Tooth crown and bridge restoration tooth tray and design and manufacturing method thereof

Abstract

The present disclosure relates to the field of medical technology, and proposes a tooth tray for crown and bridge restoration and a design and production method thereof. The design and production method of the tooth tray for crown and bridge restoration includes: obtaining crown and bridge preparation scanning data; calling in the crown and bridge preparation scanning data to form a virtual preparation; designing the placement direction of the tooth tray according to the placement path of the virtual preparation, and selecting the line connecting the gum margin around the virtual preparation as the edge line of the tooth tray; generating the outer surface morphology of the tooth tray body on the virtual preparation; designing the outer surface morphology of the tooth tray body receiving cavity on the virtual preparation, with its edge ending at the inner side of the tooth tray edge line, and increasing the thickness of the receiving cavity by 0.2mm-0.8mm; and obtaining the tooth tray body using the outer surface morphology data and the inner surface morphology data of the tooth tray body. The tooth tray for crown and bridge restoration is designed and produced digitally, which can replace traditional manual production, improve the efficiency and accuracy of tooth tray production, and improve the quality of crown and bridge restoration impressions.

Description

Technical Field

[0001] The present disclosure relates to the field of medical technology, and in particular to a crown and bridge restoration tooth tray and a design and manufacturing method thereof. Background Art

[0002] Impression making is a very important step in dental crown and bridge fixed restoration. Obtaining an ideal impression that accurately replicates the shape of the preparation, especially the edge shape, and is free of defects such as bubbles, defects, demolding, and exposed trays is an important guarantee for making qualified restorations. At present, there are three clinical methods for making fixed restoration impressions at home and abroad, including conventional tray method, digital impression method, and individual tooth tray method. The main advantages and disadvantages are as follows:

[0003] Conventional tray method: Impressions are made directly using finished trays with complete dentition, individual trays made of self-curing or photosensitive resin sheets, or individual trays printed after digital design. This is the most commonly used method in clinical practice. Gingival retraction operation is required in advance, and the gingival retraction material is removed before the impression material is injected. The operation of injecting impression materials into all preparations and finally placing the tray in place needs to be completed within the impression working time. If there are a large number of preparations and the operation time is tight, impression defects are likely to occur, reducing the success rate. The impression material around the preparation is thick, and it is difficult to ensure uniform thickness, which affects the accuracy of impression making. This method has a high success rate for impression making of a small number of preparations. When making impressions of multiple preparations, the gingival retraction operation takes a long time, the operation technology requirements are high, the impression success rate is low, and multiple preparations are often required.

[0004] Digital impression method: uses intraoral optical scanning technology to directly obtain the surface morphology of oral soft and hard tissues, which can omit the steps of making trays and model casting, thereby simplifying the process and saving materials; it is more comfortable for patients than traditional impression methods; the intraoral scanning operation time is not limited, and multiple additional scans can be performed; it is necessary to perform gingival retraction operations in advance, and the scanning must be completed quickly after the gingival retraction material is removed, which is easily blocked by the gums, and the effect of obtaining the subgingival edge morphology is not as good as the traditional method; as the number of preparations increases, the scanning accuracy will decrease, and there is a significant deviation in the intraoral scanning of long-span multi-unit preparations, which cannot meet the requirements of clinical applications.

[0005] Individual tooth tray method: first make a preliminary impression of the preparation, cast a model, and use self-curing resin to make individual tooth trays for each preparation on the model. When making the final impression, put each individual tooth tray in place separately, make a partial impression of each preparation, and then use a conventional tray to make an impression of the complete dentition including the individual tooth trays, and take them out as a whole. Advantages: The individual tooth tray fits the surface of the preparation more closely, the impression thickness is thin and uniform, and the deformation is smaller; there is no need to retract the gums in advance, and the individual tooth trays can press the gums open while they are in place, pressing the impression material into the gingival sulcus, achieving the effect of mechanical gingival retraction and better obtaining the subgingival edge morphology; for multiple preparations, individual tooth trays can be put in place separately, and then taken out as a whole, with sufficient operating time, low operating technical difficulty, and high impression success rate. Disadvantages: It is necessary to make an initial impression and pour a model to make a tooth tray, which will increase the number of patient visits; the traditional manual production of tooth trays is cumbersome, inefficient, and has certain errors, and the volatile self-curing resin monomer is irritating and affects the health of the operator. In particular, the production of multiple prepared tooth trays is time-consuming and labor-intensive, and has low clinical practicality (the traditional manual production of tooth trays steps are as follows: take an initial impression, pour a model, spread 0.5mm-1mm buffer wax on the surface of the prepared body to reserve an impression gap, carve a 0.5mm wide and deep groove on the outer edge of the edge line, apply a release agent, and use self-curing resin to make a 0.5mm-1mm thick tooth tray, with a little buffer at the edge to allow the impression material to overflow; a handle is made on the top of the tray to facilitate wearing and prevent demolding; when there are multiple preparations, ensure that each tooth tray can be in place at the same time without interfering with each other). Summary of the invention

[0006] A main purpose of the present disclosure is to overcome at least one defect of the above-mentioned prior art and provide a crown and bridge restoration tooth tray and a design and production method thereof.

[0007] According to a first aspect of the present invention, a method for designing and manufacturing a tooth tray for crown and bridge restoration is provided, comprising:

[0008] Obtain the scan data of crown and bridge preparations;

[0009] Import the scan data of crown and bridge preparation to form a virtual preparation;

[0010] Design the placement direction of the individual tooth tray according to the placement path of the virtual preparation, and select the line connecting the surrounding gingival margins of the virtual preparation as the edge line of the individual tooth tray;

[0011] Generate the outer surface morphology of the tooth tray main body on the virtual preparation body;

[0012] The outer surface of the cavity of the tooth tray body is designed on the virtual preparation. The thickness of the cavity is designed to be 0.2mm-1mm, and its edge ends at the inner side of the edge line of the tooth tray. The thickness of the square increases by 0.2mm-0.8mm, wherein the obtained outer surface morphology data of the accommodation cavity is the inner surface morphology data of the main body of the tooth tray;

[0013] The individual tooth tray body is obtained by using the individual tooth tray body outer surface morphology data and the individual tooth tray body inner surface morphology data.

[0014] In one embodiment of the present invention, after obtaining a tooth tray body, the method for designing and manufacturing a tooth tray for crown and bridge restoration further includes:

[0015] In the main body of the tooth tray A 1mm-3mm diameter area was selected on the in-plane surface, and the thickness was increased by 0.2mm-1mm along the normal direction to generate a tissue termination point.

[0016] In one embodiment of the present invention, after obtaining a tooth tray body, the method for designing and manufacturing a tooth tray for crown and bridge restoration further includes:

[0017] Adding a fixing portion to the outer surface of the main body of the tooth tray; and / or designing an impression material overflow hole on the surface of the main body of the tooth tray;

[0018] A virtual tooth tray is formed.

[0019] In one embodiment of the present invention, the method for obtaining the scan data of the crown and bridge preparation includes:

[0020] Make a preliminary impression of the crown and bridge preparation, pour a plaster model, scan the plaster model to obtain the crown and bridge preparation scanning data, or directly obtain the crown and bridge preparation scanning data through intraoral scanning.

[0021] In one embodiment of the present invention, when a plurality of adjacent virtual preparations have a common placement path, a connecting body portion is added to connect the corresponding portions of the preparations of each tooth tray.

[0022] According to a second aspect of the present invention, there is provided a tooth tray for crown and bridge restoration, comprising:

[0023] A tooth tray body, wherein the tooth tray body includes a preparation body corresponding portion, and the preparation body corresponding portion has a receiving cavity for placing an impression material;

[0024] There are multiple preparation body corresponding parts, and the multiple preparation body corresponding parts are connected to obtain an impression having multiple preparation bodies.

[0025] In one embodiment of the present invention, each preparation body corresponding part includes Surface part;

[0026] Among them, several A tissue termination point is disposed on at least one of the surface portions, and the tissue termination point is located within the accommodating cavity.

[0027] In one embodiment of the present invention, an overflow hole is provided on the corresponding portion of the preparation body, and the overflow hole is communicated with the accommodating cavity.

[0028] In one embodiment of the present invention, the tooth tray for crown and bridge restoration is a tooth tray for multiple posterior crown and bridge restorations, and the main body of the tooth tray further includes:

[0029] A first fixing portion, the first fixing portion being connected to at least one of the plurality of preparation body corresponding portions;

[0030] The first fixing portion is located outside the accommodating cavity and is located at the corresponding portion of the prepared body. Square side.

[0031] In one embodiment of the present invention, the tooth tray for crown and bridge restoration is a tooth tray for multiple anterior tooth crown and bridge restoration, and the tooth tray body further includes:

[0032] A second fixing portion, wherein at least one of the plurality of preparation body corresponding portions is provided with the second fixing portion;

[0033] The second fixing portion is located outside the accommodating cavity and on the lingual side of the corresponding portion of the prepared body.

[0034] The design and production method of the crown and bridge restoration tooth tray of the present invention forms a virtual preparation after acquiring the crown and bridge preparation scanning data, and forms the outer surface morphology data and inner surface morphology data of the tooth tray body in sequence based on the virtual preparation, and obtains the tooth tray body using the outer surface morphology data and the inner surface morphology data of the tooth tray body, and obtains the virtual tooth tray using the tooth tray body data. The crown and bridge restoration tooth tray adopts digital design to obtain the virtual tooth tray data, and obtains the tooth tray through 3D printing, which can replace traditional manual production, and is conducive to improving the efficiency and accuracy of tooth tray production and improving the quality of crown and bridge restoration impressions. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various objects, features and advantages of the present disclosure will become more apparent by considering the following detailed description of preferred embodiments of the present disclosure in conjunction with the accompanying drawings. The accompanying drawings are merely exemplary illustrations of the present disclosure and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always refer to the same or similar parts. Among them:

[0036] Figure 1 is a flow chart showing a method for designing and manufacturing a tooth tray for crown and bridge restoration according to an exemplary embodiment;

[0037] Figure 2 is a flow chart showing a method for designing and manufacturing a tooth tray for crown and bridge restoration according to another exemplary embodiment;

[0038] Figure 3 is a schematic structural diagram of a tooth tray for repairing multiple posterior crown bridges according to an exemplary embodiment;

[0039] Figure 4 It is a schematic structural diagram of a tooth tray for repairing multiple anterior crown bridges according to an exemplary embodiment.

[0040] The following are the descriptions of the reference numerals:

[0041] 10. tooth tray body; 11. preparation body corresponding part; 12. accommodating cavity; 13. tissue termination point; 14. first fixing part; 15. second fixing part; 16. overflow hole. DETAILED DESCRIPTION

[0042] Typical embodiments that embody the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can have various changes in different embodiments without departing from the scope of the present disclosure, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present disclosure.

[0043] In the following description of different exemplary embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part of the present disclosure and in which different exemplary structures, systems and steps that can implement multiple aspects of the present disclosure are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present disclosure. Moreover, although the terms "above", "between", "within", etc. may be used in this specification to describe different exemplary features and elements of the present disclosure, these terms are used herein only for convenience, such as according to the direction of the examples in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the present disclosure.

[0044] One embodiment of the present invention provides a method for designing and manufacturing a tooth tray for crown and bridge restoration, such as Figure 1 As shown, the design and production method of a tooth tray for crown and bridge restoration includes: obtaining the scan data of the crown and bridge preparation body; calling the scan data of the crown and bridge preparation body to form a virtual preparation body; designing the positioning direction of the tooth tray according to the positioning path of the virtual preparation body, and selecting the connecting line of the gum margin around the virtual preparation body as the edge line of the tooth tray; generating the outer surface morphology of the main body of the tooth tray based on the virtual preparation body; designing the outer surface morphology of the receiving cavity of the main body of the tooth tray based on the virtual preparation body, the thickness of the receiving cavity is designed to be 0.2mm-1mm, and its edge ends at the inner side of the edge line of the tooth tray, and the receiving cavity is The square thickness increases by 0.2mm-0.8mm, wherein the outer surface morphology of the accommodating cavity is the inner surface morphology of the individual tooth tray body, and the designed outer surface morphology of the accommodating cavity of the individual tooth tray body is the designed inner surface morphology of the individual tooth tray body, and the obtained outer surface morphology data of the accommodating cavity is the inner surface morphology data of the individual tooth tray body; the individual tooth tray body is obtained using the outer surface morphology data of the individual tooth tray body and the inner surface morphology data of the individual tooth tray body.

[0045] The design and production method of a tooth tray for crown and bridge restoration according to an embodiment of the present invention forms a virtual preparation after acquiring the scanned data of the crown and bridge preparation, and forms the outer surface morphology and inner surface morphology of the main body of the tooth tray in sequence based on the virtual preparation, and then obtains the main body of the tooth tray using the outer surface morphology data and the inner surface morphology data of the main body of the tooth tray, and obtains the virtual tooth tray using the main body data of the tooth tray. The tooth tray for crown and bridge restoration adopts digital design to obtain the virtual tooth tray data, and obtains the tooth tray through 3D printing, which can replace traditional manual production, and is conducive to improving the efficiency and accuracy of the production of the tooth tray, and improving the quality of the crown and bridge restoration impression.

[0046] In one embodiment, the receiving cavity The increased thickness is the distance that the gums can be pushed away when the individual tooth tray is in place. The accommodating cavity can be understood as an entity located between the inner surface morphology of the individual tooth tray body and the virtual preparation. After the accommodating cavity is formed, the outer surface morphology of the individual tooth tray body and the accommodating cavity are separated to obtain the individual tooth tray body data. Among them, the data forming the outer surface morphology of the individual tooth tray body is the outer surface morphology data of the individual tooth tray body, and the outer surface morphology data of the accommodating cavity formed is the inner surface morphology data of the individual tooth tray body.

[0047] In one embodiment, after the crown and bridge preparation scanning data is obtained, the virtual preparation is formed using the data, and the outer and inner surfaces of the tooth tray body are subsequently formed based on the virtual preparation. In order to generate the virtual preparation, the crown and bridge preparation scanning data can be imported into a three-dimensional modeling software, such as a dental digital design software.

[0048] In one embodiment, after obtaining a tooth tray body, the method for designing and manufacturing a tooth tray for crown and bridge restoration further comprises: The inner surface of the surface selects a 1mm-3mm diameter area, thickens 0.2mm-1mm along the normal direction, and generates a tissue termination point. The setting of the tissue termination point can assist the positioning of the individual tooth tray, improve the accuracy of the positioning of the individual tooth tray, and ensure the quality of the impression. Among them, the data finally used to make the individual tooth tray is the data of the individual tooth tray body with the tissue termination point.

[0049] In one embodiment, after obtaining the tooth tray body, the design and production method of the crown and bridge restoration tooth tray also includes: adding a fixing portion to the outer surface of the tooth tray body; and / or, designing an impression material overflow hole on the surface of the tooth tray body; forming a virtual tooth tray, and obtaining data for forming the virtual tooth tray.

[0050] In one embodiment, the scanned data of the crown and bridge preparation can be transferred into the dental digital design software, and the prefabricated anatomical crown database of the dental digital design software can be called to generate the outer surface morphology of the main body of the tooth tray. The outer surface morphology of the main body of the tooth tray can be generated using the existing prefabricated anatomical crown database, or can be obtained through other databases, and can be manually adjusted for specific databases.

[0051] In one embodiment, the body data of the tooth tray can be imported into the reverse engineering software to generate the tissue termination point, the fixing part and the impression material overflow hole in the imported reverse engineering software.

[0052] In one embodiment, Figure 2 As shown, the design and production method of a tooth tray for crown and bridge restoration includes: obtaining the scan data of the crown and bridge preparation; calling the scan data of the crown and bridge preparation into the dental digital design software, selecting the corresponding tooth position, and selecting the inner crown + full crown design module; designing the positioning direction of the tooth tray, selecting the line connecting the gingival margin around the virtual preparation as the edge line of the tooth tray, and setting the thickness of the interface adhesive of the model; calling the prefabricated anatomical crown database of the dental digital design software to generate the outer crown shape, that is, the outer surface shape of the main body of the tooth tray; using the inner crown design module to design the shape of the receiving cavity of the main body of the tooth tray, the shape of the receiving cavity is the shape of the inner crown, the thickness is designed to be 0.35mm-0.65mm, and its edge ends at the inner side of the edge line of the tooth tray, and the receiving cavity The thickness of each tooth tray is increased by 0.2mm-0.8mm; the outer crown and the inner crown are separated to obtain the outer crown data, which includes the data of the inner surface morphology of the outer crown and the data of the outer surface morphology of the outer crown. The data of the inner surface morphology of the outer crown is the data of the outer surface morphology of the inner crown, that is, to obtain the main body data of each tooth tray; the main body data of each tooth tray is imported into the reverse engineering software, and the main body data of each tooth tray is obtained. A 1mm-3mm diameter area is selected on the inner surface, and the area is thickened by 0.2mm-1mm along the normal direction to generate a tissue termination point; a fixing portion is added to the outer surface of the individual tooth tray body; an impression material overflow hole is designed on the surface of the individual tooth tray body to form a virtual individual tooth tray, and the data of the virtual individual tooth tray is saved in STL format, and individual tooth trays made of resin or metal are manufactured using 3D printing equipment.

[0053] In one embodiment, the method for obtaining the crown and bridge preparation scanning data includes: making a preliminary impression of the crown and bridge preparation, pouring a plaster model, scanning the plaster model to obtain the crown and bridge preparation scanning data, or directly obtaining the crown and bridge preparation scanning data through intraoral scanning.

[0054] In one embodiment, when a plurality of adjacent virtual preparations have a common placement path, a connecting body portion is added to connect the corresponding portions of each preparation of each tooth tray.

[0055] In one embodiment, a method for designing and manufacturing a tooth tray for crown and bridge restoration includes the following steps:

[0056] 1) Make a preliminary impression of the crown and bridge preparation, pour a plaster model, scan the plaster model to obtain the crown and bridge preparation scanning data, or directly obtain the crown and bridge preparation scanning data through intraoral scanning;

[0057] 2) Transfer the scanned data of the crown and bridge preparations into the dental digital design software, select the corresponding tooth position, and select the inner crown + full crown design module. If multiple adjacent preparations have a common orientation, a connector can be added to design them as linked crowns. When making a tooth tray, after determining the tooth position to be repaired, the scanned data of the crown and bridge preparations obtained must at least include the data of the tooth position to be repaired and the adjacent tooth position. Therefore, after transferring the data into the dental digital design software, the corresponding tooth position needs to be selected. This design and production method can also be applied to crown and bridge restoration cases with multiple preparations, that is, the restoration design type corresponding to multiple adjacent preparations with a common orientation is designed as a linked crown by adding a connector. Here, Figure 3 and Figure 4 It can be understood that a plurality of preparation body corresponding parts 11 are connected via a connecting body part.

[0058] 3) Design the positioning direction of the individual tooth tray, select the line connecting the gingival margins around the preparation as the edge line of the individual tooth tray, and set the thickness of the interface adhesive to 0 mm or the default value.

[0059] 4) Calling the prefabricated anatomical crown database of the dental digital design software to generate the outer surface morphology of the outer crown, i.e., the outer surface morphology of the main body of the tooth tray, with a thickness of 0.2mm-0.25mm at the edge. If multiple adjacent preparations have a common positioning direction, a connector can be added to connect the outer crowns (i.e., multiple preparation corresponding parts 11 are connected through the connector part), and the outer crown shape is adjusted to a suitable size and direction, and the adjacent surface does not contact the adjacent teeth;

[0060] 5) Design the shape of the inner crown, i.e. the shape of the accommodating cavity, with a thickness of 0.2mm-1mm, optionally 0.5mm, and the edge ends at the inner side of the edge of the outer crown. The thickness of the square increases from 0.2mm to 0.8mm to provide a corresponding amount of sinking, which has the effect of pressing open the gums;

[0061] 6) Separate the outer crown and the inner crown. The outer crown data is the virtual tooth tray body, and the inner crown data is the space form required to accommodate the impression material;

[0062] 7) Import the separated gear tray body data into the reverse engineering software. A 1mm-3mm diameter area is selected on the inner surface of the plane, and thickened along the normal direction, with the thickness being consistent with the thickness of the inner crown, to generate a tissue termination point 13;

[0063] 8) Adding a T-shaped or cylindrical auxiliary retaining device (first fixing portion 14 or second fixing portion 15) on the surface of the individual tooth tray to ensure that the individual tooth tray can be fixed in the impression of the conventional complete dentition tray after the impression is made;

[0064] 9) An impression material overflow hole 16 is designed on the surface of each tooth tray. The overflow hole 16 not only enables the impression material to overflow, but also has a fixing function;

[0065] 10) Save the generated individual tooth tray data in STL format, and use 3D printing equipment to make individual tooth trays made of resin or metal. After completing step 9, the corresponding virtual individual tooth tray is obtained, and the various data of the virtual individual tooth tray can be obtained, and finally the individual tooth tray is made through 3D printing equipment.

[0066] In one embodiment, the dental digital design software may adopt the dentalsystem2018 version software from the Danish 3shape company.

[0067] In one embodiment, the three-dimensional reverse engineering software may be Geomagic Studio 2014 version software from Raindrop Geomagic, Inc. of the United States.

[0068] In one embodiment, in combination Figure 3 and Figure 4 The cavity wall of the accommodating cavity 12 is the outer surface shape of the accommodating cavity, and the thickness of the accommodating cavity is the thickness of the impression material between the cavity wall of the accommodating cavity 12 and the prepared body when making the impression.

[0069] One embodiment of the present invention also provides a crown bridge restoration tooth tray, please refer to Figure 3 and Figure 4 The tooth tray for crown and bridge restoration includes: a tooth tray main body 10, and the tooth tray main body 10 includes a preparation body corresponding part 11, and the preparation body corresponding part 11 has a receiving cavity 12 for placing an impression material; wherein, there are multiple preparation body corresponding parts 11, and the multiple preparation body corresponding parts 11 are connected to obtain an impression with multiple preparation bodies.

[0070] The crown and bridge restoration tooth tray of one embodiment of the present invention can be used to obtain an impression with multiple preparations, that is, to make an impression with multiple tooth positions. The preparation corresponding part 11 is an empty shell with an opening, and the cavity of the shell is the accommodating cavity 12, which is used to fill the impression material when making the impression.

[0071] like Figure 3 and Figure 4 As shown, each preparation body corresponding part 11 includes Surface part; among them, multiple At least one of the surface parts is provided with a tissue termination point 13, and the tissue termination point 13 is located in the accommodating cavity 12. The provision of the tissue termination point 13 can assist the positioning of the tooth tray and improve the accuracy of the positioning of the tooth tray.

[0072] In one embodiment, the tissue termination point 13 is The projected area on the surface portion is A, 1 mm ≤ A ≤ 3 mm. Optionally, A = 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm.

[0073] In one embodiment, the tissue termination point 13 is along The thickness of the surface portion in the normal direction is B, 0.2 mm ≤ B ≤ 1 mm. Optionally, B = 0.2 mm, 0.3 mm, 0.5 mm, 0.7 mm or 1 mm. The projection area on the surface part and the tissue end point 13 along The thickness of the surface part in the normal direction needs to be moderate. If it is too small, it will be impossible to print, and if it is too large, it will affect the mold accuracy. B is roughly 0.2mm-1mm, which is consistent with the accommodating cavity. The thickness of the square is the same, that is The thickness of the square impression material.

[0074] like Figure 3 and Figure 4 As shown, an overflow hole 16 is provided on the preparation body corresponding portion 11, and the overflow hole 16 is connected to the accommodating cavity 12. There can be multiple overflow holes 16, which are used for the impression to overflow and form a fixed body in the overflow holes 16.

[0075] like Figure 3 As shown, the crown and bridge restoration tooth tray is a plurality of posterior crown and bridge restoration tooth trays, and the tooth tray body 10 further includes: a first fixing portion 14, the first fixing portion 14 is connected to at least one of the plurality of preparation corresponding portions 11; wherein the first fixing portion 14 is located outside the accommodating cavity 12 and is located at the preparation corresponding portion 11 The side of the preparation body corresponding part 11 is the side away from the cavity opening of the accommodating cavity 12. The plurality of preparation body corresponding parts 11 are connected to the first fixing part 14, and the first fixing part 14 and the cavity opening of the accommodating cavity 12 are respectively located on both sides of the preparation body corresponding part 11. The setting of the first fixing part 14 ensures that the tooth tray can be fixed in the impression of the conventional complete dentition tray after the impression is made.

[0076] In one embodiment, the shape of the first fixing portion 14 can be selected according to actual use, such as cylindrical, cubic, etc. A connecting body is provided between the first fixing portion 14 and the bottom of the preparation body corresponding portion 11, such as Figure 3 As shown, the cross-section of the connecting body and the first fixing portion 14 forms a T-shape.

[0077] like Figure 4 As shown, the tooth tray for crown and bridge restoration is a tooth tray for multiple anterior tooth crown and bridge restoration, and the tooth tray body 10 also includes: a second fixing portion 15, and at least one of the multiple preparation body corresponding portions 11 is provided with the second fixing portion 15; wherein the second fixing portion 15 is located outside the accommodating cavity 12, and is located on the lingual side of the preparation body corresponding portion 11. The provision of the second fixing portion 15 ensures that the tooth tray can be fixed in the impression of a conventional complete dentition tray after the impression is made. The second fixing portion 15 can be selectively provided on certain preparation body corresponding portions 11, and its structural form is also selectable, such as cylindrical, cubic, etc.

[0078] In one embodiment, a tooth tray for a crown and bridge restoration is obtained by using the above-mentioned design and production method for a tooth tray for a crown and bridge restoration.

[0079] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and example embodiments are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0080] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for designing and manufacturing a tooth tray for crown and bridge restoration, characterized in that: include: Obtain the scan data of crown and bridge preparations; Importing the scan data of the crown and bridge preparation to form a virtual preparation; Designing the placement direction of a tooth tray according to the placement path of the virtual preparation, and selecting the line connecting the surrounding gingival margins of the virtual preparation as the edge line of the tooth tray; Generating an outer surface morphology of a tooth tray main body on the virtual preparation body; The outer surface morphology of the tooth tray main body receiving cavity is designed on the virtual preparation body. The thickness of the receiving cavity is designed to be 0.2mm-1mm, and its edge stops at the inner side of the edge line of the tooth tray. The thickness of the square increases by 0.2mm-0.8mm, wherein the obtained outer surface morphology data of the accommodation cavity is the inner surface morphology data of the main body of the tooth tray; Obtaining a tooth tray body using the outer surface morphology data of the tooth tray body and the inner surface morphology data of the tooth tray body; In the tooth tray body A 1mm-3mm diameter area was selected on the in-plane surface, and the thickness was increased by 0.2mm-1mm along the normal direction to generate a tissue termination point.

2. The design and production method of a tooth tray for crown and bridge restoration according to claim 1, characterized in that: After obtaining the tooth tray body, the design and production method of the crown and bridge restoration tooth tray further includes: Adding a fixing portion on the outer surface of the tooth tray body; and / or designing an impression material overflow hole on the surface of the tooth tray body; A virtual tooth tray is formed.

3. The design and production method of a tooth tray for crown and bridge restoration according to claim 1, characterized in that: The method for obtaining the scan data of the crown and bridge preparation includes: A preliminary impression of the crown and bridge preparation is made, a plaster model is poured, and the plaster model is scanned to obtain the scan data of the crown and bridge preparation, or the scan data of the crown and bridge preparation is directly obtained through intraoral scanning.

4. The design and production method of a tooth tray for crown and bridge restoration according to claim 1, characterized in that: When a plurality of adjacent virtual preparations have a common placement path, a connecting body portion is added to connect the corresponding portions of each preparation of each tooth tray.

5. A crown and bridge restoration tooth tray, used to implement the method according to claim 1, characterized in that: include: A tooth tray main body (10), wherein the tooth tray main body (10) comprises a preparation body corresponding portion (11), wherein the preparation body corresponding portion (11) has a receiving cavity (12) for placing an impression material; There are a plurality of the preparation body corresponding parts (11), and the plurality of preparation body corresponding parts (11) are connected to obtain an impression having a plurality of preparation bodies; Each of the prepared body corresponding parts (11) comprises Surface part; Among them, multiple A tissue termination point (13) is provided on at least one of the surface parts, and the tissue termination point (13) is located in the accommodating cavity (12).

6. The crown and bridge restoration tooth tray according to claim 5, characterized in that: An overflow hole (16) is provided on the preparation body corresponding portion (11), and the overflow hole (16) is in communication with the accommodating cavity (12).

7. The crown and bridge restoration tooth tray according to any one of claims 5 to 6, characterized in that: The tooth tray for crown and bridge restoration is a tooth tray for multiple posterior tooth crown and bridge restorations, and the tooth tray body (10) further comprises: A first fixing portion (14), the first fixing portion (14) being connected to at least one of the plurality of preparation body corresponding portions (11); Wherein, the first fixing portion (14) is located outside the accommodating cavity (12) and is located at the corresponding portion (11) of the prepared body. Square side.

8. The crown and bridge restoration tooth tray according to any one of claims 5 to 6, characterized in that: The tooth tray for crown and bridge restoration is a tooth tray for multiple anterior tooth crown and bridge restorations, and the tooth tray body (10) further comprises: a second fixing portion (15), wherein at least one of the plurality of preparation body corresponding portions (11) is provided with the second fixing portion (15); Wherein, the second fixing portion (15) is located outside the accommodating cavity (12) and on the lingual side of the preparation body corresponding portion (11).

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