WO2020197133A1 - Pilier prothétique numérique et procédé de fabrication de matériau de restauration dentaire l'utilisant - Google Patents

Pilier prothétique numérique et procédé de fabrication de matériau de restauration dentaire l'utilisant Download PDF

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Publication number
WO2020197133A1
WO2020197133A1 PCT/KR2020/003415 KR2020003415W WO2020197133A1 WO 2020197133 A1 WO2020197133 A1 WO 2020197133A1 KR 2020003415 W KR2020003415 W KR 2020003415W WO 2020197133 A1 WO2020197133 A1 WO 2020197133A1
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WO
WIPO (PCT)
Prior art keywords
abutment
digital
unique identification
virtual
identification mark
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PCT/KR2020/003415
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English (en)
Korean (ko)
Inventor
김진철
김진백
Original Assignee
주식회사 디오
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Publication of WO2020197133A1 publication Critical patent/WO2020197133A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0004—Computer-assisted sizing or machining of dental prostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0001—Impression means for implants, e.g. impression coping
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/006—Connecting devices for joining an upper structure with an implant member, e.g. spacers with polygonal positional means, e.g. hexagonal or octagonal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam

Definitions

  • the present invention relates to a digital abutment and a method of manufacturing a dental restoration using the same, and more particularly, to a digital abutment that improves procedure convenience and scan recognition rate, and a method of manufacturing a dental restoration using the same.
  • dental restorations including dentures and prostheses refer to artificial periodontal tissue in the oral cavity that artificially restores appearance and function by replacing a missing tooth.
  • the dental restoration is installed inside the oral cavity to restore mastication function and prevent the periodontal tissue from being deformed, and may be divided into partial/complete dentures and partial/complete prostheses according to the number of missing teeth.
  • the denture is installed by being adhered to the surface of the gum by applying a dental adhesive to the inner joint groove, and the prosthesis may be installed through a fixture placed in the alveolar bone.
  • the dentures since the dentures are supported on the outer surface of the gums, they cause deformation of the gums or a large amount of foreign body sensation.
  • a plurality of fixtures capable of supporting the prosthesis are placed on the gum at predetermined intervals along the dental arch, and an abutment is coupled to the upper end.
  • the prosthesis has a fastening portion fixed to the upper end of the abutment at a position corresponding to each upper end of the abutment.
  • the conventional abutment has a coupling protrusion coupled to the upper end of the fixture, a margin portion provided on the upper side of the coupling protrusion and provided inside the soft tissue of the gum, and a margin portion provided on the upper side of the margin portion and coupled to the fastening portion It includes a coupling portion.
  • the fastening part may be provided as a support cylinder that is arranged vertically in correspondence with each position of the abutment, or may be formed as a fastening groove recessed in a vertical direction corresponding to an upper end profile of the abutment. That is, as the coupling part of the abutment is substantially inserted into the fastening part and fixed by a fixing means, the prosthesis may be installed inside the oral cavity.
  • FIG. 1 is an exemplary view showing a conventional abutment.
  • a conventional abutment is provided in various sizes and shapes corresponding to the size and shape of a person's gums and fixtures, and a unique model number is assigned to each type of abutment.
  • the model number was displayed on the side surface of each abutment by a method such as laser engraving.
  • the conventional abutment is set to various diameters corresponding to the diameter of the fixture, and the height of the coupling portion, that is, a post, is set to various heights corresponding to the height of the prosthesis.
  • the height of the margin portion that is, a cuff, was set to various heights corresponding to the height of the gum of the person to be treated.
  • the conventional abutment has a problem in that it is difficult to identify the type of the abutment with the naked eye because the portion indicated for the model number is buried by the soft tissue of the oral cavity when it is installed inside the oral cavity of the person to be treated.
  • the margin of the conventional abutment when the margin of the conventional abutment is inserted into the soft tissue of the gum, the margin is not exposed to the outside of the gum, so the cuff cannot be visually identified, making it difficult to confirm the type of the abutment. .
  • the present invention has as a solution to provide a digital abutment with improved procedure convenience and scan recognition rate, and a method of manufacturing a dental restoration using the same.
  • the present invention provides a first step of scanning a target arch in which a digital abutment is placed on which a unique identification mark is formed for recognition of a scan image processing through an oral scanner;
  • the digital abutment scanned through the oral scanner and the surface information of the target arch are converted into 3D digital data through scan image processing and obtained, and surface information on the digital abutment converted into 3D digital data is obtained.
  • the virtual abutment extracted from the digital library is virtually arranged and replaced in the 3D work image, and a virtual mating groove corresponding to the outer profile of the virtual abutment is set.
  • a third step of generating design information of an artificial crown And it provides a method for manufacturing a dental restoration using a digital abutment including a fourth step in which an artificial crown is finally manufactured in response to the design information.
  • the present invention relates to a digital abutment used for generating design information of an artificial crown corresponding to a virtual abutment extracted from a digital library that is converted into 3D digital data through scan image processing and is virtually placed in a 3D working image.
  • the present invention provides the following effects.
  • the size and shape of a digital abutment in the process of extracting a virtual abutment that corresponds accurately from a digital library using a three-dimensional working image of a state in which a plurality of types of digital abutments provided as fine sizes are placed in the oral cavity. Since it is possible to design an accurate artificial crown that matches the virtual abutment through visual recognition of the unique identification mark corresponding to, confusion between the operator can be prevented.
  • a unique identification mark is formed in the form of a groove in the upper part of the joint in response to the size and shape of the digital abutment, making it easy to identify with the naked eye.
  • the artificial crown due to incorrect placement can be prevented and the convenience of the procedure can be remarkably improved.
  • a unique identification mark is formed in the form of a groove on the upper part of the coupling part, so that when molding with the inner profile of the mating groove of the artificial crown corresponding to the outer surface profile of the coupling part, the contact area filled with the curable resin is maximized, so that the adhesion is increased.
  • the bonding strength with the digital abutment may be improved.
  • 1 is an exemplary view showing a conventional abutment.
  • FIG. 2 is a flow chart showing a method of manufacturing a dental restoration using a digital abutment according to an embodiment of the present invention.
  • 3A and 3B are perspective views showing a digital abutment according to an embodiment of the present invention.
  • FIGS. 4A and 4B are perspective views showing a digital abutment according to a first modified example of an embodiment of the present invention.
  • 5A and 5B are perspective views showing a digital abutment according to a second modified example of an embodiment of the present invention.
  • FIG. 6 is an exemplary view showing a three-dimensional working image in a method for manufacturing a dental restoration using a digital abutment according to an embodiment of the present invention.
  • FIGS. 3A and 3B are perspective views illustrating a digital abutment according to an embodiment of the present invention.
  • 4A and 4B are perspective views showing a digital abutment according to a first modified example of an embodiment of the present invention
  • FIGS. 5A and 5B are a digital abutment according to a second modified example of an embodiment of the present invention. It is a perspective view showing the ment.
  • Figure 6 is an exemplary view showing a three-dimensional work image in the method for manufacturing a dental restoration using a digital abutment according to an embodiment of the present invention.
  • a method for manufacturing a dental restoration using a digital abutment includes scanning the target arch in which the digital abutment is placed (s10), and generating a three-dimensional work image (s20). ), generating design information of the artificial crown (s30), and a series of steps of final manufacturing of the artificial crown (s40).
  • the method of manufacturing a dental restoration using such a digital abutment is preferably performed through a dental restoration manufacturing system including a planning unit.
  • each image data such as a plurality of scanning images and CT images is acquired using an imaging device such as an oral scanner or a computed tomography machine, and transmitted to the planning unit.
  • a 3D work image which is final image data, is generated through an image processing process such as alignment, overlapping, swapping, correction, or matching of the plurality of scanning images and the CT images through the planning unit.
  • a virtual artificial crown which is design information of the artificial crown, is generated through the planning unit so as to precisely match the oral cavity of the operator based on the generated three-dimensional work image.
  • the planning unit includes a storage unit storing each image data, a processing unit processing the integrated scanning image and the three-dimensional work image, and the virtual artificial crown based on each image data.
  • an input unit for inputting information and a control command to the processing unit an input unit for outputting the input information and control commands, and generated data such as each image data, the three-dimensional work image, and the virtual artificial crown are included. .
  • the planning unit may further include a communication unit capable of receiving each image data or transmitting each image data or generated data to an external device. That is, each image data acquired using the imaging device is transmitted to the planning unit through the communication unit, and each image data or generated data is transmitted to the external device through the communication unit.
  • the external device is preferably understood as a manufacturing device capable of manufacturing a real artificial crown corresponding to the virtual artificial crown, such as a 3D printer or a milling machine.
  • the target arch in which the digital abutment 100, 200, and 300 having unique identification marks 14a, 14b, and 14c for scanning image processing recognition is placed on the upper part is scanned through an oral scanner (s10).
  • the target arch means a dental jaw in which the dental restoration is substantially installed, and the arch arch means a tooth that is occluded with the target arch.
  • the target arch is the mandible and the grand arch is the upper jaw, as an example and described.
  • a fixture is placed in the alveolar bone of the target arch.
  • the digital abutment (100, 200, 300) is preferably provided to mediate the connection between the fixture and the artificial crown.
  • the fixture is installed substantially perpendicular to the alveolar bone on the anterior tooth side, but in order to prevent damage due to contact or pressure with the inferior alveolar nerve in particular on the posterior side of the mandible, the fixture will be installed obliquely at a preset angle. I can.
  • an inner circumferential groove is formed in the upper end of the fixture so that the fastening protrusion 11 of the digital abutment (100, 200, 300) is inserted and fastened, and a hexa groove is formed in the inner circumference of the inner circumferential groove along the circumferential direction. desirable.
  • the digital abutment (100, 200, 300) includes a fastening protrusion (11), a margin portion (12), a coupling portion (13), and unique identification marks (14a, 14b, 14c). .
  • the digital abutment (100, 200, 300) is converted into 3D digital data through scan image processing, is virtually placed on the 3D work image (1d), and is extracted from the digital library, corresponding to the virtual abutment (100k). It is preferable to understand it as a device used to generate the design information 400d.
  • the fastening protrusion 11 may be formed as an outer profile whose radius expands from a lower side to an upper side, and may be provided in a shape having a hollow inner profile penetrating in the vertical direction.
  • the outer circumferential surface of the fastening protrusion 11 has a hexa protrusion 11a formed along the circumferential direction corresponding to the hexa groove so as to fit into the hexa groove formed on the inner circumferential surface of the upper end of the fixture installed in the alveolar bone.
  • the hexa protrusion 11a may be formed on an outer surface of the lower end side of the fastening protrusion 11 as a plurality of flat surfaces that are bent at predetermined intervals along the circumferential direction.
  • a case in which the entire shape of the flat surface of the hexa protrusion 11a formed along the circumferential direction is formed as a six surface is illustrated as an example, but is not limited thereto.
  • the coupling direction of the digital abutment (100, 200, 300) can be easily determined by a simple method in which the hexa protrusion (11a) is joined to the hexa groove of the fixture, and the digital abutment (100, 200, 300) is constrained. Rotation can be prevented in advance.
  • a through hole is formed through the inside of the fastening protrusion 11 so that a fastening screw that mediates fastening with the fixture is inserted.
  • a through hole and a communication hole 13e to be described later are formed through the inside of the digital abutment 100,200,300 in the vertical direction, and the through hole and the communication hole 13e are preferably communicated with each other.
  • the through hole is formed inside the fastening protrusion 11, and the communication hole 13e is formed inside the coupling part 13.
  • a stepped portion protruding integrally extending radially inward from an inner periphery of the digital abutment 100, 200, 300 between the through hole and the communication hole 13e is formed.
  • the fastening screw has a head portion extending radially outwardly along the circumferential direction at one end, and a screw thread is formed at the outer circumference of the other end side to be screwed into the inner peripheral groove of the upper end of the fixture.
  • the head portion of the fastening screw may be locked and restrained by a stepped portion extending from an inner periphery between the through hole and the communication hole 13e in a radial direction.
  • the stepped portion is formed as the inner diameter of the through hole is smaller than the inner diameter of the communication hole 13.
  • the fastening screw may extend to a length capable of connecting the stepped portion and the inner peripheral groove of the upper end of the fixture.
  • the digital abutment (100, 200, 300) and the fixture are mutually stably as the head of the fastening screw is engaged with the stepped portion and the other end of the fastening screw is fastened to the inner circumferential groove of the upper end of the fixture. Can be restrained.
  • the margin portion 12 is integrally provided on the upper side of the fastening protrusion 11, it is preferable that the fixture is formed in an outer profile corresponding to the shape of the periphery of the gum where the fixture is placed, and is disposed inside the soft tissue of the gum .
  • the margin portion 12 is preferably provided with an outer profile substantially continuous with the surface of the gum on the upper portion of the fastening protrusion 11 to prevent the inflow of foreign substances into the gum.
  • the margin part 12 may be formed in a shape in which the diameter increases from the lower side to the upper side so as to be disposed inside the soft tissue of the gum.
  • the upper surface portion 12a of the margin portion 12 is formed integrally with the outer surface of the coupling portion 13 and is provided to protrude radially outward from the outer surface of the coupling portion 13, and the It is possible to support the lower end of the artificial crown coupled to the coupling portion (13).
  • the lower portion of the digital abutment (100, 200, 300) based on the upper surface portion (12a) of the margin portion (12) is disposed inside the gum to be fastened to the fixture, and the upper portion is exposed to the outside of the gum. It is desirable to understand.
  • the length of the margin part 12 in the vertical direction that is, a cuff may be differently set and provided for each of the digital abutments 100, 200, and 300.
  • the digital abutment 100, 200, and 300 provided with a cuff corresponding to the height of the gum of the person to be treated may be selected and installed by the operator.
  • the coupling part 13 is provided integrally on the upper side of the margin part 12, and substantially corresponds to the inner profile of the mating groove so that it fits into the mating groove formed in the lower part of the artificial crown installed in the oral cavity of the person to be treated. It is preferable to be provided with an outer profile.
  • the side portion 13a of the coupling portion 13 may be formed with an alignment groove 13b that extends in the circumferential direction or in the front-rear direction along the outer surface.
  • the alignment groove 13b may be provided as a hexa surface portion having a hexagonal cross section so as to correspond to the hexa protrusion 11a and the hexa groove.
  • At least one de-cut portion 13c may be formed on the side portion 13a of the coupling portion 13.
  • the alignment groove (13b) and the de-cut (13c) is preferably formed to provide a visible reference indicator for the direction of placement when the digital abutment (100, 200, 300) is coupled to the fixture. Accordingly, even if the fastening protrusion 11 is inserted inside the upper end of the fixture and is covered, the operator visually checks the alignment groove 13b and the de-cut part 13c, and the digital abutment (100, 200, 300) The fastening direction of the can be easily determined. Accordingly, the installation convenience of the digital abutment 100, 200, and 300 can be significantly improved.
  • the coupling portion 13 is integrally provided on the upper portion of the margin portion 12 and is inserted into the fitting groove of the artificial crown.
  • the surface of the coupling portion 13 may be roughened.
  • the surface of the coupling part 13 is roughened to increase the scan recognition rate during oral scanning, and at the same time, the bonding force through the adhesive material filled between the mating groove of the artificial crown and the outer surface of the coupling part 13 is further enhanced. It can be improved.
  • the communication hole 13e communicating with the through hole is formed in the coupling part 13. That is, it is preferable to understand that the communication hole 13e is integrally communicated with the through hole, and the stepped portion is formed between the through hole and the communication hole 13e.
  • the unique identification marks 14a, 14b, and 14c are on the upper part of the coupling part 13 for individual matching with the virtual abutment 100k stored in the digital library. It is preferable that it is displayed to be visually recognized and provided as a visible reference indicator.
  • individual matching means that the surface information for the plurality of types of digital abutments 100, 200, 300, which are scanned through an oral scanner and converted into 3D digital data, are individually matched by the unique identification marks 14a, 14b, and 14c. It means that the virtual abutment 100k corresponding thereto is replaced.
  • the unique identification mark (14a, 14b, 14c) is selectively at least on the upper portion of the coupling part 13 for individual identification of the digital abutment (100, 200, 300) given by size and shape, that is, by a plurality of types. It is preferable to be provided with one or more grooves formed.
  • the unique identification mark (14a, 14b, 14c) is given according to the size and shape of the digital abutment (100, 200, 300), but formed and arranged on the lower recognition surface above the coupling part 13 to provide a visible reference indicator. This is desirable.
  • the recognition lowering surface means a smooth surface portion of the coupling portion 13. That is, there is a concern that the external profile of the coupling part 13 may not be continuously recognized by the oral scanner due to reasons such as a smooth surface structure or performance of the oral scanner during scanning of the coupling part 13. In order to solve this problem, it is preferable that the unique identification marks 14a, 14b, 14c are formed on the recognition deterioration surface of the coupling portion 13.
  • the unique identification mark (14a, 14b, 14c) is preferably provided with at least one groove selectively formed on the recognition deterioration surface.
  • the unique identification marks 14a, 14b, and 14c according to the present invention are formed in an intaglio shape will be illustrated and described as an example.
  • the unique identification mark may be formed in the form of a protrusion extending from the recognition deterioration surface, and the shape is not limited thereto as long as the unique identification mark is displayed so that it is visually recognized.
  • the inner profile of the fitting groove of the artificial crown is formed to substantially correspond to the outer profile of the coupling portion 13 including the groove.
  • At least one or more selectively is formed also encompasses a shape in which the unique identification mark is not formed in order to provide a function of distinguishing between each of the unique identification marks assigned to the size and shape of each digital abutment.
  • the unique identification marks 14a, 14b, and 14c are formed differently in the shape of a groove corresponding to the size and shape of the digital abutment (100, 200, 300).
  • the grooves are preferably spaced apart from each other at a predetermined interval.
  • the unique identification mark (14a, 14b, 14c) preferably includes a first unique identification mark (14a), a second unique identification mark (14b), and a third unique identification mark (14c).
  • the digital abutment (100, 200, 300) is preferably formed with the unique identification mark (14a, 14b, 14c) corresponding to the size and shape.
  • the digital abutment (100, 200, 300) preferably includes the first to ninth digital abutment (100a, 100b, 100c, 200a, 200b, 200c, 300a, 300b, 300c).
  • the basic configuration except for the unique identification marks 14a, 14b, and 14c in one embodiment of the present invention and its first and second modifications are the same, and the same configurations are indicated by the same reference numbers.
  • the first unique identification mark 14a is selectively formed at least one or more corresponding to the size and shape of the digital abutment 100, but formed in different numbers. desirable. For example, when one first unique identification mark 14a is formed on the first digital abutment 100a, a second digital abutment provided in a size and shape different from that of the first digital abutment 100a Two first unique identification marks 14a may be formed on the ment 100b.
  • the first unique identification mark (14a) surrounds the communication hole (13e) and is recessed in a semicircle shape in the upper surface (13d) of the coupling part (13). Do.
  • the second unique identification mark (14b) is selectively formed at least one or more corresponding to the size and shape of the digital abutment 200, it is formed in a different number. desirable.
  • the second unique identification mark 14b according to the first modification of the embodiment of the present invention is formed in a circular cross section in the upper surface 13d of the coupling part 13.
  • the second unique identification mark (14b) may be formed along the outer periphery of the upper surface portion (13d) of the coupling portion (13), or in some cases, on the upper surface portion (13d) of the coupling portion (13). They may be arranged in series with each other.
  • the third unique identification mark (14c) is selectively formed at least one or more corresponding to the size and shape of the digital abutment 300, it is formed in a different number. desirable.
  • the third unique identification mark 14c according to the second modification of the embodiment of the present invention is recessed in an intaglio shape along the circumference of the side portion 13a of the coupling portion 13.
  • the third unique identification mark 14c may be recessed along the outer surface of the upper side of the side portion 13a of the coupling portion 13 including the alignment groove 13b and the decut portion 13c. . Therefore, even after the margin portion 12 is inserted into the soft tissue of the gum, a unique identification mark (14a, 14b, 14c) that can be easily visually identified on the upper portion of the coupling portion 13 is shown in the digital abutment (100, 200, 300). It is formed in the shape of a groove corresponding to the size and shape. Through this, incorrect placement of the artificial crown caused by the operator's error can be prevented, and the convenience of the procedure can be significantly improved.
  • the unique identification marks 14a, 14b, 14c are formed in the shape of a groove on the upper part of the coupling part 13. Accordingly, the contact area to be filled with the curable resin is maximized when it is molded with the inner profile of the fitting groove of the artificial crown corresponding to the outer profile of the coupling part 13. Through this, since the adhesive force between the coupling portion 13 and the fitting groove is increased, when an artificial crown is installed in the oral cavity, the coupling force with the digital abutment 100, 200, 300 may be improved.
  • the target arch in which the digital abutment (100, 200, 300) is placed is scanned through the oral scanner.
  • the digital abutment (100, 200, 300) scanned through the oral scanner and the surface information of the target arch are converted into 3D digital data through scan image processing by the planning unit and obtained (s20).
  • a three-dimensional work image 1d including surface information on the digital abutment 100, 200, and 300 converted into three-dimensional digital data by the planning unit is generated (s20).
  • the three-dimensional working image (1d) is preferably understood as three-dimensional digital data including the surface information (2d) of the target arch and the placement information (7d) of the fixture.
  • the surface information (2d) of the target arch has the same size and shape substantially corresponding to the actual target arch of the person to be treated.
  • the mounting information 7d of the fixture has the same size and shape corresponding substantially to the actual fixture.
  • the surface information is converted into 3D digital data as at least three bent portions of the surfaces of the coupling portions 13 are recognized by the oral scanner and then scanned by the planning unit.
  • the bent portion of the surface of the coupling portion 13 is the unique identification mark (14a, 14b, 14c), the alignment groove (13b) and the de-cut portion (13c), and the upper surface of the margin portion (12) It is desirable to understand that it includes (12a).
  • the surface of the coupling portion 13 by the unique identification mark (14a, 14b, 14c), the alignment groove portion (13b) and the decut portion (13c), and the upper surface portion (12a) of the margin portion (12) As corners and vertices that can be easily scanned are formed, the recognition deterioration surface is minimized.
  • the target arch in which the fixture and the digital abutment (100, 200, 300) are placed is scanned through the oral scanner. That is, it is preferable that the oral scanner scans the entire target arch of the person to be treated and the coupling part 13 exposed to the surface of the gum.
  • the unique identification mark (14a, 14b, 14c), the alignment groove (13b), the de-cut part (13c), and the upper surface (12a) of the margin part (12) is the 3D digital data identification criteria It can be obtained as negative (k1, k2, k3).
  • the identification reference portions k1, k2, and k3 are included in the surface information of the coupling portion 13 of the digital abutment 100, 200, and 300.
  • the identification reference units k1, k2, and k3 are scanned through the oral scanner and converted into virtual 3D digital data as scanned image processing is performed by the processing unit of the planning unit.
  • the identification reference unit (k1, k2, k3) includes a first identification reference unit (k1), a second identification reference unit (k2), and a third identification reference unit (k3).
  • the first identification reference unit k1 means virtual 3D digital data corresponding to the unique identification marks 14a, 14b, and 14c of the real object.
  • the second identification reference unit k2 means virtual 3D digital data corresponding to the alignment groove 13b of the real object.
  • the third identification reference part k3 means virtual 3D digital data corresponding to the edge of the upper surface part 12a of the margin part 12 of the real object.
  • the identification reference unit may include virtual 3D digital data corresponding to the edge of the decut unit 13c of the real object.
  • the unique identification mark (14a, 14b, 14c) for scanning image processing recognition is formed on the upper part of the coupling part 13, and the unique identification mark (14a, 14b, 14c) is formed when scanning through the oral scanner. Can be recognized. Moreover, the alignment groove (13b) and the de-cut (13c) formed in the side portion (13a) of the coupling portion (13) when scanning through the oral scanner, and the edge of the upper surface portion (12a) of the margin portion (12) Can be recognized.
  • the surface structure formed by the groove of the unique identification mark (14a, 14b, 14c), the alignment groove (13b) and the decut part (13c) when scanning the coupling part 13 through the oral scanner is enhanced by the grooves or corners of.
  • the scan recognition rate is enhanced by the unique identification marks 14a, 14b, and 14c in the form of grooves formed on the recognition-degrading surface of the coupling portion 13 scanned through the oral scanner.
  • minute errors between the real digital abutments 100.200 and 300 and the correspondingly converted 3D digital data are substantially removed, and thus the accurate 3D work image 1d can be obtained.
  • the virtual abutment 100k automatically extracted from the digital library in response to the unique identification marks 14a, 14b, 14c of the digital abutment 100, 200, 300 is transferred to the three-dimensional work image 1d by the planning unit.
  • design information 300d of the artificial crown in which the virtual fitting groove 301d corresponding to the outer profile of the virtual abutment 100k is set is generated by the planning unit (s30).
  • the virtual abutment 100k has substantially the same size and shape as the digital abutment 100, 200, and 300.
  • the virtual abutment 100k refers to 3D vector data capable of identically reproducing the appearance and structure of the real digital abutment 100, 200, and 300. It is preferable that a plurality of such virtual abutments 100k are previously stored in the digital library by matching and matching shapes to real digital abutments 100, 200, and 300 provided in various standards and types.
  • the virtual abutment 100k may be obtained through direct scanning of the real digital abutment 100, 200, or 300 or through CAD/CAM design information. In this case, it is preferable to understand the digital library as a database of three-dimensional appearance information obtained for the real digital abutments 100, 200, and 300 provided in various standards and types.
  • the virtual abutment 100k may be automatically extracted from the digital library through the planning unit corresponding to the size and shape of the real digital abutment 100, 200, and 300.
  • the virtual abutment 100k may be manually extracted by the planning unit.
  • the virtual abutment (100k) of the type matching the number and shape of the unique identification marks (14a, 14b, 14c) formed on the coupling part 13 through the oral scanner is digital library through the planning part. It is preferably automatically extracted from.
  • the virtual abutment (100k) is applied to the surface information of the three-dimensional work image (1d) including the surface information (2d) of the target arch and the placement information (7d) of the fixture by the planning unit. It is preferred to be virtually arranged. That is, the 3D digital data of the combining unit 13 converted by scanning image processing by the planning unit is replaced with the virtual abutment 100k extracted from a digital library.
  • the three-dimensional digital data converted from the coupling portion 13 is recognized by the oral scanner at least three curved portions of the surface of the coupling portion 13 including the unique identification mark (14a, 14b, 14c) Then, the scanning image is processed by the planning unit.
  • the scan recognition rate will be enhanced. I can. Accordingly, the automatically extracted virtual abutment 100k corresponding to the unique identification marks 14a, 14b, 14c is virtually placed and replaced in the 3D working image 1d. Accordingly, it is possible to generate the precise design information 300d of the artificial crown corresponding to the outer profile of the virtual abutment 100k, and thus the precision of the final manufactured dental restoration can be significantly improved.
  • the surface information of the target arch (2d) corresponding to the outer surface profile of the target arch side and the surface information of the arch arch corresponding to the outer surface profile of the arch side facing the target arch Is imaged and displayed in three dimensions.
  • the three-dimensional working image 1d includes information on the occlusal vertical dimention between the target arch and the arch arch.
  • the vertical height may be obtained by a coupling bite (not shown) that is separately provided and inserted into the oral cavity.
  • the coupling bite (not shown) preferably includes one surface portion corresponding to the outer surface of the gum portion of the target arch and the other surface portion occluding the end of the arch arch.
  • the coupling bite (not shown) is preferably provided with a thickness corresponding to the vertical height of each person to be treated with an interval between the corrected one surface portion and the corrected other surface portion.
  • the vertical height for each person to be treated is an interval between the upper and lower jaws that can be occluded in a comfortable and comfortable state for the person to be occupied. Accordingly, in a state in which the target arch and the grand arch are occluded by the joining bite (not shown), each image data considering the vertical height can be obtained.
  • the corresponding to the vertical height of each subject means that the distance between one side and the other side of the combination bite is pre-manufactured to correspond to the vertical height of each subject, and the combination bite between the target arch and the grand arch ( (Not shown) is installed, but it is preferable to understand that it encompasses the correction to correspond to the vertical height of each person to be treated by the occlusal pressure.
  • each image data such as a plurality of scanning images and CT images is acquired using an imaging device such as an oral scanner or a computed tomography machine, and transmitted to the planning unit.
  • the plurality of scanning images includes a first scanning image of the outer surface of the target arch, a second scanning image of the outer surface of the grand arch, and a third scanning including image information about the combined byte (not shown). May contain images. That is, the surface information 2d of the target arch is obtained from the first scanning image, and the surface information of the arch arch is obtained from the second scanning image.
  • the image information on the combined byte includes information obtained by scanning the combined byte and information obtained by scanning the target arch and the grand arch that are occluded by the combined byte. .
  • a match rate between image units of each preset comparison area of the first scanning image and the second scanning image and a corresponding area of the third scanning image is calculated.
  • each comparison area of the first and second scanning images is aligned and arranged in the corresponding area of the third scanned image.
  • the surface information 2d of the target arch and the surface information of the arch arch are included in the three-dimensional work image 1d in a state arranged to correspond to the vertical height.
  • the CT image is obtained by directly imaging the oral cavity in a state in which the binding bite is combined to correspond to the vertical height using a computed tomography machine.
  • the CT image includes 3D data of the alveolar bone on the side of the target arch, excluding soft tissues such as lips, cheek mucosa, and gums through which radiation is transmitted due to its low density.
  • the CT image may include three-dimensional data of the antagonal teeth spaced from the target arch side and corresponding to the vertical height by the combination byte.
  • the placement information of the fixture and the digital abutment may be set in correspondence with the abutment coupling portion profile displayed on the scanning image and the CT image by protruding outside the gum portion of the target arch. That is, in the first scanning image, the surface information 2d of the target arch in which the coupling part profile protrudes outward from the gum part may be displayed in three dimensions.
  • the coupling portion profile displayed in the three-dimensional working image 1d includes surface information scanned with respect to the coupling portion of the abutment previously erected in the target arch and the virtual abutment 100k. It is desirable to understand.
  • the surface information of the target arch on which the coupling part profile is displayed, and the surface information of the arch arch spaced apart in correspondence with the vertical height are imaged and displayed in three dimensions.
  • the design information (300d) of the artificial crown is generated in the three-dimensional work image (1d) including the surface information (2d) of the target arch, the surface information of the grand arch, and the implantation information.
  • design information 300d of the artificial crown in which the virtual fitting groove 301d corresponding to the outer profile of the coupling portion of the virtual abutment 100k is set is generated by the planning unit.
  • the inner profile of the virtual fitting groove 301d is set to an outer profile substantially corresponding to the outer profile of the coupling portion of the virtual abutment 100k.
  • a curable resin may be filled and cured between the outer surface of the coupling part 13 made in real form and the inner surface of the mating groove to be formed so as to be spaced apart in correspondence with a predetermined gap gap so that the gap is corrected.
  • the artificial crown is finally manufactured in response to the design information 300d of the artificial crown (s40).
  • the design information 300d of the artificial crown is manufactured substantially corresponding to the real artificial crown and has the same size and shape.
  • the virtual fitting groove 301d substantially corresponds to the real fitting groove and has the same size and shape.
  • the real artificial crown fitting groove manufactured in response to the design information 300d of the artificial crown is manufactured with an inner profile substantially corresponding to the outer surface profile of the real digital abutment coupling part 13. Therefore, when the final dental restoration is installed, the degree of conformity with the digital abutment is remarkably improved, so that the mastication sensitivity of the subject to be treated can be improved.
  • a virtual abutment that corresponds accurately is extracted from the digital library using a three-dimensional working image in which a plurality of types of digital abutments provided as fine sizes are placed in the oral cavity.
  • the present invention can be applied in the manufacturing industry of dental restoration products.

Landscapes

  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Dental Preparations (AREA)

Abstract

Afin d'améliorer la commodité de procédures et de taux de reconnaissance de balayage, un procédé de fabrication d'un matériau de restauration dentaire à l'aide d'un pilier prothétique numérique est décrit dans la présente invention, le procédé comprenant : une première étape dans laquelle une arcade dentaire cible, dans laquelle est inséré un pilier prothétique numérique, est balayée par un dispositif de balayage intrabuccal, un marquage d'identification unique permettant une reconnaissance par traitement d'image de balayage étant formé sur une partie supérieure du pilier prothétique numérique ; une deuxième étape dans laquelle le pilier prothétique numérique, balayé par le dispositif de balayage intrabuccal, et des informations de surface concernant l'arcade dentaire cible sont acquis par conversion en données numériques tridimensionnelles par le biais d'un traitement d'image de balayage, et une image de travail tridimensionnelle qui comprend des informations de surface concernant la butée numérique convertie en données numériques tridimensionnelles est générée ; une troisième étape dans laquelle un pilier prothétique virtuel, extrait d'une bibliothèque numérique en correspondance avec le marquage d'identification unique du pilier prothétique numérique, est virtuellement mis en réseau et remplacé dans l'image de travail tridimensionnelle, et des informations de conception sont générées à partir d'une couronne artificielle dans laquelle une rainure virtuelle correspondant au profil externe du pilier prothétique virtuel est définie ; et une quatrième étape dans laquelle la couronne artificielle est finalement fabriquée pour correspondre aux informations de conception.
PCT/KR2020/003415 2019-03-25 2020-03-12 Pilier prothétique numérique et procédé de fabrication de matériau de restauration dentaire l'utilisant WO2020197133A1 (fr)

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EP4358023A1 (fr) * 2022-09-05 2024-04-24 Medit Corp. Appareil et procédé de traitement d'image

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TW202034862A (zh) 2020-10-01
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