KR102178836B1 - Method for determining the center of rotation of a tooth model and method for manufacturing a transparent correction device using the same - Google Patents

Abstract

The configuration of the present invention is a patient's tooth model;
A tooth to be moved in the patient's tooth model;
A reference axis set to determine a center of rotation of the tooth to be moved of the patient;
An extension line of the reference axis of the tooth to be moved;
A reference axis set on a tooth to be completed to be moved to a completed position for completing a desired tooth by moving the tooth to be moved of the patient;
An extension line of the reference axis of the tooth to be completed;
A rotation center point where the extension line of the reference axis of the tooth to be moved and the extension line of the reference axis of the tooth to be completed meet;
Determining a virtual tooth model of a patient using a rotational center axis, characterized in that the virtual tooth model is completed by dividing the tooth to be moved into two or more steps to move the tooth to be moved to the tooth to be completed among the tooth model of the patient around the rotation center It's about how to do it.

Description

Method for determining the center of rotation of a tooth model and method for manufacturing a transparent correction device using the same}

The present invention relates to a method of determining the center of rotation of a corrected tooth model.

It also relates to a method of manufacturing a transparent correction device using this.

The present invention relates to a method of determining an orthodontic tooth model that can be efficiently corrected in correcting a patient's teeth through this.

As the background technology of the invention, first, through analog diagnosis, a gypsum model of the human body's teeth is made, and the teeth are separated with a saw based on the baseline for the teeth, and the separated teeth are moved little by little to a desirable tooth shape. It consists in manufacturing a transparent orthodontic device by constructing a tooth model that has been attached and moved. Several sets of orthodontic diagnostic setup were performed by moving the teeth in a preferred direction from their original position and attaching them.

This configuration made it difficult to accurately calculate the movement of the patient's teeth, and caused unnecessary pain to the patient by relying on the dentist's individual tendency and manual work.

Since the technician cut and moved the tooth by hand, it was difficult to calculate the exact distance and angle of movement.

Therefore, the prior art, which was invented by recognizing this problem, also has the following problems.

In order to alleviate such inconvenience, the second advanced technology has the advantage of being able to move the tooth at a precise distance and angle because it is moved using a computer.

However, even in such a work using a computer, the rotation center point is predetermined, so that rotation and tooth movement cannot be performed at the same time, and there have been disadvantages along with the time required to move in the desired direction through individual rotation and tooth movement.

In other words, it cannot reproduce the movement accompanied by rotation.

It will be described with reference to Figures 1 to 4 as follows.

As described above, in the process of manufacturing the patient's tooth model, the tooth movement of the tooth 100 to be moved can only be rotated or moved, and the tooth movement accompanied by rotation was impossible.

As shown in FIGS. 1 to 4, first, in the step of moving the tooth body, the teeth 110 and 120 in motion and the tooth 100 to be moved in the patient's tooth model are rotated to produce an orthodontic tooth model corresponding to the tooth 130 to be completed. Is to do.

In the prior art, it took a lot of time to manufacture a corrected tooth model due to this configuration.

In addition, when the patient's tooth to be moved is actually moved, the tooth body is moved at the same time as the rotation. In the case of manufacturing a tooth correction device different from the actual tooth movement, or if the tooth body is moved at the same time as the rotation, a separate work is required. However, due to this, there has been a problem in establishing an ideal treatment plan for the patient's teeth, as it is not possible to perform elaborate work.

In other words, it took a lot of time and cost to manufacture an orthodontic tooth model because the workers had to move the teeth one by one and perform separate work step by step to manufacture a transparent brace.

As a work of manufacturing an orthodontic tooth model in the current prior art, tooth movement can only reproduce rotational movement or simple movement, and movement accompanying rotation cannot be reproduced.

In order to move the teeth in order to create an orthodontic tooth model, if you follow the conventional method, you must rotate first, move the tooth (tooth body movement), or move the tooth (called tooth body movement) first, and then rotate it. Is to do.

Referring to Figure 5 as follows.

Fig. 5 is a diagram showing that a rotation center point is determined in advance as a prior art using a computer.

The prior art will be described in more detail through a flow chart as follows.

It will be described with reference to Fig. 6A.

Load patient scan data (S1)

Set the plane of the dentition and arch with the patient's scan data (S2)

Then, a virtual base is produced with the patient's scan data in front (S3).

After making the virtual base, unnecessary parts of the virtual base are cut out and the radius is set (S4).

Set the boundaries of the maxilla and mandible and analyze the dentition (S5)

Calculate the length of the dental arch and determine the ideal arch (S6)

Analyze the dentition and move each tooth to the ideal position by rotational movement and tooth movement according to the ideally determined arch (S7).

When you click each tooth, the rotation center axis for the X, Y, and Z axes is already set.

Subsequently, it will be described with reference to FIG. 6B.

Rotate and move the tooth along the X-axis (S10)

It is determined whether it is an ideal position on the X plane (S20).

If it is not an ideal position on the X plane, the toothed body and rotation are repeated (S21).

In this way, it repeats continuously until it reaches the ideal position on the X plane (S22).

Then, it repeats until it becomes the ideal position on the Y plane again (S23).

After that, it tries repeatedly until it becomes the ideal position on the Z plane again.

In the case of the ideal position on the X plane in step S20, the tooth is rotated and moved along the Y axis. (S30)

Next, check whether it is an ideal position on the Y plane (S40).

Of course, if it is not the ideal position on the Y plane, it will try repeatedly until it reaches the ideal position.

In the case of an ideal position, rotate and move the teeth along the Z axis (S50)

It is determined whether it is an ideal position on the Z plane (S60)

Of course, if it is not the ideal position on the Z plane, try repeatedly until the ideal position is reached.

When one tooth is completed in an ideal position, the above-described operation is continued with respect to the other tooth to be moved (S70).

After applying to all the teeth to be moved, the setup is completed (S80).

As you can see, it repeats infinitely after checking whether it is the same plane endlessly.

In general, no matter how skilled a person can perform rotational movement and tooth movement with a computer program, the teeth must be corrected in a three-dimensional space in each plane, so the time is repeated several times while moving to the X, Y, and Z planes. And costly.

Also, the exact center of rotation cannot be known, so the force and moment cannot be accurately calculated.

The orthodontist knows vaguely through a lot of experience, and therefore, using an attachment device to the tooth in the form of a wire, he observes the movement of the tooth each time and estimates the moment or force of the force and corrects it to a desirable tooth. will be.

In this way, problems such as pain and time consuming due to trial and error occur to the patient.

Due to this problem, the transparent orthodontic device did not function properly and the treatment time was increased.

The prior art has a disadvantage in that it takes a lot of time to design a brace because the rotation center point is fixed, and the exact rotation moment and force cannot be known, and thus, it is not possible to provide a corrective device suitable for the patient.

As described above, in the past, three movement center axes are defined for each tooth based on the x, y, and z planes.

In order to move the tooth, it was rotated around the rotational center point based on this movement center axis, so it was possible to place the tooth in the desired place repeatedly, such as rotation movement-tooth movement, rotation movement-tooth movement, etc.

However, if the present invention knows the location of the first and last teeth and rotates around the actual center of rotation, the teeth can be moved to the desired position, so the setup is completed faster.

The flow according to the existing tooth analysis is as follows.

1. Analyzing problems and establishing treatment plans using information such as patient's tooth model, X-RAY, and photos. At this stage, virtual base preparation is performed.

2. Scan the patient's teeth as a virtual file that can move in 3D.

The root length and the axis of rotation of the tooth are determined by dividing each model tooth at this stage through model segmentation.

3. Choose the ideal arch.

4. Click the tooth to move.

5. Rotation moves based on the rotation center point set in advance based on the X, Y, and Z axes.

The digital setup process, which is actually a process of rotating movement, is described below.

When a tooth is clicked, the center of rotation is determined based on the final arrangement position of the tooth in the x plane.

It performs rotational movement and tooth movement in the X plane based on the specified rotational center.

The center of rotation is determined based on the final arrangement position in the Y plane.

Separate rotational movement and tooth movement in the Y plane based on the determined rotational center.

The center of rotation is determined based on the final arrangement position in the Z plane.

Rotational movement and tooth movement are performed based on the specified rotational center point.

6. Complete Virtual set up.

In addition, the actual tooth movement does not move as in the prior art, and rotation and movement must proceed simultaneously.

Therefore, even if the entire treatment plan is made, it takes a lot of time and effort to make a transparent orthodontic device by moving the teeth one by one for the actual tooth movement.

In order to move the tooth, it was rotated only based on this movement center point, so it was possible to position the tooth in a desired position by repeating the rotation movement-tooth movement, rotation movement-tooth movement repeatedly.

However, in the present invention, if the position of the first and last teeth is known and rotated around the actual rotation center, the tooth can be moved to a desired position, so that the setup is completed faster.

Korean Intellectual Property Office Patent Registration No. 10-1518709 (2015.05.15) Korean Intellectual Property Office Patent Registration No. 10-1518711 (2015.05.15)

The first object is to shorten the time in determining the correction to move the tooth model to be corrected to the desired tooth model.

The second object of the present invention is to determine the center of rotation of the present invention and move with rotation. It is possible to easily reproduce the actual tooth movement of the tooth to be corrected by determining the orthodontic tooth model. There is this.

In order to solve the above problems, a method of determining a patient's corrected tooth model using a rotation center point is configured as follows.

As the first embodiment, the following method is constructed.

Patient's tooth model;

Teeth to be moved in the patient's tooth model;

A reference axis set to determine a center of rotation of the tooth to be moved of the patient;

An extension line set by extending the reference axis of the tooth to be moved;

A reference axis set on a tooth to be completed to be moved to a completed position for completing a desired tooth by moving the tooth to be moved of the patient;

An extension line set by extending the reference axis of the tooth to be completed;

A rotation center point where the extension line of the reference axis of the tooth to be moved and the extension line of the reference axis of the tooth to be completed meet;

By dividing the tooth to be moved into two or more steps to move the tooth to be moved to the tooth to be completed among the patient's tooth model around the rotation center point, complete the orthodontic tooth model to complete the orthodontic tooth model of the patient using the rotation center point. It's the way you decide.

Here, the above-described problem is solved through a method of manufacturing a transparent orthodontic device using each of the two or more steps of the orthodontic tooth model.

After obtaining the rotation center point, a further step of obtaining the rotation moment is provided to solve the problem.

As the second embodiment, the following method is used.

Obtaining tooth information of the patient;

Converting a tooth obtained from the obtained tooth information of a patient into a virtual file that can be moved in 3D;

Determining a rotation center of a tooth to be moved in the converted virtual file;

Moving a tooth based on the determined center of rotation and placing it in an ideal position;

Dividing the step of arranging at the ideal position in the tooth to be moved of the patient into two or more steps to obtain tooth model information to be corrected by the patient;

Having a method of obtaining corrected tooth model information.

It has a method of manufacturing a transparent orthodontic device using each of the two or more steps of the corrective tooth model obtained here.

After obtaining the rotation center point, a step of obtaining a rotation moment is further added to obtain information on a tooth model to be corrected.

The first effect is the process of moving along with rotation by determining the rotational center point of the present invention, and it is effective to manufacture an accurate orthodontic device for the patient because the actual tooth movement of the tooth to be corrected can be easily reproduced by determining the orthodontic tooth model. .

As work becomes more efficient, rotation and tooth movement are performed at the same time, which is faster than the existing processing speed.

The second effect is that you need to know the exact center of rotation to accurately calculate the force and moment, so that there is a very great advantage in manufacturing or designing an accurate correction device.

In the prior art, it was difficult to find the exact center of rotation easily, so based on the experience of the technician, the teeth were moved while adjusting the rotation moment and force on the teeth using a bracket.

In the present invention, since the center of rotation can be easily found, and the ratio of the force and the rotation moment accordingly can be accurately calculated, there is an effect that the desired movement can be accurately obtained when a force is applied.

That is, it is possible to make an orthodontic device according to the center of rotation of the tooth by analyzing the exact rotation moment and force.

If the center of rotation can be set, the actual tooth movement can be reproduced on the set-up and has reproducibility.

The third effect is that it took a long time to move the teeth with three movement centers and tooth body movements for all 28 upper and lower teeth, but the rotation center can be changed in the same way as in the real world, so the working time is at least 1/2 or less. It is drastically reduced.

1 is a diagram showing a tooth model to be corrected using information on a patient's teeth to be corrected.
2 is a diagram showing a method of moving a tooth model to be corrected by a conventional technique.
3 is a diagram showing how to rotate the tooth to be corrected after the tooth movement of FIG. 2.
FIG. 4 is a diagram showing that the tooth to be corrected in FIG. 3 is rotated to determine a tooth correction model at a desired position.
FIG. 5 is a view showing that the rotation center point is fixed as a cause of movement from FIGS. 1 to 4.
6a and 6b are flowcharts showing a process of determining a calibration model on a conventional computer.
7 is a diagram showing an extension line after determining a reference axis of a tooth model to be corrected.
Fig. 8 is a diagram in which the reference axis of the ideal tooth model is determined and the center of rotation is obtained with an extension line.
FIG. 9 is a diagram showing a tooth model corresponding to an ideal position in a tooth model to be corrected according to the first embodiment, divided into a plurality of steps to be moved.
Fig. 10 relates to a second embodiment.
11 is a diagram showing various determination of the rotation center point around the rotation axis.
12 is a flowchart showing the process of determining the calibration model of the present invention.
Fig. 13a is a diagram showing that the central point is located at 1/3 of the gum when the force of F is applied to the crown.
FIG. 13B is a diagram specifically illustrating FIG. 13A.
Fig. 14 is a diagram showing the application of a rotational moment counterclockwise to direct the rotational center point toward the root.
Fig. 15 is a diagram showing that the center of rotation is on the crown and a rotational moment is applied so that the root appears to move.
Fig. 16 is a diagram showing that the center of rotation is at the root.

The details of the specific implementation will be described with reference to the diagram.

The first embodiment will be described with reference to FIGS. 7 to 9.

Patient's tooth model (10)

Tooth 100 to be moved among the patient's tooth model 10

A reference axis 142 set to determine a center of rotation of the patient's teeth 100 to be moved;

An extension line 144 set by extending the reference axis of the tooth to be moved;

A reference axis 152 set on a tooth to be completed to move to a completed position for completing a desired tooth by moving the tooth to be moved 100 of the patient;

An extension line 154 set by extending the reference axis of the tooth to be completed;

A rotation center point 160 where the extension line 144 of the reference axis of the tooth to be moved and the extension line 154 of the reference axis of the tooth to be completed meet;

The tooth model to be moved is divided into two or more steps to move the tooth to be moved to the tooth 130 to be completed among the patient's tooth model 10 with the rotation center point 160 as the center to obtain information to complete the orthodontic tooth model. It relates to a method for determining a patient's corrected tooth model using the rotation center point 160, characterized in that.

After finding the rotation center point, a step of finding the rotation moment is further performed.

When the rotation center point is obtained, the exact rotation moment is obtained accordingly.

The time required to determine the calibration model by this method of determination is effective in reducing at least 1/2 of the time determined by the conventional FIGS. 1 to 6.

It corresponds to a decision method that is useful for manufacturing an accurate calibration device as well as rapid diagnosis process.

This decision will actually move the patient's teeth to be corrected.

The actual tooth movement path is to rotate around the center of rotation.

According to the orthodontic tooth model as described above, two or more steps are formed to manufacture a transparent orthodontic device corresponding to each step, so that the patient can correct the patient's teeth within a certain time period by attaching and detaching the transparent orthodontic device of several steps to the tooth.

The second embodiment will be described with reference to Fig. 10 as follows.

It has a step (S100) of obtaining the patient's tooth information.

A step (S200) of converting the teeth obtained from the obtained tooth information of the patient into a virtual file that can be moved in 3D is performed.

A step (S300) of determining a rotational center point of a tooth to be moved in the converted virtual file is performed.

It has a step (S400) of moving the tooth based on the determined rotational center point and placing it in an ideal position.

A step (S500) of dividing the step of arranging at the ideal position of the patient's tooth to be moved into two or more steps to obtain information on a tooth model to be corrected by the patient (S500).

In this way, a method of manufacturing a transparent orthodontic device is constructed by acquiring the corrected tooth model information.

It has a method of manufacturing a transparent orthodontic device using each of the two or more steps of the obtained corrected tooth model.

After obtaining the rotation center point, a step of obtaining a rotation moment is further provided to obtain information on a tooth model to be corrected of the patient.

In order to compare with the present invention, a conventional tooth analysis will be described in the background art.

The flow according to the existing tooth analysis is as follows.

1. Analyzing problems and establishing treatment plans using information such as patient's tooth model, X-RAY, and photos. In this step, virtual base preparation is performed.

2. Scan the patient's teeth as a virtual file that can move in 3D.

At this stage through model segmentation, the root length and the axis of rotation of the tooth are determined by dividing each model tooth.

3. Choose the ideal arch.

4. Click the tooth to move.

5. Rotate and move based on the predetermined rotation center based on the X, Y, and Z axes.

The digital setup process, which is the actual rotational movement process, is described below.

When a tooth is clicked, the center of rotation is determined based on the final arrangement position of the tooth in the X plane.

Of course, it constantly checks whether it is an ideal position on the X plane.

It performs rotational movement and tooth movement in the X plane based on the specified rotational center.

The center of rotation is determined based on the final arrangement position in the Y plane.

Of course, it constantly checks whether it is an ideal position in the Y plane.

Rotation and tooth movement are performed in the Y plane based on the specified rotation center.

The rotation center is determined based on the final arrangement position in the Z plane.

Of course, it constantly checks whether it is an ideal position on the Z plane.

Perform rotational movement and tooth movement based on the specified rotational center.

6. Complete Virtual set up.

Analysis of the tooth to be developed in the present invention is as follows.

Steps 1, 4, and 6 are the same as conventional tooth analysis.

The fifth step invented by the present invention

Determine the rotation center point of the selected tooth. Move the tooth based on the rotation center point and place it in an ideal position.

In fact, tooth movement rotates around the tooth, rotates around the root point (non-adjustable tilt shift), and sometimes shifts around the end of the crown (teeth head) (root movement).

Here, the shape of tooth movement varies depending on the force F applied to the tooth and the magnitude of the rotational moment pushing the tooth counterclockwise.

Depending on the ratio of the rotational moment and force, the rotational center point is changed and the tooth movement is changed.

Orthodontic treatment is to change the force and moment to move the tooth in the desired direction, but it is difficult to make an accurate orthodontic device because the current digital technology does not reflect the process that reflects the force and can only see the result. .

There are only three companies in the world that have developed prior art programs.

Also, like most applicants, a transparent correction device using real 3D printers

Since there is no program company, it is not aware of the problem of the irrationality of the work.

Since the applicant has been continuously working on the transparent orthodontic device using such a program, the present invention was realized by realizing that the actual tooth movement process differs from the digital design process.

11 is a view showing that the rotation center point can be determined around the rotation axis for the transparent correction device of the present invention.

If you look at 12 degrees, it is as follows.

Steps S10 to S80 in the present invention are the same as steps S1 to S8 of the background technology.

The description of this is replaced with the description in the background art.

In the next step, when the tooth is clicked, the rotation center axis of the current tooth in the X plane and the final arrangement of the desired teeth in the X plane are determined, and the rotation center point is determined as the point where the rotation center axes meet each other (S100).

In the step S100, the final arrangement of teeth is determined and the rotation center point is determined at a point where the rotation center axes meet each other, including the following three steps.

The first step is to determine the current center of rotation of the tooth on the X-axis in the above case and draw an extension line.

The second step is to determine the rotational center axis of the tooth to be moved in a desired state on the X axis and draw an extension line.

The final step is to determine the intersection point as the center of rotation.

The Y-axis and Z-axis steps have similar steps.

The rotation and tooth body are simultaneously rotated and moved around the rotation center point in the X plane based on the specified rotation center point (S200).

The rotation center axis of the current tooth in the Y plane and the desired final arrangement of the teeth in the Y plane are determined, and the rotation center point is determined as the point where the rotation center axes meet each other (S300).

The rotation and tooth body are simultaneously rotated and moved around the rotation center point in the Y plane based on the specified rotation center (S400).

The rotation center axis of the current tooth in the Z plane and the final arrangement of the teeth desirable in the Z plane are determined, and the rotation center point is determined as the point where the rotation center axes meet each other (S500).

The rotation and tooth body are simultaneously rotated and moved around the rotation center point in the Z plane based on the specified rotation center (S600).

It moves to the tooth to be rotated or moved and repeats the above steps.

The rotation center axis is determined according to the condition of the teeth, so the rotation center point has been determined, and the rotation movement and the tooth movement are sequentially separated from the central axis at the current position of the patient's teeth.

A feature of the present invention is that the time is shortened by allowing the tooth movement to be achieved simultaneously with the rotational movement by using the point where the extension line of the central axis at the desired position of the patient's teeth meets as the rotational center point.

In addition, the teeth of the human body must be treated so that tooth movement occurs simultaneously with rotational movement.

Figures 13a and 13b are non-adjustable biblical movements, and when a force of F is applied to the teeth, a point at 1/3 of the length of the tooth at the root and gum becomes the rotation center and rotates.

When there is no additional moment to control the rotation center point, it is called an unadjustable biblical motion.

This center of rotation is called the center of resistance.

Fig. 14 shows the application of the rotational moment M in the counterclockwise direction.

If a rotational moment is applied to the gum, the center of resistance changes toward the apical end, and the larger the rotational moment, the further the rotational center is, which can be changed to tooth movement.

If the rotational moment is greater than the force applied from the left side, the root rotates when it reaches a certain ratio (12:1) or more.

The center of rotation moves toward the crown. This is called root movement.

Fig. 15 is a diagram showing that the crown is rotated to the center of rotation.

Figure 16 is a diagram showing the rotation of the root to the center of rotation.

It can be seen that the center of rotation is a very important factor in order to move the patient's teeth to the desired position of the teeth.

The center of rotation is also set as the center of resistance that is 1/3 of the distance between the root and the gum, which is the center of resistance.

In addition, when the preferred tooth movement is to set the crown side as the rotational center point or the apical end in the opposite direction as the rotational center point, the ratio of the rotational moment and force is determined, so that the strength of the orthodontic device or the orthodontic device can be accurately manufactured.

The reason why it is important to know the center of rotation is that you need to know the center of rotation to accurately design a device that can give a rotation moment.

The definitions for the words used in the present invention are as follows.

1. About forces and moments

Depending on the diagnosis result, depending on whether the tooth is adjustable, non-adjustable inclined movement or root movement, a dentist or a place that specializes in manufacturing transparent orthodontic devices must accurately determine the force and moment for the tooth to be moved. .

In other words, since it is easy to know where the rotation center of the tooth is to be rotated during the diagnosis process, not only the diagnosis process is accelerated, but also the strength of the diagnosis process is accelerated by making the device according to the ratio of the force and the moment, or attaching the orthodontic device to the dentist. It is possible to accurately calculate the and moment ratio.

2. About the Adjustment Bible Saidong

As shown in the figure, a rotation moment is applied in a counterclockwise direction when pressing the front part of the gum and pressing the part of the back cut, so if an F force is applied and a counterclockwise rotation moment is applied, the center of resistance is located at 1/3 of the upper gum in the length of the root. (It is determined probabilistically by the medical community.)

As the force of the rotational moment increases, the center of rotation moves toward the apical end, and as the rotational moment increases, the rotational center becomes farther and can be changed to tooth movement. (Pure backward movement)

Then, when the counterclockwise rotation moment is much larger than F (12:1 or more), the root rotates. (Centering on the crown side) This is called root movement.

The center of rotation is the tip of the root of the tooth, and a rotation moment in the counterclockwise direction is applied together.

At this time, the ratio of the force F and the rotational moment M corresponds to 1:8~1:10.

3. About the Uncontrolled Bible Saidong

When force is applied to the tooth, it rotates around the root of the tooth, that is, 1/3 of the gum, and this center of rotation is called the center of resistance.

When you apply force to the tooth, it rotates clockwise.

In this case, if a rotational moment is applied in a counterclockwise direction using a straightener, the center of rotation changes toward the apical end.

4. Root movement

If the rotation moment in the counterclockwise direction is given very strong, the root rotates around the end of the crown.

This is the case when the ratio of the force F and the rotational moment M is 1:112 or more.

The terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventor may appropriately define the concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is.

Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention. It should be understood that there may be various equivalents and variations.

10: patient's tooth model 100: tooth to be moved 110, 120: tooth in motion 130: tooth to be completed 142: reference axis of tooth to be moved
144,154: reference axis extension line 152: reference axis of the tooth to be completed 160: rotation center point
170: resistance center 200: gum
M: rotational moment F: force

Claims (6)

A tooth model obtaining step of obtaining a tooth model by obtaining tooth information of the patient;
It is possible to move the tooth obtained by the obtained tooth information of the patient in 3D
Converting to a virtual file;
Setting a reference axis to determine a rotational center point so that tooth movement and rotational movement to be moved of the patient can be simultaneously performed in the converted virtual file;
Setting extension lines (144,154) by extending the reference axis of the tooth to be moved;
Moving a tooth to be moved of the patient to set a reference axis 152 on a tooth to be completed to be moved to a completed position for completing a desired tooth;
Setting a rotation center point 160 where the extension line of the reference axis of the tooth to be moved and the extension line of the reference axis of the tooth to be completed meet;
By dividing the tooth to be moved into two or more steps to move the tooth to be moved to the tooth 130 to be completed, among the tooth model of the patient centering on the rotation center point, to obtain information to complete the orthodontic tooth model to simultaneously implement tooth rotation with the tooth body. Method for determining the center of rotation of the corrected tooth model, characterized in that the set to. The method of claim 1, further comprising the step of obtaining a rotation moment after obtaining the rotation center point. A method of manufacturing a transparent orthodontic device manufactured using the method of determining the rotational center point of the corrected tooth model of claim 1.
















Obtaining tooth information of the patient;
It is possible to move the tooth obtained by the obtained tooth information of the patient in 3D
Converting to a virtual file;
Determining a center of rotation of a tooth to be moved and rotated in the converted virtual file;
Move the tooth based on the determined center of rotation and place it in an ideal position
Step to do;
Two steps of placing in the ideal position on the patient's tooth to be moved
A method for obtaining orthodontic tooth model information, comprising: obtaining information on a tooth model to be corrected of the patient by dividing it into the above steps. Calling the patient's scan data (S10);
Setting the plane of the dentition and arch with the patient's scan data (S20);
Creating a virtual base (S30);
Cutting out unnecessary portions of the virtual base and setting a radius (S40);
Demarcation of the maxilla and mandible and analyzing the dentition (S50);
Calculating the length of the dental arch and determining the ideal arch (S60);
Moving each tooth to an ideal position by rotational movement and tooth movement according to the predetermined arch (S70);
Clicking each tooth to determine a rotation axis for the X, Y, and Z axes (S80);
When the tooth is clicked, determining the current central axis of the tooth and the final arrangement position of the teeth in the X plane, and determining a rotation center point based on a point where the rotation center axes meet each other (S100);
Rotating and moving teeth in the X plane based on the determined rotation center point (S200);
Determining a rotational center axis of the current tooth in the Y plane and a final arrangement of the desired teeth in the Y plane, and determining a rotational center point as a point where the rotational center axes meet each other (S300);
Rotating and moving the tooth body around the rotation center point in the Y plane based on the determined rotation center (S400);
Determining a rotation center axis of the current tooth in the Z plane and a final arrangement of the teeth desired in the Z plane, and determining a rotation center point as a point where the rotation center axes meet each other (S500);
A method of obtaining corrected tooth model information, comprising the step (S600) of simultaneously rotating and moving the tooth body around the rotation center point in the Z plane based on the determined rotation center. A method of manufacturing a transparent orthodontic device manufactured by using the method of obtaining corrected tooth model information of claim 4 or 5.

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