A digital precision attachment manufacturing method, device and readable storage medium

Abstract

The present application provides a method, device and readable storage medium for making a digital precision attachment, wherein the method includes obtaining three-dimensional data of the patient's oral cavity, designing a crown bridge according to the three-dimensional data of the patient's oral cavity, and obtaining a digital model of the crown bridge; screening the digital model of the crown bridge in the attachment database according to conditional parameters, and matching the corresponding digital model of the first part of the attachment, wherein the attachment database is pre-created; fixing the digital model of the first part of the attachment to the digital model of the crown bridge, and obtaining an attached crown bridge digital model; processing the attached crown bridge digital model through 3D printing to form an attached crown bridge object, wherein the attached crown bridge object is an integrated formation of the crown bridge and the first part of the attachment. This improves the accuracy of the precision attachment, greatly reduces the production process of the precision attachment, realizes the rapid digital production of the precision attachment, and improves the production efficiency of the precision attachment, saving costs.

Description

Technical Field

[0001] The present application relates to the technical field of dental equipment manufacturing, and more specifically, to a digital precision attachment manufacturing method, device and readable storage medium. Background Art

[0002] In the process of denture processing and manufacturing, precision attachments are required for connection and retention. Precision attachments are prefabricated attachments made by mechanical precision processing, which are usually composed of two connecting structures, a negative and a positive part (referred to as the first attachment part and the second attachment part in this scheme), wherein the first part is combined with the abutment or implant, and the second part is combined with the denture to achieve connection and retention, thereby providing retention for the denture and achieving stability and beauty of the denture. For example, the use of precision attachments can avoid the shortcomings of conventional clasp-retained removable partial denture restorations, such as poor stability, easy rotation, sinking, easy tenderness, and low chewing efficiency.

[0003] At present, in the prior art, the method of making precision attachments is as follows: scanning the three-dimensional data of the patient's oral cavity, setting the crown and the oral cavity model according to the three-dimensional data in the patient's oral cavity, then printing and processing the crown and the oral cavity model, then measuring the position of the crown, waxing, installing the precision attachment on the wax, opening the pin hole, grinding the retention groove, casting, embedding, burning and casting, and finally making the precision attachment. It can be seen that the production process of the precision attachment in the prior art is cumbersome and inefficient.

[0004] Therefore, the prior art needs to be improved. Summary of the invention

[0005] The purpose of the present application is to provide a digital precision attachment production method, device and readable storage medium, aiming to solve the technical problem in the prior art that the production of precision attachments requires multiple processes such as waxing and casting, resulting in low efficiency.

[0006] To achieve the above purpose, the technical solution adopted in this application is:

[0007] In one aspect, the present application provides a method for making a digital precision attachment, wherein the method comprises the following steps:

[0008] Obtain the patient's oral 3D data, and design the crown and bridge according to the patient's oral 3D data to obtain a crown and bridge digital model;

[0009] Combined with the crown and bridge digital model, the attachment database is screened according to conditional parameters to match the corresponding first part digital model of the attachment, wherein the attachment database is created in advance;

[0010] The digital model of the first part of the attachment is fixedly connected to the digital model of the crown and bridge, and the digital model of the attached crown and bridge is obtained;

[0011] The attached crown bridge digital model is processed by 3D printing to form an attached crown bridge object, wherein the attached crown bridge object is an integrated part of the crown bridge and the first part of the attachment.

[0012] In one embodiment, the attachment database is pre-created in the following steps:

[0013] Modeling the first part of the attachment of different stent types to form a digital model of the first part of the attachment, wherein the digital model of the first part of the attachment includes an attachment body digital model part and a local drag digital model part, and the local drag digital model part has a connection structure for matching with the second part of the attachment;

[0014] Classify according to condition parameters, establish the attachment database and form a dme file. The condition parameters include: the length, width and height of the digital model of the first part of the attachment and the connection structure shape of the local drag digital model;

[0015] Load the attachment database in the design background;

[0016] Test the first part digital models of each attachment in the attachment database according to the input design cases, and confirm the standard parameters of the first part digital models of various attachments;

[0017] A database option is loaded on the visual interface of the design software, and the database option is used to call the digital model of the first part of the attachment in the attachment database.

[0018] In one embodiment, the step of loading the attachment database in the design background includes:

[0019] Set the database ID path, where the database ID path includes: attachment visual model path, attachment addition model path, and attachment reduction model path;

[0020] The calling direction of the digital model of the first part of the attachment in the attachment database is set as the default orientation, wherein the default orientation is consistent with the common seating direction of the crown and bridge;

[0021] The relevant coordinate selection is set according to the dimensions of the digital model of the first part of the attachment, so as to realize the degree of freedom selection and rotation around the axis.

[0022] In one embodiment, in the step of setting the relevant coordinate selection according to the dimension of the digital model of the first part of the attachment, the degree of freedom selection and the rotation around the axis are realized:

[0023] Rotation around the axis includes: scaling along the X-axis, Y-axis, and Z-axis, with a maximum tilt of 40 degrees and a maximum conversion distance of 5 degrees from the surface.

[0024] In one embodiment, in the step of fixing the digital model of the first part of the attachment to the digital model of the crown and bridge, and obtaining the digital model of the attached crown and bridge:

[0025] According to the common orientation of the grinding surface of the crown and bridge digital model executed during the design, the digital model of the first part of the attachment is automatically captured and aligned;

[0026] According to the free direction, adjust the placement of the dental arch curvature of the digital model of the first part of the attachment;

[0027] The adjusted digital model of the first part of the attachment is integrated with the digital model of the crown and bridge to obtain the digital model of the attached crown and bridge.

[0028] In one embodiment, the steps of obtaining the three-dimensional data of the patient's oral cavity, designing a crown and bridge according to the three-dimensional data of the patient's oral cavity, and obtaining a digital model of the crown and bridge include:

[0029] Take an oral impression of the patient in advance and replicate the patient's oral morphology through the impression;

[0030] Obtain the patient's oral three-dimensional data by scanning the impression;

[0031] Create a digital model of the patient's oral cavity based on the patient's oral 3D data;

[0032] Create a digital model of the crown and bridge based on the contours of the patient's oral digital model.

[0033] In one embodiment, in the step of acquiring the patient's oral three-dimensional data by scanning the impression, the patient's oral three-dimensional data includes at least: implant three-dimensional data, gum three-dimensional data and tooth three-dimensional data, wherein the gum three-dimensional data is the gum three-dimensional data of the gums surrounding the missing tooth, and the tooth three-dimensional data is the tooth three-dimensional data of the teeth opposite the missing tooth.

[0034] In one embodiment, after the step of processing the attached crown bridge digital model by 3D printing to form the attached crown bridge physical object, the step further includes:

[0035] The second part of the attachment is selected to match the attached crown and bridge with the second part of the attachment, wherein the second part of the attachment is a standard part.

[0036] On the other hand, the present application also provides a device, which includes a memory, a processor, and a digital precision attachment production program stored in the memory and executable on the processor. When the digital precision attachment production program is executed by the processor, the steps of the digital precision attachment production method described above are implemented.

[0037] In a third aspect, the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a digital precision attachment production program, and when the digital precision attachment production program is executed by a processor, the steps of the digital precision attachment production method as described above are implemented.

[0038] The beneficial effects of the digital precision attachment manufacturing method, device and readable storage medium provided by the present application are at least as follows: the present application obtains the three-dimensional data of the patient's oral cavity, and designs a crown bridge according to the three-dimensional data of the patient's oral cavity, obtains a crown bridge digital model, and matches the crown bridge digital model with the patient's oral cavity three-dimensional data. The patient's oral cavity three-dimensional data can represent the actual situation in the patient's oral cavity, so that the obtained crown bridge digital model can be accurately matched with the actual situation in the patient's oral cavity. In combination with the crown bridge digital model, the first part digital model of the attachment that is suitable for the actual situation of the patient's oral cavity is screened out in the pre-set attachment database, and the first part digital model of the attachment can be fixedly connected to the crown bridge digital model in the software window, and the attached crown bridge digital model is obtained. The attached crown bridge digital model is processed by 3D printing to form an attached crown bridge object, so that the printed attached crown bridge object includes an integrated crown bridge and the first part of the attachment. Therefore, the attached crown bridge object can be directly applied to the patient's tooth repair process. This makes it possible to produce corresponding physical precision attachments according to the oral conditions of different patients, so as to improve the accuracy of precision attachments, achieve precise matching, and enhance the restoration effect of dental implants. On the other hand, it can greatly reduce the production process of precision attachments, realize the rapid digital production of precision attachments, and improve the production efficiency of precision attachments and save costs. Since the attachment database is created in advance, when designing the digital model of the first part of the attachment, it can be directly called according to the actual situation of the patient's mouth (or the patient's oral three-dimensional data), which greatly speeds up the design efficiency. In addition, the design standardization of the digital model of the first part of the attachment is achieved. Through direct calling, the design is simpler and more convenient, which greatly reduces the design difficulty. The efficiency of the tooth restoration process is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 This is a main flow chart of a method for making a digital precision attachment according to the first embodiment of the present application;

[0041] Figure 2This is a main flow chart of pre-creation of an attachment database in a digital precision attachment manufacturing method according to the first embodiment of the present application;

[0042] Figure 3 A detailed flowchart of a method for making a digital precision attachment according to the first embodiment of the present application;

[0043] Figure 4 This is a principle block diagram of a preferred embodiment of a device of Embodiment 2 of the present application;

[0044] Figure 5 A schematic diagram of a scanned impression of a method for making a digital precision attachment in Example 1 of the present application;

[0045] Figure 6 A schematic diagram of a design of a crown and bridge of a digital precision attachment manufacturing method according to the first embodiment of the present application;

[0046] Figure 7 A schematic diagram of a fixed precision attachment in a method for manufacturing a digital precision attachment in Embodiment 1 of the present application;

[0047] Figure 8 This is a structural schematic diagram of a digital model of a first part of an attachment in a method for manufacturing a digital precision attachment according to Example 1 of the present application.

[0048] Fig. 9 It is a schematic diagram of the structure of the precision attachment in the prior art when in use.

[0049] Fig.10 It is a schematic diagram of the structure of a precision attachment in the prior art during assembly and disassembly. DETAILED DESCRIPTION

[0050] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0051] like Fig. 9 , Fig.10As shown, it is a structural diagram of an existing attachment denture, which is a removable partial denture or fixed removable denture with attachment as the main retention form. It is usually connected by a precision attachment, which consists of two parts, male and female. One part (the first part of the attachment 350) is combined with the abutment (crown or crown bridge 220); the other part (the second part of the attachment 360) is combined with the removable partial denture (denture bracket 370) to provide good retention, support, stability and aesthetic effects for the denture. There are two clinical restoration schemes for this type of single-end free: the first is to implant the implant into the alveolar bone through the first implant restoration surgery, and then perform a second surgery to plan the transfer of the implant composite base to perform the restoration of the upper restoration crown. The implant restoration manufacturing process is complex, the manufacturing cycle is long, and the cost is also high. Compared with the connection design of this type of precision body and partial bracket, the design product of this device has a wider application, higher suitability, and is a more affordable choice. The second restoration method: For this type of single-end free denture, the surface of the adjacent teeth can be worn to build a bridge. The two ends of the bridge are subjected to force, which will damage the periodontal tissue of the abutment teeth and cause trauma, and fail to effectively protect the abutment teeth. Therefore, the attachment denture can reduce the torque on the abutment teeth through the joint support of double abutment teeth or multiple abutment teeth, so that the occlusal force is transmitted along the long axis of the tooth as much as possible to prevent trauma to the periodontal tissue of the abutment teeth. In addition to double abutment teeth and multiple abutment teeth, the design of the root attachment will not generate torque on the abutment teeth, and the occlusal force can be transmitted along the long axis. When the denture is subjected to force, the abutment teeth can be physiologically stimulated without causing trauma to the periodontal tissues, thereby effectively preserving the abutment teeth.

[0052] The preferred embodiment of the present application provides a method for making a digital precision attachment, such as Figure 1 As shown, a method for making a digital precision attachment, wherein the method comprises the following steps:

[0053] Step S100, obtaining the patient's oral three-dimensional data, and designing a crown and bridge according to the patient's oral three-dimensional data to obtain a crown and bridge digital model.

[0054] In the specific process, the patient's oral three-dimensional data can be obtained by 3D scanning. The patient's oral three-dimensional data at least includes: periodontal tissue three-dimensional data, gum three-dimensional data and tooth three-dimensional data, wherein the gum three-dimensional data is the gum three-dimensional data of the gums around the missing teeth, and the tooth three-dimensional data is the tooth three-dimensional data of the teeth opposite the missing teeth. The patient's oral three-dimensional data can be visualized in the software, so that the designer can fully and accurately see the actual situation of the patient's oral cavity on the screen. For example, by scanning an impression (such as Figure 5 The three-dimensional data of the patient's oral cavity is obtained by normal flipping, and after the scan data is imported, it is used to create a digital model design of the periodontal, crown and gums contained in the acquired three-dimensional data.

[0055] In this embodiment, scanning the impression to obtain the three-dimensional data of the patient's oral cavity is taken as an example, so that a digital model can be formed on the display interface of the software, and the actual situation in the patient's oral cavity can be simulated through the digital model.

[0056] like Figure 2 As shown, step S100 specifically includes the following steps:

[0057] Step S110: Make an oral impression of the patient in advance, and replicate the oral shape of the patient through the impression, so that an outer contour shape is formed on the impression film, and the outer contour shape matches the outer contour of the teeth in the patient's oral cavity in both positive and negative directions.

[0058] Step S120: Obtain the patient's oral 3D data by scanning the impression. Scan the impression with a 3Shape oral 3D scanner (such as Figure 5 ) to obtain the impression scanning data, so that the shape of the physical impression film can be digitized.

[0059] Step S130: Create a digital model of the patient's oral cavity 100 (eg, Figure 6 The impression scan data is restored into a digital model of the patient's oral cavity through the 3Shape oral 3D scanner (the digital model of the patient's oral cavity and the patient's oral 3D data are in a corresponding positive and negative relationship, which can be understood as a mold and a plaster mold formed in the mold. The digital model of the patient's oral cavity is a digitized shape that is proportional to the tooth shape and other structures in the patient's oral cavity). After the impression is scanned by the 3Shape warehouse, the software will automatically flip the data so that the patient's oral 3D data scanned by the impression is restored to the form of a digital model of the oral cavity.

[0060] Step S140: Create a crown and bridge digital model according to the outline of the patient's oral digital model. In the software visualization interface, a crown and bridge structure matching the outline of the patient's oral digital model is designed to obtain a crown and bridge digital model 200 (such as Figure 6 For example, the crown and bridge design can be performed in 3Shape software to obtain a dental crown and bridge digital model 200.

[0061] Step S200: Combine the crown and bridge digital model and filter the attachment database according to the condition parameters to match the corresponding first attachment digital model 300 (such as Figure 8 As shown), where the attachment database is created in advance.

[0062] In the specific process, according to the digital model of the crown and bridge and the actual situation in the patient's oral cavity, two adjacent crowns can be detected by an optical measuring instrument to obtain the data of the two adjacent crowns. According to the data of the two adjacent crowns, a digital model of the precision attachment can be made by 3D modeling software, and then the digital model of the precision attachment can be inserted into the digital model of the oral cavity so that the digital model of the precision attachment is parallel to the direction of insertion of the crown and bridge.

[0063] Alternatively, the designed digital model of the precision attachment may be saved as a database. After the digital model of the crown and bridge is designed, the database may be directly matched and called according to the relevant conditions (condition parameters) in the patient's oral cavity to directly generate a matching digital model of the precision attachment 300 (e.g. Figure 6 and Figure 7 For example: Figure 3 As shown, the attachment database in step S200 is pre-created and specifically includes the following steps:

[0064] Step S210, modeling the first part of the attachment of different stent types to form a digital model 310 of the first part of the attachment, wherein the digital model 310 of the first part of the attachment includes an attachment body digital model part and a local support digital model part, and the local support digital model part 320 has a digital model for connecting with the second part 360 of the attachment (such as Fig. 9 , Fig.10 As shown) matching connection structure.

[0065] like Fig. 9 , Fig.10 As shown, the precision attachments have uniform male and female structures and are finished metal parts. The two parts of the attachment fit very well after the denture is in place. Usually, one part of the attachment structure 350 can be fixed to the mesial or distal surface of the crown of the abutment tooth (on the crown bridge 220) by welding, bonding or physical retention methods, while the other part of the structure is placed on the denture bracket 370 in the edentulous area (connecting the denture). Therefore, the male part (the second part of the attachment 360) adopts a labeled structure, while the female part (the first part of the attachment) needs to be designed according to the patient's dental conditions. In this embodiment, only a digital model of the first part of the attachment needs to be established, and various digital models of the first part of the attachment are connected in series to establish a database. Figure 8 As shown, the database contains a structure drawing (stp) file of the digital model 300 of the first part of the attachment.

[0066] In addition, if Figure 8As shown, the digital model of the first part of the attachment (the cathode part of the precision body) mainly includes two parts, one part is the digital model part 310 of the attachment body used to connect with the crown bridge, and the local drag digital model part 320 connected to the digital model part of the attachment body, the local drag digital model part is used to match with the second part of the attachment to form a locking lock type structure, and the locking lock type structure is detachable. The local drag digital model part has a connecting structure, specifically a ring-shaped structure designed in the middle of the local drag digital model part, which just forms a fixed pattern with the second part of the attachment (metal anode) connected to the steel support local support, and is detachably connected to the local drag through the second part of the attachment; after the female (first part of the attachment) and the male structure (second part of the attachment) of the precision attachment are combined, the axial buccal and lingual directions of the precision attachment are fixed by the positioning pin to form a retention force, so that the crown bridge and the denture are connected through the precision attachment.

[0067] Step S220, classify according to condition parameters, establish an attachment database and form a dme file, the condition parameters include: the length, width, height dimensions of the digital model of the first part of the attachment and the connection structure shape of the local drag digital model part.

[0068] like Figure 8As shown, in the specific process, the digital model of the first part of the attachment is classified according to different parameter conditions, so that the digital model of the first part of the attachment in the database is classified according to different parameters, so that the subsequent call of the digital model of the first part of the attachment can be facilitated. For example, by inputting different heights (the height of the digital model part of the attachment body of the digital model of the first part of the attachment), it is matched and connected with the first part of the attachment, thereby laying the foundation for the connection and strength with the second part. According to the principle of mechanics, the height of the rectangular cross-section beam of the precision attachment (the overall height of the digital model part of the attachment body + the local digital model part) is doubled, and the bearing capacity of the beam is increased by 4 times, and the width (the width of the digital model part of the attachment body) is doubled, and the bearing capacity is increased by 2 times. Therefore, the contact area height of the precision attachment crown bridge can be set to 7.59mm, the width is set to 3.26mm, and the length (the length of the digital model part of the attachment body + the length of the local digital model part) is set to 8.19mm, so that a unified standard can be used for design to ensure the stability of the precision attachment. This type of design is suitable for a single-ended free local support digital model. The length of the precision attachment is to connect the second part of the local support digital model with the locked anode part to eliminate the lever force transmitted by the balanced bite force. In order to offset the bite force, the strength of the precision attachment body and the local support conforms to the mechanical principles and the physical properties of the material, which determine the numerical size of the precision body structure. Therefore, in this solution, the conditional parameters for screening the database can be designed to include: the length, width, and height of the digital model of the first part of the attachment and the connection structure shape of the local support model. Therefore, based on these parameters, the digital model of the first part of the attachment that matches the patient's mouth or the designed crown bridge can be directly selected from the database.

[0069] Step S230: Load the attachment database in the design background.

[0070] In a specific process, the attachment database is loaded on the control panel of the design software, so that the database is loaded into the design software, thereby directly forming a virtual three-dimensional data module through relevant calls on the control panel.

[0071] Step S230 specifically includes the following steps:

[0072] Step S231, setting the database ID path, wherein the database ID path includes: attachment visual model path, attachment adding model path, and attachment reducing model path.

[0073] Set the database ID path: accessory visual model path, accessory addition model path, (MK1 precision body is the addition function) accessory reduction model path (retention hole opening function is reduction).

[0074] Step S232: setting the retrieved direction of the digital model of the first part of the attachment in the attachment database as a default orientation, wherein the default orientation is consistent with the common seating direction of the crown and bridge.

[0075] In the specific process, you can directly set the default orientation. The default orientation is the direction in which the crown and bridge are set to the digital model of the patient's oral cavity (the direction of the common seating path). When designing the crown (crown and bridge), the restoration is built according to the manufacturing method of the sleeve crown, so that the grinding surface of the common seating path can be formed.

[0076] Step S233, setting relevant coordinate selection according to the dimension of the digital model of the first part of the attachment, realizing the degree of freedom selection and rotation around the axis.

[0077] The rotation around the axis includes: scaling along the X-axis, Y-axis, and Z-axis, with a maximum inclination of 40 degrees and a maximum conversion distance of 5 degrees from the surface. It realizes automatic capture and alignment according to the common positioning direction of the grinding surface of the sleeve crown during design, and the arch arc placement can be fine-tuned according to the free direction. It greatly improves the precision grinding degree of precision attachments and executes the design, without the need for manual visual observation and alignment, reducing the accuracy factors caused by human factors.

[0078] Step S240: testing the first part digital models of each attachment in the attachment database according to the input design case, and confirming the standard parameters of the first part digital models of each type of attachment.

[0079] In the specific process, through a large amount of data testing on the design cases and the feasibility of clinical data acceptance, the precision assembly design parameters that are suitable for matching and connecting with the stent are selected, and the unique standard parameters of various types of precision attachments are confirmed. In this way, a standardized model can be formed for each type of precision attachment, and a set of conditional parameters can be directly input when calling, so that a standardized digital model of the first part of the attachment that is close to (or the same as) the set of conditional parameters can be matched. This makes the database more standardized and efficient during use.

[0080] Step S250: loading a database option on the visual interface of the design software, wherein the database option is used to call the digital model of the first part of the attachment in the attachment database.

[0081] By selecting conditional parameters in the database options in the visual interface, the digital model of the first part of the matching attachment can be directly called out, greatly improving the design efficiency.

[0082] like Figure 1 , Figure 2As shown, in step S300, the digital model of the first part of the attachment is fixedly connected to the digital model of the crown and bridge, and the digital model of the attached crown and bridge is obtained.

[0083] like Figure 7 , Figure 8 As shown, in the visual interface of the software, the attachment body digital model part 310 of the first part digital model 300 of the attachment can be directly pressed against and fixed to one side of the crown and bridge digital model 200 (tooth crown), so that the two models are merged into an attachment crown and bridge digital model.

[0084] Step S300 specifically includes the following steps:

[0085] Step S310: Automatically capture and align the digital model of the first part of the attachment according to the common positioning direction of the grinding surface of the digital model of the crown and bridge executed during the design.

[0086] Step S320: adjusting the placement of the dental arch curvature of the digital model of the first part of the attachment according to the free direction.

[0087] Step S330: The adjusted digital model of the first part of the attachment is integrated with the digital model of the crown and bridge to obtain a digital model of the attached crown and bridge.

[0088] Since the attachment database is created in advance, when designing the digital model of the first part of the attachment, it can be directly called according to the actual situation of the patient's oral cavity (or the patient's oral 3D data), which greatly speeds up the design efficiency. In addition, the design standardization of the digital model of the first part of the attachment is realized. Through direct calling, the design is simpler and more convenient, which greatly reduces the design difficulty. It greatly improves the efficiency of the tooth restoration process.

[0089] like Figure 1 , Figure 2 As shown, in step S400, the attached dental crown bridge digital model is processed by 3D printing to form an attached dental crown bridge object, wherein the attached dental crown bridge object is an integrated structure of the dental crown bridge and the first part of the attachment.

[0090] In the specific process, the attached crown bridge is formed into a physical object according to the printing and processing of the digital model of the fine attached crown bridge, that is, the attached crown bridge digital model is formed into an attached crown bridge digital model through 3D printing. The crown bridge in the physical object is directly fixed in the patient's mouth and cannot be moved. The denture (denture bracket) with the second part of the attachment can be detachably connected through the first part of the attachment, so that the fixed connection between the denture and the crown (crown bridge) can be directly achieved.

[0091] like Figure 1 , Figure 2As shown, step S500, selecting the physical object of the second part of the attachment, so that the physical object of the attached crown bridge is matched with the physical object of the second part of the attachment, wherein the physical object of the second part of the attachment is a standard part.

[0092] The precision attachment in this embodiment is applicable to various types of edentulous conditions as follows:

[0093] When designing the restoration of Kennedy Class I and II dentition defects, since there is no abutment tooth in the distal part, the denture will tilt and swing when it is subjected to occlusal force, which will have an adverse effect on the long-term effect of the denture. If an attachment denture is selected, the appropriate attachment can be selected as a retainer according to the tooth body of the adjacent teeth, periodontal conditions, the number of edentulous areas and the conditions of soft and hard tissues to provide retention and disperse the occlusal force. The artificial teeth can be reduced in diameter, reduced in number, and the number of abutment teeth can be increased. Rigid or elastic attachments can be selected according to periodontal conditions to protect the oral soft and hard tissues and achieve better long-term effects.

[0094] When designing the restoration of Kennedy Class III and IV dentition defects, removable dentures, fixed dentures, implant dentures, or attachment dentures can be selected based on the number of missing teeth, the conditions of the alveolar ridges in the edentulous area, and the conditions of the periodontal tissues of the abutment teeth. When the abutment teeth lack a common path of insertion and a fixed denture is required, the common path of insertion can be obtained through attachment design. During chewing, the occlusal force is transmitted to the abutment teeth through the bridge, and the support form of the denture is consistent with that of the fixed denture.

[0095] When repairing edentulous teeth, attachments can be selected as the retainers of the dentures after implant placement. Clinically, high and wide alveolar ridges have good retention, stability and support for dentures. However, when the alveolar ridge is narrow and low, the retention and stability of the dentures are poor, and the function after repair is poor. If attachments for implant retention are added, the retention of the dentures will be significantly improved.

[0096] In this embodiment, the crown bridge and the first part of the attachment are integrally formed, which has the following effects:

[0097] 1. The first part of the attachment and the second part of the attachment are connected by a snap-lock type rigid and precise fixed connection, which connects the later welding of the port of the local steel support + the series connection of the key lock type mechanical principle to form a fixed + movable combined device. The design of this device can retain the patient's original denture without damaging the abutment teeth. The design product of this device has a wider application, higher suitability, and is a more affordable choice.

[0098] 2. Good retention and stability. If the clasp retainer connection method is adopted, the clasp retainer uses the clasp arm to enter the concave area of ​​the abutment tooth, and the friction between the clasp and the natural tooth is generated during the removal and wearing to provide the retention of the denture. As the number of times the denture is repeatedly removed and worn increases, the metal clasp will become fatigued, and the retention force of the clasp will be significantly reduced. However, the attachment denture is realized by connecting the denture with this precision attachment, and the retention force is generated by combining the female structure (the first part of the attachment) and the male structure (the second part of the attachment) of the attachment. The retention force will not decrease significantly with the increase in the number of removal and wearing. After the denture is worn for a long time, the retention force of the denture decreases due to the wear of the female and male parts. The retention force of the denture can also be restored by replacing or adjusting the attachment, and it can be reused. When the attachment is used, in addition to having a good retention effect after the restoration is in place, its stability effect is also very good. For example, in the repair of bilateral free loss, the stability of the attachment denture is significantly better than that of the clasp-retained denture. When elastic attachment is used, due to the effect of the attachment, when the free end of the denture is forced to sink, the abutment tooth is not subjected to obvious torque, and the denture can still achieve a good stability effect.

[0099] 3. It is conducive to the preservation of abutment teeth. Attachment dentures can reduce the torque on the abutment teeth through the joint support of double abutment teeth or multiple abutment teeth, so that the occlusal force is transmitted along the long axis of the tooth as much as possible, preventing trauma to the periodontal tissue of the abutment teeth. In addition to double abutment teeth and multiple abutment teeth, the design of the root surface attachment will not generate torque on the abutment teeth, and the occlusal force can be transmitted along the long axis. When the denture is under force, the abutment teeth can be physiologically stimulated without causing trauma to the periodontal tissue, so the abutment teeth can be effectively preserved.

[0100] 4. High chewing efficiency. Domestic and foreign scholars have conducted experimental research on the chewing efficiency of attachment dentures after restoration of dentition defects, and confirmed that compared with clasp-retained dentures, attachment dentures can improve patients' chewing efficiency. The restoration has good support, stability and retention effects, which can restore the patient's chewing efficiency to a state close to that of natural teeth.

[0101] 5. Good aesthetic effect. The attachment is usually placed on the mesial, distal or root surface of the abutment tooth. From the appearance, there is no metal exposure and it does not affect the aesthetics of the denture. If the natural tooth has a change in shape or color, the tooth can be restored with a porcelain crown to achieve a beautiful effect.

[0102] 6. High production precision is required, and the cathode and anode must be matched with high precision.

[0103] Embodiment 2

[0104] In addition, in order to achieve the above purpose, based on the above digital precision attachment manufacturing method, the present application also provides a device, such as Figure 4 As shown, the device includes a processor 10 , a memory 20 and a display 30 . Figure 3Only some of the components of the device are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0105] In some embodiments, the memory 20 may be an internal storage unit of the device, such as a hard disk or memory of the device. In other embodiments, the memory 20 may also be an external storage device of the device, such as a plug-in hard disk equipped on the device, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. Furthermore, the memory 20 may also include both an internal storage unit of the device and an external storage device. The memory 20 is used to store application software and various types of data installed in the device, such as program codes for installing the device. The memory 20 can also be used to temporarily store data that has been output or is to be output. In one embodiment, a digital precision attachment production program 40 is stored on the memory 20, and the digital precision attachment production program 40 can be executed by the processor 10, thereby realizing the digital precision attachment production method in the present application.

[0106] In some embodiments, the processor 10 may be a central processing unit (CPU), a microprocessor or other data processing chip, which is used to run program codes or process data stored in the memory 20, such as executing a digital precision attachment manufacturing method.

[0107] In some embodiments, the display 30 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 30 is used to display information on the device and to display a visual user interface. The components 10-30 of the device communicate with each other via a system bus.

[0108] When the processor 10 executes the digital precision attachment manufacturing program 40 in the memory 20, the steps of the digital precision attachment manufacturing method in the first embodiment are implemented, which mainly include the following steps:

[0109] The patient's oral three-dimensional data is obtained, and the crown and bridge are designed according to the patient's oral three-dimensional data to obtain a crown and bridge digital model.

[0110] In combination with the digital model of the dental crown and bridge, the attachment database is screened according to conditional parameters to match the corresponding digital model of the first part of the attachment, wherein the attachment database is created in advance.

[0111] The digital model of the first part of the attachment is fixedly connected to the digital model of the crown and bridge, and the digital model of the attached crown and bridge is obtained.

[0112] The attached dental crown bridge digital model is processed by 3D printing to form an attached dental crown bridge object, wherein the attached dental crown bridge object is an integrated structure of the dental crown bridge and the first part of the attachment.

[0113] Embodiment 3

[0114] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores an optimization program for the production of digital precision attachments, and when the optimization program for the production of digital precision attachments is executed by a processor, the steps of the optimization method for the production of digital precision attachments as described above are implemented.

[0115] In summary, the present application provides a method, device and readable storage medium for making a digital precision attachment, wherein the present application obtains the three-dimensional data of the patient's oral cavity, designs a crown bridge according to the three-dimensional data of the patient's oral cavity, obtains a digital model of the crown bridge, matches the digital model of the crown bridge with the three-dimensional data of the patient's oral cavity, and the three-dimensional data of the patient's oral cavity can represent the actual situation in the patient's oral cavity, so that the obtained digital model of the crown bridge can be accurately matched with the actual situation in the patient's oral cavity. In combination with the digital model of the crown bridge, a digital model of the first part of the attachment suitable for the actual situation of the patient's oral cavity is screened out in a pre-set attachment database, and the digital model of the first part of the attachment can be fixedly connected to the digital model of the crown bridge in the software window, and an attached crown bridge digital model is obtained. The attached crown bridge digital model is processed by 3D printing to form an attached crown bridge object, so that the printed attached crown bridge object includes an integrated crown bridge and the first part of the attachment. Thereby, the attached crown bridge object can be directly applied to the patient's tooth repair process. This makes it possible to produce corresponding physical precision attachments according to the oral conditions of different patients, so as to improve the accuracy of precision attachments, achieve precise matching, and enhance the restoration effect of dental implants. On the other hand, it can greatly reduce the production process of precision attachments, realize the rapid digital production of precision attachments, and improve the production efficiency of precision attachments and save costs. Since the attachment database is created in advance, when designing the digital model of the first part of the attachment, it can be directly called according to the actual situation of the patient's mouth (or the patient's oral three-dimensional data), which greatly speeds up the design efficiency. In addition, the design standardization of the digital model of the first part of the attachment is achieved. Through direct calling, the design is simpler and more convenient, which greatly reduces the design difficulty. The efficiency of the tooth restoration process is greatly improved.

[0116] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for making a digital precision attachment, characterized in that: The method comprises the following steps: Obtain the patient's oral 3D data, and design the crown and bridge according to the patient's oral 3D data to obtain the crown and bridge digital model; In combination with the digital model of the dental crown and bridge, screening is performed in the attachment database according to conditional parameters to match the corresponding digital model of the first part of the attachment, wherein the attachment database is created in advance; The digital model of the first part of the attachment is fixedly connected to the digital model of the crown and bridge, and the digital model of the attached crown and bridge is obtained; Processing the attached dental crown bridge digital model through 3D printing to form an attached dental crown bridge object, wherein the attached dental crown bridge object is an integrated structure of the dental crown bridge and the first part of the attachment; The attachment database is pre-created in the following steps: Modeling the first part of the attachment of different stent types to form a digital model of the first part of the attachment, wherein the digital model of the first part of the attachment includes an attachment body digital model part and a local extension digital model part, and the local extension digital model part has a connection structure for matching with the second part of the attachment; Classify according to the condition parameters, establish the attachment database and form a dme file, the condition parameters include: the length, width and height of the digital model of the first part of the attachment and the connection structure shape of the local drag digital model; The attachment database is loaded in the design background, which includes: setting a database ID path, wherein the database ID path includes: an attachment visual model path, an attachment addition model path, and an attachment reduction model path; setting the call-out direction of the first part digital model of the attachment in the attachment database to a default orientation, wherein the default orientation is consistent with the common placement path direction of the crown and bridge; setting relevant coordinate selection according to the placement dimension of the first part digital model of the attachment to achieve degree of freedom selection and rotation around the axis, wherein the rotation around the axis includes: scaling along the X-axis, Y-axis, and Z-axis directions, wherein the maximum inclination is 40 degrees, and the maximum distance from the surface conversion is 5 degrees; Testing the first part digital models of various attachments in the attachment database according to the input design cases, and confirming the standard parameters of the first part digital models of various attachments; A database option is loaded on a visual interface of the design software, wherein the database option is used to call a digital model of the first part of the attachment in an attachment database.

2. The method for making a digital precision attachment according to claim 1, characterized in that: In the step of fixing the digital model of the first part of the attachment to the digital model of the crown and bridge, and obtaining the digital model of the attached crown and bridge: According to the common orientation of the grinding surface of the crown and bridge digital model executed during the design, the digital model of the first part of the attachment is automatically captured and aligned; According to the free direction, adjust the placement of the dental arch curvature of the digital model of the first part of the attachment; The adjusted digital model of the first part of the attachment is integrated with the digital model of the dental crown and bridge to obtain a digital model of the attached dental crown and bridge.

3. The method for making a digital precision attachment according to claim 1, characterized in that: The steps of obtaining the patient's oral three-dimensional data, designing a crown and bridge according to the patient's oral three-dimensional data, and obtaining a crown and bridge digital model include: Take an oral impression of the patient in advance and replicate the patient's oral morphology through the impression; Obtain the patient's oral three-dimensional data by scanning the impression; Creating a digital model of the patient's oral cavity based on the patient's oral three-dimensional data; A dental crown and bridge digital model is created based on the outer contour of the patient's oral digital model.

4. The method for making a digital precision attachment according to claim 3, characterized in that: In the step of acquiring the patient's oral three-dimensional data by scanning the impression, the patient's oral three-dimensional data at least includes: implant three-dimensional data, gum three-dimensional data and tooth three-dimensional data, wherein the gum three-dimensional data is the gum three-dimensional data of the gums surrounding the missing tooth, and the tooth three-dimensional data is the tooth three-dimensional data of the teeth opposing the missing tooth.

5. The method for making a digital precision attachment according to claim 1, characterized in that: After the step of processing the attached dental crown bridge digital model into an attached dental crown bridge object through 3D printing, the step further includes: The second part of the attachment is selected to match the attached crown bridge with the second part of the attachment, wherein the second part of the attachment is a standard part.

6. A device, characterized in that: The device includes a memory, a processor, and a digital precision attachment production program stored in the memory and executable on the processor. When the digital precision attachment production program is executed by the processor, the steps of the digital precision attachment production method according to any one of claims 1 to 5 are implemented.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a digital precision attachment production program, and when the digital precision attachment production program is executed by a processor, the steps of the digital precision attachment production method according to any one of claims 1 to 5 are implemented.

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