Single-thread tray, mold taking method and device based on single-thread tray, computer equipment, storage medium and computer program product

Abstract

The invention relates to a single-thread tray, a mold taking method and device based on the single-thread tray, computer equipment, a storage medium and a computer program product. The single-tooth tray comprises a bottom wall and two side walls, the bottom wall is in a square shape with round and blunt corners, and at least one overflow hole is formed in the bottom wall; the side walls are of a symmetrical structure, the side walls are isosceles trapezoids or squares with blunt corners, and at least one overflow hole is formed in each side wall; the connecting angles between the side walls and the bottom wall are all obtuse angles. By adopting the single-tooth tray, the accuracy of mold taking can be improved.

Description

Technical Field

[0001] The present application relates to the field of oral restoration, and in particular to a single-tooth tray, an impression-taking method and apparatus based on the single-tooth tray, a computer device, a storage medium, and a computer program product. Background Art

[0002] In the field of oral restoration, obtaining accurate impressions is a prerequisite for making high-quality restorations, and how to take impressions accurately is crucial.

[0003] In traditional technology, the impression material and impression tray are generally used in combination during the impression taking process; however, this method has a large impression range and strong retention force, and requires a large dislocation force, which can easily cause deformation of the impression material and result in low impression accuracy. Summary of the Invention

[0004] Based on this, it is necessary to provide a single tooth tray that can improve the accuracy of impression taking, an impression taking method, device, computer equipment, storage medium and computer program product based on the single tooth tray to address the above technical problems.

[0005] In a first aspect, the present application provides a single tooth tray comprising a bottom wall and two side walls;

[0006] The bottom wall is a square with rounded corners, and is provided with at least one overflow hole;

[0007] The side walls are symmetrical in structure, the side walls are isosceles trapezoids or squares with rounded corners, and the side walls are provided with at least one overflow hole;

[0008] The connection angles between the side walls and the bottom wall are both obtuse angles.

[0009] In one embodiment, the length of the bottom wall is between 0.8 cm and 3.2 cm, the width of the bottom wall is between 0.6 cm and 1.5 cm, and the thickness of the bottom wall is between 0.5 mm and 4 mm; the length of the edge of the side wall close to the bottom wall is equal to the width of the bottom wall, the length of the edge of the side wall away from the bottom wall is between 0.5 cm and 1.8 cm, the height of the side wall is between 0.5 cm and 1.5 cm, and the thickness of the side wall is between 0.5 mm and 4 mm; the distance between the side walls close to the bottom wall is between 0.6 cm and 2.2 cm, and the distance between the side walls away from the bottom wall is between 0.8 cm and 3.5 cm.

[0010] In one embodiment, the length of the bottom wall is 2.2 cm, the width of the bottom wall is 1.2 cm, and the thickness of the bottom wall is 2 mm; the length of the side wall away from the bottom wall is 1.2 cm, the height of the side wall is 0.7 cm, the thickness of the side wall is 2 mm, the distance between the side wall close to the bottom wall is 1.6 cm, and the distance between the side wall and the bottom wall is 2.1 cm.

[0011] In one embodiment, the overflow hole provided on the bottom wall and the overflow hole provided on the side wall both have a diameter of 1.2 mm.

[0012] In a second aspect, the present application provides a method for taking an impression based on a single tooth tray, comprising:

[0013] Acquiring the impression data of the target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and acquiring the oral scan data of the target tooth through the intraoral scanner; the single tooth tray is a single tooth tray described in a single tooth tray;

[0014] Performing inversion processing on the impression data to obtain positive mold data of the target tooth;

[0015] The oral scan data and the positive mold data are combined and processed to obtain the mold-taking result corresponding to the target tooth.

[0016] In one embodiment, after obtaining the impression data of the target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and obtaining the oral scan data of the target tooth through the intraoral scanner, the method further includes:

[0017] Performing format conversion processing on the impression data and the oral scan data respectively to obtain processed impression data and processed oral scan data of the target tooth; the data format of the processed impression data is the same as the data format of the processed oral scan data;

[0018] The step of performing inversion processing on the impression data to obtain positive mold data of the target tooth includes:

[0019] performing inversion processing on the processed impression data to obtain positive mold data of the target tooth;

[0020] The combining of the oral scan data and the positive mold data to obtain the mold result corresponding to the target tooth includes:

[0021] The processed oral scan data and the positive model data are combined to obtain the impression result corresponding to the target tooth.

[0022] In one embodiment, before merging the processed oral scan data and the positive mold data to obtain the mold result corresponding to the target tooth, the method further includes:

[0023] Performing cropping processing on the positive mold data to obtain processed positive mold data of the target tooth;

[0024] The processing of merging the processed oral scan data and the positive model data to obtain the impression result corresponding to the target tooth includes:

[0025] The processed oral scan data and the processed positive model data are combined to obtain the mold-taking result corresponding to the target tooth.

[0026] In a third aspect, the present application further provides an impression taking device based on a single tooth tray, comprising:

[0027] A data acquisition module, configured to acquire impression data of a target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and to acquire oral scan data of the target tooth through the intraoral scanner; the single tooth tray is a single tooth tray described in a single tooth tray;

[0028] A data reversal module, configured to perform reversal processing on the impression data to obtain positive mold data of the target tooth;

[0029] The data merging module is used to merge the oral scan data and the positive mold data to obtain the mold taking result corresponding to the target tooth.

[0030] In a fourth aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0031] Acquiring the impression data of the target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and acquiring the oral scan data of the target tooth through the intraoral scanner; the single tooth tray is a single tooth tray described in a single tooth tray;

[0032] Performing inversion processing on the impression data to obtain positive mold data of the target tooth;

[0033] The oral scan data and the positive mold data are combined and processed to obtain the mold-taking result corresponding to the target tooth.

[0034] In a fifth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0035] Acquiring the impression data of the target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and acquiring the oral scan data of the target tooth through the intraoral scanner; the single tooth tray is a single tooth tray described in a single tooth tray;

[0036] Performing inversion processing on the impression data to obtain positive mold data of the target tooth;

[0037] The oral scan data and the positive mold data are combined and processed to obtain the mold-taking result corresponding to the target tooth.

[0038] In a sixth aspect, the present application further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the following steps:

[0039] Acquiring the impression data of the target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and acquiring the oral scan data of the target tooth through the intraoral scanner; the single tooth tray is a single tooth tray described in a single tooth tray;

[0040] Performing inversion processing on the impression data to obtain positive mold data of the target tooth;

[0041] The oral scan data and the positive mold data are combined and processed to obtain the mold-taking result corresponding to the target tooth.

[0042] The above-mentioned single-tooth tray, the mold-taking method, device, computer equipment, storage medium and computer program product based on the single-tooth tray, the single-tooth tray includes a bottom wall and two side walls, the bottom wall is a square with rounded corners, and the bottom wall is provided with at least one overflow hole; the side walls are symmetrical structures, the side walls are isosceles trapezoids or squares with rounded corners, and the side walls are provided with at least one overflow hole; the connection angles between the side walls and the bottom wall are both obtuse angles. In this way, in the process of taking impressions using the single tooth tray, the rounded corners of the bottom wall and the side walls are designed to avoid bubbles or tears in the impression material caused by stress concentration during impression taking due to traditional sharp corners, ensuring the complete replication of the edge contour and reducing the distortion of the model edge; secondly, the overflow hole can be set to guide the discharge of excess impression material during the impression process, preventing material accumulation to form bubbles or excessive local pressure, so that the material can evenly fill the gaps between the tooth and surrounding tissues, ensuring the clarity of details in the impression; thirdly, the symmetrical isosceles trapezoidal or square side walls are connected with obtuse angles, so that the impression material is more evenly stressed during injection, reducing the material flow deviation caused by structural asymmetry; moreover, the obtuse angle design can also adapt to the physiological morphology of the tooth neck, fit closely to the gingival edge, avoid gaps during impression taking, thereby improving the fit between the model and the real tooth structure, which is conducive to improving the accuracy of impression taking. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 A schematic diagram of a three-dimensional design of a single tooth tray in one embodiment;

[0045] Figure 2 A schematic diagram of a side view of a single tooth tray in one embodiment;

[0046] Figure 3 A schematic diagram of a single tooth tray printed using a resin material in one embodiment;

[0047] Figure 4 A schematic diagram of a single tooth tray in which the impression material just fills the tray space in one embodiment;

[0048] Figure 5 Schematic diagram of a process for taking an impression based on a single dental tray in one embodiment;

[0049] Figure 6 A schematic flow chart of an impression-taking method based on a single dental tray in another embodiment;

[0050] Figure 7 A schematic diagram of making a post and core impression using a single tooth tray in one embodiment;

[0051] Figure 8 Schematic diagram of a single tooth post and core impression in one embodiment;

[0052] Figure 9 is a schematic diagram of a digital post and core impression in one embodiment;

[0053] Figure 10 A schematic diagram of obtaining a post and core positive mold in one embodiment;

[0054] Figure 11 A schematic diagram of a cut post and core positive mold in one embodiment;

[0055] Figure 12 is a schematic diagram of intraoral scanning data of a target tooth in one embodiment;

[0056] Figure 13 A schematic diagram of using software to match post and core positive mold data and oral scan data in one embodiment;

[0057] Figure 14 A schematic diagram of merging post and core positive mold data and oral scan data in one embodiment;

[0058] Figure 15 A schematic diagram of an occlusal photograph of a single-tooth tray impression in one embodiment;

[0059] Figure 16 A schematic diagram of a front view of a single tooth tray in one embodiment;

[0060] Figure 17 A schematic diagram of obtaining a post and core positive mold in another embodiment;

[0061] Figure 18 is a schematic diagram of intraoral scanning data of a target tooth in another embodiment;

[0062] Figure 19 A schematic diagram of merging post and core positive mold data and oral scan data in another embodiment;

[0063] Figure 20 A schematic diagram showing a comparison of using a partial tray and a single tooth tray to make a post and core impression in one embodiment;

[0064] Figure 21 1 is a structural block diagram of an impression taking device based on a single dental tray in one embodiment;

[0065] Figure 22 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0067] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0068] In the field of dental restorations, obtaining accurate impressions is a prerequisite for producing high-quality restorations. Traditional impression techniques rely on the combination of impression materials and impression trays. However, conventional trays must cover the target tooth and multiple adjacent teeth, or even the entire dentition. This large impression area not only increases patient discomfort such as nausea, but also requires significant force to dislocate the impression, which can easily cause deformation, particularly of the post and core impression. This reduces the fit of the restoration and increases treatment costs.

[0069] With the development of digital dental technology, the application of dental scanners has greatly improved the efficiency and convenience of impression taking, and can obtain three-dimensional data of abutment teeth in real time, while reducing the nausea and discomfort of traditional impressions. However, intraoral scanners also have their own limitations: (1) In the production of dental post and core, it is necessary to accurately obtain the root canal shape after root canal preparation. Because the root canal shape is narrow and deep, existing scanners cannot obtain accurate root canal shape; (2) When the edge of the preparation is deep below the gum, the gums and gingival sulcus fluid will interfere with the scanner imaging, and the edge of the preparation cannot be fully and accurately obtained, resulting in a shortened and loose edge of the restoration. Therefore, for single-tooth post and core restorations and situations where the edge of the preparation is deep below the gum, traditional impression technology is still needed to obtain a local impression, and then match it with the intraoral scan data to improve the accuracy of the intraoral scan data. However, the traditional tray impression range is large, and there is a problem of "over-impression" when repairing a single tooth, which not only wastes materials but also increases the risk of impression deformation. It is also easy to cause nausea and discomfort in patients, and it is difficult to achieve accurate impression taking.

[0070] Therefore, the present application provides a single-tooth tray that can solve the problem of difficulty in achieving accurate impression taking in traditional technologies, thereby achieving the effect of improving the accuracy of impression taking; at the same time, the single-tooth tray uses less material, which can reduce material costs, and the structure of the single-tooth tray can reduce the risk of impression deformation, and is not easy to cause nausea and discomfort to patients, which is conducive to improving the patient's comfort when taking impressions.

[0071] In an exemplary embodiment, Figure 1 and Figure 2 As shown, a single tooth tray is provided, comprising a bottom wall 1 and two side walls 2, the bottom wall 1 is a square with rounded corners, and the bottom wall 1 is provided with at least one overflow hole 3; the side walls 2 are symmetrical structures, the side walls 2 are isosceles trapezoids or squares with rounded corners, and the side walls 2 are provided with at least one overflow hole 4; the connection angles between the side walls 2 and the bottom wall 1 are both obtuse angles.

[0072] Among them, a single-tooth tray refers to an impression tray for taking impressions of a single tooth. It can be used for any tooth and there is no restriction on the position of the tooth.

[0073] Among them, the bottom and side walls of the single-tooth tray are provided with overflow holes (also called overflow hole structures), which are used for the overflow of the impression material, thereby increasing the retention between the impression material and the tray.

[0074] The connection angles between the side wall 2 and the bottom wall 1 are all obtuse angles. Figure 2 As shown, the angle α is greater than 90 degrees and less than 180 degrees.

[0075] For example, the single tooth tray is obtained by printing with resin material through additive manufacturing; the bottom wall 1 of the single tooth tray is designed with 4 overflow holes, and the side wall of the single tooth tray is designed with 2 overflow holes, such as Figure 3 In actual scenarios, the impression material just fills the tray space, and the impression material overflowing from the top and side wall edges is removed during use. Figure 4 shown.

[0076] In this embodiment, during the process of taking impressions using the single tooth tray, the rounded corners of the bottom wall and the side walls are designed to avoid bubbles or tears in the impression material caused by stress concentration at traditional sharp corners during impression taking, thereby ensuring that the edge contour is completely replicated and reducing the distortion of the model edge; secondly, the overflow hole is set to guide the discharge of excess impression material during the impression taking process, preventing material accumulation to form bubbles or excessive local pressure, so that the material can evenly fill the gaps between the tooth and surrounding tissues, ensuring the clarity of details in the impression; furthermore, the symmetrical isosceles trapezoidal or square side walls are connected with obtuse angles, so that the impression material is more evenly stressed during injection, reducing the material flow deviation caused by structural asymmetry; moreover, the obtuse angle design can also adapt to the physiological morphology of the tooth neck, closely fit the gingival edge, avoid gaps during impression taking, thereby improving the fit between the model and the real tooth structure, and helping to improve the accuracy of impression taking.

[0077] In an exemplary embodiment, Figure 1 and Figure 2 As shown, the length a of the bottom wall 1 is between 0.8 cm and 3.2 cm, the width b of the bottom wall 1 is between 0.6 cm and 1.5 cm, and the thickness g of the bottom wall 1 is between 0.5 mm and 4 mm; the length of the edge h of the side wall 2 close to the bottom wall 1 is equal to the width b of the bottom wall 1, the length of the edge e of the side wall 2 away from the bottom wall 1 is between 0.5 cm and 1.8 cm, the height d of the side wall 2 is between 0.5 cm and 1.5 cm, and the thickness i of the side wall 2 is between 0.5 mm and 4 mm; the distance c between the side wall 2 close to the bottom wall 1 is between 0.6 cm and 2.2 cm, and the distance f between the side wall 2 away from the bottom wall 1 is between 0.8 cm and 3.5 cm.

[0078] Exemplarily, the length a of the bottom wall 1 is greater than the distance c between the side wall 2 and the bottom wall 1, and the difference ac between the two is between 0.4 cm and 1.0 cm, that is, space is left at both ends of the bottom wall to serve as tray handles, which is convenient for users to hold, position and demold; the distance f between the side wall 2 and the bottom wall 1 is greater than the distance c between the side wall 2 and the bottom wall 1, and the difference ac between the two is between 0.4 cm and 1.0 cm.

[0079] In this embodiment, by designing the parameter range of the bottom wall, side wall and other structural dimensions of the single tooth tray, it is possible to adapt to achieve a balance between accurate impression taking and operational convenience, thereby ensuring the accuracy of impression material filling and improving the adaptability of clinical operations, which is conducive to improving the accuracy of the impression taking results.

[0080] In an exemplary embodiment, the length a of the bottom wall 1 is 2.2 cm, the width b of the bottom wall 1 is 1.2 cm, and the thickness g of the bottom wall 1 is 2 mm; the length of the edge e of the side wall 2 away from the bottom wall 1 is 1.2 cm, the height d of the side wall 2 is 0.7 cm, the thickness i of the side wall 2 is 2 mm, the distance c between the side wall 2 and the bottom wall 1 is 1.6 cm, and the distance f between the side wall 2 and the bottom wall 1 is 2.1 cm.

[0081] Exemplarily, the difference between the length a of the bottom wall 1 and the distance c between the side wall 2 close to the bottom wall 1 is 0.6 cm, and the difference between the distance f between the side wall 2 away from the bottom wall 1 and the distance c between the side wall 2 close to the bottom wall 1 is 0.5 cm.

[0082] In this embodiment, by designing the specific parameters of the bottom wall, side wall and other structural dimensions of the single-tooth tray, it is possible to avoid the patient's strong foreign body sensation in the mouth and inconvenient operation due to excessive size. At the same time, the rigid thickness and trapezoidal structure ensure the stability of the tray position during the impression process, which is conducive to improving the reliability of the impression results.

[0083] In an exemplary embodiment, the overflow hole 3 provided on the bottom wall 1 and the overflow hole 4 provided on the side wall 2 both have a diameter of 1.2 mm.

[0084] In this embodiment, overflow holes with a diameter of 1.2 mm are provided on the bottom wall and side walls of the single tooth tray, so that the material can overflow at a uniform speed under the action of capillary action and gravity, thereby avoiding excessive local pressure caused by accumulation of impression material, which may lead to deformation of fine structures such as the gingival margin.

[0085] In an exemplary embodiment, Figure 5 As shown, a method for taking an impression based on a single tooth tray is provided. This embodiment uses the method applied to a server as an example for illustration; it is understandable that the method can also be applied to a terminal, and can also be applied to a system including a terminal and a server, and implemented through interaction between the terminal and the server. The terminal can be, but is not limited to, various personal computers, laptops, smartphones, and tablet computers; the server can be implemented as an independent server or a server cluster consisting of multiple servers. In this embodiment, the method includes the following steps:

[0086] Step S501, obtaining impression data of the target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and obtaining oral scan data of the target tooth through the intraoral scanner; the single tooth tray is a single tooth tray of a single tooth tray.

[0087] The target tooth may be an affected tooth.

[0088] Among them, the intraoral scanner refers to a digital device that obtains the three-dimensional morphology of teeth and surrounding tissues.

[0089] Among them, the impression data refers to the physical impression data obtained by using a single tooth tray to carry the impression material.

[0090] Among them, oral scanning data refers to the three-dimensional point cloud data of the target teeth and surrounding tissues obtained directly in the oral cavity.

[0091] It should be noted that for scanning the subgingival margin, due to the influence of saliva, gingival sulcus fluid or blood, the impression margin (oral scan data) obtained by direct scanning is not clear. At this time, the traditional silicone rubber impression can obtain a clear subgingival margin (impression data), and the data can be merged to improve the accuracy of the scan.

[0092] Exemplarily, the server obtains the diagnosis and treatment requirement information corresponding to the target tooth, and inputs the diagnosis and treatment requirement information into the importance prediction model to obtain the predicted importance of the diagnosis and treatment requirement information; then, the server filters out the diagnosis and treatment requirement information with a predicted importance greater than a preset importance from each diagnosis and treatment requirement information, as the key diagnosis and treatment requirement information corresponding to the target tooth; then, the server filters out the candidate intraoral scanner that matches the key diagnosis and treatment requirement information from each candidate intraoral scanner, as the intraoral scanner associated with the target tooth; then, the server obtains the impression data of the target tooth based on the impression material carried by the single tooth tray, and obtains the intraoral scan data of the target tooth through the intraoral scanner associated with the target tooth.

[0093] Step S502: performing inversion processing on the impression data to obtain positive mold data of the target tooth.

[0094] The positive mold data refers to the three-dimensional model data obtained by digitally reversing the impression data.

[0095] Exemplarily, the server performs feature extraction processing on the impression data to obtain a feature vector of the impression data, and inputs the feature vector of the impression data into a trained positive mold data prediction model (such as a convolutional neural network model), and reverses the impression data through the trained positive mold data prediction model to obtain the positive mold data of the target tooth.

[0096] Step S503: Merge the oral scan data and the positive mold data to obtain the mold result corresponding to the target tooth.

[0097] Among them, the mold-taking result refers to a three-dimensional digital model containing complete anatomical structure and clinical reference information generated by integrating oral scan data and positive mold data.

[0098] Exemplarily, the server determines a first weight corresponding to the oral scan data and a second weight corresponding to the positive mold data, and sums the oral scan data and the positive mold data according to the first weight and the second weight to obtain a mold result corresponding to the target tooth.

[0099] In the above-mentioned impression-taking method based on a single tooth tray, the impression data of the target tooth is obtained through the single tooth tray and intraoral scanner associated with the target tooth, and the oral scan data of the target tooth is obtained through the intraoral scanner, and the impression data is reversed to obtain the positive mold data of the target tooth, and then the oral scan data and the positive mold data are merged to obtain the impression-taking result corresponding to the target tooth. In this way, during the impression-taking process, the rounded corners, overflow holes and obtuse-angle connection design of the single tooth tray can ensure that the impression material evenly fills the tooth gaps and discharges excess material, avoids bubbles and edge distortion, and enables the acquired impression data to accurately reflect the tooth morphology, gingival margin and other details; secondly, by inverting the impression data, the concave area of ​​the tooth can be accurately restored to the convex structure of the positive mold, and through the reverse conversion of the geometric shape, the subtle deformation errors that may occur during the curing process of the impression material are eliminated, making the positive mold data closer to the true three-dimensional shape of the tooth; thirdly, through the complementary fusion of oral scan data and positive mold data, the oral scan data supplements the surface details of the positive mold, and the positive mold data corrects the soft tissue interference errors that may exist in the oral scan, thereby eliminating the limitations of a single data source, and ultimately making the impression-taking result have both geometric accuracy and surface feature integrity, which is conducive to improving the accuracy of impression-taking.

[0100] In an exemplary embodiment, the above-mentioned step S501, after obtaining the impression data of the target tooth through the single tooth tray associated with the target tooth and the intraoral scanner, and obtaining the oral scan data of the target tooth through the intraoral scanner, specifically includes the following contents: format conversion processing is performed on the impression data and the oral scan data respectively to obtain processed impression data and processed oral scan data of the target tooth; the data format of the processed impression data is the same as the data format of the processed oral scan data.

[0101] Then, the above step S502, performing inversion processing on the impression data to obtain the positive mold data of the target tooth, specifically includes the following contents: performing inversion processing on the processed impression data to obtain the positive mold data of the target tooth.

[0102] Then, the above step S503, merging the oral scan data and the positive model data to obtain the impression result corresponding to the target tooth, specifically includes the following content: merging the processed oral scan data and the positive model data to obtain the impression result corresponding to the target tooth.

[0103] The processed impression data refers to the impression data after format conversion.

[0104] The processed oral scan data refers to the oral scan data after format conversion.

[0105] It should be noted that the data format of the processed impression data and the data format of the processed oral scan data are both PLY (Polygon File Format, a data format for storing three-dimensional graphic objects) format.

[0106] Exemplarily, the server determines the data conversion method corresponding to the impression data based on the current data format and target data format of the impression data, and performs format conversion processing on the impression data according to the data conversion method corresponding to the impression data to obtain the processed impression data of the target tooth; then, the server determines the data conversion method corresponding to the oral scan data based on the current data format and target data format of the oral scan data, and performs format conversion processing on the oral scan data according to the data conversion method corresponding to the oral scan data to obtain the processed oral scan data of the target tooth; then, the server performs feature extraction processing on the processed impression data to obtain the feature vector of the processed impression data, and inputs the feature vector of the processed impression data into the trained positive mold data prediction model, and reverses the processed impression data through the trained positive mold data prediction model to obtain the positive mold data of the target tooth; then, the server determines the first weight corresponding to the processed oral scan data and the second weight corresponding to the positive mold data, and sums the processed oral scan data and the positive mold data according to the first weight and the second weight to obtain the impression result corresponding to the target tooth.

[0107] In this embodiment, by uniformly converting the impression data and oral scan data into the same data format, the data incompatibility problem caused by format differences can be solved, so that the processed impression data and oral scan data can interact efficiently in the same computing environment, laying a unified foundation for subsequent data fusion, feature extraction and other operations.

[0108] In an exemplary embodiment, the above step S503, before merging the processed oral scan data and the positive mold data to obtain the mold-taking result corresponding to the target tooth, specifically includes the following contents: cropping the positive mold data to obtain the processed positive mold data of the target tooth.

[0109] Then, the above step S503, merging the processed oral scan data and the positive mold data to obtain the mold taking result corresponding to the target tooth, specifically includes the following content: merging the processed oral scan data and the processed positive mold data to obtain the mold taking result corresponding to the target tooth.

[0110] The processed positive mold data refers to the positive mold data after the cutting process.

[0111] Exemplarily, the server inputs the positive mold data into the importance prediction model to obtain the predicted importance of the positive mold data; then, the server filters out the positive mold data whose predicted importance is less than the preset importance from each positive mold data as the positive mold data to be cropped in the positive mold data; then, the server crops the positive mold data to be cropped in the positive mold data to obtain the processed positive mold data of the target tooth; then, the server determines the first weight corresponding to the processed oral scan data and the second weight corresponding to the processed positive mold data, and sums the processed oral scan data and the processed positive mold data according to the first weight and the second weight to obtain the mold taking result corresponding to the target tooth.

[0112] In this embodiment, by cropping the positive model data, the target tooth-related areas can be accurately extracted, redundant data can be removed to improve model processing efficiency, and interference from irrelevant areas can be avoided, providing more efficient and accurate data support for digital oral diagnosis and treatment.

[0113] In an exemplary embodiment, Figure 6 As shown, another method for taking an impression based on a single tooth tray is provided. This method is described by taking the application of the method to a server as an example, and specifically includes the following steps:

[0114] Step S601, obtaining impression data of the target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and obtaining oral scan data of the target tooth through the intraoral scanner; the single tooth tray is a single tooth tray of a single tooth tray.

[0115] Step S602 , format conversion is performed on the impression data and the oral scan data to obtain processed impression data and processed oral scan data of the target tooth; the data format of the processed impression data is the same as the data format of the processed oral scan data.

[0116] Step S603: performing inversion processing on the processed impression data to obtain positive mold data of the target tooth.

[0117] Step S604: cropping the positive mold data to obtain processed positive mold data of the target tooth.

[0118] Step S605: Merge the processed oral scan data and the processed positive mold data to obtain the mold result corresponding to the target tooth.

[0119] In the above-mentioned impression-taking method based on a single tooth tray, during the impression-taking process, the rounded corners, overflow holes and obtuse-angle connection design of the single tooth tray are used to ensure that the impression material evenly fills the tooth gaps and discharges excess material, avoids bubbles and edge distortion, and enables the acquired impression data to accurately reflect the tooth morphology, gingival margin and other details; secondly, by inverting the impression data, the concave area of ​​the tooth can be accurately restored to the convex structure of the positive mold, and through the reverse conversion of the geometric shape, the subtle deformation errors that may occur during the curing process of the impression material are eliminated, making the positive mold data closer to the true three-dimensional shape of the tooth; thirdly, through the complementary fusion of oral scan data and positive mold data, the oral scan data supplements the surface details of the positive mold, and the positive mold data corrects the soft tissue interference errors that may exist in the oral scan, thereby eliminating the limitations of a single data source, and ultimately making the impression-taking result have both geometric accuracy and surface feature integrity, which is conducive to improving the accuracy of impression-taking.

[0120] In an exemplary embodiment, to more clearly illustrate the single-tooth tray impression-taking method provided in the present application, the following describes the single-tooth tray impression-taking method using a specific embodiment. In one embodiment, the present application also provides a method for designing, manufacturing, and using a dental tray for taking a single-tooth impression. Specifically, the following is included:

[0121] 1. The design of single tooth tray, such as Figure 1 and Figure 2 As shown:

[0122] (1) The tray consists of a bottom wall and two side walls. Overflow holes are designed on the bottom and side walls to allow the impression material to overflow and increase the retention between the impression material and the tray.

[0123] (2) The bottom wall is square with rounded corners. The length a (buccally or labiolingually) is between 0.8 and 3.2 cm, the width b (mesiodistal) is between 0.6 and 1.5 cm, and the thickness g is between 0.5 and 4 mm. The bottom wall is designed with an overflow hole structure.

[0124] (3) The two side walls are basically symmetrical. The side walls are isosceles trapezoidal or square with rounded corners. The edge h close to the bottom wall is equal to the tray width b. The waist height d is between 0.5-1.5 cm. The edge e away from the bottom wall is between 0.5-1.8 cm. The side wall thickness i is between 0.5-4 mm. An overflow hole is designed.

[0125] (4) The connection between the side wall and the bottom wall is an obtuse angle. The distance c between the two side walls on the bottom wall is between 0.6-2.2 cm, and the value of ac is between 0.4-1.0 cm. That is, there is space at both ends of the bottom wall to serve as tray handles, which is convenient for users to hold, position and demould. The distance f between the two side walls away from the bottom wall is between 0.8-3.5 cm, and the value of fc is between 0.4-1.0 cm.

[0126] 2. Production of single tooth tray:

[0127] According to the single tooth tray design, digital technology is used to generate a digital tray model, and the single tooth tray is made through digital additive / subtractive technology. The tray materials can be aluminum, stainless steel, resin, or plastic.

[0128] 3. Use of single tooth tray:

[0129] (1) Initial disinfection: You can choose high temperature and high pressure method, immersion in disinfectant (such as 75% alcohol, iodine tincture) or ultraviolet irradiation method.

[0130] (2) Usage: For clinical impressions of 1-2 affected teeth, when making dental posts and cores, single crowns, inlays, veneers or partial crowns, an intraoral scanner can be used to obtain the upper and lower dentition and occlusal relationship, and then the tray of the present invention can be used to accurately make an impression of the affected tooth and scan the impression to obtain digital impression data. The patient's dentition data and single tooth impression scan data are imported into the exocad software, the impression scan data is flipped into positive mold data, the positive mold data is matched with the oral scan data, and the data is merged to compensate for the unclear problem of a single intraoral scan. It is especially suitable for post and core impressions or single crown restorations with a deep subgingival margin. The specific method of taking impressions with a single tooth tray is as follows:

[0131] Place the impression material on the single-tooth tray and around the affected tooth, fill the tray space with the impression material, and remove the impression material outside the tray space. Position the tray from the occlusal surface and place it on the affected tooth. After the impression material solidifies, take it out and use scissors to remove the impression material with irregular edges to obtain a single-tooth impression.

[0132] (3) Reuse method: Remove the impression material inside the tray, ultrasonically clean for 10 minutes, immerse in chlorine-containing disinfectant for 24 hours, rinse with tap water, blow dry, and disinfect by high temperature and high pressure method, immersion in disinfectant (such as 75% alcohol, iodine tincture) or ultraviolet irradiation method, and set aside.

[0133] In an exemplary embodiment, a single tooth tray printed using a resin material by additive manufacturing is provided, specifically as follows, Figure 3 and Figure 4 As shown:

[0134] (1) The tray consists of a bottom wall and two side walls. There are four overflow holes designed on the bottom and two overflow holes designed on the side walls. The overflow holes are 1.2 mm in diameter.

[0135] (2) The bottom wall is square with rounded corners, a length (buccally or labially) of 2.2 cm, a width (mesiodistal) of 1.2 cm, and a thickness (g) of 2 mm.

[0136] (3) The two side walls are basically symmetrical and square with rounded corners. The edge h close to the bottom wall is equal to the tray width of 1.2 mm, the waist height d is 0.7 cm, the edge e away from the bottom wall is 1.2 cm, and the side wall thickness i is 2 mm.

[0137] (4) The connection between the side wall and the bottom wall forms an obtuse angle. The distance c between the two side walls on the bottom wall is 1.6 cm, and the distance f between the two side walls away from the bottom wall is 2.1 cm.

[0138] (5) Print single tooth tray using resin material through additive manufacturing and disinfect with 75% alcohol.

[0139] (6) When placing the impression material, fill the tray with the impression material and remove the impression material that overflows from the side walls and top.

[0140] In an exemplary embodiment, a method for obtaining a post and core impression and data matching using a single dental tray is provided, specifically as follows:

[0141] (1) Using a single tooth tray to make a single tooth post and core impression:

[0142] For a single tooth after tooth preparation and root canal post preparation, dry the root canal, insert the silicone rubber light body into the root canal, use the screw conveyor to empty the air bubbles in the root canal, place the impression post, put the prepared silicone rubber weight body into the single tooth tray, remove the excess impression material, place the tray in place on the occlusal surface, and press the tray with one finger to fix the tray (such as Figure 7 ), after 5 minutes, remove the impression along the long axis of the tooth, trim the impression, and obtain the post and core impression (as shown in Figure 8 The silicone rubber impression was scanned with an intraoral scanner and the scanned data was exported in PLY format and named “Post and Core Impression-1” (as shown in the figure). Figure 9 shown).

[0143] (2) Intraoral dentition scan:

[0144] An intraoral scanner was used to scan the patient's upper and lower dentition and occlusal relationship, and the scanned data was exported in PLY format and named "Dentition-2".

[0145] (3) Matching the post and core impression with the oral scan data:

[0146] Open exocad software, create a new project, select the affected tooth, choose "Onlay" as the design type, and mark the opposing teeth. Import the "Post and Core Impression-1" data, right-click, and select "Edit Mesh"; right-click, select "Show Triangular Mesh Positioning"; right-click, select "Invert Triangular Mesh Positioning", and click "OK" to invert the post and core impression into a positive post and core mold (such as Figure 10 As shown), cut the post and core positive mold to the appropriate size (as shown Figure 11), import the "Dentition-2" data (as shown in Figure 12 ), right-click and select "Match Scan", select a reference point on the crown of the affected tooth to match "Post and Core Impression-1" and "Dentition-2" (as shown in the figure). Figure 13 As shown), click "OK", select "Merge all scan data", and complete the data matching and merging (as shown Figure 14 shown).

[0147] In an exemplary embodiment, a method for making a single crown restoration impression with a deep subgingival margin using a single tooth tray is provided, specifically as follows:

[0148] For single crown restoration teeth with deep subgingival margins, conventional intraoral scanning cannot obtain clear margins. Single tooth impressions are made using single tooth impression technology. Light silicone rubber is injected into the subgingival margin, and heavy silicone rubber is placed on the single tooth tray. The occlusal surface is placed (e.g. Figure 15 As shown), demoulding was carried out after 5 minutes to make a single tooth impression (as shown Figure 16 As shown in the figure), an intraoral scanner is used to obtain a digital single-tooth impression, and exocad software is used to flip the impression to generate a positive mold data (as shown in the figure). Figure 17 ), and oral scan data (such as Figure 18 ) to merge the data, delete the overlapping data of the oral scan data, and finally generate a dental impression with clear edges (as shown in Figure 19 as shown), which facilitates the subsequent design of the single crown edge.

[0149] like Figure 20 The following figure shows a comparison of post and core impressions made using a partial tray (left, middle) and a single-tooth tray (right). Advantages of a single-tooth tray: (1) Smaller in size, requiring less impression material, thus saving costs; (2) Easy to dislocate, and the dislocation direction is close to the long axis of the tooth, which is less likely to cause impression deformation; (3) Less foreign body sensation, less likely to cause nausea in patients.

[0150] In the above embodiment, during the process of taking impressions using the single tooth tray, the rounded corners of the bottom wall and the side walls are designed to avoid bubbles or tears in the impression material caused by stress concentration at traditional sharp corners during impression taking, thereby ensuring complete replication of the edge contour and reducing distortion of the model edge; secondly, the overflow hole is set to guide the discharge of excess impression material during the impression taking process, preventing material accumulation to form bubbles or excessive local pressure, so that the material can evenly fill the gaps between the tooth and surrounding tissues, ensuring the clarity of details in the impression; furthermore, the symmetrical isosceles trapezoidal or square side walls are connected with obtuse angles, so that the impression material is more evenly stressed during injection, reducing material flow deviations caused by structural asymmetry; moreover, the obtuse angle design can also adapt to the physiological morphology of the tooth neck, closely fit the gingival edge, avoid gaps during impression taking, thereby improving the fit between the model and the real tooth structure, and helping to improve the accuracy of impression taking. At the same time, the single-tooth tray has a more precise range of impression taking, and only the impression of the affected tooth is obtained, saving impression materials; the single-tooth tray is easy to dislocate, and the dislocation direction is close to the long axis of the tooth, which is not easy to cause impression deformation, especially the deformation of the post and core impression; the single-tooth tray is small in size, which reduces the patient's foreign body sensation and improves the comfort of impression taking.

[0151] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts of the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0152] Based on the same inventive concept, the present application also provides a single-tray-based impression-taking device for implementing the aforementioned single-tray-based impression-taking method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more of the following single-tray-based impression-taking device embodiments can be found in the above-mentioned limitations of the single-tray-based impression-taking method, and will not be further elaborated here.

[0153] In an exemplary embodiment, Figure 21 As shown, a single-tissue tray-based impression device is provided, comprising: a data acquisition module 2101, a data reversal module 2102, and a data merging module 2103, wherein:

[0154] The data acquisition module 2101 is used to obtain the impression data of the target tooth through the single tooth tray associated with the target tooth and the intraoral scanner, and to obtain the oral scan data of the target tooth through the intraoral scanner; the single tooth tray is a single tooth tray of a single tooth tray.

[0155] The data inversion module 2102 is used to perform inversion processing on the impression data to obtain the positive mold data of the target tooth.

[0156] The data merging module 2103 is used to merge the oral scan data and the positive mold data to obtain the mold-taking result corresponding to the target tooth.

[0157] In an exemplary embodiment, the mold-taking device based on a single tooth tray also includes a data conversion module, which is used to perform format conversion processing on the impression data and the oral scan data respectively to obtain the processed impression data and the processed oral scan data of the target tooth; the data format of the processed impression data is the same as the data format of the processed oral scan data; the data inversion module 2102 is also used to invert the processed impression data to obtain the positive mold data of the target tooth; the data merging module 2103 is also used to merge the processed oral scan data and the positive mold data to obtain the mold-taking result corresponding to the target tooth.

[0158] In an exemplary embodiment, the mold-taking device based on a single tooth tray also includes a data cropping module for cropping the positive mold data to obtain processed positive mold data of the target tooth; the data merging module 2103 is also used to merge the processed oral scan data and the processed positive mold data to obtain the mold-taking result corresponding to the target tooth.

[0159] Each module in the above-mentioned single-tray-based impression-taking device can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in hardware form, or can be stored in a computer device memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0160] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Figure 22As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store impression data, oral scan data, etc. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for taking an impression based on a single tooth tray is implemented.

[0161] Those skilled in the art will understand that Figure 22 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0162] In an exemplary embodiment, a computer device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0163] In an exemplary embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0164] In an exemplary embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0165] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), data processing logic devices based on quantum computing, and the like.

[0166] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0167] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A single tooth tray, comprising a bottom wall and two side walls, characterized in that: The bottom wall is a square with rounded corners, and is provided with at least one overflow hole; The side walls are symmetrical in structure, the side walls are isosceles trapezoids or squares with rounded corners, and the side walls are provided with at least one overflow hole; The connection angles between the side walls and the bottom wall are both obtuse angles.

2. The single tooth tray according to claim 1, characterized in that: The length of the bottom wall is between 0.8 cm and 3.2 cm, the width of the bottom wall is between 0.6 cm and 1.5 cm, and the thickness of the bottom wall is between 0.5 mm and 4 mm; the length of the edge of the side wall close to the bottom wall is equal to the width of the bottom wall, the length of the edge of the side wall away from the bottom wall is between 0.5 cm and 1.8 cm, the height of the side wall is between 0.5 cm and 1.5 cm, and the thickness of the side wall is between 0.5 mm and 4 mm; the distance between the side walls close to the bottom wall is between 0.6 cm and 2.2 cm, and the distance between the side walls away from the bottom wall is between 0.8 cm and 3.5 cm.

3. The single tooth tray according to claim 1 or 2, characterized in that: The length of the bottom wall is 2.2 cm, the width of the bottom wall is 1.2 cm, and the thickness of the bottom wall is 2 mm; the length of the side wall away from the bottom wall is 1.2 cm, the height of the side wall is 0.7 cm, the thickness of the side wall is 2 mm, the distance between the side walls close to the bottom wall is 1.6 cm, and the distance between the side walls away from the bottom wall is 2.1 cm.

4. The single tooth tray according to claim 3, characterized in that: The diameters of the overflow hole provided on the bottom wall and the overflow hole provided on the side wall are both 1.2 mm.

5. A method for taking an impression based on a single tooth tray, characterized in that: The method comprises: Acquiring impression data of the target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and acquiring oral scan data of the target tooth through the intraoral scanner; the single tooth tray is the single tooth tray according to any one of claims 1 to 4; Performing inversion processing on the impression data to obtain positive mold data of the target tooth; The oral scan data and the positive mold data are combined and processed to obtain the mold-taking result corresponding to the target tooth.

6. The method according to claim 5, characterized in that After obtaining the impression data of the target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and obtaining the oral scan data of the target tooth through the intraoral scanner, the method further includes: Performing format conversion processing on the impression data and the oral scan data respectively to obtain processed impression data and processed oral scan data of the target tooth; the data format of the processed impression data is the same as the data format of the processed oral scan data; The step of performing inversion processing on the impression data to obtain positive mold data of the target tooth includes: performing inversion processing on the processed impression data to obtain positive mold data of the target tooth; The combining of the oral scan data and the positive mold data to obtain the mold result corresponding to the target tooth includes: The processed oral scan data and the positive model data are combined to obtain the impression result corresponding to the target tooth.

7. The method according to claim 6, characterized in that Before merging the processed oral scan data and the positive model data to obtain the impression result corresponding to the target tooth, the method further includes: Performing cropping processing on the positive mold data to obtain processed positive mold data of the target tooth; The processing of merging the processed oral scan data and the positive model data to obtain the impression result corresponding to the target tooth includes: The processed oral scan data and the processed positive model data are combined to obtain the mold-taking result corresponding to the target tooth.

8. A mold taking device based on a single tooth tray, characterized in that: The device comprises: a data acquisition module, configured to acquire impression data of a target tooth through a single tooth tray associated with the target tooth and an intraoral scanner, and to acquire oral scan data of the target tooth through the intraoral scanner; the single tooth tray being the single tooth tray according to any one of claims 1 to 4; A data reversal module, configured to perform reversal processing on the impression data to obtain positive mold data of the target tooth; The data merging module is used to merge the oral scan data and the positive mold data to obtain the mold taking result corresponding to the target tooth.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 5 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 5 to 7 are implemented.

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