KR101554158B1 - method for manufacturing surgical guide of dental implant using cloud system - Google Patents

Abstract

 In order to reduce the time consumed in the manufacture of the surge guide, the present invention is characterized in that an oral scan image including an object tooth to be extracted is obtained by orally scanning an inside of the mouth of the subject, A second step of selecting and inputting a boundary region of the extraction target tooth in the obtained ORAL scan image and setting a removal target portion corresponding to the extraction target tooth on the basis of the input boundary region; And a third step of obtaining design information for manufacturing a surge guide having a guide hole formed along a position corresponding to the removal target portion and having a fixing groove portion formed in the oral cavity, And selecting and inputting a plurality of boundary points along a boundary line between the extraction target tooth and the inside of the oral cavity adjacent to the extraction target tooth.

Description

TECHNICAL FIELD The present invention relates to a method of manufacturing a surgical guide for a dental implant,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for manufacturing a surge guide for a dental implant, and more particularly, to a method for manufacturing a surge guide for a dental implant.

Generally, an implant refers to a substitute for replacing a human tissue when the original human tissue is lost, but refers to implanting an artificial tooth in the dentistry. To replace the missing tooth root, a fixture made of titanium or the like which has no rejection to the human body is planted in the alveolar bone that has been taken out of the tooth, and then the tooth is restored by fixing the artificial tooth.

The implant procedure consists of forming a hole in the alveolar bone, placing the fixture, and then combining the abutment and the crown to the fixture. Here, the procedures for forming the perforations and the procedure for placing the fixtures differ from patient to patient, and the position, orientation, and depth of the implant are determined in consideration of various factors such as the state of the alveolar bone of the patient and the position of the tooth requiring the implant .

As a result, it is difficult to precisely measure the depth and direction of the procedure, not only for the novice who does not have experience of the operation, but also for the experienced person.

Recently, a surgical guide has been made by using 3-D image obtained through CT scan and oral scan of the patient's mouth and perforation drilling and fixture placement using a surge- An assisted method is used.

Here, the surge guide acquires a CT image and an oral scan image of the inside of the subject's mouth, establishes an implant procedure plan based on the result of matching the two images, and manufactures do.

Then, the perforation is drilled on the alveolar bone of the recipient based on the manufactured surge guide, and a fixture is selected according to the type of tooth corresponding to the position of the perforation. That is, a fixture having various depths and thicknesses is provided according to the function of the teeth, and a fixture suitable for the bone amount of the alveolar bone is selected and placed.

However, in the prior art, when a tooth of an operation part is removed and an image of the inside of the mouth of the subject is removed while the teeth are removed, a surgeon guide and a crown are manufactured based on the image.

Accordingly, there has been an inconvenience in that a surgeon's guide and a crown are manufactured after the procedure of removing the teeth, and the user must live in an extracted state until the procedure of replacing the removed tooth is completed.

Particularly, since the implant part can provide a cosmetic discomfort in the anterior part and the correct pronunciation is also difficult, there is a problem that a woman who is interested in her appearance or an office worker who has a lot of interpersonal relationship can not perform her daily life or work normally .

Korean Patent No. 10-0693806

In order to solve the above problems, a method for manufacturing a surge guide for a dental implant, in which time consumed in manufacturing a surge guide is significantly reduced, is provided.

According to an aspect of the present invention, there is provided an oral care apparatus comprising: a first step in which an oral scan image including osseous teeth to be extracted is obtained by orally scanning an oral cavity of a subject; A second step of selecting and inputting a boundary region of the extraction target tooth in the obtained ORAL scan image and setting a removal target portion corresponding to the extraction target tooth on the basis of the input boundary region; And a third step of obtaining design information for manufacturing a surge guide having a guide hole formed along a position corresponding to the removal target portion and having a fixing groove portion formed in the oral cavity, And selecting and inputting a plurality of boundary points along a boundary line between the extraction target tooth and the inside of the oral cavity adjacent to the extraction target tooth.

Here, the second step may include calculating a closed surface including a connection line between each boundary point and adjacent boundary points.

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The third step is a step in which the fixture information of the fixture is acquired based on the three-dimensional integrated image obtained by image-matching the CT scan image of the subject's mouth and the oral scan image from which the removal target portion has been removed It is preferable to further include.

The third step may further include acquiring an outer shape of the crown based on the arrangement of the peripheral teeth of the removal target portion.

Through the above-described solution, the method for manufacturing a surge guide for a dental implant according to the present invention provides the following effects.

First, a surge guide installed in the oral cavity of the subject to be treated to guide the various implant procedures is obtained on the basis of the oral scan image in which the subject to be removed is removed without removing the subject to be extracted, Since it can be prepared in the previous step of removing the teeth, it can provide the foundation technology to complete the fixture, abutment and crown installation at the same time as the extraction.

Secondly, since the contour of the crown is set along the space between the adjacent teeth of the object to be removed by using the original scan image from which the object to be removed is removed, a crown suitable for a space to be formed between the surrounding teeth after extraction is accurately designed and manufactured, Since the crown was manufactured in the pre-extraction stage, the installation of simultaneous crown with the extraction can be completed, thereby eliminating the inconvenience of daily life such as deterioration of appearance due to extraction and minimizing side effects such as deformation of the teeth due to extraction and weakening of the root .

Third, the object to be removed may not be determined by analyzing the entire outer surface of a real tooth having a complicated profile such as a curved surface or a folded surface, but may be a closed surface formed by a connecting line connecting the boundary point set in the characteristic portion of the tooth to be extracted and the boundary point The amount of computation for image processing is reduced, so that an oral scan image from which an extraction target tooth has been removed can be acquired quickly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart illustrating a method for fabricating a surgical guide for dental implants according to an embodiment of the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a surgical guide for dental implants.
3 is an exemplary view showing an oral scan image in which an extraction target tooth is removed in a method for manufacturing a surge guide for a dental implant according to an embodiment of the present invention.
4 is a view illustrating an oral scan image in which an extraction hole is removed in a method for manufacturing a surgeal guide for a dental implant according to an embodiment of the present invention.

Hereinafter, a method for manufacturing a surge guide for dental implants according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flowchart illustrating a method of manufacturing a surge guide for dental implants according to an embodiment of the present invention. FIG. 2 is a view illustrating an example of an oral scan image in a method of manufacturing a surge guide for dental implants according to an embodiment of the present invention. FIG. 3 is an exemplary view showing an oral scan image in which a tooth to be extracted is removed in a method for manufacturing a surgeal guide for a dental implant according to an embodiment of the present invention, and FIG. 4 is a cross- FIG. 8 is an illustration showing an oral scan image in which an extraction hole is removed in a method of manufacturing a surgical guide for an implant. FIG.

Here, the implant treatment refers to a procedure for replacing a lost tooth with an artificial prosthesis. The prosthesis includes a crown replacing a crown, a fixture replacing a root, and an abutment connecting a crown and a fixture.

At this time, the perforation is formed in the alveolar bone through drilling using an auxiliary device called a surgical guide, the fixture is placed in the formed hole, and the abutment and the crown are connected to the fixture, Lt; / RTI >

Here, the surge guide serves to accurately guide the direction, position, and depth of drilling when drilling.

As shown in FIGS. 1 to 4, a method for manufacturing a surge guide for a dental implant according to an embodiment of the present invention comprises the following steps.

First, an oral scan image including an extraction target tooth is obtained by orally scanning the oral cavity of the subject (step s10). Here, the tooth 3 to be extracted refers to a tooth of a treatment part desired by the client, among the parts requiring implant treatment, and may be set to one or a plurality of teeth.

Preferably, the oral scan image 100 is obtained in a state where the extraction target tooth has not been removed from the oral cavity of the subject. Here, the oral scan image 100 can provide information on the shape of the crown portion of the exposed teeth and the shape of the gum around the teeth.

At this time, the oral scan image 100 can be obtained by directly scanning the interior of the subject's mouth through an oral scanner or the like. Of course, it can also be obtained by scraping the plaster model created through embossing of the wearer's mouth or the impression model of the impression model, and the scan image of the impression model can be inverted and acquired as an oral scan image.

Preferably, the step of acquiring the ultrasound scan image further includes acquiring a CT scan image of the inside of the subject's mouth, wherein the ultrasound scan image and the CT scan image are acquired in the oral cavity of the crown or the recipient Based on the reference markers provided in the first and second display areas.

Here, the CT image can provide information on the internal tissues such as the crown of the tooth (the upper side of the teeth appearing outside the gums), the root (the lower side of the teeth joined with the alveolar bone in the inside of the gum), and the alveolar bone.

In order to improve the accuracy of the implant procedure, comprehensive information on the external and internal tissues of the teeth is required. The bone mass, bone density, distribution, and the like of the alveolar bone are measured by using the three-dimensional integrated image obtained through the matching of the oral scan image and the CT- And the thickness of the gums for each part of the alveolar bone.

Meanwhile, when the oral scan image is acquired (s10), the boundary region of the extraction target tooth is selected and inputted to the obtained oral scan image (s20).

Here, the boundary region of the tooth to be extracted may be entered manually by a doctor or an interpreter of the individual dentist, and the position of the tooth to be extracted may be inputted as a three-dimensional coordinate or an anatomical position, It is also possible to input automatically.

When a boundary region of the extraction target tooth is selected (s20), a removal target portion corresponding to the extraction target tooth is set and removed based on the input boundary region (s30).

Here, it is preferable that the removal subject portion is set as an area that can represent the extraction subject tooth. Therefore, when the extraction subject tooth is removed from the inside of the mouth of the patient, based on the oral scanning image 110 from which the removal subject portion has been removed The state can be expected.

Thereafter, when the oral scan image 110 from which the removal target portion has been removed is obtained (S30), a guide hole is formed along the position corresponding to the removal target portion, and a surge guide having a fixing groove portion (S40).

Specifically, a surface of the surge guide is formed with a fixing groove portion formed in the inner surface profile of the subject, and the surge surface guide can be stably fixed to the inside of the mouth of the subject.

Further, in the state where the surgeal guide is fixed, a subsequent implant procedure such as forming a hole in the alveolar bone using the guide hole or inserting a fixture into the hole may be performed.

At this time, the step (s40) of obtaining the design information of the surge guide is based on the three-dimensional integrated image obtained by image-matching the CT scan image of the inside of the mouth of the subject and the ORAL scan image from which the removal target portion has been removed It is preferable that the step of obtaining the fixture information of the fixture is further included.

Here, the design information may include the shape information of the fixing groove, the position information of the guide hole, the depth of the guide hole, or the thickness of the periphery of the guide hole.

In detail, the three-dimensional integrated image is composed of the tissue information of the crown, root, alveolar bone, and the like included in the CT image, and the information of the appearance of the crown and the gums included in the oral scan image are matched based on the crown, Information can be provided.

In this case, the setting information of the fixture is preferably understood to include the position, depth, direction, diameter, and the like of the fixture.

That is, comprehensive information on the interior of the oral cavity contained in the three-dimensional integrated image can be analyzed to analyze the bone mass, shape, positional relationship between the alveolar bone and the gum, and the like, The diameter, the direction, the position, and the depth of the fixture can be calculated.

Accordingly, the surgeon guide can be precisely manufactured to reflect the state of the alveolar bone or the teeth of the recipient, and the implant implant treatment using the surgeal guide can be more stably performed.

For example, the shape information of the fixing groove portion may be set through the external profile of the gum and tooth of the subject who is represented in the three-dimensional integrated image obtained through the matching of the oral scan image or the oral scan image and the CT shot image have.

The position, direction, diameter, depth, and the like of the perforation corresponding to the fixture can be calculated when the fixture information is calculated by analyzing the alveolar bone displayed on the lower (lower) or upper (upper) .

At this time, the positional information of the guide hole can be calculated according to the positional relationship between the surge guide fixed by the fixing groove in the oral cavity of the subject and the perforation, and the thickness of the peripheral portion of the guide hole is set according to the depth of perforation .

The shape information of the fixing groove, the position information of the guide hole, the thickness of the circumference of the guide hole, and the like can be synthesized as the design information, and the design guide can be manufactured as the design information is linked to the manufacturing system.

As described above, the surgeal guide for guiding various implants is mounted on the inside of the mouth of the subject based on the oral scan image acquired without removing the extraction target teeth, It is possible to provide an underlying technique by which the fixture, abutment, and crown can be installed at the same time as removing the tooth to be extracted.

That is, it is possible to install a surgeal guide prepared in advance in the state where a fixture, an abutment, or a crown to be placed in place of the tooth to be extracted is prepared or prepared in the inside of the mouth of the client, By guiding the various procedures after the drilling, the fixture, abutment, and crown can be installed at the same time as the extraction.

Therefore, the inconvenience of everyday life such as appearance deterioration due to extraction can be eliminated, so that the burden on the implant treatment can be significantly reduced and the satisfaction of the treatment recipient can be increased.

The step (s20) of setting the boundary area of the tooth to be extracted may include a step of setting a plurality of boundary points (4) along the boundary between the extraction subject tooth (3) and the oral cavity (1, And a step of selecting and inputting the data.

In this case, the term " inside the oral cavity adjacent to the extraction target tooth " is understood to mean the peripheral teeth 2 disposed on both sides of the extraction target tooth and the gum 1 connected to the extraction target tooth.

Here, the boundary point 4 for setting the boundary area of the extraction target tooth 3 may be manually input by a physician or a prosthetist, or may be input automatically through a separate image processing program.

For example, the automatic input through the image processing program can be performed by converting the image of the portion set as the tooth to be extracted to black and white, analyzing the degree of shadow of each portion, and generating the boundary point at a portion where the degree of shadow is higher than a predetermined value .

And adjusting the transparency of the original scan image, rotating the original scan image three-dimensionally, and inputting the boundary points along the boundary between the extraction target tooth 3 and the inside of the surrounding oral cavity.

At this time, each of the boundary points 4 can be generated or inputted along the front and rear side lines, the upper side lines, the to-be-extracted teeth and the front and rear lower lines which are the boundary line between the gums, which are the boundary line between the peripheries of the tooth to be extracted and the tooth to be extracted have.

As described above, the boundary area of the tooth 3 to be extracted is not determined by analyzing the entire outer surface of the actual tooth having a complicated profile such as a curved surface / a folded surface, And can be set accurately and simply and quickly so as to represent the actual tooth to be extracted.

Also, since a large number of orally scanned images integrated and managed on the manufacturer side are quickly processed, the time required for a manufacturer to obtain design information for manufacturing a surge guide and to complete production of a substantial product can be significantly reduced.

Meanwhile, step (s30) of setting the removal target part based on the boundary area includes calculating the closing surfaces 4b and 4c including the connecting line 4a between the respective boundary points and the adjacent boundary points Do.

At this time, the connection line 4a connects between two adjacent boundary points, and each boundary point can be connected to two adjacent boundary points.

When the respective boundary points are connected to each other, the connection line 4a is provided between the closed face 4c for partitioning between the tooth 3 to be extracted and the surrounding tooth 2, the tooth 3 to be extracted and the gum 1 The closing surface 4b for partitioning can be formed.

At this time, it is possible to remove the image corresponding to the tooth 3 to be extracted in the oral scan image with reference to the closed surfaces 4b and 4c.

That is, when the boundary area is set through the boundary point 4, the closing surfaces 4b and 4c including the boundary area are calculated, and the closing surfaces 4b and 4c of the closing surfaces 4b and 4c in the original scanning image 100 are calculated. The portion corresponding to the upper portion (in the case of the mandible) to the lower portion (in the case of the upper portion) can be set and removed.

The connection line 4a connecting the boundary point 4 set in the characteristic portion of the tooth to be extracted and the boundary point is not set by analyzing the entire outer surface of the tooth having the complicated profile such as the curved surface / The amount of computation for image processing is reduced, and thus the oral scan image 110 from which the extraction target teeth are removed can be acquired quickly.

Meanwhile, the step (s30) of setting and removing the removal target portion corresponding to the extraction target tooth on the basis of the input boundary region is performed in the step (s30) of removing the common area between the one side region of the closing surfaces 4b and 4c and the And setting the removal target portion as the removal target portion.

Here, the term " one side region " is understood to mean an upper region when the tooth to be extracted is a mandible, and a lower region when the extracted tooth is an upper body.

In detail, when the closed surfaces 4b and 4c are calculated, the three-dimensional coordinates of the closed surfaces 4b and 4c are used to define the upper side (in the case of the mandible) An area extended to the lower side (in the case of the maxilla) can be set.

At this time, the oral scan image and the closed surfaces 4b and 4c may have the same three-dimensional coordinate system, and a portion included in one side region of the closed surfaces 4b and 4c among the three- Can be calculated as a common area.

Accordingly, instead of removing the image corresponding to the tooth to be extracted in the oral scan image by using a complicated three-dimensional image processing algorithm, a simple process of comparing the respective three-dimensional coordinates and eliminating the overlapped coordinates, The image corresponding to the extraction target tooth can be removed from the image, so that the image processing process can be performed more quickly.

The step (s30) of setting and removing the removal target portion corresponding to the extraction target tooth based on the input boundary region may further include removing the image corresponding to the extraction hole of the extraction target tooth .

Here, the extraction hole means a hole formed in the gum or alveolar bone after extraction due to the tooth root.

In detail, the sleeve for supporting the outer periphery of the drilling device is inserted into the guide hole of the surge guide. When the sleeve is mounted so as to protrude from the lower part of the surge guide (during mandibular operation) to the upper part The direction of the apparatus can be more accurately guided, and the protruding height of the sleeve can be set corresponding to the extraction hole.

At this time, a depression (4d) is set to a predetermined depth from the center of the portion (4b) corresponding to the boundary with the gum among the closed surfaces (4b, 4c), and the depression (4d) (4b) corresponding to the extraction hole (4b) can be removed as an image corresponding to the extraction hole.

Accordingly, the protrusion height of the sleeve can be accurately set by using the original scan image 120 from which the image corresponding to the extraction hole is removed, and the guidance of the implant operation through the surge guide can be more accurately performed.

It is preferable that the step of acquiring design information for manufacturing the surge guide further comprises obtaining an outline of the crown based on the arrangement of the peripheral teeth 2 of the removal target portion.

Here, the shape of the chewing surface can be set according to the kind of tooth, that is, a molar, a minuscule, a canine, a canine, an incisor or the like, and the volume of the crown can be set according to the space between both sides of the tooth to be extracted and the upper and lower peripheral teeth 2 Can be set.

At this time, the outer shape of the crown can be automatically set according to the set volume and the set volume, and can be set by manual operation of the dental worker taking into account the type and volume of the teeth.

Then, when the outer shape of the crown is set, the set outer shape can be converted into three-dimensional vector information and transmitted to the manufacturing system to be manufactured.

Since the contour of the crown is set along the space between the adjacent teeth of the object to be removed by using the original scan image from which the object to be removed is removed, a crown suitable for the space to be formed between the surrounding teeth after the extraction can be accurately designed and manufactured .

In addition, since the crown was manufactured in the pre-extraction stage and the fixture, abutment, and crown can be installed at the same time as the extraction, the inconvenience of daily life such as appearance deterioration due to extraction is eliminated, And the satisfaction of the patient with the procedure can be increased.

In addition, since the delay time until the crown is placed after the extraction is substantially eliminated, side effects such as deformation of the teeth due to extraction and weakening of the root can be minimized.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And such modifications are within the scope of the present invention.

100, 110, 120: Oral scan image 1: Gums
2: surrounding teeth 3: extracted tooth
4: boundary point 4a: connection line

Claims (5)

A first step in which an oral scan image including an object tooth to be extracted is obtained by orally scanning the oral cavity of the subject;
A second step of selecting and inputting a boundary region of the extraction target tooth in the obtained ORAL scan image and setting a removal target portion corresponding to the extraction target tooth on the basis of the input boundary region; And
And a third step of obtaining design information for manufacturing a surge guide having a guide hole formed along a position corresponding to the removal target portion and having a fixing groove portion formed in the oral cavity,
Wherein the second step includes the step of selecting and inputting a plurality of boundary points along a boundary between the extraction target tooth and the inside of the oral cavity adjacent to the extraction target tooth. delete The method according to claim 1,
Wherein the second step includes calculating a closed surface including a connection line between each boundary point and adjacent boundary points. ≪ RTI ID = 0.0 > 8. < / RTI > The method according to claim 1,
The third step further includes the step of acquiring the fixture placement information based on the three-dimensional integrated image obtained by image-matching the CT scan image of the subject's mouth and the oral scan image from which the removal target portion has been removed Wherein the method comprises the steps of: The method according to claim 1,
Wherein the third step further comprises obtaining an outer shape of the crown based on the peripheral tooth arrangement of the removal target portion.

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