Method for manufacturing a dental restoration

Abstract

To improve the accuracy of dental restoration, the present application provides a method for manufacturing a dental restoration prosthesis, comprising: a first step of generating design information of a temporary prosthesis; a second step of correcting the position of a temporary bonding portion formed in the manufactured temporary prosthesis to correspond to the implant information of the implant; a third step of forming a confirmation model aligned and fixed to a base model, and acquiring a first auxiliary scanning image of the confirmation model; a fourth step of virtually overlapping a virtual support portion at the lower part of a virtual restoration portion, and virtually correcting the position of a virtual bonding portion included in the virtual support portion based on the first auxiliary scanning image; and a fifth step of manufacturing and assembling a metal support portion and a restoration portion, thereby manufacturing a dental restoration prosthesis.

Description

Technical Field

[0001] This invention relates to a method for manufacturing dental restorations, and more specifically, to a method for manufacturing dental restorations that improves the accuracy of dental restorations. Background Technology

[0002] Generally, dental restoration refers to artificial periodontal tissues in the oral cavity that artificially restore and replace the appearance and function of missing teeth.

[0003] On the other hand, a dental prosthesis includes a prosthesis portion consisting of multiple artificial teeth that replace missing teeth in a dentition configuration or connection corresponding to the shape of the target dental arch. Additionally, the prosthesis may include an artificial gingiva portion that covers and connects to the lower end of the prosthesis portion. In this case, multiple implants are inserted along the arch spacing of the target dental arch, and a connection is formed in the prosthesis corresponding to the implantation information of the implants.

[0004] Here, the joint can be formed as an insertion hole shape for embedding and fixing the support post. Alternatively, the joint can be formed as a coupling groove shape for fastening the abutment, wherein the abutment is fastened to the implant. Then, by means of the abutment coupled to the support post or the coupling groove, the prosthesis can be disposed inside the opening.

[0005] On the other hand, for edentulous jaw patients who have lost all the teeth of the target dental arch through natural or surgical extraction, a complete restoration is required to be formed along the anterior and bilateral molar sides of the target dental arch as a dental prosthesis. This complete restoration is fabricated through a series of steps, such as acquiring images required to generate design information, generating the design information based on the acquired images, and fabricating a physical object corresponding to the design information.

[0006] At this point, the images acquired to generate the design information include scanned images of the patient's oral cavity and the temporary prosthesis. Specifically, the scanned images of the patient's oral cavity include images acquired by scanning the upper and lower jaws separately, and may also include images of the upper and lower jaws in occlusion and CT images. Then, the scanned images of the temporary prosthesis are images acquired by scanning the inner and outer surfaces of the temporary prosthesis manufactured for temporary use by the patient during the fabrication of the prosthesis.

[0007] Here, the temporary prosthesis has a temporary junction that attaches to the implant. The temporary junction attaches to the implant to allow the temporary prosthesis to be placed in the oral cavity during manufacturing, and the position of the temporary junction is modified during the manufacturing process to match the position of the implant. Thus, information about the designed position of the junction can be obtained from scanned images of the temporary prosthesis.

[0008] At this time, the scanned image of the temporary restoration is acquired while the mobile scanner moves along the outside of the temporary restoration. Therefore, if the mobile scanner deviates from the accurate movement path while moving, distortion occurs in the acquired image, especially lateral deviation as the distance between the molars gradually widens with movement towards the molars. This reduces the accuracy of the final manufactured restoration, particularly causing the restoration to be inaccurately placed in the oral cavity due to positional errors between the joint and the implant. Furthermore, reprocessing inaccurate restorations reduces durability, making it unable to stably support chewing pressure, and reduces economic practicality due to shortened lifespan.

[0009] Furthermore, when a faulty restoration is forcibly attached to the implant, the restoring force of the restoration is transferred to the implant. This results in serious problems such as erosion or fracture of the alveolar bone implanted with the prosthesis.

[0010] (Existing technical literature)

[0011] (Patent Documents)

[0012] Korean Patent No. 10-1947635 Summary of the Invention

[0013] (The problem to be solved)

[0014] To address the problems described above, the present invention provides a method for manufacturing a dental restoration that improves the accuracy of dental restorations.

[0015] (Solutions)

[0016] To address the aforementioned issues, this invention discloses a method for manufacturing a dental prosthesis, comprising: a first step, in order to design the dental prosthesis, setting implantation information of an implant through a planning image generated by a planning unit, and generating design information for a temporary prosthesis based on the planning image, setting virtual temporary joints for each implantation information; a second step, transmitting the design information of the temporary prosthesis to a manufacturing apparatus, manufacturing a temporary prosthesis having temporary joints corresponding to the virtual temporary joints, and correcting the position of the temporary joints to correspond to the position of an implant already implanted in the target dental arch; and a third step, forming a confirmation model, wherein the confirmation model is used to align a simulation body with the temporary prosthesis in multiple universal insertion slots spaced apart on a base model. In the first step, a first auxiliary scan image of the confirmed model is acquired by an imaging device and sent to the planning unit at a fixed position; in the second step, the planning unit sets up a virtual restoration part with multiple tooth images arranged continuously according to a pre-defined dentition structure, and a virtual support part extracted from the database is virtually moved to the planning unit to virtually overlap the lower part of the virtual restoration part, and the position of the virtual joint part included in the virtual support part is virtually corrected based on the first auxiliary scan image; and in the third step, the virtual support part and the virtual restoration part with a virtual assembly groove set by eliminating the overlapping part of the virtual support part are sent to the manufacturing device to be manufactured into a metal support part and a restoration part respectively, and the metal support part is assembled and fixed in the assembly groove formed in the restoration part, thereby finally manufacturing a dental restoration.

[0017] (The effect of the invention)

[0018] Through the above-described solutions, the present invention provides the following effects:

[0019] First, a temporary prosthesis, modified to correspond to the actual implantation location of the fixator, is fastened to a simulated body and inserted into various universal insertion slots of a base model configured with a simple shape. Then, a high-precision confirmation model is prepared by a simple method of embedding and fixing with cured resin. Accurate design information of the prosthesis can be obtained using this confirmation model.

[0020] Secondly, in addition to the maximum diameter of the simulated body and the correction interval, the universal insertion slot also takes into account the height difference formed by the curvature of the alveolar bone to form the inner diameter and the depth of the recess. Therefore, it significantly reduces and shortens the number of steps and time required to accurately set the depth and position of the grooves for each simulated body, thereby significantly improving the accuracy of the confirmed model.

[0021] Third, the accuracy of the final manufactured restoration can be confirmed by using a confirmation model that accurately fixes the position of the simulation body, thus reducing the number of visits for patients and improving convenience. At the same time, the restoration can be processed with maximum precision before being placed in the oral cavity, thus preventing the alveolar bone from being injured due to the restorative force of the restoration.

[0022] Fourth, the image correction fixture with pre-set values ​​of protrusion and multiple protrusions is matched with the scanned image of the temporary restoration attached to connect the two molar sides and saved in the database as a virtual correction fixture with three-dimensional appearance information corresponding to the image correction fixture, thereby correcting the three-dimensional distortion error value and thus significantly improving the design accuracy. Attached Figure Description

[0023] Figure 1 This is a flowchart of a method for manufacturing a dental restoration according to an embodiment of the present invention.

[0024] Figure 2 This is a block diagram of a manufacturing system for a dental restoration according to an embodiment of the present invention.

[0025] Figure 3 This is an example diagram of a planned image according to an embodiment of the present invention.

[0026] Figure 4 This is an example diagram of a temporary repair body according to an embodiment of the present invention.

[0027] Figure 5 This is a cross-sectional example diagram of the correction process of a temporary prosthesis according to an embodiment of the present invention.

[0028] Figure 6 This is a three-dimensional view of the basic model and simulation object of an embodiment of the present invention.

[0029] Figure 7a and Figure 7b This is an example diagram illustrating the confirmation model formation process of an embodiment of the present invention.

[0030] Figure 8 This is an example diagram of the virtual column setting process according to an embodiment of the present invention.

[0031] Figure 9 This is an example diagram illustrating the design information of a dental restoration according to an embodiment of the present invention.

[0032] Figure 10 This is a cross-sectional view of a dental restoration manufactured according to an embodiment of the present invention.

[0033] Figure 11 This is an example diagram showing the state of a temporary repair body with an attached image correction fixture according to an embodiment of the present invention.

[0034] Figure 12a and Figure 12b This is an example diagram of the distortion correction process of a temporary restoration image according to an embodiment of the present invention.

[0035] Figure 13 This is an example diagram of a preparatory repair body manufactured according to an embodiment of the present invention.

[0036] Figure 14 This is an example diagram illustrating the fixing process of a temporary column according to an embodiment of the present invention.

[0037] (Explanation of reference numerals in the attached diagram)

[0038] M: Planned Image m70: Virtual Restoration Department

[0039] m80: Virtual support part 10: Image correction fixture

[0040] 20: Temporary column; 30: Confirmed model

[0041] 60: Temporary restoration; 70: Restoration section

[0042] 79: Assembly slot; 80: Metal support section

[0043] 82: Alignment groove; 90: Restoration for dental restoration Detailed Implementation

[0044] Hereinafter, a method for manufacturing a dental restoration according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0045] Figure 1 This is a flowchart of a method for manufacturing a dental restoration according to an embodiment of the present invention; Figure 2 This is a block diagram of a manufacturing system for a dental restoration according to an embodiment of the present invention; Figure 3 This is an example diagram of a planned image according to an embodiment of the present invention.

[0046] Reference Figures 1 to 3 A method for manufacturing a dental restoration according to an embodiment of the present invention includes: a step of generating a planning image and design information of a temporary restoration (s11); a step of manufacturing and modifying a temporary restoration (s12); a step of manufacturing a confirmation model and acquiring a first auxiliary scanning image (s13); a step of generating a virtual support and a virtual restoration (s14); and a step of manufacturing a dental restoration (s15).

[0047] On the other hand, the dental prosthesis of the present invention is manufactured to replace missing teeth, and an example of a complete prosthesis suitable for patients with an edentulous mandible will be described and illustrated. That is, the target dental arch in the present invention is the mandible, and the dental arch that bites with the target dental arch is the opposing dental arch, which will be described and illustrated as the maxilla with teeth. Of course, depending on the circumstances, the present invention can also be applied to the manufacture of dental prostheses for patients with an edentulous maxilla or both edentulous upper and lower jaws.

[0048] Preferably, this method for manufacturing a dental prosthesis is performed by a dental prosthesis manufacturing system 200, which includes an imaging device 210, a planning unit 220, and a manufacturing device 230.

[0049] The imaging device 210 is a device for acquiring three-dimensional information of the oral cavity. The three-dimensional information of the oral cavity is preferably understood to include three-dimensional surface information of the oral cavity and alveolar bone information m6. Here, the three-dimensional surface information of the oral cavity may include the three-dimensional surface information m2 of the target dental arch and the three-dimensional surface information m3 of the opposing dental arch. Furthermore, the imaging device 210 is preferably understood to include a scanner for acquiring the three-dimensional surface information of the oral cavity and a CT imaging device for acquiring the alveolar bone information m6.

[0050] Specifically, the scanner is used to acquire three-dimensional surface information m2 and m3 of the target dental arch and the opposing dental arch. The three-dimensional surface information m2 of the target dental arch includes the three-dimensional surface information of the gingiva exposed due to tooth loss or extraction. The three-dimensional surface information m3 of the opposing dental arch can include surface information of the remaining opposing teeth or gingiva in an image. From the alveolar bone information m6, the shape, curvature, density of the alveolar bone, and the location of the subalveolar nerve can be confirmed and calculated.

[0051] The planning unit 220 is preferably understood as a computer that combines, calculates, and models information transmitted wirelessly from an external device with information stored in the database 240 (described later). Here, the database 240 is preferably understood as a database that stores basic appearance information of the components required for dental restoration in three-dimensional vector data. Preferably, the database 240 stores multiple three-dimensional appearance information of virtual fixators and virtual abutments, as well as multiple three-dimensional appearance information of virtual restoration parts and virtual support parts. This three-dimensional appearance information, loaded into the planning unit 220, can be used to generate a planning image M and design information for the dental restoration.

[0052] The planning image M is an image used to generate design information for the dental prosthesis and the temporary prosthesis. It is an image that aligns and integrates the three-dimensional information of the oral cavity to correspond to a predetermined vertical diameter m8. Preferably, the implantation information m7 of multiple implants is aligned and spaced apart along the dental arch in the planning image M. Hereinafter, the implants will be described and shown using a fixator as an example.

[0053] The manufacturing apparatus 230 is preferably understood as an apparatus for manufacturing the restorative part and the metal support part according to the design information of the dental restoration. Preferably, the manufacturing apparatus 230 includes a small CNC lathe or a 3D printer for manufacturing the restorative part. Additionally, preferably, the manufacturing apparatus 230 includes a milling device that processes a titanium block according to the design information of the virtual support part to manufacture the metal support part.

[0054] Figure 4 This is an example diagram of a temporary repair body according to an embodiment of the present invention.

[0055] Reference Figures 3 to 4 Preferably, design information for a temporary prosthesis is generated based on the planning image M, setting a virtual temporary junction in each of the implantation information m7. Here, the virtual temporary junction is the part that is attached to the abutment fastened to the fixator, and the design information for the temporary prosthesis can be set to a cylindrical shape that runs vertically through the body.

[0056] In detail, the design information of the temporary prosthesis can be based on the three-dimensional information of the oral cavity and multiple virtual tooth images included in the virtual prosthesis m70, and the appearance can be set. Furthermore, in each implantation information m7, the virtual temporary joint can be disposed through the virtual prosthesis m70.

[0057] The design information of the temporary prosthesis is sent to the manufacturing apparatus, which can manufacture the temporary prosthesis 60 corresponding to the design information into a physical object. Here, the temporary prosthesis 60 is a prosthesis that can be temporarily used by the patient during the manufacture of the final dental prosthesis. The temporary prosthesis can be modified according to the patient's oral cavity through a process described later, and the accurate design information of the dental prosthesis can be obtained from the scanned image acquired by scanning the modified temporary prosthesis 60. Since the design information of the temporary prosthesis corresponds to the actual shape of the temporary prosthesis 60, specific details are omitted.

[0058] Preferably, the temporary prosthesis 60 includes a temporary tooth portion 64 and a temporary gingival portion 61.

[0059] The temporary tooth portion 64 is formed as a structure in which multiple artificial teeth, occluding the opposing dental arch, are continuously arranged along the dental arch. In this case, the multiple artificial teeth can actually be connected as a single unit, with each artificial tooth separated by a concave shape corresponding to the interdental space, thus providing an aesthetic appearance similar to real teeth. Occlusal surfaces for occluding the opposing teeth are formed on the upper surface of each artificial tooth.

[0060] Then, preferably, a temporary joint 62 is formed in each position corresponding to the implantation information m7 in the temporary tooth portion 64. At this time, the temporary joint 62 forms the virtual temporary joint as design information, and the temporary joint 62 can be formed vertically. The temporary post can be embedded and fixed in the temporary joint 62 through a process described later. The temporary gingival portion 61 is formed to surround and connect the root side of the temporary tooth portion 64, and can be formed such that the lower surface of the temporary gingival portion 61 faces the gingiva.

[0061] In order to shorten the manufacturing time of the temporary restoration 60, the temporary tooth portion 64 and the temporary gingival portion 61 can actually be formed as a single piece. For example, the temporary tooth portion 64 and the temporary gingival portion 61 can be used as the temporary restoration 60 after being printed and cured together using a 3D printer with synthetic resin as the material.

[0062] Preferably, a matching portion 65 is also formed on the outer contour side of the temporary gingival portion 61. The matching portion 65 is a portion that expands outward from the outer contour of the temporary gingival portion 61 to form a single unit, and its inner surface forms a matching surface that matches the outer surface of the target dental arch. The matching portion 65 is connected to the temporary gingival portion 61 by a plurality of separating portions 66, which are formed at intervals through elongated holes 67. Preferably, the separating portions 66 are formed to a thickness sufficient to connect the matching portion 65 and the temporary gingival portion 61 into a single unit.

[0063] Preferably, the matching portion 65 is formed to have an area that can be uniformly matched with the lingual and labial surfaces of the target dental arch. Furthermore, the matching surface and the inner surface of the temporary gingival portion 61 are formed based on the three-dimensional surface information of the target dental arch. Thus, even in the case of an edentulous jaw with all teeth missing, the position of the temporary restoration 60 can be accurately aligned. The matching portion 65 separates from the temporary gingival portion 61 after the temporary joint 62 is embedded and the temporary post is fixed.

[0064] Figure 5 This is a cross-sectional example diagram of the correction process of a temporary prosthesis according to an embodiment of the present invention.

[0065] At this time, modifying the temporary prosthesis 60 is preferably understood as modifying the temporary bonding portion 62 formed on the temporary prosthesis 60. Furthermore, modifying the temporary bonding portion 62 is preferably understood as modifying the embedding position of the temporary post 20 and the lower structure of the temporary post 20, i.e., the position of the temporary bonding groove 22, within the temporary bonding portion 62 corresponding to the implantation information. That is, modifying the temporary bonding portion 62 is preferably understood to have the same meaning as determining the position of the temporary bonding groove 22 based on the position of the temporary post 20 embedded and fixed inside the temporary bonding portion 62.

[0066] Reference Figures 4 to 5 The fixator 5 is implanted into the alveolar bone according to each implantation information, and the abutment 9 is fastened to each fixator 5. Then, the temporary post 20 can be fixed to the abutment 9 by means of a fastening rod 4 or a fastening bolt.

[0067] Then, the temporary restoration 60 is disposed on the target dental arch 2 such that the temporary post 20 is inserted into the interior of the temporary joint 62. Here, since the matching portion 65 is integrally formed on the temporary restoration 60, the temporary restoration 60 can be accurately positioned on the target dental arch 2 if the matching portion 65 matches the gingiva. With the temporary restoration 60 accurately positioned on the target dental arch 2, curing resin 1 is injected between the temporary joint 62 and the temporary post 20.

[0068] Here, the temporary joint 62 is expanded to a diameter 7a larger than the basic diameter corresponding to the maximum outer diameter of the temporary post 20. That is, the temporary joint 62 is configured to include a correction interval 7b that corrects for a possible positional error 7 between the actual implantation position 5c (hereinafter, actual implantation position) of the fixator 5 implanted in the alveolar bone and the center 9c of the temporary joint 62. Thus, even if the positional error 7 occurs between the actual implantation position 5c and the center 9c of the temporary joint 62, the temporary post 20 can be disposed without interference on the inner periphery of the temporary joint 62.

[0069] At this time, if the temporary post 20 is embedded and fixed in the temporary joint 62 by the cured resin 1, the position of the temporary joint groove 22 can be accurately formed corresponding to the actual implantation position 5c. Thus, the temporary restoration 60 can be accurately placed in the target dental arch 2. Furthermore, this improves the reliability of the images obtained by scanning the temporary restoration 60 and significantly improves the accuracy and precision of the dental restorations generated based on this. On the other hand, preferably, the matching part 65 separates from the temporary gingival portion 61 after the cured resin 1 has fixed the temporary post 20 in the temporary restoration 60.

[0070] Figure 6 This is a three-dimensional view of the basic model and simulation object of an embodiment of the present invention; Figure 7a and Figure 7b This is an example diagram illustrating the confirmation model formation process of an embodiment of the present invention.

[0071] like Figures 6 to 7b As shown, preferably, a confirmation model 30 is formed using the temporary restoration 60. The confirmation model 30 is prepared to check the accuracy of the metal support while generating the three-dimensional information required for the design information of the dental restoration.

[0072] Specifically, the positional information of the virtual joint included in the virtual support can be calculated from the first auxiliary scan image obtained from the scanning confirmation model 30. Furthermore, by configuring and fixing the metal support in the confirmation model 30, it can be checked whether the shape of the joint formed based on the virtual joint is in the accurate position.

[0073] Reference Figure 6 Preferably, the confirmation model 30 includes a basic model 31 and a simulation body 32.

[0074] Preferably, the base model 31 is formed as a block with a predetermined thickness, and a plurality of universal insertion slots 33 are formed at intervals along lines corresponding to the dental arch. Here, preferably, the universal insertion slots 33 are formed on the base model 31 based on the implantation information, and are formed with an inner diameter and depth recess including extra spacing, wherein the extra spacing includes the correction interval.

[0075] The simulation body 32 is fixed to the universal insertion slot 33 of the base model 31, and is provided as a confirmation component that replaces the fixture and the base as an integral part, to check the fit of the joint formed on the metal support. Specifically, preferably, the simulation body 32 is formed with its upper end corresponding to the upper part of the base, while its lower part extends a predetermined length.

[0076] Preferably, the confirmation model 30 is formed through the following series of processes. Hereinafter, the connection of the simulation body 32 to the temporary connection groove 22 is preferably understood to have the same meaning as the connection of the simulation body 32 to the temporary connection portion 62.

[0077] Reference Figure 7a The upper end of the mannequin 32 is inserted into the temporary insertion groove 22, and the mannequin 32 and the temporary post 20 are secured with fastening bolts 24. At this time, the temporary insertion groove 22 is in a state of being aligned with the actual implantation position, so the position of the mannequin 32 can correspond to the actual implantation position.

[0078] Then, the lower ends of each of the simulated bodies 32 are inserted into the universal insertion slot 33. Here, the universal insertion slot 33 is formed with an inner diameter including the correction interval, so that even if the universal insertion slot 33 is not formed at a height-accurate position, the simulated body 32 can be easily inserted into the universal insertion slot 33 without interference. Furthermore, preferably, the universal insertion slot 33 is formed with a depth including the correction interval. Thus, even if the height difference between the anterior and molar sides of the temporary restoration 60 causes the simulated body 32 to engage with each of the temporary engagement slots 22 at different heights, the lower end of the simulated body 32 can be easily inserted into the universal insertion slot 33.

[0079] Reference Figure 7b With the lower end of the simulated body 32 inserted into the universal insertion slot 33, the universal insertion slot 33 is filled and cured with the curing resin 1. This allows the simulated body 32 to be accurately fixed in position on the confirmation model 30, corresponding to the actual implantation location. Then, once the curing resin 1 has completely cured, and the simulated body 32 is firmly fixed within the universal insertion slot 33, the temporary prosthesis is separated. This results in the confirmation model 30, where the upper end of the simulated body 32 protrudes outward from the base model 31.

[0080] Thus, the present invention provides a larger diameter for the universal insertion slot 33 compared to the implantation information, including the maximum diameter of the simulation body 32 and the excess spacing including the correction interval. Furthermore, the universal insertion slot 33 takes into account the curvature of the alveolar bone, and even the depth of the recess is determined by considering the excess spacing. Therefore, the design of the basic model 31 is significantly simplified, while the number of manufacturing steps and time required are significantly reduced. Moreover, even with the simplified structure of the basic model 31, the temporary restoration 60 accurately aligns and fixes the position and height of the simulation body 32, thus significantly improving the reliability of the design information obtained from the confirmation model 30.

[0081] On the other hand, the column 20A is fastened to each of the simulated bodies 32 by the fastening bolts 24, thereby protruding upwards to fix the column 20A. In this case, the column 20A is preferably understood as a separate column of the same type as the temporary column 20 fixed to the temporary prosthesis 60. The column 20A protruding from the simulated body 32 can be aligned at the same position, angle, and height as the temporary column 20 embedded and fixed to the temporary prosthesis 60.

[0082] Figure 8 This is an example diagram of the virtual column setting process according to an embodiment of the present invention; Figure 9This is an example diagram illustrating the design information of a dental restoration according to an embodiment of the present invention. At this time, for... Figure 9 It is preferred to understand this as showing a portion of the first auxiliary scan image.

[0083] Reference Figure 8 Preferably, the virtual restoration part m70 is set on the planning image M by the planning unit. The virtual restoration part m70 applicable to the design information of the dental restoration prosthesis is preferably understood to be the same as the virtual restoration part m70 applicable to the design information of the temporary prosthesis; detailed explanation of this is omitted. Then, preferably, the virtual support part m80 extracted from the database is virtually moved to the planning unit, virtually overlapping the lower part of the virtual restoration part m70.

[0084] Preferably, the virtual support portion m80 includes a virtual connecting portion m81 and a virtual connecting portion m85. Preferably, the virtual connecting portion m81 is part of the design information for the portion that connects to the base, and the centers of each virtual connecting portion m81 are aligned with the implantation information and virtually configured. Then, preferably, the virtual connecting portion m85 extends virtually to connect the various virtual connecting portions m81 to each other. Through the process described later, the virtual support portion m80 can be modified corresponding to the actual implantation location, and the final design information is sent to the manufacturing apparatus to manufacture a metal support portion made of metal.

[0085] Preferably, the portion overlapping the virtual support portion m80 is eliminated in the virtual repair portion m70. Accordingly, a virtual assembly groove m79 corresponding to the appearance of the virtual support portion m80 can be provided in the virtual repair portion m70. At this time, the virtual assembly groove m79 can be expanded and set to be larger than the volume of the virtual support portion m80 by a predetermined amount of extra space. Thus, the metal support portion can be easily inserted into the assembly groove of the repair portion described later.

[0086] On the other hand, preferably, the position of the virtual joint m81 included in the virtual support m80 is virtually corrected based on the first auxiliary scan image m30.

[0087] In detail, refer to Figure 7b and Figure 9 The first auxiliary scan image m30 can be obtained by scanning the inner and outer surfaces of the confirmation model 30 that fixes the column 20A using the imaging device. Then, preferably, the first auxiliary scan image m30 is transmitted from the imaging device to the planning unit. Preferably, the first auxiliary scan image m30 includes the three-dimensional surface information of the column, i.e., the main image m20.

[0088] Here, the confirmation model 30 fixes the column 20A to the simulation body 32, which is accurately aligned and fixed corresponding to the actual implantation location. Thus, the main image m20 included in the first auxiliary scan image m30 accurately corresponds to the actual implantation location and is clearly displayed as protruding outwards. Accordingly, the reliability of the information included in the first auxiliary scan image m30 can be significantly improved.

[0089] Furthermore, the scanned image of the confirmed model 30, which is a block-shaped structure with both molars forming a single unit, is used as design information for the dental restoration. Based on this, accurate design information can be calculated instead of the scanned image of the temporary restoration 60, which exhibits image distortion when scanned along the arch towards the molars.

[0090] On the other hand, preferably, a virtual column v20 is retrieved from the database and virtually moved to the planning department. The virtual column v20 is preferably understood as three-dimensional appearance information corresponding to the design information of the temporary column or the column body. Multiple virtual columns v20 are categorized according to pre-set specifications and stored in the database. A virtual column v20 that conforms to the dental restoration process is selected from the database and transmitted to the planning department.

[0091] The virtual pillar v20 virtually overlaps with the main image m20, and the main image m20 can be virtually replaced by the virtual pillar v20, thus eliminating the main image m20. Therefore, the virtual pillar v20, as information about the three-dimensional appearance, replaces the scanned image, which may contain unclear image information due to light scattering and foreign matter adhering during the scanning process, and can be used as clear design information.

[0092] At this time, the virtual column v20 does not visualize the three-dimensional appearance information of its exposed outer surface. Therefore, the virtual coupling groove v82, set inside the virtual column v20, is visually displayed when the virtual column v20 virtually overlaps with the main image m20. Then, based on the virtual coupling groove v82, the position and inner shape of the virtual coupling portion m81 can be clearly defined.

[0093] Figure 10 This is a cross-sectional view of a dental restoration manufactured according to an embodiment of the present invention.

[0094] Reference Figure 8 and Figure 10 Preferably, the virtual repair portion m70, which sets the virtual assembly slot m79, and the virtual support portion m80, which is virtually modified to correspond the virtual joint portion m81 to the actual implantation position, are respectively delivered to the manufacturing apparatus. Then, preferably, the repair portion 70 and the metal support portion 80 corresponding to the virtual repair portion m70 and the virtual support portion m80 are manufactured into physical objects.

[0095] Preferably, the assembly groove 79 is formed in the repair portion 70, and a connecting hole 72 communicating with the assembly groove 79 may also be formed. The connecting hole 72 is the portion communicating with the connecting groove 82 described later, and is preferably understood as the portion through which the fastening bolt 24 is inserted. The repair portion 70 may be prepared by three-dimensional milling and sintering a zirconia material block corresponding to the shape of the virtual repair portion m70, or it may be manufactured by printing and curing a synthetic resin material using a three-dimensional printer.

[0096] Preferably, the metal support portion 80 includes the connecting portion 81 and the connecting portion. Preferably, the appearance of the connecting portion 81 and the connecting portion corresponds to the virtual connecting portion and the virtual connecting portion, therefore detailed description is omitted. Preferably, the connecting portion 81 is the part that connects to the base 9, including a connecting groove 82, a through portion 83, and a boss portion 84. The connecting groove 82 is the part that inserts into the base 9, and the through portion 83 is the part that communicates with the connecting groove 82 and receives the head of the fastening bolt 24. The boss portion 84 is a structure that protrudes radially inward along the boundary of the connecting groove 82 and the through portion 83, and is the part that holds the head of the fastening bolt 24 in place.

[0097] The fastening bolt 24 is inserted through the connecting hole 72 and the through portion 83, and the end of the fastening bolt 24 is threadedly fastened to the upper end of the base 9. Then, the boss portion 84 engages between the head of the fastening bolt 24 and the base 9, so that the metal support portion 80 can be fixed to the retainer 5.

[0098] Furthermore, a covering extension 86 can be formed extending from the connecting groove 82. The covering extension 86 protrudes downward along the lower edge of the connecting groove 82, and its end extends to a length matching the allowance of the base 9. Thus, even if the metal support 80 is formed with a relatively thin thickness as a standard model, the outside of the base 9 can be covered by the covering extension 86.

[0099] Preferably, the metal support portion 80 is prepared by three-dimensionally milling a block of titanium or titanium alloy material corresponding to the shape of the virtual support portion m80. Then, the metal support portion 80 is inserted into the assembly slot 79 and attached and fixed by adhesive, thereby finally manufacturing the dental restoration 90. In this way, the dental restoration 90 is supported along the entire dental arch by the metal support portion 80, thus significantly improving the support strength against chewing pressure.

[0100] The accuracy of the position of the joint 81 can be confirmed by the verification model 30 of the metal support 80. Specifically, to check the position of each joint 81 formed on the metal support 80, the verification model 30 of the column 20A is prepared to be separated. Then, each of the simulated bodies 32 protruding from the upper side of the verification model 30 is individually inserted into each joint 81. At this time, the degree of misalignment or gap between each joint 81 and each simulated body 32 is confirmed, thereby checking the accuracy of the metal support 80.

[0101] Thus, the present invention obtains accurate design information for the dental prosthesis 90 through the verification model 30, while also checking the accuracy of the finally manufactured metal support 80. This significantly improves the accuracy of the dental prosthesis 90, thereby increasing patient satisfaction with dental restoration. Furthermore, the metal support 80 can be accurately confirmed, corrected, or remanufactured outside the oral cavity. This prevents injury to the alveolar bone implanted in the fixation device due to the transmission of restoring force from the metal support 80 (made of metal material) to the alveolar bone.

[0102] On the other hand, the lower end of the dental restoration 90 may also include a color-developing layer 191. Specifically, the lower end of the dental restoration 90 is coated with a coating composition having a predetermined viscosity in layers of a predetermined thickness. In this case, the coating composition may contain a base powder of the same material as the restoration portion 70 and a powder formulation containing a predetermined pigment to develop a color corresponding to the target dental arch 2. For example, the base powder may include one selected from ceramic powder, porcelain powder, zirconia powder, and mixtures thereof, and an oxide. The oxide may include one selected from silica, alumina, zinc peroxide, sodium oxide, potassium oxide, zirconia, calcium oxide, phosphoric anhydride, and mixtures thereof.

[0103] Then, a paint composition of various colors can be applied in multiple layers to the outer side of the lower end of the dental restoration 90. Accordingly, the color-developing layer 191 gradually develops a color similar to the actual gum line, significantly improving the aesthetics of the final dental restoration 90 with the color-developing layer 191 forming it. Furthermore, preventing the metal support portion 80 inserted into the lower end of the restoration portion 70 from protruding through the outer side of the restoration portion 70 further enhances the aesthetics.

[0104] Figure 11 This is an example diagram showing the state of a temporary repair body with an attached image correction fixture according to an embodiment of the present invention; Figure 12a and Figure 12b This is an example diagram of the distortion correction process of a temporary restoration image according to an embodiment of the present invention; Figure 13This is an example diagram of a preparatory repair body manufactured according to an embodiment of the present invention.

[0105] Reference Figure 11 Preferably, an image correction jig 10 is attached to the temporary restoration 60. The image correction jig 10 is preferably understood as an auxiliary tool used as a reference to correct distortion error values ​​in the scanned image acquired by the imaging device, thereby manufacturing the dental restoration. The image correction jig 10 is attached and fixed to connect the two molars of the temporary restoration 60. After scanning the temporary restoration 60 including the image correction jig 10 is completed, the image correction jig 10 is detached from the temporary restoration 60. Preferably, the image correction jig 10 includes a support base portion 11, a first alignment protrusion 12, and a second alignment protrusion 13.

[0106] The support base portion 11 extends to both sides with a predetermined length and is configured as a plate shape with a flat top and bottom surface. The first alignment protrusion 12 is a plurality of alignment ribs that protrude in a left-right direction at intervals corresponding to the two sides of the support base portion 11, corresponding to a predetermined first reference spacing. Here, the first reference spacing may include the spacing value between a pair of adjacent alignment ribs and the spacing value between the alignment ribs disposed on both ends of the support base portion 11.

[0107] The second alignment protrusion 13 is a plurality of alignment protrusions that protrude from the outside of the support base portion 11 at intervals in the front-back and left-right directions, corresponding to a predetermined second reference spacing. Here, the second reference spacing may include the left-right spacing between one of the alignment ribs and an adjacent alignment protrusion, and the spacing between a pair of adjacent alignment protrusions at intervals in the left-right and front-back directions. Additionally, the second reference spacing may also include the front-back spacing between one alignment protrusion and the front or rear corner of the support base portion 11.

[0108] Here, the first alignment protrusion 12 and the second alignment protrusion 13 protrude integrally from the support base portion 11, thus effectively fixing the respective spacing values ​​between the first alignment protrusion 12 and the second alignment protrusion 13. Therefore, the image correction fixture 10 can serve as a reference for performing functions during the image correction process described later.

[0109] Furthermore, preferably, the first alignment protrusion 12 protrudes vertically corresponding to a predetermined first reference height. Then, the second alignment protrusion 13 can protrude at a height lower than the first reference height. Here, each of the alignment protrusions of the second alignment protrusion 13 can be formed with different heights, i.e., different radii and different cross-sectional areas.

[0110] Thus, the first alignment protrusion 12 and the second alignment protrusion 13 include points / lines / surfaces of characteristic size, shape, and position that can be clearly matched with the pre-defined three-dimensional corresponding appearance information. Here, the three-dimensional corresponding appearance information refers to the three-dimensional appearance information of the image correction fixture 10, preferably understood to have the same meaning as the virtual correction fixture described later. The virtual correction fixture has been stored in the database 240. That is, by comparing the second auxiliary scan image obtained by scanning the temporary repair body 60 with the image correction fixture 10 attached thereto with the information displayed at the same position on the virtual correction fixture, the three-dimensional distortion error value of the second auxiliary scan image can be corrected.

[0111] Reference Figures 12a to 12b The second auxiliary scan image m1 is acquired by imaging the temporary repair body with the image correction fixture attached by the imaging device. The second auxiliary scan image m1 is transmitted from the imaging device to the planning unit. At this time, in Figures 12a to 12b In this context, it is preferred to understand that m60r represents the modified temporary repair image and m22r represents the modified temporary bonding groove image.

[0112] Preferably, the second auxiliary scanning image m1 includes a temporary restoration image m60, a temporary bonding groove image m22, and a fixture image m10. The temporary restoration image m60 is the three-dimensional surface information of the temporary restoration, and the temporary bonding groove image m22 is the three-dimensional surface information of the recess of the temporary bonding portion. Then, the fixture image m10 is the three-dimensional surface information of the image correction fixture attached to the temporary restoration. Preferably, the fixture image m10 includes a first alignment protrusion image m12 and a second alignment protrusion image m13, that is, the three-dimensional surface information of the first alignment protrusion and the second alignment protrusion. The virtual correction fixture v10 is the design information of the image correction fixture, and has stored the preset size information such as the size, position, and spacing of the first alignment protrusion and the second alignment protrusion.

[0113] Preferably, the virtual movement includes the fixture image m10 of the second auxiliary scan image m1 to match the virtual correction fixture v10 extracted from the database. Then, multiple comparison information is calculated from the fixture image m10. Furthermore, it is preferable to select and calculate multiple reference information from the virtual correction fixture v10 at positions corresponding to the comparison information. Preferably, virtual movement is performed in the forward / backward, left / right, and up / down directions to integrate the comparison information with the reference information. Here, the fixture image m10 and the temporary restoration image m60 are connected as one unit; therefore, if the fixture image m10 is virtually moved, the temporary restoration image m60 is moved in conjunction, thereby correcting the three-dimensional distortion error value of the temporary restoration image m60.

[0114] For example, the first interval e1 of the first aligned protrusion image m12 can be virtually moved in the left-right direction to correspond to the first reference interval of the first virtual protrusion v12 included in the virtual correction fixture v10. The first interval e1 is preferably understood as the distance formed by the left-right spacing between the first aligned protrusion image m12 and the first virtual protrusion v12 due to scanning distortion. Additionally, the second interval e2 and the third interval e3 of the second aligned protrusion image m13 can be virtually moved in the back-forward and left-right directions to correspond to the second reference interval of the second virtual protrusion v13 included in the virtual correction fixture v10. The second interval e2 and the third interval e3 are preferably understood as the distance formed by the back-forward and left-right spacing between the second aligned protrusion image m13 and the second virtual protrusion v13 due to scanning distortion.

[0115] Furthermore, the first aligned protrusion image m12 and the second aligned protrusion image m13 can be virtually moved so that the fourth intervals e4 and e5 of the first aligned protrusion image m12 and the second aligned protrusion image m13 correspond to the reference heights of the first virtual protrusion v12 and the second virtual protrusion v13. The fourth intervals e4 and e5 are preferably understood as the distance between the deformed heights h2 and r5 of the first aligned protrusion image m12 and the second aligned protrusion image m13 due to scanning distortion and the distance between the first virtual protrusion v12 and the second virtual protrusion v13 in the vertical direction. Accordingly, errors caused by the widening of the intervals or image distortion towards the molar side during the scanning of the temporary prosthesis can be corrected. Thus, the positional information of the temporary interposition groove image m22 included in the temporary prosthesis image m60 is corrected to correspond to the actual implantation position, thereby significantly improving image reliability.

[0116] On the other hand, preferably, the temporary restoration image m60r, after correcting the three-dimensional distortion error value, is stored in the planning unit. Then, preferably, a preparatory restoration 160 is manufactured based on the corrected temporary restoration image m60r. The preparatory restoration 160 is a restoration used temporarily during the manufacturing process of the dental restoration. Thus, even if the temporary restoration breaks during the manufacturing of the dental restoration, the corrected temporary restoration image m60r can be loaded from the planning unit, and the preparatory restoration 160 can be manufactured quickly. Therefore, the preparatory restoration can be repeatedly manufactured using the corrected temporary restoration image m60r without the need for additional scanning of the patient's oral cavity or a separate design process during the manufacturing of the dental restoration.

[0117] The preparatory prosthesis 160 is formed based on the temporary prosthesis image m60r, and a preparatory joint portion 162 can be formed at each position corresponding to the temporary joint groove image m22. At this time, the preparatory joint portion 162 can be formed as a through hole, and a separately prepared temporary post 20B can be embedded and fixed in the preparatory joint portion 162.

[0118] Figure 14 This is an example diagram illustrating the fixing process of a temporary column according to an embodiment of the present invention.

[0119] Reference Figure 14 The temporary post 20 is embedded and fixed in the temporary repair body 60 through the following series of processes.

[0120] Specifically, preferably, the temporary post 20 is fastened to the base 9 by the fastening bolt 24. Then, preferably, the temporary restoration 60 is disposed on the target dental arch 2 and occludes with the occlusal dental arch in order to insert the temporary post 20 into the temporary joint 62.

[0121] Preferably, an injection hole 63 is formed laterally through the temporary restoration 60 to communicate with the temporary joint 62. The injection hole 63 can be sized to allow insertion of the injection end of the injection tool 6 for injecting the cured resin 1. Furthermore, it is preferable that the injection hole 63 is formed in a portion corresponding to the premolar. This prevents the injection hole 63 from being exposed when the mouth is open, thus improving aesthetics.

[0122] Preferably, the curing resin 1 is partially injected and cured through the injection hole 63 while the upper and lower jaws are in occlusion, thereby temporarily fixing the temporary post 20 to the inner side of the temporary joint 62. Here, "partial injection" is preferably understood as the amount by which the injection of the temporary post 20 can be partially fixed to the temporary restoration 60 by the curing resin 1. In addition, "temporary fixation" is preferably understood as the temporary post 20 being partially attached to the temporary joint 62 and fixed with a force that does not change the position of the temporary restoration 60.

[0123] If the occlusal arch 3 is separated from the temporary restoration 60 while the temporary restoration 60 is temporarily fixed, the upper part of the temporary joint 62 is exposed. Then, preferably, the exposed upper part of the temporary joint 62 is filled with and cured with the curing resin 1, thereby completely fixing the temporary post 20 within the temporary joint 62.

[0124] Furthermore, alignment and matching fixtures 40 can be designed and manufactured for aligning the temporary restoration 60 and the opposing dental arch 3.

[0125] Specifically, the design information for the temporary restoration and the design information for the alignment fixture, which sets virtual matching slots on the upper and lower surfaces along the occlusal line of the opposing tooth images, can be generated in the planning image. At this time, the virtual matching slots can be set corresponding to the cusp shapes of the teeth in each tooth image and the cusp shapes of the opposing dental arch, which are included in the design information of the temporary restoration.

[0126] Preferably, the design information of the alignment and matching fixture is transmitted to the manufacturing device, and the alignment and matching fixture 40 is then manufactured into a physical object. The alignment and matching fixture 40 can be manufactured using a 3D printer. Then, the cusps of the occlusal arch 3 and the occlusal side of the temporary restoration 60 are matched with matching grooves 42 and 43 respectively formed on the upper and lower surfaces of the alignment and matching fixture 40 for occlusal alignment. The matching grooves 42 and 43 are preferably understood as grooves actually formed on the alignment and matching fixture 40 based on the virtual matching grooves. If the cured resin 1 injected into the injection hole 63 is cured while the upper and lower jaws are aligned through the alignment and matching fixture 40, the temporary post 20 can be temporarily fixed in the temporary joint 62.

[0127] Thus, the temporary post 20 can be temporarily fixed to the temporary joint 62 when the upper and lower jaws are in a preferred occlusal relationship. This significantly improves the occlusal accuracy with the temporary restoration 60 and the opposing dental arch 3. Consequently, the reliability of design information obtained from the scanned images of the temporary restoration 60 is significantly improved, and occlusal accuracy is enhanced when using the temporary restoration 60 during the manufacture of the dental restoration 90, thus significantly improving ease of use. Furthermore, the upper and lower jaws are aligned in the accurate occlusal position by the alignment and matching clamp 40, so excessive occlusal force is not transmitted to the upper and lower jaws. Therefore, the problem of the temporary restoration 60 breaking due to excessive occlusal pressure is fundamentally solved.

[0128] On the other hand, the terms "comprising," "constituting," "having," or "possessing" used above, unless specifically opposed, imply the inclusion of that constituent element. Therefore, they should be interpreted as not excluding other constituent elements, but rather including them. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, unless otherwise defined. Commonly used terms, such as those defined in dictionaries, should be interpreted as having the same meaning as in related technical articles, and should not be interpreted in an excessive manner unless explicitly defined in this invention.

[0129] As described above, the present invention is not limited to the various embodiments described above. Instead, modifications can be made by those skilled in the art without departing from the scope of protection claimed in the claims of the present invention. Such modifications are within the scope of the present invention.

Claims

1. A method of manufacturing a dental restoration, comprising: a first step of, in order to design a dental restoration, setting implant information of implants on a planning image generated by a planning section, generating design information of a provisional restoration in which a virtual provisional joint is set at each of the implant information based on the planning image; a second step of, the design information of the provisional restoration being transmitted to a manufacturing device, manufacturing a provisional restoration formed with a provisional joint corresponding to the virtual provisional joint, and correcting a position of the provisional joint to correspond to a position of an implant implanted in an object dental arch; a third step of forming a confirmation model, the confirmation model being aligned with a fixed position of a plurality of general insertion grooves of a simulation body formed at intervals in a base model using the provisional restoration, a first auxiliary scan image of the confirmation model being acquired by an imaging device and transmitted to the planning section; a fourth step of, a virtual restoration section in which a plurality of tooth images are sequentially arranged with a set dentition structure being set by the planning section, a virtual support section extracted from a database being virtually moved to the planning section to be virtually overlaid on a lower portion of the virtual restoration section, and a position of a virtual joint included in the virtual support section being virtually corrected based on the first auxiliary scan image; a fifth step of, the virtual support section and an overlapped portion of the virtual support section being removed being set as a virtual restoration section of a virtual assembly groove, the virtual restoration section being transmitted to the manufacturing device to be manufactured as a metal support section and a restoration section, respectively, the metal support section being assembled and fixed in an assembly groove formed in the restoration section, and a dental restoration being finally manufactured.

2. The method of manufacturing a dental restoration according to claim 1, wherein in the third step, the confirmation model is formed by steps including: the simulation bodies are fastened to the provisional joint, respectively; lower end portions of the respective simulation bodies are inserted into the general insertion grooves; the general insertion grooves are filled and cured with a curing resin, and the simulation bodies are fixed in the general insertion grooves corresponding to the positions of the implanted implants; the provisional restoration is separated.

3. The method of manufacturing a dental restoration according to claim 2, wherein the third step includes steps of: the simulation bodies fixed in the respective general insertion grooves are fastened to a column to project the column upwardly and fix the column; the imaging device is moved along inner and outer side surfaces of the confirmation model including the column to acquire the first auxiliary scan image; the fifth step includes steps of: in order to check a position of the joint, the metal support section is combined with an upper side of the confirmation model from which the column is separated.

4. The method of manufacturing a dental restoration according to claim 3, wherein the fourth step includes steps of: a virtual column is extracted from the database to be virtually moved to the planning section; a column image displayed on the first auxiliary scan image is virtually replaced by the virtual column; positions of the respective virtual joints are virtually corrected based on the virtual column. ​ 5. The method of claim 2, wherein, in the third step, the general insertion groove is formed in the base model in accordance with the implant information, and is formed with an inner diameter and a depth recessed by a margin including a correction interval of the temporary coupling portion.

6. The method of claim 1, wherein, in the second step or the third step, the second step or the third step includes a step of: attaching image correction jigs, in which a plurality of alignment protrusions are protruded outward in front and rear and left and right directions, to both sides of the temporary restoration on molar sides; acquiring a second auxiliary scan image of the temporary restoration to which the image correction jigs are attached by imaging the temporary restoration through the imaging device, and transmitting the second auxiliary scan image to the planning portion; virtually moving jig images included in the second auxiliary scan image to match virtual correction jigs extracted from the database; and correcting temporary restoration images in linkage with the jig images, thereby correcting distortion error values of the temporary restoration images.

7. The method of claim 6, wherein, in the second step or the third step, the second step or the third step includes a step of: selecting and calculating comparison information from scan images of the alignment protrusions included in the jig images, and selecting and calculating reference information in virtual images of the alignment protrusions included in the virtual correction jigs at positions corresponding to the comparison information; and virtually moving the comparison information in front and rear, left and right, and up and down directions to integrate with the reference information, while correcting three-dimensional distortion error values.

8. The method of claim 6, wherein, in the second step or the third step, the image correction jigs include: first alignment protrusions, in which a plurality of the first alignment protrusions are spaced apart in left and right directions corresponding to a first reference interval set; and second alignment protrusions, in which a plurality of the second alignment protrusions are spaced apart in front and rear directions corresponding to a second reference interval set; and the virtual correction jigs are three-dimensional appearance information of the image correction jigs, which are stored in the database.

9. The method of claim 1, wherein, in the second step, the second step includes a step of: fastening temporary posts to the implants; arranging the temporary restoration on the object dental arch so as to occlude the temporary restoration with the opposing dental arch, in order to insert the temporary posts into the temporary coupling portions formed in the temporary restoration in up and down directions; partially injecting and curing a curing resin through injection holes formed in lateral directions so as to communicate with the temporary coupling portions, in order to temporarily fix the temporary posts; and filling and curing the curing resin at upper portions of the temporary coupling portions exposed by spacing the opposing dental arch, in order to completely fix the temporary posts.

10. The method of claim 9, wherein, in the second step, the second step further includes a step of: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ design information of the temporary restoration and design information of the alignment matching jig in which virtual matching portions corresponding to the respective cusp shapes along the occlusal line of the occlusal side tooth image are set in the upper and lower surfaces are generated by the planning unit; the design information of the alignment matching jig is transmitted to the manufacturing device to manufacture the alignment matching jig; the cusp portions of the occlusion arch and the occlusal side of the temporary restoration are occlusally aligned by matching to the matching portions formed in the upper and lower surfaces of the alignment matching jig, respectively; the solidified resin is injected through the injection hole.

Images