tooth model is fixed, the processor of the apparatus for fixing a tooth model according to an embodiment of the present invention may stop an operation of a cylinder applying hydraulic pressure to the supports.

A tooth model fixing device according to an embodiment of the present invention further includes a model sensor for measuring whether the tooth model is seated on the jig base and a position of the tooth model seated on the jig base, the fixing mechanism, When the tooth model is mounted on the jig base, hydraulic pressure may be applied to the supports using a cylinder.

Each of the supports of the tooth model fixing device according to an embodiment of the present invention may be made of an elastic material having an elasticity such that a portion in contact with the tooth model can be adaptively deformed according to the shape of the tooth model. have.

The fixing mechanism of the tooth model fixing device according to an embodiment of the present invention may control a force applied by each of the supports toward the tooth model according to the shape of the tooth model and the portion of the tooth model in contact with the supports. I can.

A method of fixing a tooth model according to an embodiment of the present invention includes measuring whether a user's tooth model is seated on a jig base using a model sensor; And when the tooth model is mounted on the jig base, moving a plurality of supports to a position where the tooth model is mounted using hydraulic pressure to fix the tooth model.

Fixing a tooth model of a method for fixing a tooth model according to an embodiment of the present invention includes: measuring the positions of each of the supports using a position sensor; And determining that the tooth model is fixed when the positions of the supports do not change while hydraulic pressure is applied to the supports.

Fixing the tooth model of the method for fixing the tooth model according to an embodiment of the present invention may further include stopping the operation of the cylinder applying hydraulic pressure to the supports when it is determined that the tooth model is fixed. have.

Each of the supports of the method of fixing a tooth model according to an embodiment of the present invention may be made of an elastic material having elasticity such that a portion in contact with the tooth model can be adaptively deformed according to the shape of the tooth model. have.

In the fixing of the tooth model of the method for fixing a tooth model according to an embodiment of the present invention, each of the supports is applied toward the tooth model according to the shape of the tooth model and the portion of the tooth model that the supports are in contact with. You can control the power.

According to an embodiment of the present invention, it is possible to fix the tooth model with supports instead of an adhesive for fixing the tooth model.

At this time, according to an embodiment of the present invention, since an adhesive for fixing the tooth model is not used, damage to the tooth model due to a force applied to the tooth model in the process of fixing the tooth model to the gum model can be prevented.

In addition, according to an embodiment of the present invention, by applying pressure to the liquid filled in the tube with a cylinder to move the support to the tooth model, the cylinder is compressed by the pressure while the support and the tooth model are in contact with each other, and the internal pressure increases. And, when the internal pressure of the cylinder exceeds a threshold value, by stopping the operation of the cylinder, it is possible to prevent damage to the tooth model due to excessive pressure.

Further, according to an embodiment of the present invention, it is possible to easily fix the tooth model by automatically recognizing that the patient's tooth model is seated on the jig base, and automatically fixing the tooth model according to the recognition result.

1 is a view showing a scanner to which a tooth model fixing device and a tooth model fixing device are combined according to an embodiment of the present invention.
2 is an operation example of a tooth model fixing device according to an embodiment of the present invention.
3 is another operation example of the device for fixing a tooth model according to an embodiment of the present invention.
4 is a flowchart illustrating a method of fixing a tooth model according to an embodiment of the present invention.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the rights of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents, or substitutes to the embodiments are included in the scope of the rights.

The terms used in the examples are used for illustrative purposes only and should not be interpreted as limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

In addition, in the description with reference to the accompanying drawings, the same reference numerals are assigned to the same components regardless of the reference numerals, and redundant descriptions thereof will be omitted. In describing the embodiments, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the embodiments, the detailed description thereof will be omitted.

The method of fixing a tooth model according to an embodiment of the present invention may be performed by a tooth model fixing device or a scanner to which a tooth model fixing device is combined.

1 is a view showing a scanner to which a tooth model fixing device and a tooth model fixing device are combined according to an embodiment of the present invention.

The scanner 110 may fix the tooth model 130 using a tooth model fixing device. At this time, the tooth model 130 is a model formed according to a single tooth shape of a patient, a model in which a pattern of the same model as the patient's teeth is formed on a gum model (GUM) corresponding to the patient's maxilla or mandible, or a surgical guide. It can be one.

In addition, the scanner 110 may scan the entire area of the tooth model 130 by moving (rotating) the base on which the tooth model fixing device is disposed within a predetermined interval according to a driving shaft. For example, the scanner 110 may be a 3D model scanner or an oral scanner. In addition, the tooth model fixing device may automatically recognize that the patient's tooth model 130 is seated on the jig base 120. And, when it is recognized that the patient's tooth model 130 is seated on the jig base 120, the tooth model fixing device may automatically fix the tooth model 130 or automatically scan the tooth model 130. have.

The tooth model fixing device is composed of a fixture base 120, a model sensor (not shown), and a fixing mechanism for moving a plurality of supports 140 as shown in FIG. 1 to automatically fix the tooth model 130 can do. In this case, the model sensor and the fixing mechanism may be disposed under the jig base 120.

The jig base 120 may be a support on which the patient's tooth model 130 is mounted.

The model sensor may measure whether the tooth model 130 is seated on the jig base 120. For example, the model sensor may be a proximity sensor that measures an object approaching the jig base 120 using a radar signal or a laser. In this case, the model sensor may measure the distance between the object and the jig base 120. In addition, when the distance between the jig base and the object is 0, the model sensor may determine that the tooth model 130 is seated on the jig base 120. In addition, the model sensor may be a weight sensor that measures a change in weight of the jig base 120. In addition, when the weight of the jig base 120 changes, the model sensor may determine that the tooth model 130 is seated on the jig base 120.

The fixing mechanism may include a cylinder for moving the plurality of supports 140 using hydraulic pressure. At this time, a pipe filled with a liquid may be coupled between the cylinder and the plurality of supports 140.

Further, the cylinder is compressed and the liquid filled in the tube is pushed in the direction of the center of the jig base 120 so that the plurality of supports 140 may move toward the tooth model 130 along the rail. In addition, in the case of releasing the fixation of the tooth model, the cylinder pulls the liquid filled in the pipe in the outer direction of the jig base 120 under the control of the processor, so that the plurality of supports 140 are moved along the rail. 120) can also be moved in the outer direction.

If the pressure applied by the cylinder continues to increase, there is a possibility that the support 140 may damage the tooth model 130 while excessively moving in the direction of the tooth model 130 beyond the range in which the liquid can be compressed.

Therefore, when the cylinder continues to apply pressure to the liquid while the supports 140 and the tooth model 130 are in contact, the tooth model fixing device stops the cylinder, thereby preventing excessive pressure from being applied to the tooth model 130. Can be prevented. For example, the tooth model fixing device is a position sensor that measures the positions of each of the plurality of supports 140 and when the positions of the supports 140 do not change while hydraulic pressure is applied to the supports 140, the tooth model A processor that determines that 130 is fixed may be included.

In addition, when the cylinder continues to apply pressure to the liquid while the supporters 140 and the tooth model 130 are in contact, the supporters 140 can no longer move by the tooth model 130, so the inside of the cylinder Pressure can increase. Accordingly, the processor may measure the internal pressure of the cylinder using a pressure sensor included in the cylinder. In addition, when the internal pressure of the cylinder measured by the pressure sensor exceeds the threshold value, the processor may determine that the tooth model 130 is fixed.

At this time, the processor, which determines that the tooth model 130 is fixed, stops the operation of the cylinder so that the hydraulic pressure applied to the supports 140 does not increase, thereby preventing damage to the tooth model 130 by the supports 140. I can. Also, the processor determining that the tooth model 130 is fixed may request the scanner 110 to scan the tooth model.

In addition, when the tooth model 130 is seated on the jig base 120, the fixing mechanism drives the cylinder to move the plurality of supports 140 toward the tooth model 130, so that the jig base 120 The located tooth model 130 may be fixed. In this case, each of the plurality of supporters 140 may be disposed at a position divided at the same predetermined angle based on the center of the jig base 120. In addition, each of the plurality of supports 140 may be made of an elastic material having elasticity such that a portion in contact with the tooth model 130 may be adaptively deformed according to the shape of the tooth model 130. At this time, each of the supports 140 deforms a portion in contact with the tooth model 130 according to the shape of the various tooth models 130, so that the fixing force for the tooth model 130 may be increased. At this time, the deformed portion of the support 140 may be restored to an initial shape by elasticity when the support 140 is separated from the tooth model 130. However, depending on the embodiment, the support 140 may be manufactured using a rigid material such as a bolt.

A tooth model fixing device according to an embodiment of the present invention can provide an apparatus and method capable of fixing a tooth model without an adhesive for fixing the tooth model by holding and fixing the tooth model with supports that move by hydraulic pressure. have.

At this time, since the tooth model fixing device according to an embodiment of the present invention does not use an adhesive for fixing the tooth model 100, it is applied to the tooth model 100 in the process of fixing the tooth model 100 to the gum model. It is possible to prevent damage to the tooth model 100 by force.

In addition, the tooth model fixing apparatus according to an embodiment of the present invention applies pressure to the liquid filled in the tube with a cylinder to move the support to the tooth model, so that the cylinder is compressed by pressure while the support and the tooth model are in contact. When the internal pressure increases and the internal pressure of the cylinder exceeds a threshold value, by stopping the operation of the cylinder, it is possible to prevent damage to the tooth model due to excessive pressure.

And, the tooth model fixing device according to an embodiment of the present invention automatically recognizes that the patient's tooth model 100 is seated on the jig base 130, and automatically fixes the tooth model 100 according to the recognition result. By doing so, the tooth model 100 can be easily fixed.

2 is an operation example of a tooth model fixing device according to an embodiment of the present invention.

As shown in FIG. 2, the first support 211 for holding the right molar tooth formed or combined portion in the tooth model 130, the left molar tooth formed in the tooth model, or for holding the combined portion A second support 212, a third support 213 for holding an anterior tooth formed in the tooth model or the front side of the joined portion, and a fourth support for holding the rear surface of the tooth model with an anterior tooth formed or joined (214) may be included. In addition, in FIG. 2, the fixing mechanism includes four supports, but according to an embodiment, the number of supports included in the fixing mechanism may be selected from two or more integers. Further, the first support 211 and the fourth support 214 may include a holder 200 for fixing the tooth model as shown in FIG. 2.

Step 210 may be performed when the model sensor determines that the tooth model 130 is not seated on the jig base 120. At this time, by pulling the cylinder 215 as shown in Fig. 2, the fixing mechanism allows the first support 211, to the fourth support 214 to move along the rail in the outer direction of the jig base 120. I can. In addition, when the model sensor measures that the tooth model 130 is seated on the jig base 120, step 220 may be performed.

In step 220, the fixing mechanism pushes the cylinder 215 as shown in FIG. 2 so that the first support 211 and the fourth support 214 move according to the pressure of the cylinder 215. The tooth model may be fixed by moving the tooth model 130 to the center of the jig base on which the tooth model 130 is mounted. At this time, the pressure sensor 216 inside the cylinder 215 may measure the pressure inside the cylinder 215.

And, when the internal pressure of the cylinder 215 measured by the pressure sensor 216 exceeds the threshold value, the processor determines that the tooth model 130 is fixed and stops the operation of the cylinder 215, thereby first It is possible to prevent the tooth model 130 from being damaged by the support 211 and the fourth support 214.

In addition, the holder 200 is made of an elastic material and is deformed according to the shape of the tooth model 130 in contact as shown in step 220 of FIG. 2, so that the first support 211 and the fourth support 214 may be made to fix the tooth model 130 more strongly.

3 is an example of the operation of the tooth model fixing device when a tooth model 300 modeling the shape of one of the patient's teeth among tooth models is used.

The fixing mechanism may include supports for fixing the tooth model 300 in a plurality of different directions as shown in FIG. 3. In this case, the supports may be made of an elastic material having elasticity enough to be adaptively deformed according to the shape of the tooth model 130.

Step 310 may be performed when the model sensor determines that the tooth model 300 is not seated on the jig base 120. At this time, the fixing mechanism may allow the supports 311 to move in the outer direction of the jig base 120 along the rail by pulling the cylinder 312 as shown in FIG. 3. In addition, when the model sensor measures that the tooth model 300 is seated on the jig base 120, step 320 may be performed.

In step 320, the fixing mechanism pushes the cylinder 312, as shown in FIG. 3, so that the support 311 is mounted along the rail by the liquid moving according to the pressure of the cylinder 312. By moving to the center of the jig base 120, the tooth model can be automatically fixed to the tooth model. At this time, the pressure sensor 313 inside the cylinder 215 may measure the pressure inside the cylinder 312.

And, when the internal pressure of the cylinder 312 measured by the pressure sensor 313 exceeds the threshold value, the processor determines that the tooth model 130 is fixed and stops the operation of the cylinder 312, thereby supporting It is possible to prevent damage to the tooth model 130 by 311.

In addition, the supporters 311 are deformed in contact with the tooth model 130 according to the shape of the tooth model 130 as shown in step 320 of FIG. 3, so that the supporters 311 The tooth model 130 can be fixed more strongly.

4 is a flowchart illustrating a method of fixing a tooth model according to an embodiment of the present invention.

In step 410, the processor of the tooth model fixing device may drive the model sensor.

In step 420, the model sensor may measure whether the tooth model 130 is seated on the jig base 120. When the model sensor determines that the tooth model 130 is seated on the jig base 120, the processor may perform step 430. In addition, when the model sensor is not measured that the tooth model 130 is seated on the jig base 120, the model sensor may repeatedly perform step 420.

In step 430, the processor may request the fixing mechanism to move the plurality of supports 140 toward the tooth model 130. In this case, the fixing mechanism may push the cylinders connected to each of the supports 140 by a tube filled with liquid so that the supports 140 may move toward the tooth model 130 by hydraulic pressure.

In step 440, the processor may check whether the supports 140 moving in step 430 can continue to move. Specifically, the processor may measure the positions of each of the supports 140 using a position sensor. In addition, when the positions of the supports 140 are not changed in a state where hydraulic pressure due to the pressure of the cylinder is applied to the supports 140, the processor may determine that the supports 140 cannot move. At this time, the processor determines that the tooth model 130 is fixed and stops the operation of the cylinder applying hydraulic pressure to the supports 140, thereby increasing the hydraulic pressure applied to the supports 140 so that the supports 140 It is possible to prevent applying pressure enough to damage (130). Then, the processor may perform step 150.

In addition, when the positions of the supports 140 on the supports 140 are changed, the processor determines that the supports 140 can still move, and the step 430 until the supports 140 cannot move. Can be performed repeatedly.

In step 450, the processor may request the scanner 110 to scan.

The present invention can provide an apparatus and method capable of fixing a tooth model without a gum model (GUM) for fixing the tooth model by holding and fixing the tooth model with supports moving by hydraulic pressure.

At this time, since the present invention does not use a gum model for fixing the tooth model 100, the tooth model 100 is generated by the force applied to the tooth model 100 in the process of fixing the tooth model 100 to the gum model. It can prevent breakage.

In addition, the present invention applies pressure to the liquid filled in the tube to move the support to the tooth model, so that even if the cylinder continues to apply pressure while the support and the tooth model are in contact, the liquid filled in the tube is compressed, Only part of the applied pressure is applied to the tooth model 130 to prevent damage to the tooth model 130.

In addition, the present invention automatically recognizes that the patient's tooth model 100 is seated on the jig base 130, and automatically fixes the tooth model 100 according to the recognition result, thereby facilitating the tooth model 100 Can be fixed.

Implementations of the various techniques described herein may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or combinations thereof. Implementations include a data processing device, e.g., a programmable processor, a computer, or a computer program product, i.e. an information carrier, e.g., machine-readable storage, for processing by or controlling the operation of a number of computers. It can be implemented as a computer program recorded on an apparatus (computer-readable medium). Computer programs, such as the computer program(s) described above, may be recorded in any type of programming language including compiled or interpreted languages, and as a standalone program or in a module, component, subroutine, or computing environment. It can be deployed in any form, including as other units suitable for the use of. A computer program can be deployed to be processed on one computer or multiple computers at one site, or to be distributed across multiple sites and interconnected by a communication network.

Processors suitable for processing a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. In general, the processor will receive instructions and data from read-only memory or random access memory or both. Elements of the computer may include at least one processor that executes instructions and one or more memory devices that store instructions and data. In general, a computer may include one or more mass storage devices, such as magnetic, magnetic-optical disks, or optical disks, to store data, receive data from, transmit data to, or both It may be combined so as to be. Information carriers suitable for embodying computer program instructions and data are, for example, semiconductor memory devices, for example, magnetic media such as hard disks, floppy disks and magnetic tapes, Compact Disk Read Only Memory (CD-ROM). ), Optical Media such as DVD (Digital Video Disk), Magnetic-Optical Media such as Floptical Disk, ROM (Read Only Memory), RAM (RAM) , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), and the like. The processor and memory may be supplemented by or included in a special purpose logic circuit structure.

Further, the computer-readable medium may be any available medium that can be accessed by a computer, and may include a computer storage medium.

While this specification includes details of a number of specific implementations, these should not be construed as limiting to the scope of any invention or claim, but rather as a description of features that may be peculiar to a particular embodiment of a particular invention. It must be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination. Furthermore, although features operate in a particular combination and may initially be described as so claimed, one or more features from a claimed combination may in some cases be excluded from the combination, and the claimed combination may be a subcombination. Or sub-combination variations.

Likewise, although operations are depicted in the drawings in a specific order, it should not be understood that such operations must be performed in that particular order or sequential order shown, or that all illustrated operations must be performed in order to obtain a desired result. In certain cases, multitasking and parallel processing can be advantageous. In addition, separation of the various device components in the above-described embodiments should not be understood as requiring such separation in all embodiments, and the program components and devices described are generally integrated together into a single software product or packaged in multiple software products. You should understand that you can.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are only presented specific examples to aid understanding, and are not intended to limit the scope of the present invention. In addition to the embodiments disclosed herein, it is apparent to those of ordinary skill in the art that other modified examples based on the technical idea of the present invention may be implemented.

110: scanner
120: jig base
130: tooth model
140: supports

Claims (11)

A jig base on which a user's tooth model is mounted;
A fixing mechanism for fixing the tooth model by moving a plurality of supports to a position where the tooth model is seated using hydraulic pressure;
A position sensor measuring the positions of each of the supports; And
Processor for determining that the tooth model is fixed when the positions of the supports do not change while hydraulic pressure is applied to the supports
Tooth model fixing device comprising a. delete The method of claim 1,
The processor,
When it is determined that the tooth model is fixed, the tooth model fixing device stops the operation of the cylinder applying hydraulic pressure to the supports The method of claim 1,
A model sensor that measures whether the tooth model is seated on the jig base and the position of the tooth model seated on the jig base
Including more,
The fixing mechanism,
When the tooth model is seated on the jig base, the tooth model fixing device applies hydraulic pressure to the supports using a cylinder. The method of claim 1,
Each of the supports,
A tooth model fixing device made of an elastic material having an elasticity such that a portion in contact with the tooth model can be adaptively deformed according to the shape of the tooth model. A jig base on which a user's tooth model is mounted; And
Fixing mechanism for fixing the tooth model by moving a plurality of supports to the position where the tooth model is seated using hydraulic pressure
Including,
The fixing mechanism,
A tooth model fixing device configured to control a force applied to the tooth model by each of the supports according to the shape of the tooth model and the portion of the tooth model in contact with the supports. Measuring whether the user's tooth model is seated on the jig base using the model sensor; And
When the tooth model is seated on the jig base, fixing the tooth model by moving a plurality of supports to the position where the tooth model is seated using hydraulic pressure
Including,
The step of fixing the tooth model,
Measuring the positions of each of the supports using a position sensor; And
When the positions of the supports do not change while hydraulic pressure is applied to the supports, determining that the tooth model is fixed
Tooth model fixing method comprising a. delete The method of claim 7,
The step of fixing the tooth model,
When it is determined that the tooth model is fixed, stopping the operation of the cylinder applying hydraulic pressure to the supports
Tooth model fixing method further comprising The method of claim 7,
Each of the supports,
A method for fixing a tooth model, wherein a portion in contact with the tooth model is made of an elastic material having elasticity enough to be adaptively deformed according to the shape of the tooth model. Measuring whether the user's tooth model is seated on the jig base using the model sensor; And
When the tooth model is seated on the jig base, fixing the tooth model by moving a plurality of supports to the position where the tooth model is seated using hydraulic pressure
Including,
The step of fixing the tooth model,
A tooth model fixing method for controlling a force applied by each of the supports toward the tooth model according to a shape of the tooth model and a portion of the tooth model in contact with the supports.

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