KR20230045641A - image correcting jig for manufacturing of dental restoration and image correcting method using thereof - Google Patents

Abstract

To improve dental restoration precision, the present invention provides an image correction method using an image correction jig for manufacturing dental restorations which comprises: a first step in which the image correction jig is attached between the two molar sides of the dental restorations and an 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 a planning unit and a virtual correction jig previously stored in a digital library is extracted and loaded into the planning unit; a third step in which comparison information of a correction jig image is virtually moved left and right and forward and backward such that the multiple comparison information calculated from the correction jig image matches reference information of the virtual correction jig and a scan distortion error of the dental restoration image integrally connected with the correction jig image is corrected; and a fourth step in which a corrected scanning image of the dental restoration with the scan distortion error corrected is obtained. According to the present invention, the scan distortion error is corrected such that design precision can be significantly improved.

Description

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

The present invention relates to an image correction jig for manufacturing a dental restoration and an image correction method for manufacturing a dental restoration using the same, and more particularly, to an image correction jig for manufacturing a dental restoration with improved precision of dental restoration and an image correction method for manufacturing a dental restoration using the same. .

In general, dentures or prostheses are artificial periodontal tissues in the oral cavity that artificially restore appearance and function by replacing missing natural teeth. At this time, the dentures or prosthesis can be installed inside the oral cavity to restore the chewing function and prevent deformation of the periodontal tissue. The denture or prosthesis may be classified into a partial/complete denture and a partial/complete dental prosthesis according to the number of missing teeth. In addition, recently, an overdenture that compensates for the disadvantages of the denture or prosthesis has been disclosed.

Meanwhile, the prosthesis or overdenture is coupled to a fixture placed in the alveolar bone, and the prosthesis or overdenture and the fixture may be connected through a connecting means. In this case, 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 placed in the alveolar bone at predetermined positions along the dental arch. Also, a coupling part to which the abutment or the attachment is coupled is formed on the prosthesis or the overdenture. At this time, in the case of the prosthesis, a coupling groove into which the abutment is inserted and coupled through a screw is formed. And, in the case of the overdenture, a buried groove in which the housing cap coupled to the attachment is embedded and fixed is formed. Here, the coupling groove or the buried 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 the 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 Registration No. 10-1883958, and a scanning image of the manufactured temporary prosthesis is obtained. That is, information on the location and direction of the coupling groove or the embedded groove may be obtained based on an image of the groove displayed in an intaglio on the scanning image of the temporary prosthesis.

Here, a scanning operation for obtaining the scanning image is performed. At this time, the scanning image is obtained while the mobile scanner moves along the outer surface of the temporary prosthesis. Due to this, distortion occurs due to the image being acquired while moving the mobile scanner. Moreover, there is a problem in that such a deviation occurs differently for each worker acquiring the scanning image, and the lower the skill level of the worker, the larger the deviation.

As a result, the precision of the finally manufactured prosthesis or overdenture is lowered, and in particular, there is a problem in that the fixture is not accurately installed in the oral cavity due to a misalignment between the coupling groove or the embedding groove and the fixture. In addition, when the incorrectly manufactured prosthetic or overdenture is reprocessed, durability is lowered, so the chewing pressure cannot be stably supported, and economic feasibility is lowered due to a short service life.

Moreover, when the prosthesis or the overdenture is forcibly coupled, the restoring force of the prosthesis or the overdenture is transferred to the connecting means and the fixture. Due to this, a serious problem occurs in that the alveolar bone in which the fixture is placed is melted or fractured.

Korean Patent Registration No. 10-1947635

In order to solve the above problems, an object of the present invention is to provide an image correction jig for manufacturing a dental restoration with improved precision of dental restoration and an image correction method for manufacturing a dental restoration using the same.

In order to solve the above problems, the present invention is a plurality of first alignment protrusions spaced apart in the left and right directions corresponding to a predetermined first standard interval between the inner surface on the side of the molars of a dental restoration manufactured to be round along the dental arch of the oral cavity An image correction jig for manufacturing a dental restoration in which a plurality of second alignment protrusions spaced apart in the front-rear direction in correspondence with a predetermined second standard interval protrudes integrally to the outer surface of the support base unit is attached, and an image is captured through an imaging device to obtain a dental restoration image The first step to become; 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 corresponding to the 3D 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 tooth restoration image, and the comparison information of the correction jig image is adjusted so that the comparison information is matched with reference information displayed at mutually corresponding positions of the virtual correction jig. A third step of correcting a scan distortion error of the tooth restoration image integrally connected to the correction jig image while moving back and forth virtually; and a fourth step of obtaining a correction scanning image of the dental restoration in which the scan distortion error is corrected by erasing the correction jig image.

On the other hand, the present invention compares the scanned image obtained through the imaging device with the three-dimensional corresponding appearance information previously stored in the digital library to correct the distortion error value. It is provided in the form of a plate extending to both sides with a predetermined length corresponding to the standardized molar spacing in consideration of anatomical deviations by age and gender to be disposed between the support base portion, both ends of which are temporarily attached to each molar side of the dental restoration; First alignment protrusions integrally formed to protrude from the outer surface of the support base part and spaced apart in plurality corresponding to a first standard interval preset in the left and right directions corresponding to both sides of the support base part; and a second alignment protrusion protruding from the outer surface of the support base unit and provided between each of the first alignment protrusions, wherein a plurality of alignment protrusions are spaced apart corresponding to a predetermined second standard interval in the front-back direction and integrally formed with a second alignment protrusion. An image correction jig for manufacturing restorations is provided.

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

First, a virtual correction jig in which a scanned image of a dental restoration to which an image correction jig in which a plurality of protrusions protrude and are spaced apart to connect the molar side is stored as three-dimensional appearance information corresponding to the image correction jig in a digital library. As the scan distortion error is corrected according to matching with the design accuracy, the design precision can be remarkably improved.

Second, when the scan images of the first alignment protrusions spaced left and right of the image correction jig and the second alignment protrusions spaced back and forth are matched with the first virtual protrusions and the second virtual protrusions of the virtual correction jig, a dental restoration image integrally connected therewith is obtained. While being interlocked, not only front and rear and left and right directions but also vertical scan distortion errors corresponding to the height of each protrusion are corrected, so the correction accuracy of the 3D three-dimensional structure can be remarkably improved.

Third, since the scan distortion error of the imaging device prepared differently for each dental clinic where dental restoration treatment is performed can be precisely and objectively corrected through a standardized image correction jig provided for general use, the reliability of dental restoration can be remarkably improved. .

Fourth, as the separation distance, height, cross-sectional area, etc. of each protrusion functioning as a standard ruler is set differently, as the comparison information and reference information diversify, mutually matching parts are clearly distinguished, so the matching accuracy between comparison information and reference information By improving the , the ease of correction of the scan distortion error and the correction accuracy can be remarkably improved.

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

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

At this time, it is preferable to understand that the image correction jig for manufacturing a dental restoration according to the present invention is a standard auxiliary means for correcting the distortion error value of a scanned image obtained through an imaging device in order to manufacture a dental restoration. 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 distortion error value may be corrected by comparing the scanned image with 3D corresponding shape information previously stored in the digital library.

Here, the three-dimensional corresponding external shape information is the three-dimensional external shape information of the image correction jig for manufacturing a dental restoration, and is preferably understood as the same meaning as the virtual correction jig described later. That is, since the 3D corresponding appearance information and the virtual correction jig correspond to the 3D appearance information of the image correction jig for manufacturing a dental restoration, the same numbers will be used for description and illustration. In addition, it is preferable to understand that the image correction jig and the image correction jig for manufacturing dental restorations have the same meaning in the following. In addition, in the present invention, dental restoration is preferably understood to include a final restoration such as a prosthesis or an overdenture in place of a patient's lost tooth, and a temporary prosthesis temporarily used during the manufacturing period of the final restoration.

In this case, the temporary prosthesis can be used temporarily during the manufacturing period of the final restoration and can 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 scan image of the dental restoration acquired through the imaging device is the scan image of the temporary prosthesis. Also, the image correction jig may be attached to the temporary prosthesis and scanned together with the temporary prosthesis.

1 is a perspective view of an image correction jig for manufacturing a dental restoration according to an embodiment of the present invention, FIG. 2 is a plan view of an image correction jig for manufacturing a dental restoration according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. It is a rear view of the image correction jig for manufacturing a dental restoration according to the example. 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 to be round along the dental arch of the patient's mouth, and the sides of both molars are spaced apart from each other to form an arch shape.

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

The support base part 11 extends to both sides with a predetermined length and is provided in a plate shape with upper and lower surfaces substantially flat. At this time, the length of the support base portion 11 is preferably formed to a length corresponding to the standardized posterior teeth interval in consideration of age and gender anatomical deviations. Furthermore, the length of the support base portion 11 may be provided in stages corresponding to an average value that may represent the molar interval. Through this, the image correction jig 10 can be mass-produced by being divided to have a predetermined size. For example, the image correction jig 10 may be manufactured as a standardized ready-made product divided into large/medium/small categories.

In addition, one image correction jig 10 close to the mouth size of each patient may 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 image correction jig 10 in the temporary prosthesis (60 in FIG. It is preferred to understand that it is detachably attached.

In addition, the support base portion 11 is preferably formed in a trapezoidal shape in which the shape viewed from above becomes narrower toward the front. Therefore, the distance between the both ends 11a and 11b of the support base part 11 and the inner surface of the temporary prosthesis (60 in FIG. 6), which becomes narrower towards the anterior teeth, may be spaced at a substantially similar distance. That is, the distance between the rear side of both ends 11a and 11b of the support base portion 11 and the inner surface of the temporary prosthesis (60 in FIG. 6), and the front and rear sides of both ends 11a and 11b of the support base portion 11 Intervals between inner surfaces of the temporary prosthesis (60 in FIG. 6) may be spaced at substantially similar intervals.

Therefore, the thickness of the adhesive (14 in FIG. 6) attaching 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, deformation such as twisting of the temporary prosthesis (60 in FIG. 6 ) can be prevented as the image correction jig 10 constrains the position and spacing on the molar side of the temporary prosthesis (60 in FIG. 6 ). .

Preferably, the first alignment protrusion 12 protrudes integrally from the outer surface of the support base 11 . In detail, the first alignment protrusion 12 includes a plurality of alignment ribs 12a, 12b, 12c, and 12d corresponding to a predetermined first standard interval in the left and right directions corresponding to both sides of the support base portion 11. It is preferable to be formed spaced apart from each other. Here, the first standard interval is a distance value d1 between a pair of alignment ribs 12b and 12c adjacent to each other at the central portion of the support base portion 11 and both end sides 11a of the support base portion 11, The distance value d2 between the pair of alignment ribs 12a12d disposed in 11b) may be included. In addition, the first standard spacing may further include a spacing value between the mutually adjacent alignment ribs 12a, 12b, 12c, and 12d. That is, interval 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 integrally formed to protrude from the outer surface of the support base portion 11, and the plurality of alignment ribs 12a, 12b, 12c, and 12d are provided between spaced apart angles. desirable. The second alignment protrusion 13 includes a plurality of alignment protrusions 13a, 13b, 13c, and 13d, and the plurality of alignment protrusions 13a, 13b, 13c, and 13d are formed on the outer surface of the support base portion 11. It may be spaced apart to correspond to the second reference interval preset in the forward and backward directions and in the left and right directions. Here, the second standard interval is the left-right spacing values d6 and d7 in which the alignment protrusions 13a and 13b are spaced apart from the alignment ribs 12c and 12d and the alignment of a pair of adjacent alignment ribs 12c and 12d. Left and right and forward and backward spacing values d5 and d8 between the protrusions 13a and 13b may be included. In addition, the second standard distance may include front and rear distance values d3 and d4 in which one alignment protrusion 13a and 13b is spaced apart from the front edge or the rear edge of the support base 11 . That is, the distance values d3, d4, d5, d6, d7, and d8 between the plurality of alignment protrusions 13a, 13b, 13c, and 13d corresponding to the left-right and front-back directions of the support base part 11 are the first 2 may be included in the standard interval.

At this time, since the first alignment protrusion 12 and the second alignment protrusion 13 integrally protrude 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 standard in the image correction process to be described later. That is, the image correction process may be performed based on the position and shape information set by fixing each protruding structure of the image correction jig 10 . This image correction process will be described later.

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

In addition, the first alignment protrusion 12 is preferably formed in a polygonal shape with angular corners formed by perpendicularly crossing each side and top surface. Furthermore, the first alignment protrusion 12 may be formed in a rectangular parallelepiped shape having a predetermined cross-sectional area. That is, as the first alignment protrusion 12 is formed as a protruding structure having a rectangular cross-sectional area having different horizontal lengths w1 and vertical lengths w2, clear corners may be formed at the boundary between each side and the upper surface. Also, the second alignment protrusion 13 may be formed in a hemispherical shape having predetermined radii (r1, r2, r3, r4). Accordingly, the protruding heights of the alignment protrusions 13a, 13b, 13c, and 13d may be separately formed.

That is, the first alignment protrusion 12 and the second alignment protrusion 13 include points/lines/surfaces of a characteristic size and shape that can be accurately matched with 3D correspondence appearance information described later. For example, the vertices, angular corners, upper and side surfaces of the plurality of alignment ribs 12a, 12b, 12c, and 12d included in the first alignment protrusion 12, angular corners, and volumes having predetermined cross-sectional areas are used as comparison information. can be derived. In addition, the boundary between the plurality of alignment protrusions 13a, 13b, 13c, and 13d included in the second alignment protrusion 13 and the support base portion 11, each of the alignment protrusions 13a, 13b, 13c, and 13d ) can be calculated as the comparison information. As such a clearly specified image is calculated with the comparison information, it can be accurately overlapped and matched with reference information included in the 3D corresponding appearance information.

At this time, it is preferable that the first alignment protrusion 12 and the second alignment protrusion 13 protrude symmetrically from the upper and lower surfaces of the support base portion 11 . Therefore, since the upper and lower surfaces of the image correction jig 10 can be used as a standard ruler even in an inverted state, the convenience of use can be remarkably improved. In addition, since the structures of the alignment ribs 12a, 12b, 12c, 12d and the alignment protrusions 13a, 13b, 13c, and 13d are included on not only the upper surface but also the lower surface of the image correction jig 10, the temporary prosthesis (Fig. The entire scan image of the top, bottom, left, right, and front and rear sides of 60) can be more precisely corrected through a correction process described later.

Furthermore, since the image correction jig 10 is attached to the posterior side of the temporary prosthetic (60 in FIG. 6), the scan error on the posterior side, which causes greater distortion than the anterior side due to the movement of the scanner, is precisely corrected. It can be.

4 is a flow chart of an image correction method for manufacturing a dental restoration according to an embodiment of the present invention, and FIG. 5 is a block diagram of a correction system applied to the image correction method for manufacturing a dental restoration according to an embodiment of the present invention. Hereinafter, it is preferable to understand that the image correction method for manufacturing a dental restoration and the image correction method have the same meaning.

4 to 5, the image correction method includes attaching the image correction jig to the dental restoration and obtaining a dental restoration image (s11), correcting the dental restoration image based on the virtual correction jig (s12), and A correction scanning image acquisition step (s13) is included.

Also, 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 scans the temporary prosthesis (60 in FIG. 6) to which the image correction jig 10 is attached to acquire the dental restoration image. For example, the imaging device 1 may be equipped with a mobile scanner commonly used in procedures such as dentistry. The tooth restoration image obtained in this way includes a temporary prosthetic image that is three-dimensional surface information about the inner and outer surfaces of the temporary prosthesis (60 in FIG. 6). In addition, the tooth 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 tooth restoration image acquired through the imaging device 1 with digital information previously stored in the digital library 3 to be described later, calculates a distortion error value, and distorts the tooth restoration image. It is preferable to understand that is an arithmetic unit of a computer that corrects based on the digital information. That is, the dental restoration image obtained through the imaging device 1 is loaded into the planning unit 2, and the dental restoration image is displayed on a display connected to the planning unit 2. The planning unit 2 is preferably provided in a manufacturing side such as a dental laboratory, and may be connected to an image storage device provided in a procedure side through wired/wireless communication. For example, scan images acquired on the treatment side may be loaded into an image storage device on the treatment side and transmitted to the planning unit 2 from the image storage device. Here, the image storage device on the treatment 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 appearance information, is extracted from the digital library 3 . At this time, it is preferable to understand that the digital library 3 is a database in which overall digital information for manufacturing the dental restoration is stored. The digital library 3 is connected to the planning unit 2 through wired/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 .

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

Referring to FIG. 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 oral cavity of the patient, and the temporary tooth part (not shown) is fixed along the upper end. Part. The temporary tooth part (not shown) and the temporary gum part 61 are integrally formed through the planning part 2 based on the prosthetic design information pre-stored in the digital library 3 and the scanned image of the oral cavity of the patient. can be designed In addition, the design information of the temporary prosthesis 60 in which the temporary tooth 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, so that the actual temporary prosthesis 60 is produced. can be manufactured.

Here, it is preferable that the temporary coupling groove 62 is formed in the temporary prosthesis 60 to correspond to the placement position of the fixture placed in the oral cavity. The temporary coupling groove 62 may be recessed into a shape into which an upper end of the abutment or the attachment can be inserted and coupled. That is, the temporary coupling groove 62 may be formed at a position corresponding to an implantation position of a fixture already implanted 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 location information of the temporary coupling groove 62 so that design information of the coupling area can be clearly generated in the design process of the final dental restoration. At least one scan alignment surface 63a may be formed on an outer surface of the scan body 63 .

It is preferable that the image correction jig 10 is attached through the adhesive 14 so as to connect the side of both molar teeth 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.

7A and 7B are exemplary views showing a correction process in the image correction method for manufacturing a dental restoration according to an embodiment of the present invention, and FIG. 8 is a corrected image according to the image correction method for manufacturing a dental restoration according to an embodiment of the present invention. It is an exemplary view showing a correction scanning image.

7A to 7B, the dental restoration image m1 is transmitted to the planning unit 2, and 3D shape information of the image correction jig 10 is stored in the digital library 3. Corresponding to the previously stored virtual correction jig v10 is extracted and loaded into the planning unit 2 .

Here, the imaging device 1 for obtaining the tooth restoration image m1 may be provided as a mobile scanner. In addition, the dental restoration image m1 may be acquired while a worker moves the mobile scanner along the outer surfaces of the temporary prosthesis 60 and the image correction jig 10 .

In detail, it is preferable that the imaging device 1 is moved from the posterior teeth on one side of the temporary prosthesis 60 to the anterior teeth, and at this time, the scan starting point of the imaging device 1 is substantially at one end of the image correction jig 10 It is preferred that this point of attachment be determined. And, it is preferable that the imaging device 1 is continuously moved from the anterior tooth side to the other molar side, and the imaging device 1 is moved so as to pass through the point where the other end of the image correction jig 10 is attached can Next, it is preferable that the imaging device 1 is moved from the other molar to the one molar of the temporary prosthesis 60 so as to move along the outer surface of the image correction jig 10 . Through this scanning process, while the connection position of the image correction jig 10 is accurately included, the temporary prosthesis 60 and the 3D surface information of the image correction jig 10 are integrally connected to the dental restoration image m1. can be obtained

At this time, the dental restoration image (m1) includes a temporary prosthetic 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 preferable to include a correction jig image (m10), which is three-dimensional surface information of the image correction jig (10). And, 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 preferable to

The virtual correction jig v10 corresponds to the 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 arranged in the size, position, spacing, etc. of each of the alignment ribs and alignment protrusions. Pre-set dimensional information is stored in advance. On the other hand, the image of the dental restoration is distorted toward both molars as the imaging device 1 is moved 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 back and forth to match a plurality of reference information displayed at mutually corresponding positions of the virtual correction jig v10. At this time, as the provisional prosthetic image m60 integrally connected to the correction jig image m10 is moved interlockingly, the scan distortion error of the tooth 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. In this case, the predetermined alignment area may be set to a part displayed at the same location of each image. For example, a specific portion among vertices, corners, and side surfaces of one of the plurality of alignment ribs may be set as the alignment area. Alternatively, although not shown in the drawings, a midline formed along the central portion of the support base may be set as the alignment area.

Here, the comparison information is simulated so that the first distance e1 of the first alignment protrusion image m12 corresponds to the first reference distance of the first virtual protrusion v12 included in the virtual correction jig v10. It is preferable that it is moved and matched with the reference information. Here, it is preferable to understand the first separation distance e1 as a distance formed by spacing the first alignment protrusion image m12 from the first virtual protrusion v12 in the left-right direction by scanning distortion. And, it is preferable to understand that the first virtual protrusion v12 is the 3D outer shape information of the first alignment protrusion. Here, when the first alignment protrusion image m12 is virtually moved to overlap and match with the first virtual protrusion v12, the tooth restoration image m1 integrally connected to the correction jig image m10 is interlocked and corrected. A first distortion error value in the left and right directions may be corrected.

In addition, the comparison information is simulated so that the second distance e2 of the second alignment protrusion image m13 corresponds to the second reference distance of the second virtual protrusion v13 included in the virtual correction jig v10. It is preferable that it is moved and matched with the reference information. Here, the second spacing e2 is preferably understood as an interval formed by separating the second alignment protrusion image m13 from the second virtual protrusion v13 in the front-back direction by scanning distortion. It is preferable to understand that the second virtual protrusion v13 is three-dimensional outer shape information of the second alignment protrusion. Here, when the second alignment protrusion image m13 is virtually moved to overlap and match with the second virtual protrusion v13, the tooth restoration image m1 integrally connected to the correction jig image m10 is interlocked and corrected. A second distortion error value for the forward and backward directions may be corrected.

At this time, the comparison information is virtually moved so that the third distance e3 of the second alignment protrusion image m13 corresponds to the second reference distance of the second virtual protrusion v13, and is matched with the reference information. desirable. Here, the third distance 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 direction by scanning distortion. That is, through comparison between the second alignment protrusion image m13 and the second virtual protrusion v13, distortion error values in the front and rear and left and right directions of the tooth restoration image m1 can be simultaneously corrected.

In addition, the fourth separation intervals e4 and e5 of the first alignment protrusion image m12 and the second alignment protrusion image m13 are of the first virtual protrusion v12 and the second virtual protrusion v13. The comparison information may be virtually moved to correspond to the reference heights h1 and r1, and may be matched with the reference information. Here, the fourth separation intervals e4 and e5 are deformed heights h2 and r5 of the first alignment protrusion image m12 and the second alignment protrusion image m13 deformed by scan distortion. It is preferable to understand the distance 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 tooth restoration image m1 integrally connected to the image m10 is interlocked and corrected, the third distortion error value for the forward and backward directions may be corrected.

As such, according to the present invention, 3D correction for distortion of a scanned image is possible through dimensional values calculated based on each rib and protrusion structure protruded integrally 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 so as to match the reference information. Through this, not only vertical and horizontal distortion errors of the scanned image and forward and backward distortion errors, but also errors due to distortion of the image can be corrected. In addition, since the design information of the final dental restoration is more accurately and precisely set based on the corrected scan image, the design accuracy of the final restoration can be remarkably improved.

In addition, since the scan distortion error of the imaging device prepared differently for each dental clinic where dental restoration treatment is performed can be precisely and objectively corrected through the image correction jig 10 provided for general use by standardizing, the reliability of dental restoration is remarkably can be improved

Moreover, the interval values may be set to different sizes, respectively. Therefore, the comparison information and the reference information can be individually and clearly distinguished. Through this, problems such as duplication or misselection of one piece of comparison information and one piece of reference information that matches it can be fundamentally eliminated, and thus accuracy can be remarkably improved upon image correction.

At this time, each of the comparison information and reference information is calculated and set in a characteristic shape such as a vertex, an edge, a surface shape, or a volume. In addition, each of the comparison information and reference information is set to have a three-dimensional direction including up, down, left and right, and forward and backward directions. Accordingly, the correction accuracy of the dental restoration image can be remarkably improved. Moreover, since the aligning protrusions 13a, 13b, 13c, and 13d each have different front-back, left-right and left-right positions and have different radius values, the protruding heights can be distinguished. Accordingly, as the comparison information and the reference information diversify, mutually matching information can be clearly distinguished. Through this, as the mutual matching accuracy between the comparison information and the reference information is improved, the easiness and accuracy of correction of the distortion error 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 the information calculated from the image correction jig 10 standardized to a predetermined size. Accordingly, the dental restoration image m1, preferably the temporary prosthetic image m60, which is integrally connected to the correction jig image m10 on a scan image to which the image correction jig 10 is attached, can be interlocked. Accordingly, since not only the front and rear and left and right directions of the temporary prosthetic image m60 but also the vertical scan distortion error corresponding to the height of each protrusion is corrected, the correction accuracy of the 3D three-dimensional structure can be remarkably improved. Through this, the installation precision between the oral cavity and the finally manufactured dental restoration can be remarkably improved.

On the other hand, referring to FIG. 8 , a virtual combining unit (v45) including matching information common to the scan body image (m63), which is scan body 3D protrusion surface information included in the dental restoration image (m1), is the digital library. (3) can be extracted from And, the scan body image m63 can be replaced and corrected by the virtual combiner v45. Subsequently, the virtual coupling part v45 is concavely swapped at a position corresponding to the insertion information, so that a virtual coupling groove can be created.

In detail, the 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, a line, and a plane of the scan alignment surface image m63a displayed on the scan body image m63. Also, a virtual scan body v63 including second matching information corresponding to the first matching information can be extracted into the digital library 3 . It is preferable to understand that the virtual scan body (v63) is three-dimensional external information of the scan body (63).

Here, the second matching information may be image information matched with at least one of a point/line/plane 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 superimposed and matched with each other using the first matching information and the second matching information as a common part. At this time, in the virtual scan body v63, the virtual coupling part v45, which is the design information of the final coupling part to be formed in the final restoration, is integrally stored. Accordingly, when the virtual scan body v63 is overlapped and matched with the scan body image m63, the virtual combiner v45 can be virtually arranged on the corrected scanning image m60r.

Also, the scan body image m63 may be erased from the corrected scanning image m63r and replaced with the virtual scan body v63. At this time, the virtual scan body v63 and the virtual coupler v45 are integrally displayed, but the virtual coupler v45 is sunk into the coupling surface image, which is the inner image of the correction scanning image m63r. It can be set virtually and created as the design information of the final coupling part.

As such, in the present invention, design information of the final coupling part can be accurately set based on the scan body 63 that protrudes outward from 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 is corrected through the image correction process, the coupling precision between the final coupling part and the abutment or attachment can be remarkably improved.

On the other hand, terms such as "comprise", "comprise", "have" or "have" described above mean that the corresponding component may be present unless otherwise stated, It should be construed as being able to further include other components rather than excluding components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Commonly used terms, such as terms defined in a dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and unless explicitly defined in the present invention, they are not interpreted in an ideal or excessively formal meaning.

As described above, the present invention is not limited to the above-described embodiments, and it is possible to modify and implement the present invention by those skilled in the art without departing from the scope claimed in 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 spaced apart in the left and right directions corresponding to a preset first standard interval between the inner surface of the tooth restoration manufactured in a round shape along the dental arch of the oral cavity and the anteroposterior direction corresponding to the preset second standard interval A first step of attaching an image correction jig for manufacturing a dental restoration in which a plurality of spaced apart second alignment protrusions integrally protrude to the outer surface of the support base unit and capturing a dental restoration 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 the digital library corresponding to the 3D 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 tooth restoration image, and the comparison information of the correction jig image is adjusted so that the comparison information is matched with reference information displayed at mutually corresponding positions of the virtual correction jig. A third step of correcting a scan distortion error of the tooth restoration image integrally connected to the correction jig image while moving back and forth virtually; and
An image correction method using an image correction jig for manufacturing a dental restoration comprising a fourth step of obtaining a correction scanning image of the dental restoration in which the scan distortion error is corrected by erasing 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;
Matching the comparison information with the reference information by virtually moving the comparison information so that the distance between the first alignment protrusion images included in the correction jig image corresponds to the first reference distance of the first virtual protrusion included in the virtual correction jig; and ,
An image correction method using an image correction jig for manufacturing a dental restoration, comprising the step of interlocking correction of the dental restoration image integrally connected with the correction jig image to correct a first distortion error value in the left and right directions. 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;
Matching the comparison information with the reference information by virtually moving the comparison information so that the distance between the second alignment protrusion images included in the correction jig image corresponds to the second reference distance of the second virtual protrusion included in the virtual correction jig; and ,
An image correction method using an image correction jig for manufacturing a dental restoration, comprising the step of interlocking correction of the dental restoration image integrally connected with the correction jig image to correct a second distortion error value in the forward and backward directions. 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 protruding 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. and matching with the reference information;
An image correction method using an image correction jig for manufacturing a dental restoration, comprising the step of interlocking correction of the dental restoration image integrally connected with the correction jig image and correcting a third distortion error value in the vertical direction. According to claim 1,
In the third step,
The comparison information is calculated by selecting at least one of a corner, a surface, and a volume displayed in the correction jig image, and the reference information is set to an image corresponding to the same position as the comparison information. Image correction jig for manufacturing a dental restoration, characterized in that Image correction method using . According to claim 1,
The first step further includes a step of coupling the scan body to a temporary coupling groove formed corresponding to the placement position of the fixture in the temporary prosthesis provided as the dental restoration;
In the fourth step,
Extracting a virtual coupling part including matching information common to the three-dimensional protruding shape information of the scan body included in the dental restoration image from the digital library, and replacing and correcting the three-dimensional protruding shape information of the scan body with the virtual combining unit; ,
The image correction method using the image correction jig for manufacturing a dental restoration, characterized in that it further comprises the step of creating a virtual coupling groove by concavely swapping the virtual coupling portion at a position corresponding to the placement information. The scanned image obtained through the imaging device is compared with the 3D corresponding appearance information previously stored in the digital library to correct the distortion error value.
It is provided in the form of a plate extending to both sides with a predetermined length corresponding to the standardized molar spacing in consideration of age and gender anatomical deviations so as 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, with both ends a support base portion temporarily attached to each molar side of the dental restoration;
First alignment protrusions integrally formed to protrude from the outer surface of the support base part and spaced apart in plurality corresponding to a first standard interval preset in the left and right directions corresponding to both sides of the support base part; and
A dental restoration including a second alignment protrusion protruding from the outer surface of the support base unit and provided between each of the first alignment protrusions, wherein a plurality of alignment protrusions are formed integrally by being spaced apart in correspondence to a predetermined second reference interval in the front-back direction. Image correction jig for manufacturing. According to claim 7,
The first alignment protrusion protrudes in the vertical direction corresponding to a preset first reference height, and each surface having a preset vertical and horizontal length is orthogonal to each other and is formed in a polygonal shape with angled corners. Image for manufacturing a dental restoration, characterized in that correction jig. According to claim 7,
The second alignment protrusions are formed to have different cross-sectional areas and heights of the alignment protrusions, and the alignment protrusions are spaced apart from each other at different intervals in the front and rear and left and right directions of the support base for manufacturing a dental restoration, characterized in that the protrusions are formed. image correction jig. According to claim 7,
The image correction jig for manufacturing a dental restoration, characterized in that the first alignment protrusion and the second alignment protrusion are formed symmetrically protruding from the upper and lower surfaces of the support base.

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