WO2022030740A1

WO2022030740A1 - Scanmarker and method using same for facebow transfer to virtual articulator

Info

Publication number: WO2022030740A1
Application number: PCT/KR2021/006931
Authority: WO
Inventors: 한종목
Original assignee: 한종목
Priority date: 2020-08-07
Filing date: 2021-06-03
Publication date: 2022-02-10

Abstract

The scanmarker for a physical articulator according to the present invention is for a facebow transfer of oral cavity scan data to a virtual articulator and comprises: a fixing part which attaches to a physical articulator; and a scan recognition part, extending perpendicularly from the fixing part, for identifying the relative position, in a three-dimensional space, of a bite fork of a facebow disposed in the physical articulator.

Description

Scan marker and facebow transfer method to virtual articulator using the same

The present invention relates to a technology for transferring the oral scan data of a patient acquired using an oral scanner to a virtual articulator provided by a dental CAD program.

In general, the articulator is an instrument used for manufacturing and diagnosing dentures, crown restorations, prostheses, etc. by measuring the occlusal state of teeth and gums. A device that mechanically mimics movement. The articulator is not only used for diagnosing diseases that can occur due to occlusion problems and establishing a treatment plan, but also is a device used in various dental treatments such as implants and orthodontics.

1 shows a conventional real articulator. As shown in Figure 1, the real articulator 10 is provided with

bases

11 and 12 on the upper and lower portions, respectively, and the upper and

lower bases

11 and 12, respectively, and the upper and

lower mounting plates

13 and 14 are detachable. placed possible. The maxillary model 21 and the mandibular model 22 acquired from the patient are arranged in a three-dimensional space according to the occlusal surfaces of the maxillary and mandibular teeth acquired through a facebow. That is, the maxillary model 21 and the mandibular model 22 are mounted on the upper and lower mounting plates 13 using

fixing materials

21a and 22a such as gypsum so that they are arranged along the occlusal surface of the round wheel in the real articulator 10. , 14) (generally this process is called mounting). In the state in which the maxillary model 21 and the mandibular model 22 are occluded in this way, the occlusion state is checked while moving up, down, left and right or back and forth.

In addition, the occlusal surface of the patient's teeth is acquired through a facebow. That is, as shown in FIG. 2 , the facebow is configured such that the bite fork 33 is mounted on the base frame 31 that is hung and fixed to the patient's ear so that the bite fork 33 can move freely from the base frame 31 . . The bite fork 33 to which the impression material (or wax) 34 is applied is bitten in the patient's mouth, so that the patient's tooth arrangement can be confirmed by releasing the pattern. Both ends 32 of the base frame 31 are fixed to both ears of the patient, and the base frame 31 is additionally fixed to the patient's forehead side to adjust the horizontal state, and By fixing the position, find the occlusal surface of the patient's teeth. The tooth occlusal surface found in this way is transferred to the maxillary model 21 and the mandible model 22 by fixing the base frame 31 to the condyl 15 of the articulator 10 (this transition process is performed by Facebow transfer) transfer).

Meanwhile, with the development of digital dentistry, many prostheses are being designed using a dental CAD program. The oral scanner has been continuously developed since Mormann and Brandestini of the University of Zurich in Switzerland introduced it in the early 1980s, and in the 2000s, other companies introduced various methods and types of equipment and started to be distributed to dentistry. In addition, as the dental CAD program developed, a virtual articulator function was added, which is a useful method to replace the real articulator. However, to transfer to the virtual articulator using the traditionally used facebow method, after taking an impression, a model was made, mounted on the articulator, and scanned with a model scanner and moved.

The virtual articulator provided by the above-described dental CAD program cannot be used when manufacturing a prosthesis without models for the maxilla and mandible using an intraoral scanner. Conventionally, when a virtual articulator is to be used, methods using standardized facial photos to utilize data on an average human positional relationship between the maxilla and the mandible, or using Cone Beam Computed Tomography (CBCT), etc. have been used. However, it is difficult to accurately understand the maxilla and mandibular structure of each patient using standardized facial photographs, and using expensive CBCT is difficult to use universally in terms of convenience and cost.

The present invention is to solve the problems of the prior art described above, and without making a model for the patient's maxilla and mandible, the oral scan data acquired through an oral scanner using a traditionally used facebow can be converted into a dental CAD program. The purpose of the present invention is to provide a scan marker for the real articulator for acquiring oral scan data that can be mounted on the virtual articulator provided by

Objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood from the description below.

A scan marker for a real articulator according to the present invention is for facebow transfer of oral scan data to a virtual articulator, comprising: a fixing part mounted on the real articulator; It is formed extending in the vertical direction from the fixing part, the scan recognition unit for identifying the relative position in three-dimensional space with respect to the bite fork of the facebow installed in the real articulator; may be configured to include.

Here, the scan recognition unit may be formed detachably from the fixing unit.

In addition, a label for indicating a position in three-dimensional space may be formed on the outer peripheral surface of the scan recognition unit. Preferably, the cover part is formed to protrude from the outer peripheral surface of the scan recognition part and is formed of a plurality of protrusions whose outer surface is curved.

In addition, it is preferable that the outer peripheral surface of the scan recognition unit is formed in a curved surface.

Furthermore, it is more preferable that the scan recognition unit is formed in the shape of a cone whose diameter decreases from the fixing part to the upper part.

In another aspect, the present invention comprises the steps of: acquiring position data of a virtual scan marker on a three-dimensional virtual space of a virtual articulator provided in a dental CAD program; manufacturing a scan marker for a real articulator having the same shape and standard as the virtual scan marker; Acquiring a first 3D oral scan data by scanning the inside of the patient's mouth using an oral scanner; transferring the occlusal surface of the patient's teeth to a facebow using a facebow including a bite fork in the real articulator in which the scan marker for the real articulator is installed; acquiring second 3D oral scan data by scanning the scan marker for the real articulator and the bite fork using an oral scanner; It provides a facebow transfer method to a virtual articulator using a scan marker comprising; aligning the first and second 3D oral scan data based on the position data of the virtual scan marker.

In another aspect, the facebow scan marker for the facebow transfer to the virtual articulator according to the present invention comprises: a fastening part fastened to the base frame of the facebow; a rotating unit including a fixed block extending from the fastening unit and a rotating block rotatably installed on the fixed block; A guide bar which is inserted into the guide groove provided in the rotation block to allow retracting and withdrawal, and a marker for identifying a relative position in three-dimensional space with respect to the bite fork formed at one end of the guide bar and installed on the facebow. and a scan recognition unit, wherein the cover unit of the scan recognition unit determines position data in advance on a three-dimensional virtual space of a virtual articulator provided by a dental CAD program.

Here, the fastening portion, a pair of brackets mounted on the base frame; It may include; a fixing screw provided on each of the brackets for fixing to the bait frame.

In addition, the cover part may include a plurality of protrusions having a curved outer surface.

In another aspect, the present invention comprises the steps of: acquiring position data of a virtual scan recognition unit on a three-dimensional virtual space of a virtual articulator provided in a dental CAD program; manufacturing a scan recognition unit having the same shape and standard as the virtual scan recognition unit; obtaining three-dimensional oral scan data by scanning the bite fork and the scan recognition unit using an oral scanner after taking an impression of the patient using a facebow equipped with a scan marker for a facebow having the scan recognition unit installed; By aligning the oral scan data to the virtual articulator based on the position data of the scan recognition unit included in the oral scan data and the position data of the virtual scan recognition unit, facebow transfer of the occlusal surface of the patient's teeth to the virtual articulator It provides a facebow transfer method to a virtual articulator using a facebow scan marker including ;.

In the process of manufacturing the prosthesis, the traditional method is to make a maxillary model and a mandible model and transfer the face beam to the real articulator, but this has the disadvantage of being a very cumbersome operation. In order to avoid this inconvenience, to use the virtual articulator provided by the dental CAD program, using the average value of a general person is not preferable in terms of accuracy because it does not take into account the specificity of each patient. In addition, the method of obtaining three-dimensional scan data using CBCT is practically difficult due to the increase in radiation risk, inconvenience of use, and cost. When the scan marker according to the present invention is used, it is easy to transfer the oral scan data acquired through the commonly used facebow and oral scanner to the virtual articulator, so the advantage of the virtual articulator provided by the dental CAD program is maximized. can do.

1 is a view showing a real articulator for dental use.

2 is a view showing a generally used facebow.

Figure 3 is a screen image showing the state in which the upper base of the virtual articulator, the maxillary mounting plate, the mandible mounting plate and the lower base are aligned on the dental CAD program.

4 is a screen image showing a state in which the virtual scan marker designed on the CAD program is placed on the mandibular mounting plate.

5 is a view showing a scan marker for a real articulator according to the present invention.

6 shows a state in which the scan marker according to the present invention is mounted on the real articulator.

7 shows a state in which the face bow is placed in the real articulator in which the scan marker is installed.

8 shows a state in which the three-dimensional oral scan data scanned by the bite fork and the scan recognition unit through the oral scanner in the real articulator is displayed in a virtual space.

9 shows a state in which the virtual scan markers are aligned in the virtual articulator.

10 shows a state in which oral scan data is matched based on location information of a virtual scan marker and a real scan marker.

11 shows the face-bow transfer of oral scan data in the virtual articulator.

12 shows a scan marker for a real articulator according to another embodiment.

13 is a flowchart illustrating a process of face-forward transfer of oral scan data acquired through an oral scanner to a virtual articulator using a scan marker for a real articulator according to the present invention.

14 is a perspective view showing a scan marker for a face bow according to the present invention.

15 is a schematic view showing a state in which the scan recognition unit is installed in the rotating part in the scan marker for a face bow according to the present invention.

16 is a screen image showing a state in which the virtual scan recognition unit designed in the virtual space (S) of the dental CAD program is placed on the mandible mounting plate of the virtual articulator.

17 shows a state in which an impression of a patient is obtained by mounting a scan marker according to the present invention to a facebow.

Here, the scan recognition unit may be formed detachably from the fixing unit.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail through the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. In addition, numbers (eg, first, second, etc.) used in the description process of the present specification are only identification symbols for distinguishing one component from other components.

Conventionally, widely used dental CAD programs include EXOCAD, Dental System (3shape), etc., and a virtual articulator that uses a model scanner to provide the positions of the maxillary and mandibular models mounted on the physical articulator in the CAD program. (Virtual Articulator) (this process is called facebow transfer). On the other hand, in the present invention, a facebow transfer method is provided without using a maxillary and mandibular model and a model scanner. On the contrary, in the present invention, a scan marker for a facebow and a method thereof are provided, which can directly transfer a facebow to a virtual articulator using a facebow and an oral scanner without using a model scanner.

Hereinafter, detailed contents for carrying out the present invention will be described with reference to FIGS. 3 to 13 .

3 shows a screen image showing a state in which the upper base 11a, the maxillary mounting plate 13a, the mandible mounting plate 14a, and the lower base 12a of the virtual articulator 10a are aligned on the dental CAD program. 4 shows a screen image showing a state in which the virtual scan marker 200a designed on the CAD program is placed on the mandible mounting plate 14a.

First, as shown in FIG. 3 , the maxilla and mandibular mounting

plates

13a and 14a of the virtual articulator 10a are aligned in the virtual space S on the dental CAD program. Then, design a scan marker for the real articulator to be used for oral scanning (the scan marker for the real articulator designed in this way on the CAD program is called a virtual scan marker). The virtual scan marker 200a is designed to have a virtual fixing unit 210a and a virtual scan recognition unit 220a whose relative positions are determined with respect to the maxilla or

mandibular mounting plates

13a and 14a. That is, the shape and standard of the virtual scan marker 200a are used as a three-dimensional model for manufacturing the scan marker 200 for a real articulator to be described later.

As described above, the virtual scan markers 200a are arranged in accordance with any one of the aligned upper and

lower mounting plates

13a and 14a. Through this, information on the relative position of the virtual scan marker 200a with respect to any one of the maxillary and

mandibular mounting plates

13a and 14a on the three-dimensional virtual space S within the virtual articulator 10a (ie, position data) ) can be obtained (S10 in FIG. 13)

As described above, the virtual scan marker 200a designed through the dental CAD program can be manufactured as the real articulator scan marker 200 using, for example, a 3D printer (S20 in FIG. 13). The scan marker 200 for the real articulator may be manufactured using various materials such as synthetic resin. 5 shows a scan marker 200 for a real articulator according to the present invention. As shown in FIG. 5 , the scan marker 200 for the real articulator 200 is formed by a fixing part 210 mounted on the real articulator, and extending in the vertical direction from the fixing part 210 , and is attached to the real articulator 10 . It may include a scan recognition unit 220 for identifying the relative position in 3D space with respect to the bite fork 33 of the installed facebow 30 .

The scan recognition unit 220 is a means for identifying the relative position of the facebow 30 disposed in the real articulator 10 with respect to the bite fork 33 in three-dimensional space, and is detachable from the fixing unit 210 . It may be formed in such a way that it may be formed integrally with the fixing part 210 . The fixing unit 210 may be designed in various shapes and sizes according to the shapes and sizes of the mounting

plates

13 and 14 provided by the manufacturer of the real articulator 10 . As shown in FIG. 5 , a coupling protrusion 222 and a coupling groove 212 are respectively formed in the scan recognition unit 220 and the fixing unit 210 to be detachably formed. In this case, during the oral scanning process, the coupling protrusion 222 and the coupling groove 212 are firmly coupled to each other so that the relative positions of the scan recognition unit 220 and the base unit 210 designed on the CAD program do not change. It is preferable to make it firmly fixed. In this way, when the scan recognition unit 220 and the fixing unit 210 are manufactured as separate members to be detachably configured, the fixing unit 210 of various dimensions can be separately manufactured and used according to the type of the real articulator. . In addition, when the scan recognition unit 220 and the fixing unit 210 are integrally formed, the fixing unit 210 may mean a lower region of the scan marker 200 fixed to the mounting plate of the real articulator.

Meanwhile, when manufacturing the scan marker 200 for the real articulator, the same structure as the mounting

plate

13a or 14a of the virtual articulator 10a may be additionally formed under the fixing part 210 . For example, as shown in FIG. 12 , a plate-shaped part 230 having a shape that can be fastened to the base 11 or 12 of the real articulator 10 may be further formed under the fixing part 210 . The standard and shape of the mounting plate may be different depending on the manufacturer. When the plate-shaped part 230 is formed, the scan marker 200 according to the present invention is shared with the

bases

11 and 12 of the real articulators of different manufacturers. can be used

In addition, on the outer peripheral surface of the scan recognition unit 210, a label unit 221 for indicating the position of each part in a three-dimensional space may be formed. The label unit 221 allows the local area of the scan recognition unit 210 to be clearly recognized in the oral scan data acquired using the oral scanner. The label 221 is not limited as long as it has a shape that can be identified in the oral scan data, and may have, for example, a protrusion, a groove, or any other shape. In particular, the cover part 221 is formed to protrude from the outer peripheral surface of the scan recognition unit 220 and may be formed with a plurality of protrusions. In this case, it is preferable that the outer surface of each protrusion is formed in a curved surface. When the outer surface of the protrusion has an angled edge in the scanning process using the oral scanner, the recognition rate may be reduced due to diffuse reflection. Similarly, the outer surface of the scan recognition unit 220 is preferably formed in a curved surface. Thereby, during the oral scanning process, it is possible to prevent the occurrence of diffuse reflection from the outer surface of the scan recognition unit 220.

In addition, the scan recognition unit 220 has a long length in the vertical direction from the fixing unit 210 , that is, in the vertical direction from the plane formed by the

bases

11 and 12 or the mounting

plates

13 and 14 of the real articulator 10 . It is preferred to have an elongated shape. As will be described later, since the area that can be covered through the oral scanner is very small (usually scans an area of about 15 mm × 15 mm), the scan recognition unit 220 and the bite fork 33 (precisely model the patient's tooth arrangement) It should be possible to simultaneously secure the relative position information of the impression material or wax fixed). To this end, when the scan recognition unit 220 and the bite fork 33 are disposed in the real articulator 10, the separation distance should be minimized while not touching each other. Therefore, in the scan recognition unit 220, within a space in which the bite fork 33 can be disposed, the interval between the bite fork 33 and one area of the scan recognition unit 220 adjacent to the bite fork 33 can be properly maintained. Thus, it may be manufactured in a shape such as a long column or horn in the vertical direction. Through this, according to the structure between the temporomandibular joint and the dental occlusal surface of the patient, the bite fork 33 fixed through the facebow 30 can be any between the upper and lower mounting

plates

13 and 14 of the real articulator 10 . Even if the position is arranged, the distance between the scan recognition unit 220 and the bite fork 33 may be maintained at a minimum interval.

A method of mounting the oral scan data acquired through the oral scanner using the scan marker 200 for the real articulator according to the present invention described above on the virtual articulator 10a provided by the dental CAD program will be described as follows.

According to a conventional method, three-dimensional oral scan data (hereinafter, first 3D oral scan data) is acquired by scanning the inside of the patient's mouth using an oral scanner (S30 in FIG. 13). The first 3D oral scan data has information on the dental arrangement state of the maxilla and the mandible. After that, the pattern of the patient's tooth structure is drawn through the bite fork to which the impression material (wax) is applied, and the bite fork is fixed according to the occlusal surface of the patient's teeth through the face bow. Accordingly, it is possible to obtain information about the patient's temporomandibular joint and the relative structure of the upper and lower jaws. 6 shows a state in which the scan marker 200 according to the present invention is mounted on the real articulator 10 . As shown in FIG. 6 , the scan marker 200 may be mounted on the lower mounting plate 14 of the real articulator.

Thereafter, the facebow obtained by taking the patient's impression is placed in the real articulator 10 (this process is referred to as a facebow transfer to the real articulator) (S40 in FIG. 13). 7 shows a state in which the face bow is placed in the real articulator in which the scan marker 200 is installed. As shown in FIG. 7, by scanning the periphery of the bite fork 33 and the scan recognition unit 220 in the real articulator with the scan marker 200 and the face bow installed through the oral scanner, three-dimensional oral scan data (hereinafter, the second 3D oral scan data) is acquired (S50 of FIG. 13). At this time, the impression material 34 from which the patient's tooth structure is copied is disposed on the bite fork 33 in a solidified state.

Information about the patient's maxilla and mandibular tooth arrangement can be known through the first 3D oral scan data, and information about the three-dimensional structure between the patient's temporomandibular joint and the maxilla is transferred to the real articulator through the facebow. Through the second 3D oral scan data acquired in the state, it is possible to know three-dimensional position information between the scan recognition unit 220 and the bite fork (tooth arrangement structure by the impression material). In addition, in the virtual scan marker 200a designed by the CAD program above, relative position information (ie, position coordinate information of the virtual scan marker) with respect to the mounting plate of the virtual articulator in the three-dimensional virtual space is stored in advance. Therefore, the first 3D oral scan data and the second 3D oral scan data are provided by the CAD program based on the coordinates of the virtual scan markers 200a aligned with the mounting

plate

13a or 14a of the virtual articulator 10a. When aligned, the first and second oral scan data may be transferred facebow to the virtual articulator 10a (S60 of FIG. 13).

8 shows a screen image showing a state in which the second 3D oral scan data is arranged in a three-dimensional virtual space (S). In FIG. 8 , the second 3D oral scan data includes position information 34a for the impression material fixed to the bite fork and position information 220b for the scan recognition unit 220 . 9 shows a screen image showing a state in which the virtual articulator 10a and the virtual scan marker 200a are aligned according to a predetermined position in the virtual space S. Position information of the virtual scan marker 200a aligned with the virtual articulator 10a of FIG. 9 (especially coordinate information on the scan recognition unit 220a) and the real articulator included in the second 3D oral scan data of FIG. Based on the location information for the scan marker 200 (in particular, the coordinate information 220b for the scan recognition unit 220), if both are matched, the second 3D oral scan data is aligned on the virtual articulator 10a. can Again, if the position information on the tooth part included in the first 3D oral scan data is matched with the position information 34a for the impression material of the second 3D spherical scan data, the first 3D oral scan data is virtualized as shown in FIG. It can be aligned on the articulator (10a). In this case, both may be matched based on the cover part 221a of the virtual scan marker 200a and the cover part 221 of the real scan marker 200 as a reference. Through this process, it is possible to face forward transfer the first and second 3D oral scan data acquired through the oral scanner to the virtual articulator. Thereafter, as shown in FIG. 11 , by removing the virtual scan marker 200a, the virtual articulator 10a can be used in the same environment as in the real articulator 10 .

Next, detailed contents of the scan marker for pacebo according to the present invention will be described with reference to FIGS. 14 to 17 .

First, FIG. 14 shows a scan marker 100 for a facebow according to the present invention. As shown in FIG. 14 , the scan marker 100 for the facebow includes a fastening part 110 fastened to the base frame 31 of the facebow 30 , and a rotating part 120 extending from the fastening part 110 . ) and the scan recognition unit 130 coupled to the rotating unit 120 may be configured.

Here, the fastening part 110 is for mounting and fixing the scan marker 100 to the base frame 31 of the facebow 30 . The fastening unit 110 is a means for fixing the scan marker 100 to the base frame 31 in advance when taking an impression of the patient using the face bow 30 . Preferably, the fastening part 110 is provided on a pair of brackets 112 and each bracket 112 to securely fix the position on the base frame 31 to attach the scan marker 100 to the base frame 31 . ) may be configured to include a fixing screw 111 for fixing to the. Here, the pair of brackets 112 maintains a horizontal state so that the position of the scan recognition unit 130 does not change when taking an impression through the face bow 30 .

On the other hand, as shown in FIG. 15 , the rotating unit 120 may include a fixed block 121 extending from the fastening unit 110 and a rotating block 122 rotatably installed on the fixed block 121 . have. Here, the fixing block 121 is formed to extend from the fastening part 110 through the connection part 113 . The rotation block 122 is installed on the fixing block 121 through the screw 123 and the nut 124 . The rotation block 122 is rotatably installed with the screw 123 as an axis with respect to the fixed block 121 .

In addition, a guide groove 122a is provided in the rotation block 122, and the scan recognition unit 130 is installed in the guide groove 122a. The scan recognition unit 130 is three-dimensional for the guide bar 132 inserted into the guide groove 122a to be drawn in and drawn out, and the bite fork formed at one end of the guide bar 132a and installed in the facebow 30 . It may be configured to include a marker 131 for identifying a relative position in space. The label unit 131 allows the local area of the scan recognition unit 130 to be clearly recognized in the oral scan data acquired using the oral scanner. The label 131 is not limited as long as it has a shape that can be identified in the oral scan data, and may have, for example, a protrusion, a groove, or any other shape. In particular, the label 131 may include a plurality of protrusions 131a protruding from the outer circumferential surface. In this case, it is preferable that the outer surface of each of the protrusions 131a is formed in a curved surface. When the outer surface of the protrusion has an angled edge in the scanning process using the oral scanner, the recognition rate may be reduced due to diffuse reflection.

Then, a method of transferring the patient's impression to the virtual articulator using the scan marker 100 for the facebow described above will be described in more detail.

16 is a screen image showing a state in which the virtual scan recognition unit 230 designed in the virtual space S of the dental CAD program is placed on the mandible mounting plate 14a of the virtual articulator. Here, the virtual scan recognition unit 230 is a three-dimensional model for manufacturing the physical scan recognition unit 130 described above (the scan recognition unit designed in the CAD program is referred to as a virtual scan recognition unit), and the virtual scan recognition unit 230 and the real scan recognition unit 130 have substantially the same shape and standard. For example, the virtual scan recognition unit 230 is designed to have the same configuration as the detailed configuration of the real scan recognition unit 130 described above, that is, the virtual scan recognition unit 230 is a virtual cover unit corresponding to the cover unit 131 . 231 , a virtual guide bar 232 corresponding to the guide bar 132 , and a virtual protrusion 231a corresponding to the protrusion 131a. In particular, the virtual cover unit 231 of the virtual scan recognition unit 230 and the cover unit 131 of the real scan recognition unit 130 have the same shape and standard. In addition, although the virtual scan recognition unit 230 is aligned based on the mandible mounting plate 14a of the virtual articulator for convenience of explanation, the maxillary mounting plate may be used as a reference. Through this, information (ie, position data) about the relative position of the virtual scan recognition unit 230 with respect to the mandible mounting plate 14a in the three-dimensional virtual space S in the virtual articulator is predetermined.

Based on the 3D data of the virtual scan recognition unit 230 designed through the dental CAD program as described above, for example, the real scan recognition unit 130 may be manufactured using a 3D printer (reference numeral 130 in FIG. 14 ). . The real scan recognition unit 130 may be manufactured using various materials such as synthetic resin. On the other hand, when the virtual scan recognition unit 230 is output using a 3D printer, the relative positions of the mandible mounting plate 14a and the virtual scan recognition unit 230 in the virtual space S of the CAD program of FIG. 16 are, It is determined by the extension 233 connecting the mandible mounting plate 14a and the virtual scan recognition unit 230 . Therefore, based on the three-dimensional data of the mandibular mounting plate 14a, the extension part 233, and the virtual scan recognition unit 230 designed in the virtual space S, the same model is manufactured. The manufactured model is placed in the real articulator in which the facebow 30 is installed, and the facebow 30 is placed in the real articulator. Thereafter, the scan marker 100 is fixed to the facebow 30 using the fastening unit 110 , and the guide bar 132 of the real scan recognition unit 130 is fastened to the rotating unit 120 . At this time, the inlet distance of the guide bar 132 and the rotation angle of the rotation block 122 are adjusted. In this way, when the scan recognition unit 130 is fixed to the scan marker 100 installed on the face bow 30, the three-dimensional position data (ie, the lower face) of the virtual scan recognition unit 230 in the three-dimensional virtual space of the virtual articulator. (The relative position of the virtual marker 231a with respect to (12a)) may be transferred to the scan marker 100 installed on the facebow 30 as it is. Next, when the extension part 233 and the model part of the mandibular mountain plate 14a are removed from the real scan recognition unit 130, the cover unit 131 of the scan recognition unit 130 is finally provided by the CAD program. In the three-dimensional virtual space of the virtual articulator, the scan marker 100 having predetermined positional data may be installed on the facebow 30 .

In this way, an impression of the patient is obtained using the facebow 30 in which the scan marker 100 is installed. That is, after a pattern of the patient's tooth structure is drawn through the bite fork 33 to which the impression material (wax) 34 is applied, the bite fork is fixed according to the occlusal surface of the patient's teeth through a face bow. Accordingly, it is possible to obtain information about the patient's temporomandibular joint and the relative structure of the upper and lower jaws. 17 shows a state in which the patient's impression is obtained after the scan marker 100 according to the present invention is installed on the facebow 30 .

After taking an impression of the patient through the facebow 30, the bite fog 33 and the scan recognition unit 131 are scanned using an oral scanner to obtain three-dimensional oral scan data. At this time, since the impression material 34 from which the patient's tooth structure is copied is disposed on the bite fork 33 in a solidified state, the three-dimensional oral scan data acquired through the oral scanner is based on the patient's upper and lower teeth arrangement. have information about

In this way, the three-dimensional oral scan data obtained through the oral scanner includes information on the tooth arrangement of the patient's maxilla and mandible (tooth arrangement structure by the impression material), and the three-dimensional structure between the temporomandibular joint and the upper and lower jaw of the patient. 3D position data for the scan recognition unit 131 is included along with the information on . In addition, the scan recognition unit 130 manufactured according to the virtual scan recognition unit 230 designed in the virtual space of the CAD program above has relative position information with respect to the mounting plate of the virtual articulator (that is, the position coordinate information of the virtual scan recognition unit) is predetermined. Therefore, the position data of the scan recognition unit 130 included in the three-dimensional oral scan data acquired through the oral scanner and the position data of the virtual scan recognition unit 230 aligned with respect to the mandible mounting plate 14a of the virtual articulator Based on , if the oral scan data is aligned with the virtual articulator, the occlusal surface of the patient's teeth can be facebow transferred to the virtual articulator.

In the process of manufacturing the prosthesis, the traditional method is to make a maxillary model and a mandible model and transfer the face beam to the real articulator, but this has the disadvantage of being a very cumbersome operation. In order to avoid this inconvenience, when using the virtual articulator of the CAD program, it is not preferable in terms of accuracy to use the average value of a general person because the specificity of each patient is not taken into account. In addition, the method of obtaining three-dimensional scan data using CBCT is practically difficult due to the increase in radiation risk, inconvenience of use, and cost. Using the scan marker for the real articulator according to the present invention, it is easy to transfer the face beam to the virtual articulator using the oral scan data acquired through the commonly used face bow and oral scanner without making a maxillary and mandibular model, You can maximize the advantages of the virtual articulator provided by the dental CAD program.

Although preferred embodiments of the present invention have been described so far, those of ordinary skill in the art to which the present invention pertains will be able to implement in a modified form within the scope without departing from the essential characteristics of the present invention. Therefore, the embodiments of the present invention described herein should be considered from an illustrative rather than a restrictive standpoint, and the scope of the present invention is indicated in the claims rather than the above description, and all differences within the equivalent scope are the present invention. should be construed as being included in

Claims

a fixing part mounted on the base or mounting plate of the real articulator;

A scan marker comprising; a scan recognition unit extending in a vertical direction from the fixing unit and identifying a relative position in a three-dimensional space with respect to the bite fork of the face bow installed in the real articulator.
The method of claim 1,

The scan recognition unit, characterized in that detachable from the fixing unit, a scan marker.
The method of claim 1,

A scan marker, characterized in that a mark indicating a position in three-dimensional space is formed on the outer peripheral surface of the scan recognition unit.
4. The method of claim 3,

The cover portion is formed to protrude from the outer peripheral surface of the scan recognition unit, characterized in that the outer surface is formed of a plurality of projections formed in a curved surface, a scan marker.
acquiring position data of a virtual scan marker on a three-dimensional virtual space of a virtual articulator provided by a dental CAD program;

manufacturing a scan marker for a real articulator having the same shape and standard as the virtual scan marker;

Acquiring a first 3D oral scan data by scanning the inside of the patient's mouth using an oral scanner;

transferring the occlusal surface of the patient's teeth to a facebow using a facebow including a bite fork in the real articulator in which the scan marker for the real articulator is installed;

acquiring second 3D oral scan data by scanning the scan marker for the real articulator and the bite fork using an oral scanner;

aligning the first and second 3D oral scan data based on the location data of the virtual scan marker;

A facebow transfer method to a virtual articulator using a scan marker comprising a.
6. The method of claim 5,

The scan marker is a facebow transfer method to a virtual articulator using a scan marker, characterized in that the scan marker according to any one of claims 1 to 4.
As a facebow scan marker for facebow transfer to a virtual articulator,

a fastening part fastened to the base frame of the facebow;

a rotating unit including a fixed block extending from the fastening unit and a rotating block rotatably installed on the fixed block;

A guide bar which is inserted into the guide groove provided in the rotation block to allow retracting and withdrawal, and a marker for identifying a relative position in three-dimensional space with respect to the bite fork formed at one end of the guide bar and installed on the facebow. A scan recognition unit that includes;

The scan marker, characterized in that the position data in the three-dimensional virtual space of the virtual articulator provided in the dental CAD program for the mark of the scan recognition unit is determined in advance.
8. The method of claim 7,

The fastening part,

a pair of brackets mounted on the base frame;

fixing screws provided on each of the brackets to fix them to the bait frame;

A scan marker comprising a.
8. The method of claim 7,

The marker portion, characterized in that it comprises a plurality of protrusions formed with a curved outer surface, a scan marker.
acquiring position data of a virtual scan recognition unit on a three-dimensional virtual space of a virtual articulator provided by a dental CAD program;

manufacturing a scan recognition unit having the same shape and standard as the virtual scan recognition unit;

obtaining three-dimensional oral scan data by scanning the bite fork and the scan recognition unit using an oral scanner after taking an impression of the patient using a facebow equipped with a scan marker for a facebow having the scan recognition unit installed;

By aligning the oral scan data to the virtual articulator based on the position data of the scan recognition unit included in the oral scan data and the position data of the virtual scan recognition unit, facebow transfer of the occlusal surface of the patient's teeth to the virtual articulator ;

A facebow transfer method to a virtual articulator using a facebow scan marker comprising a.
11. The method of claim 10,

The facebow transfer method to the virtual articulator using the scan marker, characterized in that the scan marker is the scan marker according to any one of claims 7 to 9.