Method for manufacturing dental implant model and 3D printing system

Abstract

The embodiment of the invention is suitable for the technical field of dentistry and 3D printing, and provides a method for manufacturing an implant tooth model and a 3D printing system.The method comprises the steps that an implant tooth model with a substitute body interface is obtained; and based on the dental implant model, manufacturing the dental implant model made of resin through 3D printing. Wherein the substitute body interface can comprise a threaded connection structure. By adopting the method, the problems existing when the dental cast containing the substitute body is assembled with the abutment can be solved, the assembly difficulty is reduced, and the assembly precision of the dental cast and the abutment is improved.

Description

Technical Field

[0001] Embodiments of the present application belong to the fields of dental technology and 3D printing technology, and particularly relate to a method for manufacturing an implant dental model and a 3D printing system. Background Art

[0002] Dental implant is a common dental treatment technology. Implementing the dental implant technology requires taking a mold to determine the patient's oral condition, manufacturing a corresponding dental model, and then implanting the dental model into the patient's oral cavity.

[0003] Generally, during the process of manufacturing a dental model, a substitute body also needs to be manufactured, and the substitute body is assembled onto the manufactured dental model by manual assembly. Due to the operation by manual assembly, deviations are likely to occur between the substitute body and the dental model, affecting the final implant effect.

[0004] In view of the above problems, related research has begun to consider manufacturing a substitute body model synchronously when manufacturing a dental model, and then using 3D printing technology to print a dental model including the substitute body, so as to reduce the possible deviations in subsequent assembly. However, during the actual dental implant process, it is necessary to first implant an implant in the patient's oral cavity as a support structure, and then connect a abutment to the implant to fix the dental model. The dental model including the substitute body manufactured in the foregoing solution needs to be fixed to the abutment to finally complete the entire dental implant process. In the actual use process of the integrally formed dental model including the substitute body obtained by 3D printing, there are also some problems when assembling with the abutment. Summary of the Invention

[0005] In view of this, embodiments of the present application provide a method for manufacturing an implant dental model and a 3D printing system, so as to solve some problems existing when the dental model including the substitute body is assembled with the abutment, reduce the assembly difficulty, and improve the assembly accuracy of the dental model and the abutment.

[0006] The first aspect of the embodiments of the present application provides a method for manufacturing an implant dental model, including:

[0007] Obtaining an implant dental model with a substitute body interface;

[0008] Based on the implant dental model, manufacturing an implant dental model made of resin by 3D printing.

[0009] Optionally, the manufacturing an implant dental model made of resin by 3D printing based on the implant dental model includes:

[0010] Determining an assembly part and a non-assembly part of the implant dental model, where the assembly part is associated with the substitute body interface;

[0011] The assembly part is made of a first material, and at least the non-assembly part is made of a second material, wherein the first material has higher wear resistance than the second material; and / or the assembly part has higher hardness than the non-assembly part.

[0012] Optionally, the non-assembly part at least partially surrounds the assembly part.

[0013] Optionally, the alternative body interface includes a threaded connection structure, and the crest width of the thread of the connection structure is 100 μm to 600 μm.

[0014] Optionally, the thread profile angle of the thread is 20 degrees to 90 degrees.

[0015] Optionally, the alternative body interface further includes a limiting structure, and along the direction towards the connection structure, the cross-sectional area of the limiting structure gradually decreases.

[0016] Optionally, the alternative body interface further includes a hole-shaped positioning structure, and the cross-section of the positioning structure is a regular polygon.

[0017] Optionally, the alternative body interface further includes a guiding structure, and the guiding structure includes a supporting surface and a guiding surface, the supporting surface is parallel to the horizontal plane, and the guiding surface is inclined to the supporting surface and is adjacent to or intersects with the supporting surface.

[0018] Optionally, the number of the guiding surfaces is one or two; when the number of the guiding surfaces is one, the guiding surface extends from one side of the supporting surface towards the connection structure; when the number of the guiding surfaces is two, the two guiding surfaces respectively extend from opposite sides of the supporting surface towards the connection structure.

[0019] Optionally, the obtaining of the dental implant model with an alternative body interface includes:

[0020] Searching in a database for an alternative body model including at least a threaded connection structure; or, establishing or importing an alternative body model including at least a threaded connection structure;

[0021] Generating a dental implant model with an alternative body interface based on the alternative body model, so that the alternative body interface includes the threaded connection structure in the alternative body model.

[0022] Optionally, the manufacturing of the dental implant model made of resin by 3D printing based on the dental implant model further includes:

[0023] Performing slicing processing on the dental implant model to obtain a plurality of slice images;

[0024] Determining a plurality of size adjustment values according to the plurality of slice images;

[0025] Determine a plurality of gray compensation parameters according to the relationships between the plurality of dimension adjustment values, the gray compensation parameters, and the printing dimension adjustment values.

[0026] Perform gray processing on the edge pixels of the corresponding plurality of contours in each of the slice images according to the plurality of gray compensation parameters, and perform 3D printing on each of the processed slice images to obtain the dental implant model.

[0027] Optionally, before manufacturing a dental implant model made of resin by 3D printing based on the dental implant model, it further includes:

[0028] Perform axis distance compensation on the dental implant model.

[0029] Optionally, the performing axis distance compensation on the dental implant model includes:

[0030] Obtain a three-dimensional surface mesh generated based on the dental implant model;

[0031] Based on the three-dimensional surface mesh, determine a target surface voxel and spatial angle information of the target surface voxel;

[0032] Based on the spatial angle information, determine an axial distance compensation value for the forming platform to adjust the distance to the target surface voxel;

[0033] In the case where there are multiple target surface voxels, generate a corrected model of the dental implant model based on the axial distance compensation values respectively corresponding to the multiple target surface voxels, and the corrected model is used to perform slice printing processing to obtain the dental implant model.

[0034] A second aspect of the embodiments of the present application provides an apparatus for manufacturing a dental implant model, including:

[0035] An acquisition module, configured to acquire a dental implant model with a replacement body interface;

[0036] A printing module, configured to manufacture a dental implant model made of resin by 3D printing based on the dental implant model.

[0037] A third 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 according to any one of the first aspects described above.

[0038] In a fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided. A computer program is stored in the computer-readable storage medium. When the computer program is executed by a computer, the method described in any one of the above first aspects is implemented.

[0039] In a fifth aspect of the embodiments of the present application, a computer program product is provided, including a computer program. When the computer program runs, the method described in any one of the above first aspects is executed.

[0040] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0041] In the embodiments of the present application, an implant dental model with a substitute body interface can be obtained. Based on this implant dental model, an implant dental model made of resin can be manufactured by 3D printing. By designing a substitute body interface with a certain structure in the embodiments of the present application, an implant dental model that can be precisely matched with the abutment required for subsequent use can be obtained, improving the assembly accuracy when the implant dental model printed based on the above implant dental model is assembled with the abutment.

[0042] On the basis of obtaining the implant dental model with a substitute body interface as described above, the embodiments of the present application can further improve the printing accuracy and reduce the assembly difficulty between the printed implant dental model and the metal abutment by optimizing the 3D printing process, correcting the axial distance of the implant dental model before printing, and using technical means such as dual-material printing. Description of the Drawings

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description 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.

[0044] Figure 1 It is a schematic diagram of a method for manufacturing an implant dental model provided by the embodiments of the present application;

[0045] Figure 2 It is a top view of a substitute body print provided by the embodiments of the present application;

[0046] Figure 3 It is provided by the embodiments of the present application along Figure 2 A cross-sectional view taken along B-B in;

[0047] Figure 4 It is a detailed enlarged view of the top view part of the implant dental model provided by the embodiments of the present application;

[0048] Figure 5Cross-section of the connection structure provided by the embodiment of the present application Figure 1 ;

[0049] Figure 6 Cross-section of the connection structure provided by the embodiment of the present application Figure 2 ;

[0050] Figure 7 Exploded view of the planting model provided by the embodiment of the present application;

[0051] Figure 8 Schematic diagram of the structure of the abutment provided by the embodiment of the present application;

[0052] Figure 9 Bottom view of the abutment provided by the embodiment of the present application;

[0053] Figure 10 Partial cross-sectional view of the dental implant model provided by the embodiment of the present application;

[0054] Figure 11 Provided by the embodiment of the present application Figure 10 Enlarged detail view of part C in

[0055] Figure 12 Provided by the embodiment of the present application Figure 10 Enlarged detail view of part D in

[0056] Figure 13 Provided by the embodiment of the present application Figure 10 Enlarged detail view of part E in

[0057] Figure 14 Provided by the embodiment of the present application Figure 10 Enlarged detail view of part F in

[0058] Figure 15 Schematic diagram of a possible implementation of S102 in a method for manufacturing a dental implant model provided by the embodiment of the present application;

[0059] Figure 16 Schematic diagram of another possible implementation of S102 in a method for manufacturing a dental implant model provided by the embodiment of the present application;

[0060] Figure 17 Schematic diagram of the positional relationship between the assembled part and the non-assembled part of a dental implant model provided by the embodiment of the present application;

[0061] Figure 18 Schematic diagram of a device for manufacturing a dental implant model provided by the embodiment of the present application;

[0062] Figure 19 Schematic diagram of a computer device provided by the embodiment of the present application. Detailed implementation manners

[0063] 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.

[0064] As described in the background art, the dental implant model automatically generated using digital technology can be a dental model including a substitute interface. In this way, an integrally formed dental implant model (i.e., a solid tooth) can be obtained by printing the dental model including the substitute interface. Since the printed dental implant model already includes a substitute, there is no need to install a metal substitute into the solid tooth during dental implantation.

[0065] However, the integrally formed dental implant model including a substitute obtained by 3D printing has a lower accuracy than the metal substitute during actual use, which easily leads to the problem of unsuccessful assembly, that is, the matching problem between the dental model including the substitute model and the actual abutment after printing. It mainly includes the following aspects:

[0066] 1. Material problem: The printing model usually uses resin material, which is softer than metal in texture. When screwing the abutment into the printed dental implant model, the operator's torque perception is not obvious, and there may also be a problem of being screwed out of shape, or the operator continues to turn, causing the abutment to sink, resulting in the crown of the implant sinking, and then leading to the failure of implant restoration. Due to the material problem, when testing the dental model, the perception of the same user when assembling parts produced by different manufacturers is different, which may lead to differences in test results.

[0067] 2. Printing accuracy problem: The layer-by-layer curing process used in 3D printing will cause deviations when printing the hole structure in the model. For example, the actual circle in the model becomes an ellipse after forming, which will result in low printing accuracy and high error. In practical applications, the tolerance of the error may reach 0.04 mm, while the error of the conventional metal processing accuracy can be controlled within 0.01 mm. The large error may cause the abutment to be unable to be assembled with the printed dental implant model, thus unable to verify the generation and printing process of the dental model.

[0068] 3. Repeated disassembly and assembly problem: In practical applications, there may be a need to repeatedly disassemble and assemble the abutment and the dental model. Repeatedly disassembling and assembling the metal abutment and the implant model multiple times may cause wear or deformation at the positions (such as threads, etc.) in the model that cooperate with the abutment, resulting in non-matching assembly and problems similar to slipping threads, and the abutment and the tooth cannot be tightened.

[0069] In view of at least one of the above problems that may occur when the printed dental implant model is assembled with the abutment, the embodiment of the present application provides a method for manufacturing a dental implant model. An optimized substitute interface can be designed to generate a substitute model. After adding the substitute model to the oral scan model, the corresponding dental implant model can be obtained. On this basis, combined with 3D printing technology, by printing the generated dental implant model, a solid tooth that can be precisely matched with the abutment can be obtained, improving the assembly accuracy of the abutment and the dental implant model. In addition, when using 3D printing technology to print the dental implant model, the embodiment of the present application can also improve the printing accuracy of the hole structure in the dental implant model through technical means such as size adjustment, axial distance compensation, and dual-material printing, as close as possible to the effect of processing metal materials, and further improve the assembly accuracy.

[0070] The technical solution of the present application will be described below through specific embodiments.

[0071] Refer to Figure 1 , which shows a schematic diagram of a method for manufacturing a dental implant model provided by the embodiment of the present application. Specifically, it may include the following steps:

[0072] S101. Obtain a dental implant model with a substitute interface.

[0073] 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 each step of the method provided by the embodiment of the present application, the computer device can manufacture a dental implant model made of resin. For example, the above computer device can be a printing device capable of 3D printing.

[0074] Unless otherwise specified, the "dental implant model" or "tooth model" mentioned in the embodiment of the present application can represent a digital model generated in a digital manner; the "dental implant model" or "solid tooth" can represent a solid tooth obtained by printing or manufacturing the above digital model.

[0075] In the embodiment of the present application, the substitute interface in the dental implant model can be designed according to a certain process strategy. By designing the substitute interface, after the dental implant model is printed into a solid tooth, the user can quickly realize the assembly with the abutment based on the substitute interface, reducing the assembly difficulty between the solid tooth and the abutment and improving the assembly accuracy.

[0076] In a possible implementation manner of the embodiment of the present application, the above-mentioned substitute body interface may include a threaded connection structure. In one example, the crest width of the thread of the connection structure may be 100 μm to 600 μm, such as 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 embodiment of the present application does not limit this. In another example, the thread profile angle of the thread of the connection structure may be 20 degrees to 90 degrees, and the embodiment of the present application also does not limit this.

[0077] In another possible implementation manner of the embodiment of the present application, the above-mentioned substitute body interface may further include a limiting structure. Wherein, along the direction towards the aforementioned connection structure, the cross-sectional area of the limiting structure may gradually decrease.

[0078] 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.

[0079] 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. Wherein, 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.

[0080] 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 connection 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 connection structure.

[0081] For the convenience of understanding, the substitute body interface will be introduced in detail below with reference to specific drawings. It should be noted that the substitute body interface introduced below with reference to the drawings is a part of the substitute body model designed based on the process strategy. After the substitute body model is added to the oral scan model, an implant model with the corresponding substitute body interface can be obtained. Correspondingly, the following Figures 2 to 14 shown substitute body model or implant model can also have Figures 2 to 14 the various structures or interface structures shown after the implant model is obtained by 3D printing.

[0082] Please refer to Figures 2 to 14 , a substitute body interface provided by the embodiment of the present application can be used to connect with the abutment 2 and the screw 3 of the abutment 2. As Figure 7 and Figure 10 shown, by fixing the abutment 2 and the screw 3 to the implant model 1, it is convenient to fabricate a prosthesis on the abutment 2.

[0083] Please refer to Figure 2 and Figure 3 along the axial direction of the interface, a guiding structure 11, a positioning structure 12 and a connecting structure 13 are provided on the inner wall of the interface. The positioning structure 12 is used to realize the assembly positioning of the abutment 2. When the outer wall of the abutment 2 is in contact with the positioning structure 12, it is difficult for the operator to determine whether the assembly is in place by visual inspection, but can judge whether the assembly is in place through touch or resistance. The guiding structure 11 extends towards the positioning structure 12. Even if there is a position offset (i.e., misalignment) between the abutment 2 and the positioning structure 12 during the assembly process, the abutment 2 can be accurately moved to the assembly position matching the positioning structure 12 during the contact with the guiding structure 11, so as to realize the efficient and reliable assembly between the abutment 2 and the substitute body printed part 1.

[0084] It should be noted that the guiding structure 11, the positioning structure 12 and the connecting structure 13 on the aforementioned substitute body interface can be made by 3D printing technology, without secondary machining of the cured plastic substitute body, which can greatly improve the production efficiency of the substitute body and reduce the manufacturing cost.

[0085] In some embodiments of the present application, please refer to Figure 3 and Figure 4 the guiding structure 11 includes a guiding surface arranged along the circumferential direction of the positioning structure 12. The guiding surface is inclined relative to the horizontal plane, so that the abutment 2 can slide along the guiding surface as it rotates until the abutment 2 is installed in place with the positioning structure 12. When the guiding surface contacts the outer surface of the abutment 2, the abutment 2 can be guided into the positioning structure 12 through the inclined guiding surface in the non-visible situation.

[0086] In some embodiments of the present application, when the axis direction of the interface is parallel to the vertical direction, the guiding surface is inclined downward, as shown in Figure 3 and Figure 4 the bottom of the abutment 2 can slide along the guiding surface into the positioning structure 12.

[0087] In some embodiments of the present application, please refer to Figure 3 when the axis direction of the interface is parallel to the vertical direction, the inclination angle of the guiding surface relative to the horizontal plane is α, and the value range of α is 10°≤α≤85°. This is because when the inclination angle of the guiding surface is less than 30°, the slope of the guiding surface is small, and the abutment needs a long guiding stroke to reach the position matching the positioning structure; when the inclination angle of the guiding surface is large, for example, (60° to 80°) greater than 80°, due to the large inclination angle (approximate to vertical), the abutment 2 may need to rotate a certain angle before reaching the guiding surface during the assembly process, and the subsequent stroke of the abutment 2 on the guiding surface will be very short.

[0088] In some embodiments of the present application, please refer toFigure 3 and Figure 4 , the guiding surface is an inclined plane or a curved surface. As long as it can play a role in guiding the assembly of the base 2, the purpose of this application can be achieved.

[0089] In some embodiments of this application, please refer to Figure 4 , the number of guiding surfaces is multiple, and the multiple guiding surfaces are evenly distributed in the circumferential direction of the positioning structure 12, which can play a uniform guiding role on the outer circumferential surface of the base 2.

[0090] In some embodiments of this application, please refer to Figure 4 , the guiding structure 11 includes at least one guiding area, and each guiding area includes two guiding surfaces. Each guiding surface can guide the outer surface of the base 2 from different orientations, so that the base 2 is adjusted to an assembly state matching the positioning structure 12 under the cooperation of multiple guiding areas.

[0091] As a specific embodiment of this application, please refer to Figure 4 , there are multiple guiding areas in the circumferential direction of the positioning structure 12. Each guiding area includes a first guiding surface 111, a second guiding surface 112 and a supporting surface 113, wherein the first guiding surface 111 and the second guiding surface 112 are respectively arranged on opposite sides of the supporting surface 113. When the base 2 contacts the first guiding surface 111, it can rotate leftward and descend to the assembly position with the positioning structure 12, for example. When the base 2 contacts the second guiding surface 112, it can rotate rightward and descend to the assembly position with the positioning structure 12. When the outer surface of the base 2 contacts the supporting surface 113, it can rotate leftward or rightward to contact the first guiding surface 111 or the second guiding surface 112 accordingly.

[0092] In some embodiments of this application, please refer to Figure 2 , Figure 4 , Figure 10 and Figure 11 , the circumferential direction of the positioning structure 12 includes one or more positioning surfaces 121 for realizing positioning and fitting with the base 2. One or more positioning surfaces 121 enclose a positioning groove 122, which can be used for realizing positioning and fitting with the bottom of the base 2. The positioning surface 121 is connected to the guiding structure 11 in a transitional manner, which can reduce the moving resistance of the outer surface of the base 2 during the process of moving from the guiding structure 11 to the state of fitting with the positioning surface 121.

[0093] In some embodiments of this application, please refer to Figure 2 and Figure 4 , the cross-sectional shape of the positioning groove 122 is, for example, a regular polygon, which can be used to form a prismatic or cylindrical positioning groove 122, so as to form a uniform positioning effect on the outer circumference of the base 2.

[0094] It should be noted that one or more guide areas are provided on the circumference of the positioning groove 122, and each guide area is provided with one or two guide surfaces. In some embodiments of the present application, when the cross-sectional shape of the positioning groove 122 is a regular polygon, each corner or each side of the positioning groove 122 is provided with a corresponding guide area.

[0095] In some embodiments of this application, please refer to Figure 2 , Figure 4 and Figure 8 The cross-sectional shape of the positioning groove 122 is a regular hexagon. Accordingly, the bottom of the base 2 is provided with a positioning portion 21 that matches the positioning groove 122, and the cross-sectional shape of the positioning portion 21 is also a regular hexagon. When the positioning portion 21 is embedded in the positioning groove 122, it can be determined that the base 2 and the dental implant mold 1 have reached an accurate assembly position. At this time, the positioning portion 21 (or the base 2) cannot rotate in the positioning groove 122, and the user can determine that the base has been installed in place and start the subsequent screw locking operation.

[0096] In some embodiments of this application, please refer to Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 10 The connection structure 13 is a threaded structure or a snap-on structure, so that the dental implant mold 1 can be detachably connected to the screw 3 by threaded connection or snap-on connection, which is convenient for disassembly and assembly of the base 2 and the screw 3 after the final restoration is manufactured.

[0097] In some embodiments of this application, please refer to Figure 5 , Figure 6 , Figure 10 and Figure 12 The thread structure is a triangular thread, a rectangular thread, a trapezoidal thread or a zigzag thread, all of which can achieve a threaded connection between the connecting structure 13 and the screw 3.

[0098] In some embodiments of the present application, the tooth angle of the thread structure ranges from 30° to 90°, which is conducive to the preparation of the connection structure 13 by 3D printing. In some embodiments of the present application, the thread structure is preferably a rectangular thread, a trapezoidal thread or a sawtooth thread. Since the thread crest has a certain width, the thread teeth have a certain thickness, and the pitch is increased, it is conducive to improving the force stability of the thread structure, and it can be screwed multiple times without slipping under a fixed required torque. When the metal connector is screwed with the plastic thread structure, the thread wear of the connection structure 13 can be reduced.

[0099] In some embodiments of this application, please refer to Figure 5, the connecting structure 13 includes a first thread structure 131 which is a trapezoidal thread. The tooth profile angle of this trapezoidal thread is β, the tooth top width is W1, the tooth height is H1, and the pitch is P1. The specific parameters can be designed according to the force analysis of the connecting structure 13 and relevant factors of the 3D printing process.

[0100] In some other embodiments of the present application, please refer to Figure 6 , the connecting structure 13 includes a second thread structure 132 which is a trapezoidal thread. The tooth profile angle of this trapezoidal thread is γ, the tooth top width is W2, the tooth height is H2, and the pitch is P2. The specific parameters can be designed according to the force analysis of the connecting structure 13 and relevant factors of the 3D printing process.

[0101] In some embodiments of the present application, W1 > W2 and P1 > P2, so that the first thread structure 131 has a stronger load-bearing capacity and is suitable for occasions where the connecting structure 13 is subjected to greater forces; while the second thread structure 132 is more suitable for occasions with limited space and higher requirements for thread accuracy and fineness.

[0102] In some embodiments of the present application, the connecting structure 13 is a snap-fit structure. The snap-fit structure can specifically be an annular protrusion, an annular groove, a screw-in buckle feature or an insert-in buckle feature, all of which can be used to achieve the snap-fit connection between the connecting structure 13 and the screw 3.

[0103] S102. Based on the dental implant model, a dental implant made of resin is manufactured by 3D printing.

[0104] In the embodiments of the present application, based on 3D printing technology, the obtained dental implant model can be processed to print a dental implant made of resin, that is, a solid tooth. This solid tooth can be an integrally formed tooth. Since the aforementioned dental implant model is a digital dental model containing a substitute model, the printed solid tooth also contains a substitute. In this way, when using this solid tooth for dental implantation, there is no need to assemble the substitute anymore, but the abutment can be directly assembled with the solid tooth.

[0105] The embodiments of the present application provide a dental implant with a guiding structure, a positioning structure, a connecting structure, etc. The positioning structure can be used to achieve the assembly positioning of the abutment, ensuring that the abutment is partially inserted into the positioning structure and installed in place, so as to feedback the tactile sensation of being installed in place in an invisible situation; and the guiding structure extends towards the positioning structure. Even if there is a misalignment in the assembly position between the abutment and the dental implant, the abutment can be accurately moved to the assembly position matching the positioning structure through the guiding structure, realizing the efficient and reliable assembly between the abutment and the dental implant.

[0106] In a possible implementation of an embodiment of the present application, in order to improve the accuracy of the printed physical teeth, for example, to improve the printing accuracy of the hole structure in the digital dental model, so that the printed physical teeth have a metal processing effect as much as possible, the implementation of the present application also optimizes the 3D printing process, so that the assembly contour of the printed physical teeth is more detailed and the accuracy is higher.

[0107] For example, Figure 15 , which is a schematic diagram of a possible implementation of S102 in the method for manufacturing a dental implant mold provided in an embodiment of the present application, Figure 15 The printing process shown shows the specific steps of optimizing the 3D printing process, and the process may specifically include the following steps S1501-S1504:

[0108] S1501, slicing the dental implant model to obtain a plurality of slice images.

[0109] It should be noted that Figure 15 The 3D printing process shown can be applied to photocuring 3D printing, which includes SLA (Stereo Lithography Appearance), DLP (Digital Light Processing), LCOS (Liquid Crystal on Silicon), and LCD (Liquid Crystal Display) photocuring printing; it can also be photocuring printing in the form of surface exposure, such as DLP, LCOS, and LCD.

[0110] The above-mentioned slicing process can be completed by a 3D printing device before printing the dental implant mold model. The printing process of the 3D printing device is also a process of printing each slice image.

[0111] In an embodiment of the present application, after the dental implant mold model is sliced to obtain a plurality of slice images, the relationship between the grayscale compensation parameter and the print size adjustment value can also be obtained.

[0112] Specifically, through a large number of experiments, it is proved that after the gray-scale adjustment of the model contour edge in a single slice image, the contour size of the model in the cured sheet will change, and there is a positive correlation between the gray-scale adjustment parameter and the size adjustment value. After performing corresponding gray-scale processing on one pixel of the outermost layer of the model contour edge, the contour size of the model (i.e., the solid three-dimensional model) in the cured sheet can be adjusted, and the accuracy of this size adjustment can be controlled within the range of non-integer multiple pixel sizes. For example, it can be adjusted to corresponding sizes such as 0.1 pixel, 1.2 pixels, or 10.8 pixels, etc. The adjustment of non-integer multiple pixel sizes is to perform different gray-scale superpositions in units of pixels after identifying the contour map edge (for example, when the gray scale within a single pixel is 0-225) to achieve the adjustment of non-integer multiple pixel sizes; for example, if it is necessary to expand by 1.6 pixels, based on the contour map, 100% (255) gray scale is superimposed on the first pixel of the outer edge, and 60% (153) gray scale value is superimposed on the second pixel.

[0113] The relationship between the gray-scale compensation parameter and the print size adjustment value can be obtained from the relationship curve between the gray-scale compensation parameter and the print size adjustment value, and the relationship between the gray-scale compensation parameter and the print size adjustment value can also be a discrete dot graph correspondence. For example, according to several size adjustment values, the corresponding gray-scale adjustment parameters are detected to obtain the relationship between the gray-scale compensation parameter and the print size adjustment value.

[0114] It should be noted that the size adjustment value includes but is not limited to: the specific value of size expansion or reduction, the ratio of size expansion or reduction. Those skilled in the art can understand that the relationship curves corresponding to different pixel precisions will have slight differences, but through multiple experiments, it is proved that the relationship curves corresponding to different pixel precisions are all positively correlated. To obtain the relationship curve between the gray-scale compensation parameter and the print size deviation value, specifically, it is to obtain the relationship curve corresponding to the pixel precision of the current printer's light pole.

[0115] S1502. Determine multiple size adjustment values according to the multiple slice images.

[0116] After obtaining the relationship between the gray-scale compensation parameter and the size adjustment value, it is necessary to further determine the size adjustment value and further confirm the gray-scale compensation parameter in turn. In some embodiments of the present application, the way to obtain the size adjustment value can be input by the user himself and set according to the actual needs of the user. For example. In the application embodiments, the size adjustment value can be determined by recognizing the slice image.

[0117] Generally, a slice image may include multiple slice graphics. For example, a slice image involves multiple three-dimensional models; a slice graphic may include multiple contours. For example, an outer contour and multiple inner contours. Each contour may correspond to different gray-scale compensation parameters.

[0118] In the embodiment of the present application, when identifying the slice graphics in the slice image, each slice graphic can be enveloped by multiple rectangular frames, and multiple tiles can be segmented from the slice graphic according to the rectangular frames, with each tile corresponding to a slice graphic; then, contour recognition is performed on each slice graphic, and the corresponding size adjustment value is determined according to the recognized contour.

[0119] Due to the shrinkage problem in the curing of photosensitive resin, there will be a deviation between the printed part size and the designed size. Moreover, the final shrinkage sizes are different for different Z-axis cross-sectional widths and hole diameters of the part. In the dental application case, the aperture size of the printed segmented die does not match the designed size. When the designed aperture of the part is small, the actual printed aperture is too small and the fit is too tight; when the designed aperture of the part is large, the actual printed aperture is too large and the fit is too loose, resulting in insufficient precision. Therefore, it is necessary to appropriately fine-tune the inner or outer contour of the model to compensate for the size deviation in the actual forming process. For example, assembly holes, assembly rods, assembly columns, assembly piles, and shapes with irregular mating sizes of holes and columns can all adjust the size deviation through gray compensation and gray offset.

[0120] Applying the relationship between the gray adjustment parameter and the size adjustment value to solve the size deviation problem caused by material curing shrinkage has prominent beneficial effects. The size adjustment value can be determined according to the slice image, and the specific determination method is determined according to the actual application, which is not limited in the embodiment of the present application.

[0121] S1503. Determine multiple gray compensation parameters according to the multiple size adjustment values and the relationship between the gray compensation parameter and the printed size adjustment value.

[0122] Specifically, after determining the size adjustment value, the gray compensation parameter corresponding to the size adjustment value can be determined according to the relationship curve between the size deviation value and gray supplementation.

[0123] S1504. Perform gray processing on the edge pixels of the corresponding multiple contours in each of the slice images according to the multiple gray compensation parameters, and perform 3D printing on each of the processed slice images to obtain the solid tooth.

[0124] Specifically, after performing gray processing on the edge pixels of the slice image according to the determined gray compensation parameter, performing 3D printing on the gray-processed slice image can make the printed size of the slice image better meet the actual application requirements.

[0125] In the embodiment of the present application, first, a number of size adjustment values are determined according to the sliced images, then a number of gray compensation parameters are determined according to the relationship between the number of size adjustment values and the already determined gray compensation parameters and the print size adjustment values, and then the edge pixels of the corresponding contours in the sliced images are gray-processed and 3D printed according to the number of gray compensation parameters; that is, the edge pixels of the sliced images are compensated to meet the requirements of precise size adjustment.

[0126] In another possible implementation manner of the embodiment of the present application, before 3D printing the dental implant model, an axis distance compensation can also be performed on the dental implant model to generate a corrected model of the dental implant model. In this way, the physical teeth obtained by 3D printing based on the corrected model can have higher accuracy.

[0127] Exemplarily, as Figure 16 shown, it is a schematic diagram of another possible implementation manner of S102 in the method for manufacturing a dental implant model provided by the embodiment of the present application. Figure 16 As shown, the specific steps for performing axis distance compensation on the dental implant model are shown, and this process may specifically include the following steps S1601 - S1604:

[0128] S1601. Obtain a three-dimensional surface mesh generated based on the dental implant model.

[0129] The three-dimensional surface mesh refers to the surface patches that save the three-dimensional object, and all the patches are connected to form a mesh.

[0130] It can be understood that obtaining the three-dimensional surface mesh of the dental implant model is used to obtain the surface information of the dental implant model.

[0131] S1602. Based on the three-dimensional surface mesh, determine the target surface voxels and the spatial angle information of the target surface voxels.

[0132] Among them, a voxel refers to the coordinates at a specific resolution, and such coordinates generally exist as integers, and can also be understood as a shaped rectangle in space. A surface voxel refers to the voxel obtained by rasterizing the intersection points of the light rays and the three-dimensional surface mesh during voxel sampling because the sampled object, the three-dimensional surface mesh, only saves the surface information of the three-dimensional object.

[0133] It can be understood that by processing the three-dimensional surface mesh of the entire dental implant model, surface voxels can be obtained, and for the target surface voxels among them, the spatial angle information of the target surface voxels can be obtained. By importing the three-dimensional surface mesh, the voxel resolution can be set.

[0134] Optionally, by adopting anti-aliasing rasterization, target surface voxels can be determined from a three-dimensional surface mesh. Anti-aliasing rasterization is a processing technique used to improve image clarity and reduce jagged distortions in an image. When processing a three-dimensional surface mesh, anti-aliasing rasterization can help determine target surface voxels, i.e., pixels or volume elements on the surface, thereby improving the accuracy and precision of the surface representation.

[0135] Optionally, by anti-aliasing rasterization, each surface voxel in the three-dimensional surface mesh can be smoothed to reduce jagged distortions and staircase effects. The smoothing process can be achieved through various algorithms, such as bilinear interpolation, bicubic interpolation, or Gaussian filtering. These algorithms can apply a smoothing filter to each surface voxel in the three-dimensional surface mesh to smooth the surface and reduce jagged distortions. After smoothing, the shape and position of each surface voxel will be more accurate, thereby improving the accuracy and precision of the target surface representation and helping to further improve the 3D printing processing ability of the dental implant model.

[0136] In an alternative embodiment, based on the three-dimensional surface mesh, target surface voxels and the spatial angle information of the target surface voxels are determined, including: determining target surface voxels based on the three-dimensional surface mesh and a ray, where the ray is parallel to the light source axis of the light source device, and the origin of the ray is in the same plane as the light-emitting plane of the light source device, and the light source device is used to emit curing light; determining the target mesh to which the target surface belongs in the three-dimensional surface mesh and the normal of the target mesh, where the target mesh belongs to the three-dimensional surface mesh; determining the target angle between the ray and the normal; and determining the spatial angle information based on the target angle.

[0137] It can be understood that the ray is parallel to the light source axis of the light source device. The ray can be regarded as the light emitted from the light source device. The origin of the ray is in the same plane as the light-emitting plane of the light source device. The light-emitting plane is the plane for the light source device to emit curing light. The direction of the ray is also the same as the direction of the light emitted by the light source. Through the interaction between the ray and the three-dimensional surface mesh, the target surface voxels, i.e., the surface voxels intersecting the ray, can be accurately located. After determining the target surface voxels, the target mesh in the three-dimensional surface mesh to which they belong can be further determined, which helps to describe the spatial position and attributes of the target surface voxels. Each mesh in the three-dimensional surface mesh can generate a normal, representing the direction of the mesh surface. To calculate the target angle between the ray and the normal of the target mesh, the direction and angle of the target surface voxels in space are provided as spatial angle information to assist in determining the distance compensation for 3D printing.

[0138] Optionally, expressed in a spatial coordinate system, the light source axis of the light source device is the Z-axis of the spatial coordinate system, and the light-emitting plane of the light source device is the plane composed of the XY axes. By moving a ray parallel to the positive direction of the Z-axis on the XY plane, the origin of the ray is in the XY plane, which can be expressed as (x, y, 0), where x represents the coordinate on the X-axis and y represents the coordinate on the Y-axis. Determine the intersection point z of the ray with the three-dimensional surface mesh with each (x, y, 0) as the origin to obtain the coordinates of the surface voxels of (x, y, z), where z represents the coordinate on the Z-axis, and record the normal of the three-dimensional surface mesh patch intersected by the current ray. The above-mentioned forming platform adjusts the distance in the direction of the above-mentioned Z-axis (i.e., the axis parallel to the ray).

[0139] S1603. Determine the axial distance compensation value for the distance adjustment of the forming platform to the target surface voxel based on the spatial angle information.

[0140] Among them, the forming platform is used to carry the photosensitive material cured by the light source device. The axial distance compensation value is the Z-axis distance that needs to be compensated.

[0141] It can be understood that the forming platform will gradually move upward to carry the photosensitive material cured by the light source device, and based on the spatial angle information, determine the axial distance compensation value for the distance adjustment of the target surface voxel.

[0142] In an alternative embodiment, determining the axial distance compensation value for the distance adjustment of the forming platform to the target surface voxel based on the spatial angle information includes: obtaining a predetermined angle range and determining the corresponding predetermined compensation value for the predetermined angle range; when the target angle matches the predetermined angle range, determining the predetermined compensation value as the axial distance compensation value.

[0143] It can be understood that the spatial angle information is the target angle. A predetermined angle range can be obtained, and this predetermined angle range corresponds to a predetermined compensation value. When the target angle matches the predetermined angle range, the predetermined compensation value can be determined as the axial distance compensation value. Through the above processing, according to the target angle of the target surface voxel, the axial distance compensation value for the distance adjustment of the forming platform to the target surface voxel can be determined.

[0144] Optionally, there can be multiple above-mentioned predetermined angle ranges, such as angle ranges like (0, 10), [15, 20], etc., and the Z-axis distance to be compensated for this range can be set according to specific requirements.

[0145] S1604. When there are multiple target surface voxels, generate a corrected model of the dental implant model based on the axial distance compensation values respectively corresponding to the multiple target surface voxels.

[0146] The above correction model can be used to perform slice printing processing to obtain an entity tooth with high precision.

[0147] It can be understood that a three-dimensional surface mesh can have multiple target surface voxels. By separately determining the axial distance compensation values of these surface voxels, a correction model of the dental implant model can be generated without slicing. Performing slice printing processing on the correction model only requires one slice, which can have better 3D printing efficiency compared with the related two-slice method.

[0148] In another possible implementation manner of the embodiment of the present application, when performing 3D printing, a dual-material printing method can also be adopted. For the assembly part, a wear-resistant material can be used, and for other non-assembly parts, a conventional material can be used.

[0149] Specifically, the assembly part and the non-assembly part of the dental implant model can be determined. The above assembly part can be a part associated with the abutment interface.

[0150] In the embodiment of the present application, the non-assembly part in the dental implant model at least partially surrounds the assembly part. In this way, the assembly part can be manufactured with a first material, and the non-assembly part can be manufactured with a second material. The above first material can have higher wear resistance than the second material; or, the manufactured assembly part can have higher hardness than the non-assembly part. Exemplarily, as Figure 17 shown, the non-assembly part 1702 surrounds the assembly part 1701, Figure 17 and the assembly part 1701 in

[0151] The embodiment of the present application can further improve the printing accuracy by optimizing the 3D printing process, further performing axial distance correction on the dental implant model before printing, and adopting technical means such as dual-material printing, so that the printed entity tooth can be better assembled with the metal abutment and the assembly difficulty can be reduced.

[0152] It should be noted that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. 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 embodiment of the present application.

[0153] Referring to Figure 18 , a schematic diagram of a device for manufacturing a dental implant model provided by the embodiment of the present application is shown, which may specifically include an acquisition module 1801 and a printing module 1802, where:

[0154] The acquisition module 1801 is configured to acquire a dental implant model with an abutment interface;

[0155] A printing module 1802 for manufacturing an implant model made of resin by 3D printing based on the implant model.

[0156] In a possible implementation manner of the embodiment of the present application, the printing module 1802 may specifically be used for:

[0157] Determine the assembled part and the non-assembled part of the implant model, where the assembled part is associated with the substitute interface;

[0158] Manufacture the assembled part with a first material and at least manufacture the non-assembled part with a second material, where the first material has higher wear resistance than the second material; and / or the assembled part has higher hardness than the non-assembled part.

[0159] In the embodiment of the present application, the non-assembled part at least partially surrounds the assembled part.

[0160] In a possible implementation manner of the embodiment of the present application, the substitute interface includes a threaded connection structure, and the crest width of the thread of the connection structure is 100 μm to 600 μm.

[0161] In one example, the thread profile angle of the thread is 20 degrees to 90 degrees.

[0162] In another possible implementation manner of the embodiment of the present application, the substitute interface further includes a limiting structure, and along the direction towards the connection structure, the cross-sectional area of the limiting structure gradually decreases.

[0163] In yet another possible implementation manner of the embodiment of the present application, the substitute interface further includes a hole-shaped positioning structure, and the cross-section of the positioning structure is a regular polygon.

[0164] In yet another possible implementation manner of the embodiment of the present application, the substitute interface further includes a guiding structure, the guiding structure includes a supporting surface and a guiding surface, the supporting surface is parallel to the horizontal plane, and the guiding surface is inclined to the supporting surface and is adjacent to or intersects with the supporting surface.

[0165] In the embodiment of the present application, the number of the guiding surfaces is one or two; when the number of the guiding surfaces is one, the guiding surface extends from one side of the supporting surface towards the connection structure; when the number of the guiding surfaces is two, the two guiding surfaces respectively extend from opposite sides of the supporting surface towards the connection structure.

[0166] In a possible implementation manner of the embodiment of the present application, the obtaining module 1801 may specifically be used for:

[0167] Search for a substitute model in the database that includes at least a threaded connection structure; or, establish or import a substitute model that includes at least a threaded connection structure.

[0168] Based on the substitute model, generate an implant model with a substitute interface, so that the substitute interface includes the threaded connection structure in the substitute model.

[0169] In another possible implementation manner of the embodiment of the present application, the printing module 1802 can also be used for:

[0170] Perform slicing processing on the implant model to obtain a plurality of sliced images;

[0171] Determine a plurality of size adjustment values according to the plurality of sliced images;

[0172] Determine a plurality of gray compensation parameters according to the plurality of size adjustment values and the relationship between the gray compensation parameter and the printing size adjustment value;

[0173] Perform gray processing on the edge pixels of the corresponding plurality of contours in each of the sliced images according to the plurality of gray compensation parameters, and perform 3D printing on each of the processed sliced images to obtain the implant model.

[0174] In yet another possible implementation manner of the embodiment of the present application, the printing module 1802 can also be used for:

[0175] Perform axis distance compensation on the implant model.

[0176] Exemplarily, the printing module 1802 performs axis distance compensation on the implant model, specifically including:

[0177] Obtain a three-dimensional surface mesh generated based on the implant model;

[0178] Based on the three-dimensional surface mesh, determine a target surface voxel and the spatial angle information of the target surface voxel;

[0179] Based on the spatial angle information, determine an axial distance compensation value for the forming platform to generate a distance adjustment for the target surface voxel;

[0180] In the case where there are a plurality of target surface voxels, generate a corrected model of the implant model based on the axial distance compensation values respectively corresponding to the plurality of target surface voxels, and the corrected model is used to perform slicing printing processing to obtain the implant model.

[0181] An apparatus for manufacturing an implant dental model provided by an embodiment of the present application can implement each step in the foregoing method embodiments based on the obtained implant dental model with a substitute interface for 3D printing to obtain a solid tooth with high precision.

[0182] Referring to Figure 19 , a schematic diagram of a computer device provided by an embodiment of the present application is shown. As Figure 19 shown, the computer device 1900 in the embodiment of the present application includes: a processor 1910, a memory 1920, and a computer program 1921 stored in the memory 1920 and executable on the processor 1910. When the processor 1910 executes the computer program 1921, the steps in each of the foregoing method embodiments for manufacturing an implant dental model are implemented. Alternatively, when the processor 1910 executes the computer program 1921, the functions of each module / unit in each of the foregoing apparatus embodiments are implemented, for example Figure 17 the functions of the modules 1701 to 1702 shown.

[0183] Exemplarily, the computer program 1921 can be divided into one or more modules / units, and the one or more modules / units are stored in the memory 1920 and executed by the processor 1910 to complete the present application. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and the instruction segments can be used to describe the execution process of the computer program 1921 in the computer device 1900.

[0184] The computer device 1900 can be a device capable of implementing each step in the foregoing method embodiments. For example, the computer device 1900 can be a 3D printing device, etc. The computer device 1900 can include, but is not limited to, a processor 1910 and a memory 1920. Those skilled in the art can understand that Figure 19 this is only an example of the computer device 1900 and does not constitute a limitation on the computer device 1900. It can include more or fewer components than shown, or combine certain components, or different components. For example, the computer device 1900 can also include input / output devices, network access devices, buses, etc.

[0185] The processor 1910 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.

[0186] The memory 1920 may be an internal storage unit of the computer device 1900, such as the hard disk or memory of the computer device 1900. The memory 1920 may also be an external storage device of the computer device 1900, such as a plug-in hard disk equipped on the computer device 1900, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory 1920 may also include both the internal storage unit and the external storage device of the computer device 1900. The memory 1920 is used to store the computer program 1921 and other programs and data required by the computer device 1900. The memory 1920 may also be used to temporarily store data that has been output or is to be output.

[0187] This application provides a 3D printing system, which includes: a computer device including a computer program, where when the computer program is executed, steps of obtaining an implant model with a replacement body interface are implemented; and a 3D printer configured to manufacture an implant model using resin based on the implant model.

[0188] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit the same. Although this 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 cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for manufacturing an implant dental model, characterized in that, Comprising: Obtaining an implant model with a substitute interface; Based on the implant model, manufacturing an implant model made of resin by 3D printing.

2. The method according to claim 1, wherein The manufacturing of the implant model made of resin by 3D printing based on the implant model includes: Determining an assembly part and a non-assembly part of the implant model, where the assembly part is associated with the substitute interface; Manufacturing the assembly part with a first material and at least manufacturing the non-assembly part with a second material, where the first material has higher wear resistance than the second material; and / or the assembly part has higher hardness than the non-assembly part.

3. The method according to claim 2, wherein The non-assembly part at least partially surrounds the assembly part.

4. The method according to any one of claims 1 to 3, characterized in that, The substitute interface includes a threaded connection structure, and the crest width of the thread of the connection structure is 100 μm to 600 μm.

5. The method according to claim 4, wherein The thread profile angle is 20 degrees to 90 degrees.

6. The method according to claim 4, characterized in that, The substitute interface further includes a limiting structure, and along the direction towards the connection structure, the cross-sectional area of the limiting structure gradually decreases.

7. The method according to claim 4, characterized in that, The substitute interface further includes a hole-shaped positioning structure, and the cross-section of the positioning structure is a regular polygon.

8. The method according to claim 4, wherein The substitute interface further includes a guiding structure, and the guiding structure includes a supporting surface and a guiding surface, the supporting surface is parallel to the horizontal plane, and the guiding surface is inclined to the supporting surface and is adjacent to or intersects with the supporting surface.

9. The method according to claim 8, characterized in that, The number of the guiding surfaces is one or two; when the number of the guiding surfaces is one, the guiding surface extends from one side of the supporting surface towards the connection structure; when the number of the guiding surfaces is two, the two guiding surfaces respectively extend from the opposite sides of the supporting surface towards the connection structure.

10. The method according to any one of claims 1 to 9, characterized in that The obtaining of the implant model with a substitute interface includes: Searching in a database for a substitute model including at least a threaded connection structure; or, establishing or importing a substitute model including at least a threaded connection structure; Based on the substitute model, generating an implant model with a substitute interface such that the substitute interface includes the threaded connection structure in the substitute model.

11. The method according to any one of claims 1 to 9, characterized in that, The manufacturing of the implant model made of resin by 3D printing based on the implant model further includes: Performing slicing processing on the implant model to obtain a plurality of sliced images; Determining a plurality of size adjustment values according to the plurality of sliced images; Determining a plurality of gray compensation parameters according to the relationship between the plurality of size adjustment values and the relationship between the gray compensation parameter and the printing size adjustment value; Performing gray processing on the edge pixels of the corresponding plurality of contours in each of the sliced images according to the plurality of gray compensation parameters, and performing 3D printing on each of the processed sliced images to obtain the implant model.

12. The method according to claim 11, wherein Before manufacturing the implant model made of resin by 3D printing based on the implant model, it further includes: Performing axis distance compensation on the implant model.

13. The method according to claim 12, wherein The performing of axis distance compensation on the implant model includes: Obtaining a three-dimensional surface mesh generated based on the implant model; Based on the three-dimensional surface mesh, determining a target surface voxel and the spatial angle information of the target surface voxel; Determine an axial distance compensation value for the forming platform to adjust the distance to the target surface voxel based on the spatial angle information; In the case where there are multiple target surface voxels, generate a corrected model of the dental implant model based on the axial distance compensation values respectively corresponding to the multiple target surface voxels, and the corrected model is used to perform slice printing processing to obtain the dental implant model.

14. A 3D printing system, characterized in that, Comprising: A computer device, which includes a computer program, wherein when the computer program is executed, it implements obtaining a dental implant model with a replacement body interface in the method according to any one of claims 1 to 13; And A 3D printer configured to manufacture a dental implant model using resin based on the dental implant model.

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