KR20160004863A - The virtual set-up method for the orthodontics procedure - Google Patents

Abstract

The present invention relates to a method for performing a simulation procedure for orthodontic treatment, and more particularly, to a 3D tooth model generated by minimizing actual data and an error rate, and a variety of guides for simulating a dental procedure, By providing a UI that is subdivided by a two-dimensional manipulation in comparison with the existing existing three-dimensional manipulation UI (User interface), a user can perform more precise manipulation, thereby performing tooth movement similar to the process of actual correction, The present invention relates to a method of simulating an operation of a tooth for orthodontic treatment.
According to the present invention, it is possible to provide a simulation method for performing accurate manipulation by a simple operation using a tooth model that minimizes the actual data and error rate, and provides various types of guides, And provides a simulation method for realizing the analytical information on the intraoral elements such as the jaws and the amount of change in the tooth movement which is changed according to the tooth movement of the patient by carrying out a simulation operation in the dental procedure .

Description

[0001] The present invention relates to a virtual orthodontic method for orthodontic treatment,

The present invention relates to a method of performing a simulation procedure for a dental orthodontic procedure, and more particularly, to a method of performing a dental orthodontic operation using a 3D tooth model generated by minimizing actual data and error rate, By providing a UI that is finely divided by a two-dimensional manipulation compared to a conventional 3D manipulation user interface (UI), which is difficult, the user can perform more precise manipulation with more convenience, and by performing tooth movement similar to the actual calibration process, The present invention relates to a method of simulating a denture orthodontic treatment.

In the existing simulation, the 3D manipulation method is a three-dimensional manipulation on a two-dimensional screen viewed by a computer monitor, allowing a user to move with a sense of space in the viewpoint of the user, There is a problem that it is difficult to operate.

In addition, the tooth model used in the conventional simulation was divided into two categories: a tooth model created by dividing individual teeth after creating a 3D CAD model using a gypsum model manufactured from the oral cavity of a patient, , Tooth model generated by segmenting the tooth parts in each tomographic image using the head tomographic image data (DICOM series) generated by CT, etc., and collecting them into one.

Since the former is based on a gypsum model, it is not possible to know the contents necessary for the diagnosis such as root information, so there is a problem that the diagnostic data must be referred to with the separate diagnosis data using the X-ray imaging. Information can be obtained. However, since the human body is exposed to X-rays, it is impossible to use an X-ray dose exceeding a predetermined intensity, so that data of low resolution is obtained. This causes errors in the selection operation for creating a tooth model The problem is that In using some electronic tooth models, there is a way to generate and provide root information by receiving user's input, but this also can not avoid the problem of generating errors with actual data.

In addition, there was a possibility of an error because the simulation was performed only by the clinical experience of the physician without a guide which is a standard guide for the orthodontic treatment, and the amount of change in the tooth movement which is changed by the movement of the tooth due to the simulation and the oral cavity inside the jaw bone There is a problem in that the analysis information on the elements can not be grasped in real time.

KR 10-1099732 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a simulation method for performing accurate manipulation by a simple operation using a tooth model that minimizes actual data and error rate .

In addition, various types of guides are provided to perform accurate simulations and user's convenience, and simulated procedures are performed in dental procedures, and the amount of change in teeth movement, which is changed according to a patient's tooth movement, The present invention provides a simulation method for analyzing analysis information of a patient in real time.

According to an aspect of the present invention, there is provided a method of simulating a dental prosthesis,

A method of simulating a dental correction procedure, comprising: combining at least one 3D tooth crown model extracted from a 3D mouth surface model with one or more 3D tooth volume models extracted from a 3D head image to generate one or more 3D tooth models; ; A guide that can be applied to the generated 3D tooth models is provided as a 3D view on one side of the screen, three different views are displayed as three fixed views excluding the one side, A second step provided as a frontal view, a side view and a tooth mastic face view; And a third step of confirming the guide through the provided 3D view, confirming the position between the tooth models, selecting a tooth to be simulated, and performing a calibration simulation operation by being operated through the three fixed views ; .

A 3D view provided on one side of the screen during the second step, the guide providing a reference for simulated procedures or simulations; a 3D oral surface model; a clipped 3D head image; or a 3D diagnostic and analysis One or more of the data may be selected and used together.

Wherein the fixed view selected and operated in the third step is a combination of the teeth displayed in the other two views and the 3D tooth model displayed in the 3D view by the operation of any one of the three fixed views selected at the same time It can be applied to move.

A 3D view, one of the views provided as a 3D view, a front view, a side view, or a authoring face view, in which the teeth are selected and manipulated by the user during the second step, is the positional relationship between the selected tooth and the surrounding teeth, Represented as a 3D view providing relationship information; The remaining three frontal views, side views, or authoring plane views other than the 3D view can be reconstructed by 3D conversion by collecting the two-dimensional transformations performed in each corresponding fixed view.

A method for simulating a tooth for orthodontic treatment, wherein a tooth selected by a user is changed in real time according to a state of transformation of a tooth, the landmarks displayed on a 3D head image or a measurement using the tooth, And the changed marking points or measured values using the changed marking points are reflected on the 3D view screen to provide a change in anatomical state analysis of the patient in real time.

According to the present invention, it is possible to provide a simulation treatment method that enables precise operation by a simple operation compared with the prior art, and provides various types of guides to provide accurate simulation treatment and user convenience, The present invention provides a simulation method for realizing the analysis of information about the internal elements of the oral cavity such as the jaw and the amount of change of the tooth movement which is changed according to the tooth movement of the patient.

FIG. 1 is a view showing a 3D tooth crown model which is a part of a dog individual tooth extracted from a 3D mouth surface model and a 3D tooth volume model including a root part of a tooth extracted from a 3D head image, Drawings showing tooth model
2 is a view showing a process of expressing a simulated procedure user interface as a 3D view and three views composed of a front face, a side face, and a masticating face, and performing a calibration simulation operation
Fig. 3 is a drawing showing that a simulation procedure is performed using a 3D mouth surface model as a guide
FIG. 4 is a view showing that a clipping 3D head image is used as a guide to perform a simulation operation
5 shows an example of the fact that the marking points displayed on the 3D head image or the measurement values using the marking points are changed in real time according to the changed tooth position and the movement distance, rotation direction, and rotation angle of the teeth can be confirmed during the tooth movement simulation operation drawing

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

FIG. 1 is a view showing an example of an image of a tooth including a root portion of a tooth extracted from a 3D tooth crown model 10 and a 3D head image, which are parts of a dog individual tooth identified from the 3D Stone Model, 3 is a view showing a 3D tooth model (30) used in a simulation in which a 3D tooth volume model is combined.

In order to correct the patient's teeth, a 3D scanner (3D Scanner) is used to scan the gypsum model obtained from the patient's mouth, or a patient is scanned by inserting an intra-oral 3D scanner or the like, (3D Stone Model) can be created directly. Alternatively, in the case where a scanning device such as a 3D scanner or an intra-oral 3D scanner is not provided, CT (computed tomography) or MRI (3D) stone model can be obtained indirectly by magnetic resonance imaging (MRI) imaging, segmentation and reconstruction.

Data for 3D landmark-transform (3D landmark-transform), which will be described later, is prepared by marking 3D surface landmarks on the 3D stone model obtained in various manners. For example, marking points can be displayed on both frontal, midrange, molar, and the like.

On the other hand, head tomographic image data (DICOMseries) can be acquired from equipment such as CT, MRI, and ultrasonic diagnostics. Acquisition of head tomographic image data (DICOMseries) is not limited to PET but may be performed using poisitron emission tomography Tomography), and the like.

Thereafter, a 3D head image having a volume is generated by combining the acquired head tomogram data (DICOMseries), and a 3D head image corresponding to a 3D point image corresponding to a mark point displayed on a 3D mouth model (3D Stone Model) 3D landmark-based matching (coordinate alignment using 3D marking points, 3D landmark-transform) is performed by displaying marking points on 3D head image (3D Volume Landmarks). This matches the 3D Stone Model to the 3D Head Image. That is, rotation, translation, and the like are performed based on the mark point to register the mark. This gives you a 3D Stone Model that is matched to the 3D Head Image.

Then, a Tooth-crown carving and a Tooth-Crown surface were extracted from a 3D stone model matched to a 3D head image. (3D Tooth Volume Model) including the tooth root is extracted from the 3D head image, and the 3D tooth crown model (10) is extracted after each Tooth Region Volume Clipping and Create Tooth Volumes. , The 3D Tooth Crown Model) and the 3D Tooth Volume Model (20, 3D Tooth Volume Model). At this time, the coordinate system is shared (Shared Local Coordinates) so that the 3D tooth crown model 10 and the 3D tooth volume model 20 are synchronized. (3, 3D Tooth Model). Hereinafter, 3D tooth models (30) generated through the above-described processes can be used for simulation for simulation of a tooth correction.

FIG. 2 is a view illustrating a process of expressing a virtual set-up user interface as a 3D view and three manipulation views composed of a front face, a side face, and a mending face, and performing a calibration simulation operation. FIG. 3 is a view showing that a simulation procedure is performed using a 3D Stone Model as a guide. FIG. FIG. 4 is a view showing that clipping (3D Head Image) is used as a guide to perform simulation. FIG. 5 is a graph showing the relationship between a landmark displayed on a 3D head image or measurement values using the landmark in real time according to a changed tooth position, The direction of rotation, the angle of rotation, and the like can be confirmed.

Referring to FIG. 2, in the Virtual Set-up User Interface, four synchronized fields of view (view, view and view can be used in combination) are provided. At this time, the left side of the screen is a view in which a combination of the above-described 3D tooth models 30 is visualized, and is provided as a 3D view. At this time, the teeth 40 selected by the user are displayed on the right side (view) consisting of a frontal view, a lateral view, and an occlusal view.

There has been a problem in that a precise operation is inconvenient for the user to perform the simulated procedure because the simulated operation has conventionally provided a three-dimensional manipulation UI that is difficult to precisely manipulate on the two-dimensional monitor screen. In order to overcome such a problem, a user interface (GUI) is used in which a three-dimensional manipulation is divided into a plurality of two-dimensional manipulations, User Interface). In addition, various types of guides are provided for accurate simulation and user convenience. At this time, if the tooth structure arrangement is constituted by only a combination of the 3D tooth models (30, 3D tooth models) without a guide, there is no standard in the orthodontic treatment, so that there is a disadvantage that only the clinical experience of the user is required to perform the simulation. In addition, since the user implements a calibration simulation by setting an arbitrary criterion, the actual calibration and error may be large.

Accordingly, various sets of guides indicating the shape of the entire oral cavity in which the teeth are placed are used (virtual set-up guidance), so that the degree of movement and degree of deformation of the teeth can be applied within the oral structure of the patient. Here, the guide may be a 3D Stone Model as shown in Fig. 3, or a clipped 3D Head Image as shown in Fig. 4, In addition, various applications such as visualization of changes in measured values used in 3D diagnosis and 3D analysis according to the movement of teeth between simulations can be performed. Here, when a 3D stone model is used as a guide, when a clipped 3D head image is used as a guide or when 3D diagnosis and 3D analysis is performed The teeth 40 to be selected by the user in any of the cases of using the used measurement values and to be changed through the simulation procedure are provided as three views on the right side of the screen.

 At this time, the three views are provided as a frontal view, a lateral view, and an occlusal view, applying the two-dimensional translation rotation transformation for each view to the currently selected tooth model, Dimensional transformation is performed through a combination of two-dimensional transformation. Therefore, the tooth arrangement after the tooth structure is deformed by the correction can be predicted, and as shown in FIG. 5, The angle of rotation, etc. are displayed on the screen as numerical values. In other words, the teeth selected by the user are changed in real time according to the tooth movement by using the landmarks displayed on the 3D head image or measurement values using the 3D head image during the tooth movement simulation operation, And visualized to provide information about the patient's anatomical state change.

As a result, in the past, a simulation operation depending only on the clinical experience of the physician has been performed. However, the above-described guide to the simulation operation is solved, and compared with the conventional 3D manipulation UI which is difficult to precisely manipulate By providing a UI (User interface) segmented by the above-described two-dimensional manipulation, the user can more precisely manipulate more conveniently.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

10: 3D tooth crown model 20: 3D tooth volume model
30: 3D tooth model 40: 3D tooth model selected for simulation
50: Movement of a 3D tooth model

Claims (5)

As a simulation method for orthodontic treatment,
A first step of combining at least one 3D tooth crown model extracted from a 3D mouth surface model and at least one 3D tooth volume model extracted from a 3D head image to generate at least one 3D tooth model;
A guide that can be applied to the generated 3D tooth models is provided as a 3D view on one side of the screen, three different views are displayed as three fixed views excluding the one side, A second step provided as a frontal view, a side view and a tooth mastic face view; And
A third step of confirming a guide through the provided 3D view, confirming a position between teeth models, selecting a tooth to be simulated, and performing a calibration simulation operation by operating the three fixed views;
Wherein the method comprises the steps of: The method according to claim 1,
A 3D view provided to one side of the screen during the second step,
The guide provides criteria for simulated procedures or simulations,
Wherein the at least one of the 3D mouth surface model, the 3D mouth surface model, the clipped 3D head image, or the 3D diagnostic and analyzed data can be selected and used together. The method according to claim 1,
The fixed view, which is selected and operated in the third step,
Wherein the teeth displayed in the other two views and the 3D tooth model displayed in the 3D view are simultaneously moved by manipulation in any one of the fixed views selected from the three views. Simulation method. The method according to claim 1,
A 3D view, one of the views provided as a 3D view, a front view, a side view, or a authoring face view, in which the teeth are selected and manipulated by the user during the second step,
A 3D view providing positional relationship between the selected tooth and surrounding teeth and positional relationship with the guide;
The remaining three frontal views, side views, or authoring side views, other than the 3D view,
Dimensional transformation performed in each corresponding fixed view is collected and reconstructed by a 3D transformation to provide a simulation procedure for the orthodontic treatment. As a simulation method for orthodontic treatment,
The tooth selected by the user,
The landmarks displayed on the 3D head image or the measurements using the landmarks are changed in real time according to the state of transformation of the teeth,
Wherein the modified marking point or measurement values using the modified marking point are reflected on a 3D view screen to provide a change in anatomical state analysis of the patient in real time.

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