Method and apparatus for providing expected error information related to implant placement

Abstract

A method and apparatus are disclosed, the method comprising the steps of: obtaining first intraoral data based on imaging or scanning an oral cavity; obtaining a guide wearing simulation model for simulating a state in which a guide template model obtained based on the first intraoral data is applied to the intraoral data; obtaining second intraoral data based on imaging or scanning performed when a guide template corresponding to the guide template model is worn on the oral cavity; obtaining a fiducial marker wearing scan model indicating a state in which the guide template is worn on the oral cavity based on the second intraoral data; and providing expected error information about the position of the implant model by using a first fiducial marker model coupled to the guided wear simulation model using fiducial markers and a second fiducial marker model corresponding to the fiducial marker wear scan model.

Description

Technical Field

[0001] The present disclosure relates to apparatus and methods for providing expected error information related to implant placement. A guide template is used to ensure accurate implant placement. The present disclosure relates to techniques for improving the accuracy of a guide template prior to implant placement. Background Art

[0002] In conventional dental implant surgery, a method of establishing an implant surgery plan using software prior to the surgery has been used.

[0003] The process of using software to establish a dental implant surgery plan usually involves obtaining the patient's CT data and scan data, aligning them, and formulating a surgical plan based on the patient's anatomical structure to determine the position of the implant structure (e.g., implant, base, crown, anchor pin, etc.), and then designing the shape of the surgical guide according to the planning information. Afterwards, a 3D printer is used to print the guide. At this point, it is important to identify the errors in the process of using software to design and print the surgical guide and any errors that may be generated by incorrectly fastening the surgical guide during surgery before the surgery itself. Otherwise, the implant may be placed in a position different from the planned position. Therefore, the accuracy of the surgical guide implant placement position before the implant is placed is crucial. Therefore, the following technology is needed, which provides a specific method for providing expected error information to ensure accurate implant placement positioning before the implant is placed. Summary of the invention

[0004] Technical issues

[0005] The embodiments of the present disclosure are intended to solve the above-mentioned problems of the prior art, specifically the problem that the implant placement position determined by the conventional surgical guide may be inaccurate, and the purpose of the present disclosure is to provide an accurate implant placement position for each patient's oral cavity before implant placement. In addition, the embodiments of the present disclosure are intended to solve the above-mentioned problems of the prior art by providing error information about the three-dimensional virtual implant placement position before surgery. The technical objectives to be solved are not limited to those problems mentioned above, and various other objectives may be further included within the scope that is obvious to ordinary technicians in the field.

[0006] Technical Solutions

[0007] According to the first aspect of the present disclosure, a method performed by a device for providing expected error information related to implant placement may include the following steps: obtaining first intraoral data based on imaging or scanning of the oral cavity; obtaining a guide wearing simulation model for simulating a state in which a guide template model obtained based on the first intraoral data is applied to the intraoral data; obtaining second intraoral data based on imaging or scanning performed when a guide template corresponding to the guide template model is worn on the oral cavity; obtaining a reference marker wearing scanning model indicating a state in which the guide template is worn on the oral cavity based on the second intraoral data; and providing expected error information about the position of the implant model by using a first reference marker model connected to the guide wearing simulation model and a second reference marker model corresponding to the reference marker wearing scanning model.

[0008] A guidance template may be generated based on a guidance template model and may be used to couple one or more fiducial markers.

[0009] The step of providing expected error information may include the step of obtaining the expected error information based on a comparison result between a first expected position of the implant model determined by the position of the first reference marker model and a second expected position of the implant model determined by the position of the second reference marker model.

[0010] The step of providing expected error information may include the following steps: determining a first expected position based on a first axial direction oriented by a first reference marker model and the positions of a plurality of first reference points on the first reference marker; determining a second expected position based on a second axial direction oriented by a second reference marker model and the positions of a plurality of second reference points on the second reference marker; and obtaining expected error information based on a comparison result between the first expected position and the second expected position.

[0011] The step of providing expected error information may include the following steps: obtaining a first gingival reference point for a guide wearing simulation model; obtaining a second gingival reference point for a reference marker wearing scanning model; obtaining an intraoral matching model, in which the guide wearing simulation model and the reference marker wearing scanning model are matched relative to the first gingival reference point and a second gingival reference point corresponding to the first gingival reference point; and superimposing and displaying an implant model of a first expected position and an implant model of a second expected position based on the intraoral matching model.

[0012] The step of providing expected error information may include the following steps: automatically or based on user input, obtaining a first gingival reference point for a guide wearing simulation model; obtaining relative position information indicating the relative position relationship between the first gingival reference point and the first reference marker model; obtaining a second gingival reference point on the reference marker wearing scanning model corresponding to the first gingival reference point based on the relative position information; obtaining an intraoral matching model, in which the guide wearing simulation model and the reference marker wearing scanning model are matched by aligning the first gingival reference point and the second gingival reference point; and obtaining expected error information based on the intraoral matching model.

[0013] The position of the automatically obtained gingival reference point can be generated on the area of ​​the entire guide wearing simulation model that does not include the guide template model or on the area of ​​the entire reference marker wearing scanning model that does not include the guide template, and the user input can be applied to the area of ​​the entire guide wearing simulation model that does not include the guide template model or the area of ​​the entire reference marker wearing scanning model that does not include the guide template model.

[0014] The relative position information may include distance information between a plurality of first reference points on the first fiducial marker model and the first gingival reference point or distance information between a plurality of second reference points on the second fiducial marker model and the second gingival reference point.

[0015] The step of obtaining the intra-oral matching model may include obtaining the intra-oral matching model by updating a viewpoint of the first intra-oral data or a viewpoint of the second intra-oral data in a state where the first gingival reference point and the second gingival reference point are aligned.

[0016] According to a second aspect of the present disclosure, an apparatus for providing expected error information related to implant placement may include a processor configured to: obtain first intraoral data based on imaging or scanning of the oral cavity; obtain a guide wearing simulation model for simulating a state in which a guide template model obtained based on the first intraoral data is applied to the intraoral data; obtain second intraoral data based on imaging or scanning performed when a guide template corresponding to the guide template model is worn on the oral cavity; obtain a reference marker wearing scanning model indicating a state in which the guide template is worn on the oral cavity based on the second intraoral data; and provide expected error information about the position of the implant model by using a first reference marker model connected to the guide wearing simulation model and a second reference marker model connected to the reference marker wearing scanning model.

[0017] A guidance template may be generated based on a guidance template model and may be used to couple one or more fiducial markers.

[0018] The processor can obtain expected error information based on a comparison result between a first expected position of the implant model determined by the position of the first reference marker model and a second expected position of the implant model determined by the position of the second reference marker model.

[0019] The processor can determine a first expected position based on a first axial direction oriented by the first reference marker model and the positions of multiple first reference points on the first reference marker, determine a second expected position based on a second axial direction oriented by the second reference marker model and the positions of multiple second reference points on the first reference marker, and obtain expected error information based on a comparison result between the first expected position and the second expected position.

[0020] The processor can: automatically or based on user input obtain a first gingival reference point for a guide wearing simulation model; obtain relative position information indicating a relative positional relationship between the first gingival reference point and a first reference marker model; obtain a second gingival reference point corresponding to the first gingival reference point on a reference marker wearing scanning model based on the relative position information; obtain an intraoral matching model in which the guide wearing simulation model and the reference marker wearing scanning model are matched by aligning the first gingival reference point and the second gingival reference point; and obtain expected error information based on the intraoral matching model.

[0021] According to a third aspect of the present disclosure, a computer-readable non-transitory recording medium may be provided, on which a program is stored, and when the program is executed by a computer system, the computer system implements the method of the first aspect.

[0022] Beneficial Effects

[0023] According to an embodiment of the present disclosure, the method or apparatus according to the present disclosure is effective in determining an intended three-dimensional virtual implant position based on a specific shape and position of a fiducial marker because the implant placement position is determined using the fiducial marker.

[0024] In addition, the method or device according to the present disclosure improves efficiency by providing expected surgical error information by comparing the three-dimensional virtual implant position planned for surgery using fiducial markers with the position of the three-dimensional virtual implant based on the position of the guide coupled in the patient's mouth. This allows the user to use this information to adjust the coupling of the guide or redesign the guide.

[0025] In addition, since the method or device according to the present disclosure provides expected error information about the implant placement position to the user's account, allowing the guide to be adjusted or generated based on the information, it can help determine an implant placement position that is more suitable for the patient's mouth, thereby improving the satisfaction of both the user and the patient.

[0026] Furthermore, because the oral cavity is scanned using an intraoral scanner rather than by having fiducial markers attached and performing a CT scan, there is no additional radiation exposure.

[0027] Effects according to the embodiments of the present disclosure are not limited to the above-described effects, and other effects that are not described will be clearly understood by those skilled in the art from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a block diagram illustrating an example of a configuration of a device according to an embodiment.

[0029] Figure 2 is a flow chart illustrating a method performed by an apparatus for providing expected error information related to implant placement according to an embodiment.

[0030] Figure 3 Illustrated are guide template models and implant positions according to embodiments.

[0031] Figure 4 An example of performing an intra-oral scan with a guide template and fiducial markers coupled in a patient's mouth is illustrated in accordance with an embodiment.

[0032] Figure 5 An example is illustrated of a device according to an embodiment using a guide wear simulation model to provide information about the position of an implant, the information of the implant position being determined based on reference markers coupled to the guide template model.

[0033] Figure 6 An example of an apparatus according to an embodiment using a fiducial marker wearing scan model to provide information about the position of an implant determined based on fiducial markers coupled to a guide template is illustrated.

[0034] Figure 7 The diagram illustrates a case where the apparatus according to the embodiment aligns the guide wearing simulation model and the reference marker wearing scanning model based on the reference marker model.

[0035] Figure 8 An example of a method of determining at least one reference point within a fiducial marker according to an embodiment is illustrated.

[0036] Fig. 9 An example is illustrated showing a state in which a guide template according to an embodiment is worn in the oral cavity of a patient.

[0037] Fig.10 An example of a method performed by a device for determining a second gingival reference point by using distance information of a first gingival reference point and a fiducial marker according to an embodiment is illustrated.

[0038] Fig.11 An example of a method for obtaining a first graphic and a second graphic performed by a device according to an embodiment is illustrated.

[0039] Fig.12 An example of a case where there is no fitting error in the intra-oral matching model according to an embodiment is illustrated.

[0040] Fig.13 An example of a case where a fitting error occurs in the intra-oral matching model according to an embodiment is illustrated.

[0041] Fig.14 An example of a graphical user interface (UI) providing an alignment screen showing the oral cavity of a patient with a guide template model and a guide template affixed thereto is illustrated according to an embodiment.

[0042] Fig.15 An example of a graphical UI providing a screen showing an image of an implant according to matching of a first expected position and a second expected position is illustrated in accordance with an embodiment.

[0043] Fig.16 An example of a method performed by a device for updating each reference point to eliminate a fitting error in an intra-oral matching model according to an embodiment is illustrated.

[0044] Fig.17 An example of a method performed by an apparatus for coupling a fiducial marker to a guidance template model according to an embodiment is illustrated. DETAILED DESCRIPTION

[0045] Although the terms used herein are selected from those currently as broad as possible in consideration of the functions in the present disclosure, these terms are subject to change according to the intention of those skilled in the art, precedents, or the introduction of new technologies, etc. In addition, in some cases, some terms may be arbitrarily selected by the applicant, in which case the corresponding meanings will be defined in detail in the corresponding parts of the specification. Therefore, the terms used herein should be defined based on their meanings and the overall content of the present disclosure, rather than simply based on the names of these terms.

[0046] Throughout the specification, it should be understood that when a component "includes (or includes)" an element, unless there is another description to the contrary, it should be understood that the component does not exclude another element, but may also include another element. In addition, the term "unit (or part)" used in the specification refers to a unit for processing at least one function or operation, and it can be formed in the form of hardware, software, or a combination of hardware and software.

[0047] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings so that those skilled in the art can easily practice the embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein.

[0048] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0049] Figure 1 is a block diagram illustrating an example of a configuration of the apparatus 100 according to an embodiment.

[0050] Reference Figure 1 , the device 100 may include a processor 110, a sending unit, a receiving unit, a display, etc.

[0051] The processor 110 may obtain the first intraoral data based on imaging or scanning the oral cavity. In one embodiment, the intraoral data may refer to CT data, scan data, etc. related to the oral cavity. In addition, the processor 110 may obtain a guide wearing simulation model that simulates the state of the guide template model obtained based on the first intraoral data obtained when it is worn in the oral cavity. In one embodiment, the term "model" may refer to virtual data rather than a physical object. For example, a guide template model is obtained based on the patient's first intraoral data for patient customization, and the guide template model may refer to a three-dimensional (3D) model data for determining a guide template corresponding to the guide template model. Therefore, the processor 110 may use the guide template model to simulate the state of the guide template when it is worn in the oral cavity by 3D modeling or similar methods. In addition, the processor 110 may obtain the second intraoral data based on imaging or scanning of the guide template corresponding to the guide template model when it is worn in the oral cavity. In one embodiment, the guide template may refer to an actual physical object corresponding to the guide template model. For example, the guide template model may be used to output the guide template. Therefore, the processor 110 can obtain CT data, scanning data, etc. for the oral cavity when the obtained guide template is worn as the second intraoral data. In addition, based on the second intraoral data, the processor 110 can obtain a reference marker wearing scanning model indicating the state of the guide template being worn in the oral cavity. For example, the first intraoral data may refer to data obtained by imaging or scanning of the oral cavity, and the second intraoral data refers to data obtained by scanning when the guide template is worn on the oral cavity. In addition, the guide wearing simulation model may include a 3D model that simulates the state of the guide template model as virtual data when it is worn in the oral cavity, and the reference marker wearing scanning model may include a 3D model representing the state of the actual guide template being worn in the oral cavity.

[0052] In one embodiment, a fiducial marker may refer to a component that can be attached as an element to a guide template to confirm the fit of an intended implant placement position within the oral cavity. For example, in order to confirm the fit of the guide template to the intended implant placement position, one or more fiducial markers may be attached to the guide template model as a virtual model or as a physical marker to the guide template. The fiducial markers described herein may include both virtual model markers and physical markers attached to the actual guide template.

[0053] In one embodiment, the guide wearing simulation model is a model obtained by simulating the state of the guide template model applied to intraoral data based on the intraoral data acquired by imaging or scanning the oral cavity, and the reference marker wearing scanning model is obtained by imaging or scanning the oral cavity after the guide template and the reference marker are applied to the oral cavity.

[0054] The processor 110 can provide expected error information about the position of the implant model by using a first fiducial marker model attached to the guide wearing simulation model and a second fiducial marker model corresponding to the fiducial marker wearing scanning model. Since the fiducial marker wearing scanning model is a 3D model acquired by performing a scan when the fiducial marker is attached to the guide template worn in the oral cavity, it may be difficult to observe the entire shape of the fiducial marker. The second fiducial marker model may refer to a model including the shape of the fiducial marker not shown in the fiducial marker wearing scanning model. However, the processor 110 can align the fiducial marker as a virtual model with the second fiducial marker model so that the entire shape of the fiducial marker is displayed in the fiducial marker wearing scanning model.

[0055] For example, processor 110 can provide the expected error information about the position of the implant model obtained using the first fiducial marker model and the second fiducial marker model to the user terminal. Any operation of device 100 receiving information from the user terminal or providing information to the user terminal can be performed by the communication between device 100 and the user terminal. In addition, in order to provide the expected error information, processor 110 can use the first fiducial marker model and the second fiducial marker model to compare the position of the implant model. A detailed description of the process will be provided below by an embodiment.

[0056] In addition, those skilled in the art should understand that, in addition to Figure 1In addition to those components shown in , other common components may also be included in the device 100. According to one embodiment, the device 100 may also include an algorithm for processing CT image data or 2D / 3D image data, an algorithm for automatically acquiring reference points on the gums, a user interface unit configured to receive user input, a storage unit configured to store the data described throughout the specification, a receiving unit configured to receive data, and a sending unit configured to send data. For example, the receiving unit may include a wired communication device and / or a wireless communication device, which is capable of sending and receiving various types of information by connecting to other devices or components via a network or a signal processing module. In one embodiment, the processor 110 can perform a series of operations to acquire an oral model and a reference marker model based on a guide template model and a guide template and obtain expected error information about the implant position. The processor 110 can be electrically connected to the storage unit, the receiving unit, the sending unit, and other components to control the data flow therein. To this end, the processor 110 can be implemented as a central processing unit (CPU) that controls the overall operation of the device 100. The following will refer to Figures 2 to 16 Various embodiments of a method performed by apparatus 100 for providing expected error information related to implant placement according to one embodiment are described in more detail.

[0057] Figure 2 is a flow chart illustrating a method performed by the apparatus 100 for providing expected error information related to implant placement according to one embodiment.

[0058] Reference Figure 2 In step S210, the device 100 may obtain first intra-oral data based on imaging or scanning the oral cavity. In one embodiment, the device 100 may obtain information from imaging or scanning the oral cavity, and based on this, obtain first intra-oral data including CT data, scan data, etc. for the oral cavity.

[0059] In addition, the processor 110 may use data on the guidance template model 300. For example, the processor 110 may use the guidance template model 300 to perform a simulation. Figure 3 To understand the guidance template model 300, and the specific implementation of the simulation can refer to step S220.

[0060] Figure 3 The figure illustrates the relative positions of the guide template model 300 and the implant to be placed according to one embodiment. Figure 3 As shown in , the implant can be placed along the implant axis 310 at each bore hole 320 located on the obtained guide template model 300. In the following, the description is based on two implants to be placed, such as Figure 3The same applies when one or more than three implants are placed.

[0061] In step S220, the apparatus 100 may obtain a guide wearing simulation model that simulates the state in which the guide template model 300 obtained based on the first intraoral data is applied to the intraoral data. In one embodiment, the guide template model 300 may refer to virtual data and may be implemented via 3D modeling or a similar method. For example, Figure 5 Let's explain step S220.

[0062] Figure 5 An example is illustrated in which the device 100 according to an embodiment uses the guide wear simulation model 500 to provide information about the implant position, which is determined based on the reference marker 410 connected to the guide template model 300.

[0063] In one embodiment, the guidance template model 300 and the guidance wearing simulation model 500 may include 3D model data, such as Figure 5 As shown in . The device 100 can obtain a guide template model 300, which is designed to cooperate based on the tooth position information included in the first intra-oral data and the gum position information of the implant required. Therefore, the device 100 can also obtain a guide wearing simulation model 500 indicating the state in which the obtained guide template model 300 is worn in the oral cavity.

[0064] In step S230, the device 100 may obtain second intra-oral data based on imaging or scanning performed when the guide template corresponding to the guide template model 300 is worn in the oral cavity. In one embodiment, the guide template may refer to a physical object corresponding to the virtual guide template model 300. The device 100 may acquire information based on imaging or scanning of the oral cavity with the guide template in place, and based on this, obtain second intra-oral data including CT data, scan data, etc. for the oral cavity when the guide template is worn.

[0065] In one embodiment, the guide template can be generated based on the guide template model 300 and can be used to connect one or more reference markers 410. For example, the device 100 can first acquire the guide template model 300 as virtual data based on the first intraoral data initially obtained to generate a physical guide template for the oral cavity. Therefore, the device 100 can obtain a physical guide template generated to have the same shape as the acquired guide template model 300 by using a 3D printer or a milling machine, and the device 100 can acquire imaging or scanning information for the oral cavity as the second intraoral data when the guide template is worn.

[0066] For example, the processor 110 may obtain a guide template using the guide template model 300. The processor 110 may perform a simulation when the guide template is worn in the patient's mouth.

[0067] In addition, the processor 110 can perform a scan of the patient's oral cavity while the guide template is worn. Figure 4 Describe the process.

[0068] Figure 4 An example of performing an intraoral scan using a guide template 400 and fiducial markers 410 coupled in a patient's oral cavity according to an embodiment is illustrated. Figure 4 In one embodiment, an intraoral scanner 420 may be used to image or scan the oral cavity, wherein a guide template 400 coupled with a reference marker 410 is worn in the oral cavity, and the device 100 may obtain information based on the imaging or scanning.

[0069] In one embodiment, to confirm the fit of the implant placement location in the mouth, one or more fiducial markers 410 may be coupled to the guide template 400. The device 100 may confirm the fit of the implant placement location in the mouth by checking or comparing the position of one or more fiducial markers 410 coupled to the guide template 400.

[0070] In step S240, the apparatus 100 may obtain a reference mark wearing scan model indicating a state in which the guide template 400 is worn in the oral cavity based on the second intraoral data. The apparatus 100 may obtain an image indicating a state in which the guide template 400 is worn in the oral cavity as a reference mark wearing scan model. Figure 6 Step S240 is described.

[0071] Figure 6 An example is illustrated of the apparatus 100 using a fiducial marker wear scanning model 600 to provide information about an implant location determined based on a fiducial marker 410 coupled to a guide template 400 according to one embodiment.

[0072] In one embodiment, the guide template 400 and the fiducial marker wearing scan model 600 may include actual patient intraoral scan data as a 3D model, such as Figure 6 Therefore, the device 100 can additionally obtain a reference marker wearing scan model 600 indicating a state in which the obtained guide template 400 is worn in the oral cavity.

[0073] In step S250, the apparatus 100 may provide expected error information about the position of the implant model by using a first fiducial marker model coupled to the guide wear simulation model 500 and a second fiducial marker model corresponding to the fiducial marker wear scanning model 600. Figure 7 Step S250 is described.

[0074] Figure 7 The figure shows the alignment of the guide wearing simulation model 500 and the fiducial marker wearing scanning model 600 based on the fiducial marker model. Figure 7 In the figure, the guide wearing simulation model 500 is shown with dotted lines, and the reference marker wearing scanning model 600 is shown with solid lines.

[0075] When the first fiducial marker model connected to the guide wearing simulation model 500 and the second fiducial marker model connected to the fiducial marker wearing scanning model 600 are aligned and each fiducial marker 410 is compared with the implant position included in the two fiducial marker models, the expected error of the implant model may not be obtained accurately. This is because the expected position of the implant model is determined based on the position of the fiducial marker model. When the position based on the first fiducial marker model and the second fiducial marker model is aligned, the first expected position of the implant determined by the first fiducial marker model and the second expected position of the implant determined by the second fiducial marker model can become identical.

[0076] For example, the first and second reference marks may be necessary elements for the apparatus 100 to obtain expected error information about the position of the implant model. Figure 7 As described, when the first fiducial marker model and the second fiducial marker model are aligned based on the position of each fiducial marker in the first fiducial marker and the second fiducial marker included in the two fiducial marker models, the first expected position of the implant and the second expected position can become the same. Therefore, the device 100 can obtain a separate gingival reference point 710. The device 100 can use the obtained gingival reference point 710 to obtain expected error information about the first expected position and the second expected position of the implant. The method of using the gingival reference point 710 to obtain the expected error information for the implant model will be described below.

[0077] In one embodiment, the device 100 can obtain expected error information based on a comparison result between a first expected position of the implant model determined by the position of the first reference marker model and a second expected position of the implant model determined by the position of the second reference marker model. The device 100 can obtain expected error information by comparing the first expected position determined based on the positional relationship between the gingival reference point 710, at least one point within the first reference marker, and at least one point within the second reference marker with the second expected position.

[0078] For example, the device 100 can determine a first expected position based on a first axial direction oriented by the first fiducial marker model and the position of at least one point within the first fiducial marker, and determine a second expected position based on a second axial direction oriented by the second fiducial marker model and the position of at least one reference point within the second fiducial marker. In one embodiment, the first axial direction can correspond to the direction in which the implant axis 310 within the first fiducial marker model is oriented, and the second axial direction can correspond to the direction in which the implant axis 310 within the second fiducial marker is oriented. Therefore, the first expected position of the implant model can be determined as a position along the first axial direction, and the second expected position can be determined as a position along the second axial direction. In one embodiment, at least one reference point within the first CT data and a reference point within the second CT data can be included in each fiducial marker 410 in each fiducial marker model. Reference can be made to Figure 8 Step S250 is described.

[0079] Figure 8 An example of a method of determining at least one reference point within a fiducial marker 410 according to an embodiment is illustrated. Figure 8 and Fig. 9 The guide template 400 shown in FIG. 4 is presented correspondingly, and the relationship between the guide template 400 and the reference mark 410 is illustrated by isolating the reference mark 410 for one guide hole.

[0080] Figure 8 (a) is a side view showing a state where the reference mark 410 is coupled to the guide template 400, and Figure 8 (b) is a bottom view showing a state where the reference mark 410 is coupled to the guide template 400. In one embodiment, referring to Figure 8 (a), the device 100 can automatically obtain a reference marker plane 820 indicating a fastening point between the guide template 400 and the reference marker 410. The device 100 can use the reference marker plane 820 to determine the intended implant position.

[0081] In addition, refer to Figure 8, the device 100 can identify and determine the positions of multiple reference points within the reference mark 410 by using the hexagonal recess 810 of the guide template 400 to which the reference mark 410 is connected. The device 100 can use multiple reference points within the reference mark 410 to determine the intended implant position, and the multiple reference points include a first reference point 840, a second reference point 850, a third reference point 860, and a fourth reference point 870. For example, the device 100 can determine four points as multiple reference points, and the multiple reference points are positioned every 90 degrees relative to points on a straight line aligned with the implant axis 310 and are oriented toward the hexagonal recess 810 of the guide template. The hexagonal recess 810 of the guide template can refer to a groove designed to align with the internal hexagon of the implant. In one embodiment, although in Figure 4 , Figure 5 and Figure 6 The hexagonal recess 810 is not specifically mentioned in the figure, but is schematically shown. Therefore, the plurality of reference points may include each end point of the fiducial marker diameter 830, which does not include the hexagonal recess 810 of the guide template. In one embodiment, the device 100 can determine four reference points by setting a plurality of reference points corresponding to positions on the fiducial marker plane 820 spaced 90 degrees relative to the implant axis 310 and the hexagonal recess 810 of the guide template, such as Figure 8 Thus, each reference point can be positioned 90 degrees apart from each other, as shown in (b). Figure 8 . As shown in (b). For example, the fourth reference point 870 can be positioned 180 degrees from the first reference point 840, and the third reference point 860 can be positioned 180 degrees from the second reference point 850. Therefore, the device 100 can determine a plane corresponding to the determined multiple reference points. In one embodiment, the plane corresponding to the multiple reference points can be a reference mark plane 820. The device 100 can use the reference mark plane 820 to determine a first expected position and a second expected position for an implant. The device 100 can determine the position at a preset distance 520 along the implant axis 310 from the reference mark plane 820 as the highest position 530 of the implant, and the reference mark 410 is connected to the guide template 400 on the reference mark plane 820.

[0082] Fig. 9 The diagram shows an example of a state in which the guide template 400 according to the embodiment is worn in the oral cavity of a patient. Figure 8 As described, the guide template 400 may include a hexagonal recess 810, a drill hole 320 for implant placement, an anchor screw hole 910 for fixing the guide template 400, and an open window 920 for checking template fit.

[0083] In one embodiment, reference Figure 5 and Figure 6 , as referenced Figure 8 As described, the device 100 can obtain a reference marker plane 820 contained in the widest portion 510 of the reference marker. The device 100 can determine a point located at a preset distance 520 along the implant axis 310 from the reference marker plane 820 as the implant highest position 530. In one embodiment, the implant axis 310 can be the same as the axis passing through the center of the reference marker 410. Therefore, the device 100 can determine the expected position of the implant based on the determined implant highest position 530. In one embodiment, the preset distance 520 can refer to a value representing a preset length for determining the implant placement position based on the position of the reference marker 410, and can be, for example, a value of 10.5 mm. In one embodiment, the preset distance 520 can be flexibly adjusted according to the situation, and can be preset or modified by an administrator or user. Using reference Figure 5 , Figure 6 and Figure 8 With the described method, the apparatus 100 may determine a first expected position and a second expected position for the implant position corresponding to the first fiducial marker model and the second fiducial marker model.

[0084] In one embodiment, the device 100 can obtain a first gingival reference point for the guide wearing simulation model 500 and a second gingival reference point for the reference marker wearing scanning model 600. In addition, the device 100 can obtain an intraoral matching model in which the guide wearing simulation model 500 and the reference marker wearing scanning model 600 are matched relative to the first gingival reference point and the second gingival reference point corresponding to the first gingival reference point. Based on the intraoral matching model, the device can overlay and display the implant model of the first expected position and the implant model of the second expected position. In one embodiment, the first gingival reference point or the second gingival reference point can be determined by the device 100. For example, the device 100 can set a point within the guide wearing simulation model 500 as the first gingival reference point. The first gingival reference point can be used as a reference point for comparing each expected implant position determined in the guide wearing simulation model 500 and the reference marker wearing scanning model 600. Since the first gingival reference point is a reference point for aligning and comparing the positions of the guide wear simulation model 500 and the reference mark wear scanning model 600, the second gingival reference point corresponding to the first gingival reference point can represent the same position in terms of coordinates. Therefore, they can generally be referred to as gingival reference points 710. When the gingival reference point 710 including both the first gingival reference point and the second gingival reference point is positioned in the guide template model 300 or the guide template 400, the guide wear simulation model 500 and the reference mark wear scanning model 600 can be aligned at the same position, and therefore each implant position may not be compared. Therefore, the gingival reference point 710 should not be positioned in the guide template model 300 or the guide template 400, but can be located on the gums. The device 100 can align the guide wear simulation model 500 and the reference mark wear scanning model 600 relative to the gingival reference point 710, and an intraoral matching model in which the guide wear simulation model 500 matches the reference mark wear scanning model 600 can be obtained. Therefore, the device 100 can compare the position of the implant model at the first expected position and the position of the implant model at the second expected position based on the intraoral matching model, in which the guide wearing simulation model 500 and the reference marker wearing scanning model 600 aligned relative to the gingival reference point 710 are matched. In addition, the device 100 can display an overlay image of the guide wearing simulation model 500 and the reference marker wearing scanning model 600. In one embodiment, although the following example is provided: in this example, the device 100 determines a first gingival reference point, wherein a point corresponding to the first gingival reference point in the reference marker wearing scanning model 600 is determined as a second gingival reference point, and then the device 100 aligns the guide wearing simulation model 500 and the reference marker wearing scanning model 600 relative to the gingival reference point 710 to compare the position of each implant model, the device 100 is not limited to this case.In another example, the device 100 may set a point within the fiducial marker wearing scanning model 600 as the second gingival reference point, and may determine a point within the guide wearing simulation model 500 corresponding to the second gingival reference point as the first gingival reference point.

[0085] In another embodiment, the device 100 may automatically obtain a first gingival reference point for the guide wearing simulation model 500, or may obtain the first gingival reference point based on user input. The device 100 may obtain relative position information indicating the relative position between the first gingival reference point and the first reference marker model, and based on the relative position information, the device 100 may obtain a second gingival reference point corresponding to the first gingival reference point on the reference marker wearing scanning model 600. Based on the distance between the first gingival reference point and the first reference marker model, the second gingival reference point may be obtained at the same distance from the second reference marker model, and the positions of the first gingival reference point and the second gingival reference point may represent the same three-dimensional position in coordinates. In addition, the device 100 may obtain an intraoral matching model that matches the guide wearing simulation model 500 and the reference marker wearing scanning model 600 by aligning the first gingival reference point and the second gingival reference point, and may obtain expected error information based on the intraoral matching model. The device 100 can automatically determine a point within the image of the guide wearing simulation model 500 or the reference marker wearing scanning model as the position of the first gingival reference point or the second gingival reference point based on a preset algorithm. For example, the device 100 can obtain the first gingival reference point or the second gingival reference point at a position more than a preset distance away from the reference marker 410. Because the position of each reference marker 410 connected to the guide template model 300 and the guide template 400 is specified, the device can determine a point more than a preset distance away from the reference marker 410 as the three-dimensional position of the first gingival reference point or the second gingival reference point based on the shape of the guide template model 300 and the guide template 400 and the position of each reference marker 410. This allows the first gingival reference point or the second gingival reference point to be obtained at a position outside the guide template model 300 or the guide template 400. In addition, the device 100 may provide the images of the guide wearing simulation model 500 and the reference marker wearing scanning model 600 to the user terminal, and may receive a point input from the user within the image of the guide wearing simulation model 500 or the reference marker wearing scanning model 600 as a first gingival reference point or a second gingival reference point. In one embodiment, the user input may be applied to an area other than the guide template model 300 of the entire guide wearing simulation model 500. For example, the device 100 may provide the user terminal with a graphical UI that allows the user to select the position of the first gingival reference point on the gums within the guide template model 300. For example, the device 100 may provide the user terminal with a graphical UI that is set to not be clicked at a position within the image of the guide template model 300 or the guide template 400. Therefore, the user can select a point within the area other than the guide template model 300 or the guide template 400 of the entire guide wearing simulation model 500 as the first gingival reference point or the second gingival reference point, and may input the selected point.In one embodiment, the relative position information may include distance information between a plurality of first reference points on the first reference marker model and the first gingival reference point. For example, the device 100 may measure the distance between each of the first reference point 840, the second reference point 850, the third reference point 860, and the fourth reference point 870 determined from the reference marker 410 within the guide wear simulation model 500 and the first gingival reference point. In one embodiment, the distance information may include length, axial direction, etc.

[0086] Fig.10 An example of a method for determining a second gingival reference point by using distance information of a first gingival reference point and a fiducial marker 410 , performed by the apparatus 100 , according to an embodiment is illustrated.

[0087] Reference Fig.10 In the left figure in FIG. 1 , the device 100 can obtain distance information by measuring the distance between multiple reference points in each reference mark 410 and the determined first gingival reference point along each axial direction (angle) in the guide wearing simulation model 500. In addition, referring to Fig.10In the right figure of the intraoral scan data image shown in FIG, the device 100 can determine the three-dimensional position of the second gingival reference point in the reference wear scan model 600 based on the obtained distance information. For example, based on the distance (length) between the multiple reference points in each reference mark 410 and the gingival reference point 710 along each axial direction (angle) included in the distance information obtained using the guide wear simulation model 500, the three-dimensional position at the same distance away from the multiple reference points in each reference mark of the reference mark wear scan model 600 can be determined as the second gingival reference point. In one embodiment, the position of the first gingival reference point and the position of the second gingival reference point can be the same position in coordinates, so that when they are superimposed, they are used as reference points for aligning the guide wear simulation model 500 and the reference mark wear scan model 600, and can refer to the gingival reference point 710. Therefore, the device 100 can obtain the relative position information between the first gingival reference point and the multiple reference points in the reference mark 410 of the first reference mark model, and determine the position of the corresponding second gingival reference point in the reference mark wear scan model 600. In addition, in one embodiment, the following example has been described: in this example, the device 100 determines the position of the second gingival reference point in the reference marker wearing scanning model 600 by using the distance information between the first gingival reference point in the guide wearing simulation model 500 and the multiple reference points of the reference marker 410, but the example is not limited to this, and in another example, the device 100 may also determine the position of the first gingival reference point in the guide wearing simulation model 500 by using the distance information between the second gingival reference point in the reference marker wearing scanning model 600 and the multiple reference points of the reference marker 410. In addition, the device 100 may display the guide wearing simulation model 500 and the reference marker wearing scanning model 600 in the following state: in this state, the guide template model 300 and the guide template 400 aligned by the gingival reference point 710 based on the positions of the reference marker 410 and the gingival reference point 710 are worn in the oral cavity.

[0088] Fig.11 An example of a method for obtaining a first graphic and a second graphic performed by the apparatus 100 according to an embodiment is illustrated.

[0089] Reference Fig.11 , as referenced Figure 5 As described, the implant highest position 530 may be determined as a position along the implant axis 310 at a preset distance 520 away from a reference marker plane 820 that represents a fastening point between the guide template model 300 and each reference marker 410 coupled to the guide template 400 . Fig.11The implant highest position 530 in the guide wearing simulation model 500 shown in the left figure in FIG. 1 can indicate the first implant highest point 1130 located at a preset distance 520 from the reference mark 410 of the guide wearing simulation model 500 along the implant axis 310, and Fig.11 The highest position 530 of the implant in the reference marker wearing scanning model 600 in the right figure can indicate the second implant highest point 1140 located at a preset distance 520 from the reference marker 410 of the reference marker wearing scanning model 600 along the implant axis 310. In addition, the device 100 can determine one of the first reference point 840, the second reference point 850, the third reference point 860 and the fourth reference point 870 as a specific reference point, and the first reference point 840, the second reference point 850, the third reference point 860 and the fourth reference point 870 are multiple reference points within each reference marker 410 in the guide wearing simulation model 500 and the reference marker wearing scanning model 600. The specific reference point may refer to a point used to obtain expected error information about the implant position based on the positional relationship between the highest point of each implant and the gingival reference point 710. Reference Fig.11 , the device 100 may determine one of the multiple reference points within the fiducial marker 410 of the guide wearing simulation model 500 as the first specific reference point 1110, and may determine one of the multiple reference points within the fiducial marker 410 of the fiducial marker wearing scanning model 600 as the second specific reference point 1120. Since the first specific reference point 1110 and the second specific reference point 1120 are reference points for obtaining expected error information about the implant position according to the position, the positions of the first specific reference point 1110 and the second specific reference point 1120 may be the same position within each fiducial marker 410. In one embodiment, as Fig.11 As shown in , the device 100 can obtain a first figure including two triangles, each of which is formed by connecting a first implant apex 1130 located at a preset distance 520 from the reference mark plane 820 along the implant axis 310 generated based on the first axial direction, a first specific reference point 1110 in the corresponding reference mark 410, and a gingival reference point 710. In addition, the device 100 can obtain a second figure including two triangles, each of which is formed by connecting a second implant apex 1140 located at a preset distance 520 from the reference mark plane 820 along the implant axis 310 generated based on the second axial direction, a second specific reference point 1120 in the corresponding reference mark 410, and a gingival reference point 710. In one embodiment, the device 100 can match the obtained first and second figures and compare the positions of the reference points. Reference can be made to Fig.12 and Fig.13 Describe the process. Fig.12 and Fig.13 In order to check the expected error regarding the implant position by matching the guide wearing simulation model 500 and the reference marker wearing scanning model 600, a first figure corresponding to the guide template model 300 and the guide wearing simulation model 500 can be represented by a dotted line, and a second figure corresponding to the guide template 400 and the reference marker wearing scanning model 600 can be represented by a solid line.

[0090] Fig.12 An example of a case where there is no fitting error in the intra-oral matching model according to the embodiment is illustrated.

[0091] Reference Fig.12 As shown at the top of (a), when the first figure and the second figure are matched, it can be seen that the positions of all reference points are the same as shown on the far right in (a), so that the figures are completely aligned without error. In addition, referring to (b) shown at the bottom, in the case of the oral matching model when matching to overlap based on the gingival reference point 710, it can be seen that the guide template model 300 and the guide template 400 are completely aligned, and therefore there is no matching error.

[0092] Fig.13 An example of a case where a fitting error occurs in the intra-oral matching model according to an embodiment is illustrated.

[0093] Reference Fig.13 (a) shown at the top of, when the first graphic and the second graphic are matched, it can be seen that the positions of all reference points except the gingival reference point 710 are different, as shown in the figure on the upper right side. In addition, referring to (b) shown at the bottom, in the case of the oral matching model, it can be seen that the guide template model 300 and the guide template 400 are not completely matched when matched to overlap based on the gingival reference point 710 and a matching error occurs. Therefore, the device 100 can match the first and second graphics formed by connecting the gingival reference point 710 and the specific reference point to compare the position of each reference point, and a comparison result of the first expected position and the second expected position for the implant model can be obtained, thereby obtaining expected error information about the implant position. In addition, the device 100 can additionally provide a graphical UI for providing a comparison result of the guide wearing simulation model 500 and the reference marker wearing scanning model 600 or the first expected position and the second expected position.

[0094] Fig.14 An example of a display matching screen according to an embodiment is illustrated, which shows the oral cavity of a patient to which the guide template model 300 and the guide template 400 are fixed. Fig.14As shown in , the device 100 can also visually provide a position comparison result between the guide wearing simulation model 500 and the reference marker wearing scanning model 600, and can match each image of the guide template model 300 and the guide template 400 when worn in the oral cavity with the oral cavity and display the matching image. Fig.14 , "Bucco-Lingual" represents a bucco-lingual view and provides an image as seen from the bucco-lingual side (the side of the tooth), and "Mesio-Distal" represents a mesio-occlusal plane and provides an image as seen from the front. In addition, "Top" provides an image seen from above, and "Bottom" provides an image seen from below, which may be an image obtained by rotating the top image 180 degrees in the left or right direction. In addition, the rectangular entity at the lower right of each image is a component for identifying the direction of the image. Specifically, the rectangular entity at the lower right of each image indicates the direction information of the current screen being displayed in three dimensions, which is displayed as B (buccal), L (lingual), A (front), P (back), H (top), or F (bottom).

[0095] Therefore, the apparatus 100 can provide the user with a visual 3D shape image as an image of the oral cavity of the patient to which the guide template model 300 and the guide template 400 are fixed.

[0096] Fig.15 An example of a graphical UI providing a screen showing an implant image according to a first expected position and a second expected position match according to an embodiment is illustrated. Fig.15 As shown in , the device 100 can also provide a graphical UI for visually providing a comparison result of the first expected position and the second expected position of the implant position, and can display and provide an image matching the first expected position and the second expected position of each implant position in the guide template model 300 and the guide template 400. Fig.15 In FIG. 1 , the first expected position is shown with a dotted line and the second expected position is shown with a solid line.

[0097] In one embodiment, the device 100 can obtain an intraoral matching model by updating the viewpoint of the first intraoral data or the viewpoint of the second intraoral data in a state where the first gingival reference point and the second gingival reference point are aligned. The viewpoint of the first intraoral data may include the first specific reference point 1110 of the guide wearing simulation model 500, the highest point 1130 of the first implant, and the gingival reference point 710, and the viewpoint of the second intraoral data may include the second specific reference point 1120 of the reference marker wearing scanning model 600, the second implant top position point 1140, and the gingival reference point 710. This can be referred to Fig.16 Describe it. Fig.16, the first graphic and the guide wearing simulation model 500 are represented by dotted lines, and the second graphic and the reference marker wearing scanning model 600 are represented by solid lines.

[0098] Fig.16 An example of a method performed by a device for updating each reference point to eliminate a fitting error in an intra-oral matching model according to an embodiment is illustrated.

[0099] Reference Fig.16 , since the first figure and the second figure have the same shape and size, but the position of each reference point in terms of vector (X, Y, Z) is different, which causes a matching error, so when a matching error occurs due to comparing the first expected position with the second expected position, the device 100 can align the position of one of the multiple reference points in the first shape and the second shape, and then rotate or move them relative to each of the X-axis, Y-axis, Z-axis and the origin to ensure matching. Fig.16 In (a), the position of the first graphic may be updated along a first update direction 1610 corresponding to the guide wearing simulation model 500. In addition, the position of the second graphic may be updated along a second update direction 1620 corresponding to the reference marker wearing scanning model 600. The first update direction 1610 and the second update direction 1620 are updated in Fig.16 (a) is illustrated as a downward direction, but is not limited thereto, and the update direction may vary according to the moving direction and angle that make the error rate of the positions of the first and second graphics 0%. Therefore, the device 100 may update Fig.16 The position of the viewpoint of the first intraoral data and the position of the viewpoint of the second intraoral data in the intraoral matching model illustrated in (b) allow the matching error rate of the first figure and the second figure to be 0%. Therefore, the device 100 can improve the accuracy of determining the implant placement position by updating and correcting each viewpoint position when a matching error occurs.

[0100] Fig.17 An example of a method performed by the apparatus 100 for coupling a fiducial marker 410 to the guidance template model 300 according to an embodiment is illustrated.

[0101] Reference Fig.17 , the fiducial marker 410 can be coupled to the guide template model 300 so that the implant axis 310 passing through the center of the fiducial marker 410 is aligned with the implant axis 310 at the location of each bore hole 320 in the guide template model 300, and the widest portion 510 of the fiducial marker 410 is aligned with the implant axis 310 at the location of each bore hole 320 in the guide template model 300. Fig.17 The partial alignment of the guide template model 300 is shown as 510.

[0102] According to one embodiment of the present disclosure, the device 100 uses the fiducial marker 410 to determine the implant placement position, and determines the expected position of the three-dimensional virtual implant only based on the specific shape and position of the fiducial marker 410, which is advantageous and effective. In addition, the device 100 provides expected surgical error information by comparing the position of the three-dimensional virtual implant for which the surgery is planned using the fiducial marker 410 with the position of the three-dimensional virtual implant regarding the position of the guide coupled in the patient's oral cavity, thereby improving efficiency because the user can use this information to correct the coupling of the guide or redesign the guide.

[0103] In addition, the device 100 provides the expected error information about the implant placement position to the user account, and the correction and generation of the guide can be performed based on this information. This allows the implant placement position to be determined at a more appropriate position in the patient's mouth, which can improve user and patient satisfaction.

[0104] Furthermore, because the oral cavity is scanned using an intraoral scanner rather than by having fiducial markers 410 attached and performing a CT scan, there is no additional radiation exposure.

[0105] It should be understood that the order and combination of the steps shown above are only embodiments of the present disclosure, and without departing from the basic characteristics of each component described in this specification, the order, combination, branch, function and execution subject may be changed to be implemented by additional, fewer or different steps. Throughout this specification, the term "provide" or "providing" may be interpreted as: comprehensively including the process of an object obtaining specific information or directly or indirectly sending specific information to a specific object or receiving specific information from a specific object, and including the execution of the relevant operations required in the process.

[0106] The various embodiments described herein may be implemented as software, including one or more instructions stored in a storage medium (e.g., a memory) that can be read by a machine (e.g., a display device or a computer). For example, a processor of a machine (e.g., processor 120) may call at least one of the one or more instructions stored in a storage medium and execute the instruction. This enables the machine to be operated to perform at least one function according to at least one instruction called. One or more instructions may include code generated by a compiler or code executable by an interpreter. A machine-readable storage medium may be provided in the form of a non-transitory storage medium. Among them, the term "non-transitory" only means that the storage medium is a tangible device and does not include a signal (e.g., an electromagnetic wave), but the term does not distinguish between a situation where data is semi-permanently stored in a storage medium and a situation where data is temporarily stored in a storage medium.

[0107] According to an embodiment, the method according to various embodiments of the present disclosure may be included in and provided in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., a compact disc read-only memory (CD-ROM)), or via an application store (e.g., PlayStore). TM ) online distribution (e.g., downloaded or uploaded) or directly distributed between two user devices (e.g., smartphones). If distributed online, at least a portion of the computer program product may be temporarily generated or at least temporarily stored in a machine-readable storage medium, such as a manufacturer's server, an application store's server, or a relay server.

[0108] It will be appreciated by those skilled in the art that various changes in form and detail may be made without departing from the above-mentioned features. The disclosed method should be considered to be in a descriptive sense only, and not for the purpose of limitation. The scope of the present invention is not limited by the detailed description of the present invention, but by the appended claims, and encompasses all modifications and equivalents that fall within the scope of the appended claims and will be interpreted as included in the present invention.

Claims

1. A method for providing expected error information related to implant placement performed by an apparatus, the method comprising the steps of: Acquiring first intraoral data based on imaging or scanning the oral cavity; Obtaining a guide wearing simulation model for simulating a state in which a guide template model obtained based on the first intraoral data is applied to intraoral data; obtaining second intra-oral data based on imaging or scanning performed when a guide template corresponding to the guide template model is worn on the oral cavity; obtaining a reference marker wearing scan model indicating a state in which the guide template is worn on the oral cavity based on the second intraoral data; as well as A first fiducial marker model coupled to the guide wear simulation model using fiducial markers and a second fiducial marker model corresponding to the fiducial marker wear scan model provide expected error information about the position of the implant model.

2. The method according to claim 1, wherein: The guidance template is generated based on the guidance template model and is used to connect one or more reference markers.

3. The method according to claim 1, wherein: The step of providing the expected error information includes the step of obtaining the expected error information based on a comparison result between a first expected position of the implant model determined by the position of the first reference marker model and a second expected position of the implant model determined by the position of the second reference marker model.

4. The method according to claim 3, wherein: The step of providing the expected error information comprises the following steps: determining the first expected position based on a first axial direction oriented by the first fiducial marker model and positions of a plurality of first reference points on the first fiducial marker; determining the second expected position based on a second axial direction oriented by the second fiducial marker model and positions of a plurality of second reference points on the second fiducial marker; and The expected error information is obtained based on the comparison result between the first expected position and the second expected position.

5. The method according to claim 3, wherein: The step of providing the expected error information comprises the following steps: Obtaining a first gingival reference point for the guide wearing simulation model; obtaining a second gingival reference point for the fiducial marker wearing scan model; obtaining an intra-oral matching model in which the guide wearing simulation model and the reference marker wearing scanning model are matched with respect to the first gingival reference point and the second gingival reference point corresponding to the first gingival reference point; and The implant model of the first expected position and the implant model of the second expected position are superimposed and displayed based on the intraoral matching model.

6. The method according to claim 1, wherein: The step of providing the expected error information comprises the following steps: automatically or based on user input, obtaining a first gingival reference point for the guide wear simulation model; obtaining relative position information indicating a relative positional relationship between the first gingival reference point and the first fiducial marker model; Obtaining a second gingival reference point corresponding to the first gingival reference point on the reference marker wearing scan model based on the relative position information; obtaining an intra-oral matching model in which the guide wearing simulation model and the reference marker wearing scanning model are matched by aligning the first gingival reference point and the second gingival reference point; and The expected error information is obtained based on the intra-oral matching model.

7. The method according to claim 6, wherein: The position of the automatically obtained gingival reference point is generated on the area of ​​the entire guide wearing simulation model that does not include the guide template model or on the area of ​​the entire reference marker wearing scanning model that does not include the guide template, and the user input is applied to the area of ​​the entire guide wearing simulation model that does not include the guide template model or the area of ​​the entire reference marker wearing scanning model that does not include the guide template model.

8. The method according to claim 6, wherein: The relative position information includes distance information between a plurality of first reference points on the first reference marker model and the first gingival reference point or distance information between a plurality of second reference points on the second reference marker model and the second gingival reference point.

9. The method according to claim 6, wherein: The step of obtaining the intra-oral matching model includes obtaining the intra-oral matching model by updating the viewpoint of the first intra-oral data or the viewpoint of the second intra-oral data in a state where the first gingival reference point and the second gingival reference point are aligned.

10. An apparatus for providing expected error information related to implant placement, the apparatus comprising: A processor, the processor being configured to: Acquiring first intraoral data based on imaging or scanning the oral cavity; Obtaining a guide wearing simulation model for simulating a state in which a guide template model obtained based on the first intraoral data is applied to intraoral data; obtaining second intra-oral data based on imaging or scanning performed when a guide template corresponding to the guide template model is worn on the oral cavity; Obtaining a reference marker wearing scan model indicating a state in which the guide template is worn on the oral cavity based on the second intraoral data; and Expected error information about the position of the implant model is provided by using a first fiducial marker model coupled to the guide wear simulation model and a second fiducial marker model coupled to the fiducial marker wear scan model.

11. The device according to claim 10, wherein: The guidance template is generated based on the guidance template model and is used to connect one or more reference markers.

12. The device according to claim 10, wherein: The processor is configured to obtain the expected error information based on a comparison result between a first expected position of the implant model determined by the position of the first reference marker model and a second expected position of the implant model determined by the position of the second reference marker model.

13. The device according to claim 12, wherein: The processor is configured to: determining the first expected position based on a first axial direction oriented by the first fiducial marker model and positions of a plurality of first reference points on the first fiducial marker; determining the second expected position based on a second axial direction oriented by the second fiducial marker model and positions of a plurality of second reference points on the first fiducial marker; and The expected error information is obtained based on the comparison result between the first expected position and the second expected position.

14. The device according to claim 10, wherein: The processor is configured to: automatically or based on user input, obtaining a first gingival reference point for the guide wear simulation model; obtaining relative position information indicating a relative positional relationship between the first gingival reference point and the first fiducial marker model; Obtaining a second gingival reference point corresponding to the first gingival reference point on the reference marker wearing scan model based on the relative position information; obtaining an intra-oral matching model in which the guide wearing simulation model and the reference marker wearing scanning model are matched by aligning the first gingival reference point and the second gingival reference point; and The expected error information is obtained based on the intra-oral matching model. 15 . A computer-readable non-transitory recording medium having a program stored thereon, the program causing a computer system to implement the method according to claim 1 when the program is executed by the computer system.

Images