KR102594603B1 - image correcting jig for manufacturing of dental restoration and image correcting method using thereof - Google Patents

Abstract

In order to improve tooth restoration precision, the present invention includes a first step in which an image correction jig is attached between the molar sides of the dental restoration and the image is captured using an imaging device to obtain a dental restoration image; A second step in which the dental restoration image is transmitted to the planning unit, and a virtual correction jig previously stored in the digital library is extracted and loaded into the planning unit; Scan distortion of the dental restoration image integrally connected with the correction jig image as the comparison information of the correction jig image is virtually moved left and right and forward and backward so that the plurality of comparison information calculated from the correction jig image matches the reference information of the virtual correction jig. A third step in which errors are corrected; and a fourth step of obtaining a corrected scanning image of the dental restoration with the scan distortion error corrected. It provides an image correction method using an image correction jig for manufacturing a dental restoration.

Description

Image correction jig for manufacturing of dental restoration and image correcting method using the same {image correcting jig for manufacturing of dental restoration and image correcting method using the same}

The present invention relates to an image correction jig for manufacturing dental restorations and an image correction method for manufacturing dental restorations using the same. More specifically, it relates to an image correction jig for manufacturing dental restorations with improved tooth restoration precision and an image correction method for manufacturing dental restorations using the same. .

In general, dentures or prosthetics are artificial periodontal tissues in the oral cavity that replace missing natural teeth and artificially restore their appearance and function. At this time, the denture or prosthesis can be installed inside the oral cavity to restore masticatory function and prevent deformation of periodontal tissue. The dentures or prosthetics can be divided into partial/complete dentures and partial/complete prosthesis depending on the number of missing teeth. Additionally, overdentures that compensate for the shortcomings of dentures or prosthetics have recently been disclosed.

Meanwhile, the prosthesis or overdenture is coupled to a fixture installed in the alveolar bone, and the prosthesis or overdenture and the fixture can be connected through a connecting means. At this time, in the case of the prosthesis, the connecting means is provided as an abutment, and in the case of the overdenture, the connecting means is provided as an attachment and a housing cap.

In detail, a plurality of fixtures are installed in the alveolar bone at predetermined positions along the dental arch. Additionally, a coupling portion to which the abutment or attachment is coupled is formed in the prosthesis or overdenture. At this time, in the case of the prosthesis, a coupling groove is formed into which the abutment is inserted and coupled through a screw. In addition, in the case of the overdenture, an embedded groove is formed in which the housing cap coupled with the attachment is embedded and fixed. Here, the coupling groove or the embedded groove must be manufactured to precisely match the position of the fixture.

Then, a temporary prosthesis capable of providing accurate design information of the prosthesis or overdenture including the coupling groove or the embedding groove is manufactured. In detail, a method of manufacturing a prosthesis using the temporary prosthesis is disclosed in Korean Patent No. 10-1883958, and a scanning image of the manufactured temporary prosthesis is obtained. That is, information about the position and direction of the coupling groove or the embedded groove can be obtained based on the image of the groove displayed in intaglio in the scanning image of the temporary prosthesis.

Here, a scanning operation is performed to obtain the scanning image. At this time, the scanning image is acquired as the mobile scanner moves along the outer surface of the temporary prosthesis. As a result, distortion occurs as the image is acquired while moving the mobile scanner. In particular, as the distance between the molars gradually widens toward the posterior teeth, left and right deviation occurs. Moreover, there is a problem in that this deviation occurs differently for each operator who acquires the scanning image, and the lower the operator's skill level, the greater the deviation.

As a result, the precision of the final manufactured prosthesis or overdenture is reduced, and in particular, there is a problem in that it cannot be installed accurately in the oral cavity due to misalignment between the coupling groove or the embedding groove and the fixture. In addition, when reprocessing an incorrectly manufactured prosthesis or overdenture, durability is reduced, so it cannot stably support masticatory pressure, and economic feasibility is reduced due to a short service life.

Furthermore, when the prosthesis or overdenture is forcibly coupled, the restoring force of the prosthesis or overdenture is transmitted to the connecting means and the fixture. As a result, a serious problem arises in which the alveolar bone into which the fixture is installed is melted or fractured.

Korean Patent No. 10-1947635

In order to solve the above problems, the present invention aims to provide an image correction jig for manufacturing dental restorations that improves tooth restoration precision and an image correction method for manufacturing dental restorations using the same.

In order to solve the above problem, the present invention provides a plurality of first alignment protrusions spaced apart in the left and right directions corresponding to a preset first reference interval between the inner surfaces of both molar sides of a dental restoration manufactured to be round along the dental arch of the oral cavity; An image correction jig for manufacturing dental restorations in which a plurality of second alignment protrusions spaced apart in the anteroposterior direction in response to the preset second standard interval are formed to protrude integrally from the outer surface of the support base is attached, and images are taken through an imaging device to obtain a dental restoration image. The first stage of becoming; A second step in which the dental restoration image is transmitted to the planning unit, and a virtual correction jig previously stored in a digital library corresponding to the three-dimensional shape information of the image correction jig for manufacturing the dental restoration is extracted and loaded into the planning unit; A plurality of comparison information is calculated from the correction jig image displayed on the dental restoration image, and the comparison information of the correction jig image is adjusted left and right so that the comparison information matches the reference information displayed at the corresponding position of the virtual correction jig. A third step in which scan distortion error of the dental restoration image integrally connected with the correction jig image is corrected while being virtually moved back and forth; and a fourth step in which the correction jig image is erased to obtain a correction scanning image of the dental restoration with the scan distortion error corrected.

Meanwhile, the present invention compares the scanned image acquired through the imaging device with the 3D corresponding external appearance information previously stored in the digital library to correct the distortion error value, the inner surface of the bimolar side of the dental restoration that is manufactured in a round shape along the dental arch of the oral cavity. A support base provided in the form of a plate extending on both sides with a preset length corresponding to a standardized molar spacing in consideration of anatomical differences by age and gender so that it is placed between the teeth, and both ends of which are temporarily attached to each molar side of the dental restoration; A plurality of first alignment protrusions are formed to protrude integrally from the outer surface of the support base, and are spaced apart from each other corresponding to a first reference interval preset in the left and right directions corresponding to both sides of the support base; and a second alignment protrusion that protrudes from the outer surface of the support base and is provided between each of the first alignment protrusions, wherein a plurality of alignment protrusions are integrally formed with the plurality of alignment protrusions spaced apart from each other corresponding to a preset second reference interval in the front-back direction. Provides an image correction jig for restoration manufacturing.

Through the above solutions, the present invention provides the following effects.

First, a scanned image of a dental restoration to which an image correction jig with a plurality of protrusions protruding and spaced apart at preset dimensions is attached to connect the two molar sides is stored in a digital library as a virtual correction jig with three-dimensional appearance information corresponding to the image correction jig. By matching with , the scan distortion error is corrected, so design precision can be significantly improved.

Second, when the scanned image of the first alignment protrusion spaced left and right and the second alignment protrusion spaced forward and backward of the image correction jig are matched with the first virtual protrusion and the second virtual protrusion of the virtual correction jig, the tooth restoration image integrally connected thereto is created. As it is linked, the scan distortion error in the front-to-back and left-right directions as well as the vertical direction corresponding to the height of each protrusion is corrected, so the correction accuracy of the three-dimensional structure can be significantly improved.

Third, the scan distortion error of the imaging device prepared differently for each dental clinic where dental restorative treatment is performed can be standardized and corrected precisely and objectively through a universal image correction jig, so the reliability of tooth restoration can be significantly improved. .

Fourth, the spacing, height, cross-sectional area, etc. of each protrusion that functions as a standard are set differently, and as the comparison information and reference information diversify, the matching parts are clearly distinguished, so the matching accuracy between the comparison information and reference information By improving, the ease of correction and correction accuracy of scan distortion errors can be significantly improved.

Figure 1 is a perspective view of an image correction jig for manufacturing dental restorations according to an embodiment of the present invention.
Figure 2 is a plan view of an image correction jig for manufacturing dental restorations according to an embodiment of the present invention.
Figure 3 is a rear view of an image correction jig for manufacturing dental restorations according to an embodiment of the present invention.
Figure 4 is a flowchart of an image correction method for manufacturing dental restorations according to an embodiment of the present invention.
Figure 5 is a block diagram of a correction system applied to the image correction method for manufacturing dental restorations according to an embodiment of the present invention.
Figure 6 is an example diagram showing a state in which an image correction jig for manufacturing dental restorations is attached to a temporary prosthesis in the image correction method for manufacturing dental restorations according to an embodiment of the present invention.
Figures 7a and 7b are illustrations showing the correction process in the image correction method for manufacturing dental restorations according to an embodiment of the present invention.
Figure 8 is an example diagram showing a corrected scanning image corrected according to the image correction method for manufacturing dental restorations according to an embodiment of the present invention.

Hereinafter, an image correction jig for manufacturing dental restorations and an image correction method for manufacturing dental restorations using the same according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

At this time, it is desirable to understand that the image correction jig for manufacturing dental restorations of the present invention is an auxiliary means that serves as a standard for correcting the distortion error value of a scanned image acquired through an imaging device in order to manufacture dental restorations. In detail, the dental restoration to which the image correction jig for manufacturing the dental restoration is attached is scanned through the imaging device to obtain the scanned image. In addition, the scanned image can be compared with 3D corresponding external appearance information previously stored in the digital library, and the distortion error value can be corrected.

Here, the 3D corresponding external appearance information is 3D external external information of the image correction jig for manufacturing dental restorations, and is preferably understood to have the same meaning as the virtual correction jig, which will be described later. That is, in the following, the 3D corresponding external shape information and the virtual correction jig are described and illustrated with the same numbers since they correspond to the 3D external shape information of the image correction jig for manufacturing dental restorations. In addition, hereinafter, it is preferable to understand that the image correction jig for manufacturing dental restorations and the image correction jig have the same meaning. In addition, in the present invention, dental restorations are preferably understood to encompass final restorations such as prosthetics or overdentures that replace the patient's lost teeth, and temporary prosthetics used temporarily during the manufacturing period of the final restorations.

At this time, the temporary prosthesis can not only be used temporarily during the manufacturing period of the final restoration, but can also be manufactured to obtain data for accurate design information of the final restoration. That is, in the present invention, it is preferable to understand that the scanned image of the dental restoration obtained through the imaging device is the scanned image of the temporary prosthesis. Additionally, the image correction jig may be attached to the temporary prosthesis and scanned together with the temporary prosthesis.

Figure 1 is a perspective view of an image correction jig for manufacturing dental restorations according to an embodiment of the present invention, Figure 2 is a plan view of an image correction jig for manufacturing dental restorations according to an embodiment of the present invention, and Figure 3 is an embodiment of the present invention. This is a rear view of an image correction jig for manufacturing dental restorations according to an example. At this time, hereinafter, the dental restoration to which the image correction jig is attached will be described and illustrated as the temporary prosthesis. The temporary prosthesis is manufactured in a round shape along the dental arch of the patient's mouth, and the two molar sides are spaced apart from each other to form an arch shape.

Referring to Figures 1 to 3, the image correction jig 10 according to an embodiment of the present invention includes a support base part 11, a first alignment protrusion 12, and a second alignment protrusion 13. do.

The support base portion 11 extends on both sides to a preset length and is provided in a plate shape with substantially flat upper and lower surfaces. At this time, the length of the support base 11 is preferably formed to a length corresponding to the standardized molar spacing by taking into account anatomical differences by age and gender. Furthermore, the length of the support base portion 11 may be provided in stages corresponding to an average value that can represent the molar spacing. Through this, the image correction jig 10 can be mass-produced by dividing it into a preset size. For example, the image correction jig 10 may be manufactured as a ready-made product that is standardized and classified into large/medium/small.

Then, one image correction jig 10 that is close to the oral size of each patient can be selected and temporarily attached to the temporary prosthesis (60 in FIG. 6). Here, temporarily attached means that the image correction jig 10 is attached to the temporary prosthesis (60 in FIG. 6) after the scanning operation of the temporary prosthesis (60 in FIG. 6) to which the image correction jig 10 is attached is completed. It is preferable to understand that it is attached so as to be detachable.

In addition, the support base portion 11 is preferably formed in a trapezoidal shape that becomes narrower toward the front when viewed from above. Accordingly, the distance between the both ends 11a and 11b of the support base 11 and the inner surface of the temporary prosthesis (60 in FIG. 6), which narrows toward the anterior side, can be spaced apart at a substantially similar distance. That is, the gap between the rear side of both ends (11a, 11b) of the support base portion 11 and the inner side of the temporary prosthesis (60 in FIG. 6), and the front side of both ends (11a, 11b) of the support base portion 11 and The interval between the inner surfaces of the temporary prosthesis (60 in FIG. 6) may be spaced apart at substantially similar intervals.

Therefore, the thickness of the adhesive (14 in FIG. 6) that attaches the image correction jig 10 to the temporary prosthesis (60 in FIG. 6) is formed uniformly, and the curing speed, time required for curing, and curing strength are constant. can be maintained. Through this, the image correction jig 10 can be stably attached to the temporary prosthesis (60 in FIG. 6) until the scanning operation is completed. In addition, as the image correction jig 10 constrains the position and separation distance on the bimolar side of the temporary prosthesis (60 in FIG. 6), deformation such as twisting of the temporary prosthesis (60 in FIG. 6) can be prevented. .

The first alignment protrusion 12 is preferably formed to protrude integrally from the outer surface of the support base 11. In detail, the first alignment protrusion 12 has a plurality of alignment ribs 12a, 12b, 12c, and 12d corresponding to a preset first reference interval in the left and right directions corresponding to both sides of the support base portion 11. It is preferable that they are formed spaced apart. Here, the first reference interval is the spacing value d1 between a pair of alignment ribs 12b and 12c adjacent to each other on the central side of the support base 11 and the two end sides 11a of the support base 11. It may encompass the spacing value (d2) between the pair of alignment ribs (12a12d) disposed in 11b). Additionally, the first reference interval may further encompass the spacing value between each of the neighboring alignment ribs 12a, 12b, 12c, and 12d. That is, spacing values between the alignment ribs 12a, 12b, 12c, and 12d corresponding to the left and right directions of the support base portion 11 may be included in the first reference interval.

In addition, the second alignment protrusion 13 is formed to protrude integrally from the outer surface of the support base portion 11, and is provided between the plurality of alignment ribs 12a, 12b, 12c, and 12d at spaced apart angles. desirable. This second alignment protrusion 13 includes a plurality of alignment protrusions (13a, 13b, 13c, 13d), and the plurality of alignment protrusions (13a, 13b, 13c, 13d) are located on the outer surface of the support base portion 11. It may be spaced apart and protruded to correspond to a preset second standard interval in the front-back and left-right directions. Here, the second reference interval is the left and right spacing value (d6, d7) where one of the alignment protrusions (13a, 13b) adjacent to each other is spaced from one of the alignment ribs (12c, 12d) and the alignment of the pair of adjacent alignment ribs (12c, 12d). It can encompass the left-right and front-to-back spacing values (d5, d8) between the protrusions (13a, 13b). In addition, the second reference interval may encompass the front and rear spacing values (d3, d4) at which one of the alignment protrusions (13a, 13b) is spaced apart from the front or rear edge of the support base portion (11). That is, the spacing values (d3, d4, d5, d6, d7, d8) between the plurality of alignment protrusions (13a, 13b, 13c, and 13d) corresponding to the left and right and front and back directions of the support base portion 11 are the first 2Can be included in the standard interval.

At this time, since the first alignment protrusion 12 and the second alignment protrusion 13 protrude integrally from the support base 11, the first alignment protrusion 12 and the second alignment protrusion 13 Each interval of is substantially fixed. Therefore, the image correction jig 10 functions as a reference point in the image correction process described later. That is, each protruding structure of the image correction jig 10 is fixed and the image correction process can be performed based on the set position and shape information. This image correction process will be described later.

Moreover, it is preferable that the first alignment protrusion 12 protrudes in the vertical direction corresponding to a preset first reference height h1. Also, the second alignment protrusion 13 may protrude at a height lower than the first reference height. Here, each of the alignment protrusions 13a, 13b, 13c, and 13d of the second alignment protrusion 13 may have different heights, radii (r1, r2, r3, r4), and cross-sectional areas.

In addition, the first alignment protrusion 12 is preferably formed to protrude into a polygonal shape in which each side and top surface are orthogonal to each other and have angled corners. Moreover, the first alignment protrusion 12 may be formed in a rectangular parallelepiped shape with a predetermined cross-sectional area. That is, the first alignment protrusion 12 is formed as a protruding structure having a rectangular cross-sectional area with different horizontal lengths (w1) and vertical lengths (w2), so that clear corners can be formed at the boundaries of each side and top surface. Additionally, the second alignment protrusion 13 may be formed in a hemispherical shape with a preset radius (r1, r2, r3, r4). Accordingly, the protrusion heights of each of the alignment protrusions 13a, 13b, 13c, and 13d can be formed separately.

That is, the first alignment protrusion 12 and the second alignment protrusion 13 include points/lines/surfaces of characteristic size and shape that can be accurately matched with 3D corresponding external shape information, which will be described later. For example, the vertices, angled corners, top and side surfaces having a preset cross-sectional area, volume, etc. of the plurality of alignment ribs 12a, 12b, 12c, and 12d included in the first alignment protrusion 12 are used as comparison information. can be calculated. In addition, the boundary between the plurality of alignment projections (13a, 13b, 13c, 13d) included in the second alignment projection (13) and the support base portion (11), each of the alignment projections (13a, 13b, 13c, 13d) ), etc. can be calculated from the comparison information. As such a clearly specified image is calculated as the comparison information, it can be accurately overlapped and matched with the reference information included in the 3D corresponding appearance information.

At this time, the first alignment protrusion 12 and the second alignment protrusion 13 are preferably formed to protrude symmetrically from the upper and lower surfaces of the support base portion 11. Accordingly, the image correction jig 10 can be used as a standard even when its upper and lower surfaces are turned over, so convenience of use can be significantly improved. In addition, since each of the alignment ribs (12a, 12b, 12c, 12d) and alignment protrusions (13a, 13b, 13c, 13d) structures are included not only on the upper surface but also on the lower surface of the image correction jig 10, the temporary prosthesis (FIG. The overall scanned image of 60) of the top, bottom, left, right, and front and back sides can be more precisely corrected through the correction process described later.

Moreover, since the image correction jig 10 is attached to the posterior side of the temporary prosthesis (60 in FIG. 6), the scanning error on the posterior side, where greater distortion occurs than on the anterior side due to movement of the scanner, is precisely corrected. It can be.

Figure 4 is a flowchart of an image correction method for manufacturing dental restorations according to an embodiment of the present invention, and Figure 5 is a block diagram of a correction system applied to the image correction method for manufacturing dental restorations according to an embodiment of the present invention. Hereinafter, it is desirable to understand that the image correction method for manufacturing dental restorations and the image correction method have the same meaning.

Referring to Figures 4 and 5, the image correction method includes a step of attaching the image correction jig to the dental restoration and acquiring an image of the dental restoration (s11), a step of correcting the image of the dental restoration based on the virtual correction jig (s12), and It includes a correction scanning image acquisition step (s13).

Additionally, the image correction method may be performed based on the image correction system 200 for manufacturing dental restorations. Here, the image correction system 200 preferably includes an imaging device 1, a planning unit 2, and a digital library 3.

In detail, the imaging device 1 is used to obtain an image of the dental restoration by scanning the temporary prosthesis (60 in FIG. 6) to which the image correction jig 10 is attached. For example, the imaging device 1 may be equipped with a mobile scanner commonly used in surgical procedures such as dentistry. The dental restoration image obtained in this way includes a temporary prosthesis image, which is three-dimensional surface information about the inner and outer surfaces of the temporary prosthesis (60 in FIG. 6). Additionally, the dental restoration image includes a correction jig image that is three-dimensional surface information of the image correction jig 10 temporarily attached to the temporary prosthesis (60 in FIG. 6).

The planning unit 2 compares the dental restoration image acquired through the imaging device 1 with digital information previously stored in the digital library 3, which will be described later, calculates a distortion error value, and distorts the dental restoration image. It is desirable to understand that it is a calculation unit of a computer that corrects based on the digital information. That is, the dental restoration image acquired through the imaging device 1 is loaded into the planning unit 2, and the dental restoration image is displayed on the display connected to the planning unit 2. The planning unit 2 is preferably provided on the manufacturing side, such as a dental laboratory, and can be connected to an image storage device provided on the operating side through wired or wireless communication. For example, scanned images acquired on the surgical side may be loaded into an image storage device on the surgical side and transmitted from the image storage device to the planning unit 2. Here, the image storage device on the surgical side may be a computer device corresponding to the planning unit provided on the manufacturing side.

Then, the virtual correction jig, which is the 3D corresponding external shape information, is extracted from the digital library 3. At this time, it is desirable to understand that the digital library 3 is a database storing overall digital information for manufacturing the dental restoration. The digital library 3 is connected to the planning unit 2 through wired and wireless communication, and information previously stored in the digital library 3 can be selectively extracted and loaded into the planning unit 2. Alternatively, the digital library 3 may be provided as a storage included in the planning unit 2.

Figure 6 is an exemplary diagram showing a state in which an image correction jig for manufacturing dental restorations is attached to a temporary prosthesis in the image correction method for manufacturing dental restorations according to an embodiment of the present invention.

Referring to Figure 6, the temporary prosthesis 60 includes a temporary tooth portion (not shown) and a temporary gum portion 61. The temporary tooth part (not shown) is a part that temporarily replaces a lost tooth, and the temporary gum part 61 is temporarily installed in the patient's mouth, and the temporary tooth part (not shown) is fixed along the upper end. It's part. The temporary tooth part (not shown) and the temporary gum part 61 are integrated into one body through the planning part 2 based on the scanned image of the patient's oral cavity and the prosthetic design information previously stored in the digital library 3. can be designed. In addition, the design information of the temporary prosthesis 60, in which the temporary teeth portion (not shown) and the temporary gum portion 61 are set as virtual images, is transmitted to a manufacturing device such as a 3D printer to produce an actual temporary prosthesis 60. can be manufactured.

Here, it is preferable that a temporary coupling groove 62 is formed in the temporary prosthesis 60 corresponding to the installation position of the fixture installed in the oral cavity. The temporary coupling groove 62 may be recessed into a shape into which the abutment or the top of the attachment can be inserted and coupled. That is, the temporary coupling groove 62 may be formed at a position corresponding to the installation position of the fixture already installed in the alveolar bone. At this time, the scan body 63 may be further coupled to the temporary coupling groove 62. The scan body 63 functions to guide the position information of the temporary bonding groove 62 so that design information of the bonding area can be clearly created during the design process of the final dental restoration. At least one scan alignment surface 63a may be formed on the outer surface of the scan body 63.

It is preferable that the image correction jig 10 is attached through the adhesive 14 to connect both molar sides of the temporary prosthesis 60. In addition, it is preferable that the entire outer surface of the temporary prosthesis 60 to which the image correction jig 10 is attached is scanned through the imaging device 1 to obtain a dental restoration image.

Figures 7a and 7b are illustrations showing the correction process in the image correction method for manufacturing dental restorations according to an embodiment of the present invention, and Figure 8 is an illustration corrected according to the image correction method for manufacturing dental restorations according to an embodiment of the present invention. This is an example diagram showing a correction scanning image.

Referring to FIGS. 7A and 7B, the dental restoration image (m1) is transmitted to the planning unit (2), and three-dimensional shape information of the image correction jig (10) is stored in the digital library (3). In response, the previously stored virtual correction jig (v10) is extracted and loaded into the planning unit (2).

Here, the imaging device 1 for acquiring the dental restoration image m1 may be provided as a mobile scanner. And, the dental restoration image m1 can be acquired while the operator moves the mobile scanner along the outer surface of the temporary prosthesis 60 and the image correction jig 10.

In detail, it is preferable that the imaging device 1 is moved from one molar side of the temporary prosthesis 60 to the anterior side, and at this time, the scan start point of the imaging device 1 is substantially one end of the image correction jig 10. It is desirable to determine this attachment point. In addition, it is preferable that the imaging device 1 is continuously moved from the anterior side to the other posterior tooth side, and the imaging device 1 is moved to pass through the point where the other end of the image correction jig 10 is attached. You can. Subsequently, the imaging device 1 is preferably moved from the other molars of the temporary prosthesis 60 to one molars so that it moves along the outer surface of the image correction jig 10. Through this scanning process, the dental restoration image (m1) accurately contains the connection position of the image correction jig 10 and the three-dimensional surface information of the temporary prosthesis 60 and the image correction jig 10 are integrally connected. can be obtained.

At this time, the dental restoration image (m1) includes a temporary prosthesis image (m60), which is three-dimensional surface information of the inner and outer surfaces of the temporary prosthesis, a temporary coupling groove image (m62), which is concave three-dimensional surface information of the temporary coupling groove (62), and It is desirable to include a correction jig image (m10), which is three-dimensional surface information of the image correction jig (10). In addition, the correction jig image (m10) includes a first alignment protrusion image (m12) and a second alignment protrusion image (m13), which are three-dimensional surface information of the first alignment protrusion 12 and the second alignment protrusion 13. It is desirable to do so.

The virtual correction jig (v10) corresponds to actual design information of the image correction jig (10). That is, the virtual correction jig (v10) and the image correction jig (10) are formed and set to substantially the same size, and the virtual correction jig (v10) is adjusted to the size, position, spacing, etc. of each of the alignment ribs and alignment protrusions. Preset dimensional information is stored in advance. On the other hand, the dental restoration image becomes distorted toward both molars as the imaging device 1 moves during scanning. Accordingly, a distortion error occurs between the virtual correction jig (v10) and the correction jig image (m10).

Meanwhile, a plurality of pieces of comparison information are calculated from the correction jig image (m10). Then, the comparison information of the correction jig image (m10) is virtually moved left and right and forward and backward to match a plurality of reference information displayed at corresponding positions of the virtual correction jig (v10). At this time, as the temporary prosthetic image (m60) integrally connected with the correction jig image (m10) moves in conjunction, the scan distortion error of the dental restoration image (m1) can be corrected.

In detail, the correction jig image (m10) and the virtual correction jig (v10) are preliminary overlapped based on a preset alignment area. At this time, the preset alignment area may be set to a portion displayed at the same location in each image. For example, a specific part among the vertex, edge, or side of one of the plurality of alignment ribs may be set as the alignment area. Alternatively, although not shown in the drawing, a midline formed along the center of the support base may be set as the alignment area.

Here, the comparison information is virtual so that the first spacing e1 of the first alignment protrusion image m12 corresponds to the first reference interval of the first virtual protrusion v12 included in the virtual correction jig v10. It is desirable that it be moved and matched with the reference information. Here, the first spacing e1 is preferably understood as an interval formed by spacing the first alignment protrusion image m12 from the first virtual protrusion v12 in the left and right directions due to scan distortion. Also, it is preferable to understand that the first virtual protrusion v12 is three-dimensional external shape information of the first alignment protrusion. Here, when the first alignment protrusion image (m12) is virtually moved to overlap and match the first virtual protrusion (v12), the dental restoration image (m1) integrally connected with the correction jig image (m10) is linked and corrected. The first distortion error value for the left and right directions can be corrected.

In addition, the comparison information is virtual so that the second spacing e2 of the second alignment protrusion image m13 corresponds to the second reference interval of the second virtual protrusion v13 included in the virtual correction jig v10. It is desirable that it be moved and matched with the reference information. Here, the second spacing e2 is preferably understood as an interval formed by spacing the second alignment protrusion image m13 from the second virtual protrusion v13 in the forward and backward directions due to scan distortion. It is preferable to understand that the second virtual protrusion v13 is three-dimensional external shape information of the second alignment protrusion. Here, when the second alignment protrusion image (m13) is virtually moved to overlap and match the second virtual protrusion (v13), the dental restoration image (m1) integrally connected with the correction jig image (m10) is linked and corrected. The second distortion error value for the front and back directions can be corrected.

At this time, the comparison information is virtually moved so that the third spacing e3 of the second aligned protrusion image m13 corresponds to the second reference interval of the second virtual protrusion v13 and is matched with the reference information. desirable. Here, the third spacing e3 is preferably understood as an interval formed by spacing the second alignment protrusion image m13 from the second virtual protrusion v13 in the left and right directions due to scan distortion. That is, through comparison between the second alignment protrusion image m13 and the second virtual protrusion v13, the distortion error values of the tooth restoration image m1 in the front-back and left-right directions can be simultaneously corrected.

In addition, the fourth spacing (e4, e5) of the first aligned protrusion image (m12) and the second aligned protrusion image (m13) is the distance between the first virtual protrusion (v12) and the second virtual protrusion (v13). The comparison information may be virtually moved to correspond to the reference height (h1, r1) and matched with the reference information. Here, the fourth spacing (e4, e5) is the deformation height (h2, r5) of the first alignment protrusion image (m12) and the second alignment protrusion image (m13) deformed by scan distortion. It is preferable to understand this as a gap formed by being spaced apart from the virtual protrusion v12 and the second virtual protrusion v13 in the vertical direction. Here, when the first alignment protrusion image (m12) and the second alignment protrusion image (m13) are virtually moved to overlap and match the first virtual protrusion (v12) and the second virtual protrusion (v13), the correction jig As the dental restoration image (m1) integrally connected with the image (m10) is corrected in conjunction with the image (m10), the third distortion error value in the forward and backward directions can be corrected.

In this way, the present invention enables three-dimensional correction of distortion of scanned images through dimensional values calculated based on each rib and protrusion structure integrally protruded in the image correction jig 10. That is, 3D image rendering is performed in which comparison information included in the scanned image is compared with reference information included in the 3D corresponding appearance information, and the comparison information is virtually moved and overlapped to match the reference information. Through this, not only distortion errors in the top, bottom, left, right, and front and back directions of the scanned image can be corrected, but also errors due to distortion of the image can be corrected. In addition, since the design information of the final dental restoration is set more accurately and precisely based on the corrected scan image, the design precision of the final restoration can be significantly improved.

In addition, the scan distortion error of the imaging device prepared differently for each dental clinic where tooth restoration treatment is performed can be standardized and corrected precisely and objectively through the image correction jig 10, which is provided for general purposes, so the reliability of tooth restoration is significantly improved. It can be improved.

Moreover, the spacing values may each be set to different sizes. Accordingly, the comparison information and the reference information can be clearly distinguished individually. Through this, problems such as duplication or mis-selection of a piece of comparison information and a piece of reference information matching it can be fundamentally eliminated, and the precision during image correction can be significantly improved.

At this time, each of the comparison information and reference information is calculated and set into characteristic shapes such as vertices, edges, surface shapes, and volumes. In addition, each of the comparison information and reference information is set to have a three-dimensional directionality including up, down, left, right, and forward and backward directions. Accordingly, the correction accuracy of the tooth restoration image can be significantly improved. Moreover, the alignment protrusions 13a, 13b, 13c, and 13d have different positions in the front, rear, left, and right directions and different radius values, so that the protrusion heights can be differentiated. Accordingly, as the comparative information and the reference information are diversified, information that matches each other can be clearly distinguished. Through this, the mutual matching accuracy between the comparison information and the reference information is improved, and the ease of correction and correction accuracy of distortion errors can be further improved.

Moreover, the distortion error of the scanned image for the atypical three-dimensional structure of the temporary prosthesis 60 can be easily corrected through information calculated from the image correction jig 10 that is standardized to preset dimensions. Therefore, the image correction jig 10 is attached so that the correction jig image m10 and the dental restoration image m1, preferably the temporary prosthetic image m60, can be linked on the scanned image. Accordingly, the correction accuracy of the three-dimensional three-dimensional structure can be significantly improved because not only the front-to-back and left-right directions of the temporary prosthetic image (m60) but also the up-and-down scan distortion errors corresponding to the heights of each protrusion are corrected. Through this, the installation precision between the oral cavity and the final manufactured dental restoration can be significantly improved.

Meanwhile, referring to FIG. 8, a virtual coupling unit (v45) containing matching information in common with the scan body image (m63), which is the 3D protruding surface information of the scan body included in the dental restoration image (m1), is stored in the digital library. It can be extracted from (3). And, the scan body image (m63) can be replaced and corrected with the virtual combination unit (v45). Subsequently, the virtual coupling portion (v45) may be swapped concavely at a position corresponding to the placement information to create a virtual coupling groove portion.

In detail, first matching information included in the scan body image (m63) can be calculated. Here, the first matching information may be image information corresponding to at least one of a point, line, or surface of the scan alignment surface image (m63a) displayed on the scan body image (m63). And, a virtual scan body (v63) containing second matching information corresponding to the first matching information can be extracted into the digital library (3). It is desirable to understand that the virtual scan body (v63) is three-dimensional external shape information of the scan body (63).

Here, the second matching information may be image information that matches at least one of the points/lines/planes of the virtual alignment surface (v63a) corresponding to the same position as the first matching information in the virtual scan body (v63). .

At this time, the scan body image (m63) and the virtual scan body (v63) may be overlapped and matched with each other using the first matching information and the second matching information as a common part. At this time, the virtual scan body (v63) stores the virtual coupling part (v45), which is design information of the final coupling part where the final restoration is formed, in an integrated manner. Accordingly, when the virtual scan body (v63) overlaps and matches the scan body image (m63), the virtual combination part (v45) can be virtually arranged on the corrected scanning image (m60r).

Then, the scan body image (m63) can be erased from the correction scanning image (m63r) and replaced with the virtual scan body (v63). At this time, the virtual scan body (v63) and the virtual coupling portion (v45) are displayed as one body, and the virtual coupling portion (v45) is depressed inside the coupling surface image, which is the inner surface image of the correction scanning image (m63r). It can be set virtually and created with design information of the final coupling part.

In this way, in the present invention, the design information of the final coupling part can be accurately set based on the scan body 63 that protrudes to the outside of the temporary prosthesis 60 and is clearly displayed. At this time, since the scan distortion error of the three-dimensional protruding surface information of the scan body 63 has been corrected through the image correction process, the coupling precision between the final coupling portion and the abutment or attachment can be significantly improved.

Meanwhile, terms such as “include,” “comprise,” “equip,” or “have,” as used above, mean that the corresponding component may be present, unless specifically stated to the contrary. Rather than excluding a component, it should be interpreted as allowing additional inclusion of other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

As explained above, the present invention is not limited to the above-described embodiments, and modifications and implementations can be made by those skilled in the art without departing from the scope of the claims of the present invention. And such modifications fall within the scope of the present invention.

10: Image correction jig for manufacturing dental restorations 11: Support base part
12: first alignment protrusion 13: second alignment protrusion
60: Temporary prosthesis

Claims (10)

A plurality of first alignment protrusions are spaced apart in the left and right directions corresponding to the preset first standard interval between the inner surface of the bimolar side of the dental restoration manufactured roundly along the dental arch of the oral cavity, and in the anteroposterior direction corresponding to the preset second standard interval. A first step of obtaining a dental restoration image by attaching an image correction jig for manufacturing a dental restoration in which a plurality of spaced apart second alignment protrusions integrally protrude from the outer surface of the support base and capturing the image through an imaging device;
A second step in which the dental restoration image is transmitted to the planning unit, and a virtual correction jig previously stored in a digital library corresponding to the three-dimensional shape information of the image correction jig for manufacturing the dental restoration is extracted and loaded into the planning unit;
A plurality of comparison information is calculated from the correction jig image displayed on the dental restoration image, and the comparison information of the correction jig image is adjusted left and right so that the comparison information matches the reference information displayed at the corresponding position of the virtual correction jig. A third step in which scan distortion error of the dental restoration image integrally connected with the correction jig image is corrected while being virtually moved back and forth; and
An image correction method using an image correction jig for manufacturing a dental restoration, comprising a fourth step of erasing the correction jig image to obtain a correction scanning image of the dental restoration with the scan distortion error corrected. According to claim 1,
The third step is,
Preliminarily overlapping the correction jig image and the virtual correction jig based on a preset alignment area;
Virtually moving the comparison information to match the reference information so that the spacing of the first alignment protrusion image included in the correction jig image corresponds to the first reference interval of the first virtual protrusion included in the virtual correction jig; ,
An image correction method using an image correction jig for manufacturing a dental restoration, comprising the step of correcting the first distortion error value in the left and right directions by correcting the dental restoration image integrally connected with the correction jig image. According to claim 1,
The third step is,
Preliminarily overlapping the correction jig image and the virtual correction jig based on a preset alignment area;
Virtually moving the comparison information to match the reference information so that the spacing of the second alignment protrusion image included in the correction jig image corresponds to the second reference interval of the second virtual protrusion included in the virtual correction jig; ,
An image correction method using an image correction jig for manufacturing a dental restoration, comprising the step of correcting the second distortion error value in the front and rear directions by correcting the dental restoration image integrally connected with the correction jig image. According to claim 1,
Preliminarily overlapping the correction jig image and the virtual correction jig based on a preset alignment area;
The comparison information is virtually moved so that the protrusion heights of the first alignment protrusion image and the second alignment protrusion image included in the correction jig image correspond to the reference heights of the first virtual protrusion and the second virtual protrusion included in the virtual correction jig. A step of matching the standard information,
An image correction method using an image correction jig for manufacturing a dental restoration, comprising the step of correcting the third distortion error value in the vertical direction by correcting the dental restoration image integrally connected with the correction jig image. According to claim 1,
In the third step,
The comparison information is calculated by selecting at least one of the edges, surfaces, and volumes displayed in the correction jig image, and the reference information is set to an image corresponding to the same position as the comparison information. An image correction jig for manufacturing dental restorations. Image correction method using . According to claim 1,
The first step further includes coupling the scan body to a temporary coupling groove formed in response to the installation position of the fixture in the temporary prosthesis provided with the dental restoration,
The fourth step is,
A virtual coupling part containing matching information common to the scan body 3D protruding external shape information included in the dental restoration image is extracted from the digital library, and the scan body 3D protruding external shape information is replaced with the virtual coupling part and corrected; ,
An image correction method using an image correction jig for manufacturing dental restorations, further comprising the step of swapping the virtual coupling portion to be concave to create a virtual coupling groove. The scanned image acquired through the imaging device is compared with the 3D corresponding appearance information previously stored in the digital library to correct the distortion error value.
To be placed between the inner surface of both molars of a dental restoration manufactured in a round shape along the dental arch of the oral cavity, anatomical deviations by age and gender are taken into consideration, and it is provided in the form of a plate extending on both sides with a preset length corresponding to the standardized molar spacing, with both ends. a support base temporarily attached to each posterior tooth of the dental restoration;
A plurality of first alignment protrusions are formed to protrude integrally from the outer surface of the support base, and are spaced apart from each other corresponding to a first reference interval preset in the left and right directions corresponding to both sides of the support base; and
A dental restoration including second alignment protrusions that protrude from the outer surface of the support base and are provided between each of the first alignment protrusions, wherein a plurality of alignment protrusions are integrally formed with the plurality of alignment protrusions spaced apart in correspondence to a preset second reference interval in the front-back direction. Image correction jig for manufacturing. According to claim 7,
An image for manufacturing a dental restoration, wherein the first alignment protrusion protrudes in the vertical direction corresponding to a preset first reference height, and is protruded in a polygonal shape with angled corners formed by each side having preset vertical and horizontal lengths being orthogonal to each other. Correction jig. According to claim 7,
The second alignment protrusion is formed to have different cross-sectional areas and heights of the alignment protrusions, and each alignment protrusion is protruded and spaced at different intervals in the front-back and left-right directions of the support base. Image correction jig. According to claim 7,
An image correction jig for manufacturing dental restorations, characterized in that the first alignment protrusion and the second alignment protrusion are symmetrically formed to protrude from the upper and lower surfaces of the support base.