KR20170079728A

KR20170079728A - Method for planning implant surgery accompanied maxillary sinus augmentation, apparatus and recording medium thereof

Info

Publication number: KR20170079728A
Application number: KR1020150190605A
Authority: KR
Inventors: 정정운
Original assignee: 오스템임플란트 주식회사
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2017-07-10
Also published as: KR101762655B1

Abstract

The present invention relates to an implant procedure planning method accompanied by a maxillary and mandibular lift, an apparatus therefor, and a recording medium on which the implantation procedure is carried out. According to the method for planning an implant procedure according to the present invention, The successful operation can be performed and the cost burden on the patient can be reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an implant treatment planning method involving an elevation of a maxillary sinus, an apparatus therefor, and a recording medium recording the same.

More particularly, the present invention relates to a method for establishing an implant treatment plan accompanied by a maxillary sinus elevation through simulation of tooth placement, a device for the same, and a recording medium for recording the same Media.

For a successful implant procedure, it is important that the fixture is secured to the bone. However, when the bone tissue at the position where the fixture is to be implanted is weak or the thickness of the bone is not sufficient, the bone tissue is reinforced through the implantation of the autogenous bone, artificial bone,

Particularly, when implantation is performed under the maxillary sinus (maxillary sinus), the bone thickness is insufficient compared with the fixture length, and the implantation is often difficult. In this case, if the implant is forcibly performed, the implanted bone can not be sufficiently supported by the surrounding bone tissue, so that the implanted bone may be broken or the surrounding bone tissue may be broken during the chewing motion. In order to prevent the above problems, when the thickness of the upper jaw bone is not sufficient, the maxillary sinus membrane is raised and the bone is implanted in the maxillary sinus to perform a maxillary sinus lift to secure the implantation space.

According to the prior art, only the implant placement plan that determines the position, orientation, shape, and the like is selected by selecting the kind and size of the implant suitable for the patient's condition through simulation, and the amount of bone to be implanted in the maxillary sinus is arbitrarily .

As described above, the following problems arise when arbitrarily determining the amount of bone graft. Since it is difficult to accurately determine whether the amount of bone to be implanted can adequately support the implant, a greater amount of bone is usually implanted than is actually needed to ensure stability. As a result, there is a problem that the material cost burdened by the patient is increased. In addition, the maxillary sinus plays an important role in regulating the pressure and weight of the head, the temperature of the air introduced through the nose, and the sound resonance. .

There are many reports of side effects after the operation as a treatment for the maxillary sinus elevation, and a method of minimizing side effects by accurately calculating the amount of bone to be implanted in the implant treatment plan is required.

The present invention has been made in order to solve the problems of the prior art in which a bone marrow transplantation amount is arbitrarily determined without a precise judgment in the case of a maxillary sinus elevation, And an object of the present invention is to provide an implant treatment planning method, an apparatus therefor, and a recording medium on which the implant treatment planning method can be accurately calculated.

According to another aspect of the present invention, there is provided a method of planning an implant operation involving a maxillary sinus elevation through simulation according to an embodiment of the present invention, comprising: obtaining a first image data for a maxillary sinus area by extracting a maxillary sinus area from a volume image; Obtaining second image data by removing a region overlapping with a region required for placement of a fixture in the maxillary sinus region; Obtaining third image data by removing an area overlapping the second image data in the first image data; And calculating the bone mass based on the volume of the region according to the third image data.

In addition, the method may further include a placement simulation step of arranging at least one implant object constituting an implant including a fixture on the volume image, wherein the area required for placement of the fixture in acquiring the second image data is Can be determined and determined by extending a predetermined distance from the boundary of the fixture disposed through the placement simulation.

Further, the method may further include determining whether to perform the maxillary / maxillofacial lift based on the result of the placement simulation of placing the implant object constituting the implant on the volume image.

The acquiring of the first image data may be performed by extracting voxels corresponding to a CT number (CT number) corresponding to the region of the maxillary sinus on the volume image.

In addition, the above object can also be achieved by a computer-executable recording medium on which a program for executing the above-described implant treatment planning method is recorded.

In addition, the above object is also achieved by an apparatus for planning an implant procedure involving a maxillary sinus elevation through simulation according to another aspect of the present invention, the apparatus comprising: means for extracting a maxillary sinus area from a volume image, A maxillary sinusoidal extracting unit to acquire; A fixture area removal unit that obtains second image data in which an area overlapping with a region required for placement of a fixture in the maxillary sinus area is removed; And a bone grafting unit for calculating a bone graft based on a volume of an area corresponding to third image data in which an area overlapping with the second image data is removed from the first image data, Can be achieved.

In addition, the maxillary sinusoidal extractor and the fixture area eliminator may perform surface rendering to obtain the first image data and the second image data.

The placement simulation unit may further include a placement simulation unit configured to virtually generate an implant object constituting the implant and to place the implant object in the volume image. The fixture area elimination unit may include a placement simulation unit that is required for placement of the fixture based on the placement result by the placement simulation unit Area can be grasped.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, a proper amount of bone can be implanted, thereby achieving a successful operation and reducing the cost of the patient.

1 is a block diagram of an implant treatment planning apparatus according to an embodiment of the present invention;
2 is a flowchart of an implant procedure planning method according to an embodiment of the present invention;
3 is a reference diagram for explaining acquisition of first image data for a maxillary sinus area;
4 is a view for explaining the acquisition of second image data from which an area overlapping the fixture area is removed from the maxillary sinus area; And
5 is a reference diagram for explaining the acquisition of third image data for a bone graft region during a maxillary and maxillofacial lift.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings and the inventor is not limited to the concept of terminology for describing his or her invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

The implant treatment planning apparatus according to the present invention provides simulations for implanting an implant object constituting an implant such as a fixture, a crown, and an abutment at a pre-treatment planning stage. Further, when the implant surgery plan apparatus according to the present invention requires a maxillary and mandibular lift for securing an implant placement space by implanting a bone in a maxillary sinus, simulations of a maxillary and mandibular anthropometry for calculating a bone graft amount are performed together, Supports the planning of the treatment plan.

1 is a block diagram of an implant treatment planning apparatus according to an embodiment of the present invention. 1, the implant treatment plan apparatus 100 includes a user interface unit 10, a placement simulation unit 20, a maxillary sinusoidal extraction unit 30, a fix region eliminator 40, and a bone- 50).

The user interface unit 10 may be implemented with an input means for inputting information such as a mouse, a keyboard, a button, a keypad, etc., and a GUI on the screen in order to receive input from a user and display various information.

The placement simulation unit 20 simulates the implant object placement simulation in which an implant object is virtually created and placed in an image. The placement simulation unit 20 can determine the object attributes such as the position, orientation, and angle of the implant object and the dimensions, size, and shape of the object, and arrange the implant object on the image. Based on the information input from the user and the previously prepared criteria.

In this way, whether or not the simulation for performing the maxillary and maxillary hyperkeratosis is performed is determined according to the position of the implant object disposed in the image through the placement simulation unit 20. For example, if the fixture is not disposed near the maxillary sinus, or even if the fixture is disposed, if the thickness and density of the bone under the maxillary sinus are sufficient and it is not necessary to implant the bone in the maxillary sinus, the simulation of the maxillary sinus lift is not performed. Conversely, As a result, when the fixture is inevitably involved in the maxillary sinus, the maxillary sinus lift simulation is performed.

Hereinafter, the maxillary sinusoidal extraction unit 30, the fixture area elimination unit 40, and the bone morphological calculation unit 50 for performing a maxillary and maxillofacial lift simulation will be described.

The maxillary sinusoidal extractor 30 extracts a sinusoidal region corresponding to a position at which the implant is to be placed in the three-dimensional volume image in which the head and the neck are displayed, and obtains the first image data of the maxillary sinus. The maxillary sinusoidal extractor 30 can separate only the maxillary sinusoidal region from the volume image based on a gray scale.

If the volume image is a CT (Computer Tomography) image, the maxillary sinusoidal extractor 30 extracts voxels having the corresponding CT number (CT number) of the maximal sinusoidal region among the voxels constituting the volume image, I can do it. At this time, the maxillary sinus, also called the maxillary sinus, is one of the paranasal sinuses, a pair of cavities in the upper jawbone, which is filled with air. Accordingly, the first image data can be obtained by selectively extracting voxels having a value of -1024 or less, which is the CT coefficient corresponding to air, around the position of the fixture arranged corresponding to the tooth loss region in the volume image.

The fixture area remover 40 obtains the second image data in which the area overlapping with the area required for fixture placement in the maxillary sinus area is removed. At this time, the area required for the fixture is an area extending a predetermined distance from the boundary of the fixture disposed in the image through the placement simulation unit 20. [ As described above, the region extending from the fixture boundary corresponds to the portion requiring bone grafting in order to support the fixture to be placed, and the length extending along the diameter, length, or the like of the fixture may be different.

The bony food calculating unit 50 obtains the third image data by removing the area where the second image data from which the fixture is to be placed is removed from the first image data of the maxillary sinus area, The amount of bone graft to be transplanted at the time of performing maxillary sinus lift is quantitatively calculated.

As described above, the implant plan planning apparatus 100 according to the embodiment of the present invention calculates and provides the bone implantation amount during the implant procedure including the maxillary and maxillofacial lift, thereby reducing the burden on the user for determining the bone implantation amount, .

Meanwhile, the maxillary sinusoidal extraction unit 30, the fixture area elimination unit 40, and the bone morphological calculation unit 50 associated with the above-described performing of the sinusoidal elevation simulation require the sinusoidal elevation according to the result of the placement simulation unit 20 Only activated selectively.

The simulation of the maxillary sinus elevation can be performed on the basis of the user's sinusoidal elevation simulation execution instruction inputted through the user interface unit 10 or based on the position of the fixture on which the placement simulation unit 20 is placed, The bone thickness and the bone density to be implanted are determined and it is determined whether or not to perform the automatic determination by directly determining whether the maxillary and maxillofacial lift is necessary according to a predetermined criterion.

2 is a flow chart of an implant procedure planning method accompanied by a maxillary and maxillofacial lift according to an embodiment of the present invention. Hereinafter, the organic operation of the above-described structure of the implant planning apparatus 100 will be described with reference to FIG.

In order to establish the implant placement plan, it is necessary to acquire the medical image of the patient, reconstruct the acquired medical image, and perform image processing such as image matching.

A process for simulating the placement of the implant object is performed by placing an implant object including a fixture at a position where implantation of the volume image is established and the teeth are lost and the implant is required to be placed on the image (S10 ).

Arrangement of the implant object may be performed directly on the 3D volume image, but may be performed on the reconstructed image of the 3D volume image such as the 2D sectional image on the 3D volume image. Meanwhile, the placement of the implant object may be based on user input through the user interface unit 10, but may be automatically performed according to a predetermined criterion by detecting the position and size of the tooth loss region through image processing. It is needless to say that the correction through the user input can be performed even when it is performed automatically.

If the fixture placed on the image is positioned below the maxillary sinus and the bone thickness around the fixture is thinner than the fixture length, it is determined that the fixture invades the maxillary sinus through the above-described steps (S20). Then, a space for implanting the maxillary sinus Simulations of the maxillary and mandibular grafts implanting bone are followed.

The procedure of the simulation for the maxillary sinus elevation is as follows. First, the first image data is obtained by extracting the region of the maxillary sinus requiring bone graft for the fixation from the head and neck volume images (S30).

3 is a reference diagram for explaining a method of acquiring first image data from a volume image.

Referring to FIG. 3, the first image data is obtained from the volume image before the implant object is placed, and is an image for the maxillary sinusoidal region 301. The first image data may be obtained by performing surface rendering on the maxillary sinus area 301 extracted from the 3D volume image.

Next, the second image data is obtained by removing the area overlapping with the area required for the fixture from the maxillary sinus area (S40).

4 is a reference diagram for explaining a method of acquiring second image data from a volume image.

4, in the maxillary sinus partial region 403 in which the region overlapping with the region R required for the placement of the fixture F in the maxillary sinus region of the volume image in which the fixture F as the implant object is disposed is removed, The second image data is acquired. The second image data may be acquired through surface rendering as the first image data.

At this time, the area R required for the placement of the fixture F is a hatched area in FIG. 4, which is a region extending a predetermined distance from the boundary of the fixture F. In FIG. 4, it can be seen that the area extended by a corresponds to the area to which the bone is to be implanted to support the fixture F. On the other hand, since the area required for support varies depending on the type of fixture, the extension length of the area extending from the boundary of the fixture F, such as a, differs according to a standard previously prepared on the basis of the diameter and length of the fixture .

As a result, the second image data corresponds to the image of the volume of the maxillary sinus to be deformed due to bone grafting according to the maxillary sinus lift.

Thereafter, in step S50, a bone meal is calculated on the basis of the first image data obtained through the above-described steps and the third image data, which is a difference between the areas based on the second image data. The third image data is an image corresponding to a region where a bone is implanted in a maxillary and maxillofacial lift.

5 is a reference diagram for explaining the acquisition of the third video data. 5, the third image data from which the area overlapping with the area 403 of the second image data is removed from the area 301 of the first image data is obtained, and the area R corresponding to the third image data is obtained. The bone meal is calculated based on the volume of the bone (S50).

The acquired third image data is provided through the user interface unit 10 so that the user can adjust the image of the bone image. At this time, the third image data is matched with the first image data or the second image data Thereby helping the user to understand. The user can modify the position of the fixture or change the distance extending from the boundary of the fixture as in Fig. 4, and the implant plan planning device 100 can change the position of the changed fixture and / It will be possible to recalculate and provide the amount.

As described above, according to the implant planning apparatus 100 and method according to the present invention, the simulation for the maxillary and mandibular lift is linked to the placement simulation function provided by the conventional implant procedure plan program, thereby minimizing the side effects of the maxillary and mandibular lift , And can reduce planning variance to support planning for more successful implant procedures.

Meanwhile, the implant procedure planning method involving the maxillary and maxillofacial lift according to the embodiment of the present invention may be embodied in various recording media such as a magnetic storage medium, an optical reading medium, and a digital storage medium, by being made into a program that can be executed by a computer.

Implementations of the various techniques described herein may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or combinations thereof. Implementations may be implemented in a computer program product, such as an information carrier, e.g., a machine readable storage device, such as a computer readable storage medium, for example, for processing by a data processing apparatus, Apparatus (computer readable medium) or as a computer program tangibly embodied in a propagation signal. A computer program, such as the computer program (s) described above, may be written in any form of programming language, including compiled or interpreted languages, and may be stored as a stand-alone program or in a module, component, subroutine, As other units suitable for use in the present invention. A computer program may be deployed to be processed on one computer or multiple computers at one site or distributed across multiple sites and interconnected by a communications network.

Processors suitable for processing a computer program include, by way of example, both general purpose and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The elements of a computer may include at least one processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer may include one or more mass storage devices for storing data, such as magnetic, magneto-optical disks, or optical disks, or may receive data from them, transmit data to them, . &Lt; / RTI > Information carriers suitable for embodying computer program instructions and data include, for example, semiconductor memory devices, for example, magnetic media such as hard disks, floppy disks and magnetic tape, compact disk read only memory A magneto-optical medium such as a floppy disk, an optical disk such as a DVD (Digital Video Disk), a ROM (Read Only Memory), a RAM , Random Access Memory), a flash memory, an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and the like. The processor and memory may be supplemented or included by special purpose logic circuitry.

While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various device components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and devices will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: user interface unit 20: placement simulation unit
30: Maxillary sinusoidal extractor 40: Fixed area removal
50:

Claims

In a method for planning an implant procedure involving a maxillary sinus lift through simulation,
Acquiring first image data of a maxillary sinus area by extracting a maxillary sinus area from a volume image;
Obtaining second image data by removing a region overlapping with a region required for placement of a fixture in the maxillary sinus region;
Obtaining third image data by removing an area overlapping the second image data in the first image data; And
And calculating a bone graft based on the volume of the region according to the third image data.

The method according to claim 1,
Further comprising a placement simulation step of arranging at least one implant object including a fixture on the volume image to construct an implant,
Wherein the area required for placement of the fixture in the step of acquiring the second image data is determined and extended by a predetermined distance from the boundary of the fixture disposed through the placement simulation.

The method according to claim 1,
Further comprising the step of determining whether to perform the maxillary sinus lift based on the result of the placement simulation of placing the implant object constituting the implant on the volume image.

The method according to claim 1,
Wherein the acquiring of the first image data comprises:
And extracting voxels corresponding to the CT number (CT number) corresponding to the region of the maxillary sinus on the volume image.

A computer-executable recording medium on which a program for executing an implant treatment planning method according to any one of claims 1 to 4 is recorded.

A device for planning an implant procedure involving a maxillary sinus lift through simulation,
A maximal sinusoidal extracting unit for extracting a sinusoidal region from a volume image and acquiring first image data for the sinusoidal region;
A fixture area removal unit that obtains second image data in which an area overlapping with a region required for placement of a fixture in the maxillary sinus area is removed; And
Wherein the bone grafting unit calculates the bone grafting amount based on the volume of the region corresponding to the third image data in which the region overlapping the second image data is removed from the first image data.

The method according to claim 6,
Wherein the maxillary sinusoidal extractor and the fixture area eliminator perform surface rendering to obtain the first image data and the second image data.

The method according to claim 6,
Further comprising: a placement simulation unit for virtually generating an implant object constituting the implant and arranging the implant object in the volume image,
Wherein the fixture area elimination unit grasps a region required for placement of the fixture based on the placement result by the placement simulation unit.