KR20230054527A - division type digital dental prosthesis and manufacturing method thereof - Google Patents

Abstract

The present invention provides a manufacturing method of split-type digital prosthetics to improve manufacturing precision and durability. The manufacturing method comprises: a first step in which a virtual prosthetic base is set based on a planning image; a second step in which a virtual bridge base is virtually arranged to be continuously overlapped along a lower end of the virtual prosthetic base; a third step in which the virtual prosthetic base and the virtual bridge base are simultaneously virtual divided based on a virtual split surface so that a plurality of virtual split prosthetic units and a virtual split bridge are created; and a fourth step in which a split prosthetic unit and a split metal bridge are each manufactured based on a created virtual image, and each split metal bridge is assembled and fixed to each split prosthetic unit. Accordingly, prosthetics can be firmly fixed in the oral cavity, and durability thereof can be significantly improved.

Description

Division type digital prosthesis and manufacturing method thereof {division type digital dental prosthesis and manufacturing method thereof}

The present invention relates to a segmented digital prosthesis and a method for manufacturing the same, and more particularly, to a segmented digital prosthesis with improved manufacturing precision and durability and a method for manufacturing the same.

In general, a dental prosthesis is an artificial periodontal tissue in the oral cavity that artificially restores appearance and function by replacing missing natural teeth. That is, the prosthesis can be installed inside the oral cavity to restore the chewing function and prevent deformation of the periodontal tissue. The prosthesis may be classified into a partial prosthesis or a complete prosthesis according to the number of missing teeth.

Such a prosthesis may be installed inside the oral cavity through an implant placed in the alveolar bone. Therefore, the problem of causing deformation of the gum or causing a large amount of foreign body sensation due to the conventional denture being fixed with an adhesive and being directly supported by the gum can be solved. Accordingly, in recent years, the use of the prosthesis for the purpose of replacing dentures is increasing.

On the other hand, the prosthesis is assembled after separately manufacturing the artificial tooth part and the coupling part in consideration of the external aesthetics, the occlusion pressure with the target tooth, or the support strength for the coupling force with the coupling means. In detail, the artificial tooth part is a part that occludes with the opposing tooth to chew food, and is made of oligomer acrylic material or zirconia material. And, the coupling portion is formed of a metal material as a portion that is engaged between the abutment fastened to the upper end of the implant and the fastening screw. Therefore, the coupling portion is not deformed or damaged even with strong coupling force between the abutment and the fastening screw, and the prosthesis can be firmly fixed to the oral cavity. At this time, as the number of implants to be placed increases, the prosthesis can be accurately and firmly fixed to the oral cavity.

Here, a coupling groove into which the upper end of the abutment and the fastening screw are inserted is formed in the coupling portion at each location where the implant is placed. In addition, an assembly groove into which the coupling part is inserted and fixed is formed on the inner surface of the artificial tooth part. At this time, a communication hole communicating with the assembly groove is formed in the artificial tooth portion so that the fastening screw is penetrated and inserted into the coupling groove.

On the other hand, the implant is formed in a different direction according to each position in consideration of the anatomical structure of the oral cavity and alveolar bone density. That is, the implant is placed inclined in a predetermined direction rather than placed vertically. In addition, the placement direction and angle of the implant is different on the anterior and posterior teeth.

Here, when the coupling part is formed in an arcuate continuous integral form from the anterior tooth side to the molar side, the central portion on the anterior tooth side and both ends on the molar side must be twisted at different angles to correspond to the implant placement direction and angle. At this time, the coupling part is formed of a metal material, but there is a problem in that it is difficult to precisely process the twisted shape during metal processing such as milling.

In addition, the assembly groove should also be formed in consideration of the shape manufactured by twisting the coupling groove, and is formed including a margin excessively larger than the volume of the actual coupling portion. Due to this, the thickness of the artificial tooth portion is relatively thin, and there is a problem in that the support strength for the mastication pressure is lowered. Moreover, twist angles of the central portion and both ends of the coupling portion are different. Therefore, interference occurs when assembling the coupling part into the assembly groove, and it is difficult to accurately align the coupling groove and the communication hole.

Thus, a technique for dividing the coupling part into a plurality of at least two or more has been partially disclosed. In detail, the coupling portion is spaced apart along the dental arch and provided with a plurality, and at least one coupling groove is formed in each coupling portion. In addition, the artificial tooth portion is formed by partitioning an assembly groove into which a plurality of coupling portions are respectively assembled.

Here, each of the coupling parts is formed to extend in the direction of the dental arch on the outside after the location of the coupling groove is determined, and its shape is individually designed according to each patient. As a result, the overall design period of the prosthesis increases, and as the design process becomes complicated, there is a problem in that it takes a long time to manufacture the prosthetic.

In addition, an impression model of the oral cavity of the patient is required in order to determine the accuracy of each of the separately designed and manufactured coupling parts. As a result, the overall manufacturing process of the prosthesis increases, and there is a problem in that discomfort is increased due to the patient repeatedly visiting the dentist to manufacture the impression model. Moreover, as each of the coupling parts is spaced apart, a spaced portion in which the artificial tooth portion is not supported by the coupling portion is generated. For this reason, when strong chewing pressure is applied to the artificial tooth portion, there is a problem in that a portion corresponding to the separation portion is fractured.

Korean Patent Registration No. 10-1947635

In order to solve the above problems, an object of the present invention is to provide a segmented digital prosthesis with improved manufacturing precision and durability and a method for manufacturing the same.

In order to solve the above problems, the present invention is that the planning image including the three-dimensional surface information of the target arch acquired through the imaging device is generated through the planning unit, and a plurality of tooth images are successively arranged in a preset dental structure. A first step of setting a virtual prosthetic base based on the planning image; A virtual bridge base set so that the virtual coupling parts, which are virtually aligned at positions corresponding to the placement information of a plurality of preset implants along the direction of the dental arch, are continuously connected through virtual extensions, are extracted from the digital library, loaded into the planning unit, and then loaded into the virtual prosthesis. A second step that is virtually arranged so as to continuously overlap along the bottom center and both ends of the base; A virtual assembly groove is set at a portion where the virtual bridge base overlaps in the virtual prosthetic base, and a virtual dividing surface is set at a dividing point at which the virtual prosthetic base and the virtual bridge base are spaced apart in plurality along the direction of the dental arch. a third step of generating a plurality of virtual split prosthetic parts and virtual split bridges by simultaneously virtual splitting on a reference basis; and a plurality of the virtual divided prosthetic parts and virtual divided bridges are transmitted to a manufacturing device to manufacture real divided prosthetic parts and divided metal bridges, respectively, and each of the divided metal bridges is assembled and fixed to the divided prosthetic parts to form a divided type. Provided is a method for manufacturing a segmented digital prosthesis including a fourth step in which the digital prosthesis is finally manufactured.

Meanwhile, in the present invention, based on the planning image including the 3D surface information of the target arch, the appearance is set in correspondence with the virtual prosthetic base in which a plurality of tooth images are continuously arranged in a preset dental structure, but along the direction of the dental arch. An assembly groove corresponding to the outer shape of the virtual bridge base is formed on the inner surface of the lower part so that the virtually arranged virtual coupling part corresponding to the placement information of the plurality of preset implants is continuously and integrally connected through the virtual extension part, and the gap between the tooth images is formed. divided prostheses divided on the basis of a virtual dividing surface set between a plurality of selected virtual teeth as at least one of the virtual teeth, and provided in a plurality; and a plurality of coupling portions coupled to the implant based on the virtual bridge base and a plurality of extension portions integrally connecting the coupling portions, wherein at least one of the plurality of extension portions is the virtual division Provided is a split type digital prosthesis including split metal bridges divided on a plane basis and provided in plurality.

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

First, since the divided prosthetic part and the divided metal bridge are divided and formed according to the grouped segmented area of the adjacent implantation information having the minimum implanted angle by comparing the implantation angle calculated for each tooth position, the divided prosthetic part and the segmented metal Since the coupling direction between the bridges is set constant without distortion in the longitudinal direction, interference during assembly can be minimized.

Second, even if the angle of implantation for each tooth position is formed differently along the direction of the dental arch, as the coupling parts with the minimum angle error between neighbors are grouped and formed separately, it is possible to assemble without interference even if the number of implants is increased up to 8. Therefore, by placing multiple implants, the prosthesis can be firmly fixed in the oral cavity.

Third, despite the fact that the prosthesis is divided and formed by being inserted into the assembly groove continuously opened in the lower part of the divided prosthetic part along the direction of the dental arch, the two adjacent ends of the divided metal bridge are extended in a substantially continuous arrangement structure so that they are adjacent to each other with a minimum gap. And as the lower part is continuously supported, the durability against the mastication pressure can be remarkably improved.

Fourth, since the virtual division plane that virtually divides the integrated design image along the direction of the dental arch is set based on the virtual interdental space between each tooth image, even if the divided prosthetic part is divided into a plurality of parts, each artificial tooth substantially maintains continuity, so that integral complete prosthesis and By having a similar appearance, a high-quality prosthesis with improved aesthetics can be provided.

1 is a flowchart of a method for manufacturing a segmented digital prosthesis according to an embodiment of the present invention.
2 is a block diagram of a manufacturing system for a segmented digital prosthesis according to an embodiment of the present invention.
3 is an exemplary view showing a planning image applied to a method for manufacturing a segmented digital prosthesis according to an embodiment of the present invention;
4 is an exemplary diagram illustrating a process of setting placement information in a method of manufacturing a segmented digital prosthesis according to an embodiment of the present invention.
5A and 5B are exemplary diagrams illustrating a process of generating a virtual split prosthetic part and a virtual split bridge in the manufacturing method of a split type digital prosthesis according to an embodiment of the present invention.
6A is a projected bottom view of a segmented prosthesis fabricated according to a manufacturing method of a segmented digital prosthesis according to an embodiment of the present invention;
6B is a partially cut-away perspective view of a split metal bridge manufactured according to a method for manufacturing a split-type digital prosthesis according to an embodiment of the present invention.
7A and 7B are exemplary diagrams illustrating a manufacturing process of a final segmented digital prosthesis in the method of manufacturing a segmented digital prosthesis according to an embodiment of the present invention.
8 is a cross-sectional view of a segmented digital prosthesis manufactured through a manufacturing method of a segmented digital prosthesis according to an embodiment of the present invention.
9 is an exemplary view showing a virtual prosthetic base and a virtual correction base in the manufacturing method of a segmented digital prosthesis according to an embodiment of the present invention.
10 is an exemplary diagram illustrating a segmented digital prosthesis according to another embodiment of the present invention.

Hereinafter, a segmented digital prosthesis and a manufacturing method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

On the other hand, the target arch to be described below is preferably understood as a jaw that requires dental restoration treatment through the split-type digital prosthesis, and the opposing arch is preferably understood as a jaw that occludes with the target arch. At this time, in the present invention, the target arch is the lower jaw, which is the edentulous jaw, and the opposing arch is explained and illustrated as the upper jaw, which is the dentulous jaw. Of course, in some cases, the present invention may also be applied to manufacturing a segmented digital prosthesis installed when the upper jaw is edentulous or when both the upper and lower jaws are edentulous. Here, the segmented digital prosthesis is preferably understood as a prosthesis manufactured by dividing a complete prosthetic into at least two or more pieces along the direction of the dental arch. Hereinafter, the segmented digital prosthesis will be described and illustrated as being divided into three parts into anterior teeth and both molars.

1 is a flowchart of a method for manufacturing a segmented digital prosthesis according to an embodiment of the present invention, and FIG. 2 is a block diagram of a manufacturing system for a segmented digital prosthesis according to an embodiment of the present invention. And, FIG. 3 is an exemplary view showing a planning image applied to the method of manufacturing a segmented digital prosthesis according to an embodiment of the present invention.

Referring to FIG. 1 , in the method of manufacturing a segmented digital prosthesis according to an embodiment of the present invention, a virtual prosthetic base is set based on a planning image (step 1011), so that the virtual bridge base overlaps the bottom of the virtual prosthetic base. Step 1012 of virtual arrangement, step 1013 of creating a virtual split prosthetic part and virtual split bridge divided on the basis of the virtual split plane, manufacturing and assembling the real split prosthetic part and split metal bridge to form a split digital prosthesis This final fabrication step 1014 includes.

Referring to FIGS. 2 and 3 , the method of manufacturing a segmented digital prosthesis is performed through a manufacturing system 200 including an imaging device 210, a planning unit 220, and a manufacturing device 230. preferably performed.

The imaging device 210 is a device for acquiring 3D information about the oral cavity, and it is preferable to understand that the 3D information of the oral cavity includes 3D surface information of the oral cavity and alveolar bone information. Here, it is preferable to understand that the 3D surface information of the oral cavity includes 3D surface information (m2) of the target arch and 3D surface information (m3) of the opposing arch. In addition, the imaging device 210 is preferably understood as a concept encompassing a scanner capable of acquiring the 3D surface information (m2, m3) of the oral cavity and a CT imaging device capable of acquiring the alveolar bone information (m4). do.

In detail, it is preferable that 3D surface information (m2, m3) of the outer surfaces of the target arch and the opposing arch is acquired as images by using the scanner. Here, surface information on the outer surface of the gum portion of the target arch may be included in the 3D surface information m2 of the target arch as a 3D image. The 3D surface information m3 of the dental arch may include surface information about the outer surface of the residual tooth or gum portion of the dental arch as a 3D image. And, it is preferable that the alveolar bone information m4 is acquired as a 3D image using the CT imaging device. From the alveolar bone information m4, the shape, curvature, and density of the alveolar bone and the position of the lower alveolar nerve can be confirmed and calculated.

It is preferable to understand that the planning unit 220 is a computer device that collects, calculates, and models information transmitted from an external device through wired/wireless communication and information previously stored in the digital library 240 . Here, it is preferable to understand that the digital library 240 is a database in which basic shape information of components required for dental restoration is stored as 3D vector data. The digital library 240 includes a plurality of three-dimensional appearance information on the real implant and the real abutment, and also includes a plurality of digital appearance information on the virtual bridge base and the virtual prosthetic base (m170). this is preferable In the case of the implant and the abutment, this 3D shape information may be pre-stored as a plurality of vector images having length, diameter, angle, etc. as optional items. In addition, in the case of the virtual bridge base and the virtual prosthetic base m170, the 3D external information may be pre-stored as a plurality of vector images including the size of the teeth, the shape of the dental arch, and the like as optional items.

In addition, the 3D surface information (m2, m3) and the alveolar bone information (m4) of the target arch and the opposing dental arch acquired through the imaging device 210 are loaded into the planning unit 220 to form a 3D image. displayed In addition, through the planning unit 220, the 3D surface information (m2, m3) and the alveolar bone information (m4) of the target arch and the opposing arch are aligned to correspond to a preset vertical diameter (VD), and the planning image (m1). Here, it is preferable to understand that the planning image m1 is an image including basic oral information for obtaining design information of the segmented digital prosthesis.

It is preferable to understand that the manufacturing device 230 is a device that manufactures the divided prosthetic part and the divided metal bridge, which will be described later, according to the design information of the divided digital prosthesis. At this time, the manufacturing apparatus 230 applied to the present invention preferably includes a small CNC lathe or a 3D printer for manufacturing the divided prosthetic part. In addition, it is preferable to understand that the manufacturing device 230 includes a milling device for processing a titanium block to be described later according to the design information of the divided metal bridge.

4 is an exemplary diagram illustrating a process of setting implantation information in a method of manufacturing a segmented digital prosthesis according to an embodiment of the present invention.

Referring to FIGS. 3 and 4 , it is preferable that implant placement information (m5) is set based on the planning image (m1). Here, it is preferable to understand that the implant is a fixture placed in the alveolar bone in order to fix the segmented digital prosthesis to the oral cavity.

Preferably, the placement information m5 is set to correspond to a predetermined placement angle for each tooth position of the target arch. In detail, the placement angle is preferably set according to the direction in which each tooth, such as the anterior teeth, canines, posterior teeth, etc., can be preferably occluded with the opposing arch and the overall shape of the alveolar bone calculated from the alveolar bone information m4. Accordingly, the implantation angle may be set differently for each tooth position according to the direction of each tooth and the overall shape of the alveolar bone.

The placement angle may be calculated and set from an arrangement angle of each tooth image, which will be described later. For example, since the anterior teeth are virtually arranged in a direction protruding forward toward the occlusion end of each tooth image, the placement angle may be set to be inclined forward. And, since each tooth image on the posterior tooth is inclined at a smaller angle than the tooth image on the anterior tooth side, the implantation angle can be set close to the vertical direction.

5A and 5B are exemplary diagrams illustrating a process of generating a virtual split prosthesis and a virtual split bridge in the manufacturing method of a split-type digital prosthesis according to an embodiment of the present invention.

4 to 5B, the virtual prosthetic base m170 is set on the planning image m1, and the virtual bridge base m80 is virtually arranged to overlap the lower end of the virtual prosthetic base m170. this is preferable

In detail, it is preferable to understand that the virtual prosthetic base m170 is three-dimensional external information in which a plurality of tooth images m171 are continuously arranged in a preset dental structure. At this time, each of the tooth images m171 may be set as 3D vector data for a standard shape of an actual tooth, and may be set in a virtual arrangement according to the dental structure. That is, it is preferable to understand that the virtual prosthetic base m170 is a set and stored of the plurality of tooth images m171.

Preferably, the virtual prosthetic base m170 is previously stored in the digital library. Here, while the plurality of tooth images m171 are set and simultaneously loaded and moved from the digital library to the planning unit, the position, angle, and size of each tooth image m171 can be individually adjusted to suit each patient.

Preferably, the virtual prosthetic base m170 is virtually disposed above the 3D surface information m2 of the target arch included in the planning image m1. In addition, the virtual prosthetic base m170 preferably has the arrangement position and direction of each tooth image m171 adjusted in correspondence with the direction of the dental arch calculated from the 3D surface information m2 of the target arch. Through this, the precision of mastication can be remarkably improved in a state where the finally manufactured segmented digital prosthesis is installed in the oral cavity of the patient.

And, it is preferable that the placement information m5 is set to pass through the center of the longitudinal direction of the pre-selected tooth image m171 among the plurality of tooth images m171. At this time, it is preferable to set a plurality of tooth images m171 through which the placement information m5 penetrates, and may be set to 4 to 8. In addition, the implantation information m5 may be inclined at the above angle for each position of the tooth image m171 pre-selected according to the implantation angle for each tooth position.

The virtual bridge base m80 is extracted from the digital library and loaded into the planning unit. Also, it is preferable that the virtual bridge base m80 is virtually arranged to continuously overlap along the lower central portion and both ends of the virtual prosthetic base m170. That is, the virtual bridge base m80 may be virtually arranged as continuous integrated three-dimensional outer appearance information from the anterior tooth image m171 to the molar tooth image m171 of the virtual prosthetic base m170.

At this time, it is preferable to understand that the virtual bridge base m80 is three-dimensional outer shape information in which a plurality of virtual coupling parts m81 are integrally connected through a plurality of virtual extension parts m88. In detail, the virtual bridge base m80 is preferably set to 3D vector data in which the virtual coupling part m81 and the virtual extension part m88 are set, and is pre-stored in the digital library. Here, the virtual coupler m81 and the virtual extension unit m88 are set and loaded and moved from the digital library to the planning unit at the same time, but the position of each virtual coupler m81 is the placement information ( m5) can be individually adjusted to correspond. In addition, each of the virtual extensions m88 may also be individually adjusted corresponding to the adjusted position of each of the virtual coupling parts m81.

At this time, it is preferable to understand that the virtual coupling part m81 is design information for the coupling part coupled to the upper end of the implant. It is preferable to understand that the coupling part includes a structure coupled directly to the upper end of the implant and a structure coupled to the post of the abutment fastened to the upper end of the fixture. Hereinafter, the virtual coupling part m81 will be described and illustrated in a shape matching the post m10a of the virtual abutment m10, which is the three-dimensional outer shape information of the abutment.

It is preferable that the virtual coupling part (m81) includes a virtual coupling groove (m82), a virtual through portion (m83) and a virtual stepped portion (m84).

In detail, the virtual coupling groove (m82) is the design information of the coupling groove formed in the actual coupling part, and it is preferable to set it in a recessed shape matching the outer shape of the post (m10a) of the virtual abutment (m10). do. Also, the virtual through part m83 is design information of a through part formed in an actual coupling part, and is preferably set to communicate with the virtual coupling groove m82. It is preferable that the virtual penetrating part m83 is set in a cylindrical shape with a depth such that the head of a fastening screw, which will be described later, is completely accommodated and does not protrude upward. The virtual stepped part (m84) is design information of the stepped part formed on the actual coupling part, and is preferably set to protrude radially inward along the boundary of the virtual coupling groove (m82) and the virtual through-hole (m83). . It is preferable that the center of this virtual coupling part m81 is virtually adjusted to correspond to each of the placement information m5.

Also, it is preferable that the virtual extension part m88 be virtually extended to integrally connect the virtual couplers m81 adjacent to each other. Here, the virtual extension part m88 may be virtually extended in a bar shape having a square cross section. The virtual extension part m88 may have a height less than or equal to the maximum height of each virtual coupling part m81 and a cross-sectional thickness less than or equal to the maximum diameter of each virtual coupling part m81.

It is preferable that the virtual prosthetic base m170 and the virtual bridge base m80 are continuously virtually arranged along the entire dental arch direction. In addition, it is preferable that the virtual prosthetic base m170 and the virtual bridge base m80 are simultaneously virtually divided based on a virtual dividing surface m7 that is spaced apart from each other along the direction of the dental arch.

In detail, it is preferable to understand that the virtual dividing surface m7 is a virtual plane set at at least one or more spaced apart dividing points along the direction of the dental arch. Here, it is preferable that the dividing point be set at at least one virtual interdental interval (m173) selected from a plurality of virtual interdental intervals (m173) between the plurality of tooth images (m171). In addition, the virtual dividing surface m7 is preferably set as a virtual plane disposed in a lingual direction from the labial or buccal side based on the pre-selected virtual interdental m173 and extending in the vertical direction.

As such, since the virtual division surface m7 is virtually arranged based on the virtual interdental space m173 between the tooth images m171, the shape of each tooth image m171 can be substantially maintained. In addition, since the virtual prosthesis base m170 is set according to the continuous dental structure and then virtually divided based on the virtual dividing surface m7, the virtual prosthetic base m170 is divided into a plurality of teeth, but each tooth image m171 ) can substantially maintain continuity.

Therefore, even if the finally manufactured segmented digital prosthesis is manufactured by being divided into a plurality of pieces and installed in the oral cavity, it may have a substantially similar appearance to the integrated complete prosthesis. Through this, by receiving a high-quality segmented digital prosthesis with improved aesthetics, the patient's satisfaction with use can be remarkably improved. In addition, since each artificial tooth included in the segmented digital prosthesis itself is not divided, durability against mastication pressure can be remarkably improved.

On the other hand, among the mutually adjacent placement information m5, at least one placement information m5 whose placement angle is included within a preset angle error range is grouped and set to a plurality of divided areas m8a, m8b, and m8c. desirable. For example, as shown in FIG. 5A, a plurality of the placement information m5 set adjacent to each posterior tooth along the dental arch direction may be grouped and set into posterior tooth partition regions m8b and m8c, respectively. In addition, the plurality of placement information m5 set adjacent to the anterior tooth along the dental arch direction may be grouped and set as an anterior tooth-side partitioned area m8a.

And, it is understood that the virtual plane intersecting the virtual extension part m88 between the respective division areas m8a, m8b, and m8c of the virtual division surface m7 is virtually arranged in the labial or buccal direction and the lingual direction. desirable. At this time, it is preferable that the virtual plane crosses the virtual extension part m88 and at the same time crosses the virtual interdental part m173 virtually disposed within the longitudinal range of the virtual extension part m88.

Therefore, the virtual partitioning surface m7 extends between the virtual interdental zone m173 preset between the mutually neighboring partitioning areas m8a, m8b, and m8c and between the mutually neighboring partitioning areas m8a, m8b, and m8c. It can be placed virtually across the virtual extension (m88) at the same time.

Preferably, a virtual assembly groove m177 is set at a portion of the virtual prosthetic base m170 overlapping the virtual bridge base m80. Also, it is preferable that the virtual prosthetic base m170 and the virtual bridge base m80 are simultaneously virtual divided based on the virtual division surface m7 to create a plurality of virtual divided prosthetic parts and virtual divided bridges. It is preferable to understand that the virtual split prosthetic unit is design information of a split prosthetic unit to be described later, and the virtual split bridge is design information of a split metal bridge to be described later.

In detail, a mutually overlapping portion of the virtual prosthesis base m170 and the virtual bridge base m80 may be set as an overlapping area, and as the overlapping area is erased from the virtual prosthesis base m170, the virtual assembly groove (m177) can be set. It is preferable to understand that the virtual assembly groove m177 is design information of an assembly groove to be described later. As such, since the virtual assembly groove m177 is set based on the virtual bridge base m80, the coupling precision between the finally manufactured divided metal bridge and the assembly groove can be significantly improved.

At this time, it is preferable that the virtual assembly groove m177 is set to include an extra interval considering an assembly error between the divided metal bridge and the assembly groove. Therefore, even if the divided metal bridge made of a metal material having a low strain by external force is assembled to the prosthetic split part made of zirconia, damage or breakage of the prosthetic split part due to interference can be prevented. In addition, since the application interval of the adhesive for attaching and fixing the divided metal bridge to the assembly groove is secured, the fixing force can be remarkably improved.

In addition, a virtual communication hole m172 communicating with the virtual assembly groove m177 may be set. The virtual communication hole m172 is design information of a communication hole to be described later, and may be set corresponding to the implantation information m5. That is, the virtual communication hole m172, the virtual through portion m83, and the virtual coupling groove m82 may be substantially communicated with each other. In addition, the fastening screw may be inserted through the communication hole and coupled to the coupling part.

At this time, the virtual assembly groove m177 is continuously set along the dental arch direction of the virtual prosthetic base m170 and then divided based on the virtual dividing surface m7. Through this, adjacent end sides of the virtual assembly grooves m177 set in each prosthetic segment can be set as virtual openings communicating in the direction of the dental arch.

Then, the virtual extension part m88 is continuously set along the dental arch direction of the virtual bridge base m80 and then divided based on the virtual dividing surface m7. Through this, the virtually divided virtual extension part m88 can be set as a virtual support end extending from the virtual coupling part m81 included in each of the virtual split bridges to the virtual split surface m7.

As such, according to the present invention, the virtual prosthetic base m170 and the virtual bridge base m80 are set as continuous 3D image data along the direction of the dental arch, and then virtually divided based on the virtual dividing surface m7. Accordingly, the mutually adjacent ends of each of the virtual divided prosthesis parts and the mutually adjacent ends of each of the virtual divided bridges may be divided but set in a substantially continuous arrangement.

Meanwhile, a horizontal alignment line m6 may be set outside the vertical direction of the 3D surface information m2 of the target arch. At this time, it is preferable to understand that the outer side in the vertical direction is a specific position spaced apart from the 3D surface information m2 of the target arch toward the opposite arch side. That is, the alignment line m6 may be set across a space where teeth are disposed between the upper and lower jaws.

And, the post length of the virtual abutment m10 is selected as a standard corresponding to the separation distance between the alignment line m6 and the 3-dimensional surface information m2 of the target arch, and is extracted from the digital library. desirable. In this case, the separation distance may be calculated for each location corresponding to the placement information m5. Further, the post length of the virtual abutment m10 may be selected and extracted from the digital library by using the distance calculated for each position corresponding to the implantation information m5 as a selection item. Here, the virtual abutments m10 are virtually arranged corresponding to the implantation information m5, and in the virtual coupling part m81, the virtual coupling groove m82 is the post of the virtual abutment m10. It can be arranged virtually to match (m10a).

In detail, the virtual abutment m10 may be virtually aligned to correspond to the alignment line m6. For example, the upper end of the post m10a of the virtual abutment m10 may be virtually aligned to match the alignment line m6. At this time, the alveolar bone information is formed as an irregular surface, and an alveolar bone height difference occurs between parts corresponding to the implantation information (m5). Therefore, when the virtual abutment m10 is virtually overlapped with the virtual bridge base m80, the post of the virtual abutment m10 is spaced according to the post length of the virtual abutment m10. (m10a) may be partially exposed.

Here, it is preferable that the length of the virtual cover extension m85 protruding downward along the edge of the virtual coupling groove m82 is set so that the outer surface of the virtual abutment m10 exposed at the spaced interval is covered. do. Preferably, the virtual cover extension part m85 is set to extend corresponding to the post length of the virtual abutment m10 exposed at the spaced interval. And, it is preferable that the end of the virtual cover extension part m85 is set to match the marginal part of the virtual abutment m10.

Through this, when the real divided metal bridge is fixed to the upper end of the implant, the post of the real abutment is prevented from being exposed to the outside, so that aesthetics can be remarkably improved. In addition, a cover extension formed in real life based on the virtual cover extension (m85) may substantially shield the post of the abutment. Through this, it is possible to prevent foreign matter from penetrating between the coupling groove and the post of the abutment.

Moreover, the substantial upper and lower thickness of the divided metal bridge can be formed to a minimum, and each of the divided prosthesis parts can be inserted only on the root side. Through this, projection of the divided metal bridge onto the divided prosthetic part made of zirconia or an oligomer resin material can be prevented, and aesthetics can be remarkably improved.

In addition, the virtual coupling part m81 and the virtual extension part m88 are designed in a simple way in which standard design information pre-stored in the digital library is loaded and virtually arranged at a position corresponding to each placement information m5. In addition, the cross-sectional shape of the virtual extension part m88 is set to simplified design information corresponding to a square. Therefore, since design information of the virtual assembly groove m177 set in correspondence with the virtual bridge base m80 as well as design information of the virtual bridge base m80 is simplified and streamlined, design convenience and speed can be remarkably improved. there is.

6A is a projected bottom view of a segmented prosthetic part manufactured according to the manufacturing method of a segmented digital prosthesis according to an embodiment of the present invention, and FIG. It is a partially cut-away perspective view of the manufactured split metal bridge.

5A to 6B, the virtual split prosthetic part and the virtual split bridge are transmitted to the manufacturing device, and the real split prosthetic part 170a, 170b, 170c and the real split metal bridge 80a, 80b , 80c) are preferably prepared respectively. At this time, in the present invention, the divided prosthetic parts 170a, 170b, and 170c are described and illustrated as being made of a zirconia material as an example. Of course, in some cases, the split prosthesis parts 170a, 170b, and 170c may be made of an oligomer resin material, and generally, any material used to manufacture prosthetic artificial teeth falls within the scope of the present invention.

In detail, referring to FIG. 6A , the divided prosthesis parts 170a, 170b, and 170c preferably include an artificial tooth part 171 and the assembly groove 177, and a communication hole communicating with the assembly groove 177. (172) may be formed through the position corresponding to the placement information.

At this time, it is preferable that an opening 178 opened from the assembly groove 177 toward the dental arch is formed at the adjacent end side of each of the divided prosthesis parts 170a, 170b, and 170c. Accordingly, the assembly grooves 177 formed in the divided prosthesis parts 170a, 170b, and 170c may continuously communicate in the direction of the dental arch.

Here, it is preferable that the divided prosthetic parts 170a, 170b, and 170c are formed by CNC machining a zirconia block corresponding to the 3D design information of the virtual divided prosthetic part. That is, when the zirconia block is milled into a shape corresponding to the design information with a milling machine dedicated to manufacturing dental restorations and then fired at a predetermined temperature, the split prosthesis parts 170a, 170b, and 170c can be actually manufactured. . Here, it is preferable to understand that the zirconia block is manufactured in a block shape by injecting a mixture of zirconia-based materials including zirconia powder into a compression molding mold and applying a constant pressure.

And, referring to FIG. 6B, the divided metal bridges 80a, 80b, and 80c preferably include the coupling portion 81 and the extension portion 88. In detail, the coupling portion 81 preferably includes the coupling groove 82, the through portion 83, and the stepped portion 84.

The coupling groove 82 is a portion into which the post of the abutment is inserted, and is formed with an opening on one side of the upper and lower sides of the coupling portion 81 . The through portion 83 is a portion into which the fastening screw is inserted, and is opened to the other side of the coupling portion 81 and communicates with the coupling groove 82 . The stepped portion 84 protrudes in a ring shape in a radially inward direction at the boundary between the coupling groove 82 and the through portion 83 . At this time, the penetrating portion 83 is formed in a cylindrical shape exceeding the diameter and thickness of the head portion of the fastening screw, and the inner diameter of the stepped portion 84 is smaller than the diameter of the head portion and the screw portion protrudes from the head portion. It can be formed to exceed the outer diameter of.

Further, it is preferable that at least one end of each of the divided metal bridges 80a, 80b, and 80c is formed with a continuous support end 87 integrally extending from the coupling portion 81 and inserted into the opening 178. The continuous support end 87 is formed by using the virtual support end set by virtually dividing one or more of the plurality of virtual extension parts based on the virtual dividing surface as design information. Therefore, even if each of the divided metal bridges 80a, 80b, and 80c is formed by being divided into a plurality of pieces, the mutually adjacent continuous support ends 87 may be substantially continuously arranged. At this time, it is preferable to understand that the continuous arrangement means that the facing end surfaces of each of the continuous support ends 87 are substantially adjacent and face each other without shifting forward or backward or up and down. Therefore, each of the continuous support ends 87 may be arranged in a form substantially similar to the extension part 88 extending integrally while being provided in a form divided in the longitudinal direction.

Each of the continuous support ends 87 may be inserted into the opening 178 formed in each of the divided prosthetic parts 170a, 170b, and 170c. Accordingly, the divided metal bridges 80a, 80b, and 80c may be continuously inserted below the divided prosthesis parts 170a, 170b, and 170c along the direction of the dental arch. Through this, the divided metal bridges 80a, 80b, and 80c maintain the divided prosthesis parts 170a, 170b, and 170c even when a mastication pressure is applied to each adjacent end side of the divided prosthesis parts 170a, 170b, and 170c. Since it is continuously supported along the arch direction, durability can be remarkably improved.

In addition, the cover extension 85 preferably protrudes downward along the rim of the coupling groove 82 . At this time, it is preferable that the cover extension part 85 protrudes with an extension length corresponding to the exposed length of the post of the abutment exposed at the spaced interval. Therefore, in a state in which the abutment is fastened to the top of the implant and the split metal bridges 80a, 80b, and 80c are fixed to the top of the abutment, the target arch and the split metal bridges 80a, 80b, 80c) The outer surface of the post of the abutment exposed through the gap may be covered.

Preferably, the divided metal bridges 80a, 80b, and 80c are made of titanium, which is a biocompatible metal having high strength and excellent corrosion resistance. In detail, the divided metal bridges 80a, 80b, and 80c are preferably manufactured by milling and anodizing a titanium material based on the virtual divided bridge.

7A and 7B are exemplary diagrams illustrating a manufacturing process of a final segmented digital prosthesis in the method for manufacturing a segmented digital prosthesis according to an embodiment of the present invention, and FIG. 8 is a segmented digital prosthesis according to an embodiment of the present invention. It is a cross-sectional view of a segmented digital prosthesis manufactured through the prosthetic manufacturing method.

Referring to FIGS. 7A to 8 , the divided metal bridges 80a, 80b, and 80c are assembled and fixed to the divided prosthesis parts 170a, 170b, and 170c to finally manufacture the divided digital prosthesis 190. this is preferable

In detail, referring to FIGS. 7A and 8 , it is preferable that the split metal bridges 80a, 80b, 80c, and 80 are fixed to the target arch 2. At this time, the fixture 9 is placed in the target arch 2 at each position corresponding to the placement information. Then, the abutment 10 is fastened to the upper side of the fixture 9. At this time, the abutment 10 may be selected from abutments actually manufactured with the post length as an optional item. Alternatively, the abutment 10 may be manufactured through the manufacturing apparatus based on the virtual abutment.

The divided metal bridges 80a, 80b, 80c, and 80 are disposed above the abutment 10, and the fastening screw 174 penetrates the coupling part 81 to the abutment 10. fastening is fixed When the divided metal bridges 80a, 80b, 80c, and 80 are fixed to the target arch 2, each of the continuous support ends 87 of the mutually adjacent divided metal bridges 80a, 80b, 80c, and 80 They may be arranged adjacently in a substantially continuous arrangement. Also, the post 10a of the abutment 10 may be entirely covered through the cover extension 85 .

Referring to FIGS. 7B and 8 , each of the assembly grooves 177 formed in the split prosthetic parts 170a, 170b, 170c, and 170 is inserted into the opening 178 so that the continuous support end 87 is inserted. Preferably, the divided metal bridges 80a, 80b, 80c, and 80 are inserted. At this time, since the divided metal bridges 80a, 80b, 80c, and 80 are fixed to the abutment 10, each of the divided prosthetic parts 170a, 170b, 170c, and 170 are each of the divided metal bridges 80a. , 80b, 80c, 80) can be assembled under pressure after being disposed on the upper part.

Here, each of the divided prosthesis parts 170a, 170b, 170c, and 170 and each of the divided metal bridges 80a, 80b, 80c, and 80 are divided and formed based on a divided region according to the insertion angle. That is, at least one coupling part 81 included in each of the divided metal bridges 80a, 80b, 80c, and 80 is formed according to a substantially similar installation angle included in the angle error range. Accordingly, each of the divided metal bridges 80a, 80b, 80c, and 80 is formed such that twist is minimized along the longitudinal direction and coupling directions substantially correspond along the longitudinal direction.

In addition, each of the assembly grooves 177 into which the divided metal bridges 80a, 80b, 80c, and 80 are inserted are also formed to substantially correspond to the outer shape of each of the divided metal bridges 80a, 80b, 80c, and 80. Assembly accuracy can be significantly improved. In addition, when the divided metal bridges 80a, 80b, 80c, and 80 are inserted into the assembly grooves 177, interference due to twisting can be minimized. Therefore, the divided metal bridges 80a, 80b, 80c, and 80 made of metal are inserted into the assembly grooves 177, and each of the divided prosthesis parts 170a, 170b, 170c, and 170 due to restoring force after assembly. As pressure is applied to it, the problem of fracture occurring can be prevented in advance.

In addition, each of the divided prosthesis parts 170a, 170b, 170c, and 170 is divided based on each artificial interdental space 173 corresponding to the virtual interdental space. Therefore, each artificial tooth portion 171 adjacent to each other may be disposed in a substantially continuous dental structure based on the artificial interdental space 173. Through this, since the split-type digital prosthesis 190 is provided in an integral shape as a whole along the dental arch in a state of being installed in the oral cavity, aesthetics can be remarkably improved.

At this time, it is preferable that the adhesive is applied between the assembly groove 177 and the divided metal bridges 80a, 80b, 80c, and 80. In addition, when the upper and lower jaws are occluded, the positions of each of the prosthetic split parts 170a, 170b, 170c, and 170 may be adjusted to precisely occlude with the opposing arch within the range of the margin, and then attached and fixed. Through this, the segmented digital prosthesis 190 may be finally manufactured.

Here, resin is injected and cured between the adjacent ends of the divided prosthetic parts 170a, 170b, 170c, and 170 so that the divided prosthetic parts 170a, 170b, 170c, and 170 are integrally formed along the direction of the dental arch. Fixed is preferred. As described above, according to the present invention, assembly accuracy and ease of assembly can be improved as the prosthetic part and the bridge part are divided according to the placement angle for each tooth position. In addition, a simple method in which the adjacent ends of the divided prosthesis parts 170a, 170b, 170c, and 170 are attached through the resin after the assembly and attachment/fixation of the divided prosthetic parts 170a, 170b, 170c, and 170 are completed. As a result, a practically integrated digital prosthesis can be provided. In this case, between the divided prosthetic parts 170a, 170b, 170c, and 170 may be shielded from the external environment through the resin. Accordingly, penetration of foreign substances such as food scraps between the divided prosthetic parts 170a, 170b, 170c, and 170 can be fundamentally prevented, and hygiene and management convenience can be remarkably improved.

In addition, a color layer 191 may be further included at the lower end of the segmented digital prosthesis 190 .

In detail, a paint composition having a predetermined viscosity may be laminated and applied to the lower end of the segmented digital prosthesis 190 to a predetermined thickness. In this case, the coating composition may include a base powder made of the same material as the prosthetic base and a powder formulation including a preset pigment to be expressed in a color corresponding to the target arch. For example, the base powder may include an oxide and one selected from ceramic powder, porcelain powder, zirconia powder, and mixtures thereof. The oxide may include one selected from silicon dioxide, aluminum oxide, zinc peroxide, sodium oxide, potassium oxide, zirconium oxide, calcium oxide, phosphoric anhydride, and mixtures thereof.

In addition, paint compositions for each color may be multi-layered and applied to the outside of the lower end of the segmented digital prosthesis 190 . Through this, the coloring layer 191 can develop a gradation of color similar to that of actual gums, and the aesthetics of the final segmented digital prosthesis formed with the coloring layer can be remarkably improved.

9 is an exemplary view showing a virtual prosthetic base and a virtual correction base in the method of manufacturing a segmented digital prosthesis according to an embodiment of the present invention.

Referring to FIG. 9 , the virtual prosthetic base m170 set based on the planning image m1 is preferably reset to an enlarged virtual correction base m170A including a preset contraction tolerance.

In detail, it is preferable that each of the tooth images m171 is reset to the three-dimensional outer shape information of the outwardly enlarged virtual corrective tooth portion m171A including the preset first shrinkage tolerance e1. Also, the virtual assembly groove m177 is preferably corrected with a virtual correction assembly groove m177A whose internal space is enlarged to exceed the volume of the virtual bridge base including the preset second shrinkage tolerance e2.

Here, the first shrinkage tolerance e1 is preferably set to a value at which the volume of the virtual correction base m170A can be expanded at a volume ratio of 10 to 20% with respect to the volume of the virtual prosthetic base m170. That is, the volume of the virtual prosthetic base m170A may be set to be enlarged at a volume ratio of 10 to 20% with respect to the volume of the virtual prosthetic base m170. Further, the second shrinkage tolerance e2 is preferably set to a value that allows the volume of the virtual correction assembly groove m177A to be expanded by 10 to 10% in volume ratio with respect to the volume of the virtual assembly groove m177. . That is, the volume of the virtual calibration assembly groove m177A may be set to be enlarged at a volume ratio of 10 to 20% with respect to the volume of the virtual assembly groove m177.

The virtual correction base m170A and the virtual correction assembly groove m177A allow the three-dimensional image of the virtual prosthetic base m170 and the virtual assembly groove m177 to contract in the transverse direction, longitudinal direction, and overall outward direction. Virtually enlarged and set including tolerances (e1, e2). Therefore, compared to the virtual prosthesis base m170, the virtual correction base m170A has an overall volume while the shape of each tooth image m171 and the virtual correction tooth portion m171A and the curvature in the direction of the dental arch correspond to each other. This magnification can be corrected.

Here, the curvature of the arch direction and the position of the placement information may also be reset to a position considering the volume ratio of the virtual prosthetic base m170 enlarged and corrected by the virtual correction base m170A. That is, if the placement information is set to the lateral incisor, first premolar, and molar of the virtual prosthetic base m170, the placement information may also be set to the lateral incisor, first premolar, and molar in the virtual correction base m170A.

As such, the contraction error generated during the CNC machining and firing of the zirconia block may be already taken into consideration during the design process of the segmented digital prosthesis and manufactured. Through this, even if shrinkage occurs in the firing process of the divided prosthetic part, the size/volume of the finally formed divided prosthetic part can be formed to substantially correspond to the size/volume of the virtual divided prosthetic part.

Furthermore, it is preferable that the second shrinkage tolerance e2 applied to the virtual correction assembly groove m177A is set by further including a clearance for the clearance between the virtual bridge base and the virtual assembly groove m177. Accordingly, the assembly grooves formed in each of the divided prosthesis parts may be formed to be larger than each of the divided metal bridges. Through this, the divided metal bridge can be easily assembled without interfering with the assembly groove.

In addition, the position of the divided prosthetic part assembled to the upper side of the divided metal bridge can be precisely adjusted through occlusion of the upper and lower jaws. In detail, when the split prosthetic part is placed on the target arch so that the split metal bridge is inserted into the assembly groove and then occluded with the opposing arch, the split prosthetic part can be moved to an accurate occlusion position within the marginal distance range. Also, the moved divided prosthetic part can be attached and fixed without unnecessary movement later as the adhesive hardens.

10 is an exemplary diagram illustrating a segmented digital prosthesis according to another embodiment of the present invention. In this embodiment, the basic configuration except for the assembling protrusion 86b and the mold groove 177c is the same as that of the above-described embodiment, so a detailed description of the same configuration will be omitted.

Referring to FIG. 10 , a plurality of assembly protrusions 86b may protrude on at least one side of the inner and outer surfaces facing the upper surface of the extension part 88 and the assembly groove 177 in correspondence with the insertion angle. In addition, a molded groove 177c into which the assembling protrusion 86b is molded may be recessed on the other side of the inner and outer surfaces facing the upper surface of the extension part 88 and the assembling groove 177 .

In detail, the assembling protrusions 86b are preferably formed in plural spaced apart along the upper surface of each of the divided metal bridges 80, and may have a circular, elliptical or polygonal cross-sectional shape in the transverse direction. At this time, the assembling protrusion 86b may protrude into a pillar shape having substantially the same cross-sectional shape as the upper end and the lower end.

Here, the design information of the assembling protrusion 86b and the mold groove 177c may be set based on the planning image.

In detail, a plurality of virtual assembly protrusions may be set to protrude on at least one side of the upper surface of the virtual extension part and the facing inner and outer surfaces of the virtual assembly groove in correspondence with the insertion angle. In addition, a virtual molded groove recessed corresponding to the volume of the virtual assembly protrusion may be set on the other side of the upper surface of the virtual extension part and the inner and outer surfaces facing each other of the virtual assembly groove. Here, at least one of the plurality of virtual assembling protrusions may have a virtual direction alignment surface aligned with an implant placement direction set on an outer surface.

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.

m1: Planning image m7: Virtual division plane
m80: virtual bridge base m80a,m80b,m80c: virtual split bridge
m81: virtual coupling part m87: virtual support
m88: virtual extension part m170: virtual prosthesis base
m170a,m170b,m170c: Virtual segmented prosthesis m177: Virtual assembly home
m178: Opening 80a, 80b, 80c: Split metal bridge
81: coupling part 87: continuous support
88: extension part 170a, 170b, 170c: divided prosthetic part
177: assembly groove 178: opening
190: segmented digital prosthesis

Claims (10)

A planning image including 3D surface information of the target arch acquired through the imaging device is generated through the planning unit, and a virtual prosthetic base in which a plurality of tooth images are continuously arranged in a preset dental structure is set based on the planning image. The first step to become;
A virtual bridge base set so that the virtual coupling parts, which are virtually aligned at positions corresponding to the placement information of a plurality of preset implants along the direction of the dental arch, are continuously connected through virtual extensions, are extracted from the digital library, loaded into the planning unit, and then loaded into the virtual prosthesis. A second step that is virtually arranged so as to continuously overlap along the bottom center and both ends of the base;
A virtual assembly groove is set at a portion where the virtual bridge base overlaps in the virtual prosthetic base, and a virtual dividing surface is set at a dividing point at which the virtual prosthetic base and the virtual bridge base are spaced apart in plurality along the direction of the dental arch. a third step of generating a plurality of virtual split prosthetic parts and virtual split bridges by simultaneously virtual splitting on a reference basis; and
A plurality of the virtual split prosthetic parts and virtual split bridges are transmitted to a manufacturing device to manufacture real split prosthetic parts and split metal bridges, respectively, and each of the split metal bridges is assembled and fixed to the split prosthetic parts to split digital prostheses. A manufacturing method of a segmented digital prosthesis including a fourth step of final manufacturing of the prosthesis. According to claim 1,
In the third step, the virtual division surface is set to cross at least one virtual interdental space selected from a plurality of virtual interdental spaces between the tooth images. According to claim 1,
In the second step, the implantation information is set to penetrate the longitudinal center of a pre-selected tooth image among the plurality of tooth images to correspond to a predetermined implantation angle for each tooth position of the target arch,
In the third step, the virtual division surface is
A step of grouping and setting at least one or more implantation information, the implantation angle of which is included within a predetermined angular error range among mutually adjacent implantation information, into divided areas;
The method of manufacturing a segmented digital prosthesis, characterized in that the method comprises a step of virtually arranging a virtual plane intersecting the virtual extension between each of the divided regions. According to claim 3,
The second step is
Virtually adjusting the center of each of the virtual couplers to correspond to each of the placement information;
Virtually extending the bar-shaped virtual extensions to integrally connect the virtual couplers adjacent to each other,
In the third step, the virtual division surface is virtually arranged across the virtual extension part. According to claim 4,
The third step is
dividing the virtual assembly groove on the basis of the virtual dividing surface and setting adjacent ends of the virtual assembly grooves adjacent to each other as virtual openings communicating in the direction of the dental arch;
Manufacturing a split-type digital prosthesis, characterized in that it comprises the step of dividing the virtual extension part based on the virtual division surface and setting the virtual support end extending from the virtual coupling part so as to correspond to the inner shape of each virtual opening. method. According to claim 5,
In the fourth step,
fixing each of the divided metal bridges to an upper end of the implant placed in the target arch through fastening screws;
inserting each of the divided metal bridges into assembly grooves formed in each of the divided prosthesis parts and fixing the divided metal bridges through adhesives so that continuous support ends corresponding to the virtual support ends are inserted into openings formed corresponding to the virtual openings;
and injecting and curing a resin between adjacent ends of each of the divided prosthesis parts to integrally fix each of the divided prosthetic parts along the direction of the dental arch. According to claim 1,
The second step is
Virtually arranging the virtual bridge base based on an alignment line set horizontally outside the three-dimensional surface information of the target arch in a vertical direction;
extracting a virtual abutment from the digital library and loading it into the planning unit;
virtual alignment of the virtual abutment corresponding to the alignment line;
The extension length of the virtual cover extension protruding downward along the edge of the virtual coupling groove set in the virtual coupling portion is set so that the outer surface of the virtual abutment exposed between the virtual bridge base and the three-dimensional surface information of the target arch is covered A method for manufacturing a segmented digital prosthesis comprising the step of being. Based on the planning image including the 3D surface information of the target arch, a plurality of tooth images are set in correspondence with the virtual prosthetic base in which a plurality of tooth images are continuously arranged in a preset dental structure, and a plurality of preset implants are set along the direction of the dental arch. An assembly groove corresponding to the outer shape of the virtual bridge base is formed on the inner surface of the lower part so that the virtual connecting part corresponding to the placement information is continuously and integrally connected through the virtual extension part, and at least one of the virtual interdental spaces between the tooth images is formed. Split prosthetic units divided on the basis of the virtual division surface set between the plurality of selected virtual teeth as described above and provided in plurality; and
It is made of a metal material including a plurality of coupling parts coupled to the implant based on the virtual bridge base and a plurality of extension parts integrally connecting the coupling parts, and at least one of the plurality of extension parts is the virtual dividing surface Split-type digital prosthesis including split metal bridges divided on the basis of a plurality of split metal bridges. According to claim 8,
An opening opening from the assembly groove toward the dental arch is formed at an adjacent end side of each of the divided prosthesis parts so that the assembly groove formed in each of the divided prosthetic parts continuously communicates in the direction of the dental arch;
The split type digital prosthesis, characterized in that, at least one end of each of the split metal bridges is formed with a continuous support end integrally extending from the coupling part and inserted into the opening. According to claim 8,
The coupling portion includes a coupling groove corresponding to the shape of the upper end of the implant, a through portion into which a fastening screw is inserted, and a stepped portion projecting radially inward at a boundary between the coupling groove and the through portion,
It is fastened to the top of the implant and protrudes downward along the rim of the coupling groove so that the outer surface of the post of the abutment exposed between the split metal bridge and the target arch is covered, but formed with an extension length corresponding to the exposed length of the post. A segmented digital prosthesis further comprising a cover extension.

Images