Shell-shaped dental instrument

Abstract

The utility model provides a shell-shaped dental instrument which comprises a shell-shaped body provided with a cavity used for containing teeth, and a shell-shaped connecting piece used for connecting the shell-shaped body and the shell-shaped body, the first traction assembly comprises a connecting piece which is connected to the teeth; the first traction piece is arranged on the shell-shaped body and located in the first direction of the connecting piece, and the first direction is the distal direction or the mesial direction; the first traction rope is connected with the connecting piece and the first traction piece; the second traction assembly comprises a second traction piece, the second traction piece is arranged on the shell-shaped body and located in the second direction of the connecting piece, and the second direction is opposite to the first direction; the anchorage piece is arranged in a dentition area which does not belong to the teeth, and the anchorage piece is positioned in the first direction of the second traction piece; and the second traction rope is connected with the second traction piece and the anchorage piece.

Description

Technical Field

[0001] This utility model relates to the field of orthodontic technology, and in particular to a shell-shaped dental instrument. Background Technology

[0002] Shell-shaped dental instruments made of polymer materials are increasingly popular due to their aesthetic appeal, convenience, and ease of cleaning. These instruments can be used to move teeth mesially or distally. In existing technologies, the shell-shaped instrument is typically designed according to the target tooth location, and its elastic deformation generates a force to move the tooth. However, due to the material properties, the shell-shaped instrument experiences a reaction force when moving the tooth. This reaction force is transmitted to other non-target teeth, causing them to experience undesirable forces and movements. Utility Model Content

[0003] The purpose of this invention is to provide a shell-shaped dental instrument that can reduce unintended movement of non-target teeth.

[0004] One embodiment of this utility model provides a shell-shaped dental instrument, comprising:

[0005] A shell-like body having a cavity for accommodating teeth;

[0006] A first traction assembly, comprising: a connector connected to the teeth; a first traction member disposed on the shell-like body and located in a first direction of the connector, the first direction being either a distal-mezzanine direction or a mesial-mezzanine direction; and a first traction rope connecting the connector and the first traction member.

[0007] The second traction assembly includes: a second traction member disposed on the shell-shaped body and located in a second direction of the connector, the second direction being opposite to the first direction; an anchorage member disposed in a dentition region other than that of the tooth, the anchorage member being located in a first direction of the second traction member; and a second traction rope connecting the second traction member and the anchorage member.

[0008] As a further improvement of one embodiment of the present invention, the teeth connecting the connector and the teeth continuously arranged with the teeth along the first direction form a tooth group, and the first traction member is disposed in the tooth group at a position corresponding to the teeth in the first direction.

[0009] As a further improvement of one embodiment of the present invention, at least two teeth in the tooth group are connected to the connector, and at least one of the connectors is connected to a tooth close to the second direction.

[0010] As a further improvement of one embodiment of the present invention, the teeth connecting the connector, or the teeth connecting the connector and the teeth continuously arranged with the teeth along the first direction form a tooth group; a moving channel is provided in the shell-shaped body, the moving channel is located in the first direction of the tooth group to allow the tooth group to move along the first direction in the moving channel, and the length of the moving channel is greater than or equal to the single-step target movement amount of the tooth group.

[0011] As a further improvement of one embodiment of the present invention, the first traction member is disposed at the corresponding position of the moving channel.

[0012] As a further improvement of one embodiment of the present invention, the teeth connecting the connector, or the teeth connecting the connector and the teeth continuously arranged with the teeth along the first direction form a tooth group; the first direction of the tooth group has a non-target tooth, and there is a gap between the non-target tooth and the tooth group, the gap being greater than 0.5 mm, and the first traction member is disposed at the position corresponding to the non-target tooth.

[0013] As a further improvement of one embodiment of the present invention, the shell-shaped body has a clearance portion located in a first direction of the non-target tooth, the clearance portion including a clearance channel with a length greater than the single-step target movement amount of the tooth group, or an opening that allows the non-target tooth to pass through.

[0014] As a further improvement of one embodiment of the present invention, the teeth connecting the connector form a tooth group, or the teeth connecting the connector and the teeth continuously arranged with the tooth along the first direction form the tooth group; the tooth group includes molars, the first direction is the distal direction, and the second direction is the mesial direction.

[0015] As a further improvement of one embodiment of the present invention, the second traction member is disposed in the anterior tooth area; the second traction member is disposed on the labial side.

[0016] As a further improvement to one embodiment of this utility model, it may be formed by a J-hook or by a Nance holder, lip guard, or jaw holder connected to the shell-like body.

[0017] As a further improvement of one embodiment of the present invention, the first traction component includes two sets, and the two sets of the first traction components are respectively disposed on the cheek side and the tongue side.

[0018] As a further improvement of one embodiment of the present invention, the connecting member is closer to the engagement surface than the first traction member.

[0019] As a further improvement of one embodiment of the present invention, the teeth connected to the connector form a tooth group, or the teeth connected to the connector and the teeth continuously arranged with the tooth along the first direction form the tooth group; the shell-shaped dental instrument further includes a guide attachment installed on the tooth group, the shell-shaped body is provided with a guide portion that cooperates with the guide attachment to guide the tooth group to move along the first direction; the tooth group includes at least two continuously arranged teeth, the connector and the guide attachment are connected to different teeth, and the connector is located in the second direction of the guide attachment.

[0020] As a further improvement of one embodiment of the present invention, the guide attachment is provided on both the buccal and lingual sides of the tooth assembly.

[0021] As a further improvement of one embodiment of the present invention, the shell-shaped body has an installation opening, at least part of the tooth surface is exposed from the installation opening and connected to the connector, and the gap between the connector and the edge of the installation opening is greater than the single-step target movement of the tooth.

[0022] The shell-shaped dental instrument provided by this utility model can drive the tooth group to move quickly by directly setting a first traction component on the tooth surface of the tooth group. At the same time, by setting a second traction component, the force generated by the second traction component can counteract the first force generated by the first traction component on the shell body, and can transfer the resistance force for the movement of the tooth group to other areas outside the dentition where the tooth group is located, thus avoiding unintended movement of other non-target teeth. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the shell-shaped dental instrument according to the first embodiment of the present invention;

[0024] Figure 2 for Figure 1 Another schematic diagram of the shell-shaped dental instrument shown;

[0025] Figure 3 for Figure 1 The diagram shows the forces acting on the shell-shaped dental instrument.

[0026] Figure 4 for Figure 1 Another schematic diagram of the shell-shaped dental instrument shown;

[0027] Figure 5 This is a schematic diagram of a shell-shaped dental instrument according to the second embodiment of the utility model;

[0028] Figure 6 This is a schematic diagram of a shell-shaped dental instrument according to the third embodiment of the utility model;

[0029] Figure 7 This is a schematic diagram of a shell-shaped dental instrument according to the fourth embodiment of the utility model. Detailed Implementation

[0030] The following detailed description incorporates the accompanying drawings, which form part of this specification. The illustrative embodiments mentioned in the specification and drawings are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art will understand, based on the teachings of this application, that many other embodiments can be employed and various changes can be made to the described embodiments without departing from the spirit and scope of this utility model. It should be understood that the various aspects of this application illustrated herein can be arranged, substituted, combined, separated, and designed in many different configurations, all of which are within the scope of this application.

[0031] See Figures 1 to 4 A shell-shaped dental instrument 100 according to the first embodiment of the present invention.

[0032] The shell-shaped dental instrument 100 includes a shell-shaped body 110 having a cavity S for receiving teeth.

[0033] The shell-shaped dental instrument 100 also includes a first traction assembly. The first traction assembly may include a connector 121, a first traction member 122, and a first traction rope 123.

[0034] The connector 121 is connected to the tooth. For ease of explanation, the tooth connected to the connector 121 will be referred to as tooth A.

[0035] The shell-like body 110 has an installation opening, through which at least a portion of the surface of tooth A is exposed and connected to connector 121. The gap between connector 121 and the edge of the installation opening is greater than the target single-step movement of tooth A. During the movement of tooth A, connector 121 does not contact shell-like body 110, thereby allowing the traction force of the first traction component to be directly transmitted to tooth A without being transmitted to shell-like body 111.

[0036] The first traction member 122 can be disposed on the shell-shaped body 110 and located in a first direction of the connector 121. The first direction can be a far-center direction or a near-center direction. The first traction member 122 can be directly attached to the surface of the shell-shaped body 110, or it can be integrally formed with the shell-shaped body 110.

[0037] The first traction rope 123 connects the connector 121 and the first traction member 122. The first traction rope 123 can be a spring, rubber band, etc. The two ends of the first traction rope 123 are suspended from the connector 121 and the first traction member 122 respectively, and undergo elastic deformation.

[0038] It can be seen that both the connector 121 and the first traction member 122 are used to suspend the first traction rope 123. The connector 121 and the first traction member 122 can be any structure capable of suspending the first traction rope 123, and can be made of any suitable material. For example, it can be a hook-shaped structure or other structures, and can be made of metal materials or polymer materials.

[0039] In this way, the first traction component can pull tooth A to move quickly in the first direction.

[0040] The shell-shaped dental instrument 100 also includes a second traction assembly. The second traction assembly may include a second traction member 131, a support member 132, and a second traction rope 133.

[0041] The second traction member 131 is disposed on the shell-shaped body 110 and located in a second direction of the connector 121, which is opposite to the first direction. It can be understood that if the first direction is the far-center direction, then the second direction is the near-center direction, and if the first direction is the near-center direction, then the second direction is the far-center direction.

[0042] The anchorage member 132 is disposed in the dental arch region that is not to which tooth A belongs, and the anchorage member 132 is located in the first direction of the second traction member 131.

[0043] The dentition to which tooth A belongs can be either the upper or lower dentition. The "dentition region to which tooth A belongs" includes all teeth in the dentition to which tooth A belongs, as well as the corresponding shell-like body 110 area. The dentition region not to which tooth A belongs can be understood as any other area within the oral cavity besides the dentition region to which tooth A belongs, including the alveolar bone, the opposing jaw, or areas that can be formed by other auxiliary instruments installed in the oral cavity, such as anchorage elements 132 formed by J-hooks, or anchorage elements 132 formed by Nance brackets, lip guards, or jaw brackets connected to the shell-like body.

[0044] For a specific example, if tooth A is an upper tooth, then the dentition to which tooth A belongs is the upper dentition, and the area of ​​the dentition to which tooth A belongs includes all the teeth of the upper dentition and the shell-like body 110 used to accommodate the upper dentition. The anchor 132 is disposed in a dentition area other than that to which tooth A belongs, that is, the anchor 132 cannot be installed on the tooth surface of the upper dentition or on the shell-like body 110 used to accommodate the upper dentition.

[0045] In this embodiment, the anchorage member 132 is disposed in the alveolar bone, and the anchorage member 132 may be a bone screw. In the mesiodistal direction, the anchorage member 132 needs to be located in the first direction of the second traction member 131.

[0046] See Figure 3In this embodiment, the first traction component applies a traction force in a first direction to tooth A, while simultaneously applying a first force F1 in a second direction to the shell-like body 110. The second traction component can apply a second force F2 in the first direction to the shell-like body 110. The second force F2 can be a component of the traction force generated by the second traction component. The second force F2 cancels out the first force F1, thereby reducing the force ultimately acting on the shell-like body 110, and further reducing the force transmitted through the shell-like body 110 to other non-target moving teeth, thus preventing unintended movement of non-target moving teeth.

[0047] In this embodiment, the first force F1 and the second force F2 can be equal, so that the shell-shaped dental instrument 100 can only move the tooth A along the first direction, avoiding other unintended movements.

[0048] Of course, the first force F1 can also be greater than the second force F2. In this case, although the unexpected first force F1 cannot be completely canceled, it can be partially canceled, which can reduce the force transmitted to the non-target moving tooth, thereby alleviating the unexpected movement of the non-target moving tooth.

[0049] The first force F1 can also be less than the second force F2. In this case, the reverse first force F1 is completely canceled out, and the shell-shaped body 110 as a whole is subjected to a force in the first direction. This force can be transmitted to the tooth A through the shell-shaped body 110, applying a thrust in the first direction to the tooth A, thereby accelerating the movement of the tooth A in the first direction.

[0050] In summary, during the design process, dentists can design the first and second traction components according to the patient's specific orthodontic needs. By setting the first and second traction components, tooth A can be pulled to move rapidly along the first direction. At the same time, the force transmitted to the shell-shaped body 110 can be reduced, thereby reducing the force transmitted from the shell-shaped body 110 to other non-target teeth and reducing the unintended movement of non-target teeth.

[0051] In the specific example provided by this utility model, tooth A is a molar. The first direction is the distal direction, and the second direction is the mesial direction. The shell-shaped dental instrument 100 is used to move tooth A in the distal direction. The connector 121 is connected to tooth A, and the first traction member 122 is disposed in the distal direction of the connector 121. The first traction member can move tooth A in the distal direction. At the same time, the shell-shaped body 110 is subjected to a first force F1 in the mesial direction. The first force F1 can be transmitted to the anterior teeth, which can easily cause labial tilting and labial displacement of the anterior teeth.

[0052] The second traction member 131 is disposed in the mesial direction of the connector 121, and the anchoring member 132 is disposed in the distal direction of the second traction member 131. The anchoring member 132 may be a bone screw implanted into the alveolar bone. The second traction assembly can apply a second force F2 to the shell-shaped body 110. The second force F2 can counteract the first force F1, thereby reducing the force transmitted to the anterior teeth and preventing labial tilting and displacement of the anterior teeth.

[0053] In this embodiment, the second traction member 131 can be disposed in the anterior tooth area. The second traction member 131 can be disposed on the labial side, so that the generated second force F2 can better prevent labial tilting and labial displacement of the anterior teeth.

[0054] In this embodiment, tooth A, or tooth A and teeth arranged continuously along a first direction with tooth A, form a tooth group.

[0055] In this context, continuous arrangement can be defined as a gap of less than 0.5 mm between two teeth. When there are no teeth continuously arranged with tooth A in the first direction, tooth A forms a tooth group on its own, and the other teeth besides tooth A are non-target teeth. That is, when using shell-shaped dental instruments, the target tooth to move is tooth A, and it is undesirable for the movement of tooth A to cause unintended movement of other teeth.

[0056] When there are consecutive teeth arranged in the first direction of tooth A, multiple teeth, including tooth A, together form a tooth group. Moving tooth A in the first direction can cause other teeth within the tooth group to move. However, the other teeth outside the tooth group are non-target teeth, and it is undesirable for the movement of the tooth group to cause unintended movement of these non-target teeth. For example... Figure 1 , Figure 2 As shown, the tooth group consists of three teeth arranged in a continuous row.

[0057] Furthermore, in one embodiment of this utility model, when the tooth group includes two or more teeth, the connector 121 is disposed in the tooth group near the tooth in the second direction. The traction force of the first traction component can be transmitted to the tooth A connected to the connector 121. When tooth A is moved in the first direction, tooth A transmits the force to other teeth in the tooth group located in its first direction, thereby driving the entire tooth group to move.

[0058] In one embodiment, the first traction member 122 is disposed at a position in the tooth assembly near the tooth in the first direction. That is, the first traction member 122 is disposed at a position in the shell-shaped body 110 near the tooth in the first direction.

[0059] The connector 121 and the first traction member 122 can be respectively set in the tooth area at both ends of the tooth group. The first traction rope 123 has a large traction distance, which can increase the traction force and thus speed up the movement of the tooth group.

[0060] Further, see Figure 4 In one embodiment of this utility model, a moving channel 111 is provided inside the shell-shaped body 110. The moving channel 111 is located in the first direction of the tooth group so as to allow the tooth group to move in the first direction within the moving channel 111. The length of the moving channel 111 is greater than or equal to the single-step target movement amount of the tooth group.

[0061] In this embodiment, the moving channel 111 provides space for the movement of the tooth assembly, allowing the tooth assembly to move rapidly within the moving channel 111. During the movement of the tooth assembly, the shell-like body 110 does not apply a force in the second direction to the tooth assembly, and the shell-like body 110 does not obstruct the movement of the tooth assembly along the first direction.

[0062] In this embodiment, the first traction member 122 may also be disposed at a corresponding position in the moving channel 111. The corresponding position in the moving channel 111 can be understood as the portion of the shell-like body 110 that forms the moving channel 111. This can further increase the traction distance and traction force, thereby improving the efficiency of tooth assembly movement.

[0063] Furthermore, in one embodiment of this utility model, the first traction assembly includes two sets, with the two sets of first traction assemblies respectively disposed on the buccal side and the lingual side. That is, a connector 121 is provided on both the buccal side and the lingual side of the tooth assembly, and a first traction member 122 is provided on both the buccal side and the lingual side of the shell-shaped body 110.

[0064] In this embodiment, the first force F1 acting on the shell-shaped body 110 is the sum of the forces exerted on the shell-shaped body 110 by the two sets of first traction components. By providing first traction components on both the buccal and lingual sides, the stability of the applied force can be improved, preventing the teeth from twisting during movement.

[0065] Furthermore, in one embodiment of this utility model, the connector 121 is closer to the occlusal surface than the first traction member 122. This can improve the stability of the suspension of the first traction rope 123 and the stability of the wearing of the shell-shaped body 110, making it less likely for the shell-shaped body 110 to detach from the teeth.

[0066] Furthermore, in one embodiment of this utility model, the shell-shaped dental instrument 100 also includes a guide attachment 113 installed on the tooth assembly. The shell-shaped body 110 is provided with a guide portion 114 that cooperates with the guide attachment 113 to guide the tooth assembly to move along a first direction.

[0067] The tooth assembly includes at least two teeth arranged in a continuous sequence. Connector 121 and guide attachment 113 are disposed on different teeth, with connector 121 located in the second direction of guide attachment 113.

[0068] In this embodiment, the guide attachment 113 can be a protrusion that is pasted onto the tooth surface, and the guide part 114 can be a guide channel disposed inside the shell-shaped body 110. The shape of the guide channel can be designed according to the expected movement path of the tooth assembly.

[0069] During the movement of the tooth group, the guide attachment 113 can move along the guide part 114. That is, through the cooperation of the guide attachment 113 and the guide part 114, the tooth group can be guided to move along the expected movement path, thereby avoiding deviation of the movement direction of the tooth group and preventing unexpected movement such as twisting of the tooth group during the movement, thus improving the orthodontic effect.

[0070] The shell-shaped dental instrument provided in this embodiment can be used on the maxilla or mandible, and can be used on one side or both sides simultaneously.

[0071] The tooth group includes molars. The following example, using the second premolar, first molar, and second molar as a specific illustration, will illustrate this.

[0072] The connector 121 can be attached to the second premolar. Specifically, the shell-like body 110 may have an installation opening in the area corresponding to the second premolar to facilitate the installation of the connector 121. The connector 121 may be provided on both the lingual and buccal sides of the second premolar.

[0073] Connectors 121 can be provided on multiple teeth in the tooth group. For example, in addition to the second premolar, the first molar can also be provided with connectors 121, thereby improving the distance migration efficiency of the tooth group.

[0074] The first traction member 122 is disposed in the distal direction of the connector 121. To increase the traction distance, the first traction member 122 may be disposed at the position corresponding to the second molar.

[0075] Of course, in this embodiment, the shell-shaped body 110 may be provided with a moving channel 111, which is located in the distal direction of the tooth group, that is, in the distal direction of the second molar, so as to allow the tooth group to move. When the moving channel 111 is provided in the shell-shaped body 110, the first traction member 122 may not be provided at the position corresponding to the second molar, but at the position corresponding to the moving channel 111.

[0076] In this way, the traction force of the first traction component can be transmitted to the second premolar, and then through the second premolar to the adjacent first and second molars, causing the entire tooth group to move rapidly distally. Simultaneously, the first traction component applies a first force F1 towards the mesial direction to the shell-shaped body 110, causing the shell-shaped body 110 to tend to move mesially as a whole. If the first force F1 is transmitted to the anterior teeth through the shell-shaped body 110, it may cause labial tipping or displacement of the anterior teeth.

[0077] In this embodiment, the second traction member 131 is disposed in the mesial direction of the connector 121, and the support member 132 is a bone nail and is located in the distal direction of the second traction member 131.

[0078] Thus, the traction force applied to the shell-shaped body 110 by the second traction component has a component force in the distal direction, forming a second force F2. The second force F2 can cancel out the first force F1, transferring the anchorage force to other positions outside the dentition, thereby reducing the anchorage force applied to the shell-shaped body 110 and preventing labial tilting and displacement of the anterior teeth.

[0079] In this embodiment, a guide attachment 113 can be adhered to the first molar, and a guide portion 114 that mates with the guide attachment 113 is provided on the shell-like body 110. The guide portion 114 can be a guide groove, and the guide attachment 113 can be placed in the guide groove. The guide portion 114 can be designed according to the expected movement path of the tooth assembly, and the extension direction of the guide portion 114 can coincide with the expected movement path of the tooth assembly. By providing the guide attachment 113 and the guide portion 114, the movement of the tooth assembly can be further guided, avoiding unexpected movements such as twisting or tilting of the tooth assembly.

[0080] See Figure 5 This is a shell-shaped dental instrument according to a second embodiment of the present invention. The difference between this shell-shaped dental instrument and the first embodiment lies in the different placement of the anchorage member 132. In this embodiment, the anchorage member 132 is positioned in the opposing tooth region of the target dentition, and the second traction assembly forms intermaxillary traction.

[0081] In other embodiments provided by this utility model, the anchorage 132 is also formed in other auxiliary instruments installed in the oral cavity, such as Nance brackets, J hooks, lip guards, and jaw brackets.

[0082] See Figure 6 This is a shell-shaped dental instrument according to a third embodiment of the present invention. The difference between this shell-shaped dental instrument and the first embodiment is that in this embodiment, at least two teeth in the tooth assembly are connected by connectors 121, wherein at least one connector 121 is located near the tooth in the second direction, ensuring that the force of the first traction component can be transmitted to every tooth in the tooth assembly. This improves the efficiency of pulling the entire tooth assembly towards the first direction.

[0083] See Figure 7 This is a shell-shaped dental instrument according to the fourth embodiment of the present invention.

[0084] In this embodiment, the first direction of the tooth group includes a non-target tooth, and there is a gap between the non-target tooth and the tooth group, the gap being greater than 0.5 mm. The first traction member 122 can be disposed at the position corresponding to the non-target tooth.

[0085] In this embodiment, the purpose of using dental instruments is to move the tooth assembly along a first direction, without intending to move non-target teeth located in that first direction. A gap exists between the tooth assembly and the non-target teeth to prevent the force applied to the tooth assembly by the shell-shaped dental instrument 100 from being transmitted to the non-target teeth.

[0086] The first traction member 122 is positioned in the area corresponding to the non-target tooth, which can further increase the traction distance, thereby increasing the traction force and improving the efficiency of tooth group movement.

[0087] In this embodiment, the shell-like body 110 may have a moving channel 111 located in the first direction of the tooth group. The moving channel 111 may be located between the tooth group and the non-target tooth, so that the tooth group can move quickly along the moving channel 111. In this embodiment, the first traction member 122 may not be provided in the area corresponding to the non-target tooth, but may be provided in the area corresponding to the moving channel 111.

[0088] In this embodiment, the shell-shaped body 110 may also have a clearance portion 112 located on the side of the non-target tooth in the first direction.

[0089] The clearance portion 112 can be a clearance channel with a length greater than the single-step target movement of the tooth group. The clearance portion may also include an opening that allows non-target teeth to pass through. Specifically, when the non-target tooth is the second molar, the clearance portion 112 is configured as an opening at one end of the shell-like body 110.

[0090] When using the shell-shaped dental instrument 100, the shell-shaped body 110 is subjected to a first force F1 in the second direction under the action of the first traction component. If the first force F1 is transmitted to a non-target tooth through the shell-shaped body 110, it may cause the non-target tooth to move unintended. By providing a clearance portion 112 on the side of the non-target tooth in the first direction, even if the shell-shaped body 110 moves as a whole in the second direction under the action of the first force F1, the first force F1 will not be transmitted to the non-target tooth through the shell-shaped body 110, thereby preventing the non-target tooth from moving unintended in the second direction.

[0091] The following will describe a specific implementation method using molars as the tooth group.

[0092] The tooth group may include the second premolar and the first molar. There may be a gap between the first and second molars, which is greater than 0.5 mm. The first molar is a non-target tooth. The orthodontic goal of the shell-shaped dental instrument 100 is to move the second premolar and the first molar in a distal direction, while the second molar remains stationary.

[0093] In this embodiment, a moving channel 111 for moving the tooth assembly may be provided inside the shell-shaped body 110, and the moving channel 111 is located between the first molar and the second molar.

[0094] The connector 121 can be connected to the second premolar. The first traction member 122 can be set at the corresponding position of the second molar or at the corresponding position of the moving channel 111. In this way, the traction distance can be increased, the traction force can be increased, and the moving efficiency of the tooth group can be improved.

[0095] The second traction rope 133 can be set in the anterior tooth region, and the anchorage 132 can be set in the distal direction of the second traction member 131. The anchorage 132 can be a bone screw implanted into the alveolar bone.

[0096] In this embodiment, a guide attachment 113 may be connected to the first molar, and the shell-shaped body 110 may have a guide portion 114 that cooperates with the guide attachment 113 to prevent the tooth assembly from twisting or moving unexpectedly during the distalization process.

[0097] In this embodiment, a clearance portion 112 is provided in the shell-shaped body 110 in the distal direction of the second molar. Specifically, the end of the shell-shaped body 110 may have a through opening, or a clearance channel may be provided within the shell-shaped body 110. Thus, even if the shell-shaped body 110 moves as a whole in the mesial direction under the action of the first traction component, the shell-shaped body 110 will not transmit force to the second molar, thereby preventing unintended mesial movement of the second molar.

[0098] In this embodiment, a guide attachment 113 may be connected to the first molar, and the shell-shaped body 110 may be provided with a guide portion 114 that cooperates with the guide attachment 113 to guide the second premolar and the first molar to move along the expected movement path.

[0099] In summary, the shell-shaped dental instrument 100 provided by this utility model can drive the tooth group to move quickly by directly setting the first traction component on the tooth surface of the tooth group. At the same time, by setting the second traction component, the force generated by the second traction component can counteract the first force F1 generated by the first traction component on the shell-shaped body 110, and the resistance force for the movement of the tooth group can be transferred to other areas outside the dentition where the tooth group is located, thus avoiding unintended movement of other non-target teeth.

[0100] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0101] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A shell-shaped dental instrument, characterized in that, include: A shell-like body having a cavity for accommodating teeth; A first traction assembly, comprising: a connector connected to the teeth; a first traction member disposed on the shell-like body and located in a first direction of the connector, the first direction being either a distal-mezzanine direction or a mesial-mezzanine direction; and a first traction rope connecting the connector and the first traction member. The second traction assembly includes: a second traction member disposed on the shell-shaped body and located in a second direction of the connector, the second direction being opposite to the first direction; an anchorage member disposed in a dentition region other than that of the tooth, the anchorage member being located in a first direction of the second traction member; and a second traction rope connecting the second traction member and the anchorage member.

2. The shell-shaped dental instrument as described in claim 1, characterized in that, The teeth connecting the connector and the teeth continuously arranged along the first direction form a tooth group, and the first traction member is disposed in the tooth group at a position corresponding to the teeth in the first direction.

3. The shell-shaped dental instrument as described in claim 2, characterized in that, At least two teeth in the tooth group are connected to the connector, and at least one of the connectors is connected to a tooth near the second direction.

4. The shell-shaped dental instrument as described in claim 1, characterized in that, The teeth connecting the connector, or the teeth connecting the connector and the teeth continuously arranged with the teeth along the first direction form a tooth group; a moving channel is provided in the shell-shaped body, the moving channel is located in the first direction of the tooth group to allow the tooth group to move along the first direction within the moving channel, the length of the moving channel being greater than or equal to the single-step target movement amount of the tooth group.

5. The shell-shaped dental instrument as described in claim 4, characterized in that, The first traction component is positioned at the corresponding location of the moving channel.

6. The shell-shaped dental instrument as claimed in claim 1, characterized in that, The teeth connecting the connector, or the teeth connecting the connector and the teeth continuously arranged with the teeth along the first direction form a tooth group; the first direction of the tooth group has a non-target tooth, and there is a gap between the non-target tooth and the tooth group, the gap being greater than 0.5 mm, and the first traction member is disposed at the position corresponding to the non-target tooth.

7. The shell-shaped dental instrument as claimed in claim 6, characterized in that, The shell-like body has a clearance portion located in a first direction of the non-target tooth, the clearance portion including a clearance channel with a length greater than the single-step target movement of the tooth group, or an opening that allows the non-target tooth to pass through.

8. The shell-shaped dental instrument as claimed in claim 1, characterized in that, The teeth connecting the connector form a tooth group, or the teeth connecting the connector and the teeth continuously arranged with the connector along the first direction form the tooth group; the tooth group includes molars, the first direction is the distal direction, and the second direction is the mesial direction.

9. The shell-shaped dental instrument as claimed in claim 8, characterized in that, The second traction member is located in the anterior tooth region; the second traction member is located on the labial side.

10. The shell-shaped dental instrument as claimed in claim 1, characterized in that, The anchorage is disposed in the alveolar bone or the opposing teeth of the target dentition, or is formed by a J-hook, or by a Nance bracket, lip guard, or jaw bracket connected to the shell-like body.

11. The shell-shaped dental instrument as claimed in claim 1, characterized in that, The first traction component includes two sets, which are respectively disposed on the cheek side and the tongue side.

12. The shell-shaped dental instrument as claimed in claim 1, characterized in that, The connector is closer to the engagement surface than the first traction member.

13. The shell-shaped dental instrument as claimed in claim 1, characterized in that, The teeth connected to the connector form a tooth group, or the teeth connected to the connector and teeth continuously arranged with the tooth along the first direction form the tooth group; the shell-shaped dental instrument further includes a guide attachment installed on the tooth group, the shell-shaped body is provided with a guide portion that cooperates with the guide attachment to guide the tooth group to move along the first direction; the tooth group includes at least two continuously arranged teeth, the connector and the guide attachment are connected to different teeth, and the connector is located in the second direction of the guide attachment.

14. The shell-shaped dental instrument as claimed in claim 13, characterized in that, The guide attachments are provided on both the buccal and lingual sides of the tooth group.

15. The shell-shaped dental instrument as claimed in claim 1, characterized in that, The shell-shaped body has an opening The tooth surface is at least partially exposed through the mounting opening and connected to the connector. The gap between the connector and the edge of the mounting opening is greater than the single-step target movement of the tooth.

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