Method for generating tooth model, tooth model printing method and equipment

Abstract

The embodiment of the invention is suitable for the technical field of dentistry and 3D printing, and provides a method for generating a tooth model and a tooth model printing method and device.The method for generating the tooth model comprises the steps that an oral cavity scanning model is obtained, and the oral cavity scanning model comprises a scanning rod model; determining a joint device model matched with the scanning rod model; the scan rod model is removed from the oral scan model and the engagement device model is added based on a location match to the scan rod model to generate a tooth model. By applying the method, the oral cavity data of the patient can be obtained in a digital mode, then the tooth model is generated according to the matched joint device model, and accurate model taking is achieved. On the basis, the 3D printing technology can be adopted for printing to obtain the corresponding entity tooth, errors caused by manual assembly are reduced, and the precision of the entity tooth obtained through printing is guaranteed.

Description

Technical Field

[0001] The embodiments of the present application belong to the fields of dental technology and 3D printing technology, and particularly relate to a method for generating a dental model, a method and device for printing a dental model. Background Art

[0002] Currently, in order to implement dental implantation, a plaster model is usually used as a dental mold, and then substitutes of different specifications or types are embedded in the alveolar bone, and finally a prosthetic crown is fixed on the substitute. In this process, it is necessary to take a mold to determine the patient's oral condition and then make a corresponding dental mold.

[0003] In the prior art, taking a mold in a patient's oral cavity usually uses silicone rubber and is manually completed by a doctor. On this basis, a dental mold is made by pouring plaster. In the process of making the dental mold, it is also necessary to make a substitute and assemble the substitute on the made dental mold by manual assembly. Due to the use of manual assembly, there is an easy deviation between the substitute and the dental mold, which further leads to an inaccurate corresponding positional relationship between the subsequent installation of the abutment and the crown on the substitute, affecting the final dental implantation effect. Summary of the Invention

[0004] In view of this, the embodiments of the present application provide a method for generating a dental model, a method and device for printing a dental model, which are used to obtain patient oral data in a digital manner, and then generate a dental model according to a matching joint device model, so as to achieve accurate mold taking. On this basis, the embodiments of the present application can use 3D printing technology to print the corresponding dental model, reduce the error caused by manual assembly, and ensure the accuracy of the printed dental model.

[0005] The first aspect of the embodiments of the present application provides a method for generating a dental model, including:

[0006] Obtaining an oral scan model, where the oral scan model includes a scan rod model;

[0007] Determining a joint device model that matches the scan rod model;

[0008] Removing the scan rod model from the oral scan model and adding the joint device model based on the position matching with the scan rod model to generate a dental model.

[0009] The second aspect of the embodiments of the present application provides a method for printing a dental model, including:

[0010] Obtaining a dental model available for 3D printing;

[0011] Performing 3D printing based on the dental model to obtain a solid tooth;

[0012] Among them, the tooth model is generated by the method described in the first aspect above.

[0013] The third aspect of the embodiments of the present application provides a device for generating a tooth model, including:

[0014] An acquisition module, configured to acquire an oral scan model, where the oral scan model includes a scan rod model;

[0015] A determination module, configured to determine a joint device model that matches the scan rod model;

[0016] A generation module, configured to remove the scan rod model from the oral scan model and add the joint device model based on the position matching with the scan rod model to generate a tooth model.

[0017] The fourth aspect of the embodiments of the present application provides a tooth model printing device, including:

[0018] An acquisition module, configured to acquire a tooth model available for 3D printing;

[0019] A printing module, configured to perform 3D printing based on the tooth model to obtain a physical tooth;

[0020] Among them, the tooth model is generated by calling the device described in the third aspect above.

[0021] The fifth aspect of the embodiments of the present application provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the computer device implements the method described in the first aspect above.

[0022] The sixth aspect of the embodiments of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a computer, the method described in the first aspect or the second aspect above is implemented.

[0023] The seventh aspect of the embodiments of the present application provides a computer program product, including a computer program. When the computer program runs, the method described in the first aspect or the second aspect above is executed.

[0024] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0025] In the embodiments of the present application, by obtaining an oral scan model, a computer device can determine a joint device model that matches the scan rod model included in the oral scan model. Then, after removing the scan rod model from the oral scan model, based on the position matching relationship between the joint device model and the scan rod model, the above joint device model is added to the oral scan model to generate a tooth model. In this way, patient oral data can be obtained digitally, and then a tooth model suitable for 3D printing can be generated according to the matching joint device model, realizing accurate impression taking in the patient's oral cavity. On this basis, the embodiments of the present application can use 3D printing technology to print the corresponding physical teeth, reducing the errors caused by manual assembly and ensuring the accuracy of the printed physical teeth. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the following-described drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic diagram of a method for generating a tooth model provided by an embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the installation of a scan rod provided by an embodiment of the present application;

[0029] Figure 3 It is a schematic diagram of a tooth model provided by an embodiment of the present application;

[0030] Figure 4 It is a schematic diagram of another method for generating a tooth model provided by an embodiment of the present application;

[0031] Figure 5 It is a schematic diagram of an area to be removed provided by an embodiment of the present application;

[0032] Figure 6 It is a schematic diagram of adjusting the inner wall of a substitute model provided by an embodiment of the present application;

[0033] Figure 7 It is a schematic diagram of a substitute-free protection area provided by an embodiment of the present application;

[0034] Figure 8 It is a schematic diagram of a substitute protection area provided by an embodiment of the present application;

[0035] Figure 9 It is a schematic diagram of a gingival cutting plane provided by an embodiment of the present application;

[0036] Figure 10 It is a schematic diagram of a bottom-added model provided by an embodiment of the present application;

[0037] Figure 11 It is a schematic diagram of a tooth model with an articulator added provided by an embodiment of the present application;

[0038] Figure 12 It is a schematic diagram of a tooth model printing method provided by an embodiment of the present application;

[0039] Figure 13 It is a schematic diagram of a device for generating a tooth model provided by an embodiment of the present application;

[0040] Figure 14 It is a schematic diagram of a tooth model printing device provided by an embodiment of the present application;

[0041] Figure 15 It is a schematic diagram of a computer device provided by an embodiment of the present application. Detailed implementation manners

[0042] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0043] The technical solutions of the present application will be described below through specific embodiments.

[0044] Refer to Figure 1 , which shows a schematic diagram of a method for generating tooth model data provided by an embodiment of the present application, and specifically may include the following steps:

[0045] S101. Obtain an oral scan model, where the oral scan model includes a scan rod model.

[0046] It should be noted that this method can be applied to a computer device, that is, the execution subject of the embodiment of the present application can be a computer device. By executing the various steps of the method provided by the embodiment of the present application, the computer device can generate a tooth model. For example, the generated tooth model can be a digital dental model that can be used for 3D printing. The type of the computer device is not limited in the embodiment of the present application.

[0047] Unless otherwise specified, the "dental model" or "tooth model" mentioned in the embodiment of the present application can represent the same technical feature, that is, the computer device can generate a tooth model or a dental model by executing this method.

[0048] In an embodiment of the present application, a computer device may first obtain an oral scan model of a patient, and on this basis, generate a tooth model by processing the oral scan model.

[0049] In a possible implementation manner of the embodiment of the present application, the above-mentioned oral scan model may be obtained by using a scanning device such as a CT to scan in the patient's oral cavity to obtain corresponding scan data and generating it based on the scanned data. The scanning device may transmit the oral scan model to the computer device for further processing by the computer device.

[0050] In another possible implementation manner of the embodiment of the present application, the above-mentioned oral scan model may also be obtained by scanning and modeling using other types of digital devices. Exemplarily, an intraoral scanner may be used to scan inside the patient's oral cavity to obtain an oral scan model. The intraoral scanner can continuously take pictures inside the patient's oral cavity to obtain multiple images of various parts inside the patient's oral cavity. By processing these images, the complete oral morphology of the patient can be obtained, and this oral morphology can be represented by the oral scan model.

[0051] In the embodiment of the present application, before using a scanning device such as a CT device or an intraoral scanner to scan in the patient's oral cavity, a scanning rod may be first installed in the patient's oral cavity. The function of this scanning rod is similar to that of the transfer rod used in the traditional impression-taking process and can be installed at the position where dental implants are needed in the patient's oral cavity. As Figure 2 shown, it is a schematic diagram of the installation of a scanning rod provided by the embodiment of the present application. Figure 2 It shows a schematic diagram of a scanning rod 200 installed at a certain tooth position where dental implants are needed. In the actual impression-taking process, the type or specification of the scanning rod to be used can be determined by the doctor according to the actual morphology of the patient's oral cavity or the position where dental implants are needed. The embodiment of the present application does not limit this.

[0052] After installing the scanning rod at the position where dental implants are needed in the patient's oral cavity, the scanning device can be used to scan the patient's oral cavity to obtain an oral scan model. The above-mentioned oral scan model also includes information related to the scanning rod, such as the scanning rod model.

[0053] As an example of the embodiment of the present application, medical technicians can use a scanning device to scan the patient's oral cavity to obtain an oral scan model. The above-mentioned oral scan model can be transmitted to the computer device, and the computer device processes the received oral scan model to generate a final tooth model.

[0054] S102. Determine a joining device model that matches the scanning rod model.

[0055] In an embodiment of the present application, after a computer device obtains or receives an oral scan model of a patient, it can determine a joint device model that matches the scan rod model in the oral scan model. The joint device model can be a model corresponding to a support structure for supporting a abutment and a dental crown during a subsequent dental implant process.

[0056] In a possible implementation manner of the embodiment of the present application, the joint device model can be a substitute model. In the field of dental implant technology, an implant is a biocompatible device implanted to solve problems such as a decline in chewing function caused by the loss of natural teeth. Its principle of action is to form a tight connection with the surrounding bone tissue after implantation, thereby providing a stable support foundation. A substitute is an entity used to replace an implant during the dental mold making process. The joint device model in the embodiment of the present application is the model corresponding to the above entity.

[0057] In another possible implementation manner of the embodiment of the present application, the joint device model can also include a substitute model and a abutment model that matches the substitute model. The above substitute model and abutment model can be integrally designed or detachable.

[0058] In the embodiment of the present application, the computer device can determine a joint device model that matches the obtained scan rod model. That is: determine a separate substitute model that matches the scan rod model, or determine a model that includes both a substitute and a abutment and matches the scan rod model.

[0059] In a possible implementation manner of the embodiment of the present application, different types of scan rod models and joint device models that match the corresponding scan rod models can be pre-stored in a database. After the computer device obtains the scan rod model, it can directly search in the database to determine a joint device model that has a matching relationship with the scan rod model.

[0060] By pre-establishing a matching relationship between the scan rod and the joint device model in the embodiment of the present application, it is convenient for the computer device to quickly determine a suitable joint device model after obtaining the scan rod model, ensuring the accuracy of the matching relationship between the scan rod and the joint device model, and further ensuring the accuracy and precision of the subsequent processing process.

[0061] In one example, when a computer device looks up a mating device model that matches a scanning rod model in a database, it can identify a first interface of the scanning rod model and identify second interfaces of each mating device model in the database. Based on the matching or complementary relationship between the first interface and the second interfaces, it determines the mating device model that matches the scanning rod model. Those skilled in the art can understand that the shapes and sizes of the first interface and the second interfaces can be configured as needed. For example, the first interface of the scanning rod model includes a rod portion with a hexagonal cross-section, while the second interface of the mating device model includes a groove portion with a hexagonal cross-section. Alternatively, the first interface of the scanning rod model includes an annular protrusion or depression, while the second interface of the mating device model includes an annular depression or protrusion.

[0062] In one example, a processor or computer identifies that the scanning rod model has a rectangular interface, and then filters out mating device models (such as abutment models) with rectangular interfaces in the database.

[0063] In another example, the computer device can also find a mating device model that matches the scanning rod model based on the matching relationship between the respective feature surfaces of the scanning rod model and the mating device model. Specifically, the computer device can identify the respective feature surfaces of the scanning rod model, and by determining whether the feature surfaces of the mating device model match the respective feature surfaces of the corresponding scanning rod model one by one, it finds the mating device model that matches the scanning rod model.

[0064] In another possible implementation manner of the embodiments of the present application, after obtaining the scanning rod model, the computer device can also directly establish or import from the outside a mating device model that has a matching relationship with the scanning rod model.

[0065] The structures and designs of scanning rods and mating devices (such as abutments) from different manufacturers may be different. For example, the scanning rod A1 from manufacturer A can only be matched or assembled with the abutment A2 from manufacturer A. However, the scanning rod A1 from manufacturer A cannot be matched or assembled with the abutment B2 from manufacturer B, or the scanning rod B1 from manufacturer B cannot be matched or assembled with the abutment A2 from manufacturer A. Storing the model information of scanning rods (with interfaces) and matching abutments (with interfaces) of multiple categories from multiple manufacturers in the database facilitates subsequent screening and retrieval of models.

[0066] In yet another possible implementation manner of the embodiments of the present application, when the mating device model is an abutment model, the abutment model can have a corresponding abutment interface, which can be used to facilitate the user's assembly with the abutment after printing the physical tooth.

[0067] In an embodiment of the present application, the above-mentioned substitute body interface may include a guiding structure, a positioning structure, and a connecting structure. Among them, the positioning structure can be used to achieve the assembly positioning with the abutment. When the outer wall of the abutment fits with the positioning structure, it is difficult for the operator to visually determine whether the assembly is in place, but can judge whether the assembly is in place through touch or resistance. The guiding structure extends towards the positioning structure. Even if the abutment has a position offset (i.e., misalignment) with the positioning structure during the assembly process, it can accurately move the abutment to the assembly position matching the positioning structure during the contact with the guiding structure, so as to achieve efficient and reliable assembly between the abutment and the solid tooth.

[0068] Specifically, the above-mentioned substitute body interface may include a threaded connecting structure. In one example, the crest width of the thread of the connecting structure may be 100 μm to 600 μm, for example, it may be 150 μm to 500 μm; or, it may be 200 μm to 450 μm, or 50 μm to 400 μm, or 300 μm to 350 μm. The embodiments of the present application do not limit this. In another example, the thread profile angle of the connecting structure may be 20 degrees to 90 degrees, and the embodiments of the present application also do not limit this.

[0069] In another possible implementation manner of the embodiment of the present application, the above-mentioned substitute body interface may further include a limiting structure. Among them, along the direction towards the aforementioned connecting structure, the cross-sectional area of the limiting structure may gradually decrease.

[0070] In yet another possible implementation manner of the embodiment of the present application, the above-mentioned substitute body interface may further include a hole-shaped positioning structure. The cross-section of the positioning structure may be a regular polygon.

[0071] In yet another possible implementation manner of the embodiment of the present application, the above-mentioned substitute body interface may further include a guiding structure. The guiding structure may include a supporting surface and a guiding surface. Among them, the supporting surface may be parallel to the horizontal plane, and the guiding surface may be inclined to the supporting surface and be adjacent to or intersect with the supporting surface.

[0072] Specifically, the number of guiding surfaces in the above-mentioned guiding structure may be one or two. When the number of guiding surfaces is one, the guiding surface may extend from one side of the supporting surface towards the connecting structure; when the number of guiding surfaces is two, the two guiding surfaces may respectively extend from opposite sides of the supporting surface towards the connecting structure.

[0073] S103. Remove the scanning rod model from the oral scan model, and add the engagement device model based on the position matching with the scanning rod model to generate a tooth model.

[0074] In an embodiment of the present application, by means of the matching relationship between the scanning rod and the joint device model, the joint device to be used when making a dental model, such as a substitute body, or a substitute body and an abutment, can be accurately determined. Therefore, the computer device can generate a tooth model based on the determined joint device model.

[0075] Exemplarily, the computer device can generate a main model that can represent the actual shape of the patient's oral cavity according to the obtained oral cavity scanning data, and then prepare a joint device at the corresponding position of the main model according to the joint device model, so as to obtain a corresponding tooth model. The teeth printed by using 3D printing technology are solid teeth that can accurately reflect the actual shape of the patient's oral cavity. At the position corresponding to the position in the patient's oral cavity where dental implants are to be performed in the solid teeth, there may be a substitute body, or there may be no substitute body, or there may also be an additional abutment.

[0076] Such as Figure 3 shown, is a schematic diagram of a tooth model provided by an embodiment of the present application. Among them, Figure 3 part (a) shows a dental model including a substitute body, and the substitute body can be inserted into Figure 3 the position corresponding to S301 shown in part (a) of Figure 3 the substitute body in the dental model is not directly shown in part (a) of Figure 3 part (b) shows a dental model without a substitute body, that is, in Figure 3 part (b) and at the position S302 corresponding to S301 in part (a) of Figure 3 no substitute body is placed; Figure 3 part (c) shows a dental model with a corresponding abutment, that is, Figure 3 the abutment A303 shown in part (c) of

[0077] In the embodiment of the present application, by obtaining an oral scan model, a computer device can determine a joint device model that matches the scan rod model included in the oral scan model. Thus, after removing the scan rod model from the oral scan model, based on the position matching relationship between the joint device model and the scan rod model, the above joint device model is added to the oral scan model to generate a tooth model. In this way, patient oral data can be obtained digitally, and then a tooth model suitable for 3D printing can be generated according to the matching joint device model, realizing accurate impression taking in the patient's oral cavity. On this basis, the embodiment of the present application can use 3D printing technology to print the corresponding solid teeth. Compared with the prior art in which a solid tooth is made first and then joint devices such as a substitute and an abutment are assembled on the tooth, the embodiment of the present application can directly generate a tooth model containing a substitute, and there is no need to assemble the substitute after printing the solid teeth, reducing the error caused by manual assembly and ensuring the accuracy of the printed solid teeth.

[0078] Refer to Figure 4 , which shows a schematic diagram of another method for generating a tooth model provided by the embodiment of the present application, and specifically may include the following steps:

[0079] S401. Obtain an oral scan model, where the oral scan model includes a scan rod model.

[0080] It should be noted that the execution subject of this method may be the same or similar computer device as the execution subject in the method described above. The manner or process by which the computer obtains the patient's oral scan model may refer to the description in the foregoing method embodiment, and will not be elaborated here.

[0081] S402. Search in the database for a joint device model that has a matching relationship with the scan rod model.

[0082] In the embodiment of the present application, the matching relationship between the scan rod and the joint device model may be pre-stored in the database. The computer device can search in the database and obtain the joint device model that has a matching relationship with the corresponding scan rod by means of automatic matching.

[0083] In a possible implementation manner of the embodiment of the present application, the database may include information such as the type and structural features (such as interface features or meshing structural features) of the scanning rod. When automatically matching the bonding device model, the computer device may first determine the type of the scanning rod installed in the patient's oral cavity according to the scanning rod information, and then associate the models in the database that are adapted to the same type of scanning rod according to the type of the scanning rod. For example, the computer device may first find the scanning rods of the same brand and the same specification or model or series in the database according to the type of the used scanning rod through classification, so as to associate one or more models in the database therewith. On this basis, the computer device may identify the bonding device model having a matching relationship with the scanning rod model from the associated models based on the structural features of the scanning rod.

[0084] In the embodiment of the present application, the structural features of the scanning rod may include multiple feature surfaces of the scanning rod. During the process of automatic matching, the computer device may match the bonding device model according to each feature surface, and identify the bonding device model that is in one-to-one correspondence with each feature surface of the scanning rod from the associated models.

[0085] Exemplarily, the feature surfaces of the scanning rod may include flat surfaces, circular surfaces, and / or arc surfaces, etc. The computer device may match different feature surfaces of the scanning rod with each bonding device model, so as to find the bonding device model that can be perfectly paired with the used scanning rod.

[0086] In the embodiment of the present application, the computer device may also find the bonding device model that matches the scanning rod model according to whether the interface of the scanning rod model and the bonding of the bonding device model are matched or complementary.

[0087] In another possible implementation manner of the embodiment of the present application, when the bonding device is a separate substitute, since the substitute serves as a support structure for supporting the abutment during the dental implant process, there may be a certain pairing or matching relationship between the substitute and the abutment. Therefore, after determining the bonding device model that is perfectly paired with the used scanning rod, the abutment model supported by the bonding device model may be further determined.

[0088] S403. Based on the position matching with the scanning rod model, determine the position of the bonding device model in the oral cavity scanning model, and add the bonding device model at the position of the oral cavity scanning model to obtain a tooth model.

[0089] The found bonding device model can be used to generate a tooth model after being added to the oral cavity scanning model. Before that, the scanning rod model needs to be removed from the oral cavity scanning model.

[0090] When adding a bonding device model to an oral scan model from which a scanning rod model has been removed, the computer device may determine the position for adding the bonding device model according to the positional matching relationship between the bonding device model and the scanning rod model.

[0091] In an embodiment of the present application, the bonding device model has a predetermined embedding depth and angle relative to the oral scan model. The computer device may determine the position for adding the bonding device model according to the above-mentioned embedding depth and angle. That is, the computer device may determine the angle for adding the bonding device model and the embedding depth of the bonding device model by judging whether the embedding depth and angle of the bonding device model to be added match the depth and angle at the corresponding position in the oral scan model, so as to obtain the position for adding the model.

[0092] After determining the position for adding the bonding device model, the computer device may add the bonding device model at this position of the oral scan model, thereby generating a digital tooth model.

[0093] S404. Determine a contour line where the bonding device model matches the oral scan model according to the type of the bonding device model, where the contour line is used to divide the model along the contour line when printing a tooth model.

[0094] In an embodiment of the present application, after generating a tooth model, a contour line where the bonding device model matches the oral scan model may also be determined according to the type of the bonding device model. This contour line may indicate to the device to divide the model along this contour line when obtaining a physical tooth by printing the tooth model subsequently. In this way, based on this contour line, the redundant part in the tooth model may be removed, so as to obtain a physically assembled tooth. The physical tooth may be a tooth including a substitute, or a tooth including both a substitute and a abutment. When using the physical tooth subsequently, there is no need to assemble the substitute anymore.

[0095] In a possible implementation manner of an embodiment of the present application, the bonding device model may be a separate substitute model, that is, the bonding device model only includes a substitute model and does not include other models. For this case, since the substitute is used to support the abutment, when removing the bonding device model, a space for installing the abutment needs to be left. Therefore, for the case where the bonding device model is a separate substitute model, the contour line may be a line formed by extending from the outer wall of the substitute model to the bottom of the substitute model.

[0096] In another possible implementation of the embodiments of the present application, the bonding device model not only includes the abutment model, but may also include a base model corresponding to the abutment model. That is, the bonding device model may be an abutment and a base designed in an integrated manner or a detachable manner. Therefore, the contour line may be a line extending from the outer wall of the abutment model to the bottom of the abutment model and enclosing the base model.

[0097] In the embodiments of the present application, according to the different types of dental models finally required, the specific methods of processing the dental models based on the determined contour lines are different.

[0098] In a possible implementation of the embodiments of the present application, if the tooth model to be generated is a model without an abutment, the physical teeth printed based on such a tooth model need to be assembled with an abutment and a base during subsequent use. Therefore, when generating a digital dental model, the computer device may determine the area enclosed by the contour extending from the outer wall of the abutment model to the bottom of the abutment model and the base model as the area to be removed.

[0099] As Figure 5 shown, it is a schematic diagram of an area to be removed provided by the embodiments of the present application. Among them, in Figure 5 part (a), a processing method for removing the abutment model and the base model when the finally obtained dental model is a dental model without an abutment is shown. As Figure 5 shown in part (a), for the finally obtained dental model without an abutment, since the dental model will be installed with an abutment at the corresponding position during use, after the corresponding abutment model and base model are removed from the tooth model, it should be ensured that this area can be used for installing the abutment and the upper base. At this time, the contour line of the removed area may extend from the outside of the abutment model to the bottom of the abutment, plus the contour of the base model, and this area is also the area Figure 5 shown in part (a) formed by the line L501.

[0100] In another possible implementation of the embodiments of the present application, if the tooth model to be generated is a model including an abutment, the computer device may determine the area enclosed by the contour extending from the inner wall of the abutment model to the bottom of the abutment model and the base model as the area to be removed.

[0101] In the embodiments of the present application, the model including an abutment may refer to a model that does not need to be installed with an abutment in the finally provided dental model. For such a model, when removing the abutment model and the base model, the area to be removed may be determined according to the inner wall of the abutment model and the base model.

[0102] As Figure 5In part (b), the specific treatment method for removing the substitute model and the abutment model when the finally obtained dental model includes a substitute model is shown. As Figure 5 shown in part (b), for the finally obtained dental model including a substitute, since this dental model will be directly paired and installed with the abutment during use, after the corresponding substitute model and abutment model are removed from the tooth model, the area should meet the purpose of directly installing the abutment. At this time, the contour line of the removed area can extend from the inside of the substitute model to the bottom of the substitute, plus the contour of the abutment model, and this area is also the Figure 5 area formed by the line L502 shown in part (b). Compared with the Figure 5 contour line shown in part (a), the Figure 5 area shown in part (b) needs to be used for directly installing the abutment, so Figure 5 the contour line of part (b) includes partial thread-shaped lines.

[0103] In a possible implementation manner of the embodiment of the present application, during the process of generating a dental model including a substitute, in order to improve the accuracy of removing the substitute model and the abutment model, the inner wall of the substitute model can also be adjusted with reference to the substitute entity.

[0104] Specifically, in actual application, when removing the substitute model, it may not be possible to strictly remove it according to the default position of the inner wall. It is necessary to combine the actually printed dental model and verify it by assembling the abutment to know the best inner position of the substitute. Therefore, it is necessary to adjust the inner wall of the substitute model according to the substitute entity. During the above adjustment process, the computer device should at least be able to implement the following functions: move the inner wall of the substitute up and down along the axial direction of the inner wall of the substitute, and rotate the inner wall of the substitute around the axial direction of the inner wall of the substitute. As Figure 6 shown, it is a schematic diagram of adjusting the inner wall of the substitute model provided by the embodiment of the present application, Figure 6 and at the same time shows the two adjustment methods that should be supported above. That is: move the inner wall of the substitute model up and down and rotate the inside of the substitute model.

[0105] In a possible implementation manner of the embodiment of the present application, if the tooth model to be generated is a model including a substitute, it is also necessary to consider removing the area without substitute protection. During this process, the computer device first needs to determine the substitute protection area in the tooth model, and then remove the entity corresponding to the substitute protection area from the tooth model.

[0106] As Figure 7 shown, it is a schematic diagram of a substitute protection area provided by the embodiment of the present application. According to Figure 7As shown, the replacement body protection area is located in the tooth model at a preset distance offset from the inner wall interface of the replacement body model, such as 1 mm, and extends axially to the area formed by the cross-section plane, such as Figure 7 the area S700 shown in

[0107] In another possible implementation manner of the embodiment of the present application, if the tooth model to be generated is a model without a replacement body, it may be necessary to consider removing the replacement body protection area, or the replacement body protection area may be retained.

[0108] As Figure 8 shown, it is a schematic diagram of a replacement body protection area provided by the embodiment of the present application. According to Figure 8 shown, the replacement body protection area may be an area located in the tooth model at a preset distance offset from the outer wall interface of the replacement body model and extending axially to the area formed by the cross-section plane, such as Figure 8 the area S800 shown in

[0109] In a possible implementation manner of the embodiment of the present application, since a part of the finally formed dental mold corresponds to the gum of the part where dental implantation is required, a separate gum model needs to be obtained using a soft material in actual applications. Therefore, during the process of generating the tooth model, the gum model part can also be removed from the dental mold.

[0110] In the embodiment of the present application, the gum area can be determined by 3 cutting planes. Among them, the first plane and the second plane can be perpendicular to the XY plane of the two-dimensional coordinate system, and the third plane can be parallel to the XY plane of the two-dimensional coordinate system.

[0111] As Figure 9 shown, it is a schematic diagram of a gum cutting plane provided by the embodiment of the present application. In Figure 9 part (a) of, a schematic diagram of the first plane and the second plane during gum cutting is shown. The above-mentioned first plane (i.e., Figure 9 plane A in Figure 9 ) and the second plane (i.e., Figure 9 plane B in Figure 9The plane C) in it can be at a first distance value a = 2 mm from the lowest point of the abutment interface of the alternative outer wall in the Z-axis of the two-dimensional coordinate system; and at a second distance value b = 2 mm from the lowest point of the abutment interface of the alternative inner wall in the above Z-axis. In a possible implementation, the above first distance value a and second distance value b can be the same distance value. For example, the first distance value a = 2 mm and the second distance value b = 2 mm. It can be understood that the above first distance value and second distance value can be designed as needed.

[0112] In a possible implementation of the embodiment of the present application, for the scanned oral scan model, the computer device can add a bottom to the oral scan model to obtain a bottom-added model. The bottom-added model can be a model with a closed bottom surface added, and this model can be a model that can reflect the true shape of the patient's oral cavity generated according to the oral scan data.

[0113] Exemplarily, after obtaining the oral scan data of the patient, the computer device can first generate a model according to the oral scan data, and then obtain a closed bottom surface by adding a bottom to the model.

[0114] As Figure 10 shown, it is a schematic diagram of a bottom-added model provided by the embodiment of the present application. Figure 10 The bottom-added model shown can be generated according to the oral scan data obtained in S401 and then added with a bottom. The bottom is as Figure 10 shown by the line B1000 in it.

[0115] In the actual processing process, the thickness of adding the bottom can be designed according to a certain expectation. Exemplarily, a certain width can be reserved on the labial and lingual sides for automatic trimming of the upper and lower jaws. Exemplarily, the above width can be between 1.5 - 2.5 mm. For example, the amount reserved on the labial and lingual sides can be equal to 2 mm for automatic trimming of the upper and lower jaws. The bottom position of the model is horizontally tangent to the plane of the lowest / highest points of all alternative outer / inner walls in the -Z / +Z direction, and an automatic bottom is added to the upper and lower jaws at a horizontal plane offset by a certain distance in the -Z / +Z direction. Exemplarily, the above distance can also be between 1.5 - 2.5 mm. For example, an automatic bottom can be added to the upper and lower jaws at a horizontal plane offset by 2 mm in the -Z / +Z direction.

[0116] Therefore, when the computer device adds the engagement device model to the oral scan model, it can add the engagement device model to the bottom-added model.

[0117] In another possible implementation manner of the embodiment of the present application, the process of adding a base can also be carried out after adding the joint device model to the oral scan model. That is, the computer device can generate a base-added model with a closed bottom surface in the oral scan model added with the joint device model, complete the base-adding process, and obtain the final digital dental model.

[0118] In a possible implementation manner of the embodiment of the present application, when generating a digital dental model, the computer device can also add an articulator to the digital dental model according to actual needs. Exemplarily, as Figure 11 shown, it is a schematic diagram of a tooth model with an articulator added provided by the embodiment of the present application.

[0119] In the embodiment of the present application, based on the methods for generating tooth models introduced in the foregoing various embodiments, referring to Figure 12 , a schematic diagram of a tooth model printing method provided by the embodiment of the present application is shown. This method is a method for printing a dental model using 3D printing technology based on the foregoing method embodiments. As Figure 12 shown, this method may specifically include the following steps:

[0120] S1201. Obtain a tooth model available for 3D printing.

[0121] In the embodiment of the present application, the tooth model available for 3D printing can be generated by using the method steps introduced in the various embodiments of the foregoing methods for generating tooth models. The embodiments of the present application will not elaborate on this.

[0122] S1202. Perform 3D printing based on the tooth model to obtain a solid tooth.

[0123] In the embodiment of the present application, based on 3D printing technology, the obtained tooth model can be processed to print a solid tooth, and the solid tooth can be an integrally formed tooth. The above solid tooth can include any one of the following: a solid tooth including a substitute, a tooth model without a substitute, or a solid tooth including a substitute and a matching abutment. The above three solid teeth can be referred to Figure 2 and the introduction in the corresponding embodiment part. The embodiments of the present application will not elaborate on this. Among them, for a solid tooth including a substitute, there is no need to assemble the substitute during subsequent use, and for a solid tooth including a substitute and a matching abutment, there is no need to assemble the substitute and the abutment during subsequent use.

[0124] Based on the generation of tooth models introduced in the foregoing various embodiments, the embodiment of the present application can print a corresponding solid tooth by using 3D printing technology, reduce the error caused by manual assembly, and ensure the accuracy of the printed tooth.

[0125] It should be noted that the sequence numbers of the steps in the above embodiments do not indicate the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0126] Referring to Figure 13 , a schematic diagram of a device for generating a dental model provided by an embodiment of the present application is shown, which may specifically include an acquisition module 1301, a determination module 1302, and a generation module 1303, where:

[0127] The acquisition module 1301 is configured to acquire an oral scan model, and the oral scan model includes a scanning rod model;

[0128] The determination module 1302 is configured to determine a joint device model that matches the scanning rod model;

[0129] The generation module 1303 is configured to remove the scanning rod model from the oral scan model and add the joint device model based on the position matching with the scanning rod model to generate a dental model.

[0130] In a possible implementation manner of the embodiment of the present application, the determination module 1302 may be configured to:

[0131] Search in a database for a joint device model that has a matching relationship with the scanning rod model; or,

[0132] Establish or import a joint device model that has a matching relationship with the scanning rod model.

[0133] In the embodiment of the present application, the determination module 1302 may also be configured to:

[0134] Identify a first interface of the scanning rod model;

[0135] Determine a joint device model that matches the scanning rod model, where the joint device model has a second interface, and the first interface matches or is complementary to the second interface.

[0136] In the embodiment of the present application, the determination module 1302 may also be configured to:

[0137] Identify each feature surface of the scanning rod model;

[0138] Determine a joint device model in which each feature surface corresponds to and matches each feature surface of the corresponding scanning rod model.

[0139] In a possible implementation manner of the embodiment of the present application, the joint device model may include:

[0140] A substitute body model; or,

[0141] A substitute body model and an abutment model that matches the substitute body model.

[0142] In a possible implementation manner of the embodiment of the present application, the engagement device model has a predetermined embedding depth and angle relative to the oral scan model.

[0143] In a possible implementation manner of the embodiment of the present application, the generating module 1303 may be used for:

[0144] Based on the position matching with the scan rod model, determine the position of the engagement device model in the oral scan model, and add the engagement device model at the position of the oral scan model to obtain a tooth model.

[0145] In the embodiment of the present application, the generating module 1303 may also be used for:

[0146] According to the type of the engagement device model, determine the contour line that matches the engagement device model and the oral scan model, and the contour line is used to divide the model along the contour line when printing the tooth model.

[0147] In a possible implementation manner of the embodiment of the present application, the engagement device model includes a substitute body model, and the generating module 1303 may be used for:

[0148] Determine that the line formed by enclosing from the outer wall of the substitute body model to the bottom of the substitute body model is the contour line for dividing the gingiva.

[0149] In another possible implementation manner of the embodiment of the present application, the engagement device model includes a substitute body model and an abutment model that matches the substitute body model, and the generating module 1303 may also be used for:

[0150] Determine that the line formed by enclosing from the outer wall of the substitute body model to the bottom of the substitute body model and the abutment model is the contour line for dividing the gingiva.

[0151] In the embodiment of the present application, the generating module 1303 may also be used for:

[0152] Generate a bottom-added model with a closed bottom surface in the oral scan model added with the engagement device model.

[0153] In the embodiment of the present application, the generating module 1303 may also be used for: adding an articulator to the tooth model.

[0154] A device for generating a tooth model provided by an embodiment of the present application. By applying this device, each step in the foregoing various method embodiments for generating a tooth model can be implemented.

[0155] Reference Figure 14 , a schematic diagram of a dental model printing device provided by an embodiment of the present application is shown. Specifically, it may include an acquisition module 1401 and a printing module 1402, where:

[0156] The acquisition module 1401 is configured to acquire a dental model available for 3D printing;

[0157] The printing module 1402 is configured to perform 3D printing based on the dental model to obtain a physical tooth.

[0158] Wherein, the above-mentioned dental model can be generated by calling the aforementioned device for generating a dental model.

[0159] In a possible implementation manner of the embodiment of the present application, the physical tooth may include any one of the following:

[0160] A physical tooth including a substitute, or a physical tooth including a substitute and a matching abutment.

[0161] A dental model printing device provided by an embodiment of the present application. By applying this device, each step in the above-mentioned various embodiments of the dental model printing method can be implemented.

[0162] Reference Figure 15 , a schematic diagram of a computer device provided by an embodiment of the present application is shown. As Figure 15 shown, the computer device 1500 in the embodiment of the present application includes: a processor 1510, a memory 1520, and a computer program 1521 stored in the memory 1520 and executable on the processor 1510. When the processor 1510 executes the computer program 1521, the steps in the above-mentioned methods for generating a dental model and various embodiments of the dental model printing method are implemented, such as Figure 1 the steps S101 to S103 shown, or Figure 12 the steps S1201 to S1202 shown. Or, when the processor 1510 executes the computer program 1521, the functions of each module / unit in the above-mentioned various device embodiments are implemented, such as Figure 13 the functions of the modules 1301 to 1303 shown, or, for example, Figure 14 the functions of the modules 1401 to 1402 shown.

[0163] Exemplarily, the computer program 1521 can be divided into one or more modules / units, which are stored in the memory 1520 and executed by the processor 1510 to complete this application. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and these instruction segments can be used to describe the execution process of the computer program 1521 in the computer device 1500. For example, the computer program 1521 can be divided into an acquisition module, a determination module, and a generation module, and the specific functions of each module are as follows:

[0164] The acquisition module is used to acquire an oral scan model, and the oral scan model includes a scan rod model;

[0165] The determination module is used to determine a joint device model that matches the scan rod model;

[0166] The generation module is used to remove the scan rod model from the oral scan model and add the joint device model based on the position matching with the scan rod model to generate a tooth model.

[0167] Alternatively, the computer program 1521 can be divided into an acquisition module and a printing module, and the specific functions of each module are as follows:

[0168] The acquisition module is used to acquire a tooth model available for 3D printing;

[0169] The printing module is used to perform 3D printing based on the tooth model to obtain a physical tooth.

[0170] Wherein, the tooth model is generated by calling the device described in the third aspect above.

[0171] Wherein, the above tooth model can be generated by the steps in each of the various embodiments of the foregoing method for generating a tooth model.

[0172] The computer device 1500 can be an electronic device capable of implementing each step in the foregoing various method embodiments. The computer device 1500 can be a computing device such as a desktop computer or a cloud server. The computer device 1500 may include, but is not limited to, a processor 1510 and a memory 1520. Those skilled in the art can understand that Figure 15 This is only an example of the computer device 1500 and does not constitute a limitation on the computer device 1500. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, the computer device 1500 may further include input / output devices, network access devices, a bus, etc.

[0173] The processor 1510 may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0174] The memory 1520 may be an internal storage unit of the computer device 1500, such as the hard disk or memory of the computer device 1500. The memory 1520 may also be an external storage device of the computer device 1500, such as a plug-in hard disk equipped on the computer device 1500, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory 1520 may also include both the internal storage unit and the external storage device of the computer device 1500. The memory 1520 is used to store the computer program 1521 and other programs and data required by the computer device 1500. The memory 1520 may also be used to temporarily store data that has been output or is to be output.

[0175] An embodiment of the present application also discloses a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the methods described in the foregoing respective embodiments are implemented.

[0176] An embodiment of the present application also discloses a computer-readable storage medium storing a computer program, and when the computer program is executed by a computer, the methods described in the foregoing respective embodiments are implemented.

[0177] An embodiment of the present application also discloses a computer program product including a computer program. When the computer program runs on a computer, the computer is caused to execute the methods described in the foregoing respective embodiments.

[0178] In some embodiments, the present application provides an implant dental model manufactured by 3D printing (e.g., made of photosensitive resin), which includes a substitute body interface (or "engagement device model"), and the substitute body interface includes a threaded connection structure. The crest width of the thread of the connection structure is 100 μm to 600 μm, such as 150 μm to 500 μm, such as 200 μm to 450 μm, such as 250 μm to 400 μm, such as 300 μm to 350 μm. Those skilled in the art can understand that the size of the implant dental model of the present application is adapted to the metal abutment and / or crown to be used in the patient's mouth subsequently, so the dimensional accuracy requirements are relatively high. In the related art, the accuracy of the threads of the metal substitute body, metal abutment, and metal screw manufactured by machining (cutting) is, for example, 5 μm to 20 μm, and the metal parts with this accuracy also have good wear resistance. The implant dental model provided by the present application includes the structural features of the substitute body and thus omits the use of the metal substitute body in the related art. Specifically, the present application manufactures an implant dental model with substitute body features (i.e., substitute body interface) by 3D printing (e.g., stereolithography 3D printing). 3D printing manufactures products in a layer-by-layer cumulative manner, and the manufactured products exhibit "layer lines" on the contour surface. In addition, the accuracy of 3D printing (referring to the accuracy of using commercially available conventional 3D printing equipment) is inferior to that of machining. For example, the layer thickness of a single layer constructed by 3D printing is 50 μm to 100 μm. If the pitch of the thread of the connection structure of the substitute body interface of the implant dental model (the pitch is greater than the crest width) is, for example, less than 50 μm or 100 μm, the thread features of the connection structure may not be obtained by 3D printing (although they can be obtained by machining). At least for the purpose of manufacturing features, the crest width of the engaging device 3 and the connection structure 13 designed in the present application is 100 μm to 600 μm, which enables the constructed thread features to be formed by multiple cured layers, thereby realizing the manufacture of an implant dental model with substitute body features on the basis of meeting the accuracy requirements of 3D printing.

[0179] In some embodiments, the thread profile angle of the thread of the connection structure 13 is 20° to 90°. Those skilled in the art can understand that the lower the thread profile angle, the more the side adjacent to the crest is approximately parallel to the horizontal plane, which is also beneficial to manufacturing thread features by 3D printing.

[0180] The present application also provides an implant dental model kit, which includes: the aforementioned implant dental model; an abutment that cooperates with the substitute body interface; and a fixing device that engages with the connection structure of the substitute body interface (such as thread engagement). In some embodiments, the implant dental model of the implant dental model kit is made of a resin material, and the abutment is made of a resin material (e.g., for 3D printing) or a metal material (e.g., for machining).

[0181] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A method for generating a dental model, characterized in that, Comprising: Obtaining an oral scan model, where the oral scan model includes a scan rod model; Determining a joining device model that matches the scan rod model; Removing the scan rod model from the oral scan model and adding the joining device model based on a position match with the scan rod model to generate a tooth model.

2. The method according to claim 1, wherein The determining of the joining device model that matches the scan rod model includes: Searching in a database for a joining device model that has a matching relationship with the scan rod model; or, Establishing or importing a joining device model that has a matching relationship with the scan rod model.

3. The method according to claim 2, wherein The searching in the database for a joining device model that has a matching relationship with the scan rod model includes: Identifying a first interface of the scan rod model; Determining a joining device model that matches the scan rod model, where the joining device model has a second interface and the first interface matches or is complementary to the second interface.

4. The method according to claim 2, wherein The searching in the database for a joining device model that has a matching relationship with the scan rod model includes: Identifying each feature surface of the scan rod model; Determining a joining device model whose feature surfaces match each feature surface of the corresponding scan rod model one by one.

5. The method according to claim 1, characterized in that, The joining device model includes: A substitute body model. Preferably, the substitute body model has a thread, and the crest width of the thread is 100 μm to 600 μm; or, A substitute body model and a abutment model that matches the substitute body model. Preferably, the substitute body model and the abutment model have mutually matching threads, and the crest width of the thread is 100 μm to 600 μm.

6. The method according to claim 5, wherein The joining device model has a predetermined embedding depth and angle relative to the oral scan model.

7. The method according to any one of claims 1 to 6, characterized in that, The adding of the joining device model based on a position match with the scan rod model to generate a tooth model includes: Based on a position match with the scan rod model, determining the position of the joining device model in the oral scan model and adding the joining device model at the position in the oral scan model to obtain a tooth model.

8. The method according to claim 7, wherein After adding the joining device model, it further includes: According to the type of the joining device model, determining a contour line that matches the oral scan model for the joining device model, and the contour line is used to divide the model along the contour line when printing the tooth model.

9. The method according to claim 8, wherein The joining device model includes a substitute body model. The determining of the contour line that matches the oral scan model for the joining device model according to the type of the joining device model includes: Determining that a line formed by extending from the outer wall of the substitute body model to the bottom of the substitute body model and enclosing is the contour line for dividing the gingiva.

10. The method according to claim 8, characterized in that The joining device model includes a substitute body model and a abutment model that matches the substitute body model. The determining of the contour line that matches the oral scan model for the joining device model according to the type of the joining device model includes: Determining that a line formed by extending from the outer wall of the substitute body model to the bottom of the substitute body model and enclosing with the abutment model is the contour line for dividing the gingiva.

11. The method according to any one of claims 1 to 6 or 8 to 10, characterized in that, After adding the joining device model, it further includes: Generate a bottom-added model with a closed bottom surface in the oral scan model with the bonding device model added thereto.

12. The method according to claim 11, wherein After generating the tooth model, it further includes: adding an articulator to the tooth model.

13. A method for printing a dental model, characterized in that, It includes: Obtain a tooth model available for 3D printing; Perform 3D printing based on the tooth model to obtain a solid tooth; Wherein, the tooth model is generated by the method according to any one of claims 1 to 12.

14. The method according to claim 13, characterized in that, The solid tooth includes any one of the following: A solid tooth including a substitute, or a solid tooth including a substitute and a matching abutment.

15. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, the computer device is caused to implement the method according to any one of claims 1 to 12.

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