Shell-shaped dental instrument

Abstract

The utility model discloses a shell-shaped dental instrument which comprises a shell-shaped body and a repositioning jaw element, the repositioning jaw element is arranged on the occlusal surface of a rear tooth area of the shell-shaped body in a protruding mode towards the jaw aligning direction and reconstructs the occlusal position of an upper jaw and a lower jaw, and the repositioning jaw element is a hollow cavity integrally formed with the shell-shaped body. The hollow cavity comprises an occlusal part in contact with the jaw during wearing and a supporting part for supporting the occlusal part, a reinforcing block for improving the deformation resistance of the occlusal part in the gingival-jaw direction is arranged in the occlusal part, the outer contour shape of the reinforcing block is matched with the inner contour shape of the occlusal part, the reinforcing block is fixedly connected with the occlusal part, and the supporting part is fixedly connected with the occlusal part. The top face of the reinforcing block is attached to the inner surface of the meshing face of the meshing part. A first reinforcing part is arranged on the cheek side face of the supporting part, the first reinforcing part is formed by inwards concaving or outwards protruding the cheek side face of the supporting part, a second reinforcing part is arranged on the tongue side face of the supporting part, and the second reinforcing part is formed by inwards concaving or outwards protruding the tongue side face of the supporting part.

Description

Technical Field

[0001] This utility model belongs to the field of dental orthodontics technology, and more specifically relates to a shell-shaped dental instrument. Background Technology

[0002] In the field of orthodontic technology, invisible aligners based on polymer materials are becoming increasingly popular due to their aesthetic appeal, convenience, and ease of cleaning. With the continuous improvement of invisible aligner technology, functional invisible aligners have also emerged, such as the advent of the invisible single-plate aligner or the invisible TwinBlock aligner. The invisible single-plate aligner, through its designed raised structure in the posterior teeth region, can open the bite while simultaneously leveling the SPEE curve and treating mild cases of mandibular retrusion; the invisible TwinBlock aligner guides mandibular protrusion through the mesial and distal slopes of the two raised occlusal pads during occlusion; and the reverse invisible TwinBlock aligner guides mandibular retrusion through the mesial and distal slopes of the two raised occlusal pads during occlusion.

[0003] Currently, most existing clear occlusal splints and clear twinBlock appliances are molded using a pressure molding process. The occlusal pads are mostly hollow structures, primarily located in the posterior teeth region. Due to the significant forces they experience, the occlusal pads can deform after repeated biting due to insufficient rigidity or support, thus failing to achieve the desired treatment effect. Existing technologies address this problem by placing filler blocks within the hollow structure of the occlusal pad. However, since these filler blocks need to be inserted into the mouth along with the shell-shaped dental instruments, the materials used for these filler blocks are of high quality, resulting in very high filling costs.

[0004] Therefore, it is particularly important to design a shell-shaped dental instrument that can effectively improve resistance to deformation to ensure stable occlusal position of the upper and lower jaws, while also reducing costs. Utility Model Content

[0005] The technical problem solved by this invention is to overcome the defects of the existing technology and provide a shell-shaped dental instrument that can effectively improve the resistance to deformation to ensure a stable occlusal position of the upper and lower jaws and reduce costs.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A shell-shaped dental instrument includes a shell-shaped body for accommodating a patient's tooth cavity. The shell-shaped body has a repositioning occlusal element protruding from its occlusal surface in the posterior tooth region towards the opposing jaw, reconstructing the occlusal position of the upper and lower jaws. The repositioning occlusal element is a hollow cavity integrally formed with the shell-shaped body. The hollow cavity includes an occlusal portion that contacts the opposing jaw during wear and a support portion that supports the occlusal portion.

[0008] The occlusal portion is provided with a reinforcing block to improve its resistance to deformation in the gingival direction. The outer contour shape of the reinforcing block matches the inner contour shape of the occlusal portion. The reinforcing block is fixedly connected to the occlusal portion, and the top surface of the reinforcing block is in contact with the inner surface of the occlusal surface of the occlusal portion.

[0009] The buccal side of the support has several first reinforcing parts that improve the resistance to deformation of the support in the gingival-maxillary direction. The first reinforcing parts are formed by the buccal side of the support inward or outward. The lingual side of the support has several second reinforcing parts that improve the resistance to deformation of the support in the gingival-maxillary direction. The second reinforcing parts are formed by the lingual side of the support inward or outward.

[0010] Preferably, the inner wall of the occlusal portion is provided with a retention portion, and the outer wall of the reinforcing block is provided with a mating portion that cooperates with the retention portion. The retention portion and the mating portion cooperate to restrict the movement of the reinforcing block in the gingival-occlusal direction.

[0011] Preferably, the retaining portion is a recessed portion formed by one or more sides of the occlusal portion that are recessed inward or protruding outward.

[0012] Preferably, the reinforcing block is fixedly connected to the interlocking part by adhesive bonding or laser welding.

[0013] Preferably, the outer surface of the occlusal surface of the occlusal portion has a structure that matches the concave and convex features of the outer surface of the occlusal surface at the corresponding position of the opposing jaw.

[0014] Preferably, the height dimension of the occlusal portion in the gingival direction is 1 / 3 to 1 times the height dimension of the support portion in the gingival direction.

[0015] Preferably, the reinforcing block is a prefabricated structure made of intraoral special modeling resin.

[0016] Preferably, the first reinforcing part is formed by a groove recessed inward from the buccal side of the support part or a ridge protruding outward from the buccal side of the support part, and the second reinforcing part is formed by a groove recessed inward from the lingual side of the support part or a ridge protruding outward from the lingual side of the support part, the groove or the ridge extending along the gingival direction; the first reinforcing part and the second reinforcing part extend from one end of the support part near the occlusal part to one end of the support part near the shell-like body along the gingival direction, so as to improve the deformation resistance of the support part in the gingival direction.

[0017] Preferably, the first reinforcing portion extends from the end of the support portion near the occlusal portion along the gingival direction to the occlusal surface of the occlusal portion to form a first reinforcing portion extension, and the second reinforcing portion extends from the end of the support portion near the occlusal portion along the gingival direction to the occlusal surface of the occlusal portion to form a second reinforcing portion extension, so as to improve the overall deformation resistance of the repositioning occlusal element in the gingival direction.

[0018] Preferably, the first reinforcing part is formed by a plurality of spaced recesses inwardly from the cheek side of the supporting part or a plurality of spaced protrusions outwardly from the cheek side of the supporting part, and the second reinforcing part is formed by a plurality of spaced recesses inwardly from the tongue side of the supporting part or a plurality of spaced protrusions outwardly from the tongue side of the supporting part.

[0019] Preferably, a number of spaced-apart recesses are distributed along the same straight line in the gingival-maxillary direction, or a number of spaced-apart protrusions are distributed along the same straight line in the gingival-maxillary direction.

[0020] Preferably, the reinforcing block has a first matching part at the position corresponding to the extension of the first reinforcing part, and / or the reinforcing block has a second matching part at the position corresponding to the extension of the second reinforcing part.

[0021] Preferably, the spacing between the plurality of first reinforcing portions in the mesiodistal direction is equal, and / or the spacing between the plurality of second reinforcing portions in the mesiodistal direction is equal.

[0022] Preferably, at least two adjacent first reinforcing portions and second reinforcing portions are staggered in the near-far direction.

[0023] Compared with the prior art, the present invention, by adopting the above technical solution, has at least one of the following beneficial effects:

[0024] (1) The shell-shaped dental instrument provided by this utility model has a repositioning jaw element that is integrally formed with the shell-shaped body into a hollow cavity, which is easy to manufacture. The hollow cavity includes an occlusal part and a support part. By setting a reinforcing block inside the occlusal part, the deformation resistance of the occlusal part in the gingival-maxillary direction (i.e., the occlusal direction of the upper and lower jaws) is improved. By designing the outer contour shape of the reinforcing block to match the inner contour shape of the occlusal part, the two can be tightly fitted. By designing the top surface of the reinforcing block to fit against the inner surface of the occlusal surface of the occlusal part, the mechanical strength of the occlusal part is further improved. Furthermore, by setting a number of first and second reinforcing parts on the buccal and lingual sides of the support part, the deformation resistance of the support part in the gingival-maxillary direction can be improved. This invention, by setting a reinforcing block inside the interlocking part and setting a first reinforcing part and a second reinforcing part on the supporting part, can enhance the mechanical strength of the entire hollow cavity, thereby ensuring the stability of the entire hollow cavity. On the other hand, compared with the existing technology of completely filling the filling block, since the reinforcing block needs to be made of resin material that can be inserted into the mouth, the reinforcing block of this invention saves the use of such resin raw materials, which greatly reduces the production cost.

[0025] (2) This utility model provides a retention part on the inner wall of the occlusal part and a matching part on the outer wall of the reinforcing block to cooperate with the retention part. By cooperating with the matching part, the movement of the reinforcing block in the gingival-maxillary direction is restricted, the anti-deformation ability of the occlusal part is enhanced, thereby further improving the stability of the occlusal part and ensuring the realization of the expected treatment effect.

[0026] (3) This utility model designs the outer surface of the occlusal surface of the occlusal part to match the concave and convex structure of the outer surface of the occlusal surface of the opposing jaw at the corresponding position. This design not only improves the occlusal effect, but also increases the comfort and stability of wearing shell-shaped dental instruments. Attached Figure Description

[0027] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same numerical reference numerals are denoted as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0028] Figure 1 This is a schematic diagram of the shell-shaped dental instrument in an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A cross-sectional schematic diagram of the repositioning jaw element at point A-A';

[0030] Figure 3 This is a cross-sectional schematic diagram of the support portion in an embodiment of the present invention;

[0031] Figure 4 This is a cross-sectional schematic diagram of another support portion in an embodiment of the present utility model;

[0032] Figure 5 This is a schematic diagram of another repositioning jaw element in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of another repositioning jaw element in this utility model embodiment;

[0034] Figure 7 for Figure 6 A schematic diagram of the cross-section of the central occlusal portion at B-B';

[0035] Figure 8 This is a cross-sectional schematic diagram of the interlocking portion with a retaining portion in an embodiment of the present invention;

[0036] Figure 9 This is a cross-sectional schematic diagram of an embodiment of the present invention where the interlocking part is provided with another type of retaining part;

[0037] Figure 10 This is a cross-sectional schematic diagram of the bearing portion in an embodiment of the present invention, in which a bearing reinforcement block is provided inside the interlocking portion. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of the invention. However, the technical solutions claimed by this utility model can be implemented even without these technical details and with various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of this utility model.

[0039] The directional terms "up," "down," "left," and "right" used in this document refer to the directions shown in the accompanying drawings and do not imply any specific limitation. Unless otherwise explicitly stated or limited, the term "connection" in this document should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part of a structure. It can refer to a direct connection or an indirect connection through an intermediate medium.

[0040] The term "posterior tooth region" mentioned in the various embodiments of this utility model is defined according to the classification of teeth in the 2nd edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38. It includes premolars and molars, teeth marked as 4-8 using the FDI notation, and teeth marked as 1-3 using the FDI notation for the anterior tooth region. The teeth in the anterior tooth region include the central incisors, lateral incisors, and canines.

[0041] As the background technology shows, most existing clear occlusal appliances, whether single-plate or Twin-Block, are formed using thermoforming. The occlusal pads are mostly hollow structures, primarily located in the posterior teeth region. Due to the significant forces they experience, the pads can deform after repeated biting due to insufficient rigidity or support, thus failing to achieve the desired treatment effect. Current technology addresses this problem by placing a filler block within the hollow structure of the occlusal pad. However, since this filler block needs to be inserted into the mouth along with the shell-shaped dental instrument, the material requirements for its fabrication are high, resulting in very high filling costs.

[0042] Based on this, the applicant proposes a shell-shaped dental instrument, including a shell-shaped body for accommodating a patient's tooth cavity. The shell-shaped body has a repositioning jaw element that reconstructs the occlusal position of the upper and lower jaws on the occlusal surface of the posterior tooth region, which protrudes towards the opposing jaw. The repositioning jaw element is a hollow cavity integrally formed with the shell-shaped body, which is easy to manufacture. The hollow cavity includes an occlusal portion that contacts the opposing jaw when worn and a support portion that supports the occlusal portion. The occlusal portion is internally provided with a reinforcing block to enhance its resistance to deformation in the gingival-maxillary direction. The outer contour shape of the reinforcing block matches the inner contour shape of the occlusal portion. The reinforcing block is fixedly connected to the occlusal portion, and its top surface is in contact with the inner surface of the occlusal surface of the occlusal portion. The buccal side of the support portion has several first reinforcing portions that enhance its resistance to deformation in the gingival-maxillary direction. These first reinforcing portions are formed by the buccal side of the support portion being concave inward or convex outward. The lingual side of the support portion has several second reinforcing portions that enhance its resistance to deformation in the gingival-maxillary direction. These second reinforcing portions are also formed by the lingual side of the support portion being concave inward or convex outward. By providing a reinforcing block internally to the occlusal portion, its resistance to deformation in the gingival-maxillary direction (i.e., the occlusal direction of the upper and lower jaws) is enhanced. By designing the outer contour shape of the reinforcing block to match the inner contour shape of the occlusal portion, a tight fit between the two is ensured. By designing the top surface of the reinforcing block to be in contact with the inner surface of the occlusal surface of the occlusal portion, the mechanical strength of the occlusal portion is further improved. Furthermore, by providing several first and second reinforcing parts on the buccal and lingual sides of the support, the design of the first and second reinforcing parts can improve the resistance to deformation of the support in the gingival-occlusal direction. This invention, by providing a reinforcing block within the occlusal region and first and second reinforcing parts on the support, enhances the mechanical strength of the entire hollow cavity, thereby ensuring its stability. Moreover, compared to the existing technology of completely filling with a filler block, which requires the use of oral resin material for the reinforcing block, the reinforcing block in this invention saves on the use of such resin raw materials, significantly reducing production costs.

[0043] The following will provide a detailed explanation with reference to the illustrations.

[0044] Please refer to Figure 1 and Figure 2As shown. The shell-shaped dental instrument 100 provided by this utility model includes a shell-shaped body 10 for accommodating a patient's tooth cavity. The shell-shaped body 10 has a repositioning occlusal element 20 protruding from the occlusal surface of the posterior tooth region towards the opposing jaw, which is used to reconstruct the occlusal position of the upper and lower jaws. The repositioning occlusal element 20 is a hollow cavity integrally formed with the shell-shaped body 10. In one embodiment, the repositioning occlusal element 20 can be manufactured by a thermoforming process, that is, by adding a repositioning occlusal element model to a dental model, and then covering the dental model with a dental film and pressing it to obtain the film. Typically, the outer contour dimension of the occlusal portion is smaller than or equal to the outer contour dimension of the support portion, so that the support portion provides more stable and reliable support. The hollow cavity includes an occlusal portion 21 and a support portion 22. The occlusal portion 21 is the part that contacts the opposing jaw when worn, and the support portion 22 is the part that supports the occlusal portion 21. At the connection position, the support portion 22 and the shell-shaped body 10 are directly connected, and the occlusal portion 21 is connected to the support portion 22. It should be noted that in the illustration, the boundary line between the occlusal portion 21 and the support portion 22 is indicated by a dashed line to illustrate their separation. In this application, a reinforcing block 30 is provided inside the occlusal portion 21, and the reinforcing block 30 is fixedly connected to the occlusal portion 21. The outer contour shape of the reinforcing block 30 is designed to match the inner contour shape of the occlusal portion 21, thus ensuring that the two (reinforcing block 30 and occlusal portion 21) can fit tightly together; at least the top surface S1 of the reinforcing block 30 fits against the inner surface of the occlusal surface S2 of the occlusal portion 21. During biting, the reinforcing block 30 can improve the resistance to deformation of the occlusal portion 21 in the gingival-maxillary direction (i.e., the occlusal direction of the upper and lower jaws). In addition, in this embodiment, the buccal side S3 of the support portion 22 has several features that enhance the resistance of the support portion 22 in the gingival-maxillary direction. A first reinforcing portion 221 with resistance to deformation in the gingival direction is formed by the buccal side surface S3 of the support portion 22 being recessed inward or protruding outward. A second reinforcing portion 222 is also provided on the lingual side surface S4 of the support portion 22, which is also recessed inward or protruding outward. In another embodiment, only the lingual side surface of the support portion 22 has a plurality of second reinforcing portions 222 that improve the resistance to deformation of the support portion 22 in the gingival direction. The second reinforcing portions 222 are formed by the lingual side surface of the support portion 22 being recessed inward or protruding outward. In yet another embodiment, only the buccal side surface S3 of the support portion 22 has the first reinforcing portion 221.This structural design, on the one hand, by setting a reinforcing block 30 inside the occlusal portion 21 and setting a first reinforcing part 221 and / or a second reinforcing part 222 on the support portion 22, can improve the deformation resistance of the repositioning jaw element 20 (hollow cavity) in the gingival-maxillary direction, thereby ensuring the stability of the entire repositioning jaw element 20 (hollow cavity); on the other hand, compared with the prior art's completely filled filling block solution, this application only needs to set the reinforcing block 30 inside the occlusal portion 21, without setting a large-volume reinforcing block in the entire hollow cavity. Since the material for making the reinforcing block 30 needs to use an oral resin material, for example, it can be made of intraoral special model resin of model SP_RB0808 or model SP_RB0803 produced by Zhejiang Xunshi Technology Co., Ltd. This type of resin meets the medical oral standard, but its cost is higher than that of ordinary 3D printing photosensitive resin. Therefore, the reinforcing block 30 in this application can save the use of such expensive intraoral special model resin raw materials compared with the prior art's completely filled solution, greatly reducing the production cost.

[0045] Specifically, in production, based on the needs of case design, the prefabricated structure of the reinforcing block 30 can be made in advance using the above-mentioned intraoral special model resin. After the shell-shaped dental instrument 100 with the repositioning jaw element 20 is completed, the prefabricated structure is installed in the occlusal part 21.

[0046] For further explanation, please refer to [link / reference]. Figure 1 As shown, the outer surface of the occlusal surface S2 of the occlusal portion 21 has a structure that matches the concavity and convexity of the outer surface of the occlusal surface of the opposing dentition at the corresponding position. Specifically, if the opposing dentition is wearing a shell-shaped dental instrument 100, the outer surface of the occlusal surface S2 of the occlusal portion 21 can be designed to match the concavity and convexity of the outer surface of the shell-shaped dental instrument 100 at the corresponding position; if the opposing dentition is not wearing a shell-shaped dental instrument 100, the outer surface of the occlusal surface S2 of the occlusal portion 21 can be designed to match the concavity and convexity of the occlusal surface of the posterior teeth at the corresponding position. This design not only improves the occlusal effect during maxillary and mandibular occlusion but also increases the comfort and stability of the shell-shaped dental instrument 100 after wearing it.

[0047] For further explanation, please refer to [link / reference]. Figure 2As shown in the diagram, in this application, the height h1 of the occlusal portion 21 in the gingival-maxillary direction is 1 / 3 to 1 times the height h2 of the support portion 22 in the gingival-maxillary direction. As explained above, the reinforcing block 30, which fills the occlusal portion 21, is made from a material that is more expensive than ordinary 3D-printed photosensitive resin. Therefore, to ensure the overall deformation resistance of the repositioning jaw element 20, a smaller volume of the reinforcing block 30 can save on production costs. Thus, through the inventors' experiments, when the height h1 of the occlusal portion 21 in the gingival-maxillary direction is designed to be 1 / 3 to 1 times the height h2 of the support portion 22 in the gingival-maxillary direction, the reinforcing block 30 can both meet the overall deformation resistance requirements of the repositioning jaw element 20 and control the production cost of the reinforcing block 30. Furthermore, this proportional design ensures the strength of the occlusal portion 21 while avoiding discomfort to the patient caused by an excessively high repositioning jaw element 20.

[0048] For further explanation, please refer to [link / reference]. Figure 2 and combined Figure 3 and Figure 4 As shown, where, Figure 3 and Figure 4 This is a schematic diagram of the cross-sectional structure of the support portion 22. Figure 3 In the illustrated embodiment, the first reinforcing part 221 is a ridge formed by protruding outward from the buccal side S3 of the supporting part 22, and the second reinforcing part 222 is a ridge formed by protruding outward from the lingual side of the supporting part 22, and both ridges extend along the gingival-maxillary direction. In this embodiment, three ridges are provided on the buccal side S3 of the supporting part 22. It can be understood that the number of ridges can be one or other, as long as it meets the deformation resistance requirement of the supporting part 22. The first reinforcing part 221 and the second reinforcing part 222 extend from one end of the supporting part 22 near the occlusal part 21 to one end of the supporting part 22 near the shell-like body along the gingival-maxillary direction. Since the middle position of the supporting part is usually subjected to greater force during maxillary and mandibular occlusion and is prone to collapse or other forms of deformation, the ridge structure needs to be provided at least in the middle position of the supporting part in the mesiodistal direction. This continuous ridge structure design not only improves the deformation resistance of the support 22, but also gives the entire repositioning jaw element 20 better overall deformation resistance in the gingival direction. Furthermore, in these three ridges, the distance L between adjacent ridges in the mesiodistal direction is equal; further combined with... Figure 3 A cross-sectional schematic diagram shows that the tongue-shaped side of the support portion 22 is simultaneously provided with three convex ridges. This design simultaneously enhances the deformation resistance of both the cheek-shaped and tongue-shaped sides of the support portion 22, thus improving the overall deformation resistance of the support portion 22. Further explanation: In Figure 2In one embodiment, the ridges are arranged in parallel. In another embodiment, the ridges are arranged in a cross pattern, both of which can improve the deformation resistance of the support 22.

[0049] exist Figure 4 In the illustrated implementation, with Figure 3 The illustrated implementation differs in that the first reinforcing part 221 is recessed inward from the cheek side surface S3 of the support part 22 to form a groove, and the second reinforcing part 222 is recessed inward from the tongue side surface of the support part 22 to form a groove. Furthermore, at least two adjacent first reinforcing parts 221 and second reinforcing parts 222 are staggered in the mesiodistal direction. For example, Figure 4 In the design, the groove has a symmetrical structure. Among the two adjacent first reinforcing parts 221 and second reinforcing parts 222 on the mesial side, the positions of the axis of symmetry P of the first reinforcing part 221 and the axis of symmetry P' of the second reinforcing part 222 are staggered. Especially when both the first reinforcing part 221 and the second reinforcing part 222 are grooves, if the first reinforcing part 221 and the second reinforcing part 222 are aligned, that is, the positions of the first reinforcing part 221 and the second reinforcing part 222 are symmetrical, the inventors found that the buccal-lingual width of the support part 22 at the positions where the grooves are provided on the buccal and lingual sides is much smaller than the buccal-lingual width at the positions where the grooves are not provided. This will cause stress concentration to occur more easily in the areas with larger buccal-lingual width on the occlusal surface of the support part 22, making the support part 22 used to support the occlusal part 21 more prone to deformation in these areas during the biting process of the repositioning jaw element 20. In this embodiment, the grooves on the buccal and lingual sides are staggered to avoid the buccal and lingual widths being too small. This arrangement can improve the overall anti-deformation ability of the support 22 when supporting the occlusal part 21 and ensure the stability of the shell-shaped dental instrument 100 during use.

[0050] In another embodiment, please refer to Figure 5 As shown, the first reinforcing part 221 may also be formed by a plurality of spaced recesses recessed inward from the cheek side surface S3 of the supporting part 22 or a plurality of spaced protrusions protruding outward. The second reinforcing part 222 is formed by a plurality of spaced recesses recessed inward from the tongue side surface of the supporting part 22 or a plurality of spaced protrusions protruding outward. This design not only improves the deformation resistance of the supporting part, but also increases the surface area of ​​the supporting part, which is beneficial for forming good contact with the surrounding tissue.

[0051] Furthermore, a number of spaced-apart recesses are distributed along the same straight line in the gingival-maxillary direction, or a number of spaced-apart protrusions are distributed along the same straight line in the gingival-maxillary direction. This design, with its unidirectional distribution along the same straight line in the gingival-maxillary direction, can directionally improve the deformation resistance of the support portion in the gingival-maxillary direction. It is understood that these recesses or protrusions, in addition to being distributed along the same straight line in the gingival-maxillary direction as illustrated in this embodiment, can also be distributed in other ways. For example, these recesses or protrusions can be distributed along the same straight line, but can have a certain angle of inclination in the gingival-maxillary direction; or, these recesses or protrusions can also be discretely distributed on the buccal or lingual surfaces of the support portion.

[0052] For further explanation, please refer to Figure 6 As shown. The first reinforcing part 221 extends from the end of the supporting part 22 near the occlusal part 21 along the gingival direction to the occlusal surface S2 of the occlusal part 21 to form a first reinforcing part extension 211. The second reinforcing part 222 extends from the end of the supporting part 22 near the occlusal part 21 along the gingival direction to the occlusal surface S2 of the occlusal part 21 to form a second reinforcing part extension 212. This makes it so that the entire repositioning jaw element 20 is continuously provided with reinforcing structures that can improve the resistance to deformation in the gingival direction, thereby improving the overall resistance to deformation of the repositioning jaw element 20 in the gingival direction.

[0053] To further enhance the connection stability between the reinforcing block 30 and the engagement portion 21, when the first reinforcing portion 221 extends upward to form a first reinforcing portion extension 211, a matching first mating portion 31 can also be provided on the reinforcing block 30 at the position corresponding to the first reinforcing portion extension 211. For example, the first mating portion 31 can be a structure that matches the concave and convex shape of the first reinforcing portion extension 211. Through the concave and convex matching of the first reinforcing portion extension 211 and the first mating portion 31, the connection between the reinforcing block 30 and the engagement portion 21 becomes more stable, thereby ensuring the anti-deformation ability of the engagement portion 21 during engagement. Similarly, when the second reinforcing portion 222 extends upward to form a second reinforcing portion extension 212, a matching second mating portion 32 can also be provided on the reinforcing block 30 at the position corresponding to the second reinforcing portion extension 212. For example, the second mating portion 32 can be a structure that matches the concave and convex shape of the second reinforcing portion extension 212. When the first reinforcing portion extension 211 and the second reinforcing portion extension 212 are provided simultaneously, please refer to... Figure 7 As shown, a first matching portion 31 and a second matching portion 32 that match the first reinforcing portion extension 211 and the second reinforcing portion extension 212 can be respectively provided on the cheek side and tongue side of the reinforcing block 30.

[0054] For further explanation, please refer to Figure 8 and Figure 9 As shown, the inner wall of the occlusal portion 21 is provided with a retention portion 40, and the outer wall of the reinforcing block 30 is provided with a mating portion 50 that cooperates with the retention portion 40. The retention portion 40 and the mating portion 50 cooperate to restrict the movement of the reinforcing block 30 in the gingival-maxillary direction. By cooperating with the mating portion 50, the movement of the reinforcing block 30 in the gingival-maxillary direction is restricted, enhancing the anti-deformation ability of the occlusal portion 21, thereby further improving the stability of the occlusal portion 21 and ensuring the achievement of the expected treatment effect. Specifically, the retention portion 40 can be recessed inward from one or more sides of the occlusal portion 21 to form a concave portion or protruded outward from a side of the occlusal portion 21 to form a convex portion. Figure 8 As shown, the retention part 40 can be a recessed part that is recessed inward from the buccal and lingual sides of the occlusal part 21, respectively. It can be provided on both the buccal and lingual sides, or only on the buccal or lingual sides. To further explain, in this embodiment, the cross-sectional shape of the recess is a trapezoidal structure, with the two inclined sides of the trapezoidal structure distributed in the gingival direction. The size of the recess in the gingival direction gradually decreases along the recessed direction, which is beneficial for guiding the reinforcing block 30 into or out when filling and removing the reinforcing block 30. It can be understood that the recess can also be a partially arc-shaped structure, a semi-circular structure, or other polygonal structures, which are not shown here. The buccal and lingual sides of the occlusal part 21 can also be provided with multiple recesses, or only the buccal or lingual sides of the occlusal part 21 can be provided with one or more recesses, which can be set based on actual cases. Correspondingly, the buccal and lingual lateral walls of the reinforcing block 30 are each provided with a mating portion 50 that matches the recess. The mating portion 50 and the recess can be matched concave and convex to restrict the movement of the reinforcing block 30 in the gingival-maxillary direction. For example... Figure 9 As shown, the retention portion 40 consists of three protrusions extending outward from the buccal and lingual surfaces of the occlusal portion 21, or one or more protrusions may be provided only on the buccal or lingual surfaces of the occlusal portion 21, depending on the specific case. Correspondingly, the buccal and lingual lateral walls of the reinforcing block 30 are each provided with three mating portions 50 that match the protrusions. The mating portions 50 and the protrusions can be concave-convexly matched to restrict the movement of the reinforcing block 30 in the gingival-maxillary direction.

[0055] To further explain, in order to ensure the connection stability between the reinforcing block 30 and the engagement portion 21, the reinforcing block 30 can be fixedly connected to the engagement portion 21 by adhesive bonding or laser welding. For example, it can be bonded with an ingestible adhesive, or welded using a laser. The engagement portion 21, which is designed with a retention portion 40, can also be further fixedly connected by adhesive bonding or laser welding, which can further ensure the connection stability between the reinforcing block 30 and the engagement portion 21.

[0056] Further, please see Figure 10 As shown, to ensure the reinforcing block 30 can be more securely filled into the occlusal portion 21, a support portion 60 can be provided at one end of the occlusal portion 21 near the support portion 22, capable of supporting at least part of the bottom surface of the reinforcing block 30. The support portion 60 can be circumferentially arranged along the inner wall of the occlusal portion 21 near the support portion 22 and protruding into the occlusal portion 21 by a predetermined width. Alternatively, it can be a plurality of support plate structures protruding into the occlusal portion 21 by a predetermined width from the inner wall of the occlusal portion 21 along the mesiodistal direction or the buccal-lingual direction. The support portion 60 can be formed from the material of the shell-shaped body 1 (i.e., an elastic transparent polymer material). When the reinforcing block 30 is filled into the occlusal portion 21, the support portion 60 is elastic, allowing the reinforcing block 30 to pass through and then be supported on the support portion 60 after passing through. The supporting part 60 can support the reinforcing block 30 in the gingival direction and restrict the movement of the reinforcing block 30 in the gingival direction. In this way, even when subjected to a large occlusal force, the reinforcing block 30 can be reliably fixed and filled in the interior of the occlusal part 21, thereby further ensuring the deformation resistance of the occlusal part 21.

[0057] It should be noted that the above embodiments can be freely combined as needed to form different new implementation schemes without causing contradictions. All implementation schemes formed by such combinations are within the protection scope of this application. In order to save space in the application text, they will not be described in detail here.

[0058] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the inventive principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this application.

[0059] Similarly, the above descriptions are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A shell-shaped dental instrument comprising a shell-shaped body for accommodating a tooth cavity of a patient's tooth, characterized in that, The shell-shaped body has a repositioning jaw element that reconstructs the occlusal position of the upper and lower jaws, protruding from the occlusal surface of the posterior tooth region towards the opposing jaw. The repositioning jaw element is a hollow cavity integrally formed with the shell-shaped body. The hollow cavity includes an occlusal portion that contacts the opposing jaw when worn and a support portion that supports the occlusal portion. The occlusal portion is provided with a reinforcing block to improve its resistance to deformation in the gingival direction. The outer contour shape of the reinforcing block matches the inner contour shape of the occlusal portion. The reinforcing block is fixedly connected to the occlusal portion, and the top surface of the reinforcing block is in contact with the inner surface of the occlusal surface of the occlusal portion. The buccal side of the support has several first reinforcing parts that improve the resistance to deformation of the support in the gingival-maxillary direction. The first reinforcing parts are formed by the buccal side of the support inward or outward. The lingual side of the support has several second reinforcing parts that improve the resistance to deformation of the support in the gingival-maxillary direction. The second reinforcing parts are formed by the lingual side of the support inward or outward.

2. The shell-shaped dental instrument according to claim 1, characterized in that, The inner wall of the occlusal portion is provided with a retention portion, and the outer wall of the reinforcing block is provided with a mating portion that cooperates with the retention portion. The retention portion and the mating portion cooperate to restrict the movement of the reinforcing block in the gingival-occlusal direction.

3. The shell-shaped dental instrument according to claim 2, characterized in that, The retaining portion is a recessed portion formed by one or more sides of the occlusal portion, or a protruding portion formed by an inward recess or an outward protrusion.

4. The shell-shaped dental instrument according to claim 1 or 2, characterized in that, The reinforcing block is fixedly connected to the interlocking part by adhesive bonding or laser welding.

5. The shell-shaped dental instrument according to claim 1, characterized in that, The outer surface of the occlusal surface of the occlusal part has a structure that matches the concave and convex features of the outer surface of the occlusal surface at the corresponding position of the opposing jaw.

6. The shell-shaped dental instrument according to claim 1, characterized in that, The height dimension of the occlusal portion in the gingival direction is 1 / 3 to 1 times the height dimension of the supporting portion in the gingival direction.

7. The shell-shaped dental instrument according to claim 1, characterized in that, The reinforcing block is a prefabricated structure made of a special intraoral modeling resin.

8. The shell-shaped dental instrument according to claim 1, characterized in that, The first reinforcing part is formed by a groove recessed inward from the buccal side of the support part or a ridge protruding outward from the lingual side of the support part. The second reinforcing part is formed by a groove recessed inward from the lingual side of the support part or a ridge protruding outward from the lingual side of the support part. The groove or the ridge extends along the gingival direction. The first reinforcing part and the second reinforcing part extend from one end of the support part near the occlusal part to one end of the support part near the shell-like body along the gingival direction to improve the deformation resistance of the support part in the gingival direction.

9. The shell-shaped dental instrument according to claim 8, characterized in that, The first reinforcing portion extends from the end of the support portion near the occlusal portion along the gingival direction to the occlusal surface of the occlusal portion to form a first reinforcing portion extension portion, and the second reinforcing portion extends from the end of the support portion near the occlusal portion along the gingival direction to the occlusal surface of the occlusal portion to form a second reinforcing portion extension portion, so as to improve the overall anti-deformation ability of the repositioning occlusal element in the gingival direction.

10. The shell-shaped dental instrument according to claim 1, characterized in that, The first reinforcing part is formed by a plurality of spaced recesses inward from the cheek side of the supporting part or a plurality of spaced protrusions outward from the cheek side of the supporting part. The second reinforcing part is formed by a plurality of spaced recesses inward from the tongue side of the supporting part or a plurality of spaced protrusions outward from the tongue side of the supporting part.

11. The shell-shaped dental instrument according to claim 10, characterized in that, Several spaced-apart depressions are distributed along the same straight line in the gingival-maxillary direction, or several spaced-apart protrusions are distributed along the same straight line in the gingival-maxillary direction.

12. The shell-shaped dental instrument according to claim 9, characterized in that, The reinforcing block is provided with a first matching part at the position corresponding to the extension of the first reinforcing part, and / or the reinforcing block is provided with a second matching part at the position corresponding to the extension of the second reinforcing part.

13. The shell-shaped dental instrument according to claim 1, characterized in that, The spacing between the plurality of first reinforcing portions in the mesio-distal direction is equal, and / or the spacing between the plurality of second reinforcing portions in the mesio-distal direction is equal.

14. The shell-shaped dental instrument according to claim 1 or 13, characterized in that, At least two adjacent first reinforcing portions and second reinforcing portions are staggered in the near-far direction.

Images