WO2022085090A1

WO2022085090A1 - Aligning program, aligning method, and information processing device

Info

Publication number: WO2022085090A1
Application number: PCT/JP2020/039459
Authority: WO
Inventors: 克成半沢; 知宏 ▲高▼梨; 伸護石塚
Original assignee: 富士通株式会社
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2022-04-28
Also published as: JPWO2022085090A1; JP7469709B2

Abstract

The present invention reduces the amount of time required for scanning work.　A storage unit (11) stores alignment reference information (11a) in which the positional relationship between a first marker (model base (15b)) added to an upper jaw model (15) and a second marker (model base (16b)) added to a lower jaw model (16) is defined. A processing unit (12) acquires scan data (17) obtained by scanning the upper jaw model (15) and scan data (18) obtained by scanning the lower jaw model (16), and determines the positional relationship between the scan data (17) and the scan data (18) on the basis of a first marker region (17a) contained in the scan data (17), a second marker region (18a) contained in the scan data (18), and the alignment reference information (11a).

Description

Alignment program, alignment method and information processing equipment

The present invention relates to an alignment program, an alignment method, and an information processing apparatus.

In recent years, CAD (Computer Aided Design) / CAM (Computer Aided Manufacturing) technology has been used in dentistry to improve the efficiency of treatment and technical work (see, for example, Patent Documents 1 to 4).

In dentistry, CAD technology is used, for example, when designing prostheses such as inlays, crowns, bridges, dentures, and implants. When designing such a prosthesis, first, a dental technician (hereinafter referred to as a technician) includes a dentition based on the impression (dental pattern) in the oral cavity of the patient collected by a dentist or a dental hygienist. Make a model of the upper and lower jaws. Then, the produced model is converted into scan data (three-dimensional data) by a three-dimensional scanner, and a prosthesis is designed using the scan data on a computer.

The maxilla and the mandible are occluded because the prosthesis provided on one tooth of the maxilla and the mandible does not interfere with the other tooth of the maxilla and the mandible by CAD technology. (Occlusion state) is reproduced on CAD. For example, in the past, the scan data of the upper and lower jaw models in the occlusal state, which were acquired separately from the scan data of the maxilla model and the mandible model, were aligned by matching the scan data of the maxilla model and the mandible model. , The occlusal state was reproduced. In addition, the scan data of the model of the base tooth (abutment tooth) such as the crown and the bridge may be aligned with the scan data of the jaw model.

Japanese Patent Publication No. 2020-526304 Special Table 2016-528020 Japanese Unexamined Patent Publication No. 2009-101124 Special Table 2020-520269 Gazette

However, with the conventional method, there is a problem that the scanning work takes time because the scan data for alignment must be prepared separately from the scan data of the maxillary model and the mandibular model.

In one aspect, it is an object of the present invention to provide an alignment program, an alignment method, and an information processing apparatus capable of shortening the time required for scanning work.

In one embodiment, an alignment program is provided. The alignment program is a first scan data obtained by scanning the upper jaw model to which the first marker portion is attached, and a second scan obtained by scanning the lower jaw model to which the second marker portion is attached. The data is acquired, and the area of the first marker part included in the first scan data, the area of the second marker part included in the second scan data, the first marker part, and the second marker. A computer is made to execute a process of determining the positional relationship between the first scan data and the second scan data based on the positioning reference information that defines the positional relationship of the unit.

Also in one embodiment, an alignment method is provided.
In one embodiment, an information processing device is provided.

In one aspect, the invention can reduce the time required for scanning operations.
The above and other objects, features and advantages of the invention will be apparent by the following description in connection with the accompanying drawings representing preferred embodiments of the invention.

It is a figure which shows an example of the alignment method and the information processing apparatus of 1st Embodiment. It is a block diagram which shows the hardware example of an information processing apparatus. It is a figure which shows an example of the generation method of the positioning reference information. It is a figure which shows an example of preparation of a maxillary model and a mandibular model. It is a flowchart which shows the flow of an example of the alignment process. It is a figure which shows the acquisition example of the scan data. It is a figure which shows the alignment example of each scan data. It is a figure which shows the output example of the alignment result. It is a figure which shows an example of the 3D model which deleted the area of a marker part. This is the first example of scan data for alignment. This is the second example of scan data for alignment.

Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings.
(First Embodiment)
FIG. 1 is a diagram showing an example of an alignment method and an information processing apparatus according to the first embodiment.

The information processing apparatus 10 of the first embodiment aligns the scan data 17 of the maxillary model 15 and the scan data 18 of the mandibular model 16.
The information processing device 10 has a storage unit 11 and a processing unit 12.

The storage unit 11 is a volatile storage device such as a RAM (Random Access Memory) or a non-volatile storage device such as an HDD (Hard Disk Drive) or a flash memory.
The storage unit 11 stores the positioning reference information 11a and the three-dimensional model 11b which is the alignment result.

The positioning reference information 11a is information that defines the positional relationship between the marker portion added to the upper jaw model 15 and the marker portion added to the lower jaw model 16. In the following, as an example of the marker unit, a model table 15b on which the main body 15a of the upper jaw model 15 is installed and a model table 16b on which the main body 16a of the lower jaw model 16 is installed will be described, but the marker unit is limited to this. It is not something that will be done. The marker portion may be, for example, a mark having three predetermined shapes (for example, a triangle) added to a fixed position of the main body 15a of the upper jaw model 15 or the main body 16a of the lower jaw model 16.

The positioning reference information 11a is, for example, scan data obtained by scanning an area including two model stands fixed to a positioning jig (see FIG. 3 described later), and is stored in the storage unit 11 in advance. The above two model stands correspond to the model stands 15b and 16b, and for example, the shapes and sizes are the same as those of the model stands 15b and 16b. In the area of the two model stands in the positioning reference information 11a, for example, the facing surfaces (the surfaces to which the

main bodies

15a and 16a are bonded) are parallel and the distance between the surfaces is 50.0 mm, which is an appropriate positional relationship. ing.

The three-dimensional model 11b shows the alignment result of the scan data, and reproduces, for example, the occlusal state of the maxillary model 15 and the mandibular model 16.
The processing unit 12 is realized by a processor which is hardware such as a CPU (Central Processing Unit) and a DSP (Digital Signal Processor). However, the processing unit 12 may include an electronic circuit for a specific purpose such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). The processor executes a program stored in a memory such as RAM. For example, an alignment program is executed. A set of a plurality of processors may be referred to as a "multiprocessor" or simply a "processor".

The processing unit 12 acquires scan data 17 and 18 obtained by scanning each of the maxillary model 15 and the mandibular model 16 from, for example, the three-dimensional scanner 12a. The processing unit 12 may acquire (receive) the scan data 17 and 18 from other information processing devices and storage devices (not shown) via the network. The processing unit 12 may store the acquired scan data 17 and 18 in the storage unit 11.

The main body 15a of the maxillary model 15 and the main body 16a of the mandibular model 16 are manufactured for each patient or case, for example. Further, the

main bodies

15a and 16a have a thickness and a model base 15b so that the positional relationship of the model stands 15b and 16b matches the positional relationship of the regions 11a1 and 11a2 in the positioning reference information 11a when the

main body

15a and 16a are put into an occlusal state by the user. , 16b and the fixed position may be adjusted. An example of this adjustment method will be described in the second embodiment described later.

In the example of FIG. 1, the mandibular model 16 is an abutment tooth removal model from which the abutment tooth model has been removed. Therefore, the processing unit 12 may acquire the scan data of the abutment tooth model and align it with the scan data of the maxillary model 15 or the mandibular model 16 (abutment tooth extraction model). Will be described in the second embodiment described later.

Then, the processing unit 12 determines the scan data 17 and 18 based on the area 17a of the model table 15b included in the scan data 17, the area 18a of the model table 16b included in the scan data 18, and the positioning reference information 11a. Determine the positional relationship.

When the positioning reference information 11a is scan data obtained by scanning an area including two model stands fixed to the positioning jig, alignment is performed as shown in FIG. That is, the area 11a1 of one model table in the positioning reference information 11a and the area 17a of the model table 15b included in the scan data 17 are aligned. The alignment is performed, for example, so that the shapes of the regions 11a1 and the regions 17a match. When the three marks for alignment are added to the model table 15b, the alignment is performed so that the three marks included in each of the regions 11a1 and 17a match. The same applies to the alignment of the area 11a2 of the other model table in the positioning reference information 11a and the area 18a of the model table 16b included in the scan data 18.

In FIG. 1, as a result of the alignment, the occlusal state of the maxillary model 15 and the mandibular model 16 is reproduced by the three-dimensional model 11b. In the

main bodies

15a and 16a, the thickness and the fixed position with the model bases 15b and 16b are set so that the positional relationship of the model bases 15b and 16b in the occlusal state matches the positional relationship of the model bases 15b and 16b in the positioning reference information 11a. If adjusted, the occlusal state is reproduced.

The processing unit 12 may store the three-dimensional model 11b in the storage unit 11 and output it to the outside of the information processing device 10. For example, the processing unit 12 may output and display the three-dimensional model 11b on the display device 12b connected to the information processing device 10.

As described above, in the alignment method and the information processing apparatus 10 of the first embodiment, the processing unit 12 acquires scan data 17 and 18 obtained by scanning the maxillary model 15 and the mandibular model 16, respectively. Then, the processing unit 12 receives the scan data 17 and based on the positioning reference information 11a that defines the positional relationship between the

regions

17a and 18a of the model tables 15b and 16b included in the scan data 17 and 18 and the model tables 15b and 16b. The positional relationship of 18 is determined. As a result, alignment is performed without preparing scan data for alignment (for example, scan data of the upper and lower jaw models in the occlusal state) separately from the scan data 17 and 18 of the maxillary model 15 and the mandibular model 16, respectively. It becomes possible. Therefore, the time required for scanning work can be shortened.

(Second embodiment)
Next, a second embodiment will be described.
FIG. 2 is a block diagram showing a hardware example of the information processing apparatus.

The information processing apparatus 20 includes a CPU 21, a RAM 22, an HDD 23, an image signal processing unit 24, an input signal processing unit 25, a medium reader 26, and a communication interface 27. The above unit is connected to the bus.

The CPU 21 is a processor including an arithmetic circuit that executes a program instruction. The CPU 21 loads at least a part of the programs and data stored in the HDD 23 into the RAM 22 and executes the program. The CPU 21 may include a plurality of processor cores, the information processing device 20 may include a plurality of processors, and the processes described below may be executed in parallel using the plurality of processors or processor cores. .. Further, a set of a plurality of processors (multiprocessor) may be referred to as a "processor".

The RAM 22 is a volatile semiconductor memory that temporarily stores a program executed by the CPU 21 and data used by the CPU 21 for calculation. The information processing apparatus 20 may include a type of memory other than the RAM, or may include a plurality of memories.

The HDD 23 is a non-volatile storage device that stores software programs such as an OS (Operating System), middleware, and application software, and data. The program includes, for example, an alignment program for causing the information processing apparatus 20 to align scan data of the upper jaw model and the lower jaw model. The data includes, for example, the positioning reference information 11a described above. The information processing device 20 may be provided with other types of storage devices such as a flash memory and an SSD (Solid State Drive), or may be provided with a plurality of non-volatile storage devices.

The image signal processing unit 24 outputs an image to the display 24a connected to the information processing device 20 according to a command from the CPU 21. As the display 24a, a CRT (Cathode RayTube) display, a liquid crystal display (LCD: Liquid Crystal Display), a plasma display (PDP: Plasma Display Panel), an organic EL (OEL: Organic Electro-Luminescence) display, or the like can be used. ..

The input signal processing unit 25 acquires an input signal from the input device 25a and the three-dimensional scanner 25b connected to the information processing device 20, and outputs the input signal to the CPU 21. As the input device 25a, a pointing device such as a mouse, a touch panel, a touch pad, a trackball, a keyboard, a remote controller, a button switch, or the like can be used. Further, a plurality of types of input devices may be connected to the information processing device 20.

The medium reader 26 is a reading device that reads programs and data recorded on the recording medium 26a. As the recording medium 26a, for example, a magnetic disk, an optical disk, a magneto-optical disk (MO: Magneto-Optical disk), a semiconductor memory, or the like can be used. The magnetic disk includes a flexible disk (FD: Flexible Disk) and an HDD. Optical discs include CDs (Compact Discs) and DVDs (Digital Versatile Discs).

The medium reader 26 copies, for example, a program or data read from the recording medium 26a to another recording medium such as the RAM 22 or the HDD 23. The read program is executed by, for example, the CPU 21. The recording medium 26a may be a portable recording medium and may be used for distribution of programs and data. Further, the recording medium 26a and the HDD 23 may be referred to as a computer-readable recording medium.

The communication interface 27 is an interface that is connected to the network 27a and communicates with other information processing devices via the network 27a. The communication interface 27 may be a wired communication interface connected to a communication device such as a switch by a cable, or may be a wireless communication interface connected to a base station by a wireless link.

(Method of generating positioning reference information)
Hereinafter, an example of the method for generating the positioning reference information 11a described in the first embodiment will be described.

FIG. 3 is a diagram showing an example of a method of generating positioning reference information.
The positioning reference information 11a is obtained, for example, by scanning the area 33 including the model bases 31 and 32 fixed to the positioning jig 30 with a three-dimensional scanner as shown in FIG.

The model stands 31 and 32 are fixed by the positioning jig 30 so that the facing surfaces are parallel to each other. Further, the positioning jig 30 can adjust the distance between the facing surfaces of the model tables 31 and 32. The distance between the faces is, for example, 50.0 mm. The regions 11a1 and 11a2 corresponding to the model stands 31 and 32 included in the positioning reference information 11a are the regions of the marker portion used for the alignment.

The positioning reference information 11a is stored in advance in the HDD 23 or the like, which is an example of the storage unit 11 shown in FIG. The user may create the positioning reference information 11a by the above method using the three-dimensional scanner 25b.

(Preparation of maxillary model and mandibular model)
FIG. 4 is a diagram showing an example of preparation of a maxillary model and a mandibular model.
First, for example, the main body 40 of the maxillary model and the main body 41 of the mandibular model are manufactured using gypsum for each patient or case. The abutment tooth model may be incorporated in the main body 40 of the upper jaw model or the main body 41 of the lower jaw model. The abutment tooth model can be removed from the

main bodies

40 and 41. In the following example, it is assumed that the abutment tooth model is incorporated in the main body 41 of the mandibular model, but the abutment tooth model may be incorporated in the main body 40 of the maxillary model.

The positioning jig 30 can be separated into a portion where the model base 35 is installed and a portion where the model base 36 is installed. The user adheres and fixes the main body 41 of the mandibular model to, for example, the model table 36 in a state where both portions are separated. After that, the user puts the main body 40 of the upper jaw model before adhering to the model base 31 on the main body 41 of the lower jaw model, and brings the

main bodies

40 and 41 into the desired alignment state (occlusal state) of the user. In that state, the user presses the adhesive surface of the model base 35 installed on the positioning jig 30 against the upper part of the main body 40 of the maxillary model to adhere them. As a result, the bonding position (fixed position) between the

main bodies

40 and 41 and the model bases 35 and 36 reflects the occlusal state.

If the distance between the facing surfaces of the model bases 35 and 36 is different from the distance between the surfaces of the model bases 31 and 32 in the positioning reference information 11a, the distance is set before the main body 40 is adhered to the model base 35. Gypsum is added on the main body 40 so as to be the same, and the thickness of the main body 40 is adjusted.

In this way, the

main bodies

40 and 41 have the same positional relationship with the regions 11a1 and 11a2 in the positioning reference information 11a so that the positional relationship between the model tables 35 and 36 when the user's desired occlusal state is obtained is the same as the model table. The fixed position or thickness with 35, 36 is adjusted.

After that, the main body 40 of the upper jaw model installed (glued) on the model stand 35 and the main body 41 of the lower jaw model installed (glued) on the model stand 36 are removed from the positioning jig 30. Further, the abutment tooth model incorporated in the main body 41 of the mandibular model is removed from the main body 41 and installed (bonded) on another model stand.

(Flow of alignment process)
FIG. 5 is a flowchart showing the flow of an example of the alignment process. The process of FIG. 5 is performed by the CPU 21 shown in FIG. 2 executing the alignment program.

First, the CPU 21 acquires scan data obtained by scanning various models prepared as described above from, for example, a three-dimensional scanner 25b (step S10).
FIG. 6 is a diagram showing an example of acquiring scan data.

In the example of FIG. 6, the maxillary model (model stand 35 and the main body 40 installed on it), the mandibular model without abutment teeth (model stand 36 and the main body 41a installed on it), and the abutment tooth model (model stand 37 and its installation). The main body 41b) is the scan target.

Scan data 50 is obtained by scanning the upper jaw model with the three-dimensional scanner 25b, scan data 51 is obtained by scanning the lower jaw model without abutment teeth, and scan data 52 is obtained by scanning the abutment tooth model. Is obtained.

The scan accuracy of each model may be different. For example, an abutment tooth model, which is a model of an abutment tooth as a base such as a crown or a bridge, may be scanned with higher accuracy than other models.

If there are a plurality of abutment tooth models, scan data for each abutment tooth model is acquired.
After the process of step S10, the CPU 21 determines whether or not the area of the marker portion included in each scan data and the area of the marker portion included in the positioning reference information 11a match (step S11).

The area of the marker portion is, for example, an area corresponding to the positioning reference information 11a and the model table included in each scan data. Regarding the scan data 50 of the maxillary model shown in FIG. 6, it is determined whether or not the region corresponding to the model table 35 and the region 11a1 shown in FIG. 3 match. Regarding the scan data 51 of the abutment toothless mandibular model shown in FIG. 6, it is determined whether or not the region corresponding to the model base 36 and the region 11a2 shown in FIG. 3 match. Regarding the scan data 52 of the abutment tooth model shown in FIG. 6, it is determined whether or not the region corresponding to the model base 37 and the region 11a2 shown in FIG. 3 match.

For example, when three marks for alignment are added to each model table, the CPU 21 uses the positioning reference information 11a and the three marks appearing in each area corresponding to each model table of each scan data. Determine if the regions match. For example, when the position error between the three marks included in the area 11a1 and the three marks included in the area corresponding to the model table 31 included in the scan data 50 of the maxillary model is within a predetermined value, the CPU 21 has both. It is determined that the areas match.

When the CPU 21 determines that the area of the marker portion does not match, the CPU 21 performs scan data by coordinate conversion or the like so that the area of the marker portion included in the scan data matches the area of the marker portion included in the positioning reference information 11a. Move or rotate (step S12). After that, the process from step S11 is repeated.

FIG. 7 is a diagram showing an example of alignment of each scan data.
The area of the marker portion of the scan data 50 of the maxillary model (the region 50a corresponding to the model table 35 in FIG. 6) is aligned so as to coincide with the region 11a1 of the marker portion included in the positioning reference information 11a. The area of the marker portion of the scan data 51 of the abutment toothless mandibular model (region 51a corresponding to the model table 36 in FIG. 6) is aligned so as to coincide with the region of the marker portion 11a2 included in the positioning reference information 11a. Is done. The area of the marker part of the scan data 52 of the abutment tooth model (the area 52a corresponding to the model table 37 in FIG. 6) is aligned so as to match the area 11a2 of the marker part included in the positioning reference information 11a. Will be.

When it is determined in the process of step S11 that the area of the marker portion included in each scan data and the area of the marker portion included in the positioning reference information 11a match, the CPU 21 outputs the alignment result (step). S13).

FIG. 8 is a diagram showing an output example of the alignment result.
In the example of FIG. 8, the occlusal state of the upper jaw model, the abutment tooth extraction lower jaw model, and the abutment tooth model is reproduced by the three-dimensional model 60 which is the alignment result. The CPU 21 outputs, for example, the three-dimensional model 60 to the display 24a and displays it.

After that, the CPU 21 deletes the data in the area of the marker portion (step S14), and ends the process.
FIG. 9 is a diagram showing an example of a three-dimensional model in which the area of the marker portion is deleted.

In FIG. 9, the three-dimensional model 60a when the data of the model stand region (regions 11a1, 11a2, 50a, 51a, 52a in FIG. 7) which is the marker portion is deleted from the three-dimensional model 60 shown in FIG. An example of is shown. Since the data in the area of the model table is not necessary for the design of the prosthesis, it is desirable to delete it as shown in FIG.

The above processing order is an example, and the processing order may be changed as appropriate.
As described above, in the alignment method and the information processing apparatus 20 of the second embodiment, the CPU 21 includes an upper jaw model, a lower jaw model (in the example of FIG. 6, an abutment tooth-extracted lower jaw model), and an abutment tooth model, respectively.

Scan data

50, 51, 52 obtained by scanning are acquired. Then, the CPU 21 determines the positional relationship between the scan data 50 to 52 based on the

regions

50a, 51a, 52a of the model stands 35 to 37 included in the scan data 50 to 52 and the positioning reference information 11a. Thereby, for example, the scan data of the upper and lower jaw models in the occlusal state and the scan data of the jaw model including the abutment tooth model can be aligned without preparing the scan data for the alignment.

FIG. 10 is the first example of scan data for alignment.
FIG. 10 shows scan data 72 of the upper and lower jaw models in the occlusal state for aligning the scan data 70 of the maxillary model and the scan data 71 of the lower jaw model so that the occlusal state is reproduced. Since the scan data 72 is used only for alignment, the scan accuracy may be lower than that of the

scan data

70 and 71.

FIG. 11 is a second example of scan data for alignment.
FIG. 11 shows scan data 82 of the mandibular model including the abutment tooth model for alignment of the

scan data

80 and 81 of the abutment tooth model. Since the scan data 82 is used only for alignment, the scan accuracy may be lower than that of the

scan data

80 and 81.

Since the

scan data

72 and 82 for alignment as shown in FIGS. 10 and 11 are prepared for each patient or case, for example, the scanning operation takes time. On the other hand, the alignment method and the information processing apparatus 20 of the second embodiment do not require scan data for alignment. Therefore, the time required for scanning work can be shortened.

Further, according to the above-mentioned alignment method, it becomes easy to realize the automation of the scanning work of various models, which has been difficult to realize until now, for the following reasons.
When acquiring scan data of the maxillary model and the mandibular model, scan data of the upper and lower jaw models for positioning, and scan data of the abutment tooth model, for example, processing is performed in the following order. First, the maxillary model is scanned (work 1) and the mandible model is scanned (work 2), and the maxilla model and the mandible model are positioned so as to be in an occlusal state (work 3). It is scanned (work 4). After that, all but the abutment teeth are removed from the maxillary model or the mandibular model (work 5), and the abutment tooth model is scanned (work 6).

Of the above tasks 1 to 6, tasks 3 and 5 are tasks that are difficult to automate. Since the alignment method of the second embodiment does not require scan data of the upper and lower jaw models for alignment, the operation 3 of positioning the upper jaw model and the lower jaw model so as to be in an occlusal state during the scanning operation is performed. Does not occur. Further, in the alignment method of the second embodiment, as shown in FIG. 6, since the abutment tooth model is also prepared when scanning the upper jaw model and the lower jaw model, the upper jaw is in the middle of the scanning operation. The work 5 of pulling out other than the abutment tooth from the model or the mandibular model does not occur.

The remaining work 1, 2, 4, 6 includes the installation work in which the user installs the model on the stage of the 3D scanner 25b, but the installation work can be performed by the robot arm. Even when the installation work is performed by the user, the work 3 to 5 becomes unnecessary, so that the time required for the scanning work can be shortened as compared with the case where the work 1 to 6 are all performed.

Conventionally, the system automatically aligns the scan data of the maxilla and the mandible based on the shape and characteristics of the teeth represented by the scan data of the maxilla and the mandible obtained by the intraoral scanner, and occlusal. There was a method of reproducing the state (see, for example, Patent Document 4).

However, if the alignment of the upper and lower jaw scan data is performed based on the shape and characteristics of the teeth represented by the upper and lower jaw scan data, the alignment result required by the user (for example, a dental technician) is obtained. May not be obtained.

In the alignment method of the second embodiment, as shown in FIG. 4, the main body 40 of the maxillary model or the main body 41 of the mandibular model is fixed at a fixed position with the model bases 35 and 36, or the thickness is adjusted. There is. That is, the positional relationship between the model tables 35 and 36 when the user puts the

main bodies

40 and 41 in the occlusal state is the same as the positional relationship with the regions of the model tables 31 and 32 in the positioning reference information 11a. It has been adjusted. Therefore, the alignment result of the obtained scan data of the maxillary model and the scan data of the mandibular model reflects the occlusal state specified by the user, and the alignment result desired by the user can be obtained.

As described above, the above processing contents can be realized by causing the information processing apparatus 20 to execute the program.
The program can be recorded on a computer-readable recording medium (eg, recording medium 26a). As the recording medium, for example, a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like can be used. Magnetic disks include FDs and HDDs. The optical disc includes a CD, a CD-R (Recordable) / RW (Rewritable), a DVD, and a DVD-R / RW. The program may be recorded and distributed on a portable recording medium. In that case, the program may be copied from the portable recording medium to another recording medium (for example, HDD 23) and executed.

The above merely indicates the principle of the present invention. Further, numerous modifications and modifications are possible to those skilled in the art, and the invention is not limited to the exact configurations and applications described and described above, and all corresponding modifications and equivalents are attached. It is considered to be the scope of the present invention according to the claims and their equivalents.

10 Information processing device 11 Storage unit 11a Positioning reference information 11a1, 11a2, 17a, 18a Area 11b 3D model 12 Processing unit 12a 3D scanner 12b Display device 15

Upper jaw model

15a,

16a Main body

15b, 16b Model stand 16 Lower jaw model 17, 18 Scan data

Claims

The first scan data obtained by scanning the maxillary model to which the first marker portion is attached and the second scan data obtained by scanning the mandibular model to which the second marker portion is attached are acquired. ,
The region of the first marker portion included in the first scan data, the region of the second marker portion included in the second scan data, the first marker portion, and the second marker. The positional relationship between the first scan data and the second scan data is determined based on the positioning reference information that defines the positional relationship of the unit.
An alignment program characterized by having a computer perform processing.
The first marker portion is a first model stand on which the main body of the maxillary model is installed, and the second marker portion is a second model stand on which the main body of the mandibular model is installed. The alignment program according to claim 1.
The positioning reference information scans an area including a third model table corresponding to the first model table and a fourth model table corresponding to the second model table fixed to the positioning jig. The alignment program according to claim 2, wherein the third scan data is obtained.
In the main body of the maxillary model or the main body of the lower jaw model, the positional relationship between the first model table and the second model table in the occlusal state is the region of the third model table in the positioning reference information. The feature is that the fixed position or the thickness of the first model table or the second model table is adjusted so as to have the same positional relationship with the area of the fourth model table. The alignment program according to claim 3.
After determining the positional relationship between the first scan data and the second scan data, the computer executes a process of deleting the data in the area of the first marker portion and the area of the second marker portion. The alignment program according to any one of claims 1 to 4, wherein the alignment program is to be used.
The maxillary model or the mandibular model is an abutment tooth removal model from which the abutment tooth model has been removed.
In the positioning information, the positional relationship between the first marker portion or the second marker portion and the third marker portion added to the abutment tooth model is defined.
To the computer
The fourth scan data obtained by scanning the abutment tooth model to which the third marker portion is added is acquired.
The first is based on the region of the third marker portion included in the fourth scan data, the region of the first marker portion or the region of the second marker portion, and the positioning reference information. The positional relationship between the scan data of the above or the second scan data and the fourth scan data is determined.
The alignment program according to any one of claims 1 to 5, wherein the processing is executed.
The alignment program according to claim 6, wherein the third marker portion is a fifth model stand on which the main body of the abutment tooth model is installed.
The computer
The first scan data obtained by scanning the maxillary model to which the first marker portion is attached and the second scan data obtained by scanning the mandibular model to which the second marker portion is attached are acquired. ,
The region of the first marker portion included in the first scan data, the region of the second marker portion included in the second scan data, the first marker portion, and the second marker. The positional relationship between the first scan data and the second scan data is determined based on the positioning reference information that defines the positional relationship of the unit.
Alignment method characterized by that.
A storage unit that stores positioning reference information that defines the positional relationship between the first marker unit attached to the maxillary model and the second marker unit attached to the mandibular model.
The first scan data obtained by scanning the maxillary model to which the first marker portion is attached and the second scan data obtained by scanning the mandibular model to which the second marker portion is attached. Is acquired, and is based on the area of the first marker portion included in the first scan data, the region of the second marker portion included in the second scan data, and the positioning reference information. The processing unit that determines the positional relationship between the first scan data and the second scan data,
An information processing device characterized by having.