Dental instrument

Abstract

The utility model discloses a dental instrument which comprises a shell-shaped dental appliance and a traction assembly, the traction assembly comprises a mounting base and a traction accessory, the traction accessory comprises a traction part, a connecting part and a first mounting part, the mounting base comprises a second mounting part, and the traction accessory is fixedly connected with the mounting base in a detachable mode through cooperation of the first mounting part and the second mounting part; the shell-shaped dental appliance comprises a plurality of cavities for accommodating teeth of a patient and an accommodating cavity for accommodating the mounting base; the containing cavity comprises a through hole penetrating through the inner side and the outer side of the containing cavity, the first installation part is matched with the second installation part after passing through the through hole, or the second installation part is matched with the first installation part after passing through the through hole, so that the traction accessory is installed on the installation base, and the traction part is located on the outer side of the containing cavity; when the orthodontic device is worn, the accommodating cavity is at least partially contacted with the mounting base so as to generate first orthodontic force; the traction part is used for hooking a traction piece so as to apply a second orthodontic force to the teeth corresponding to the mounting base.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, more exactly, the field of oral appliances, and particularly relates to a dental instrument. BACKGROUND

[0002] In the field of orthodontics, with the progress of technology, invisible aligners have emerged as the times require. Invisible aligners are a kind of tooth aligners made of high-molecular transparent elastic material through computer-aided design. For example, modern invisible shell-shaped dental aligners are a series of continuous active aligners that achieve the purpose of tooth alignment through continuous small-range tooth movement. They have the advantages of being aesthetically pleasing, convenient, weak foreign body sensation, and conducive to cleaning, and are increasingly accepted and used by patients. This aligning device not only controls the size of the aligning force, but also controls the time of the aligning force. Only certain teeth can move in different aligning stages, while other teeth act as anchorage, thereby completing the alignment of the teeth.

[0003] In the field of invisible alignment, when using shell-shaped dental aligners for orthodontic treatment, it is difficult for the elasticity of the transparent elastic material to meet the treatment needs for some severely deformed orthodontic cases, and the control force on the teeth is poor, making it difficult to achieve overall tooth movement. Sometimes, auxiliary treatment is needed with the help of traction accessories or other functional accessories, such as functional accessories that assist in tooth translation, rotation, depression, elongation, and inclination. These accessories are usually attached to the surface of the teeth and are wrapped by the shell-shaped dental aligners. The auxiliary aligning force can directly act on the teeth to assist in achieving the desired treatment effect. However, for severely deformed teeth, setting only these functional accessories often results in insufficient auxiliary aligning force, thereby prolonging the treatment time, which is undesirable for patients. Currently, in the field of invisible alignment, there are schemes that increase traction on the surface of the teeth to provide traction to supplement the auxiliary aligning force. However, the current traction is mostly avoided by opening the edge of the shell-shaped dental aligner near the gum to form an avoidance area. This scheme still has the following defects: the current traction set on the surface of the teeth must form an avoidance area by opening the edge of the shell-shaped dental aligner near the gum to achieve the desired effect. This not only damages the integrity of the shell-shaped dental aligner, but also reduces the aligning force of the shell-shaped dental aligner on the teeth, thereby affecting the realization of the desired treatment effect. It also limits the setting position of the traction, such as if the traction needs to be set near the occlusal surface according to the treatment needs, the opening of the gum needs to extend to the occlusal surface, which undoubtedly further damages the integrity of the shell-shaped dental aligner, is not conducive to the realization of the treatment effect, and even easily causes the shell-shaped dental aligner to break, resulting in treatment failure. SUMMARY

[0004] The utility model solves the technical problem of overcoming the defects of prior art and provides a dental instrument, wherein the dental instrument comprises a traction assembly acting directly on teeth to generate a first correction force and a shell-shaped dental appliance interacting with the traction assembly to generate a second correction force on the teeth, when the dental instrument is used, the teeth can obtain a composite correction force formed by the first correction force and the second correction force, thereby improving the flexibility of the dental instrument in providing correction force to the teeth.

[0005] In order to achieve the above object, the utility model adopts the technical scheme as follows:

[0006] A dental instrument comprises a shell-shaped dental appliance and a traction assembly, the traction assembly comprises a mounting base and a traction accessory, the mounting base is used for being fixed on the labial side surface or the lingual side surface of the teeth of a patient, the traction accessory comprises a traction part, a connecting part and a first mounting part which are sequentially connected, the mounting base comprises a second mounting part, and the traction accessory is fixedly connected with the mounting base in a detachable mode through cooperation of the first mounting part and the second mounting part.

[0007] The shell-shaped dental appliance comprises a plurality of cavities for accommodating the teeth of a patient and a receiving cavity for accommodating the mounting base; the receiving cavity comprises a through hole penetrating the inside and the outside of the receiving cavity, and the first mounting part is matched with the second mounting part after passing through the through hole, or the second mounting part is matched with the first mounting part after passing through the through hole, so that the traction accessory is mounted on the mounting base and the traction part is located outside the receiving cavity.

[0008] When the shell-shaped dental appliance is worn on the teeth of a patient, the receiving cavity at least partially contacts the mounting base to generate a first correction force; the traction part is used for hooking a traction member to apply a second correction force to the corresponding teeth of the mounting base.

[0009] Preferably, the outer surface of the mounting base has at least a force receiving surface, the inner surface of the receiving cavity has a force applying surface corresponding to the position of the force receiving surface, and when worn, the force applying surface contacts the force receiving surface.

[0010] Preferably, the geometric shape of the receiving cavity matches the geometric shape of the mounting base, and when worn, at least part of the inner surface of the receiving cavity is fitted with the outer surface of the mounting base.

[0011] Preferably, the contour of the lower end surface of the mounting base adjacent to the side of the gum line extending towards the side of the occlusal surface is a smooth transition guide part, so as to guide the shell-shaped dental appliance to be taken off and worn.

[0012] Preferably, the accommodating cavity is arranged on the surface of the cavity of the tooth where the mounting base is located at a first preset distance from the occlusal surface without occlusal interference with the opposite tooth.

[0013] Preferably, the first preset distance is 2-3 mm.

[0014] Preferably, the protruding height dimension of the mounting base protruding towards the distal tooth of the patient's tooth is 1-3 mm.

[0015] Preferably, the mounting base is arranged in a spherical crown shape, and the height dimension of the spherical crown shape is 1-3 mm.

[0016] Preferably, the mounting base comprises a mounting bottom surface adjacent to one side of the patient's tooth, and the contour shape of the mounting bottom surface matches the contour shape of the surface of the tooth.

[0017] Preferably, the mounting bottom surface is protrudingly arranged with a plurality of protruding structures on the side facing the patient's tooth for increasing the retention force of the mounting bottom surface and the tooth surface.

[0018] Preferably, the first mounting portion comprises a clamping portion, the second mounting portion comprises a guide channel and a first accommodating cavity connected with the guide channel, the clamping portion is elastically compressed when passing through the guide channel, and the clamping portion restores its original shape after entering the first accommodating cavity and is constrained in the first accommodating cavity in a pull-out manner in the insertion and extraction direction; or, the second mounting portion comprises a clamping portion, the first mounting portion comprises a guide channel and a first accommodating cavity connected with the guide channel, the clamping portion is elastically compressed when passing through the guide channel, and the clamping portion restores its original shape after entering the first accommodating cavity and is constrained in the first accommodating cavity in a pull-out manner; wherein, the insertion and extraction direction is arranged at a first preset angle with the direction of the second correction force.

[0019] Preferably, the clamping portion comprises a first guide portion, a second guide portion and a buffer slot, the first guide portion is arranged adjacent to the free end of the clamping portion, and the second guide portion is arranged adjacent to the first guide portion; the buffer slot spans the clamping portion to divide the clamping portion into two parts, thereby providing a buffer space for the elastic deformation of the clamping portion when being compressed during insertion or extraction of the guide channel.

[0020] Preferably, the second mounting portion is disposed at a second preset distance from the mounting bottom surface, and comprises a mounting passage and a limiting portion; the first mounting portion passes through the mounting passage from a first position and is accommodated between the second mounting portion and the mounting bottom surface; when the first mounting portion is rotated, the first mounting portion is rotated from the first position to a second position, and cooperates with the limiting portion at the second position to limit the first mounting portion from being separated from the mounting base, wherein the first position and the second position are disposed at a second preset angle, and the second preset angle is greater than 0° and less than or equal to 90°.

[0021] Preferably, when the first mounting portion is located at the second position, a characteristic length dimension of the first mounting portion is greater than a characteristic width dimension of the mounting passage.

[0022] Preferably, the towing accessory further comprises a blocking portion, which is annularly disposed at a position close to the first mounting portion of the connecting portion; an outer contour dimension of the blocking portion is greater than or equal to a dimension of the through hole; when the towing accessory is mounted on the mounting base, the blocking portion covers an outer side wall on a side of the accommodation cavity on which the through hole is located; a contour shape of a blocking surface of the blocking portion close to one side of the accommodation cavity matches a contour shape of the outer side wall of the accommodation cavity covered thereby.

[0023] Preferably, the towing accessory is provided with a plurality of towing portions which are spaced apart in a long axis direction of the towing accessory.

[0024] Compared with the prior art, the above technical scheme has at least one of the following beneficial effects:

[0025] (1) The dental instrument provided by the utility model, firstly, according to the installation base required by the treatment, the second installation part of the installation traction accessory is arranged on the installation base, and the through hole is arranged on the surface of the accommodating cavity corresponding to the second installation base, and the size of the through hole only needs to allow the first installation part or the second installation part to pass, so that the opening of the shell-shaped dental appliance gum end is not needed even if the position of the near bite surface is set, thereby the damage degree of the shell-shaped dental appliance can be reduced. Secondly, according to the installation base required by the treatment, the second installation part is arranged on the installation base to be detachably installed with the traction accessory. On the one hand, when the traction accessory is installed on the installation base, the traction member is hooked, the traction accessory can directly apply force to the installation base, and after wearing, the installation base and the shell-shaped dental appliance interact to generate a first treatment force, and the traction assembly can generate a second treatment force on the teeth. When the dental instrument is used, the teeth can obtain a composite treatment force formed by the first treatment force and the second treatment force, thereby improving the flexibility of the dental instrument in providing treatment force to the teeth, improving the treatment effect and shortening the treatment period. On the other hand, when wearing the dental instrument, the shell-shaped dental appliance can be worn first, and then the traction accessory can be installed. When the dental instrument is taken off, the traction accessory can be removed first, and then the shell-shaped dental appliance can be taken off, which is convenient to wear and take off. Moreover, the installation of the traction accessory in the application does not need to be opened at the gum end of the shell-shaped dental appliance, but a through hole is arranged on the accommodating cavity, and the size of the through hole only needs to allow the first installation part or the second installation part to pass, so that the opening of the shell-shaped dental appliance gum end is not needed even if the position of the near bite surface is set, thereby reducing the damage to the shell-shaped dental appliance.

[0026] (2) The dental instrument provided by the utility model can be stably installed when the first installation part and the second installation part are installed and matched, and can be easily and conveniently removed when disassembled, so as to realize the detachable installation of the traction accessory and the installation base, and the traction accessory can be replaced according to the treatment needs.

[0027] (3) The dental instrument provided by the utility model can further set a barrier on the traction accessory, which can block the inside and outside of the accommodating cavity to avoid the entry of oral dirt into the accommodating cavity and cause a hidden danger of hygiene, and further limit the movement of the first installation part in the second accommodating cavity to increase the installation firmness of the traction accessory. BRIEF DESCRIPTION OF DRAWINGS

[0028] One or more embodiments are illustrated by way of example in the figures that are part of this disclosure and which are illustrative, but not limiting of the embodiments and similar elements of the embodiments have similar designations. The figures of the accompanying drawings do not constitute a limitation of proportionality.

[0029] Figure 1 It is a structure schematic view of dental instrument in the embodiment one of the utility model;

[0030] Figure 2 It is Figure 1 It is a partial close-up view of area A in the embodiment one of the utility model;

[0031] Figure 3 It is a sectional structure schematic view of traction assembly in the embodiment one of the utility model;

[0032] Figure 4 It is a sectional structure schematic view of accommodating cavity in the embodiment one of the utility model;

[0033] Figure 5 It is a structure schematic view of a first mounting portion and a second mounting portion in the embodiment one of the utility model;

[0034] Figure 6 It is a sectional structure schematic view of traction assembly provided with barrier portion in the embodiment one of the utility model;

[0035] Figure 7 It is a structure schematic view of the installation bottom surface of installation base provided with protruding structure in the embodiment one of the utility model;

[0036] Figure 8 It is a structure schematic view of a first mounting portion and a second mounting portion in the embodiment one of the utility model;

[0037] Figure 9 It is a structure schematic view of installation base in the embodiment one of the utility model;

[0038] Figure 10 It is a sectional structure schematic view of another installation base in the embodiment one of the utility model;

[0039] Figure 11 It is a structure schematic view of traction accessory provided with two traction portions in the embodiment one of the utility model;

[0040] Figure 12 It is a sectional structure schematic view of a first mounting portion and a second mounting portion in the embodiment two of the utility model;

[0041] Figure 13 It is a structure schematic view of a first mounting portion and a second mounting portion in the embodiment two of the utility model;

[0042] Figure 14 It is a structure schematic view of another first mounting portion and second mounting portion in the embodiment two of the utility model;

[0043] Figure 15The utility model discloses a cross section structure schematic diagram of a traction accessory provided with a barrier part in the second embodiment of the utility model.

[0044] Figure 16 The utility model discloses a cross section structure schematic diagram of another traction accessory provided with a barrier part in the second embodiment of the utility model. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the various embodiments of the utility model 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 utility model, many technical details are proposed in order to make the readers better understand the utility model. However, even if there is no such technical detail and various changes and modifications based on the following embodiments, the technical scheme claimed by the utility model can be realized. 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 utility model.

[0046] 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 description herein 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.

[0047] The "posterior tooth area" mentioned in the various embodiments of the utility model 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.

[0048] The following will be specifically described with reference to the drawings.

[0049] Example One

[0050] Please refer to Figures 1 to 4As shown, the dental appliance 100 of the present application comprises a shell-shaped dental appliance 1 and a traction assembly 2. The traction assembly 2 comprises a mounting base 21 fixed on the labial or lingual surface of the patient's teeth 200, and a traction accessory 22. In the present embodiment, the mounting base 21 is fixed on the buccal surface of the patient's posterior teeth 200. The traction accessory 22 comprises a traction portion 23, a connecting portion 24 and a first mounting portion 25 connected in sequence. Specifically, the traction portion 23 can be in the shape of a mushroom head as shown in the present embodiment, or can be in the shape of a question mark or L according to requirements. The connecting portion 24 connects the traction portion 23 and the first mounting portion 25, and forms a recessed space for hooking a traction member. The mounting base 21 comprises a second mounting portion 26 adjacent to one side of the patient's teeth. The traction accessory 22 is fixedly connected with the mounting base 21 through cooperation of the first mounting portion 25 and the second mounting portion 26 in a detachable manner. In this way, the traction accessory 22 can be detachably installed or removed according to requirements of treatment.

[0051] The shell-shaped dental appliance 1 comprises a plurality of cavities 11 for accommodating the teeth 200 of the patient, and a receiving cavity 12 for accommodating the mounting base 21; the receiving cavity 12 comprises a through hole 13 extending through the inside and outside of the receiving cavity 12, so that the first mounting part 25 can pass through the through hole 13 into the receiving cavity 12 and cooperate with the second mounting part 26, or the second mounting part 26 can pass out of the through hole 13 and cooperate with the first mounting part 25, so as to finally mount the traction accessory 22 on the mounting base 21, and after the mounting is completed, the traction part 23 is located outside the receiving cavity 12. When the shell-shaped dental appliance 1 is worn on the teeth of the patient, the receiving cavity 12 at least partially contacts the mounting base 21 to generate a first correction force, specifically, the mounting base 21 can contact one face or two faces or all faces of the receiving cavity 12, or the mounting base 21 contacts part of the surface of the several faces of the receiving cavity 12, wherein the mounting base 21 can increase the retention force between the shell-shaped dental appliance 1 and the teeth of the patient, or through the design of the shape, size and setting position of the mounting base 21, the mounting base 21 can provide a correction force (such as translation, rotation, depression, elongation, etc.) that can assist the shell-shaped dental appliance 1 to move the teeth under the contact and cooperation of the shell-shaped dental appliance 1; it is further explained that the traction part 23 is arranged on the buccal side of the posterior teeth 200 of the patient, for hooking a traction member and applying a second correction force to the corresponding teeth 200 of the mounting base 21; the second correction force generated in this way can directly act on the teeth of the patient, which is beneficial to the movement of the teeth. It should be noted that in this application, the mounting position of the mounting base 21 is set based on the correction needs, and the installation of the traction accessory 22 does not need to be set at the gum end opening of the shell-shaped dental appliance 1, but only needs to be set on the receiving cavity 12 to form a through hole 13, and the size of the through hole 13 only needs to allow the first mounting part or the second mounting part to pass through, that is, even if it is set at the position of the proximal surface, it does not need to be opened from the gum end of the shell-shaped dental appliance 1, thereby reducing the damage to the shell-shaped dental appliance 1; such a structure design not only can flexibly bond the traction assembly 2 on the surface of the teeth, but also can reduce the damage degree to the shell-shaped dental appliance 1.

[0052] With the above structure, when the traction accessory 22 is installed on the installation base 21, the traction accessory 22 can directly apply force to the installation base 21. When the dental appliance 100 is worn, the shell-shaped dental appliance 1 and the installation base 21 interact to produce a tooth correction effect, and the traction accessory 22 and other traction devices (such as an implant pin or another traction accessory) interact to produce a synergistic correction effect, thereby improving the correction effect and shortening the correction period. On the other hand, when the dental appliance 100 is worn, the shell-shaped dental appliance 1 can be worn first, and then the traction accessory 22 is installed. When the dental appliance 100 is removed, the traction accessory 22 can be removed first, and then the shell-shaped dental appliance 1 is removed, which is convenient to wear and remove.

[0053] Further, while the installation base 21 and the shell-shaped dental appliance 1 interact to produce a first correction force, the traction assembly 2 directly acts on the teeth to produce a second correction force. When the dental appliance 100 is worn, the teeth can obtain a combined correction force formed by the first correction force and the second correction force. In practice, by changing the size or direction of the second correction force of the traction assembly 2, the combined correction force size or direction produced by the first correction force and the second correction force can be adjusted, and ultimately the possibility and flexibility of the dental appliance 100 to provide different correction forces to the teeth can be improved.

[0054] Further, at least one surface of the outer surface of the installation base 21 is a force receiving surface, and the inner surface of the receiving cavity 12 has a force applying surface corresponding to the force receiving surface. When the shell-shaped dental appliance 1 is worn, the force applying surface contacts the force receiving surface to apply force to the force receiving surface, thereby transmitting force to the tooth on which the installation base 21 is located through the installation base 21 to assist the movement of the tooth. The specific contact mode between the force applying surface and the force receiving surface can be that the entire surface of the force receiving surface contacts the entire surface of the force applying surface, or that part of the force receiving surface contacts part of the force applying surface, or that a plurality of protrusions or protrusions are arranged on the surface of the force receiving surface to contact and bear force on the force applying surface, which are specific implementation forms of the present application.

[0055] Further, please refer to Figure 3, the geometric shape of the accommodation cavity 12 matches the geometric shape of the mounting base 21, specifically, here, at least in shape, the inner profile geometric shape of the accommodation cavity 12 is consistent with the outer profile geometric shape of the part of the mounting base 21 wrapped by the accommodation cavity 12, while the outer profile geometric shape of the accommodation cavity 12 can be consistent with the outer profile geometric shape of the part of the mounting base 21 wrapped by the accommodation cavity 12, and the outer profile edge of the accommodation cavity 12 can be rounded, as shown in Figure 4 Thus, the rounding can avoid scratching the patient's oral cavity by the accommodation cavity 12, and improve comfort and safety. The matching of the present application can be consistent in shape and size, and after wearing, the entire inner surface of the accommodation cavity 12 and the entire outer surface of the mounting base 21 are mutually fitted to form a good wrapping force; the matching of the present application can also be consistent in shape but inconsistent in size, and when the shape is consistent but the size is inconsistent, the inner profile size of the accommodation cavity 12 and the outer profile size of the mounting base 21 must satisfy: after wearing, part of the inner surface of the accommodation cavity 12 and part of the outer surface of the mounting base 21 are fitted to enable the accommodation cavity 12 to apply force to the mounting base 21.

[0056] Further explanation, please continue to refer to Figure 4As shown, in order to not interfere with the occlusion of the opposite teeth after wearing, the accommodation cavity 12 is arranged on the surface of the cavity 11 of the tooth on which the mounting base 21 is arranged at a first preset distance H1 from the occlusal surface of the tooth on which the mounting base 21 is arranged, and the first preset distance H1 is the distance from the occlusal surface of the tooth on which the mounting base 21 is arranged in the gingival direction. It should be noted that the accommodation cavity 12 of the present application is not limited to the posterior teeth region, and when the accommodation cavity 12 is located in the anterior teeth region, the first preset distance H1 is the distance from the incisal edge of the tooth on which the mounting base 21 is arranged in the gingival direction. As described above, the arrangement position, shape and size of the accommodation cavity 12 of the shell-shaped dental appliance 1 are related to the mounting base 21 accommodated therein, and generally, a digital dental arch model with a corresponding mounting base is designed by a medical designer according to the treatment needs, and a 3D physical dental arch model is made based on the digital dental arch model, and then a shell-shaped dental appliance containing the accommodation cavity 12 is made by a hot-pressing film forming process. The mounting position and shape of the mounting base are determined according to the actual treatment needs, for example, the mounting base 21 can be arranged as a lowering accessory for lowering the anterior teeth, or a rotating accessory for assisting tooth rotation, or a retaining accessory for fixing the shell-shaped dental appliance 1 on the teeth to avoid dislocation, etc. Specifically, when the first preset distance H1 is between 2mm and 3mm, the occlusion of the opposite teeth can not be interfered with, and the limited surface space of the teeth can be fully utilized, and further, in some embodiments, the accommodation cavity 12 can be arranged at a position 2mm, 2.5mm or 3mm away from the occlusal surface of the tooth on which the mounting base 21 is arranged.

[0057] Further description of the cooperation structure of the first mounting portion 25 and the second mounting portion 26 will be given, please refer to Figures 5 to 7As shown, the first mounting part 25 comprises a clamping part 4, the second mounting part 26 comprises a guide channel 5 and a first accommodating cavity 6 connected with the guide channel 5, the clamping part 4 is elastically compressed when passing through the guide channel 5, and the clamping part 4 restores its original shape after entering the first accommodating cavity 6 and is constrained in the first accommodating cavity 6 in a pull-out manner in the plug-in direction; wherein the plug-in direction is arranged at a first preset angle with the direction of the second correction force. Such a structure design can make the clamping part 4 inserted into and accommodated in the first accommodating cavity 6 in the insertion direction X, and the free end of the clamping part 4 abuts against the bottom side wall of the first accommodating cavity 6; in the pull-out direction (i.e. the direction opposite to the insertion direction X), the clamping part 4 can be limited in the insertion direction X and the pull-out direction without external force, so as not to fall easily, so that the installation of the first mounting part 25 and the second mounting part 26 is more reliable. When disassembling, only need to pull out along the pull-out direction, so as to conveniently pull out the first mounting part 25 and the second mounting part 26, the whole installation and disassembly process is simple and fast, and the traction accessory 22 can be replaced in time according to the correction needs.

[0058] Further, as shown in the embodiment, the traction member 300 is hooked on the traction accessory 22 and is pulled in the Y direction to apply the second correction force to the tooth corresponding to the mounting base 21, and the plug-in direction is different from the direction Y of the second correction force and is arranged at a near 90° angle. Figure 7

[0059] Further, the clamping part 4 comprises a first guide part 41, a second guide part 42 and a buffer groove 43, the first guide part 41 is arranged adjacent to the free end of the clamping part 4, and the second guide part 42 is arranged adjacent to the first guide part 41; the buffer groove 43 divides the clamping part 4 into two parts to provide a buffer space for the elastic deformation of the clamping part 4 when being compressed for insertion or pull-out of the guide channel 5. Specifically, the first guide part 41 comprises two guide surfaces arranged at an angle for guiding the clamping part 4 to insert and pull out the guide channel 5, and one end of the buffer groove 43 away from the free end of the clamping part 4 is open. Such a structure design can make the clamping part 4 smoothly enter the guide channel 5 and then enter and pull out the first accommodating cavity 6 under the guidance of the two guide surfaces, and can make the clamping part 4 stably limited in the first accommodating cavity 6 so as not to fall easily without external force.

[0060] In another embodiment, the detachable installation can also be realized by the following structure, please refer to Figure 8 ​As shown, the second mounting portion 26 is provided with a clamping portion 4' at one end away from the tooth surface, the first mounting portion 25 comprises a guide channel 5' and a first accommodating cavity 6' connected with the guide channel 5', the clamping portion 4' is elastically compressed when passing through the guide channel 5', and the clamping portion 4' restores its original shape and is constrained in the first accommodating cavity 6' in a pull-out manner after entering the first accommodating cavity 6'; wherein the insertion and extraction direction is arranged at a first preset angle with the direction of the second correction force. Wherein the specific structure, cooperation relationship and effective effect of the clamping portion 4', the guide channel 5' and the first accommodating cavity 6' are the same as the above-mentioned first embodiment, which will not be repeated here.

[0061] Further description of the mounting base 21, please continue to see Figures 5 to 8 As shown, the mounting base 21 comprises a mounting bottom surface S2 adjacent to the side of the patient's teeth, and the mounting base 21 is fixed to the labial or lingual surface of the patient's teeth through the mounting bottom surface S2, for example, through adhesive bonding, preferably, the contour shape of the mounting bottom surface S2 matches the contour shape of the tooth surface S1, for example, an arc surface consistent with the contour shape of the tooth surface to be bonded, so that the bonding is more reliable; of course, in some embodiments, the mounting bottom surface S2 of the mounting base 21 can also be a plane, which is bonded to the surface of the patient's teeth through the plane.

[0062] Further, the traction accessory 22 is also provided with a blocking portion 28, please see Figure 6As shown, the blocking portion 28 is circumferentially arranged at a position close to the first mounting portion 25 of the connecting portion 24, and the outer contour size D1 of the blocking portion 28 is greater than or equal to the size D2 of the through hole 13. Specifically, the difference between the outer contour size D1 of the blocking portion 28 and the size D2 of the through hole 13 can be 0-2 mm, i.e., the sizes of the two can be equal. In this case, when the traction accessory 22 is mounted on the mounting base 21, the blocking portion 28 can exactly fill the through hole 13, blocking the inside and outside of the accommodation cavity 12, so as to avoid the entry of oral contaminants into the accommodation cavity 12 to cause a sanitation hazard. In another embodiment, the difference between the outer contour size D1 of the blocking portion 28 and the size D2 of the through hole 13 can be 1 mm or 2 mm. When the traction accessory 22 is mounted on the mounting base 21, the blocking portion 28 can completely cover the through hole 13, so that the accommodation cavity 12 covers the outside wall of the accommodation cavity 12 on the side where the through hole 13 is located, which can better block the inside and outside of the accommodation cavity 12, so as to avoid the entry of oral contaminants into the accommodation cavity 12 to cause a sanitation hazard, and can further limit the movement of the first mounting portion 25 in the second accommodation cavity 9, thereby increasing the mounting firmness of the traction accessory 22. Further, the profile shape of the blocking surface of the blocking portion 28 close to the side of the accommodation cavity 12 can match the profile shape of the outside wall of the accommodation cavity 12 covered thereby. Such matching structure design makes the two more closely fitted, and the blocking effect is better.

[0063] Further, the mounting bottom surface S2 is convexly arranged on the side facing the tooth of the patient with a plurality of protruding structures 27 for increasing the retention force of the mounting bottom surface S2 and the tooth surface (as shown in Figure 7 The protruding structures 27 are arranged to increase the surface area of the adhesive bonding, which helps to increase the retention force of the mounting bottom surface S2 and the tooth of the patient after bonding, so that the mounting base 21 can be firmly fixed to the tooth surface. When the traction accessory 22 is arranged on the mounting base 21, the traction accessory 22 can be hooked with a traction member 300, such as an elastic rubber ring or the like, so as to increase the force of the mounting base 21 on the tooth. The force with which the mounting base 21 interacts with the shell-shaped dental appliance 1 and the traction force generated by the traction accessory 22 jointly guide the tooth to gradually change from the initial position to the target correction position.

[0064] Further description, please refer to Figure 9 and Figure 10As shown, the shape of the mounting base 21 can be set according to specific orthodontic needs, for example, it can be a column structure (cylinder, cube, cuboid, etc.) or a spherical cap shape, but considering that the protruding height h of the mounting base 21 in the distal direction is too high, it will increase the difficulty of demolding of the mounting base 21 and interfere in the oral cavity, etc., wherein the protruding height h is the height of the mounting base 21 in the short axis direction, and in combination with the drawings, the protruding height h is the height of the mounting base 21 protruding from the tooth 200 in the distal direction, and the protruding height h of the mounting base 21 needs to be selected within a suitable range, when the protruding height h is within the range of 1mm-3mm, it can effectively generate significant auxiliary orthodontic force, and does not affect the demolding process.

[0065] Further, in an embodiment, the inventors set the mounting base 21 to a spherical cap structure within the protruding height range in order to improve the comfort of the patient, and the height of the spherical cap is 1mm-3mm; such a spherical cap structure setting reduces the foreign body sensation of the mounting base 21 and makes it more comfortable, and the spherical cap structure makes the demolding process more smooth; further, the mounting base 21 can also be set to an ellipsoidal cap shape, so that the edge of the mounting base 21 is more gentle and the comfort is stronger.

[0066] Further explanation, in order to facilitate demolding, the contour of the lower end of the mounting base 21 adjacent to the gum line side extending to the occlusal surface side is a smooth transition guide 3, which can be a smooth transition inclined curved surface, to guide the shell-shaped dental appliance 1 to be put on and taken off. Such a structure of the guide 3 makes it easier to put on and take off the shell-shaped dental appliance 1 cooperating with the mounting base 21.

[0067] Further explanation, please see Figure 11 As shown, the traction accessory 22 is provided with a plurality of traction parts (23, 23') spaced apart along the long axis direction thereof; the shapes of the plurality of traction parts (23, 23') can be different, wherein any traction part 23 or 23' can cooperate with the connecting part 24 to form a recessed space capable of hooking a traction member, forming traction accessories of different lengths in the long axis Z direction to meet different traction needs.

[0068] Example Two

[0069] To achieve the purpose of the present application, the present application also provides a different structure of the first mounting part and the second mounting part and a detachable mounting method, and the difference between the present embodiment and embodiment one is that the structure and the detachable mounting method of the first mounting part and the second mounting part are different, and the other technical features and embodiment one are the same, which will not be repeated here.

[0070] Please refer toFigures 12 to 14 As shown, the second mounting portion 26 is arranged at a second preset distance H2 from the mounting bottom surface S2, and specifically, the second mounting portion 26 comprises a mounting passage 7 and a limiting portion 8, wherein the mounting passage 7 can allow the first mounting portion 25 to pass therethrough when the first mounting portion 25 is at a first position, for example, the inner contour shape of the mounting passage 7 is consistent with the outer contour shape of the first mounting portion 25, and the size is greater than the outer contour size of the first mounting portion 25, and the first mounting portion 25 can be arranged in a long strip shape, for example, a cuboid structure, when the first mounting portion 25 passes through the mounting passage 7 from the first position and is accommodated in a second accommodation cavity 9 between the second mounting portion 26 and the mounting bottom surface S2, the first mounting portion 25 is rotated from the first position to a second position, and cooperates with the limiting portion 8 at the second position; it should be noted that the first position herein is a position where the long axis L of the first mounting portion 25 and the long axis W1 of the mounting passage 7 are projected on the same plane and coincide with each other; the second position is a position where the long axis L of the first mounting portion 25 and another W2 axis of the mounting passage 7 different from the long axis W1 thereof are projected on the same plane and coincide with each other, and Figure 13 In the example shown, the W2 axis is the short axis of the mounting passage 7. Specifically, the upper surface of the first mounting portion 25 abuts against the lower surface of the limiting portion 8 to limit the first mounting portion 25 from being separated from the second accommodation cavity 9 in a pulling-out direction, and further, the lower surface of the first mounting portion 25 can also abut against the inner side surface of the mounting bottom surface S2 of the mounting base 21 to limit the first mounting portion 25 from further moving in an insertion direction, so that the upper surface and the lower surface of the first mounting portion 25 are limited in the pulling-out direction and the insertion direction, respectively, and finally the traction accessory 22 can be firmly mounted on the mounting base 21. Further, in the second position, in order to further limit the rotation of the first mounting portion 25 in the second accommodation cavity 9, a matching structure 10 (as shown in Figure 12 When the first mounting portion 25 is rotated to the second position, the matching structure is matched in concave-convex matching, further limiting the rotation of the first mounting portion 25, so that the traction accessory can be stably mounted on the mounting base without external force. Preferably, the matching structure 10 is arranged at the end position of the second position, so that in the process of rotating from the first position to the second position, the first mounting portion 25 is not interfered by the matching structure 10, and when reaching the second position, the matching structure 10 is matched to limit the movement of the first mounting portion 25, so that the first mounting portion 25 is stably arranged at the second position.

[0071] Further, the first position of the embodiment is explained in combination with Figure 13 and Figure 14 The first position refers to the position of the first mounting portion 25 when the long axis L of the first mounting portion 25 is in the same direction as the first position and the first mounting portion 25 can pass through the mounting passage 7. After rotation, the first position and the second position are different, and the second preset angle β is greater than 0° and less than or equal to 90°, for example, as shown in Figure 13 , the second preset angle β is set to a right angle (90°), and as shown in Figure 14 , the second preset angle β is set to an acute angle.

[0072] Further, when the first mounting portion 25 is located at the second position, the characteristic length dimension L1 of the first mounting portion 25 is greater than the characteristic width dimension L2 of the mounting passage 7. The characteristic length dimension L1 of the first mounting portion 25 is the length dimension of the first mounting portion 25 along the long axis L, and the characteristic width dimension L2 of the mounting passage 7 is the width dimension of the mounting passage 7 when the edge of the mounting passage 7 can hold the first mounting portion 25. As shown in Figure 13 , when the second preset angle β is set to a right angle, the characteristic width dimension L2 of the mounting passage 7 is the width dimension of the mounting passage 7 along the short axis direction; and as shown in Figure 14 , when the second preset angle β is set to a right angle, the characteristic width dimension L2 of the mounting passage 7 is the dimension of the edge of the mounting passage 7 in the direction of the second position when the first mounting portion 25 is held by the edge of the mounting passage 7 after being rotated to the second position.

[0073] Further, the contour shape of the lower surface of the first mounting portion 25 can be set to be consistent with the inner side surface of the mounting bottom surface of the mounting base 21. This structure design allows the lower surface of the first mounting portion 25 to closely match the inner side surface of the mounting bottom surface, so that the limiting is more reliable. Preferably, the inner contour shape of the second accommodating cavity 9 satisfies that when the first mounting portion 25 is located at the second position, the two ends of the first mounting portion 25 along the long axis direction can abut against the inner side surface of the second accommodating cavity 9 to further limit the first mounting portion 25.

[0074] Further, please refer to Figure 15 and Figure 16As shown, in the embodiment, the traction accessory 22 can also be provided with a blocking portion 28, which is circumferentially arranged at a position close to the first mounting portion 25 of the connecting portion 24, and the outer contour size D1 of the blocking portion 28 is greater than or equal to the size D2 of the through hole 13, specifically, the difference between the outer contour size D1 of the blocking portion 28 and the size D2 of the through hole 13 can be 0-2 mm, that is, the sizes of the two can be equal, at this time, when the traction accessory 22 is mounted with the mounting base 21, the blocking portion 28 can just fill the through hole 13, block the inside and outside of the accommodation cavity 12, and avoid oral contamination into the accommodation cavity 12 to cause a sanitation hazard; in another embodiment, the difference between the outer contour size D1 of the blocking portion 28 and the size D2 of the through hole 13 can be 1 mm or 2 mm, when the traction accessory 22 is mounted with the mounting base 21, the blocking portion 28 can completely cover the through hole 13, so that the accommodation cavity 12 covers the outside wall of the accommodation cavity 12 on the side of the through hole 13, which can better block the inside and outside of the accommodation cavity 12, avoid oral contamination into the accommodation cavity 12 to cause a sanitation hazard, and further limit the movement of the first mounting portion 25 in the second accommodation cavity 9, and increase the mounting firmness of the traction accessory 22. Further, the contour shape of the blocking surface of the blocking portion 28 close to the side of the accommodation cavity 12 can match the contour shape of the outside wall of the accommodation cavity 12 covered thereby; such matching structure design makes the two more fit, and the blocking effect is better.

[0075] It should be noted that the above embodiments can be freely combined as needed to form different new embodiments without contradiction, 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.

[0076] The above is only the preferred embodiment of the present application, and it should be noted 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.

[0077] 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 by 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 instrument, characterized in that, The shell-shaped dental appliance comprises a shell-shaped dental appliance and a traction assembly, The traction assembly comprises a mounting base and a traction accessory, the mounting base is used for being fixed on the labial or lingual surface of the patient's teeth, the traction accessory comprises a traction part, a connecting part and a first mounting part which are sequentially connected, the mounting base comprises a second mounting part, and the traction accessory is fixedly connected with the mounting base in a detachable manner through cooperation of the first mounting part and the second mounting part. The shell-shaped dental appliance comprises a plurality of cavities for accommodating the patient's teeth and a receiving cavity for accommodating the mounting base, the receiving cavity comprises a through hole penetrating the inside and outside of the receiving cavity, and the first mounting part is cooperated with the second mounting part after passing through the through hole, or the second mounting part is cooperated with the first mounting part after passing through the through hole, so that the traction accessory is mounted on the mounting base and the traction part is located outside the receiving cavity. When the shell-shaped dental appliance is worn on the patient's teeth, the receiving cavity at least partially contacts the mounting base to generate a first correction force, and the traction part is used for hooking a traction member to exert a second correction force on the corresponding tooth of the mounting base.

2. The dental instrument of claim 1, wherein, The outer surface of the mounting base has at least one stress surface, the inner surface of the receiving cavity has a force surface corresponding to the position of the stress surface, and the force surface contacts the stress surface when worn.

3. The dental instrument of claim 2, wherein, The geometric shape of the receiving cavity matches the geometric shape of the mounting base, and at least part of the inner surface of the receiving cavity is fitted with the outer surface of the mounting base when worn.

4. The dental instrument of claim 1, wherein, The contour of the lower end of the mounting base adjacent to the side of the gum line extending towards the occlusal surface is a smooth transition guide part to guide the shell-shaped dental appliance to be taken off and worn.

5. The dental instrument of claim 1, wherein, The receiving cavity is arranged on the surface of the cavity of the tooth accommodating the mounting base at a first preset distance which does not interfere with the occlusion of the opposite tooth, and the first preset distance is the distance from the occlusal surface to the gum in the upper direction of the receiving cavity near the occlusal surface.

6. The dental instrument of claim 5, wherein, The first preset distance is 2mm-3mm.

7. The dental instrument of claim 1, wherein, The protruding height of the mounting base protruding towards the distal tooth of the patient's teeth is 1mm-3mm.

8. The dental instrument of claim 1, wherein, The mounting base is arranged in a spherical crown shape, and the height of the spherical crown shape is 1mm-3mm.

9. The dental instrument of claim 1, wherein, The mounting base comprises a mounting bottom surface adjacent to one side of the patient's teeth, and the contour shape of the mounting bottom surface matches the surface contour shape of the tooth.

10. The dental instrument of claim 9, wherein, The mounting bottom surface protrudes towards the side of the patient's teeth and is provided with a plurality of protruding structures for increasing the retention force of the mounting bottom surface and the tooth surface.

11. Dental instrument according to claim 9 or 10, characterized in that The first mounting part comprises a clamping part, and the second mounting part comprises a guide channel and a first accommodating cavity connected with the guide channel. The clamping part is elastically compressed when passing through the guide channel, and the clamping part restores its original shape after entering the first accommodating cavity and is constrained in the first accommodating cavity in a pull-out manner in the plug-in direction. Alternatively, the second mounting part comprises a clamping part, and the first mounting part comprises a guide channel and a first accommodating cavity connected with the guide channel. The clamping part is elastically compressed when passing through the guide channel, and the clamping part restores its original shape after entering the first accommodating cavity and is constrained in the first accommodating cavity in a pull-out manner. The plug-in direction is arranged at a first preset angle with the direction of the second correction force.

12. The dental instrument of claim 11, wherein, The clamping part comprises a first guide part, a second guide part and a slow-release groove. The first guide part is arranged adjacent to the free end of the clamping part, and the second guide part is arranged adjacent to the first guide part. The slow-release groove spans the clamping part to divide the clamping part into two parts, thereby providing a slow-release space for the elastic deformation of the clamping part when being compressed during insertion or extraction of the guide channel.

13. The dental instrument of claim 9 or 10, wherein, The second mounting part is arranged at a second preset distance from the mounting bottom surface, and comprises a mounting channel and a limiting part. The first mounting part passes through the mounting channel from a first position and is accommodated between the second mounting part and the mounting bottom surface. When the first mounting part is rotated, the first mounting part is rotated from the first position to a second position, and cooperates with the limiting part at the second position to limit the first mounting part from being separated from the mounting base. The first position and the second position are arranged at a second preset angle, and the second preset angle is greater than 0° and less than or equal to 90°.

14. The dental instrument of claim 13, wherein, When the first mounting part is located at the second position, the characteristic length dimension of the first mounting part is greater than the characteristic width dimension of the mounting channel.

15. The dental instrument of claim 1, wherein, The traction accessory further comprises a barrier part arranged around the connecting part near the first mounting part. The barrier part has an outer contour dimension greater than or equal to the size of the through hole. When the traction accessory is mounted on the mounting base, the barrier part covers the outer side wall on the side of the accommodation cavity where the through hole is located. The contour shape of the barrier surface near the side of the accommodation cavity matches the contour shape of the outer side wall of the accommodation cavity.

16. The dental instrument of claim 1, wherein, The traction accessory is provided with a plurality of traction parts spaced apart along the long axis direction.

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