Manufacturing method of orthodontic bracket positioning and mounting module and bracket positioning and mounting module

Abstract

The embodiment of the invention relates to the field of medical instrument manufacturing, and discloses a manufacturing method of an orthodontic bracket positioning and mounting module and the orthodontic bracket positioning and mounting module obtained according to the method. The manufacturing method comprises the following steps: a model design step: adding a bracket model at a preset position on a digital dental model by using a computer system to form a digital composite model; a prototype printing step: importing the digital composite model into printing equipment, and printing to generate a prototype entity with a bracket shape; the prototype entity is covered with a prefabricated positioning guide plate, the positioning guide plate comprises a plurality of sub-guide plates, and each sub-guide plate corresponds to at least one tooth; an auxiliary layer manufacturing step: filling a gap between the positioning guide plate and the prototype entity upper bracket with liquid silica gel to form an auxiliary layer, and taking down the positioning guide plate with the auxiliary layer after the liquid silica gel is cured; and an assembling step: loading the bracket accessory into the groove of the positioning guide plate with the auxiliary layer to form the positioning mounting template with the bracket.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of medical instrument manufacturing, in particular to a manufacturing method of an orthodontic bracket positioning and installing module and the bracket positioning and installing module. BACKGROUND

[0002] In the orthodontic treatment process, brackets are generally needed to be bonded on the teeth of a patient, and then an arch wire is passed through the slot of the bracket to move the teeth. The position of the bracket on the teeth also has a certain requirement, and the doctor needs to accurately position the bracket. If the bonding position of the bracket is incorrect, it has a great influence on the treatment effect, and inaccurate positioning will lead to poor treatment effect of the patient, prolong the treatment cycle, etc. At present, the common bracket installation method mainly relies on the clinical experience of the doctor, and the brackets are bonded on the surface of the teeth of the patient by naked eye observation, which has a long operation time and a large error.

[0003] In order to save the treatment time of the doctor, improve the clinical bonding efficiency, and obtain high-precision bracket positioning, a customized bracket installation template is used, which can position the bracket to the specific position of the corresponding tooth by wearing the installation template on the teeth of the patient. After the bonding is completed, the template is removed. However, the manufacturing process of the bracket installation template is relatively complex, and the original type which is consistent with the arrangement of the teeth of the patient needs to be first manufactured, then the brackets are manually installed on the original type by the doctor, and then the pre-manufactured guide plate is sleeved on the original type, so that the position of the bracket is copied to the guide plate. Then, the bracket needs to be detached from the original type and installed in the guide plate to form a set of installation template.

[0004] It can be seen that, in the manufacturing of the above bracket installation template, the bracket needs to be first bonded on the original type and then detached, and the bracket bottom plate is coated with adhesive during bonding. Although the bracket bottom plate is cleaned after bonding, the pollution still cannot be avoided, which affects the cleanliness of the bracket bottom plate when it is finally bonded on the surface of the teeth of the patient. Moreover, there are many manual processes in the whole process, which is not conducive to batch production and has a high cost. SUMMARY

[0005] The embodiment of the present application aims to provide a manufacturing method of an orthodontic bracket positioning and installing module and the bracket positioning and installing module, which can reduce the secondary pollution of the bracket during the manufacturing process of the bracket installation template, simplify the process, shorten the manufacturing period, and improve the precision.

[0006] To solve the above technical problems, the embodiment of the present application provides a manufacturing method of an orthodontic bracket positioning and mounting module, comprising: a model design step: adding a bracket model on a predetermined position on a digital dental model using a computer system to form a digital composite model; a prototype printing step: importing the digital composite model into a printing device to print a prototype entity with a bracket shape; a guide plate initial positioning step: covering a prefabricated positioning guide plate on the prototype entity, the positioning guide plate comprising a plurality of sub-guide plates, each sub-guide plate corresponding to at least one tooth, wherein the part of the sub-guide plate corresponding to a single tooth is respectively provided with a positioning part corresponding to the occlusal side and the labial side of the tooth, the sub-guide plate is positioned with the tooth on the corresponding part of the prototype entity through the positioning part, and the part of the sub-guide plate corresponding to each tooth has a recess on the side facing the labial side of the tooth for accommodating the bracket part on the prototype entity; an auxiliary layer manufacturing step: filling the gap between the positioning guide plate and the bracket on the prototype entity with liquid silicone to form an auxiliary layer, and taking down the positioning guide plate with the auxiliary layer after the liquid silicone is solidified; and an assembling step: assembling the bracket accessory into the recess of the positioning guide plate with the auxiliary layer to form a bracket positioning and mounting template.

[0007] The embodiment of the present application also provides an orthodontic bracket positioning and mounting module obtained according to the manufacturing method of the orthodontic bracket positioning and mounting module.

[0008] The manufacturing method of the orthodontic bracket positioning and mounting module in the embodiment of the present application solves the problems of secondary pollution of the bracket, complex process and the like in the manufacturing process of the bracket mounting template, changes the manufacturing process, designs the bracket on the digital model in the model design stage, so that the printed prototype not only carries the bracket shape, but also the positions of the bracket and the tooth are predetermined in the design, thereby avoiding the error of manual pasting. The positioning part is arranged at the position of the tooth corresponding to the guide plate, and the recess is arranged at the position of the bracket corresponding to the guide plate, then the guide plate is covered on the prototype entity in imitation of the tooth wearing process, the recess accommodates the bracket on the prototype, the positions of the guide plate and the tooth are relatively fixed, at this time, the remaining gap in the recess is filled with liquid silicone to position the assembly position of the bracket. It can be seen that the manufacturing method in the embodiment of the present application designs the digital bracket model on the digital dental model, completes the positioning of the bracket in the digital design stage, avoids subsequent positioning by using the bracket entity, not only can reduce the secondary pollution of the bracket, but also can avoid the pollution of the bottom surface of the bracket, simplify the process and improve the precision.

[0009] In addition, the predetermined position is specified by a designer or automatically generated by a computer. When specified by a person, the selection of the predetermined position is more flexible, and when automatically generated by a computer, the determination of the bracket mounting position is more convenient and the degree of automation is improved.

[0010] In addition, the predetermined position includes a labial-buccal center position or a clinical crown center position of the tooth. Defining the specific available predetermined position facilitates automatic identification of the predetermined position and facilitates addition, and makes the position selection universal and applicable to teeth of different tooth positions.

[0011] In addition, the prefabricated positioning guide plate is made by the following steps: a digital model of the positioning guide plate is designed in advance according to the dental model of the patient and the positioning position of the bracket, the digital model of the positioning guide plate is printed, and the entity of the positioning guide plate is obtained. The prefabrication method of the positioning guide plate is limited in this embodiment, and the positioning guide plate can be designed individually, so that the positioning guide plate is more fitted to the tooth after being made, and the positioning of the covered tooth is more accurate.

[0012] In addition, the digital model of the positioning guide plate is designed in advance according to the dental model of the patient and the positioning position of the bracket, including: respectively designing an occlusal surface positioning subpart and a labial-buccal side positioning subpart, or respectively designing an occlusal surface positioning subpart and a lingual side positioning subpart, wherein the occlusal surface positioning subpart matches the occlusal surface contour of the corresponding tooth, the labial-buccal side positioning subpart matches the labial-buccal surface contour of the corresponding tooth on the side close to the tooth surface, and the lingual side positioning subpart matches the labial-buccal surface contour of the corresponding tooth on the side close to the tooth surface. In this embodiment, two directions of positioning are used respectively when designing the positioning guide plate, specifically the occlusal side and the labial-buccal side, the occlusal side and the lingual side, and positioning from two directions makes the positioning of the positioning guide plate and the tooth more stable.

[0013] In addition, the model design step includes: adding a glue layer with a preset thickness between the bracket model and the tooth surface; and the groove in the sub-guide plate is used to accommodate the bracket part on the prototype entity and the glue layer with the preset thickness. Since the bracket needs to be coated with adhesive by the doctor when installed, and the thickness of the adhesive also affects the position of the bracket in three-dimensional space, the embodiment adds a glue layer with a preset thickness in the process of model design, so that the installation template reserves a predetermined glue layer thickness when worn on the patient's teeth, which facilitates the doctor to limit the amount of adhesive applied, and makes the final formed bracket position more consistent with the designed position.

[0014] In addition, the design of the digital model of the positioning guide plate comprises: setting a weak connection structure between two adjacent sub-guide plates; and the printing of the digital model of the positioning guide plate to obtain the entity of the positioning guide plate comprises: printing the digital model of the positioning guide plate with the weak connection structure to obtain the entity of the positioning guide plate with the weak connection structure. Since the guide plate is usually made by using a 3D printing process, the overall manufacturing can ensure the accuracy of the size and relative position, but the integrated mounting guide plate is not conducive to wearing due to the misalignment of teeth when wearing. Therefore, in this embodiment, the weak connection structure is set between the sub-guide plates, so that the weak connection structure can be damaged when needed, forming a partially split structure and realizing the mutual separation of the sub-guide plates, thereby facilitating the doctor to wear for the patient.

[0015] In addition, if the sub-guide plate corresponds to a plurality of teeth, the design of the digital model of the positioning guide plate comprises: setting a weak connection structure for the part of the sub-guide plate corresponding to the interproximal space. Similarly, the weak connection structure is also designed in the middle of the sub-guide plate, which takes into account the accuracy and convenience of manufacturing the sub-guide plate and the convenience of wearing.

[0016] In addition, the part of each sub-guide plate corresponding to a single tooth in the mesial-distal direction has a width greater than or equal to two-thirds of the width of the corresponding tooth in the mesial-distal direction. Since a positioning part that is too narrow is not conducive to stable positioning, the width of the sub-guide plate corresponding to each tooth is limited to be greater than or equal to two-thirds in this embodiment, thereby ensuring the relative stability during positioning.

[0017] In addition, the bracket model has a plurality of types; and the model design step comprises: selecting a bracket model according to the tooth position of the bracket and adding the bracket model to the digital dental model. Since the sizes of the tooth surfaces of different tooth positions are different and the orthodontic needs may also be different, the bracket model is limited to have a plurality of types, and different types of bracket models are selected according to needs during design, which is conducive to meeting different tooth positions and different orthodontic needs. BRIEF DESCRIPTION OF DRAWINGS

[0018] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, which do not constitute a limitation on the embodiments, and the elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified, and the drawings do not constitute a proportional limitation.

[0019] Figure 1 is a flowchart of a manufacturing method of an orthodontic bracket positioning and mounting module according to an embodiment of the present application;

[0020] Figure 2 is a model form schematic diagram of adding a bracket model to form a digital composite model in a manufacturing method of an orthodontic bracket positioning and mounting module according to an embodiment of the present application;

[0021] Figure 3 is a schematic diagram of the shape of a sub-guide plate according to an embodiment of the present application when the sub-guide plate is placed on teeth;

[0022] Figure 4 is a schematic diagram of the shape of a sub-guide plate according to an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of the shape of a sub-guide plate according to another embodiment of the present application. DETAILED DESCRIPTION

[0024] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are proposed in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the following embodiments is for the convenience of description, and should not constitute any limitation on the specific implementation of the present application, and the embodiments can be combined and referenced with each other on the premise of not contradicting.

[0025] The “anterior tooth region” and “posterior tooth region” mentioned in the embodiments of the present application are defined according to the classification of teeth in the 2nd edition of “Introduction to Oral Medicine” published by Peking University Medical Publishing House, pages 36-38. The posterior tooth region includes premolars and molars, which are shown as teeth 4-8 in the FDI marking method. The teeth in the anterior tooth region include incisors, lateral incisors and canines, which are shown as teeth 1-3 in the FDI marking method.

[0026] The “gnathic plane” mentioned in the embodiments of the present application is obtained according to the definition and confirmation method in the 6th edition of “Orthodontics”, page 83. One is the line connecting the occlusal midpoint of the first permanent molar and the midpoint between the upper and lower central incisors (1 / 2 of the occlusal plane); the other is obtained by dividing the posterior tooth contact point, and the gnathic contact point of the first permanent molar and the first deciduous molar or the first premolar is often used.

[0027] One embodiment of the present application relates to a manufacturing method of an orthodontic bracket positioning and installation module. The specific process of the manufacturing method of the orthodontic bracket positioning and installation module of the present embodiment can be as shown in Figure 1 , which comprises:

[0028] Model design step 101: using a computer system to add a bracket model at a predetermined position on a digital dental model to form a digital composite model.

[0029] Prototype printing step 102: importing the digital composite model into a printing device to print a prototype entity with a bracket shape.

[0030] The guide plate initial positioning step 103: covering the prefabricated positioning guide plate on the prototype entity, the positioning guide plate comprising a plurality of sub-guide plates, each sub-guide plate corresponding to at least one tooth, wherein the part of the sub-guide plate corresponding to a single tooth is respectively provided with a positioning part corresponding to the occlusal side and the labial side of the tooth, the sub-guide plate is positioned with the corresponding part of the tooth on the prototype entity through the positioning part, and the part of the sub-guide plate corresponding to each tooth and facing the labial side of the tooth is reserved with a groove for accommodating the bracket part on the prototype entity.

[0031] The auxiliary layer manufacturing step 104: filling the gap between the positioning guide plate and the bracket on the prototype entity with liquid silicone to form an auxiliary layer, and taking off the positioning guide plate with the auxiliary layer after the liquid silicone is cured.

[0032] The assembly step 105: assembling the bracket accessory into the groove of the positioning installation template with the bracket.

[0033] The manufacturing method of the orthodontic bracket positioning installation module in some embodiments of the present application is implemented through the above steps 101 to 105. To solve the problems of secondary pollution of the bracket, complex process and the like in the manufacturing process of the bracket installation template, the manufacturing process is changed, the bracket is designed on the digital model in the model design stage, the printed prototype not only carries the shape of the bracket, but also the positions of the bracket and the tooth are predetermined in the design, so as to avoid the error of manual pasting. The positioning part is arranged at the position of the tooth corresponding to the guide plate, and the groove is arranged at the position of the bracket corresponding to the guide plate, then the guide plate is covered on the prototype entity in imitation of the tooth wearing process, the bracket on the prototype is accommodated in the groove, the positions of the guide plate and the tooth are relatively fixed, at this time, the remaining gap in the groove is filled with liquid silicone to position the assembly position of the bracket. It can be seen that the manufacturing method in the embodiment of the present application designs the digital bracket model on the digital dental model, and the positioning of the bracket is completed in the digital design stage, so that the subsequent bracket entity positioning is avoided, not only the secondary pollution of the bracket can be reduced, but also the bracket bottom surface pollution can be avoided, the process is simplified, and the precision is improved.

[0034] The implementation details of the manufacturing method of the orthodontic bracket positioning installation module in the embodiment will be specifically described below. The following content is only provided for the implementation details for the convenience of understanding, and is not necessary for implementing the present solution.

[0035] In step 101, a computer system is used to add a bracket model at a predetermined position on a digital dental model to form a digital composite model, as shown in FIG. 1. Figure 2Specifically, the step can be combined with the modeling and design process of the digital dental model, such as generating the dental model according to the patient's dentition, adding the bracket model after the generation of the digital dental model. The bracket model can be a prefabricated digital attachment, which is added through the interactive window when needed, or automatically added by the computer software when needed. In actual application, the placement position, size specification and other parameters of the bracket can be changed during the addition of the bracket attachment, which will not be described here.

[0036] More specifically, the above computer system can be realized by hardware or a combination of computer software and hardware. For hardware implementation, the computer system can be realized by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, other electronic devices for implementing the manufacturing functions of the orthodontic bracket positioning and installation module, or a selected combination of the above devices.

[0037] It should be noted that the prefabricated bracket model can have a connecting part. Specifically, when adding the bracket model, the connecting part is overlapped with the dental model part, and the model is merged by using Boolean operation, and the overlapping part is cut off to obtain a digital composite model. The composite model obtained in this way has a surface that is not easy to have holes, so that the model is as complete as possible.

[0038] In some embodiments, the predetermined position of the bracket model when added can be automatically generated by the computer, which can make the determination of the bracket installation position more convenient and improve the degree of automation. In other embodiments, the predetermined position can also be manually specified by a person. Since the bracket position directly affects the force position and direction of the arch wire on the teeth during the orthodontic process, the doctor or designer can manually specify the placement position of the bracket according to the required force position and direction. It can be seen that the selection of the predetermined position is more flexible when manually specified. In addition, since the oral conditions are different, the predetermined position can also be manually adjusted to avoid interference with the occlusion, which will not be described here.

[0039] In some embodiments, the above predetermined position can specifically include: a lip or buccal side center position or a clinical crown center (FA point) position of the tooth. When the tooth where the bracket to be added is a front tooth, it can be the center of the labial surface, and when the tooth where the bracket to be added is a back tooth, it can be the center of the buccal surface. Limiting the specific available predetermined position, the lip or buccal side center position or the clinical crown center is relatively easy to identify on the model, on the one hand, it is convenient for automatic identification of the predetermined position and convenient for addition, on the other hand, it makes the selection of the addition position have universality and can be applied to teeth of different tooth positions.

[0040] In step 102, the digital composite model is imported into a printing device to print a prototype entity with a bracket shape. Specifically, the file of the 3D digital composite model 20 generated in step 101 is imported into a 3D printing device, and then the printing device prints a prototype entity layer by layer, which is a model of the patient's dental arch with the surface of the teeth having a bracket shape. According to different printing technologies, the 3D printing device includes: fused deposition modeling (FDM) technology, which is one of the most common 3D printing technologies on the market. It uses thermoplastic materials to build 3D models by heating and extruding them through a nozzle. Stereolithography (SLA) technology uses light curing technology to solidify liquid resin by projecting light to manufacture 3D models. There are other technologies that can be used to print models of materials such as ceramic and metal with higher hardness. Depending on different needs, different materials and different printing technologies can be selected for the printing device to expand the application scenarios, which will not be listed here.

[0041] It is worth mentioning that in some embodiments, as shown in Figure 3 The positioning guide plate in this embodiment includes a plurality of sub-guide plates, and each sub-guide plate corresponds to at least one tooth, Figure 3 The groove 50 in the sub-guide plate 41 shown in the middle of the above embodiment is used to accommodate the bracket part 30 on the prototype entity and the adhesive layer 31 of the preset thickness. It can be understood that the above adhesive layer 31 can be added when designing the digital composite model in step 101, and then printed together in the printing stage of this step. Since the bracket needs to be manually coated with adhesive by the doctor when installed, and the thickness of the adhesive after curing will also affect the position of the bracket in three-dimensional space, this embodiment adds a preset thickness of the adhesive layer during the design of the model, so that the installation template reserves a predetermined thickness of the adhesive layer when worn on the patient's teeth, which facilitates the doctor to limit the amount of adhesive applied, so that the final formed bracket position is more in line with the designed position. It is worth mentioning that the adhesive layer 31 can be a uniform thickness adhesive layer 31, or a non-uniform thickness adhesive layer 31. Since the tooth surface profile is not flat, it has a concave-convex curvature, so the thickness of the adhesive layer can consider the spatial position required by the bracket model during design. More specifically, in the above embodiment, in order to better occupy the adhesive layer, the height L of the side wall of the groove 50 in the sub-guide plate is designed as follows: when the positioning guide plate accurately covers the prototype entity, the side close to the tooth surface is in contact with the tooth surface.

[0042] It should also be noted that the aforementioned bracket models 30 are of various types; the model design step may include: selecting a bracket model based on the tooth position where the bracket is located, and adding it to the digital dental model. Since different tooth positions have different tooth surface dimensions and their orthodontic requirements may also be different, it is limited that the bracket model has multiple types. Selecting different types of bracket models as needed during design is conducive to meeting different tooth positions and different orthodontic requirements. It is worth mentioning that the aforementioned types can include types such as size and specifications, and can also include classifications of different torques and different axial inclinations. The types are flexible and diverse, and the categories are wide-ranging.

[0043] In step 103, the prefabricated positioning guide is covered on the prototype entity. Each positioning guide includes several sub-guides, and each sub-guide corresponds to at least one tooth. Figure 4 For example, the sub-guide plate 41 corresponds to four teeth. Specifically, the portion of the sub-guide plate 41 corresponding to a single tooth is provided with a positioning portion ( Figure 3 411 and 412), the above-mentioned sub-guide is positioned with the teeth of the corresponding part on the prototype entity through the positioning part, and the part of the sub-guide corresponding to each tooth facing the buccal side of the tooth is reserved with a groove for accommodating the bracket part on the prototype entity. Among them, the part corresponding to the sub-guide 41 refers to the teeth covered by the sub-guide 41 when it is fixed to the teeth. For example, the teeth corresponding to the part of a sub-guide are teeth No. 3-3 in the anterior area, and the sub-guide covers teeth No. 3-3 in the anterior area when it is covered on the prototype entity. Furthermore, the sub-guide is provided with six positioning parts corresponding to the six teeth in the anterior area, each positioning part can be fixed with a corresponding tooth. When the sub-guide is accurately covered on the prototype entity, each positioning part is fixed with the corresponding tooth, so that the relative position of the entire sub-guide and the teeth in the anterior area is stable.

[0044] It should be noted that the above step covers the prefabricated positioning guide plate to the prototype entity, which is used to simulate the installation of the module worn on the teeth, and each sub-guide plate of the positioning guide plate is covered on the teeth in different areas, and the positioning part therein matches the tooth profile, and the concave and convex surfaces of the tooth profile are fixed to each other. In one embodiment, the positioning guide plate can include three segments, one segment corresponding to the anterior teeth area, and the other two segments corresponding to the posterior teeth area on both sides, and when covering, the three segments can be covered to the corresponding tooth area respectively. It can be understood that, since the teeth in the anterior teeth area and the teeth in the posterior teeth area are slightly different in arrangement direction, the teeth in the anterior teeth area are arranged in a horizontal direction, and the teeth in the posterior teeth area are arranged in a sagittal direction, so the positioning guide plate is made into three segments to cover, so that the sub-guide plates are less restrained and more flexible, and it is easier to position to the target position of the target tooth. In addition to the above-mentioned sub-guide plate partition form, other embodiments can also use other partition forms, such as segmenting the part of the tooth position far from the ideal position to form a sub-guide plate, which will not be listed one by one. Among them, the number of teeth corresponding to each sub-guide plate is not limited, which can correspond to one tooth or multiple teeth.

[0045] In some embodiments, the part corresponding to a single tooth in each of the above-mentioned sub-guide plates has a width in the mesiodistal direction greater than or equal to two-thirds of the width of the corresponding tooth in the mesiodistal direction. Since the positioning part is too narrow and is not conducive to stable positioning, the embodiment limits the width of the sub-guide plate corresponding to each tooth to be greater than or equal to two-thirds, to ensure the relative stability during positioning.

[0046] In some embodiments, the above-mentioned prefabricated positioning guide plate can be made by the following steps: designing a digital model of the positioning guide plate in advance according to the dental model of the patient and the positioning position of the bracket, printing the digital model of the positioning guide plate to obtain the entity of the positioning guide plate. In this embodiment, the prefabrication method of the positioning guide plate is limited, and the positioning guide plate can be designed individually, so that the positioning guide plate is more fitted to the teeth after being made, and the positioning of the covered teeth is more accurate. In the above-mentioned embodiment, the positioning guide plate is customized according to the individual arrangement of the patient's teeth, and in other embodiments, the positioning guide plate can also be designed in a unified standard form, such as corresponding to a large, medium and small variety of specifications, which can be selected according to the size of the patient's dental arch, and other design forms can also be used in actual application, which will not be listed one by one.

[0047] In some embodiments, during the process of designing a digital model of the positioning guide plate in advance according to the dental model of the patient and the positioning position of the bracket, the following is combined Figure 3 and Figure 4As shown, the positioning sub-parts 411 and 412 can be designed respectively, specifically, the occlusal surface positioning sub-part 411 matches the occlusal surface contour of the corresponding tooth, and the labial and buccal side positioning sub-part matches the labial and buccal surface contour of the corresponding tooth. That is, in the design of the positioning guide plate, the positioning part is designed as two positioning sub-parts, and the directions of the forces on the tooth are different due to the different contact surfaces of the two positioning sub-parts and the tooth, so that positioning in two directions is limited, specifically, the occlusal side and the labial and buccal side, and positioning from two directions makes the positioning of the positioning guide plate and the tooth more stable.

[0048] Further, in other embodiments, the two-direction positioning sub-parts include an occlusal surface positioning sub-part and a lingual side positioning sub-part (not shown in the figure), the lingual side positioning sub-part matches the labial and buccal surface contour of the corresponding tooth on the side close to the tooth surface, and the tooth is positioned and contacted from the occlusal surface and the lingual side respectively, and the positioning of the positioning guide plate and the tooth is more stable and reliable by using positioning in two directions. In addition, in some embodiments, the bracket accessory can be installed on the lingual side of the tooth, and designing the lingual side positioning sub-part is also more conducive to stabilizing the relative position of the bracket accessory and the lingual side of the tooth. It can be seen that in actual application, different positioning sub-parts can be designed according to different application scenarios and different needs, and in addition to the positioning methods of the positioning parts listed above, they will not be listed one by one here.

[0049] In step 104, liquid silicone is used to fill the gap between the positioning guide plate and the bracket on the prototype entity to form an auxiliary layer, and after the liquid silicone is cured, the positioning guide plate with the auxiliary layer is removed. Specifically, the positioning guide plate (such as the sub-guide plate 41) is covered on the prototype entity, at this time the groove 50 on the sub-guide plate 41 can be sleeved on the bracket part on the prototype entity 201, and generally the space of the groove 50 is slightly larger than the bracket 30, so that after positioning, there is still a gap (the oblique shaded part in the figure) between the groove wall 51 and the bracket 30, then the gap is filled with silicone, and after the silicone is cured, a containing space matching the shape of the covered bracket is positioned in the groove 50, so as to facilitate the subsequent assembly of the bracket entity. It is worth mentioning that when filling the silicone, the entire gap left by the groove needs to be filled with the silicone in order to form a containing space that completely matches the shape of the bracket. Figure 3 Figure 3

[0050] ​​Continuing to explain, liquid silicone rubber is a liquid glue with good flowability, fast vulcanization, and more safety and environmental protection, which can fully meet the requirements of food grade. Liquid silicone rubber has excellent tear resistance, resilience, anti-yellowing, thermal stability and heat resistance and aging resistance. Specifically, the curing method of liquid silicone rubber is various, and one commonly used in the embodiment is normal temperature curing method. The liquid silicone rubber is placed at normal temperature (usually at room temperature), and is cured by moisture in the surrounding environment and air humidity. In addition, other embodiments can also use low-temperature accelerated curing method, thermal curing method, etc. Those skilled in the art can understand that different curing methods can be selected according to different application scenarios, and will not limit the core of the application. Continuing to explain, after curing, the formed silicone rubber layer is the auxiliary layer. At this time, the positioning guide plate is removed, and the auxiliary layer of the silicone material is removed together with the positioning guide plate. The recess of the positioning guide plate has formed a receiving space corresponding to the shape of the bracket.

[0051] In step 105, the bracket accessory is assembled into the recess of the positioning guide plate with the auxiliary layer to form a positioning installation template with brackets. Specifically, after the positioning guide plate with the auxiliary layer is removed in step 104, the auxiliary layer is left in the recess of the positioning guide plate, and the auxiliary layer forms a receiving space matching the appearance contour of the bracket accessory. Then the bracket accessory can be assembled into the receiving space of the corresponding recess. Since the bracket accessory is small in size and various in model, it is difficult to accurately distinguish from the appearance, so the identity number of the bracket accessory can be prepared in advance before assembly, and the identity number of the required bracket accessory is directly marked in the design. Then, the bracket accessory to be assembled can be directly identified according to the identity number to reduce the misassembly rate.

[0052] According to the above steps 101 to 105, the bracket positioning installation module for orthodontics is manufactured, including the guide plate part, the auxiliary layer and the bracket accessory. When the installation module is used, the doctor or professional person applies adhesive to the bottom plate of the bracket accessory in the installation module, and then wears it on the patient's teeth. Since the positioning guide plate and the corresponding teeth are fixed respectively, the relative position of the bracket accessory in the positioning guide plate and the teeth is fixed, that is, when the positioning guide plate in the installation module is worn in place, the bracket accessory will be in the position required in the design. After the adhesive is cured, the bracket accessory is fixed on the surface of the target tooth, and then the positioning guide plate is removed. The bracket accessory is fixed on the surface of the tooth due to the action of the adhesive, the bracket accessory is separated from the auxiliary layer on the other side, and the auxiliary layer is removed together with the positioning guide plate, leaving the bracket accessory on the surface of the tooth, that is, the positioning and installation of the bracket accessory are completed. In this process, the bracket accessory does not need to be manually placed by the doctor, and the position is determined by the previous position design, which is accurate and reliable, and has low operation threshold.

[0053] It is worth mentioning that, in the embodiment, although the positioning guide plate includes multiple sub-guide plates, in actual application, the positioning guide plate can include only one sub-guide plate. In addition, in the embodiment, one sub-guide plate corresponds to four teeth, and in other embodiments, it can also correspond to one tooth, three teeth, six teeth, etc., which will not be listed one by one here.

[0054] It can be seen that the manufacturing method of the orthodontic bracket positioning and mounting module in the embodiment solves the problems of secondary pollution of the bracket, complex process, etc. during the manufacturing process of the bracket mounting template, changes the manufacturing process, designs the bracket on the digital model in the model design stage, so that the printed prototype not only carries the shape of the bracket, but also the positions of the bracket and the teeth are predetermined during the design to avoid the error of manual pasting. The positioning part is arranged at the position of the guide plate corresponding to the tooth, and the groove is arranged at the position of the guide plate corresponding to the bracket. Then, the guide plate is covered on the prototype entity to imitate the tooth wearing process. The bracket on the prototype is accommodated in the groove, and the positions of the guide plate and the tooth are relatively fixed. At this time, the remaining gap in the groove is filled with liquid silicone to position the assembly position of the bracket. It can be seen that the manufacturing method in the embodiment of the application designs the digital bracket model on the digital dental model, and the positioning of the bracket is completed in the digital design stage to avoid subsequent positioning of the bracket entity. Not only can the secondary pollution of the bracket be reduced, but also the bracket bottom surface pollution can be avoided, the process is simplified, and the precision is improved.

[0055] Another embodiment of the application also relates to a manufacturing method of an orthodontic bracket positioning and mounting module. The embodiment is basically the same as the above-mentioned embodiment, and the main improvement is that: in the design of the positioning guide plate, a weak connection structure is arranged between the two adjacent sub-guide plates, so that the weak connection structure can be damaged when needed to form a partial split structure and realize the mutual separation of the sub-guide plates, which is convenient for doctors to wear for patients.

[0056] Specifically, in the process of designing the digital model of the positioning guide plate in the embodiment, the weak connection structure can be arranged between the two adjacent sub-guide plates. The weak connection structure in the embodiment is an actual connection, but it is relatively easy to be damaged when subjected to external force. In the integrally formed positioning guide plate, the weak connection structure can be a relatively narrow connection strip, or a gap that needs to be broken at the breaking point, etc., which will not be listed one by one here.

[0057] Correspondingly, in the process of printing the digital model of the positioning guide plate to obtain the entity of the positioning guide plate, as Figure 5As shown, the digital model of the positioning guide plate with the weak connection structure 42 can be printed to obtain the positioning guide plate with the weak connection structure 42. Specifically, the weak connection structure 42 can be a structure that is easily damaged by external force, such as a narrow connection strip, so that the two sub-guide plates are integrally connected during printing. When it is necessary to disconnect the connection, the connection strip can be broken by external force to separate the two sub-guide plates as independent sub-guide plates. For example, as shown in the figure, the sub-guide plate 41 corresponds to four teeth, and three weak connection structures 42a, 42b, and 42c are included. The width T2 of the weak connection structure 42a is smaller than the width T1 of the sub-guide plate in the tooth part. It can be understood that when the positioning guide plate on both sides of the weak connection structure 42a is bent and forced, it will be deformed to break, so that the sub-guide plate is separated into two independent sub-guide plates. The specific position of the breakage can be selected according to actual needs, which is convenient and flexible to use and does not affect the manufacturing process. Figure 5 As shown in the figure, the sub-guide plate 41 corresponds to four teeth, and three weak connection structures 42a, 42b, and 42c are included. The width T2 of the weak connection structure 42a is smaller than the width T1 of the sub-guide plate in the tooth part. It can be understood that when the positioning guide plate on both sides of the weak connection structure 42a is bent and forced, it will be deformed to break, so that the sub-guide plate is separated into two independent sub-guide plates. The specific position of the breakage can be selected according to actual needs, which is convenient and flexible to use and does not affect the manufacturing process.

[0058] As can be seen, since the guide plate is usually manufactured by 3D printing process, the overall manufacturing can ensure the accuracy of the size and relative position. However, when worn, the integrated mounting guide plate is not conducive to wear due to the misalignment of the teeth. Therefore, in the present embodiment, the weak connection is provided between the sub-guide plates, so that the weak connection structure can be damaged when needed to form a partially separated structure, realizing the mutual separation of the sub-guide plates, which is convenient for doctors to wear for patients.

[0059] Further, if a certain sub-guide plate corresponds to multiple teeth, the process of designing the digital model of the positioning guide plate can also include: providing a weak connection structure for the part of the sub-guide plate corresponding to the interproximal space. It can be understood that when one sub-guide plate corresponds to multiple teeth, each tooth corresponds to a separate positioning part. At this time, the weak connection structure connects the parts of the sub-guide plate corresponding to multiple teeth, which is convenient for printing at one time and more accurate in the mutual position relationship. When the doctor uses it, the position of the teeth can be considered, and the parts corresponding to different teeth can be worn on the teeth respectively. Therefore, the weak connection structure can be broken, so that the sub-guide plate can be divided into several small blocks, each small block corresponding to one or more teeth, and each small block having an independent positioning part for positioning the corresponding tooth. As can be seen, the above embodiment further designs a weak connection structure in the middle of the sub-guide plate, taking into account the accuracy and convenience of manufacturing the sub-guide plate and the convenience of wearing.

[0060] The above steps of various methods are only for clear description, and can be combined into one step or some steps can be split and decomposed into multiple steps as long as the same logical relationship is included, which is within the protection scope of the present patent. Adding irrelevant modifications or introducing irrelevant designs in the algorithm or process, but not changing the core design of the algorithm and process, are within the protection scope of the present patent.

[0061] Another embodiment of the present application relates to an orthodontic bracket installation module, in particular, the orthodontic bracket installation module obtained by the manufacturing method of the orthodontic bracket positioning installation module in the above embodiments. Specifically, the orthodontic bracket installation module can be designed and manufactured according to the patient information submitted by the doctor or professional, and the manufactured orthodontic bracket installation module is handed over to the doctor or professional, and is used as needed. When used, it is simple and reliable, the placement position of the bracket accessory is accurately positioned, the placement accuracy is improved, and the operation difficulty is reduced.

[0062] Specifically, the orthodontic bracket installation module in the present embodiment can be combined by a plurality of sub-guider plates. The plurality of sub-guider plates can be an independent split structure, can be a connected form provided with a weak connection structure, or can be provided with a plug-in structure. The sub-guider plates can be plugged in as needed, and the product forms are various, which will not be listed one by one here.

[0063] It should be noted that the above examples in the present embodiment are examples for facilitating understanding and do not limit the technical solutions of the present application.

[0064] Those skilled in the art can understand that the above embodiments are specific embodiments for implementing the present application, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A method of manufacturing an orthodontic bracket positioning installation module, characterized by, The method comprises the following steps: a model design step: adding a bracket model to a predetermined position on a digitized dental model using a computer system to form a digitized composite model; a prototype printing step: importing the digitized composite model into a printing device to print a bracket-shaped prototype entity; a guide plate initial positioning step: covering a prefabricated positioning guide plate on the prototype entity, the positioning guide plate comprising a plurality of sub-guide plates, each sub-guide plate corresponding to at least one tooth, wherein the part of the sub-guide plate corresponding to a single tooth is respectively provided with a positioning part corresponding to the occlusal side and the labial side of the tooth, the sub-guide plate is positioned with the corresponding part of the tooth on the prototype entity through the positioning part, and the part of the sub-guide plate corresponding to each tooth faces the labial side of the tooth and is provided with a groove for accommodating the bracket part on the prototype entity; an auxiliary layer manufacturing step: filling the gap between the positioning guide plate and the bracket on the prototype entity with liquid silicone to form an auxiliary layer, and taking off the positioning guide plate with the auxiliary layer after the liquid silicone is cured; an assembly step: assembling the bracket accessory into the groove of the positioning guide plate with the auxiliary layer to form a bracket-equipped positioning installation template.

2. The method of fabricating an orthodontic bracket positioning and mounting module according to claim 1, wherein, The predetermined position is specified by a designer or automatically generated by a computer.

3. The method of manufacturing an orthodontic bracket positioning and mounting module according to claim 1, wherein, The predetermined position includes the center position of the labial side of the tooth or the clinical crown center position.

4. The method of manufacturing an orthodontic bracket positioning and mounting module according to claim 1, wherein, The prefabricated positioning guide plate is manufactured by the following steps: designing a digitized model of the positioning guide plate in advance according to the dental model of the patient and the bracket positioning position, and printing the digitized model of the positioning guide plate to obtain a positioning guide plate entity.

5. The method of manufacturing an orthodontic bracket positioning and mounting module according to claim 4, wherein, The design of the digitized model of the positioning guide plate includes designing an occlusal surface positioning sub-part and a labial side positioning sub-part, or designing an occlusal surface positioning sub-part and a lingual side positioning sub-part, wherein the occlusal surface positioning sub-part matches the occlusal surface contour of the corresponding tooth, the labial side positioning sub-part matches the labial surface contour of the corresponding tooth on the side close to the tooth surface, and the lingual side positioning sub-part matches the labial surface contour of the corresponding tooth on the side close to the tooth surface.

6. The method of manufacturing an orthodontic bracket positioning and mounting module according to claim 5, wherein, The model design step includes adding a glue layer with a preset thickness between the bracket model and the tooth surface. The groove in the sub-guide plate is used to accommodate the bracket part on the prototype entity and the glue layer with the preset thickness.

7. The method of manufacturing an orthodontic bracket positioning and mounting module according to claim 4, wherein, The design of the digitized model of the positioning guide plate includes setting a weak connection structure between two adjacent sub-guide plates. The printing of the digitized model of the positioning guide plate to obtain a positioning guide plate entity includes printing the digitized model of the positioning guide plate with a weak connection structure to obtain a positioning guide plate entity with a weak connection structure.

8. The method of manufacturing an orthodontic bracket positioning and mounting module according to claim 7, wherein, If the sub-guide plate corresponds to multiple teeth, the design of the digitized model of the positioning guide plate includes setting a weak connection structure for the part of the sub-guide plate corresponding to the interproximal space.

9. The method of manufacturing an orthodontic bracket positioning and mounting module according to claim 1, wherein, The part of each sub-guide plate corresponding to a single tooth has a width in the mesiodistal direction greater than or equal to two-thirds of the width of the corresponding tooth in the mesiodistal direction.

10. The method of manufacturing an orthodontic bracket positioning and mounting module according to claim 1, wherein, The bracket model has multiple types; the model design step includes selecting a bracket model according to the tooth position of the bracket and adding it to the digitized dental model.

11. An orthodontic bracket mounting module, characterized by an orthodontic bracket mounting module obtained according to the manufacturing method of the orthodontic bracket positioning mounting module according to claims 1-10.

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