JP6814516B2 - How to obtain dental restoration placement data for newly cutting a dental restoration in the uncut part of a CADCAM disc - Google Patents

Description

Provided is a method of placing dental restoration data for making a dental restoration with a CAM device using a CADCAM disc after cutting the dental restoration. In particular, the present invention relates to a method of obtaining dental restoration placement data so that a dental restoration can be efficiently cut when the cutting data is lost or the cutting history cannot be used because the CDCAM disk is cut by another system.

Dental restorations are made by cutting from CADCAM discs using a CADCAM system at a dental restoration factory. The CADCAM system for producing dental restorations uses a CAD system to design the shape of the dental restoration, places the dental restoration inside the CADCAM disc, and cuts the CADCAM disc with a CAM device for dental restoration. It is a system to get things. If the CADCAM disc has not been finally fired, there is also a system in which a dental restoration is obtained by firing after cutting with a CADCAM system.
Each manufacturer sells the CAD system and the CAM device as a set, and the system and the CAD data are often incompatible with other manufacturers.
In recent years, CAD systems have been released by many companies, and dental restoration factories have adopted multiple CADCAM systems. The dental restoration factory employs a plurality of CADCAM systems to efficiently produce dental restorations suitable for clinical cases. In some cases, the CADCAM disc may be cut leaving a portion where the dental restoration can be cut, which is not always efficient.
However, in order to improve efficiency, the dental restoration was sometimes cut again on the remaining part of the CADCAM disc on which the dental restoration was cut.

Further, depending on clinical cases and the order of producing dental restorations, it may be efficient to design with a CAD system different from the CAD system corresponding to the CAM system used for cutting. However, since the CAD data of each CAD system is not compatible, it is not possible to use the CAD data obtained by cutting the dental restoration first. As a result, the CAD system could not recognize the CAD data of the CADCAM disk obtained by cutting the dental restoration with another CAD system, and the data of the dental restoration could not be designed on the CADCAM disk.
Further, even with the same CAD system, the CAD data created in the past may be lost, or the past CAD data may not be available due to replacement of the CAD system. Even in such a case, there is a high demand for cutting a dental restoration from a cut CADCAM disc.
From this, even if the data cut in the past is lost, the cut CADCAM disc is used, and the dental restoration data to be cut is placed on the cutting CADCAM disc data used for the CAM device. There was a need for a method of obtaining object placement data.
Patent Documents 1 and 2 introduce a technique for cutting a dental restoration using a CADCAM system, but do not describe a technique for cutting a dental restoration again from a CADCAM disk on which the dental restoration has already been cut. ..

Special table 2004-520142 Re-table 2009/154301

A method capable of designing a dental restoration without using the CAD data already cut has been desired in a portion of the cut CADCAM disc that can cut the dental restoration. From the cut CADCAM disc, a method of reflecting the portion of the CADCAM disc that can cut the dental restoration on the CAD data has been desired. A method of cutting a dental restoration from a portion of a cut CADCAM disc that can cut the dental restoration has been desired.

In the present invention, in order to newly cut a dental restoration using a CAM device from an uncut portion of a CADCAM disc on which a dental restoration has already been cut, columnar CADCAM disc data used for cutting with the CAM device. It is a method to obtain the dental restoration placement data in which the dental restoration data to be cut is placed in.
(See FIG. 1) An imaging step of imaging image data (2) of a CADCAM disc (1) on which a dental restoration has already been cut.
(See FIG. 2) CADCAM disk image range data determination step of determining CADCAM disk image range data (3) from captured image data (2) of CADCAM disk.
(See FIG. 3) A process of determining the cut disk image range data (4) from the CADCAM disc image range data (3).
(See FIG. 4) Image range data correction step of correcting CADCAM disk image range data (3) and cut disk image range data (4) on CADCAM disk data (5) and making them correspond to each other.
(See FIG. 5) CADCAM disc data (5) is defined as a portion of the CADCAM disc image range data (3) corrected and matched on the CADCAM disc data (5), which is not the cut disk image range data (4). ) Is determined to be the uncut portion data (6) of the dental restoration or (see the corresponding part in FIG. 7) CADCAM disk data (5) corrected and corresponding to the CADCAM disk image range data. Dentistry that defines the part of the cut disk image range data (4) in (3) and determines the area other than the range from the top surface to the bottom surface of the CADCAM disc data (5) as the dental restoration uncut part data (6). Restoration uncut part data determination process,
(Refer to Fig. 6) Data of uncut portion of dental restoration (6) The data of the dental restoration to be cut (7) is determined inside and the data of the arrangement of the dental restoration (8) is obtained. This is a characteristic method for acquiring dental restoration placement data.
In the present invention, in order to newly cut a dental restoration using a CAM device from an uncut portion of a CADCAM disc on which a dental restoration has already been cut, columnar CADCAM disc data used for cutting with the CAM device. It is a program to obtain the dental restoration placement data in which the dental restoration data to be cut is placed in.
An imaging means that captures the image data of a CADCAM disc from which a dental restoration has already been cut, or a certification means that certifies the image data .
CADCAM disk image range data determining means for determining CADCAM disk image range data from the captured image data of the CADCAM disk,
A cutting disk image range data determining means for determining the cut disk image range data from the CADCAM disk image range data,
Image range data correction means for correcting and corresponding to CADCAM disc image range data and cut disk image range data on CADCAM disc data.
The part of the CADCAM disc image range data that has been corrected and matched on the CADCAM disc data and is not the cut disc image range data is defined, and the range from the top surface to the bottom surface of the CADCAM disc data is defined as the dental restoration uncut part data. Dental restoration uncut except for the range from the top surface to the bottom surface of the CADCAM disc data, which is within the CADCAM disc image range data determined or corrected on the CADCAM disc data and corresponding. Dental restoration to determine partial data Uncut partial data determination means,
A dental restorer placement data acquisition program characterized by undergoing a dental restorer placement data acquisition process that determines the dental restorer data to be cut inside the uncut portion data of the dental restorer and obtains the dental restorer placement data (8). is there.
In the program, each imaging process in the dental restoration placement data acquisition method, CADCAM disk image range data determination process, already cut disk image range data determination process, image range data correction process, dental restoration uncut part data determination process , Each of which is executed by an imaging means or a certification means for certifying image data , a CADCAM disk image range data determining means, a cut disk image range data determining means, an image range data correcting means, and a dental restoration uncut portion data determining means . ..

It is possible to design a dental restoration in a portion of the cut CADCAM disc where the dental restoration can be cut without using the CAD data already used for cutting. From the cut CADCAM disc, the part where the dental restoration of the CADCAM disc can be cut can be reflected on the CAD data. The dental restoration can be cut from the portion of the cut CADCAM disc that can cut the dental restoration.

A dental restoration is an inlay, onlay, crown, denture, bridge, or other tooth restoration used in dental treatment. Especially used for crown restoration.
The CADCAM disc includes resin-based and ceramic-based discs, and specifically, acrylic resin-based, silica-alumina-based, zirconia-based, and alumina-based discs. In particular, acrylic resin type and zirconia type are used.
The shape of the CADCAM disc is plate-shaped, 1-5 cm thick, and 25-225 cm ² discs are used. In particular, a substantially disk-shaped one is used. Since cutting is performed from the plate-shaped plane direction, the plane direction is the side where the cutting marks appear.
Cutting a CADCAM disk By designing data of a plurality of dental restorations in the cutting data, it is possible to obtain a plurality of dental restorations from one CADCAM disk.
The method of the present invention can be carried out using an arithmetic unit and can be a program. In that case, it is performed by an arithmetic unit having an input unit, a display unit, a storage unit, and an arithmetic unit. The arithmetic unit is mainly a computer. The arithmetic unit may be via the internetwork, and the program may also be implemented via the internetworking.

A CADCAM disc in which a dental restoration is cut is a CADCAM disc in which a dental restoration is cut using a CADCAM system, and a trace of the dental restoration being cut is made on a part of the CADCAM disc. To have. In particular, in the present invention, it means a CADCAM disc in which a dental restoration is not cut on the entire CADCAM disc, but a portion where a new dental restoration can be cut is left.
The uncut portion of the CADCAM disc on which the dental restoration has already been cut indicates that the dental restoration is a newly cut portion of the CADCAM disc on which the dental restoration can be cut.
Cutting a new dental restoration using a CAM device means cutting the dental restoration into a part where the dental restoration can be newly cut on the CADCAM disk from which the dental restoration has been cut, and as a cutting device. Perform with a CAM device. In order to cut with a CAM device, CAD data such as dental restoration placement data is required.
The dental restoration arrangement data used in the CAM device is data for cutting the dental restoration in the CAM device, and is used for cutting the CADCAM disc.

The dental restoration data to be cut is shape data capable of cutting a dental restoration, and is shape data for creating a dental restoration by cutting a CADCAM disc using the present invention for use in treatment.
Placing the dental restoration data to be cut in the CADCAM disk data used in the CAM device means arranging the shape data of the dental restoration to be cut using the present invention in the CADCAM disk data used in the CAM device. Not only does the shape data of the dental restoration not be placed other than the already cut part of the CADCAM disc data used in the CAM device, but also the width of the cutting material, which is the cutting tool, is taken into consideration when arranging between the dental restorations. It is an act to do.
The dental restoration placement data is included in the CADCAM disc data in order to obtain a dental restoration by cutting the dental restoration from the uncut part of the CADCAM disc even if the CADCAM disc in which the dental restoration has already been cut is used. In addition, the dental restoration data to be cut in the data part other than the data part where the dental restoration has already been cut, taking into account the width of the cutting material, at least between the dental restoration data and the dental restoration data It is the data that is arranged with the width of.

The image data is image data of a CADCAM disc on which a dental restoration has already been cut. Further, it is the image data of the CADCAM disc which is the whole picture of the CADCAM disc and at least shows the cutting marks. Furthermore, it is image data in which the already cut portion is shown as a shadow. It is preferable that the image data has these requirements. The image data needs to be captured in the plane direction of the CADCAM disc. It is preferable to take an image substantially parallel to the plane direction.
The entire CADCAM disc is the entire CADCAM disc, and an image with no missing parts is required. However, even if there is a part missing, there is no particular problem as long as the image can be grasped in its entirety.
At least the image showing the cutting marks means that there is a portion of the CADCAM disc in which the dental restoration has already been cut, and the cut portion is imaged. The CADCAM disc is cut from the plane direction, which is the wide surface direction, and the cutting marks are present in the wide surface direction. It is desirable that all the cutting marks are imaged, but even if some parts are missing, there is no particular problem as long as the cutting marks can be grasped.
More specifically, the image data showing the cutting marks is the already-cut shadow image data, which is the image data in which the already cut portion is shown as a shadow.
The image data in which the already cut portion is shown as a shadow is the image data of the imaging in which the cutting marks are represented. It is not enough that the cutting marks are simply represented, and it is necessary that the entire cutting marks are shown and that the cut parts are imaged to the extent that they can be recognized from the image. If it is insufficient, it is necessary to take a picture again, but it is also possible to add an additional part cut by drawing or the like.
The purpose of the imaging process is to acquire image data. The image data may be an image obtained by an imager, and a plane image, a stereoscopic image, a moving image, and the like are exemplified, and a plane image is preferable. Moreover, it is preferable that it is a digital image. There are also two-color images, color images, and the like, and two-color images are preferable. The imager is represented by a camera, a 2D scanner, a 3D scanner, a video, and the like. Cameras and 2D scanners are preferred.

Hereinafter, each step will be described in the order shown in the drawings.
These imaging and confirmation steps are performed in FIG. 1-3.
FIG. 1 shows an imaging process, in which a CADCAM disc 1 on which a dental restoration has already been cut is imaged to obtain image data 2. Specifically, it is obtained as a digital photographic image. In the invention of the program, the image data is certified in the arithmetic unit on which the program operates. The certification method includes that the arithmetic unit has an image pickup function and may take an image, inputting the data as data from the outside, and selecting image data 2 from the input data.
FIG. 2 shows the CADCAM disc image range data determination process, and the CADCAM disk image range data (3) is determined from the captured image data (2) of the CADCAM disk. In FIG. 2, the CADCAM disk image range data (3) in the image data (2) is certified. The certification of the CADCAM disk image range data (3) may be automatically calculated. You can also manually certify.
After confirming the image data (2), confirm whether the CADCAM disk image range data (3) is correctly certified, proceed to the next if it is correctly certified, and if it is not correctly certified, proceed to the CADCAM disk image range data (CDCAM disk image range data (3). If the certification of 3) is performed again and it is confirmed that the appropriate CADCAM disk image range data (3) is certified, the next step is performed. If the CADCAM disk image range data (3) cannot be certified, the image data (2) will be recreated. This is the kind of alcoholism in the program.

FIG. 3 shows the process of determining the image range data of the cut disk, and determines the image range data (4) of the cut disk from the CADCAM disk image range data (3). In FIG. 3, the cut disk image range data (4) in the CADCAM disk image range data (3) is certified.
After confirming the CADCAM disc image range data (3), check whether the already-cut disc image range data (4) is correctly certified, and if it is correctly certified, proceed to the next step. If not, it is already cut. The disc image range data (4) is certified again. If it can be confirmed that the appropriate cut disk image range data (4) has been certified, the next step is performed. If the cut disk image range data (4) cannot be certified, the CADCAM disk image range data (3) will be recreated. This is the kind of alcoholism in the program.

In the steps of FIGS. 4 and 5, the uncut portion of the CADCAM disc is determined from the image data.
FIG. 4 shows the image range data correction step, in which the CADCAM disk image range data (3) and the cut disk image range data (4) are transformed onto the CADCAM disk data (5) to correspond to each other.
Since the CADCAM disk data (5) is the data to be cut by the CAM device, it is 3D data, and when the CADCAM disk image range data (3) and the cut disk image range data (4) are two-dimensional, the CADCAM disk data. Correspond to the bottom surface or top surface of (5).
Here, the case where it corresponds to the top surface is described. The top surface of the CADCAM disc data (5) is certified, and the CADCAM disc image range data (3) is superimposed and corrected on the top surface of the certified CADCAM disc data (5). The cut disk image range data (4) is corrected according to the corrected CADCAM disk image range data (3). The certified CADCAM disc is aligned with the top surface of the certified CADCAM disc data (5), the corrected CADCAM disc image range data (3), and the coordinate axes of the corrected cut disk image range data (4). The corrected cut disk image range data (4) is represented and associated on the top surface of the data (5).
As a result, the corrected cut disk image range data (4) is recorded on the top surface of the certified CADCAM disk data (5).
FIG. 5 shows the process of determining the uncut portion data of the dental restoration, which is within the CADCAM disc image range data (3) corrected and corresponded to the top surface of the CADCAM disc data (5), and is a cut disk image. A part that is not the range data (4) (dental restoration uncut part plane data (6') on the top surface of the CADCAM disk data (5)) is determined.
This means that the cut CADCAM disk (1) obtained by imaging the image data (2), and the dental restoration uncut partial plane data (6'), which is a range in which the dental restoration can be cut, is converted into the CADCAM disk data. It can be shown on the top surface of (5).
Next, the dental restoration uncut portion plane data (6'), which is the range in which the dental restoration can be cut, is the dental restoration uncut portion data (6'), and the vertical range from the top surface to the bottom surface of the CADCAM disk data (5) is the dental restoration uncut portion data ( 6) is decided.
More specifically, all the points of the dental restoration uncut partial plane data (6') shown on the top surface of the CADCAM disk data (5) are placed on the top surface or the bottom surface in the CADCAM disk data (5). The space in the CADCAM disk data (5) obtained by vertically moving the dental restoration uncut portion plane data (6') into 3D is determined as the dental restoration uncut portion data (6).

The following method can be considered as another correspondence of the part of FIG. 5, and any method may be used.
It is within the CADCAM disk image range data (3) corrected and made to correspond to the top surface of the CADCAM disk data (5), and all the points of the cut disk image range data (4) are converted to the CADCAM disk data (5). Inside, it is moved vertically to the top surface or the bottom surface, and the cut disk image range data (4) is determined to be the cut disk image range 3D data (4') in the CADCAM disc data (5) converted into 3D.
A portion of the CADCAM disc data (5) that is not the cut disc image range 3D data (4') is determined and determined to be the dental restoration uncut portion data (6).

In FIG. 6, the process of acquiring the dental restoration arrangement data is shown, and the dental restoration arrangement data (8) is set by defining the dental restoration data (7) to be cut inside the dental restoration uncut portion data (6). obtain.
The obtained dental restoration uncut portion data (6) shows a portion where the dental restoration can be cut on the CADCAM disk (1) in which the dental restoration has already been cut, and the dental restoration can be formed in this range. it can.
The shape of the dental restoration to be cut is designed using CAD, and the dental restoration data (7) to be cut is prepared. The dental restoration arrangement data (8) is arranged so that the dental restoration data (7) to be cut, which is prepared in the range of the uncut portion data (6) of the dental restoration, can be cut by the CAM device.
When arranging the dental restoration data (7) to be cut in the uncut portion data (6) of the dental restoration, it is necessary to arrange it so that it can be cut by the CAM device. Normally, a dedicated CAD system is used to arrange the dental restoration data (7) to be cut. When arranging the dental restoration data (7) to be cut, it is necessary to take into consideration the width of the cutting material which is the cutting tool used in the CAM device.

In order to make the position where the CADCAM disk (1) is mounted on the CAM device constant, if there is a positioning unit, the positioning unit is also imaged in the imaging step (FIG. 1), and the CADCAM disk image range data determination step ( In FIG. 2), it is confirmed that the positioning unit is imaged, and in the image range data correction step (FIG. 4), the CADCAM disk data (5) having the positioning unit is used, and the CADCAM disk image is used. When the range data (3) is corrected and made to correspond to the CADCAM disk data (5), it is necessary to align the positioning portions.
Dental restoration placement data can be obtained by sequentially going through the steps of FIGS. 1, 2, 3, 4, 5, and 6.
These certifications may be automatically calculated using an arithmetic unit, or may be manually certified.

Even if the data cut in the past is lost in the CADCAM disk from which the dental restoration has been cut, the dental restoration placement data for cutting the CADCAM disk with the part where the dental restoration can be cut remains efficient. You can get it well.

Image diagram obtained by shooting a CADCAM disc and obtaining image data Image diagram that certifies the range of CADCAM disk image data in the image data Image diagram that certifies the cut disk image range data in the CADCAM disk image data By using the CADCAM disc image data and the cut disc image range data to correct and correspond to the cut disc image range data on the CADCAM disc data, the dental restoration is cut in the CADCAM disc data. Image diagram with certified image data The dental restoration is cut by defining the part that is not the cut disc image range data using the CADCAM disc image data and the cut disc image range data and certifying the range from the top surface to the bottom surface of the CADCAM disc data (5). Image of certifying uncut part data of dental restoration of CADCAM disk that has not been done Image diagram of the dental restoration data to be cut placed in the range of the uncut part data of the dental restoration Block diagram of the method of the present invention

1 CADCAM disk 2 Image data (for example, photographic image)
3 CADCAM disk image range data 4 Already cut disk image range data 5 CADCAM disk data 6 Dental restoration uncut part data 7 Dental restoration data to be cut 8 Dental restoration placement data

Claims (2)

In order to newly cut the dental restoration using the CAM device from the uncut part of the CADCAM disc on which the dental restoration has already been cut, it is planned to cut into the columnar CADCAM disc data used for cutting with the CAM device. It is a method to obtain the dental restoration placement data in which the dental restoration data is placed.
Imaging process to capture image data of a CADCAM disc from which a dental restoration has already been cut,
CADCAM disc image range data determination process, which determines CADCAM disc image range data from the image data of the captured CADCAM disk,
Cutting disk image range data determination process, which determines the cut disk image range data from the CADCAM disk image range data,
Image range data correction process that corrects the CADCAM disc image range data and the cut disk image range data on the CADCAM disc data and makes them correspond to each other.
The part of the CADCAM disc image range data that has been corrected and matched on the CADCAM disc data and is not the cut disc image range data is defined, and the range from the top surface to the bottom surface of the CADCAM disc data is defined as the dental restoration uncut part data. Dental restoration uncut except for the range from the top surface to the bottom surface of the CADCAM disc data, which is within the CADCAM disc image range data determined or corrected on the CADCAM disc data and corresponding. Dental restoration to be determined as partial data Uncut partial data determination process,
A method for acquiring dental restoration placement data, which comprises undergoing a dental restoration placement data acquisition process in which dental restoration data to be cut is determined inside the dental restoration uncut portion data and dental restoration placement data is obtained. In order to newly cut the dental restoration using the CAM device from the uncut part of the CADCAM disc on which the dental restoration has already been cut, it is planned to cut into the columnar CADCAM disc data used for cutting with the CAM device. It is a program to obtain the dental restoration placement data in which the dental restoration data is placed.
An imaging means that captures the image data of a CADCAM disc from which a dental restoration has already been cut, or a certification means that certifies the image data.
CADCAM disk image range data determination means for determining CADCAM disk image range data from image data of an imaged or certified CADCAM disk,
A cutting disk image range data determining means for determining the cut disk image range data from the CADCAM disk image range data,
Image range data correction means for correcting and corresponding to CADCAM disc image range data and cut disk image range data on CADCAM disc data.
The part of the CADCAM disc image range data that has been corrected and matched on the CADCAM disc data and is not the cut disc image range data is defined, and the range from the top surface to the bottom surface of the CADCAM disc data is defined as the dental restoration uncut part data. Dental restoration uncut except for the range from the top surface to the bottom surface of the CADCAM disc data, which is within the CADCAM disc image range data determined or corrected on the CADCAM disc data and corresponding. Dental restoration to determine partial data Uncut partial data determination means,
Dental restoration arrangement data acquisition characterized by executing the dental restoration arrangement data acquisition means by the arithmetic device to determine the dental restoration arrangement data to be cut inside the dental restoration uncut part data and obtain the dental restoration arrangement data. program.

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