Cup-shaped dental instrument and orthodontic system

Abstract

A shell-shaped dental instrument configured for wear on a maxillary dentition, comprising a shell-shaped body (1) with a plurality of tooth-receiving cavities (11), wherein the shell-shaped body (1) is further provided with an adjusting section (2) in a palatal region and the adjusting section (2) is configured to establish a relative maxillary-mandibular positional relationship, and comprising a first guide section (21) and a support (22) for supporting the first guide section (21), wherein the first guide section (21) is configured to extend over a portion of the palate corresponding to an anterior dental region and is connected to the lingual free ends of at least two tooth-receiving cavities (11) of the plurality of tooth-receiving cavities (11) in the anterior dental region, wherein the first guide section (21) is configured to be inclined towards a mandibular plane of a mandible.to enable some anterior teeth on the mandible to slide along the first guiding section (21) and advance the mandible into an orthodontic target position; wherein the support (22) is connected to the first guiding section (21) and is configured to extend from the gingival ends of some of the plurality of tooth receiving cavities (11) in a posterior tooth region towards the palate and is partially supported on the palate when the shell-shaped dental instrument is worn.

Description

TECHNICAL FIELDEmbodiments of the present disclosure relate to the field of orthodontics, and more particularly, to a cup-shaped dental instrument and orthodontic system.BACKGROUNDPrognostic malocclusion is a common dentomaxillofalic problem in the orient, and a large portion of the prognostic malocclusions manifest themselves by Unterkieferretrusion especially in children due to oral breathing problems. In the case of a sub-jaw reconstruction, a correction of the sub-jaw position is required in order to guide the sub-jaw forwards in the sagittal direction. Orthodontic devices that are widely used at present include a tilted Oberkieferaufbissebene a twin-block (TB) device, and the like. For the TB device, it is necessary to place blocks in the range of the first molar of the bilateral upper jaw premolars and in the range of the lower jaw premolars. In juvenile patients at the denture stage, where the lateral teeth are in replacement or are about to be lost, the use of TB does not provide a good support to solve the retention problem arising from the frequent replacement of the teeth during the denture stage.In the prior art, the inclined upper jaw bite plane is also used as a removable orthodontic appliance to perform orthodontic treatment of the symptom of the lower jaw reconstruction, which frequently occurs in clinical practice in juveniles. The movable orthodontic appliance is typically a clip, retainer, etc., is larger and more foreign in the patient's mouth, and has less aesthetic and comfort.To this end, the present disclosure provides a solution to the above-mentioned problems.SUMMARYEmbodiments of the present disclosure provide a tray-shaped dental instrument and orthodontic system to overcome the shortcomings of the prior art.In the present disclosure, in order to achieve the above object, the technical solutions described below are applied.A cup-shaped dental instrument is provided. The cup-shaped dental instrument is configured for support on a maxilla denture and comprises a cup-shaped body provided with a plurality of cavities for receiving the teeth. The cup-shaped body is also provided with an adjustment portion in a palatal region, and the adjustment portion is configured to adjust a relative upper jaw-lower jaw positional relationship. The adjusting portion includes a first guide portion and a support for supporting the first guide portion. The first guide portion is configured to extend over a portion of a palatal corresponding to a front tooth region and is connected to the lingual side free ends of at least two tooth receiving cavities of the plurality of tooth receiving cavities in the front tooth region. The first guide portion is configured to be inclined to a lower jaw plane of a lower jaw to allow some front teeth on the lower jaw to slide along the first guide portion and to slide the lower jaw forward to a target orthodontic position. The post is connected to the first guide portion and is configured to extend from gingival ends of some of the plurality of tooth receiving cavities in a posterior dental region toward the palatal and to be partially supported on the palatal when the cup-shaped dental instrument is worn.An orthodontic system is provided. The dental instrument system comprises a plurality of tray-shaped dental instruments. At least one cup-shaped dental instrument of the plurality of cup-shaped dental instruments is the above-described cup-shaped dental instrument, and the plurality of cup-shaped dental instruments has a geometric configuration configured to incrementally displace teeth from a home position to a target position while displacing a lower jaw from a first position to a second position.In the cup-shaped dental instrument of the present disclosure, the first guide portion is disposed in the palatal region to adjust the movement of the lower jaw in the sagittal direction, and the support connected to the first guide portion is disposed in the palatal region. When carrying the cup-shaped dental instrument, the first guide portion can guide the patient's lower jaw forward in the occlusion process. With the first guide portion and the support disposed in the palatal region, the reaction force generated when the lower jaw is moved is applied to the patient's palatal, so that the negative effects on the front teeth of the upper jaw in the process of correcting the lower jaw are reduced and the orthodontic effect is improved. Moreover, the second guide portion disposed between the tooth receiving cavities and the first guide portion cooperates with the first guide portion, so that besides solving the problem of the lower jaw reconstruction of the bite, it can be opened further to solve the problem of the deep bite and the deep horizontal bite, thereby realizing the orthodontic treatment for prognostic malocclusion in juveniles.Moreover, the present disclosure also provides an orthodontic system including a plurality of cup-shaped dental instruments. In the orthodontic system, at least two cup-shaped dental instruments that are used one after another include the second guide portion and the second guide portion, and with the plurality of cup-shaped dental instruments, a plurality of target positions are set between the orthodontic initial position and the orthodontic target position, thereby improving the comfort of the orthodontic process and avoiding the problem of the posterior open bite that occurs when the bite is opened.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a schematic structural view of a cup-shaped dental instrument according to an embodiment of the present disclosure. FIG. 2 is a front view showing the structure of the tray-shaped dental instrument in FIG. 1. FIG. 3 is a cross-sectional view of FIG. 2 taken along a direction A-A'. FIG. 4 is a schematic structural view of a cup-shaped dental instrument according to another embodiment of the present disclosure. FIG. 5 is a cross-sectional view of FIG. 4 taken along a direction B-B'. FIG. 6 is another cross-sectional view of FIG. 4 taken along a direction B-B'. FIG. 7 is still another cross-sectional view of FIG. 4 taken along a direction B-B'. FIG. 8 is a schematic structural view of a cup-shaped dental instrument according to another embodiment of the present disclosure. FIG. 9 is a schematic structural view of a cup-shaped dental instrument according to another embodiment of the present disclosure. FIG. 10 is a cross-sectional view of FIG. 9 taken along a direction P-P'. FIG. 11 is a schematic structural view of a cup-shaped dental instrument according to another embodiment of the present disclosure. FIG. 12 is a schematic structural view of a cup-shaped dental instrument according to another embodiment of the present disclosure. FIG. 13 is a schematic structural view of a cup-shaped dental instrument according to another embodiment of the present disclosure. FIG. 14 is a cross-sectional view of two cup-shaped dental instruments sequentially used in the dental instrument system of the present disclosure.DETAILED DESCRIPTION OF THE EMBODIMENTSThe present disclosure addresses the technical problem of overcoming the deficiencies of the prior art by providing a novel shell shaped dental instrument and orthodontic system for treating sub-jaw reconstructions as well as deep overbis and deep horizontal overbis problems in Jugendians. In the prior art, in a lower jaw reconstruction, a device for advancing the lower jaw is usually provided on the lingual-side surface of the upper jaw denture. However, if the lower jaw is guided forward by such a device, the front upper jaw teeth would be pulled rearward by the lower jaw, which would lead to an undesirable lingual inclination of the front upper jaw teeth. In the present disclosure, the device for advancing the lower jaw and opening the bite is configured to be disposed on the palatal so that the undesirable force generated when the lower jaw is advanced is applied to the palatal and the adjustment portion in the palatal region, thereby reducing the likelihood of lingual inclination of the upper jaw front teeth.The "posterior tooth region" referred to in various embodiments of the present disclosure is defined according to the classification of teeth on pages 36-38 of "Introduction of Stomatology" in the 2nd edition, edited by Beking University Medical Press, and includes premolars and molars. The posterior tooth region is represented by a Federation Dental International (FDI) labeling method as teeth 4-8, and the anterior tooth region is represented by the FDI labeling method as teeth 1-3. The teeth in the front tooth region include the central cutting teeth, the lateral cutting teeth and the canine teeth. Moreover, for describing the teeth in the dairy period, the "rear tooth portion" is defined according to the classification of dairy teeth on pages 40-41 of the "Introduction of Stomatology" in the 2nd edition, edited by Beking University Medical Press, and includes three types, namely, dairy cutting teeth, dairy corner teeth, and dairy jaw teeth. The milk cutting teeth include the middle and lateral milk cutting teeth, and the milk jaw teeth include the first and second molars. The cup-shaped dental instrument of the present disclosure is mainly worn on a dairy upper jaw denture or a replacement denture in the upper jaw.In order to achieve the above objects, the following technical solutions are applied in the present disclosure.A cup-shaped dental instrument is made of a polymer material, is configured to be worn on a maxilla denture, and comprises a cup-shaped body 1. the cup-shaped body 1 is provided with a plurality of tooth receiving cavities 11 and an adjusting portion 2 in a palatal region. The setting section 2 is configured to set a relative upper jaw-lower jaw positional relationship. In some embodiments illustrated with reference to FIG. 1, the adjustment portion 2 includes a first guide portion 21 and a support 22 for supporting the first guide portion 21. the first guide portion 21 extends over a part of the palatal corresponding to a front tooth area and is connected to the lingual side free ends of at least two tooth receiving cavities in the front tooth area. In some embodiments, as illustrated in FIG. 1, the first guide portion 21 is connected to the lingual side free ends of all the tooth receiving cavities 11 in the front tooth region and is formed to extend from the lingual side free ends of at least two tooth receiving cavities in the front tooth region toward an opposite jaw and in a direction away from the front teeth.The lingual-side free end here means in particular an end of the tooth receiving cavity 11 adjacent to the gum on the lingual side of the tooth receiving cavity 11 so that a lingual-side surface of the tooth receiving cavity 11 connected to the first guide portion 21 does not cover an entire lingual-side surface of the corresponding tooth in the front tooth region. Referring to FIGS. 2 and 3, the first guide portion 21 is inclined to a mandibular plane to allow some front teeth on the lower jaw to slide along the first guide portion 21 and push the lower jaw forward to an orthodontic target position. The lower jaw plane is a plane formed by the mesial approximate point of the middle lower jaw cutting teeth and the distal buccal tips of the last molars on both sides of the lower jaw. When the patient wears the cup-shaped dental instrument of the present disclosure in the upper jaw, the cutting ends of the front teeth of the lower jaw slide forward to the orthodontic target position along the first guide surface 211 of the first guide portion 21 during the occlusion. The first guide surface 211 is a curved surface corresponding to the shape of the dental arch, and the first guide surface 211 is configured to have a tangential plane above any point on the first guide surface 211, wherein an angle between the tangential plane and the mandibular plane is greater than 0° and less than or equal to 45° to allow the cutting ends of the mandibular front teeth to contact the first guide surface 211 and slide along the first guide surface 211.In some embodiments, the first guide portion 21 is provided with a first guide surface 211, the first guide surface 211 is a curved surface, and an angle between a tangential plane above an arbitrary point on the first guide surface 211 and the mandibular plane is greater than 0° less than or equal to 45°.In some embodiments, a surface of the column 22 attached to the palatal coincides with a surface of a palatal fold at a corresponding location on the palatal.Referring to FIGS. 1 and 2, the support 22 is configured to extend from the lingual ends of a plurality of tooth receiving cavities 11 in the rear tooth region toward palatal, or the support 22 is configured to extend from the lingual ends of a plurality of tooth receiving cavities 11 in the rear tooth region and a plurality of tooth receiving cavities 11 in a part of the front tooth region toward palatal, a portion of the support 22 adjacent to the front tooth region extending to be connected to the first guide portion 21. When the cup-shaped dental instrument is worn, the support 22 partially abuts the palatal. In some embodiments, referring to FIG. 2, the post 22 is configured to be attached to a portion of the palatal adjacent to the teeth in the posterior tooth region and to extend over a portion of the palatal corresponding to the teeth 3 to 4, and the surface of the palatal post 22 is coincident with the corresponding location on the surface of the palatal, that is, the surface of the palatal post 22 and the surface of the palatal at the corresponding location are structurally consistent and attached to each other. The support 22 serves mainly to improve the integrity of the adjustment portion 2 when the first guide portion 21 guides the lower jaw forward, and thereby achieves the effect of improving the strength of the adjustment portion 2, so that the first guide portion 21 is less liable to deform when the lower jaw is guided forward. At the same time, by the connection between the support 22 and the first guide portion 21, the undesired force generated when the lower jaw is advanced is partially transmitted to the support 22 and a palatal region to which the support 22 is fixed, thereby reducing the undesired lingual inclination of the upper jaw front teeth.In some embodiments, referring to FIGS. 4 and 5, the adjustment portion 2 further includes a second guide portion 23, wherein a tooth proximal end of the second guide portion 23 is connected to lingual side free ends 11 of at least two tooth receiving cavities in the front tooth region, and a tooth distal end of the second guide portion 23 is connected to a tooth proximal end of the first guide portion 21. In some embodiments, the second guide portion 23 is connected to the lingual side free ends of all the tooth receiving cavities 11 in the front tooth region, and the tooth receiving cavity 11 connected to the second guide portion 23 covers only a iliac side surface and a cutting end portion of the corresponding tooth. The second guide portion 23 is provided with a second guide surface 231 configured to depress the mandibular front teeth, and a part of the second guide surface 231 configured to contact a cutting end of a mandibular front tooth is a plane perpendicular to a longitudinal axis of the mandibular front tooth. In an embodiment, as illustrated in FIG. 5, the second guide portion 23 and the first guide portion 21 have an inverted V-shaped cross section in a sagittal plane, that is, the cross section of the first guide surface 211 and the second guide surface 231 in the sagittal plane has the shape of an inverted "V", and an included angle α of the inverted "V" shape is greater than 45° and less than or equal to 150°. When the cup-shaped dental instrument is worn, the cutting ends of some of the front lower jaw teeth are located at a joint of the second guide portion 23 and the first guide portion 21.In some embodiments, the second guide portion 23 is provided with a second guide surface 231 configured to depress the mandibular front teeth, and a part of the second guide surface 231 configured to contact a cutting end of a mandibular front tooth is a plane perpendicular to a longitudinal axis of the mandibular front tooth.With continued reference to FIG. 4, in some embodiments, at least one of the first guide portion 21 and the second guide portion 23 is arranged symmetrically about the tooth center line. Due to the symmetrical arrangement about the tooth center line, a force absorbed by the adjusting section 2 is likewise symmetrical about the tooth center line, whereby a force equilibrium is achieved.In some embodiments, a minimum length of a protrusion of the first guide portion 21 on a horizontal plane in the sagittal direction is a distance by which the lower jaw needs to be moved in the sagittal direction according to an orthodontic plan.In some embodiments, the joint is configured to have a distance of 0 mm to 2 mm from the palatal fold.Referring to FIGS. 5 and 6, the minimum length x of the protrusion of the first guide portion 21 on the horizontal plane in the sagittal direction is the distance by which the lower jaw needs to be moved in the sagittal direction according to the orthodontic plan. When the patient wears the cup-shaped dental instrument, the cutting end of the front tooth of the lower jaw slides along the first guide portion 21 to the joint between the first guide portion 21 and the second guide portion 23 during occlusion, and finally remains stably at this joint. The joint is configured to have a distance H 1 of 0 mm to 2 mm from the palatal fold to set a vertical positional relationship between upper and lower jaws and to open the bite at deep bite and deep horizontal bite. The tray-shaped dental instrument must generally be worn for 7 to 14 days. During this wearing period, the shell-shaped dental instrument can continuously stimulate the growth and development of the lower jaw over a long period of time, whereby the lower jaw muscles can form a new biomechanical equilibrium in a new position, so that the lower jaw can remain in the target position even after wearing the shell-shaped dental instrument.In some embodiments, further referring to FIG. 6, the first guide portion 21 has a first palatinal-side surface that is a surface of the first guide portion 21 near the palatinal side. A distance H 2 between the first palatinal-side surface and the palatal pleat in the vertical direction is 0 mm to 2 mm. When the distance between the first palatinal-side surface and the palatal pleat is 0 mm, the first palatinal-side surface is attached to the palatal pleat. In some embodiments, a surface structure of the first palatinal-side surface matches a surface structure of the palatal fold at the corresponding position, and the first palatinal-side surface perfectly matches the palatal fold, which increases wearing comfort and also improves the strength of the adjusting portion 2.In some embodiments (see FIG. 7 ), the second guide portion 23 at least partially has no contact with a lingual-side surface of a tooth 3 in the front tooth region. In some embodiments, the second guide portion 23 remains in a gap with the lingual surface of the corresponding tooth 3 throughout wearing, whereby an undesirable force that the second guide portion 23 exerts on the corresponding tooth 3 during wearing can be effectively reduced. In some embodiments, the deformation resistance of the second guide portion 23 can be increased by changing the material of the second guide portion 23 to use a material having a rigidity greater than the rigidity of the tooth receiving cavity 11.In some embodiments, the tooth receiving cavity 11 in the anterior tooth region does not contact the iliac side of the corresponding anterior tooth. For example, the tooth receiving cavity 11 in the front tooth portion has a iliac-side inner surface configured to form a gap with an outer surface of the corresponding front tooth, or the tooth receiving cavity 11 in the front tooth portion has a hollowed iliac-side surface in the front tooth portion. With respect to the shell-shaped dental instrument shown in FIG. 8, the tooth receiving cavities 11 in the front tooth region each have a hollowed-out, labial-side surface, so that when the shell-shaped dental instrument is worn, the tooth receiving cavities 11 in the front tooth region do not exert orthodontic forces or other forces on the front teeth.In some embodiments, as illustrated in FIGS. 9 to 11, the bracket 22 is connected to the first guide portion 21 through a connecting portion 221 provided with a tongue guide portion 211 a. The tongue guide portion 211 ais configured to cause the tip of the tongue to be adjusted to the orthodontic target position. In particular, by leaking the tongue guide portion 211a for a longer time, the patient can eliminate the change in morphology of the dental arch and alveolar bone caused by poor tongue habits. Most tooth malpositions in children are due to poor oral habits. The cup-shaped dental instrument of the present disclosure is configured to perform synchronous orthodontic treatment of the tongue while orthodontically treating the tooth dislocation by using the designed tongue guide portion 211 a. Thereby, secondary tooth dislocations caused by poor tongue habits are eliminated after completion of the subsequent orthodontic treatment. In some embodiments, the tongue guide portion 211 ais a geometric structure configured to be raised or recessed toward the tongue. Referring to FIG. 10, the tongue guide portion 211 ahas a fixed structure, or the tongue guide portion 211 ahas a closed hollow structure when the tongue guide portion 211 ahas a geometric structure configured to be raised toward the tongue. When the tongue guide portion 211 ahas the geometric structure configured to be recessed toward the tongue as illustrated in FIG. 11, the tongue guide portion 211 acan be directly formed by recessing the surface of the connection portion 221 toward the front tooth region. The tongue guide portion 211 amay be formed as a semicircular, triangular, or other polygonal structure.In some embodiments, a modulus of elasticity of the first guide portion 21 is larger than a modulus of elasticity of the cup-shaped body 1, thereby ensuring that the first guide portion 21 is not deformed during use, which improves orthodontic precision. For example, the cup-shaped body 1 may be made of a material having an elastic modulus in the range of 0.2 MPa to 500 MPa, and the first guide portion 21 may be made of a material having an elastic modulus in the range of 0.5 MPa to 600 MPa. In an embodiment, the first guide portion 21 may be formed to have a greater rigidity than the cup-shaped body 1. For example, the first guide portion 21 has a solid structure or a multilayer structure, and when the above-mentioned structure is adopted, the cup-shaped dental instrument can be manufactured using a generative manufacturing method.In some embodiments, the first guide portion 21 includes reinforcing portions 4 arranged in the sagittal direction.In some embodiments, reinforcing ribs may be formed on the adjustment portion 2 to increase the deformation resistance of the adjustment portion 2 and improve orthodontic precision. Referring to FIG. 12, the reinforcing portions 4 may be disposed on the surface of the connection portion 221 and are structurally provided by forming a plurality of protrusions or recesses on the surface of the connection portion 22. In an embodiment, as illustrated in FIG. 13, the reinforcing portions 4 are disposed on the first guide surface 211 of the first guide portion 21. In some embodiments, the reinforcing portions 4 are reinforcing ribs formed by partially raising or recessing the first guide portion 21 toward the tongue, and the reinforcing portions 4 must be disposed in the sagittal direction to avoid the formation of obstacles when the mandibular front teeth slide on the first guide portion 21.The present disclosure also includes an orthodontic system that includes a plurality of cup-shaped dental instruments. The plurality of tray-shaped dental instruments includes at least one tray-shaped dental instrument of any of the above-described embodiments. The plurality of tray-shaped dental instruments have a geometric configuration configured to incrementally translate each individual tooth from a home position to a target position while displacing a lower jaw from a first position to a second position. The final target position at the end of orthodontic treatment is typically that the lower jaw cutting tooth is located at a normal, labial inclination below the conjunctiva of the upper jaw cutting tooth.In some embodiments, referring to FIG. 14, the adjusting portion 2 of each of at least two cup-shaped dental instruments that are used one after another and included in the orthodontic system includes a second guide portion 23, a tooth proximal end of the second guide portion 23 is connected to lingual-side free ends of at least two cup-shaped dental instruments in the front tooth region, and a tooth distal end of the second guide portion 23 is connected to a tooth proximal end of the first guide portion 21, the second guide portion 23 and the first guide portion 21 having an inverted V-shaped cross section in a sagittal plane. When the cup-shaped dental instrument is worn, the cutting ends of some of the front teeth of the lower jaw are located at a joint of the second guide portion 23 and the first guide portion 21, and in various cup-shaped dental instruments, the included angle α between the first guide surface 211 and the second guide surface 231 gradually increases in the course of orthodontic process. In some embodiments, in the at least two cup-shaped dental instruments used sequentially, a distance H 1 between a junction in a cup-shaped dental instrument in a subsequent step and the palatal fold in the vertical direction is larger than a distance H 1 between a junction in a cup-shaped dental instrument in a previous step and the palatal fold in the vertical direction. In the further course of the orthodontic process, the distance H1 between the joint of the cup-shaped dental instrument in the subsequent step and the palatal fold in the vertical direction is greater by 0.1 mm than the distance H1 between the joint of the cup-shaped dental instrument in the previous step and the palatal fold in the vertical direction. The cup-shaped dental instruments having the second guide portions 23 in the orthodontic system may be configured to cause stepwise depression of the front teeth of the lower jaw to open the bite, thereby solving deep bite and deep horizontal bite problems. The advantage of gradually shaping the pressure is that such a design avoids the open posterior bite problem that would occur if the mandibular anterior teeth were pressed down in one step.It should be noted that in the orthodontic method, a cup-shaped dental instrument must be carried in each orthodontic step, and the terms "previous step" and "subsequent step" are intended to mean the use of two cup-shaped dental instruments used one after the other, namely one cup-shaped dental instrument in a certain step and the other cup-shaped dental instrument in a step subsequent to the certain step. Typically, the tray-shaped dental instruments in the present disclosure have a wear cycle of 7 to 14 days.In some embodiments, in the orthodontic system, protrusions of the first guide portions of at least two cup-shaped dental instruments, which are sequentially used, have the same minimum length in the sagittal direction on the horizontal plane. Alternatively, as illustrated in FIG. 14, in the at least two cup-shaped dental instruments that are used sequentially, a minimum length of the protrusion of the first guide portion 21 of the cup-shaped dental instrument in the subsequent step on the horizontal plane in the sagittal direction (i.e., the X direction in FIG. 14 ) is larger than a minimum length of the protrusion of the first guide portion 21 in the cup-shaped dental instrument in the previous step on the horizontal plane. In FIG. 14, L represents a difference between the minimum lengths of the protrusions of the first guide portions 21 on the horizontal plane in the sagittal direction in two successive steps, and L takes a value of 0.1 mm to 0.2 mm. The minimum length of the protrusion of the first guide portion 21 on the horizontal plane in the sagittal direction is a distance by which the lower jaw is guided by the first guide portion 21 to slide forward in the sagittal direction.Note that the above embodiments can all be freely combined to form various new embodiments as needed without causing contradictions. Embodiments formed according to such combinations are all within the scope of the present disclosure and are not repeated herein to reduce the length of text of the present disclosure.The above-mentioned details are merely preferred embodiments of the present disclosure. It should be appreciated that numerous modifications and variations can be made by those skilled in the art without departing from the principles of the present disclosure. These modifications and variations are to be considered as falling within the scope of the present disclosure.Also, the above-mentioned information is only exemplary embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and changes or substitutions readily conceivable to those skilled in the art within the technology scope of the present disclosure are intended to fall within the scope of the present disclosure. The scope of the present disclosure is therefore to be determined according to the scope of the appended claims.

Claims

A cup-shaped dental instrument configured to be supported on a maxilla denture and comprising a cup-shaped body (1) having a plurality of tooth receiving cavities (11), wherein the cup-shaped body (1) is further provided with an adjusting portion (2) in a palatal area, and the adjusting portion (2) is configured to adjust a relative maxilla-maxilla positional relationship, and includes a first guide portion (21) and a support (22) for supporting the first guide portion (21), wherein the first guide portion (21) is configured to pass over a part of a palatal corresponding to a front tooth area and connected to lingual-side free ends of at least two tooth receiving cavities (11) of the plurality of tooth receiving cavities (11) in the front tooth area, wherein the first guide portion (21) is configured to be inclined to a lower jaw plane of a lower jaw to allow some front teeth on the lower jaw to slide along the first guide portion (21) and to push the lower jaw forward to an orthodontic target position; wherein the support (22) is connected to the first guide portion (21) and is configured to extend from gingival ends of some of the plurality of tooth receiving cavities (11) in a rear tooth region toward gums and to be partially supported on the gums when the cup-shaped dental instrument is being worn.The cup-shaped dental instrument according to claim 1, wherein the first guide portion (21) is configured to extend from the lingual free ends of the at least two tooth receiving cavities (11) in the front tooth region toward an opposite jaw and in a direction away from the front teeth.The cup-shaped dental instrument according to claim 2, wherein the first guide portion (21) is provided with a first guide surface (211), the first guide surface (211) is a curved surface, and the first guide surface (211) is configured to have a tangential plane over any point on the first guide surface (211), wherein an angle between the tangential plane and the sub-jaw plane is greater than 0° and less than or equal to 45°.The cup-shaped dental instrument according to claim 1, wherein the adjusting portion (2) further includes a second guide portion (23), a tooth proximal end of the second guide portion (23) is connected to the lingual side free ends of the at least two tooth receiving cavities (11) in the front tooth region, and a tooth distal end of the second guide portion (23) is connected to a tooth proximal end of the first guide portion (21).The cup-shaped dental instrument according to claim 4, wherein the second guide portion (23) is provided with a second guide surface (231) configured to depress the front teeth of the lower jaw, and a part of the second guide surface (231) configured to contact the cutting ends of the front teeth of the lower jaw is a plane perpendicular to the tooth longitudinal axes of the front teeth of the lower jaw.The tray-shaped dental instrument according to claim 4 or 5, wherein the second guide portion (23) and the first guide portion (21) have an inverted "V" shaped cross section in a sagittal plane, wherein an included angle (α) of the inverted "V" shape is greater than 45° and less than or equal to 150°, and wherein when the tray-shaped dental instrument is worn, the cutting ends of some of the front teeth of the lower jaw are located at a connection point of the second guide portion (23) and the first guide portion (21).The cup-shaped dental instrument according to any one of claims 1 to 6, wherein a minimum length of a protrusion of the first guide portion (21) on a horizontal plane in the sagittal direction corresponds to a distance by which the lower jaw needs to be moved according to an orthodontic plan in the sagittal direction.The tray-shaped dental instrument of claim 6, wherein the joint is configured to have a distance of 0 mm to 2 mm from a palatal fold.The cup-shaped dental instrument according to any one of claims 1 to 8, wherein the first guide portion (21) has a palatinal-side first surface configured to have a distance of 0 mm to 2 mm from a palatal crease in the vertical direction.The tray-shaped dental instrument of claim 9, wherein the first palatinal-side surface has a surface structure configured to conform at a corresponding location to a surface structure of the palatal fold.The cup-shaped dental instrument according to any one of claims 4 to 10, wherein the second guide portion (23) is configured so as to at least partially have no contact with lingual-side surfaces of teeth in the front tooth region.The cup-shaped dental instrument according to any one of claims 1 to 11, wherein the first guide portion (21) is symmetrically disposed about a tooth center line.The cup-shaped dental instrument according to any one of claims 4 to 12, wherein the second guide portion (23) is symmetrically disposed about a tooth center line.The cup-shaped dental instrument according to any one of claims 1 to 13, wherein the at least two tooth receiving cavities (11) in the front tooth region are configured so as not to have contact with the iliac side surfaces of the respective front teeth.The tray-shaped dental instrument of claim 14, wherein each of the at least two tooth receiving cavities (11) in the anterior tooth region has a iliac-side inner surface configured to form a gap with an outer surface of a respective anterior tooth of the corresponding anterior teeth, or wherein each of the at least two tooth receiving cavities (11) in the anterior tooth region has a hollowed iliac-side surface.The cup-shaped dental instrument according to any one of claims 1 to 15, wherein the support (22) is connected to the first guide portion (21) by a connecting portion (221), the connecting portion (221) is provided with a tongue guide portion (211a), and the tongue guide portion (211a) is a geometric structure configured to be raised or recessed toward a tongue.The cup-shaped dental instrument according to claim 16, wherein the tongue guide portion (211a) has a fixed structure when the tongue guide portion (211a) has the geometric structure configured to be raised toward the tongue.The cup-shaped dental instrument according to claim 16, wherein the tongue guide portion (211a) has a hollow structure when the tongue guide portion (211a) has the geometric structure configured to be raised toward the tongue.The tray-shaped dental instrument of any one of claims 1 to 18, wherein a surface of the support (22) configured for attachment to the palatal is configured to conform to a surface of a palatal fold at a corresponding location on the palatal.The cup-shaped dental instrument according to any one of claims 1 to 19, wherein the first guide portion includes a reinforcing portion disposed in the sagittal direction.The cup-shaped dental instrument according to claim 20, wherein the reinforcing portion (4) is a reinforcing rib formed by partially raising or recessing a part of the first guide portion (21) toward a tongue.A dental instrument system comprising a plurality of tray-shaped dental instruments, wherein the plurality of tray-shaped dental instruments includes at least one tray-shaped dental instrument according to any one of claims 1 to 21, and the plurality of tray-shaped dental instruments have a geometric configuration configured to incrementally displace teeth from a home position to a target position while adjusting a lower jaw from a first position to a second position.The dental instrument system according to claim 22, wherein the adjusting portion (2) of each respective cup-shaped dental instrument of at least two cup-shaped dental instruments out of the plurality of cup-shaped dental instruments used sequentially further includes a second guide portion (23), a tooth proximal end of the second guide portion (23) is connected to the lingual side free ends of the at least two tooth receiving cavities (11) in the front tooth region, and a tooth distal end of the second guide portion (23) is connected to a tooth proximal end of the first guide portion (21), the second guide portion (23) and the first guide portion (21) have an inverted "V"-shaped cross section in a sagittal plane, wherein, when carrying the respective cup-shaped dental instrument, the cutting ends of some of the front lower jaw teeth are located at a connection point of the second guide portion (23) and the first guide portion (21).The dental instrument system according to claim 23, wherein in the at least two cup-shaped dental instruments used sequentially, the joint in a cup-shaped dental instrument in a subsequent step is configured to have a first distance from a palatal fold in the vertical direction, and a joint in a cup-shaped dental instrument in a previous step is configured to have a second distance from the palatal fold in the vertical direction, the first distance being greater than the second distance.The dental instrument system according to claim 22, wherein protrusions of the first guide portions (21) in the at least two cup-shaped dental instruments that are sequentially used have the same minimum length in the sagittal direction on a horizontal plane.The dental instrument system according to claim 22, wherein in the at least two cup-shaped dental instruments used sequentially, a minimum length of a protrusion of a first guide portion (21) of a cup-shaped dental instrument in a subsequent step on a horizontal plane in the sagittal direction is greater than a minimum length of a protrusion of a first guide portion (21) of a cup-shaped dental instrument in a previous step on the horizontal plane in the sagittal direction.

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