Dental jaw model

Abstract

The utility model discloses a dental model, which is used as a mold for forming a hot-pressing film to manufacture a shell-shaped dental appliance, and comprises a dental model body, and repositioning jaw elements extending towards the opposite jaw direction are respectively arranged in rear tooth areas on two sides of the dental model body; the repositioning jaw element comprises a fixing part made of a first material and a main body part made of a second material, wherein the fixing part and the main body part are arranged in a split manner, and the main body part is detachably connected with the fixing part; the fixing part is fixedly connected with the surface of one side of the dental model body, and a first connecting part is arranged on one side, facing the main body part, of the fixing part; and the main body part is provided with a second connecting part which is matched with the first connecting part and is detachably mounted along the buccal tongue direction.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the orthodontic technical field, more exactly, relate to dental instrument manufacturing technology, especially, relate to a dental model. BACKGROUND

[0002] In the orthodontic technical field, due to the advantages such as appearance, convenience and cleaning, the invisible tooth appliance based on high polymer material is more and more popular. The invisible tooth appliance is usually an integral shell, which forms a cavity accommodating a plurality of teeth, and the geometry of the cavity substantially matches these teeth under the corresponding layout. At present, in the automatic processing of the invisible tooth appliance, a hot pressing film process is usually adopted, in which the film is heated, and after heating, it is covered on the dental model, a pressure maintaining structure is covered, and inflation and pressurization are completed to finish the hot pressing film.

[0003] At present, in the invisible tooth appliance field, it is usually necessary to add accessories such as jaw pad opening bite, locking structure stabilizing upper and lower jaws in a predetermined position on the invisible tooth appliance; through the hot pressing film process, the designed dental model is first 3D printed, and the corresponding accessory model is designed at the corresponding position of the dental model; then the heated film is covered on the dental model, cutting and demolding are carried out, and the appliance after demolding has a cavity containing the shape of the above-mentioned accessory model. In clinical practice, the structure stability of these accessories and the demolding requirement are often considered, and the head part (i.e. the part with the acting end) of the accessory is usually designed to be smaller than the tail part (i.e. the part with the fixed end). However, such design has the following problems: when the acting end of the head part acts on the opposite jaw, the acting end is easily deformed or torn due to small stress area, resulting in poor stability, thereby causing the appliance to fail to achieve the expected treatment effect. At present, some orthodontic manufacturers process the cavity with the accessory model shape into a solid accessory, for example, fill the cavity with a filler, so that the mechanical strength of the accessory cavity is enhanced, but the filler filling the accessory cavity must be made of medical material that can be accessed, on the one hand, the production cost of the orthodontic manufacturer is increased, on the other hand, the overall weight of the appliance is increased, and the transportation cost is also increased. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem of overcoming the defects in the prior art, and provides a dental model, based on which a shell-shaped dental appliance that can meet the mechanical strength of the appliance accessory cavity and reduce the manufacturing and transportation cost of the appliance can be produced and manufactured.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A dental model used as a mold for thermoforming a shell-shaped dental appliance, comprising a dental model body, a repositioning jaw element extending towards the opposite jaw on each side of the posterior teeth area of the dental model body; the repositioning jaw element comprises a fixed part made of a first material and a main part made of a second material, the main part is detachably connected with the fixed part; the fixed part is fixedly connected with one side surface of the dental model body, the fixed part is provided with a first connecting part on the side facing the main part; the main part is provided with a second connecting part matching the first connecting part and detachably mounted in the buccal-lingual direction.

[0007] Preferably, the second material is a special model resin for the mouth.

[0008] Preferably, the fixed part is a boss structure protruding from the part of the buccal side or the lingual side or the occlusal surface of the dental model body in the direction away from the dental model body, and the first connecting part is arranged at one end of the boss structure facing the opposite jaw.

[0009] Preferably, the first connecting part comprises a protruding structure arranged in the buccal-lingual direction, and the second connecting part comprises a mounting channel arranged in the buccal-lingual direction corresponding to the protruding structure, the mounting channel and the protruding structure are relatively slidable in the buccal-lingual direction to separate the main part from the fixed part.

[0010] Preferably, the protruding structure comprises a first limiting part, and the mounting channel comprises a second limiting part matched with the first limiting part, after mounting, the first limiting part and the second limiting part cooperate to limit the movement of the main part in the gingival direction.

[0011] Preferably, the mesial surface and the distal surface of the protruding structure are arranged obliquely, and the width of the protruding structure in the mesial-distal direction gradually increases from one end adjacent to the fixed part to the other end away from the fixed part, wherein the mesial surface and the distal surface of the protruding structure form the first limiting part, and the inner side wall of the mounting channel matched with the mesial surface and the distal surface of the protruding structure form the second limiting part.

[0012] Preferably, the protruding structure is provided with a guide inclined surface at the end away from the fixed part and adjacent to the lingual side, for guiding the separation of the shell-shaped dental appliance and the dental model in the separation direction.

[0013] Preferably, the fixed part further comprises a third limiting part on the side adjacent to the dental model body, the third limiting part is located on the side of the protruding structure adjacent to the dental model body, for limiting the continuous movement of the mounting channel and the protruding structure in the direction of the dental model body after mounting.

[0014] Preferably, the third limiting portion has a height dimension in the gingival direction that is less than or equal to a height dimension of the protruding structure in the gingival direction, and the protruding structure has a height dimension in the gingival direction of 1mm-2mm.

[0015] Preferably, a retention portion is provided on the buccal side and / or the lingual side of the main body portion.

[0016] Preferably, the retention portion has a depth dimension of 0.4mm-0.8mm.

[0017] Compared with the prior art, the technical scheme has at least one of the following beneficial effects:

[0018] (1) The dental arch model has the following advantages: first, after the dental arch model is hot-pressed to form a shell-shaped dental appliance, the shell-shaped dental appliance forms a receiving cavity that wraps the main body portion; when the shell-shaped dental appliance is removed from the dental arch model, the dental arch model body and the fixing portion are separated from the shell-shaped dental appliance, and the main body portion can be left in the receiving cavity and fixed by the receiving cavity, thereby enhancing the mechanical strength of the receiving cavity; second, the main body portion can enhance the mechanical strength of the proximal end of the receiving cavity, thereby avoiding deformation or tearing of the proximal end of the receiving cavity when it is pressed by the opposite jaw; at the same time, the main body portion has a small volume and weight, and only needs to fill the proximal end of the receiving cavity, thereby reducing the production and transportation costs; third, the main body portion and the fixing portion are designed to be detachably assembled and separated in the buccal-lingual direction, and the direction of demolding separation is consistent, which is more conducive to demolding.

[0019] (2) The fixing portion and the main body portion are made of first and second materials, respectively; for the main body portion that needs to be inserted into the mouth, the second material must be a special model resin for the mouth; for the fixing portion, a common 3D printing photosensitive resin can be used to reduce the printing cost, which meets the medical standard requirements of the main body portion and reduces the printing cost of the overall dental arch model.

[0020] (3) The utility model discloses further set up the first limit portion on the convex structure, correspondingly, set up the second limit portion with the first limit portion cooperation on the installation channel, after the installation cooperation of installation channel and convex structure, through the cooperation of first limit portion and second limit portion, the main part is limited in gum jaw and moves upwards, to guarantee the installation of main part and fixed part in gum jaw and upwards in the process of pressing film can be relatively stable, does not occur relative movement, further guarantee the hot pressing film effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] One or more embodiments are illustrated by way of example in the figures of the accompanying drawings that form a part of this specification. These example embodiments are not, however, to be taken as limiting in scope, as the scope is defined by the claims. Like reference numerals indicate like elements in the drawings, unless otherwise specified. The drawings in which:

[0022] Figure 1 is a structural schematic diagram of a dental arch model in the embodiment one of the application;

[0023] Figure 2 is an assembly schematic diagram of a repositioning arch element in the embodiment one of the application;

[0024] Figure 3 is a side view of another repositioning arch element in the embodiment one of the application;

[0025] Figure 4 is a structural schematic diagram of another dental arch model in the embodiment one of the application;

[0026] Figure 5 is a structural schematic diagram of still another dental arch model in the embodiment one of the application;

[0027] Figure 6 is a side view of a repositioning arch element with a third limit portion in the embodiment one of the application;

[0028] Figure 7 is a side view of a repositioning arch element with another third limit portion in the embodiment one of the application;

[0029] Figure 8 is a side view of a fixed portion with a guide slope in the embodiment one of the application;

[0030] Figure 9 is a side view of a fixed portion with another guide slope in the embodiment one of the application;

[0031] Figure 10 is a structural schematic diagram of a shell-shaped dental appliance in the embodiment two of the application;

[0032] Figure 11 is a flowchart of a manufacturing method of a shell-shaped dental appliance in the embodiment two of the application. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the various embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the various embodiments of the present application, many technical details are proposed in order to make the readers better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed by the present application can be implemented. The division of the following various embodiments is for the convenience of description, and should not constitute any limitation on the specific implementation of the present application.

[0034] The directional terms such as "up", "down", "left", "right" and the like used in the description herein are the directions in the drawings, and do not refer to special limitations. Unless otherwise explicitly specified and limited, the term "connection" in the present application should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral, it can be directly connected, or indirectly connected through an intermediate medium.

[0035] The "posterior tooth area" mentioned in the various embodiments of the present application is defined according to the classification of teeth in the "Introduction to Oral Medicine" published by Peking University Medical Publishing House, 2nd edition, pages 36-38, including premolars and molars, which are displayed as teeth 4-8 in FDI marking method, and the teeth in anterior tooth area are displayed as teeth 1-3 in FDI marking method. The teeth in anterior tooth area include central incisors, lateral incisors and canines.

[0036] As known from the background art, at present, in the field of invisible tooth correction, it is usually necessary to add jaw pads for opening bite, locking structures for stabilizing upper and lower jaws in predetermined positions and other accessories on invisible tooth correctors; in clinical practice, the structural stability of these accessories and the need for demolding are often considered, and the head part (i.e. the part with the acting end) of these accessories is usually designed to be smaller in size than the tail part (i.e. the part with the fixed end); however, when the acting end of the head part acts against the opposite jaw, the acting end will be easily extruded and deformed or torn due to small force area, resulting in poor stability and thus the inability of the corrector to achieve the expected treatment effect. Although some orthodontic manufacturers currently fill the cavities with fillers to enhance the mechanical strength of the accessory cavities, they will have to bear higher production and transportation costs.

[0037] Based on this, the applicant proposes a dental model used as a mold for making a shell-shaped dental appliance by hot pressing film forming. When the film is hot pressed on the dental model of the application and demolded and cut, a shell-shaped dental appliance can be formed which can not only strengthen the mechanical strength of the accessory cavity, but also reduce the production and transportation costs. Among them, the dental model includes a dental model body, and the posterior tooth area on both sides of the dental model body is provided with a repositioning jaw element extending in the direction of the opposite jaw; the repositioning jaw element includes a fixed part made of a first material and a main part made of a second material which are separately arranged, and the main part and the fixed part are detachably connected; the fixed part is fixedly connected with one side surface of the dental model body, and the side of the fixed part facing the main part is provided with a first connecting part; the main part is provided with a second connecting part matched with the first connecting part and detachably mounted along the buccal and lingual direction. Through such a structure design, on the one hand, after the shell-shaped dental appliance is hot pressed on the dental model, the shell-shaped dental appliance forms a containing cavity wrapping the main part; when the shell-shaped dental appliance is removed from the dental model, the dental model body and the fixed part are separated from the shell-shaped dental appliance, and the main part can be left in the containing cavity after being separated from the fixed part and is fixed by the containing cavity, so as to strengthen the mechanical strength of the containing cavity; on the other hand, the main part can strengthen the mechanical strength of the near-opposite-jaw end of the repositioning jaw element, so as to avoid its deformation or tearing when acting with the opposite jaw, at the same time, the main part has small volume and weight, and only needs to fill the near-opposite-jaw end of the repositioning jaw element, so as to reduce the production and transportation costs to a certain extent.

[0038] The specific description will be made below in combination with the drawings.

[0039] Example 1

[0040] Please refer to Figure 1 and Figure 2The dental arch model 100 is used as a mold for hot-pressing film forming to manufacture a shell-shaped tooth appliance, and the film can be covered on the dental arch model 100 to form the shell-shaped tooth appliance through hot-pressing film. The dental arch model 100 comprises a dental arch model body 10, and a repositioning jaw element 20 extending towards the opposite jaw direction is arranged on both sides of the posterior tooth area of the dental arch model body 10. The repositioning jaw element 20 comprises a fixed part 21 made of a first material and a main body part 22 made of a second material, and the main body part 22 is detachably connected with the fixed part 21. The fixed part 21 is fixedly connected with one side surface of the dental arch model body 10, and the fixed part 21 is provided with a first connecting part 23 on one side facing the main body part 22. The main body part 21 is provided with a second connecting part 24 matched with the first connecting part 23 and detachably mounted along the buccal-lingual direction. Specifically, in the clinic, the main body part 22 can be mounted and detached along the buccal-lingual direction. When the main body part 22 is mounted, the main body part 22 gradually approaches the dental arch model body 10 from the side away from the dental arch model body 10 along the buccal-lingual direction, so that the first connecting part 23 and the second connecting part 24 are matched in the buccal-lingual direction, thereby completing the mounting. Conversely, when the main body part 22 is detached, the main body part 22 gradually separates from the dental arch model body 10 from the side close to the dental arch model body 10 along the buccal-lingual direction, thereby completing the detachment.

[0041] Further, in the hot-pressing film process, the dental arch model 100 is used as a mold for manufacturing a shell-shaped tooth appliance, and a dental film is hot-pressed on the dental arch model 100 to manufacture a shell-shaped tooth appliance. The shell-shaped tooth appliance is provided with a containing cavity wrapping the repositioning jaw element 20. In the clinic, based on the detachable feature of the main body part 22 and the fixed part 21, the main body part 22 can be retained in the containing cavity when demolding, and finally worn in the oral cavity of the patient, so as to strengthen the mechanical strength of the containing cavity (especially the end of the containing cavity facing the opposite jaw). Based on this, the second material needs to be a special model resin for oral cavity, for example, the SP_RB0808 model or the SP_RB0803 model of the model resin produced by Zhejiang Xunshi Technology Co., Ltd. Such resin meets the medical oral entry standard, but its cost is higher than that of ordinary 3D printing photosensitive resin. In the present application, the material of the main body part 22 needs to meet the medical oral entry standard, so the second material has a higher limitation. The first material used to manufacture the fixed part 21 can be ordinary 3D printing photosensitive resin.

[0042] In the present embodiment, the repositioning jaw element 20 is a locking structure arranged on the buccal side of the posterior dental region of the dental arch model body 10 and extending towards the opposite jaw. The locking structure is provided with a locking portion on the side close to the opposite jaw. In clinical practice, a dental arch model provided with the repositioning jaw element 20 is used to make a shell-shaped dental appliance. The shell-shaped dental appliance is provided with a receiving cavity for accommodating the repositioning jaw element. The locking portion in the receiving cavity can cooperate with the locking portion of the opposite jaw to stabilize and lock the upper and lower jaws at a predetermined position. For example, the upper and lower jaws can be guided to a predetermined position to open the airway of the patient to inhibit snoring. Alternatively, the upper and lower jaws can be guided forward to improve and treat the malocclusion of "sky covering the earth".

[0043] Of course, in other embodiments, the repositioning jaw element 20 can also be a jaw pad structure arranged on the occlusal surface of the posterior dental region of the dental arch model body 10 and extending towards the opposite jaw to open the bite, as shown in Figure 4 Alternatively, the repositioning jaw element 20 can be other structures arranged on the lingual surface of the posterior dental region of the dental arch model body 10 and extending towards the opposite jaw, as shown in Figure 5 The present application does not limit the arrangement position and structure of the repositioning jaw element 20.

[0044] Further description can be made by referring to Figure 2 The fixing portion 21 is fixedly connected to the buccal surface of the dental arch model body 10. The fixing portion 21 is formed by the buccal surface of the dental arch model body 10 protruding away from the dental arch model body 10 to form a boss structure 25. The first connecting portion 23 is arranged on the end of the boss structure 25 close to the opposite jaw.

[0045] Further, the first connecting portion 23 includes a protruding structure arranged along the buccal-lingual direction. The second connecting portion 24 is a structure formed on the position corresponding to the first connecting portion 23 and capable of matching the first connecting portion 23 in shape and size, for example, a set of concave-convex structures capable of matching each other. The second connecting portion 24 is an installation channel arranged along the buccal-lingual direction and corresponding to the protruding structure. The installation channel and the protruding structure are capable of sliding relative to each other along the buccal-lingual direction. Further description can be made as follows. The height of the protruding structure in the gingival direction can be 1 mm-2 mm. If the height is too small, the stability of the cooperation between the first connecting portion 23 and the second connecting portion 24 is low. If the height is too high, the inner contour of the second connecting portion 24 is also high, which reduces the mechanical strength of the main body 22. When the shell-shaped dental appliance is formed and accommodated in the shell-shaped dental appliance, the mechanical strength requirement cannot be met. For example, in a specific embodiment, the height can be 1.5 mm.

[0046] In the embodiment, the convex structure is an inverted trapezoidal body, which is an inverted trapezoid from the buccal side; the side surfaces of the inverted trapezoidal body near the front teeth and the back teeth form two guide bevels (S1, S2), respectively, which are connected with the side surface S of the inverted trapezoidal body and the boss structure 25, respectively, and the included angles α are obtuse angles. It can be understood that the convex structure can also be a cube, a cuboid, a triangular pyramid, a cylinder and the like, and the inner contour shape of the mounting channel matches the same. The present application will not be listed one by one.

[0047] Further description, the fixed part 21 and the main part 22 of the dental model 100 are limited in the mesial-distal direction due to the limitation of the convex structure, the movement of the mounting channel in the mesial-distal direction can be limited, which can ensure that the first connecting part 23 and the second connecting part 24 do not move relative to each other in the mesial-distal direction during the pressing process. In the utility model, the applicant wants to make the first connecting part 23 and the second connecting part 24 relatively stable and not move relative to each other in the gingival direction during the pressing process, so as to further ensure the stability and pressing effect during hot pressing. The convex structure of the utility model further comprises a first limiting part 232, and correspondingly, the mounting channel further comprises a second limiting part 242 matched with the first limiting part 232. After installation, the first limiting part 232 and the second limiting part 242 cooperate to limit the movement of the main part 22 in the gingival direction. Specifically, in the embodiment, the mesial surface and the distal surface of the convex structure are inclined, and the cross section of the convex structure as a whole is an inverted trapezoid from the buccal side of the dental model 100, that is, the width dimension of the convex structure in the mesial-distal direction gradually increases from the end near the fixed part 21 to the end away from the fixed part 21. At this time, the mesial surface and the distal surface of the convex structure form the first limiting part 232, and correspondingly, the inner side wall of the mounting channel matched with the mesial surface and the distal surface of the convex structure forms the second limiting part 242; when the main part 22 moves towards the opposite jaw from the gingival direction, the mesial surface and the distal surface of the convex structure are limited by the inner side wall of the mounting channel, thereby limiting the movement of the main part 22 towards the opposite jaw.

[0048] Of course, it can be understood that the structure and arrangement of the first limiting part and the second limiting part can also be more, as long as the implementation mode of limiting the movement of the main part 22 in the gingival direction can be realized, which is not limited by the present application. For example, as shown in FIG. 8, the first limiting part 232 and the second limiting part 242 can be arranged on the side surface S of the convex structure and the inner side wall of the mounting channel, respectively. Figure 3As shown, the first limiting portion 232 and the second limiting portion 242 can also be: at the corresponding positions of the convex structure and the installation channel, one or more sets of concave-convex matching concave-convex structures are arranged, when the installation channel is installed on the convex structure from the buccal-lingual direction, the concave-convex structures are concave-convex matched, the movement of the main body portion 22 in the gingival-jaw direction away from the convex structure 25 will be limited, and the structural stability of the dental model 100 can also be ensured.

[0049] Further explanation, please refer to Figure 6 to Figure 8 As shown, when the installation channel is installed on the fixed portion 21 from the buccal-lingual direction away from the dental model body 20 to the dental model body 20, in order to enable the installation channel to be installed at a predetermined position in the buccal-lingual direction, the fixed portion 21 of the present application can also be provided with a third limiting portion 30 on the side close to the dental model body 20, the height dimension h of the third limiting portion 30 in the gingival-jaw direction is less than or equal to the height dimension of the convex structure in the gingival-jaw direction, and the third limiting portion 30 abuts against the circumferential contour of the installation channel in the buccal-lingual direction to limit the installation channel from continuing to move in the direction close to the dental model body 20 after being installed on the convex structure. If no limiting is performed at this position, it may, due to the operation error of the installer, especially when the repositioning jaw element 20 is arranged on the buccal surface or lingual surface of the dental model body 20, cause the gap between the main body portion 22 and the dental arch model at the corresponding position of the dental model body after installation to be extremely small, and the shell-shaped tooth aligner formed after the heat pressing film process will not be easy to demold. If the repositioning jaw element 20 is arranged on the occlusal surface of the dental model body 20, no limiting in the buccal-lingual direction may cause the position of the main body portion 22 in the buccal-lingual direction to deviate, which will also affect the treatment effect of the shell-shaped tooth aligner after pressing.

[0050] Specifically, the shape of the third limiting portion 30 can be a columnar structure extending in the opposite direction perpendicular to the surface of the convex structure, or can be a blocking piece arranged in the buccal-lingual direction to block the installation channel structure from continuing to move in the direction close to the dental model body 20.

[0051] Further explanation, the part of the main body portion 22 cooperating with the third limiting portion 30 can be as Figure 6 As shown, a matching structure matching the shape and size of the third limiting portion 30 is arranged on the main body portion 22, when the third limiting portion 30 contacts the matching structure, the third limiting portion 30 and the matching structure cooperate with each other (for example, concave-convex cooperation) to block the movement of the main body portion 22 or the installation channel from continuing to move in the direction close to the dental model body 20. It can also be asFigure 7 As shown, the part of the main body 22 in contact with the third limiting part 30 (i.e. the circumferential profile of the mounting channel) does not need to be matched in design, the side of the main body 22 close to the dental model body 20 directly abuts on the side surface of the third limiting part 30 close to the side of the main body 22, which can also block the movement of the main body 22 or the mounting channel to continue moving towards the side close to the dental model body 20.

[0052] Generally, in the demolding process, the shell-shaped dental appliance formed by hot pressing is pried from the lingual side and turned in the direction from the lingual side to the buccal side to make the shell-shaped dental appliance separate from the dental model 100. In some embodiments of the present application, in order to facilitate demolding, a guide slope 233 is arranged on the end of the protruding structure away from the fixed part and adjacent to the lingual side, please refer to Figure 9 As shown, the guide slope 233 can be an arc surface with a certain curvature, so that the corresponding accommodation cavity of the guide slope is relatively smooth after demolding, and the comfort of the patient wearing in the oral cavity is guaranteed; of course, it can also be a plane inclined from the lingual side to the buccal side; both can be used to guide the separation of the protruding structure and the mounting channel in the separation direction of the shell-shaped dental appliance. It can be understood that when the fixed part 21 is provided with the third limiting part 30, the guide slope 233 can also be arranged on the surface of the third limiting part 30 close to the lingual side (please refer to Figure 8 again).

[0053] In some embodiments, please refer to Figure 2 As shown, a retaining part 221 can also be arranged on the buccal side or lingual side of the main body 22 in concave or convex manner; or the buccal side and lingual side of the main body 22 are both arranged with retaining parts in concave or convex manner; part of the dental film will protrude or recess at this position during hot pressing, which can enhance the retaining force between the main body 22 and the shell-shaped dental appliance after hot pressing, prevent falling off, and thus guarantee that the main body 22 can be accommodated and fixed in the cavity of the corresponding position of the shell-shaped dental appliance after demolding.

[0054] Specifically, in the design, considering the effective retention and convenient demolding, the depth dimension of the retaining part 21 (i.e. the dimension of buccal-lingual concave or convex) can be designed as 0.4mm-0.8mm; the inventors have verified through experiments that when the depth dimension of the retaining part 21 is less than 0.4mm, the retaining force is not strong; when it is greater than 0.8mm, the part of the dental film protruding or recessing is not easy to separate from the dental model body 20 in the demolding process, causing demolding difficulty.

[0055] Example 2

[0056] To achieve the object of the present application, the present application also provides a manufacturing method of the shell-shaped dental appliance, referring to Figure 11 as shown, comprising the following steps:

[0057] S101: obtaining a dental arch model, wherein the dental arch model is the dental arch model described in Embodiment 1. It is further explained that the dental arch model can be an entity dental arch model obtained by 3D printing based on a digital dental arch model.

[0058] For example, the data information of the digital dental arch model can be obtained by intraoral scanning, or the data information of the digital dental arch model can be obtained by impression, and then the obtained data information is obtained by three-dimensional reconstruction to obtain the digital dental arch model.

[0059] According to the treatment target, the tooth model of the digital dental arch model is rotated, translated, and designed to add a repositioning jaw element, the digital dental arch model is moved from the initial position to the treatment target position, the tooth arrangement process is completed, and a series of digital dental arch models gradually moving from the initial position to the treatment target position are designed.

[0060] Finally, the digital dental arch model is 3D printed by 3D printing to obtain an entity dental arch model.

[0061] It should be noted that the dental arch model in the present application can be any dental arch model with a repositioning jaw element during the treatment process.

[0062] S102: hot pressing film forming, hot pressing film on the dental arch model to form a to-be-cut shell-shaped dental appliance, the to-be-cut shell-shaped dental appliance has a accommodating cavity wrapping the repositioning jaw element.

[0063] Through the hot pressing film forming process, the dental film for preparing the shell-shaped dental appliance is pressed on the dental arch model to form a to-be-cut shell-shaped dental appliance containing the shape of the teeth and the repositioning jaw element, that is, the to-be-cut shell-shaped dental appliance has a accommodating cavity wrapping the repositioning jaw element. The technology of preparing the shell-shaped dental appliance by hot pressing film forming process is relatively mature, which is not described here.

[0064] S103: cutting, cutting the to-be-cut shell-shaped dental appliance along a predetermined cutting path to form a shell-shaped dental appliance.

[0065] The shell-shaped dental appliance to be cut formed by the hot-pressing film process is pressed on the dental model, and thus needs to be cut by cutting technology, for example, manual cutting or automatic cutting by cutting equipment (laser cutting or mechanical cutting) to obtain the shell-shaped dental appliance. In the present embodiment, the cutting method is not limited.

[0066] S104: demolding, removing the shell-shaped dental appliance from the dental model, the dental model body and the fixing part are separated from the shell-shaped dental appliance together, the first connecting part and the second connecting part slide and separate along the buccal-lingual direction, and the main part is left and fixed in the accommodating cavity to form the shell-shaped dental appliance.

[0067] The shell-shaped dental appliance to be cut formed by the hot-pressing film process is pressed on the dental model, and thus needs to be cut by cutting technology, for example, manual cutting or automatic cutting by cutting equipment (laser cutting or mechanical cutting) to obtain the shell-shaped dental appliance. In the present embodiment, the cutting method is not limited.

[0068] It should be noted that the cutting and demolding of the shell-shaped dental appliance can be manually operated or automatically operated by automatic equipment, and the difference lies in the operation sequence of cutting and demolding. Specifically, in manual operation, the hot-pressed shell-shaped dental appliance to be cut is first roughly cut, then manually demolded, and finally finely cut. In automatic operation, the shell-shaped dental appliance to be cut is first cut by cutting equipment along the predetermined cutting path, and then the shell-shaped dental appliance is separated from the dental model by demolding equipment to obtain the shell-shaped dental appliance. The manufacturing method of the shell-shaped dental appliance of the present application is suitable for manual and automatic operation, that is, the steps S103 and S104 in the above steps are not limited to performing the step S103 first and then performing the step S104, and the order of the steps can be adjusted according to the specific operation.

[0069] Please refer to Figure 10As shown, the shell-shaped dental appliance 200 obtained by the manufacturing method comprises a shell-shaped dental appliance 40, the two side posterior dental areas of the shell-shaped dental appliance 40 comprise repositioning jaw element accommodating cavities corresponding to the repositioning jaw elements, and the accommodating cavities are wrapped with the main body 22 retained therein, so that the mechanical strength of the repositioning jaw element accommodating cavities near the end of the shell-shaped dental appliance 200 for use can be strengthened, and the repositioning jaw element accommodating cavities are not easy to be extruded, deformed or torn, so as to guarantee the realization of the expected treatment effect.

[0070] It should be noted that the above embodiments can be freely combined as needed to form different new embodiments without causing contradictions, and such combined embodiments are within the protection scope of the present application, and will not be repeated here to save the length of the application text.

[0071] The above is only the preferred embodiment of the present application, and it should be pointed out that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application.

[0072] Similarly, the above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which 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 used as a mold for thermoforming a shell-shaped dental appliance, comprising a dental model body, characterized in that, two posterior tooth regions of the dental model body are respectively provided with a repositioning jaw element extending towards the opposite jaw; the repositioning jaw element comprises a fixed part made of a first material and a main part made of a second material, which are detachably connected; the fixed part is fixedly connected to one side surface of the dental model body, and the fixed part is provided with a first connecting part on one side facing the main part; the main part is provided with a second connecting part matching the first connecting part and detachably mounted along the buccal-lingual direction. The second material is a special model resin for the mouth. The fixed part is a boss structure protruding from the part of the buccal side or the lingual side or the occlusal surface of the dental model body in a direction away from the dental model body, and the first connecting part is arranged at one end of the boss structure facing the opposite jaw.

2. The dental model according to claim 1, characterized in that The first connecting part comprises a protruding structure arranged along the buccal-lingual direction, and the second connecting part comprises a mounting channel arranged along the buccal-lingual direction and corresponding to the protruding structure, and the mounting channel and the protruding structure are relatively slidable along the buccal-lingual direction to separate the main part from the fixed part.

3. The dental model according to claim 1, characterized in that The protruding structure comprises a first limiting part, and the mounting channel comprises a second limiting part matched with the first limiting part, and after mounting, the first limiting part and the second limiting part cooperate to limit the movement of the main part in the gingival direction.

4. The dental model according to claim 1, characterized in that The mesial surface and the distal surface of the protruding structure are arranged obliquely, and the width of the protruding structure in the mesial-distal direction gradually increases from one end adjacent to the fixed part to the other end away from the fixed part, wherein the mesial surface and the distal surface of the protruding structure form the first limiting part, and the inner side wall of the mounting channel matched with the mesial surface and the distal surface of the protruding structure forms the second limiting part.

5. The dental model according to claim 4, characterized in that The protruding structure is provided with a guide slope at one end away from the fixed part and adjacent to the lingual side, which is used to guide the separation of the shell-shaped dental appliance and the dental model in the separation direction.

6. The dental model according to claim 5, characterized in that The fixed part near the dental model body further comprises a third limiting part, which is located on the side of the protruding structure near the dental model body, and is used to limit the continuous movement of the mounting channel and the protruding structure in the direction of the dental model body after mounting.

7. The dental model according to claim 4, characterized in that The height of the third limiting part in the gingival direction is less than or equal to the height of the protruding structure in the gingival direction, and the height of the protruding structure in the gingival direction is 1-2 mm.

8. The dental model according to claim 4, characterized in that The buccal side and / or the lingual side of the main part is provided with a retaining part in concave or convex shape.

9. The dental model according to claim 8, characterized in that The depth of the concave or convex retaining part is 0.4-0.8 mm.

10. The dental model according to claim 1, characterized in that ​ 11. The dental model according to claim 10, characterized in that ​

Images