KR20240074201A - Manufacturing method of surgical guide appataus for implant removal - Google Patents

Abstract

One embodiment of the present invention includes a step of acquiring image data for the oral cavity, a design step of designing a surgical guide for implant removal in which a guide hole matching the concentricity of the implant is formed, and a molding step of molding the surgical guide for implant removal. It provides a method of manufacturing a surgical guide for implant removal, including.

Description

Surgical guide manufacturing method for implant removal {MANUFACTURING METHOD OF SURGICAL GUIDE APPATAUS FOR IMPLANT REMOVAL}

The present invention relates to a method of manufacturing a surgical guide for implant removal, and more specifically, to a method of manufacturing a surgical guide for implant removal that can guide the position or direction of an implant removal device used to remove an installed implant. will be.

In general, an abutment assembly refers to an artificial replacement that is constructed to reproduce the same form and function as a natural tooth. An implant made of titanium that imitates the root shape of a natural tooth to be installed in the alveolar bone with threads formed on the outer circumferential surface. It includes an abutment connected to and installed on top of the implant and an artificial tooth coupled thereto, and a fixing screw for fixing the implant and the abutment to each other.

To briefly explain the abutment assembly procedure, first, an incision is made in the gingiva of the recipient to expose the alveolar bone. Next, a location for inserting the implant among the exposed alveolar bone is determined, and a portion of the alveolar bone is removed at the location using a drilling tool such as a drill device to form a hole into which the implant will be placed. Thereafter, the implant installation is completed by placing an abutment assembly including the implant and abutment in the formed hole and covering the gingival area.

On the other hand, in the case of necrosis of the alveolar bone due to excessive torque during the implant placement process, or if the implant is inserted into the alveolar bone and successfully osseointegrated with the bone, inflammation occurs around the implant over time, resulting in loss of bone around the implant. Because of this, there are cases where the implant must be removed or separated from the alveolar bone when it can no longer be maintained.

In the above case, conventionally, as shown in FIG. 1 (a), a connection screw (2a) is screwed to the threaded portion of the inner peripheral surface of the implant 10, and a removal driver (2) is coupled to the connection screw (2a). , the implant (10) was separated from the alveolar bone (1) by rotating the removal driver (2). However, if torque is applied while the concentricity of the connection screw (2a) and the implant (10) is not aligned, not only will the rotational force of the removal driver (2) and the connection screw (2a) not be properly transmitted, but also the connection screw (2a) ) was at risk of fracture.

In addition, conventionally, as shown in Figure 1 (b), a procedure of removing the implant 10 after removing the alveolar bone 1 around the implant 10 using a trefine drill 3 was also used. . However, if the tree fine drill (3) is driven while the concentricity of the tree fine drill (3) and the implant (10) does not match, fragments of the implant (10) remain in the alveolar bone (1) or the tree fine drill (3) ) There was a risk of fracture.

The present invention is intended to solve the problems of the prior art described above, and the purpose of the present invention is to provide a method of manufacturing a surgical guide for implant removal that can maintain the concentricity of the implant removal device and the implant during the implant removal procedure.

One aspect of the present invention includes a step of acquiring image data for the oral cavity, a design step of designing a surgical guide for implant removal in which a guide hole matching the concentricity of the implant is formed, and a molding step of molding the surgical guide for implant removal; It provides a method of manufacturing a surgical guide for implant removal, including.

In one embodiment, in the image data acquisition step, 3D scanning image data inside the oral cavity may be acquired.

In one embodiment, in the image data acquisition step, when a crack occurs in the implant, the first scan body, which has a polygonal-shaped protrusion at the bottom, can be scanned by fastening it to the polygonal groove-shaped connection part of the center hole of the implant.

In one embodiment, in the image data acquisition step, if the upper portion of the implant is fractured, the second scan body, which has a male threaded portion at the lower portion, can be fastened to the inner peripheral threaded portion of the central hole of the implant to scan.

In one embodiment, in the image data acquisition step, CT image data about the structure of the oral cavity may be additionally acquired.

In one embodiment, in the image data acquisition step, 3D scanning image data of the inside of the oral cavity and CT image data of the structure of the oral cavity may be merged.

In one embodiment, the inner diameter of the guide hole may be greater than or equal to the outer diameter of at least one of a removal driver, a tree fine drill, and an implant installation drill.

According to one aspect of the present invention, the concentricity of the removal driver, connection screw, and implant is aligned along the guide hole of the surgical guide for implant removal, so that the rotational force of the removal driver and connection screw is properly transmitted and the implant is removed without the risk of fracture of the connection screw. can be removed.

In addition, since the concentricity of the tree fine drill and the implant is aligned along the guide hole of the surgical guide for implant removal, damage to the bone tissue around the implant can be minimized, and fragments of the implant may not remain in the alveolar bone or fracture of the tree fine drill. The implant can be removed without risk.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Figure 1 is a diagram showing a conventional device for removing an implant.
Figure 2 is a cross-sectional view of an implant according to an embodiment of the present invention.
Figure 3 is a plan view of a scan body according to various embodiments of the present invention.
Figure 4 is a step diagram showing a method of manufacturing and using a surgical guide for implant removal according to an embodiment of the present invention.
Figure 5 is a diagram schematically showing a method of manufacturing and using a surgical guide for implant removal according to an embodiment of the present invention.
Figure 6 is a diagram schematically showing a method of manufacturing and using a surgical guide for implant removal according to another embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the attached drawings. However, the present invention may be implemented in various different forms and, therefore, is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts unrelated to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

Throughout the specification, when a part is said to be “connected” to another part, this includes not only cases where it is “directly connected,” but also cases where it is “indirectly connected” with another member in between. . Additionally, when a part is said to “include” a certain component, this does not mean that other components are excluded, but that other components can be added, unless specifically stated to the contrary.

As used herein, terms containing ordinal numbers such as 'first' or 'second' may be used to describe various components or steps, but the components or steps should not be limited by the ordinal numbers. . Terms containing ordinal numbers should be interpreted only to distinguish one component or step from other components or steps.

Figure 2 is a cross-sectional view of an implant according to an embodiment of the present invention, Figure 3 is a plan view of a scan body according to various embodiments of the present invention, and Figure 4 is a surgical guide for implant removal according to an embodiment of the present invention. It is a step diagram showing the manufacturing method and usage method, and Figure 5 is a diagram schematically showing the manufacturing method and usage method of the surgical guide for implant removal according to an embodiment of the present invention.

Hereinafter, a method of manufacturing a surgical guide for implant removal according to a first embodiment of the present invention will be described in detail with reference to FIGS. 2 to 5.

Meanwhile, as shown in FIG. 2, the implant 10 is formed to have the root shape of a natural tooth to serve as a root, and includes an upper portion 10a and a lower portion 10b. In detail, a central hole 11 is formed in the center of the implant 10, and a threaded portion 12 on the inner peripheral surface is installed in the central hole 11 of the lower portion 10b.

A threaded portion 13 is formed on the outer peripheral surface of the implant 10, and the implant 10 is inserted and coupled to the inside of the alveolar bone. A polygonal groove-shaped connecting portion 14 is installed in the central hole 11 of the upper portion 10a. The polygonal groove is not limited to the hexagonal groove shape, and may be formed in the form of a square groove, an octagonal groove, or a torx groove.

Hereinafter, the implants 20 and 30 will be given similar symbols to the implant 10, and detailed description thereof will be omitted.

Meanwhile, as shown in FIG. 3, the scan bodies 4a and 4b of the implant are a first scan body 4a fastened to the connection part 14 of the implant and a second scan body fastened to the inner peripheral thread part 12 ( It can be divided into 4b).

A flat portion 4a1 may be formed on the first scan body 4a to calculate the inserted direction value of the scan body. The lower part of the first scan body 4a is provided with a polygonal protrusion 4a2 corresponding to the polygonal groove of the connection part 14, so that when the first scan body 4a is inserted into the implant 10, the first scan is performed. The protrusion 4a2 of the body 4a may be fastened to the connection portion 14. Additionally, a through hole is formed in the longitudinal center of the first scan body 4a, and a fixing screw can pass through the through hole and be fastened to the threaded portion 12 on the inner peripheral surface of the implant 10.

A flat portion 4b1 may be formed on the second scan body 4b to calculate the inserted direction value of the scan body. The lower part of the second scan body 4b is provided with a male threaded portion 4b2 that is fastened to the threaded portion 12 on the inner peripheral surface of the implant 10.

For example, the male thread portion 4b2 may extend from the lower part of the second scan body 4b and be formed integrally with the second scan body 4b. However, it is not limited to this, and a through hole is formed in the longitudinal center of the second scan body 4b, and the male thread portion 4b2 of the fixing screw passes through the through hole to the lower part of the second scan body 4b. may be exposed. The second scan body 4b can be supported on the implant 10 as the male threaded portion 4b2 is fastened to the inner peripheral threaded portion 12 of the implant 10.

When the first and second scan bodies (4a, 4b) are fastened to the implant (10) and scanned with an oral scanner, a three-dimensional scanned image containing positional information such as the directionality and tilt angle of the implant (10) can be obtained. there is.

The method of manufacturing a surgical guide for implant removal according to the first embodiment of the present invention relates to a method of manufacturing a surgical guide for implant removal used when removing an implant 20 with a portion of the outer peripheral surface damaged, comprising the image data acquisition step (S110) ), a design step (S120) of designing a surgical guide for implant removal in which a guide hole matching the concentricity of the implant is formed, and a molding step (S130) of molding the surgical guide for implant removal.

First, in the image data acquisition step (S110), 3D image data inside the oral cavity and image data about the structure of the oral cavity are acquired.

In detail, in the image data acquisition step (S110), the positions of the scan bodies 4a and 4b with respect to the implant 20 are set, and the set positions can be extracted as 3D scan data by scanning with an oral scanner, From this, 3D scan data within the oral cavity can be obtained. 3D scan data may include data on the height, width, dentition, occlusal status of surrounding teeth, and the relationship between the patient's jawbone and surrounding teeth at the location where the implant is to be removed. In particular, the 3D scan data may include information about the location, exact depth, direction, and center coordinate of the implant 20 to be removed.

As in the first embodiment of the present invention, when a crack is formed on a portion of the outer peripheral surface of the upper portion 20a of the implant 20, but the connection portion and the inner peripheral thread portion of the implant 20 function normally, the first scan body 4a ) Alternatively, the second scan body 4b can be fastened to the implant 20.

In addition, in the image data acquisition step (S110), image data about the structure of the oral cavity can be obtained using imaging diagnostic devices such as CT, and by merging the obtained image data about the structure of the oral cavity with the 3D scan data of the oral cavity, It includes 2-dimensional and 3-dimensional internal tissue information about the inside of the patient's mouth.

In other words, the merged image data matches the tissue information such as the crown, tooth root, and alveolar bone included in the CT scan image with the external appearance information of the crown and gums included in the oral scan image based on the crown, providing comprehensive information about the inside of the oral cavity. Since it is possible to provide a more accurate position of the implant 20, etc. can be calculated.

Meanwhile, in the design stage (S120) of designing a surgical guide for implant removal, the image data is provided to CAD/CAM equipment to confirm the positional relationship such as the directionality and tilt angle of the implant 20, and based on this, A surgical guide (100) for implant removal including a support unit (110) that is molded to correspond to the internal shape of the patient's mouth and a treatment unit (120) provided with a guide hole (121) formed coaxially with the implant (20) to be removed. ) is designed.

In detail, as shown in Figure 5(c), the support 110 may be formed to surround the buccal, lingual, and occlusal sides of the tooth. The support 110 may be formed to cover the buccal surface, which is the surface facing the cheek, the lingual surface, which is the surface facing the tongue, and the occlusal surface, which is the surface where teeth come into contact.

Preferably, the support 110 may be formed to match the outer profile of the gums and crown of the patient.

The treatment unit 120 is formed to protrude from the support 110 toward the occlusal surface, and a circular guide hole 121 in the center may be formed to penetrate toward the gingiva. In detail, when the support 110 is installed in the upper jaw, the guide hole 121 is recessed upward, and when the support 110 is installed in the lower jaw, the guide hole 121 is recessed downward. It can be.

The guide hole 121 may be formed to be disposed on the same axis (C) as the implant 20 based on the positional relationship such as the direction and tilt angle of the implant 20 described above. Depending on the number, multiple numbers may be formed. When a plurality of guide holes 121 are formed, the guide holes 121 may be arranged to correspond to each implant 20.

Since it is difficult for a removal device to enter the treatment unit 120 on the posterior tooth side due to a limited opening in the oral cavity, an opening may be formed on the side of the treatment unit 120. In this case, the removal device may enter the guide hole from the side of the treatment unit 120.

The guide hole 121 may be formed to have an inner diameter that can be in contact with the outer peripheral surface of the removal driver 2 or the tree fine drill 3, for example, to guide the entry of the removal device.

The guide hole 121 may be formed to have an inner diameter that can contact the outer peripheral surface of the drill device 5 used when installing the implant 10.

Meanwhile, in the forming step (S130) of forming the surgical guide for implant removal, the surgical guide for implant removal is formed based on the coordinates or images of the three-dimensional outline of the surgical guide for implant removal using the molding unit.

The molding unit can be equipped with a precision CNC processing device or a 3D printer, and can mold the surgical guide 100 for implant removal in response to the support, the external profile and internal profile of the treatment unit, and the position, diameter, and direction of the implant. You can.

Below, the implant removal step (S140) and the implant placement step (S150) using the surgical guide 100 for implant removal will be described in detail.

First, as shown in FIG. 5(c), the support 110 of the surgical guide 100 for implant removal is mounted in the oral cavity to be aligned with the outer surface of the gum.

And, as shown in FIG. 5(d), in the implant removal step (S140), the connection screw 2a is inserted into the guide hole 121 of the treatment unit 120 to remove the inner peripheral thread 22 of the implant 20. and inserting the removal driver (2) into the guide hole (121) to couple the removal driver (2) to the connection screw (2a), and rotate the removal driver (2) to insert the implant (20) into the alveolar bone. Separate from (1).

At this time, the guide hole 121 of the surgical guide 100 for implant removal is designed based on image data obtained through the scan bodies 4a and 4b to be placed on the same axis (C) as the implant 20, The concentricity (C) of the removal driver (2), the connection screw (2a), and the implant (20) coincide with the guide hole (121). Accordingly, the rotational force of the removal driver 2 and the connection screw 2a is properly transmitted to the implant 20, and the implant 20 can be removed without the risk of fracture of the connection screw 2a.

However, it is not limited to this, and the tree fine drill (3) is inserted into the guide hole (121) of the treatment unit (120) to remove the alveolar bone (1) around the implant (20), and then the implant (20) is removed. It's okay too. In this case, the tree fine drill (3) is rotated and supported along the inner periphery of the guide hole (121) and can form a hole in the alveolar bone (1) around the implant (20) in the direction of penetration of the guide hole (121). .

In addition, as shown in FIG. 5(e), in the implant installation step (S150), the surgical guide 100 for implant removal can be used as a surgical guide for implant placement.

For example, if the guide hole 121 of the surgical guide 100 for implant removal is formed in a size corresponding to the outer peripheral surface of the drill device 5 used when installing the implant 10, the guide hole 121 When drilling along the penetration direction, the drill device 5 is rotated and supported along the inner circumference of the guide hole 121, and can accurately guide the formation direction, position, and depth of the hole along the penetration direction of the guide hole 121. there is.

In other words, since removal and placement of the implant can be performed simultaneously with one surgical guide 100, the cost and time required for the implant procedure can be reduced.

Figure 6 is a diagram schematically showing a method of manufacturing and using a surgical guide for implant removal according to another embodiment of the present invention.

Hereinafter, a method of manufacturing and using a surgical guide for implant removal according to a second embodiment of the present invention will be described in detail with reference to FIG. 6.

The parts that overlap with the first embodiment will be omitted, and the second embodiment of the present invention will be described. Identical and similar members are assigned identical and similar symbols, and detailed descriptions thereof are omitted.

The method of manufacturing a surgical guide for implant removal according to a second embodiment of the present invention relates to a method of manufacturing a surgical guide for implant removal used when removing an implant 30 with a fractured connection.

As shown in FIG. 6(b), when the upper part 30a of the implant 30 is fractured and there is no connection part inside the implant 30, the second scan body 4b is connected to the lower part 30b of the implant. ), a three-dimensional image can be obtained by fastening it to the threaded part of the inner circumferential surface.

In addition, as shown in 6(d), in the implant removal step (S240) according to the second embodiment of the present invention, the upper portion 30a of the implant 30 is fractured, making it difficult to use the removal driver 2. Therefore, after inserting the tree fine drill (3) into the guide hole (121) to remove the alveolar bone (1) around the lower part (30b) of the implant (30), the lower part (30b) of the implant (30) can be removed. You can.

At this time, the guide hole 121 of the surgical guide 100 for implant removal is arranged on the same axis (C) as the lower part 30b of the implant 30. Image data obtained through the scan bodies 4a and 4b Since it is designed based on , the concentricity (C) of the tree fine drill (3) and the implant (30) matches. Accordingly, damage to the bone tissue around the lower part (30b) of the implant (30) can be minimized, and fragments of the lower part (30b) of the implant (30) remain in the alveolar bone (1) or fracture of the tree fine drill (3). It is possible to remove the lower portion (30b) of the implant (30) without the risk of damage.

The description of the present invention described above is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. For example, each component described as single may be implemented in a distributed manner, and similarly, components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims described below, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

100 Surgical guide for implant removal
110 support
120 Surgery Department

Claims (7)

Acquiring image data for the oral cavity;
A design step of designing a surgical guide for implant removal in which a guide hole matching the concentricity of the implant is formed; and
A forming step of forming a surgical guide for implant removal; Method for manufacturing a surgical guide for implant removal, including. According to claim 1,
In the image data acquisition step,
A method of manufacturing a surgical guide for implant removal, characterized by acquiring 3D scanning image data inside the oral cavity. According to claim 2,
In the image data acquisition step,
A method of manufacturing a surgical guide for implant removal, characterized in that, when a crack occurs in the implant, the first scan body having a polygon-shaped protrusion at the bottom is fastened to the polygonal groove-shaped connection part of the center hole of the implant and scanned. According to claim 2,
In the image data acquisition step,
A method of manufacturing a surgical guide for implant removal, characterized in that, when the upper part of the implant is fractured, the second scan body, which has a male screw part at the lower part, is fastened to the screw part of the inner peripheral surface of the central hole of the implant and scanned. According to claim 2,
In the image data acquisition step,
A method of manufacturing a surgical guide for implant removal, characterized by additionally acquiring CT image data about the structure of the oral cavity. According to claim 5,
In the image data acquisition step,
A method of manufacturing a surgical guide for implant removal, characterized by merging 3D scanning image data of the inside of the oral cavity and CT image data of the structure of the oral cavity. According to claim 1,
A method of manufacturing a surgical guide for implant removal, characterized in that the inner diameter of the guide hole is greater than or equal to the outer diameter of at least one of a removal driver, a tripe drill, and a drill for implant installation.

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