JP2006130337A - Artificial dental root implant position calculating method, artificial dental root implant position calculating apparatus, computer program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an artificial dental root implant position calculating apparatus which calculates the implant position of an artificial dental root adapted to the tooth row and maxilla of a patient. <P>SOLUTION: A CPU 10 acquires three-dimensional tooth row data, the data of the maxilla continued to the tooth row and mastication data in the tooth row acquired from the patient and stores them in a RAM 11. The CPU 10 combines the tooth row data and the maxilla data by reading respective computer programs stored in an HD 12 to the RAM 11 and successively executing them, makes the generated composite data execute a mastication operation based on the mastication data, calculates the direction of occlusal force applied to a dental crown (denture) at the time of mastication, and calculates the implant position of the artificial dental root on the basis of the direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an artificial root placement position calculation method for calculating the placement position of an artificial root supporting a denture that supplements a missing portion of a dentition, and an artificial root placement position calculation device using the artificial root placement position calculation method The present invention relates to a computer program for causing a computer to function as the artificial root placement position calculating device, and a recording medium on which the computer program is recorded.

When a tooth is lost, an artificial root cavity of a desired shape is formed by cutting the submucosal jawbone in the defective part of the dentition, and an artificial root (implant) is embedded in the artificial root cavity, and this artificial root A treatment for supplementing the defective portion is performed by supporting the denture.
Since this artificial tooth root is embedded under the mucous membrane and the denture is covered on the protruding end from the mucous membrane, there is no spring necessary for conventional denture treatment, and the appearance of the dentition is good. Further, the denture supported by the artificial tooth root only needs to be maintained in the same manner as the natural tooth, and is excellent in stability because it is supported by the artificial tooth root.

When implanting an artificial tooth root as described above, the dentist obtains an X-ray image of the patient's jawbone. In addition, a tooth mold with a missing tooth is taken, and a dentition model is produced based on this tooth pattern.
This dentition model is handed over to a dental technician who forms a denture based on the dentition model to replace the missing part of the dentition called wax-up based on the remaining teeth in the dentition. .

Based on the X-ray image and the dentition model, the dentist calculates the length, thickness, and position of the artificial root to be embedded, and calculates the artificial root corresponding to the calculated length, thickness, etc. For example, it is selected from a ready-made structure (artificial tooth root) made of titanium.
In addition, the dentist provides an artificial periodontal cavity with a drill in order to embed the selected artificial tooth root at the position to be calculated as described above, and by fitting a titanium artificial tooth root into the artificial tooth root cavity. Then, the artificial tooth root is embedded in a predetermined position. Further, by covering the projecting end portion of the artificial root mucosa with a denture having a shape formed by a dental technician, the missing portion can be supplemented with a denture that matches the patient's dentition.

However, the dentist calculates the placement position of the artificial tooth root based on the state of the dentition based on the dentition model and the two-dimensional data of the jawbone based on X-ray images including CT (Computed Tomography). It is very difficult to accurately grasp the shape of the lower jawbone and the nervous system three-dimensionally, and in the perforation operation of the artificial periodontal cavity, it often depends on its own experience and appropriate intuition.
The mandible has a thick nervous system called the mandibular canal, the maxilla has a cavity called the maxillary sinus, and there are residual teeth adjacent to the missing part in the vicinity of the missing part where the artificial dental root should be placed. It is very difficult to pierce an artificial periodontal sinus while reliably avoiding these nervous systems, cavities, roots of remaining teeth, and the like.
In the above-described method, it is necessary for the dental technician to form the shape of the final denture based on the patient's dentition model created by the dentist. There was a problem that the technique, time, and expense for denture formation were required.

  The present invention has been made in view of the above circumstances, and acquires three-dimensional data of a dentition and three-dimensional data of a jawbone connected to the dentition, and the three-dimensional data of the dentition and the three-dimensional of the jawbone. Based on the synthesized data generated, the shape of the submucosal jaw bone and the root of each tooth can be fully understood, and the mandibular canal, maxillary sinus and adjacent roots were sufficiently avoided. It is an object of the present invention to provide an artificial tooth root position calculation method for calculating the position of an artificial tooth root, and an artificial tooth root position calculator using the artificial tooth root position calculation method.

  Another object of the present invention is a computer program for causing a computer to operate as the above-described artificial tooth placement position calculating device by causing the computer to read and sequentially executing the computer, and a recording medium storing the computer program Is to provide.

  An artificial tooth root placement position calculation method according to the present invention uses a calculation device including an accepting unit for receiving data from the outside, a storage unit, and a calculation unit, and implants an artificial tooth root that supports a denture that compensates for a missing portion of a dentition. In the artificial root placement position calculation method for calculating the insertion position, the reception unit receives the three-dimensional data of the dentition and the three-dimensional data of the jawbone connected to the dentition, and the received three-dimensional data of the dentition and the jawbone 3D data is stored in a storage unit, the stored three-dimensional data of the dentition and the three-dimensional data of the jawbone are synthesized by the calculation unit, and the generated dentition and the dentition indicated by the synthesized data of the jawbone Generating denture data indicating the dentures that make up the missing part of the tooth in the calculation unit, generating occlusion information in the denture indicated by the generated denture data based on the synthetic data, and generating the occlusion information based on the generated occlusion information The above And calculates the implantation position of the artificial tooth root supporting a dental by calculation unit.

  An artificial root placement position calculation device according to the present invention is an artificial root placement position calculation device that calculates a placement position of an artificial root that supports a denture that makes up a missing portion of a dental row. A dentition data acquisition unit to acquire, a jawbone data acquisition unit to acquire three-dimensional data of the jawbones connected to the dentition, and a three-dimensional data of the dentition acquired by the dentition data acquisition unit and the jawbone data acquisition unit Synthesizing means for synthesizing the acquired three-dimensional data of the jawbone, and denture data generating means for generating denture data indicating a denture that makes up the missing portion of the dentition indicated by the dentition generated by the synthesizing means and the synthesized data of the jawbone; Based on the synthetic data, occlusion information generating means for generating occlusion information in the denture indicated by the denture data generated by the denture data generating means, and occlusion information generated by the occlusal information generating means Based on, characterized by comprising a calculating means for calculating an implantation position of the artificial tooth root supporting the denture.

  In the case of the present invention, the three-dimensional data of the dentition and the three-dimensional data of the jawbone connected to the dentition are acquired, the three-dimensional data of the dentition and the three-dimensional data of the jawbone are synthesized, and the synthesized data generated Based on the above, it is possible to fully understand the shape of the submucosal jaw bone and the root of each tooth, etc., and to calculate the implantation position of the artificial root that sufficiently avoids the mandibular canal, the maxillary sinus and the adjacent root it can.

  Moreover, it has the structure which produces | generates the occlusion information in the dentition which the synthetic | combination data which added the produced | generated denture data shows, and the more suitable artificial tooth implantation position can be calculated from the produced | generated occlusion information.

  A computer program according to the present invention is a computer program for causing a computer to calculate a placement position of an artificial root that supports a denture that compensates for a missing portion of a dentition. A procedure for synthesizing the three-dimensional data of the jawbone connected to the dentition, a procedure for causing the computer to generate denture data indicating a denture that makes up the missing portion of the dentition indicated by the generated dentition and jawbone synthesis data; and a computer And generating the occlusal information in the denture indicated by the generated denture data based on the synthetic data, and causing the computer to calculate the implantation position of the artificial root supporting the denture based on the generated occlusion information. And a procedure is executed.

  A recording medium according to the present invention is a computer-readable recording medium in which a computer program for causing a computer to calculate an implantation position of an artificial tooth root that supports a denture that supplements a missing portion of a dentition is recorded. A procedure for causing the computer to synthesize the acquired three-dimensional data of the dentition and the three-dimensional data of the jawbone connected to the dentition; and the missing portion of the dentition indicated by the synthesized data of the generated dentition and jawbone. Based on the generated occlusion information, a procedure for generating denture data indicating a denture that supplements, a procedure for generating occlusion information in a denture indicated by the generated denture data based on the synthetic data, and a computer And a computer program for executing a procedure for calculating a placement position of the artificial root supporting the denture. Characterized in that there.

  In the case of the present invention, the computer is caused to read the computer program according to the present invention or the computer program recorded in the recording medium according to the present invention, and the computer is caused to sequentially execute the program code included in the computer program. Thus, the computer can be operated as the above-described artificial dental root position calculation device, and the artificial dental root position corresponding to the shape of the dentition and jawbone of each patient can be calculated accurately and at high speed.

  In the case of the present invention, the three-dimensional data of the dentition and the three-dimensional data of the jawbone connected to the dentition are acquired, the three-dimensional data of the dentition and the three-dimensional data of the jawbone are synthesized, and the synthesized data generated Based on the above, it is possible to fully understand the shape of the submucosal jaw bone and the root of each tooth, etc., and to calculate the implantation position of the artificial root that sufficiently avoids the mandibular canal, the maxillary sinus and the adjacent root it can.

  Moreover, it has the structure which produces | generates the occlusion information in the dentition which the synthetic | combination data which added the produced | generated denture data shows, and the more suitable artificial tooth implantation position can be calculated from the produced | generated occlusion information.

  In the case of the present invention, the computer is caused to read the computer program according to the present invention or the computer program recorded in the recording medium according to the present invention, and the computer is caused to sequentially execute the program code included in the computer program. Thus, the computer can be operated as the above-described artificial dental root position calculation device, and the artificial dental root position corresponding to the shape of the dentition and jawbone of each patient can be calculated accurately and at high speed.

Below, the artificial tooth root placement position calculation apparatus concerning the present invention is explained in full detail based on the embodiment using a computer. FIG. 1 is a block diagram showing the configuration of an artificial tooth placement position calculating apparatus according to the present invention. In FIG.
The computer 1 includes a CPU 10, a RAM 11, a hard disk (hereinafter referred to as HD) 12, an external storage device 13, a display 14, a keyboard 15, a mouse 16, and the like.

The CPU 10 is connected to the above-described hardware components of the computer 1 via a bus, controls them, and sequentially executes computer programs stored in the HD 12.
The HD 12 stores various computer programs necessary for operation as the artificial tooth placement position calculating device according to the present invention.
The RAM 11 includes SRAM, DRAM, flash memory, and the like, and stores temporary data generated when the CPU 10 executes a computer program. When a flash memory is used for the RAM 11, the stored contents are not lost even if the power is shut off due to a power failure, movement of the computer 1, or the like.

  The external storage device 13 is composed of a CD-ROM drive, a flexible disk drive, or the like. From the portable recording medium 13a such as a CD-ROM or a flexible disk on which the computer program according to the present invention is recorded, the external storage device 13 is provided. The dentition data acquisition processing program, jaw bone data acquisition processing program, mastication data acquisition processing program, synthesis processing program, denture data generation processing program and calculation processing program which are computer programs are read and stored in the HD 12.

In this embodiment, when a dentist uses the artificial tooth root placement position calculation device realized by the computer 1 having the above-described configuration, for each patient, dentition data and jawbone data are assigned to each tooth during mastication. Mastication data indicating applied load information is acquired in advance.
The dentition data is acquired as a three-dimensional data of the dentition from a dentition model prepared based on the tooth pattern collected from the patient. Is getting as. The jaw bone data is based on a plurality of CT images of the patient's jaw bone obtained by a CT (Computerized Tomography) imaging device that scans an X-ray beam to obtain a tomographic image of an internal organ of a human body. Generated as three-dimensional data. Furthermore, if the patient is using a denture, the mastication data indicates that the patient has a flexible material in a state where the denture is mounted at a predetermined position, and the load applied to each tooth during the mastication is shown. It is obtained by measuring the size and direction.

  In addition, the CT image and the tooth pattern described above soften a horseshoe ready-made compound such as Aro Wax (registered trademark) manufactured by Aro Inc. between the upper and lower jaw dentitions in the case of a patient with relatively many remaining teeth. Then, while the compound is softened, a ceramic ball having a diameter of about 7 mm is pressed into a predetermined portion outside the compound, and the ceramic ball is further fixed with an adhesive or the like. On the other hand, in the case of a patient with many missing teeth, the in-use denture (denture) used by the patient is attached, and the ceramic ball is fixed to the predetermined portion of the in-use denture with an adhesive or the like. In this way, by acquiring a CT image and a tooth pattern in a state where the ceramic ball is fixed at a predetermined location, in the artificial tooth root placement position calculating device according to the present invention, a mark used when synthesizing the dentition data and the jawbone data It can be.

As described above, the dentition data, jaw bone data, and mastication data acquired in each device are connected to the computer 1 via the cable by connecting each device to the computer 1 via the cable (not shown). It can also be stored in the RAM 11 provided, or can be once recorded on a recording medium such as a CD-ROM or a flexible disk from each device and stored in the RAM 11 via the external storage device 13 provided in the computer 1.
By storing the dentition data, the jawbone data, and the mastication data in the RAM 11 in this manner, the computer 1 can use each data for the calculation process of the artificial root implantation position described later.

Below, the calculation process of the implantation position of the artificial tooth root by the computer 1 of the structure mentioned above is demonstrated. FIG. 2 is a flowchart showing the artificial tooth placement position calculation process by the computer 1.
When the computer 1 is operated as the artificial tooth root placement position calculating device, the dentist uses the three-dimensional data about the target patient's dentition, the three-dimensional data about the jawbone connected to the dentition, and the dentition. The mastication data indicating the load information applied to each tooth at the time of mastication is acquired in advance by an external device, and a predetermined icon provided in the computer 1 is clicked with the mouse 16 to the computer 1. The artificial tooth placement position calculation process is executed.

When a predetermined icon is clicked by the dentist in the computer 1 (S1), the CPU 10 stores in the RAM 11 each computer program for operating as the artificial tooth placement position calculating device according to the present invention stored in the HD 12. Reading (S2), the program code included in each computer program is sequentially executed.
First, the CPU 10 sequentially executes a dentition data acquisition processing program, a jawbone data acquisition processing program, and a mastication data acquisition processing program, thereby acquiring dentition data, jawbone data, and mastication data from the outside and storing them in the RAM 11 (S3). ). As described above, each data may be acquired via the cable by connecting the respective device to the computer 1 via the cable. You may record on recording media, such as a flexible disk, and may acquire via the external storage device 13 with which the computer 1 is provided.

Next, the CPU 10 executes the synthesis processing program read out to the RAM 11, thereby synthesizing the dentition data stored in the RAM 11 and the jawbone data in step S3 to generate synthesized data (S4).
It should be noted that the CT image taken when generating the dental mold to be taken from the patient when acquiring the dentition data and the jaw bone data is generated at a predetermined position of the compound occluded between the dentitions of the upper and lower jaws of the patient. The ball is acquired in a fixed state, and the dentition data and the jaw bone data each include a ceramic ball. Therefore, by synthesizing the dentition data and the jawbone data on the basis of the ceramic balls having each other, it is possible to appropriately synthesize each tooth and the jawbone connected to the tooth.

  When the patient has a metal cover on the already treated tooth, the X-ray beam used when taking a CT image is reflected on the cover, so that a CT image including appropriate dentition information is displayed. It is very difficult to get. Therefore, by combining the dentition data acquired from the dentition model and the jawbone data generated from the CT image as described above, it is possible to acquire composite data composed of appropriate dentition data and jawbone data. .

The CPU 10 executes denture data generation processing program read into the RAM 11 to execute denture data indicating a denture that supplements a missing portion in the dentition, and in this embodiment, crown data indicating a crown that supplements the missing portion. Generate (S5). In addition, as a denture which supplements the said defect | deletion part, there exist a crown as shown in this Embodiment, a removable denture (denture), etc. The processing procedure for generating the crown data will be described in detail later.
Next, CPU10 judges whether there exists mastication data acquired in step S3 (S6). In the present embodiment, acquisition of mastication data as described above is not an essential requirement, and if the mastication data is not acquired in step S3, the CPU 10 determines the crown data generated in step S5 in step S4. The direction of occlusal force applied to each tooth in the dentition indicated by the synthetic data is added to the missing portion in the generated composite data and the missing portion is supplemented with the crown data, and the direction of the occlusal force is indicated. Occlusion information is generated and stored in the RAM 11 (S7).

The CPU 10 adds the generated crown data to the missing portion in the composite data generated in step S4, and executes the calculation processing program read out to the RAM 11, whereby the crown indicated by the crown data generated in step S5 is displayed. The placement position of the artificial tooth root to be supported is calculated (S8). A processing procedure for calculating the position of the artificial tooth root will be described later in detail.
Further, the CPU 10 obtains the implantation position data indicating the implantation position of the artificial tooth root by calculating as described above, displays the completion of the calculation process on the display 14 (S9), and calculates the implantation position. Exit.

The subroutine of the crown data generation process (step S5 in FIG. 2) in the above-described artificial tooth placement position calculation process will be described below. FIG. 3 is a flowchart showing a crown data generation process procedure in the artificial root placement position calculation process by the computer 1.
When executing the denture data generation processing program read into the RAM 11, the CPU 10 detects a missing portion in each dentition of the upper and lower jaws in the synthesized data of the generated dentition data and jaw bone data (S11), and the upper jaw or the lower jaw The position of the missing part in the dentition is recognized.

Next, the CPU 10 determines whether or not the same name tooth on the opposite side of the same jaw remains in the recognized missing portion (S12). That is, in the dentition having the recognized missing part, specifically, in the maxillary or mandibular dentition, whether or not there is a remaining tooth at a symmetrical position around the tooth located in the center with respect to the missing part. If it is determined that there is a remaining tooth at the position, it is determined whether or not the form and size of the remaining tooth are appropriate (S13).
When the CPU 10 determines that the form and size of the remaining tooth are appropriate, the CPU 10 generates crown data based on the shape of the remaining tooth (S14).

  On the other hand, when it is determined in step S12 that the same-named tooth on the opposite side of the same jaw does not remain, it is determined whether or not there are other remaining teeth on the same jaw (S15). If the CPU 10 determines that there are other remaining teeth on the same jaw, and if it is determined in step S13 that the remaining teeth on the opposite side of the same jaw of the missing portion are not appropriate, each remaining portion of the same jaw. The tooth width diameter is measured (S16), and based on the average crown width diameter, crown data indicating a crown that compensates for the missing portion is generated (S17).

In step S15, when the CPU 10 determines that there are no remaining teeth on the same jaw of the missing portion, it determines whether or not there is a remaining tooth on the opposite jaw of the missing portion (S18). If it is determined that there is a remaining tooth on the jaw, it is determined whether or not the form and size of the remaining tooth are appropriate (S19).
When the CPU 10 determines that the form and dimensions of the remaining teeth are appropriate, the CPU 10 measures the width of each remaining tooth on the opposite jaw (S20), and calculates the average from the measured width of each remaining tooth. Based on the width of the crown, crown data indicating a crown to compensate for the missing portion is generated (S17).

If the CPU 10 determines in step S18 that there are no remaining teeth on the jaws of the missing part and if it determines in step S19 that the remaining teeth on the jaws are not appropriate, the dentures in use of the patient It is determined whether or not there is (S21).
If the CPU 10 determines that the patient has a denture in use, the CPU 10 determines whether or not the form and size of the in-use denture is appropriate (S22), and that the form and size of the in-use denture is appropriate. When the determination is made, the width diameter of each artificial tooth in the dental prosthesis in use is measured (S23), and based on the measured width diameter of each artificial tooth, crown data indicating a crown that makes up the missing portion is generated (S24). ).

If the CPU 10 determines that there is no in-use denture in step S21 and if it is determined in step S22 that the in-use denture is not appropriate, the CPU 10 measures the width of the patient's nasal wing (S25) and measures the measured nasal wing. Based on the width diameter, crown data indicating a crown to compensate for the missing portion is generated (S26). In addition, not only a patient's nose wing width diameter but a crown data can also be produced | generated based on the measured value of each part of a patient's face.
As described above, by generating the crown shape that compensates for the missing portion based on the remaining teeth on the same jaw, the crown data that matches the teeth and ridges of each patient is generated. can do. In addition, even when there are no remaining teeth in the same jaw, by generating a crown shape that compensates for the missing portion based on the dentures in use, crown data that matches each patient's dentition is generated. be able to.

Hereinafter, a subroutine of the calculation process (step S8 in FIG. 2) in the above-described artificial tooth placement position calculation process will be described. FIG. 4 is a flowchart showing a calculation processing procedure in the artificial tooth root placement position calculation processing by the computer 1.
When the CPU 10 executes the calculation processing program read into the RAM 11, the CPU 10 adds the crown data to the combined data of the already generated dentition data and jaw bone data (S31), and the dentition has no missing portion. Generate data.

Next, the CPU 10 determines whether or not the mastication data is stored in the RAM 11 (S32). If it is determined that there is the mastication data, the CPU 10 substitutes the mastication data read from the RAM 11 into the synthesized data having no missing portion. (S33) In the dentition indicated by the combined data, a mastication operation based on the mastication data is virtually executed (S35).
On the other hand, if the CPU 10 determines that there is no mastication data, the CPU 10 reads the occlusion information stored in the RAM 11 and substitutes the occlusion information into composite data having no missing portion (S34).
As a result, in the dentition indicated by the composite data, the direction of the occlusal force from the opposing teeth applied to each tooth during mastication is calculated, and at the same time, the crown indicated by the crown data is applied from the opposing teeth during mastication. The direction of the occlusal force is searched (S36).

Based on the direction of the occlusal force applied to the crown during mastication, which is sequentially searched as described above, the CPU 10 calculates the placement position where the artificial tooth root that supports the dental crown that is mechanically optimal should be placed. (S37). Further, the CPU 10 determines whether or not the sequentially calculated implantation positions are anatomically safe based on the conditions of the mandibular canal, the maxillary sinus and the adjacent root of the mucous membrane where the crown is to be implanted. The process returns to step S36 until the calculated placement position avoids the mandibular canal, the maxillary sinus and the adjacent root, and determines that it is anatomically safe. Based on the direction of the occlusal force applied to the crown, a placement position where the artificial tooth root supporting the dental crown that is mechanically optimal is to be placed is calculated (S37).
If the CPU 10 determines in step S38 that the calculated implantation position is anatomically safe, the CPU 10 acquires implantation position data indicating the implantation position (S39). Specifically, an angle, a position, and the like at which the artificial tooth root should be embedded are acquired.

  As described above, when calculating the placement position of the artificial tooth root, the dental crown that compensates for the missing part of the dentition is calculated according to each patient's unique chewing action by considering the individual chewing data It can be supported by the artificial tooth root embedded in the embedded position, and the load on other remaining teeth can be reduced. In addition, even when the mastication data cannot be obtained, the occlusion information in the dentition indicated by the synthesis data is generated based on the synthesis data, and the implantation position of the artificial tooth root is calculated based on the generated occlusion information. Thus, the same effect can be obtained.

As described above, the shape of the submucosal jawbone can be fully grasped based on the synthesized data generated by synthesizing the three-dimensional dentition data and the jawbone data, and the nervous system and nearby tooth roots can be sufficiently obtained. Therefore, it is possible to calculate the position of the artificial tooth root avoided.
In addition, mastication indicating occlusal force information at the time of mastication in the dentition obtained in advance is generated in the composite data in which the crown data indicating the crown portion that compensates for the missing portion of the dentition is added and the crown data is added. By performing the mastication operation based on the data, it is possible to calculate the implantation position of the artificial tooth root more suitable for the patient's dentition based on the individual mastication data of the patient.

Below, the manufacturing process of the guide member which is an auxiliary member at the time of drilling the artificial dental fossa sinus which implants an artificial tooth root accurately in the implantation position calculated as mentioned above is demonstrated.
FIG. 5 is a block diagram showing the configuration of the main part of the guide member manufacturing apparatus according to the present invention. In FIG. 5, reference numeral 2 shows the guide member manufacturing apparatus of the present invention. The guide member manufacturing apparatus 2 includes a control unit 20, a RAM 21, an HD 22, a material storage unit 23, a member forming unit (forming unit) 24, a punching unit (punching unit) 25, a display unit 26, an operating unit 27, and an external storage device 28. Etc.

Specifically, the control unit 20 is configured by a CPU or the like, and is connected to the above-described hardware units of the guide member manufacturing apparatus 2 via a bus. The control unit 20 controls them and is a computer stored in the HD 22. Run the program sequentially.
The HD 22 stores various computer programs necessary for the operation of the guide member manufacturing apparatus 2 according to the present invention.
The RAM 21 includes SRAM, DRAM, flash memory, and the like, and stores temporary data generated when the control unit 20 executes the computer program. When a flash memory is used for the RAM 21, the stored contents are not lost even when the power is cut off due to a power failure, movement of the guide member manufacturing apparatus 2, or the like.

The external storage device 28 is constituted by a CD-ROM drive or a flexible disk drive, and reads each data from a portable recording medium such as a CD-ROM or a flexible disk in which various data and computer programs are recorded. Remember me.
In the guide member manufacturing apparatus 2, by connecting the composite data and the implantation position data calculated by the computer 1 as the above-described artificial tooth implantation position calculating apparatus, via the computer 1 and a cable (not shown), It is good also as composition which acquires via the cable and memorizes it in RAM21. Moreover, the above-mentioned synthetic data and embedding position data are once recorded on recording media, such as CD-ROM or a flexible disk, from computer 1, and a guide member manufacturing device 2 can also be stored in the RAM 21 via the external storage device 28 provided in FIG. By storing the composite data and the implantation position data in the RAM 21 as described above, the guide member manufacturing apparatus 2 can use each data for the guide member manufacturing process.

The material storage unit 23 stores, for example, an acrylic range block in which an acrylic range or the like is formed in an appropriate shape as a raw material of the guide member, and the acrylic range block is appropriately stored in the member formation unit 24 according to control from the control unit 20. Send it out.
The member forming unit 24 includes a cutting tool and the like, and the acrylic range block acquired from the material storage unit 23 is included in the composite data stored in the RAM 21 as described above under the control of the control unit 20. Cutting is performed based on the denture data and the data indicating the tooth adjacent to the denture indicated by the denture data, and the tooth is formed into the shape of the denture and the tooth adjacent to the denture, and sent to the punching unit 25. In addition, since the cut acrylic range block is attached to the missing portion in the missing portion of the patient's dentition by being hooked on the tooth adjacent to the missing portion, the formed adjacent tooth was formed. In the part, it is formed in a coronal shape.

The punching unit 25 drills a guide hole in the acrylic range block cut into a desired shape by the member forming unit 24 at a position connected to the embedding position data stored in the RAM 21 under the control of the control unit 20.
The display unit 26 is a display device such as a liquid crystal display (LCD), and displays an operation state of the guide member manufacturing apparatus 2 and the like.
The operation unit 27 includes function keys necessary for operating the guide member manufacturing apparatus 2 and an execution key 27a for causing the guide member manufacturing apparatus 2 to execute a guide member manufacturing process. In addition, it is also possible to substitute a part or all of the various keys of the operation unit 27 by using the display unit 26 as a touch panel system.

Below, the manufacturing process of the guide member by the guide member manufacturing apparatus 2 of the structure mentioned above is demonstrated. FIG. 6 is a flowchart showing a guide member manufacturing process performed by the guide member manufacturing apparatus 2 according to the present invention.
The dentist who operates the guide member manufacturing apparatus 2 calculates the composite data and the implantation position data by the computer 1 as described above, and turns on the execution key 27a included in the operation unit 27 of the guide member manufacturing apparatus 2. Thus, the guide member manufacturing apparatus 2 is made to manufacture the guide member.

In the guide member manufacturing apparatus 2, when the execution key 27a is turned on by the dentist (S41), the control unit 20 acquires the composite data and the implantation position data from the outside and stores them in the RAM 21 (S42).
Next, the control unit 20 sends one acrylic range block stored in the material storage unit 23 to the member forming unit 24 (S43), and the member forming unit 24 performs a cutting process based on the composite data stored in the RAM 21. As a result, the guide member is formed by cutting into the shape of the crown and the remaining teeth adjacent to the crown indicated by the crown data included in the combined data (S44).

Next, the control unit 20 guides the guide member formed in step S44 to the position continuous with the embedding position indicated by the embedding position data by the punching unit 25 based on the embedding position data stored in the RAM 21. A hole is drilled (S45). As a result, when the guide member is attached to the surgical site of the patient, specifically, in the missing part of the dentition by being hooked on the remaining tooth adjacent to the missing part, the artificial periodontal cavity to be perforated is removed. The guide hole is arranged at the extended position.
When the guide hole is drilled at a desired location of the guide member, the control unit 20 displays the completion of the drilling process on the display unit 26 (S46), and ends the guide member manufacturing process.

FIG. 7 is a schematic diagram showing an example of the guide member, and in the figure, 3 indicates the guide member. The guide member 3 is supported by the crown portion 30 formed in the shape of a crown that compensates for the missing portion of the dentition and the adjacent teeth 34a, 34b, and 34c adjacent to the missing portion, and supports the crown portion 30. Supporting portions 31a, 31b, and 31c are provided, and guide holes 32 and 32 are formed in the crown portion 30.
Such a guide member 3 fixes the crown portion 30 by covering the adjacent teeth 34a, 34b, and 34c with the support portions 31a, 31b, and 31c, as indicated by arrows A, A, and A in the figure. In such a guide member 3, the tip of a drilling device such as a drill is fitted in each of the guide holes 32 and 32, and the lower part of the mucous membrane 35 is drilled along the guide holes 32 and 32. Thereby, the artificial dental fossa 33 and 33 in the target implantation position can be drilled.

  Further, in a patient who uses a complete denture (so-called complete denture) or the like, there is no remaining tooth and the guide member 3 cannot be hooked, so that the crown portion 30 can be placed directly on the surface of the jawbone. A guide member having a shape in which the basal plane of the crown portion 30 matches the shape of the jawbone surface may be manufactured.

Hereinafter, as described above, a detection device that is mounted on a perforating device that perforates an artificial dental fossa using the guide member 3 manufactured by the guide member manufacturing device 2 and detects the perforating direction of the perforating device will be described.
FIG. 8 is a block diagram showing the configuration of the detection apparatus according to the present invention, and 4 in the figure shows the detection apparatus of the present invention. The detection device 4 is configured by connecting a main body portion 40 and a detection portion (detection means) 53 including a gyro sensor or the like attached to the punching device 50 via a cable 54. In addition, the structure which integrates this main-body part 40 and the detection part 53 is also possible.

The main body 40 includes a control unit 41, a RAM 42, a ROM 43, a display unit 45, an operation unit 46, an interface 44 for connecting to the detection unit 53, and the like.
Specifically, the control unit 41 is configured by a CPU, an MPU, or the like, and is connected to the hardware unit as described above of the main body unit 40 through the bus and the detection unit 53 through the interface 44. While controlling, the computer program stored in ROM43 is executed sequentially.

The ROM 43 stores various computer programs necessary for the operation of the detection device 4 according to the present invention, for example, a drilling direction determination processing program.
The RAM 42 includes SRAM, DRAM, flash memory, and the like, and stores temporary data generated when the control unit 41 executes the computer program. When a flash memory is used for the RAM 42, the stored contents are not lost even when the power is cut off due to a power failure, movement of the detection device 4, or the like.

The display unit 45 is a display device such as a liquid crystal display device, and displays an operation state and the like of the detection device 4. In addition, a notification lamp 45a composed of an LED (Light Emitting Diode) as notification means for notifying an error in the punching direction in the punching device 50 is provided. The notification lamp 45a lights up in blue, for example, if the drilling direction of the drilling device 50 is appropriate, and lights up in red, for example, if the drilling direction is inappropriate. Moreover, in order to notify not only the notification lamp 45a but also the error in the punching direction of the punching device 50 by voice, a configuration including a buzzer or the like may be used.
The operation unit 46 includes function keys and the like necessary for operating the detection device 4. In addition, it is also possible to substitute a part or all of the various keys of the operation unit 46 by using the display unit 45 as a touch panel system.

The perforating apparatus 50 includes a holding portion 51 that is sufficiently held by a dentist, and a drill portion 52 protrudes perpendicularly to the longitudinal direction of the holding portion 51 at one end portion of the holding portion 51. It is. The drill portion 52 is connected to an engine portion (not shown) via a cable 55, and is configured to rotate by power supply from the engine portion.
In the detection device 4 in the present embodiment, the detection unit 53 is attached to an appropriate position of the holding unit 51 of the drilling device 50 where the drilling direction of the drill unit 52 can be detected.

  The detection unit 53 inputs the detected drilling direction in the drill unit 52 of the drilling device 50 to the control unit 41 of the main body unit 40 via the cable 54, and the control unit 41 stores the drilling direction determination process stored in the ROM 43. By executing the program, it is determined whether or not the drilling direction of the drill unit 52 is appropriate. The detection unit 53 is provided with a set key 53a, and the detection direction of the detection unit 53 at the time when the set key 53a is turned on is stored in the RAM 42 of the main body unit 40 as a setting direction.

As shown in FIG. 8, the perforation device 50 to which the detection device 4 having the above-described configuration is attached uses the guide member 3 manufactured by the guide member manufacturing device 2 and uses the guide member 3 attached to the surgical site of the patient. By fitting the drill portions 52 along the guide holes 32, 32, the drilling direction of the drill portion 52 can be maintained to some extent. Further, the control unit 41 determines whether or not the drilling direction in the drill unit 52 detected by the detection unit 53 is a setting direction that is calibrated in advance by the set key 53 a in the main body unit 40 and stored in the RAM 42. By doing so, it is possible to perform the drilling process while reliably maintaining an appropriate drilling direction.
The detection unit 53 may be constituted by not only a gyro sensor but also an optical sensor or the like, and three-dimensionally detects the position of the dentist's arm, the position of the perforation device 50, the patient's body position, body position, and jaw position. By providing such a configuration, it is possible to perform the perforation processing of the artificial dental fossa sinus with higher accuracy.

Below, the perforation process of the artificial periodontal sinus by the perforation apparatus 50 which mounted | wore the detection apparatus 4 of the structure mentioned above is demonstrated. FIG. 9 is a flowchart showing a drilling process of the artificial dental fossa sinus by the drilling device 50 equipped with the detection device 4 according to the present invention.
A dentist performing a perforation operation on an artificial dental fossa sinus attaches the guide member 3 manufactured by the guide member manufacturing apparatus 2 to the patient's surgical site, that is, a defect in the dentition, as described above. The holding portion 51 is held, the tip portion of the drill portion 52 is fitted from the opening end of the guide hole 32 of the guide member 3 attached to the surgical site of the patient, and the set key 53a of the detecting portion 53 is turned on.

The detection unit 53 determines whether or not the set key 53a is turned on (S51). When it is determined that the set key 53a is turned on, the detection unit 53 determines the drilling direction of the drill unit 52 detected at this point in time by the cable 54. To the control unit 41.
The control unit 41 causes the notification lamp 45a included in the display unit 45 to blink in blue (S52) and simultaneously stores the drilling direction acquired from the detection unit 53 in the RAM 24 as a setting direction (S53).
On the other hand, the detection unit 53 detects the drilling direction of the drill unit 52 at a predetermined timing, and sequentially inputs it to the control unit 41 of the main body unit 40 via the cable 54.

  The control unit 41 sequentially acquires the drilling direction of the drill unit 52 detected by the detection unit 53 (S54), reads out the drilling direction determination processing program stored in the ROM 43 into the RAM 42, and executes it to detect the drilling direction from the detection unit 53. It is determined whether or not the acquired drilling direction matches the set direction stored in the RAM 42 and is an appropriate drilling direction (S55). The guide hole 32 of the guide member 3 is drilled so as to be continuous with the artificial dental fossa sinus to be drilled, and the drill portion 52 is fitted so that the central axis of the drill portion 52 coincides with the central axis of the guide hole 32. It is necessary to match.

When the control unit 41 determines that the perforation direction acquired from the detection unit 53 is not appropriate, the control unit 41 lights the notification lamp 45a in red (S56) and displays that the perforation direction is inappropriate on the display unit 45 ( S57). The notification lamp 45a can be lit in three colors of blue, yellow, and red, so that the color to be lit may be changed according to the inappropriate degree of the drilling direction of the drill portion 52. Further, as a means for notifying that the drilling direction of the drill part 52 is inappropriate, it is also possible to employ a configuration that emits a warning sound in addition to the notification lamp 45a.
When the dentist confirms that the notification lamp 45a is turned on in red, the dentist stops the rotation of the drill unit 52 and appropriately corrects the drilling direction of the drill unit 52.

On the other hand, when the control unit 41 determines that the perforation direction acquired from the detection unit 53 is appropriate, the control lamp 41 turns on the notification lamp 45a in blue (S58) and displays on the display unit 45 that the perforation direction is appropriate. (S59).
When the dentist recognizes the drilling depth based on the decrease in the length of the drill part 52 exposed from the upper part of the guide member 3 due to the drilling of the drill part 52 and drills to the predetermined drilling depth. The end of the punching process can be instructed by operating the operation unit 46 or the like.

The control unit 41 determines whether or not there is an instruction to end the drilling process from the dentist (S60), returns to the process of step S54 until the end of the drilling process is instructed, and drills in the drill unit 52 The process of determining whether or not the direction is appropriate is repeated.
When the control unit 41 determines that the end of the perforation process of the artificial dental fossa sinus has been instructed, the control unit 41 displays the completion of the perforation process on the display unit 45 (S61), and ends the process.
Thereafter, the dentist implants an artificial dental root, which is a titanium ready-made structure, into the perforated artificial dental fossa and implants the dental crown by joining the crown to the protruding end of the artificial dental root. It is possible to make up artificial roots and crowns more suitable for each patient by making up for the missing part in the dentition.

  In the embodiment described above, the computer program for operating as the artificial tooth root placement position calculating device is stored in the HD 12 of the computer 1 from the recording medium 13 a via the external storage device 13. It is good also as a structure which acquires each computer program from another communication apparatus via an external network by providing the communication interface etc. for connecting.

It is a block diagram which shows the structure of the artificial tooth root placement position calculation apparatus which concerns on this invention. It is a flowchart which shows the artificial tooth root placement position calculation process by a computer. It is a flowchart which shows the crown data production | generation process sequence in the artificial tooth root placement position calculation process by a computer. It is a flowchart which shows the calculation process sequence in the artificial tooth root placement position calculation process by a computer. It is a block diagram which shows the principal part structure of the guide member manufacturing apparatus which concerns on this invention. It is a flowchart which shows the manufacturing process of the guide member by the guide member manufacturing apparatus which concerns on this invention. It is a schematic diagram which shows an example of a guide member. It is a block diagram which shows the structure of the detection apparatus which concerns on this invention. It is a flowchart which shows the perforation process of the artificial periodontal sinus by the perforation apparatus with which the detection apparatus which concerns on this invention was mounted | worn.

Explanation of symbols

1 Computer 11 RAM
13a Recording medium 2 Guide member manufacturing device 24 Member forming section (forming means)
25 Perforated part (perforating means)
DESCRIPTION OF SYMBOLS 3 Guide member 32 Guide hole 4 Detection apparatus 45a Notification lamp 52 Drill part 53 Detection part (detection means)

Claims (4)

In an artificial tooth root position calculation method for calculating a root position of an artificial tooth that supports a denture that supplements a missing portion of a dentition using a calculation device including a receiving unit that receives data from the outside, a storage unit, and a calculation unit ,
Accepting the three-dimensional data of the dentition and the three-dimensional data of the jawbone connected to the dentition in the accepting unit,
Storing the received three-dimensional data of the dentition and three-dimensional data of the jawbone in a storage unit;
Combining the stored three-dimensional data of the dentition and three-dimensional data of the jawbone in the calculation unit,
Generating denture data indicating a denture that compensates for the missing portion of the dentition indicated by the generated dentition and jaw bone composite data,
Based on the synthetic data, the operation unit generates occlusion information in the denture indicated by the generated denture data,
An artificial tooth placement position calculation method, characterized in that, based on the generated occlusal information, a placement position of an artificial tooth root that supports the denture is calculated by a calculation unit. In the artificial tooth root placement position calculation device that calculates the placement position of the artificial tooth root that supports the denture that makes up the missing part of the dentition,
Dentition data acquisition means for acquiring three-dimensional data of the dentition;
Jaw bone data acquisition means for acquiring three-dimensional data of jaw bones connected to the dentition;
Combining means for combining the three-dimensional data of the dentition acquired by the dentition data acquisition means and the three-dimensional data of the jawbone acquired by the jawbone data acquisition means;
Denture data generation means for generating denture data indicating a denture that supplements the missing portion of the dentition indicated by the combination data of the dentition and jawbone generated by the synthesis means;
Based on the synthetic data, occlusion information generating means for generating occlusion information in the denture indicated by the denture data generated by the denture data generating means,
An artificial root placement position calculation device comprising: calculation means for calculating a placement position of an artificial tooth root that supports the denture based on the occlusion information generated by the occlusion information generation means. In a computer program for causing a computer to calculate a placement position of an artificial tooth root that supports a denture that supplements a missing portion of a dentition,
A procedure for causing the computer to synthesize the acquired three-dimensional data of the dentition and the three-dimensional data of the jawbones connected to the dentition;
A procedure for causing the computer to generate denture data indicating a denture that supplements the missing portion of the dentition indicated by the generated dentition and jaw bone composite data;
A procedure for causing the computer to generate occlusion information in the denture indicated by the generated denture data based on the synthetic data;
A computer program for causing a computer to execute a procedure for calculating a placement position of an artificial tooth root that supports the denture based on the generated occlusion information. In a computer-readable recording medium in which a computer program for calculating a placement position of an artificial tooth root that supports a denture that supplements a missing portion of a dentition is recorded in a computer,
A procedure for causing the computer to synthesize the acquired three-dimensional data of the dentition and the three-dimensional data of the jawbone connected to the dentition;
A procedure for causing the computer to generate denture data indicating a denture that makes up the missing portion of the dentition indicated by the generated dentition and jaw bone composite data;
A procedure for causing the computer to generate occlusion information in the denture indicated by the generated denture data based on the composite data;
A recording medium on which is recorded a computer program for causing a computer to execute a procedure for calculating a placement position of an artificial tooth root that supports the denture based on generated occlusion information.

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