CN112754695A

CN112754695A - 3D printing type personalized traction device for upper jaw embedded anterior teeth and 3D printing method

Info

Publication number: CN112754695A
Application number: CN202110060836.0A
Authority: CN
Inventors: 苏晓霞; 邱韬; 廖立; 邹静; 李小兵
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-05-07

Abstract

The invention discloses a3D printing type individualized traction device for upper jaw embedded anterior teeth and a3D printing method. The 3D printing method mainly comprises the steps of importing patient CBCT data in a dcm format into Dolphin11.0, Mimics research19.0 and Magics software, intercepting tooth positions required to be designed according to clinical requirements, and copying tooth surface states of the buccal labial and palatal lingual sides; the requirement of the metal plate clearance: the thickness is 0.4-0.6mm, and the tooth surface morphology of the buccal labial and lingual palatal sides is copied; the design requirement of the towing hook is as follows: the position and the direction of the traction hook are designed according to the requirement of the traction direction, the length of the traction hook is 0.8-1.5mm, and the traction hook does not occupy the space of the tooth surface; the final design is stored in stl format and input into a3D printer for printing, the invention has the characteristics of complete copying of the tooth surface lip and tongue surface shapes, uniform thickness of the metal plate, smooth surface, one-step forming, high speed and the like, and avoids the problems of non-lamination with the tooth surface, need of repeated disassembly and assembly, secondary windowing and the like.

Description

3D printing type personalized traction device for upper jaw embedded anterior teeth and 3D printing method

Technical Field

The invention belongs to the technical field of 3D printing preparation of medical equipment, and particularly relates to a3D printing type personalized upper jaw embedded anterior tooth traction device and a3D printing method.

Background

Buried teeth are one of the common diseases in the oral cavity, and refer to teeth that have passed their eruption stage and have not yet erupted in jaw tissues. Especially, the maxillary occlusion anterior dentition of teenagers is beautiful, if the maxillary occlusion anterior dentition is not treated in time, adjacent important anatomical structures are influenced or the maxillary occlusion anterior dentition is forced to be removed due to abnormal tooth root development, and the pronunciation, the facial appearance and the psychology of the patients are seriously influenced. Clinically, the combined treatment mode of surgical operation and orthodontic traction is adopted to assist the eruption, and the principle is that a part of alveolar bone is removed in surgery to expose the dental crown of the embedded tooth and the embedded tooth is matched with orthodontic traction, so that the embedded tooth enters a corresponding tooth position. The traction direction needs to be adjusted to be consistent with the long axis of the tooth body along with the change of the position of the tooth in time, thereby being most beneficial to the traction and eruption of the embedded tooth.

The most of the currently used maxillary embedding anterior teeth traction devices in clinic are finished products with metal chain lingual side buckles or brackets, and the retention force mainly comes from bonding retention. When the dental crown is exposed in surgery, the field of vision of operation in the mouth is limited, a large amount of bones need to be removed to search for a flat part for adhesion, so that sometimes the adhesion part is not in the optimal traction direction; because the volume form of the finished bottom plate is limited, but the shapes of the side of the embedded tooth lip and the palate are different, the thickness of the adhesive is different, and the roughness and the foreign body sensation are increased because the traction device cannot be attached to the tooth surface; the time and labor are consumed when the saliva and blood in the operation area are manually positioned on site under more conditions, and the risk of bonding failure is increased. The most common situation of inverted maxillary anterior teeth is that the traction direction needs to be changed in the process of guiding sprout, so that a new traction device has to be bonded after windowing in a secondary operation, the infection risk, the wound and the pain of a patient are increased, the attached gum is possibly lost, even the traction fails, and the doctor-patient contradiction is easily caused. Therefore, a novel personalized maxillary embedding anterior tooth traction device which is personalized before operation, can be rapidly positioned in the mouth during operation, can be firmly bonded and can flexibly adjust the traction direction during treatment is urgently needed clinically.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the 3D printing type individualized traction device for the upper jaw embedded anterior teeth and the 3D printing method are provided, and at least some technical problems mentioned in the background art are solved.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

individualized draw gear of 3D printing formula upper jaw embedding anterior teeth, include with embedding anterior teeth looks adaptation be used for the gomphosis in order to carry out the bonding maintenance metal sheet of maintenance to embedding anterior teeth on, can dismantle lip side draw hook and the tongue side draw hook of connecting on bonding the maintenance metal sheet.

Furthermore, the surface of the bonding and fixing metal plate which is jointed with the embedded anterior teeth is roughened by acid etching and then forms strong chemical bonding with the embedded anterior teeth by the bonding agent, and the other outer surfaces of the bonding and fixing metal plate except the surface of the bonding and fixing metal plate are subjected to high polishing treatment.

Furthermore, the bonding and fixing metal plate is provided with a lip side traction hook, lip side traction hook threads capable of adjusting the ligation site to change the traction direction, a tongue side traction hook and lip side traction hook threads capable of adjusting the ligation site to change the traction direction.

Furthermore, the thickness of the bonding and fixing metal plate is 0.4-0.6 mm; the length of the labial traction hook is the same as that of the lingual traction hook, and both the labial traction hook and the lingual traction hook are 0.8-1.5 mm.

3D printing method of 3D printing type individualized traction device for upper jaw embedded anterior teeth comprises the following steps:

step 1, importing CBCT data of a patient dentition into Dolphin11.0 software for three-dimensional reconstruction and correct positioning, importing a file after correct positioning into Mimics Research17.0 software, intercepting the dentition of a required design position, and reconstructing a three-dimensional data model;

step 2, copying the tooth surface shapes of the labial side and the lingual side to design and form a design file of the bonding and fixing metal plate, the labial side traction hook and the lingual side traction hook;

and 3, inputting the designed and formed bonding and fixing metal plate, lip side traction hook and tongue side traction hook design files into a3D printer for 3D printing.

Further, in the step 1, firstly, the patient dentition CBCT data is three-dimensionally reconstructed by the dolphin11.0 software, secondly, the direction and the origin of the patient three-dimensional reconstruction model are correctly set by using the median bony sign of the patient, and finally, Dicom data after the correct setting is derived.

Further, in the step 1, threshold value expansion and three-dimensional reconstruction are performed on the dentition CBCT data after the patient is correctly positioned through the mimics research17.0 software, and STL data after the dentition CBCT reconstruction is derived.

Further, in the step 1, the STL data of the oral scan of the patient and the STL data after CBCT reconstruction of the dentition are manually fitted and subjected to computer iterative fitting through magics21.0 software or geogenic studio13.0 software to obtain the STL data of the dentition and tooth root model.

Further, in the step 2, the simulated segmentation of the dentition model is completed through interactive CAD/CAM software, an adhesive retention metal plate model with the thickness of 0.4-0.6mm, the thickness of which is completely fitted with the external shape of the dental crown lip and palate side and is free of undercut is designed on the basis of the three-dimensional model data of the embedded tooth, and the lip side traction hook model and the tongue side traction hook model are respectively connected with the adhesive retention metal plate model according to the orthodontic traction direction to form a design file of the individual traction device for the upper jaw embedded anterior tooth, and the design file is stored in an STL format.

Further, in the step 3, the designed and formed bonding fixing metal plate, lip side drawing hook and tongue side drawing hook design file is subjected to support and layering processing through 3D printing data processing software, and then the slice data is led into a fused deposition modeling 3D printer for printing and manufacturing.

The invention introduces patient Cone Beam Computed Tomography (CBCT) data in a DICOM format into Dolphin11.0 software for three-dimensional reconstruction and correct positioning, introduces the positioned data into magics21.0 software for mouth scan data overlapping and Mimics research17.0 software for three-dimensional reconstruction, intercepts teeth required to be designed according to clinical requirements, and copies the tooth surface forms of the lip, the cheek, the palate and the side of the tongue. Data extraction and production: 1. the CBCT data of the patient is subjected to three-dimensional reconstruction through Dolphin11.0 software, the direction and the origin of a three-dimensional reconstruction model of the patient are reset by using median bony marks such as maxillary palatal suture, piriform hole, mandibular median union and the like of the patient, the common origin is selected as a point (such as a near or far incisal point of maxillary middle incisor lateral incisor, a cusp point of maxillary cuspid and the like) which is easy to confirm for the dental crown of the patient, and the Dicom data after the rearrangement is derived. 2. And (3) performing threshold expansion and three-dimensional reconstruction on the dentition CBCT data after the patient is repositioned through the mimics research17.0 medical three-dimensional software, and deriving STL data after CBCT reconstruction. 3. And (3) carrying out manual fitting and computer iterative fitting on the oral scanning STL data and the CBCT data of the patient through magics21.0 software or geogenic studio13.0 software to obtain the STL data of the dentition and the tooth root model.

The invention has the following requirements on the clearance between the traction device and the tooth surface on the lip and palate side: the thickness is 0.4-0.6mm, and the tooth surface shape of the lip and palate side is duplicated; the design requirement of the towing hook is as follows: according to the traction position, different types and directions of traction hooks are designed. The method comprises the steps of finishing simulation segmentation of a dentition model through interactive CAD/CAM system (3shape application designer) software, designing a metal plate with the thickness of 0.4-0.6mm, completely fitting the external shape of the lip and palate side of a dental crown and without undercut based on three-dimensional model data of an embedded tooth, connecting different types and different designs of traction hooks with the smooth metal plate without undercut according to the orthodontic traction direction, forming a design file of the personalized upper jaw embedded anterior tooth traction device, and storing the design file in an STL format. The final design was saved in Stereolithography (STL) format and input into a3D printer for printing. And finishing the printing of the personalized upper jaw embedding anterior teeth traction by a fused deposition modeling 3D printer. And carrying out support and layering processing on the designed data of the traction device through 3D printing data processing software, and then importing the slice data into a3D printer for printing and manufacturing.

Compared with the prior art, the invention has the following beneficial effects:

the invention has simple structure, scientific and reasonable design and convenient use, adopts the 3D Printing personalized upper jaw embedded anterior tooth traction device, completely copies the shapes of the tooth surface lip and the tooth surface, has uniform thickness of the bonded retention metal plate, smooth surface, one-step forming and high forming speed, and can effectively avoid the problems that the traditional tongue side buckle is not attached to the tooth surface, needs to be disassembled and assembled for many times, needs to be opened for the second time, and the like.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a CBCT map of different sections of the patient 21 impacted tooth sagittal and its CBCT three-dimensional reconstruction map at each angle. Wherein, a is CBCT images of different sections of the patient 21 impacted tooth vector positions, and b is a CBCT three-dimensional reconstruction image of each angle of the patient.

FIG. 3 is a three-dimensional reconstructed CBCT repositioned view using Dolphin11.0 software. Wherein, the upper left image is a left lateral view after CBCT three-dimensional reconstruction of a patient; the upper right image is a right lateral view of the patient after CBCT three-dimensional reconstruction; the left lower image is a bottom view of the patient after CBCT three-dimensional reconstruction; the lower right image is the front view of the patient after CBCT three-dimensional reconstruction.

Figure 4 is a photograph and a reconstruction of the scan data within the patient's mouth. Wherein, the group a is the picture in the mouth of the patient, and the pictures are sequentially the view of the upper jaw, the lower jaw, the covering cover, the right side, the front side and the left side; and the group b is a mouth scanning occlusion reconstruction picture of the infant patient.

FIG. 5 is a schematic diagram of the three-dimensional reconstruction performed by the Mimics Research19.0 software. Wherein the upper left image is a CBCT screenshot of a coronal plane of a patient; the upper right picture is a CBCT screenshot of a patient horizontal plane; the left lower image is a CBCT screenshot of a sagittal plane of a patient; the lower right image is a three-dimensional reconstruction view of the patient CBCT.

Fig. 6 is a schematic design diagram of a mouth scan data and CBCT data reconstruction by the mimics21.0 software and a personalized embedded tooth traction device by the 3shape application designer software. Wherein, the pictures a, b and c are respectively the sagittal plane, coronal plane and horizontal plane screenshot of the CBCT of the impacted tooth; d, e and f are respectively right, front and left overlapping views when the patient oral scan model is overlapped with the CBCT three-dimensional reconstruction model; the figure g is a CBCT three-dimensional reconstruction model view of a patient; the drawings h, i, j and k are a design process (drawings h, i and j) of the individual maxillary-embedded anterior tooth traction device of the patient and an individual maxillary-embedded anterior tooth traction device drawing (drawing k), the drawing h is an individual design view that a traction hook of the individual maxillary-embedded anterior tooth traction device can zoom (shown by arrows at two sides of the traction hook and an arrow in the middle right above the traction hook), rotate (shown by an arrow at the right upper side of the traction hook), translate (shown by an arrow at the outermost side above the traction hook), and the like, the drawings i and j are side views of the individual maxillary-embedded anterior tooth traction device and a palate side view, and the drawing k is an individual maxillary-embedded anterior tooth traction device drawing.

Fig. 7 is a schematic diagram of a3D printing process. Wherein the first row is illustrated as a3D printed patient impacted dental model, and the views a, b, c, D, e, and f are in order right, right 45 °, front, left 45 °, left, and top views; the second line of drawings are 3D printed impacted tooth models of patients and 3D printed personalized traction devices for maxillary embedded anterior teeth, and the drawings g, h, i, j, k and l are right side, right side 45 °, front, left side 45 °, left side and top surface views in sequence; in the third line of drawings, the drawings m and n are close-up views of the 3D printing type upper jaw embedded front tooth personalized traction device which is partially enlarged on the model, the drawings o, p and q are real object drawings of the 3D printing type upper jaw embedded front tooth personalized traction device, and the drawings r and s are views of the 3D printing type upper jaw embedded front tooth personalized traction device and ligation views of the separated upper jaw incisor after being spliced and ligatured with ligature wires.

Wherein, the names corresponding to the reference numbers are:

1-metal connection main body, 2-metal main body bonding and fixing surface, 3-lingual traction hook screw thread, 4-lingual traction hook, 5-labial traction hook screw thread, 6-labial traction hook, 7-labial traction wire and 8-lingual traction wire.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and thus, it should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; of course, mechanical connection and electrical connection are also possible; alternatively, they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1-7, the 3D Printing type individualized upper jaw embedded anterior tooth traction device provided by the invention has the advantages of simple structure, scientific and reasonable design and convenient use, completely copies the shapes of the tooth surface lip and the tongue surface by adopting the individualized upper jaw embedded anterior tooth traction device through three-dimensional Printing (3D Printing), has the advantages of uniform thickness and smooth surface of the bonded and retained metal plate, one-step forming and high forming speed, and can effectively avoid the problems that the traditional tongue side buckle is not bonded with the tooth surface, and needs to be disassembled and assembled for many times and windows are opened for two times. The invention comprises a metal connecting main body (1) which is matched with an embedded anterior tooth and is embedded on the embedded anterior tooth so as to fix the embedded anterior tooth, and a lingual traction hook (4) and a labial traction hook (6) which are connected to the metal connecting main body (1).

The invention relates to a metal connecting main body (1) and a metal main body bonding retention surface (2) attached to an embedded anterior tooth, wherein the metal connecting main body bonding retention surface is roughened by acid etching and then forms strong chemical bonding with the embedded anterior tooth through an adhesive, and other outer surfaces of the metal connecting main body (1) except the bonding retention surface (2) are subjected to high polishing treatment.

The invention provides a bonding and fixing metal plate (1) which is provided with a lip side traction hook (6), a lip side traction hook thread (5) capable of adjusting a ligation site to change the traction direction, a lingual side traction hook (4) and a lingual side traction hook thread (3) capable of adjusting the ligation site to change the traction direction. The thickness of the bonding and fixing metal plate (1) is 0.4-0.6 mm; the labial traction hook (6) and the lingual traction hook (4) have the same length, which is 0.8-1.5 mm.

The invention bonds and fixes the metal sheet: the lip and tongue side traction devices are connected into a whole, and the surface is highly polished to reduce the attachment of bacterial plaque and avoid the adhesion with gum tissues.

The invention bonds and fixes the metal plate face: the bottom surface is matched with the shape of the impacted tooth, and can be mechanically embedded with the impacted tooth to increase retention; the bottom surface is roughened by acid etching, and then the bottom surface is bonded with the impacted tooth through the adhesive to form strong chemical bonding.

The invention relates to a lip side traction hook thread: and (3) a lip side traction wire (7) or a lip side personalized traction hook (a lip side traction hook) is bound, and the thread structure can enhance the retention of the traction and stress application device.

The invention relates to a lip side traction hook: after the embedded tooth is pulled out of the gum, the lip side traction hook can be directly used for further elastic traction.

The invention tongue side traction hook thread: the tongue side traction wire (8) or the tongue side personalized traction hook (tongue side traction hook) is bound, and the thread structure can enhance the retention of the traction and stress application device.

The invention relates to a lingual side towing hook: the tongue side traction hook can be used for elastic traction directly or the traction direction can be adjusted to guide the embedded tooth to go out of the gum.

The invention provides a3D printing method of a3D printing type individualized traction device for upper jaw embedded anterior teeth, which comprises the following steps:

step 1, importing CBCT data of a patient dentition into Dolphin11.0 software for three-dimensional reconstruction and correct positioning, importing a file after correct positioning into Mimics Research17.0 software, intercepting the dentition of a required design position, and reconstructing a three-dimensional data model. Firstly, three-dimensional reconstruction is carried out on patient dentition CBCT data through Dolphin11.0 software, secondly, correct positioning setting is carried out on the direction and the origin of a patient three-dimensional reconstruction model by using a patient median bony mark, and finally, correct positioning and set Dicom data are led out. Threshold value expansion and three-dimensional reconstruction are carried out on the dentition CBCT data after the patient is correctly positioned through the mimics research17.0 software, and STL data after the dentition CBCT is reconstructed are derived. And (3) carrying out manual fitting and computer iterative fitting on the STL data of the oral scan of the patient and the STL data reconstructed by the dentition CBCT through magics21.0 software or geogenic studio13.0 software to obtain the STL data of the dentition and tooth root model.

And 2, copying the tooth surface shapes of the labial side and the lingual side to design and form a design file of the bonding and fixing metal plate, the labial side traction hook and the lingual side traction hook. The simulation segmentation of the dentition model is completed through interactive CAD/CAM software, an adhesive retention metal plate model which is 0.4-0.6mm thick, completely fits with the outline of the dental crown lip and palate side and is free of undercut is designed on the basis of the three-dimensional model data of the embedded tooth, the lip side traction hook model and the tongue side traction hook model are respectively connected with the adhesive retention metal plate model according to the orthodontic traction direction, a design file of the individual traction device of the upper jaw embedded anterior tooth is formed, and the individual traction device is stored in an STL format.

And 3, inputting the designed and formed bonding and fixing metal plate, lip side traction hook and tongue side traction hook design files into a3D printer for 3D printing. And carrying out support and layering processing on the designed and formed bonding and fixing metal plate, lip side traction hook and tongue side traction hook design files through 3D printing data processing software, and then introducing the slice data into a fused deposition modeling 3D printer for printing and manufacturing.

The invention relates to a novel personalized upper jaw embedding anterior tooth traction device which is personalized and designed before operation, can be quickly positioned in the mouth and firmly bonded during operation and can flexibly adjust the traction direction during treatment. According to the position, the shape and the traction path of the impacted tooth, the size, the shape and the bonding part of the traction device and the shape and the position of the traction hook are designed individually, and the direction of force application and the joint with the surface of the impacted tooth are more reasonable and controllable. The integrated device has uniform thickness and smooth surface, is more firm and not easy to break, really realizes closed traction, avoids periodontium inflammation, gingival retraction, epithelial migration and alveolar bone loss, and improves the traction success rate.

According to the invention, CBCT data of a patient in a dcm format is imported into Dolphin11.0 software, positioning is carried out according to bony markers, positioned data is input into Mimics Research17.0 software for threshold value expansion and three-dimensional reconstruction, a tooth position required to be designed is intercepted according to clinical requirements, and a three-dimensional data model is reconstructed. Data extraction and production: the CBCT data of the patient are converted into three-dimensional model data through software such as Dolphin11.0 software, mix research17.0 medical three-dimensional software and magics21.0, and then the maxilla and the related data of the impacted tooth are extracted through the software of magics21.0 and data restoration is carried out. The 3shape application designer software is used for outwards deviating the data of the lingual side and the labial side of the embedded tooth by 0.4-0.6mm, spline cutting is carried out, and then the locator traction hook plug-in is used for carrying out personalized design according to the clinically required traction direction, angle, size, quantity and the like, so that the size of the traction hook plug-in is ensured to be 0.8-1.5mm, and the direction accords with the clinically required traction direction.

The thickness range of the metal plate of the individualized buried tooth traction device is 0.4-0.6mm, and the tooth surface morphology on the buccal labial and palatal lingual sides is copied; the design requirement of the towing hook is as follows: the position and the direction of the traction hook are designed according to the requirement of the traction direction, the length of the traction hook is 0.8-1.5mm, and the traction hook does not occupy the space of the tooth surface. The design of the personalized upper jaw embedding anterior tooth traction device is completed through three-dimensional design software, resin 3D printing is performed by using 3D printers such as DLP/SLA and the like on the basis of dentition CBCT three-dimensional model data, and an embedding dentition CBCT model is completed.

The final design is stored in stl format and input into a3D printer for printing. Printing of the CBCT impacted tooth model is completed through a DLP/SLA3D printer, the designed personalized traction device data of the impacted tooth is subjected to support and layering processing through 3D printing data processing software, and then the slice data is led into an FDM3D printer to be printed and manufactured.

The invention is applicable to the patient standard: the whole gum has no inflammation, no alveolar bone absorption, no caries and no tooth or caries filled, and the maxillary anterior tooth area is proved to have the embedding and the life-stopping by the diagnosis of the panoramic film and CBCT. Collecting patient data content: and collecting the intraoral image, an X-ray panoramic picture, an oral scan or a silicon rubber impression, a large-visual-field CBCT or a small-visual-field CBCT including the impacted tooth area and the like of the patient.

The software design of the invention: the Dolphin11.0 software reconstructs and positions the initial CBCT of the patient; reconstructing CBCT data of a patient after the patient is positioned by using Mimics Research17.0 software; extracting patient impacted tooth information and overlapped patient CBCT and mouth scanning model by using Mimics Research17.0 and material magics21.0 software; 3shape application design software designs a personalized maxillary embedding anterior teeth traction device.

The metal plate requirements of the traction device of the invention are as follows: the thickness is 0.4-0.6mm, and the labial surface and the palatal surface are completely attached to the tooth surface;

the design requirements of the traction hook of the invention are as follows: the position and the direction of the traction hook are designed according to the requirement of the traction direction, the length of the traction hook is 0.8-1.5mm, and the traction hook does not occupy the space of the tooth surface;

the invention discloses a3D printing method: the CBCT and the oral scanning model of the overlapped patients are printed by using photosensitive resin, and the designed personalized upper jaw embedding anterior tooth traction device is printed by using an FDM metal printer.

Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and certainly not to limit the patent scope of the present invention; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems to be solved by the present invention, which are not substantially changed or supplemented by the spirit and the concept of the main body of the present invention, are still consistent with the present invention and shall be included in the scope of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the technical scheme is included in the patent protection scope of the invention.

Claims

The 3D printing type individualized traction device for the upper jaw embedded anterior teeth is characterized by comprising an adhesive retention metal plate (1) which is matched with the embedded anterior teeth and is embedded into the embedded anterior teeth to retain the embedded anterior teeth, and a lip side traction hook (6) and a tongue side traction hook (4) which are detachably connected onto the adhesive retention metal plate (1).
2. The 3D printing type individual traction device for the upper jaw embedded anterior teeth as claimed in claim 1, wherein the surface (2) of the bonded retained metal plate (1) attached to the embedded anterior teeth is roughened by acid etching, and then forms strong chemical bonding with the embedded anterior teeth through an adhesive, and the surface of the bonded retained metal plate (1) except the surface (2) of the bonded retained metal plate is subjected to high polishing treatment.
3. The 3D printing type individual traction device for maxillary embedded anterior teeth according to claim 1, wherein the bonding and fixing metal plate (1) is provided with a labial traction hook (6), labial traction hook threads (5) and lingual traction hook threads (4) which can adjust ligation sites to change traction directions, and lingual traction hook threads (3) which can adjust ligation sites to change traction directions.
4. The 3D-printed maxillary-embedding anterior personalized distraction device according to claim 1, wherein the thickness of the adhesive retention metal plate (1) is 0.4-0.6 mm; the labial traction hook (6) and the lingual traction hook (4) have the same length, which is 0.8-1.5 mm.
5. The 3D printing method of the 3D printing type maxillary embedding anterior teeth personalized traction device according to any one of claims 1 to 4, which is characterized by comprising the following steps:

step 1, importing CBCT data of a patient dentition into Dolphin11.0 software for three-dimensional reconstruction and correct positioning, importing a file after correct positioning into Mimics Research17.0 software, intercepting a impacted dentition at a required design position, and reconstructing a three-dimensional data model;

step 2, copying the tooth surface shapes of the labial side and the lingual side to design and form a design file of the bonding and fixing metal plate, the labial side traction hook and the lingual side traction hook;

and 3, inputting the designed and formed bonding and fixing metal plate, lip side traction hook and tongue side traction hook design files into a3D printer for 3D printing.
6. The 3D printing method according to claim 5, wherein in the step 1, firstly, the CBCT data of the dentition of the patient is subjected to three-dimensional reconstruction through Dolphin11.0 software, secondly, the direction and the origin of the three-dimensional reconstruction model of the patient are subjected to correct positioning setting by utilizing the median bony sign of the patient, and finally, the Dicom data after the correct positioning setting is derived.
7. The 3D printing method according to claim 5, wherein in the step 1, the CBCT data of the dentition after the patient is correctly positioned is subjected to threshold value expansion and three-dimensional reconstruction through mimics research17.0 software, and STL data after CBCT reconstruction of the dentition is derived.
8. The 3D printing method according to claim 5, wherein in the step 1, the STL data of the oral scan of the patient and the STL data after CBCT reconstruction of the dentition are manually fitted and computer-iteratively fitted through magics21.0 software or geogenic studio13.0 software to obtain the STL data of the dentition and the tooth root model.
9. The 3D printing method according to claim 5, wherein in the step 2, the simulated segmentation of the dentition model is completed through interactive CAD/CAM software, an adhesive orthodontic retention metal plate model with the thickness of 0.4-0.6mm, which is completely fit with the external shape of the dental crown lip and palate side and has no undercut is designed on the basis of the three-dimensional model data of the embedded tooth, and the lip side traction hook model and the tongue side traction hook model are respectively connected with the adhesive retention metal plate model according to the traction direction to form a design file of the individual traction device for the upper jaw embedded anterior tooth, and the design file is stored in an STL format.
10. The 3D printing method according to claim 5, wherein in the step 3, the designed bonded retained metal plate, labial side drawing hook and lingual side drawing hook design file are subjected to support and layering processing by 3D printing data processing software, and then the cut piece data is introduced into a fused deposition modeling 3D printer for printing and manufacturing.