Dental jaw model, uncut shell and shell-shaped dental appliance

Abstract

The utility model discloses a dental model which comprises a dental part and a base part used for supporting the dental part, and cutting indication mark lines arranged at intervals are arranged at the positions, away from gaps between adjacent teeth, on the lip-cheek side surface and the lingual side surface of the base part. The cutting indication mark line is arranged below the preset cutting path in the gingival-jaw direction, a first preset distance is formed between the cutting indication mark line and the preset cutting path, and the first preset distance is the distance between any point on the cutting indication mark line and a corresponding point, corresponding to the point on the preset cutting path in the gingival-jaw direction, of the point; the difference value of the first preset distance corresponding to any two points on the cutting indication mark line is within a preset range. The utility model also discloses an uncut shell for manufacturing the shell-shaped tooth appliance, and the shell-shaped tooth appliance obtained by cutting based on the uncut shell. The cutting indication mark line provided by the utility model can assist in cutting during subsequent hot-pressing film cutting, so that the consistency of the cutting edge of the shell-shaped dental appliance is ensured.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of the production and manufacturing of shell-shaped tooth aligners, and in particular to a dental model, an uncut shell for making a shell-shaped tooth aligner, and a shell-shaped tooth aligner. Background Art

[0002] In the field of dental orthodontic technology, due to advantages such as aesthetics, convenience, and being conducive to cleaning, invisible tooth aligners based on polymer materials are becoming more and more popular. The invisible tooth aligner is usually an integral shell, which forms a cavity for accommodating multiple teeth, and the geometric shape of the cavity basically matches these teeth in the corresponding layout.

[0003] Currently, in the processing of invisible tooth aligners, processes such as dental model printing, membrane preparation, membrane pressing, tooth aligner cutting, and cleaning are usually required. Among them, the dental model is a three-dimensional model simulating the patient's dentition, which is crucial in the production and manufacturing of invisible tooth aligners. In the membrane pressing process, first, the dental model is placed on the carrier plate of the membrane pressing device, and secondly, the membrane sheet to be pressed is placed on the heater for preheating, and then the heated membrane sheet is covered on the carrier plate carrying the dental model, and hot pressing forming is completed through positive pressure or negative pressure to generate an invisible tooth aligner with the dental model attached, and then the invisible tooth aligner is obtained after cutting along the cutting path.

[0004] However, in the prior art, although cutting is performed along a predetermined cutting path in the cutting process, after manual or automated cutting and processing, the invisible tooth aligner will have edges that are too long or too short. This inconsistent edge length not only affects the aesthetics of the invisible tooth aligner, but also affects the orthodontic effect of the invisible tooth aligner. Specifically, the too-long edge will compress the patient's gums, the patient will feel uncomfortable, and their wearing compliance will decrease, resulting in the orthodontic effect not reaching the expectation; while the too-short edge will cause the cavity of the invisible tooth aligner to fail to completely wrap the patient's teeth, resulting in insufficient wrapping force and also unable to guarantee the expected orthodontic effect. Summary of the Utility Model

[0005] The purpose of the embodiments of the present application is to provide a dental model, an uncut shell for making a shell-shaped tooth aligner, and a shell-shaped tooth aligner. The cutting indication marking line on the dental model can assist in indicating cutting during cutting after subsequent hot pressing of the membrane, which helps to improve production efficiency and can ensure the consistency of the cutting edges of the shell-shaped tooth aligner, and helps to improve patient satisfaction.

[0006] To solve the above problems, the present application provides a dental cast, which includes a dental part and a base part for supporting the dental part. On the labial-buccal side and lingual side surfaces of the base part, at positions avoiding the adjacent tooth spaces, there are spaced-apart cutting indication marking lines. The cutting indication marking lines are arranged below a predetermined cutting path in the gingival-occlusal direction and are set at a first preset distance from the predetermined cutting path. The first preset distance is the distance between any point on the cutting indication marking line and the corresponding point on the predetermined cutting path corresponding to this point in the gingival-occlusal direction. Among them, the difference between the first preset distances corresponding to any two points on the cutting indication marking line is within a predetermined range.

[0007] Compared with the prior art, in the present application, by arranging the cutting indication marking lines below the predetermined cutting path in the gingival-occlusal direction, thus, when cutting the untrimmed shell formed by the thermoplastic membrane, a cutting indication guiding line that is concavo-convexly matched with the cutting indication marking lines can be formed on the untrimmed shell. The area corresponding between the cutting indication guiding line and the predetermined cutting path can be used by the staff to perform cutting within this area. Compared with a single predetermined cutting path, this area is more convenient for the staff in the cutting process to perform cutting operations, which can not only save processing time; but also facilitate the subsequent trimming of the edges of the shell-shaped tooth aligner obtained by cutting, and can also facilitate the inspection personnel to inspect whether the edges of the shell-shaped tooth aligner are too long or too short, further ensuring the consistency of the edges of the obtained shell-shaped tooth aligner, thereby improving the satisfaction and compliance of patients.

[0008] In some embodiments, the predetermined range is from 0 to 0.02 mm. Such a predetermined range can ensure that the trend of the cutting indication marking lines is basically consistent with the trend of the predetermined cutting path. Thus, when performing cutting processing along the predetermined cutting path, the edges of the shell-shaped tooth aligner are relatively consistent.

[0009] In some embodiments, the first preset distance range is 0.2 mm - 0.5 mm. Such a first preset distance range can assist in cutting while preventing the edges of the shell-shaped tooth aligner from being left too long, resulting in gingival compression and discomfort.

[0010] In some embodiments, the cutting indication marking lines are convex structures protruding from the labial-buccal side and lingual side of the base part and / or concave structures recessed in the labial-buccal side and lingual side of the base part.

[0011] In some embodiments, the cutting indication marking lines between two adjacent adjacent tooth spaces are a continuously arranged convex structure or concave structure. Such a continuously convex structure or concave structure can reduce the processing difficulty of the dental cast.

[0012] In some embodiments, the cutting indication marking line between two adjacent interdental spaces is a plurality of outwardly convex structures and / or inwardly concave structures arranged at intervals, and the adjacent outwardly convex structures, the inwardly concave structures, or between the outwardly convex structures and the inwardly concave structures are arranged at intervals with a second preset distance. Compared with continuous outwardly convex structures or inwardly concave structures, a plurality of outwardly convex structures or inwardly concave structures arranged at intervals are more conducive to saving processing materials during processing, such as photosensitive resin materials used for 3D printing.

[0013] In some embodiments, the range of the second preset distance is 0.2 mm - 0.5 mm.

[0014] In some embodiments, when the cutting indication marking line is an outwardly convex structure protruding from the labial-buccal side and the lingual side of the base portion, the outwardly convex structure is provided with a guiding surface for guiding demolding. Such a guiding surface arrangement is conducive to prying the film during the demolding process, so that the cut shell-shaped dental appliance is separated from the dental cast.

[0015] In some embodiments, the protruding height range of the outwardly convex structure is 0.3 mm - 0.5 mm.

[0016] To achieve the purpose of the present application, the present application also provides an uncut shell for manufacturing a shell-shaped dental appliance. The uncut shell is formed by thermocompression of a membrane on the above-mentioned dental cast. The uncut shell includes a shell-shaped dental appliance and a to-be-cut edge integrally formed with the shell-shaped dental appliance. Cutting indication guiding lines that are concavo-convexly matched with the cutting indication marking line are formed on the labial-buccal side and the lingual side side walls of the uncut shell, and are used to guide the cutting of the uncut shell to form the shell-shaped dental appliance.

[0017] To achieve the purpose of the present application, the present application also provides a shell-shaped dental appliance, and the shell-shaped dental appliance is a part of the above-mentioned uncut shell after cutting off the to-be-cut edge along the cutting indication guiding line. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same numerical reference signs are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a scale limitation.

[0019] Figure 1 It is a schematic structural diagram of a dental cast provided by some embodiments of the present application;

[0020] Figure 2 It is a schematic structural diagram of a dental cast provided by other embodiments of the present application;

[0021] Figure 3Schematic cross-sectional view of tooth B and its corresponding base portion along the A-A' direction;

[0022] Figures 4 to 6 Schematic diagram of a predetermined cutting path and a cutting indication marking line provided in some other embodiments of the present application;

[0023] Figures 7 to 9 Schematic cross-sectional view of the cutting indication marking line provided in some other embodiments of the present application from a certain perspective;

[0024] Figure 10 Schematic structural diagram of an untrimmed housing provided in the second embodiment of the present application;

[0025] Figure 11 Schematic structural diagram of a shell-shaped tooth aligner provided in the third embodiment of the present application. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will elaborate on each embodiment of the present invention in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are provided to help readers better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed by the present invention can still be implemented. The division of the following various embodiments is for convenience of description and should not constitute any limitation to the specific implementation manners of the present invention.

[0027] The directional terms such as "upper", "lower", "left", and "right" used in the description herein are all directions in the accompanying drawings and do not refer to special limitations. Unless otherwise clearly specified and limited, the term "connection" in this article should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated, and can be directly connected or indirectly connected through an intermediate medium.

[0028] The "posterior tooth area" mentioned in each embodiment of the present invention is defined according to the classification of teeth on pages 36-38 of the second edition of "Introduction to Stomatology" published by Peking University Medical Press, including premolars and molars, teeth numbered 4-8 in the FDI notation, and teeth numbered 1-3 in the FDI notation for the anterior tooth area. The teeth in the anterior tooth area include central incisors, lateral incisors, and canines.

[0029] As is known from the background art, in the existing solutions, after hot pressing a dental cast to form a thermoformed film, although the cutting process is carried out along a predetermined cutting path, during manual or automated cutting, the actual cutting path usually deviates from the predetermined cutting path due to the proficiency of the operator or the cutting accuracy of the automated equipment. This results in the edges of the invisible dental aligner being too long or too short, which not only affects the aesthetics of the invisible dental aligner but also its orthodontic effect.

[0030] Based on this, the applicant proposes a dental cast, which includes a dental part and a base part for supporting the dental part. Spaced cutting indication marking lines are provided at positions on the labial-buccal side and lingual side surfaces of the base part that avoid the interdental spaces. The cutting indication marking lines are arranged below the predetermined cutting path in the gingival-occlusal direction and are set at a first preset distance from the predetermined cutting path. The first preset distance is the distance between any point on the cutting indication marking line and the corresponding point on the predetermined cutting path corresponding to this point in the gingival-occlusal direction. Among them, the difference between the first preset distances corresponding to any two points on the cutting indication marking line is within a predetermined range.

[0031] In the dental cast designed by the inventor of the present application, by arranging the cutting indication marking lines below the predetermined cutting path in the gingival-occlusal direction, when cutting the untrimmed shell formed by hot pressing the film, a cutting indication guiding line that is concavo-convexly matched with the cutting indication marking lines can be formed on the untrimmed shell. The area corresponding between the cutting indication guiding line and the predetermined cutting path can be used by the staff to perform cutting operations within this area. Compared with a single predetermined cutting path, this area is more convenient for the staff in the cutting process to perform cutting operations, which can not only save processing time but also facilitate the later trimming of the edges of the shell-shaped dental aligner obtained by cutting. It can also facilitate the inspection personnel to inspect whether the edges of the shell-shaped dental aligner are too long or too short, further ensuring the consistency of the edges of the obtained shell-shaped dental aligner, thereby improving the patient's satisfaction and compliance.

[0032] Example 1

[0033] Please refer to Figures 1 to 6 As shown, the dental cast 100 of the present utility model includes a dental part 1 and a base part 2 for supporting the dental part 1. Among them, the dental part 1 corresponds to the tooth layout state of the patient at a certain stage during the treatment process, and the base part 2 can correspond to the patient's real gingival state, or a virtual gingival state simulated based on the scanned tooth layout, or a base with a certain height directly added below the gingival line of the dental part 1.

[0034] On the buccal and lingual surfaces of the base portion 2, spaced-apart cutting indication marking lines 4 are provided at positions avoiding the corresponding positions of the adjacent tooth spaces 3. The cutting indication marking lines 4 are arranged below the predetermined cutting path 5 in the gingival-occlusal direction and are arranged at a first preset distance H1 from the predetermined cutting path 5. Among them, in combination with Figure 2 and Figure 3 shown, taking the tooth B on the dental model 100 as an example for illustration, Figure 3 is Figure 2 a cross-sectional view of the tooth B in the A-A' direction in it. The first preset distance H1 is the distance between any point on the cutting indication marking line 4 and the corresponding point on the predetermined cutting path 5 corresponding to this point in the gingival-occlusal direction. The cutting indication marking line 4 of the present application is arranged to avoid the adjacent tooth spaces 3. On the one hand, there are concave triangular areas at the corresponding positions of the adjacent tooth spaces 3. If the cutting indication marking line 4 is arranged below the predetermined path, it will instead increase the difficulty of cutting and trimming the cutting tool between the predetermined cutting path and the cutting indication marking line, increase the cutting processing time, and even cannot ensure that cutting can be carried out between the predetermined cutting path and the cutting indication marking line every time; on the other hand, arranging the cutting indication marking line 4 to avoid the adjacent tooth spaces 3 can also save the amount of photosensitive resin material used for 3D printing.

[0035] In some embodiments, the first preset distance range H1 is 0.2 mm - 0.5 mm. Such a first preset distance range can assist cutting while preventing the edge of the shell-shaped tooth orthodontic appliance from being too long and pressing on the gums, causing discomfort to the patient.

[0036] Please further combine with Figure 4 shown. C and D are any two points on the cutting indication marking line 4 respectively, and their corresponding points on the predetermined cutting path 5 are C' and D' respectively. The first preset distances corresponding to the two points C and D are the distances of C-C' and D-D' in the gingival-occlusal direction respectively, which are represented by h1 and h2 respectively; please further combine with Figure 5 shown. E and F are any two points on the cutting indication marking line 4 respectively, and their corresponding points on the predetermined cutting path 5 are E' and F' respectively. The first preset distances corresponding to the two points E and F are the distances of E-E' and F-F' in the gingival-occlusal direction respectively, which are represented by h3 and h4 respectively; in the present application, the difference between h1 and h2 or the difference between h3 and h4 is within a predetermined range h. In some embodiments, the predetermined range h is 0 to 0.02 mm. Such a predetermined range h can ensure that the trend of the cutting indication marking line is basically the same as the trend of the predetermined cutting path. In this way, when cutting and processing along the predetermined cutting path, the edges of the shell-shaped tooth orthodontic appliance are relatively consistent.

[0037] Further explanation: In some embodiments, the predetermined cutting path 5 may substantially conform to the gingival line of the dental arch model 100. For example, the predetermined cutting path 5 may be located on the crown side of the gingival line of the dental arch model 100 and very close to the gingival line; it may also be located on the gingiva side of the gingival line and very close to the gingival line; it may also be partially located on the crown side of the gingival line of the dental arch model 100 and partially located on the gingiva side of the gingival line, and very close to the gingival line.

[0038] It should be noted that the above-mentioned dental arch model 100 may refer to the upper dental arch or the lower dental arch of the patient. The above-mentioned dental arch model 100 may be the initial dental arch layout state before the patient undergoes treatment, may also be the intermediate dental arch layout state after a certain stage of treatment, or may also be the final dental arch layout after the final treatment.

[0039] In some embodiments, please continue to refer to Figure 1 As shown, the cutting indication marking line 4 is a convex structure protruding from the labial-buccal side and the lingual side of the base portion 2. In other embodiments, the cutting indication marking line 4 is a concave structure concave from the labial-buccal side and the lingual side of the base portion 2. In other embodiments, the cutting indication marking line 4 may be partially a convex structure protruding from the labial-buccal side and the lingual side of the base portion 2 and partially a concave structure concave from the labial-buccal side and the lingual side of the base portion 2. Based on the background technology, the current thermoforming process is one of the main production methods for invisible dental aligners. In the thermoforming process, first, the dental arch model is placed on the carrier plate of the thermoforming device, then the membrane sheet to be thermoformed is placed on the heater for preheating, and then the heated membrane sheet is covered on the carrier plate carrying the dental arch model, and thermoforming is completed through positive pressure or negative pressure to generate an invisible dental aligner with the dental arch model attached, that is, an uncut shell, and then it is cut along the cutting path to obtain the invisible dental aligner. Therefore, in the present application, the cutting indication marking line 4 is designed as a convex structure and / or a concave structure, which is beneficial to form a cutting indication guiding line that is concave-convexly matched with the cutting indication marking line 4 at the corresponding position of the uncut shell, facilitating the identification of the staff in the subsequent cutting process to assist in completing the cutting process of the shell-shaped dental aligner.

[0040] In some embodiments, as Figure 4 shown, the cutting indication marking line 4 between two adjacent interdental spaces is a plurality of spaced convex structures and / or concave structures, wherein the adjacent convex structures, the adjacent concave structures, or between the convex structure and the concave structure are spaced at a second preset distance H2. In some embodiments, the range of the second preset distance H2 is 0.2 mm - 0.5 mm. Such a spaced arrangement can save the processing material of the dental arch model 100, such as the photosensitive resin material for 3D printing.

[0041] In some other embodiments, as Figure 5 shown, the cutting indication marking line 4 between two adjacent interdental spaces is a continuously arranged convex structure or concave structure. Such a continuous structure can reduce the processing difficulty of the dental model 100.

[0042] In some other embodiments, as Figure 6 shown, the cutting indication marking lines 4 between two adjacent interdental spaces can be respectively a continuously arranged convex structure or concave structure and a convex and / or concave structure arranged at intervals. It can be flexibly designed and processed according to processing needs.

[0043] In some embodiments, please refer to Figures 7 to 9 shown. When the cutting indication marking line 4 is a convex structure protruding from the labial-buccal side and lingual side of the base portion, the protruding height H3 of the convex structure ranges from 0.3 mm to 0.5 mm. Wherein, the protruding height H3 of the convex structure is the protruding height value at the position with the maximum protruding height on the convex structure. Through the test verification of the inventors of the present application, such a height design can not only form a relatively clear cutting indication guiding line at the corresponding position on the uncut shell obtained by thermocompression film for indicating and assisting cutting, but also does not increase the difficulty of prying the film due to the arrangement of a plurality of convex structures.

[0044] In some embodiments, please continue to refer to Figures 7 to 9 shown. When the cutting indication marking line 4 is a convex structure protruding from the labial-buccal side and lingual side of the base portion, the convex structure is provided with a guiding surface for guiding demolding. Such a guiding surface is beneficial for prying the film in the demolding process to guide the cut shell-shaped tooth orthodontic appliance to separate from the dental model 100. In the demolding process, generally, a prying mechanism is used to insert from one end near the gingival line on the lingual side or labial-buccal side of the uncut shell formed by thermocompression film and apply a prying force to make the uncut shell separate from the dental model 100 along the prying direction X. Wherein, the guiding surface is arranged at the insertion end of the convex structure adjacent to the prying mechanism, and the cross-sectional dimension of one end of the guiding surface near the insertion end of the prying mechanism is smaller than the cross-sectional dimension of one end of the guiding surface far from the insertion end of the prying mechanism. In some embodiments, the guiding surface can be an arc surface as Figure 7 and Figure 9 shown, or can also be an inclined plane as Figure 8 shown, and the overall cross-section is a right trapezoid.

[0045] Example 2

[0046] To solve the technical problems to be solved by the present utility model, please refer to Figure 10As shown, the present application also provides an untrimmed housing 200 for manufacturing a shell-shaped tooth aligner. The untrimmed housing 200 includes a shell-shaped tooth aligner 10 and a to-be-trimmed edge 20 integrally formed with the shell-shaped tooth aligner 10. Among them, the untrimmed housing 200 is formed by thermocompression with a diaphragm covering the dental cast 100 of Embodiment 1. Moreover, on the labial-buccal side and lingual side sidewalls of the untrimmed housing 200, more precisely, on the labial-buccal side and lingual side sidewalls of the to-be-trimmed edge 20 and at a position adjacent to the gingival line with the gingival-jaw upward, a cutting indication guiding line 6 is formed for guiding the cutting of the untrimmed housing 200 to form the shell-shaped tooth aligner 10. Among them, the cutting indication guiding line 6 has a contour shape that is concavo-convexly matched with the cutting indication marking line 4.

[0047] Example 3

[0048] To achieve the technical problems to be solved by the present utility model, please refer to Figure 11 As shown, the present application also provides a shell-shaped tooth aligner 10, which is a part obtained by cutting the untrimmed housing 200 in Embodiment 2 under the auxiliary guidance of the cutting indication guiding line 6, removing the to-be-trimmed edge, and then performing edge trimming. In this way, a shell-shaped tooth aligner 10 with a relatively high edge consistency is obtained.

[0049] It should be noted that, without contradiction, the above embodiments can be freely combined as needed to form different new implementation schemes. The implementation schemes formed by such combinations are all within the protection scope of the present application. To save the space of the application text, they will not be elaborated here.

[0050] The above is only the preferred implementation mode of the present application. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as within the protection scope of the present application.

[0051] Similarly, the above is only the specific implementation mode of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art in this technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, and all should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A dental model, comprising a dental part and a base for supporting the dental part, characterized in that: Cutting indicator marking lines are arranged at intervals on the labial and buccal and lingual surfaces of the base part at positions avoiding the gaps between adjacent teeth. The cutting indicator marking lines are arranged below the predetermined cutting path in the gingival and maxillofacial direction and at a first preset distance from the predetermined cutting path. The first preset distance is the distance between any point on the cutting indicator marking line and the corresponding point on the predetermined cutting path in the gingival and maxillofacial direction corresponding to the point, wherein the difference between the first preset distances corresponding to any two points on the cutting indicator marking line is within a predetermined range.

2. The dental model according to claim 1, characterized in that: The predetermined range is 0 to 0.02 mm.

3. The dental model according to claim 1 or 2, characterized in that: The first preset distance ranges from 0.2 mm to 0.5 mm.

4. The dental model according to claim 1, characterized in that: The cutting indication marking line is an outward convex structure protruding from the labial and buccal sides and the lingual sides of the base portion and / or an inward concave structure concave from the labial and buccal sides and the lingual sides of the base portion.

5. The dental model according to claim 4, characterized in that: The cutting indication mark line between two adjacent tooth gaps is a continuously arranged outer convex structure or inner concave structure.

6. The dental model according to claim 4, characterized in that: The cutting indication marking line between two adjacent adjacent tooth gaps is a plurality of spaced-apart convex structures and / or concave structures, and the adjacent convex structures, the concave structures, or the convex structures and the concave structures are spaced at a second preset distance.

7. The dental model according to claim 6, characterized in that: The second preset distance ranges from 0.2 mm to 0.5 mm.

8. The dental model according to claim 4, characterized in that: When the cutting indication marking line is an outwardly convex structure protruding from the labial and buccal sides and the lingual side of the base portion, the outwardly convex structure is provided with a guiding surface for guiding demoulding.

9. The dental model according to claim 8, characterized in that: The protruding height of the outer protruding structure ranges from 0.3mm to 0.5mm.

10. An uncut shell for making a shell-shaped dental appliance, characterized in that: The uncut shell is formed by hot pressing a membrane on the dental model as described in claims 1 to 9, and the uncut shell includes a shell-shaped dental appliance and an edge to be cut that is integrally formed with the shell-shaped dental appliance. Cutting indication guide lines that match the cutting indication marking lines are formed on the labial and buccal and lingual side walls of the uncut shell, and are used to guide the cutting of the uncut shell to form the shell-shaped dental appliance.

11. A shell-shaped dental appliance, characterized in that: The shell-shaped dental appliance is the portion of the uncut shell according to claim 10 after the edge to be cut is removed along the cutting indication guide line.

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