A combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque

Abstract

The present invention relates to the field of oral medicine orthodontic technology, and provides a combined invisible orthodontic appliance with adjustable torque direction and size, mainly including a load-bearing pillow for fixing on the surface of a tooth crown and a matching brace for covering the tooth and the load-bearing pillow, wherein the load-bearing pillow is a polyhedron structure, and the surfaces constituting the polyhedron structure include a bonding surface and a load-bearing surface, and the load-bearing surface is a surface on which a force is applied to the load-bearing pillow by the matching brace; thus, the combined invisible orthodontic appliance can apply a directional torque to the tooth by applying a force to the load-bearing pillow, so as to realize the rotation and / or movement of the tooth. The present invention places the force-adding system attached to the crown as close as possible to the impedance center of the tooth, so as to reduce the tilting torque, increase the root control torque, increase the rotation torque, and efficiently complete the overall movement or root control movement of the tooth. At the same time, it is convenient to design the application of directional and quantitative torque, improve the correction efficiency and effectiveness, and ensure medical safety.

Description

Technical Field

[0001] The present invention relates to the technical field of oral medicine orthodontics, and in particular to a combined invisible orthodontic appliance capable of adjusting the direction and size of torque. Background Art

[0002] In the field of orthodontic tooth correction, it is difficult to achieve overall movement of the tooth root and crown in the same direction or controlled root movement in which the root moves a longer distance than the crown, which is exactly what is needed for therapeutic effect. Especially in tooth extraction cases and some complex cases, whether the tooth can be moved as a whole or with controlled root movement will directly determine the success or failure of the correction, which is related to medical safety, efficacy and stability. In addition, making the tooth rotate around the long axis of the tooth is also a difficulty of invisible correction. The key to making the tooth move as a whole, with controlled root movement or with rotation is to effectively control the direction and size of the torque.

[0003] The point of force applied by the orthodontic device of the prior art to the crown is located on the right side of the impedance center of the tooth. Because it is far away from the impedance center of the tooth, it will produce an obvious tilting torque, which tilts the crown in the same direction as the movement of the tooth. If the tooth is to move as a whole or control the root movement, it is necessary to apply a force couple in the opposite direction of the tilting torque to the crown to counteract the torque; or use a long traction hook to place the point of force application near the impedance center of the tooth, and reduce the force arm to directly reduce or eliminate the tilting torque. The traditional fixed orthodontic device has a high degree of compatibility with the method of applying a force couple on the crown or using a long traction hook, but it has the disadvantages of poor aesthetics, being not conducive to oral hygiene maintenance, and irritating the oral mucosa. The bracketless invisible braces have many advantages such as beauty, comfort, and being conducive to oral hygiene maintenance, but due to the limitations of the braces material performance, the force couple applied by the braces on the crown is difficult to reach a size that can completely counteract or even exceed the tilting torque. As a fixed orthodontic auxiliary device, the long traction hook has limited compatibility with existing invisible braces and has the disadvantage of irritating the oral mucosa. Therefore, for the existing invisible orthodontic technology, the key to producing overall movement, root control movement or rotational movement of teeth lies in how to reduce the tilting torque, increase the root control torque, and increase the rotational torque to achieve the effect of effectively controlling the direction and size of the torque.

[0004] In the field of bracketless invisible orthodontics of the prior art, how to achieve the overall movement of teeth or control the root movement is still an unresolved problem, a bottleneck in the development of dental orthodontics technology, and one of the main reasons for invisible orthodontics to lose control midway, frequently restart, or even fail. In the invisible orthodontics of the prior art, the inability to achieve the overall movement of teeth or control the root movement can cause negative effects such as molars tipping into the extraction space, loss of posterior tooth anchorage, loss of anterior tooth torque control, tooth roots penetrating the bone cortex, and deepening of anterior overbite, threatening medical safety and significantly affecting the treatment effect. Therefore, there is an urgent need for an invisible orthodontic appliance that can adjust the direction and size of the torque to solve the above clinical problems. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a combined invisible orthodontic appliance with adjustable torque direction and size, and to place the force system attached to the crown as close as possible to the impedance center of the tooth to reduce the tilting torque, increase the root control torque, and increase the rotational torque, so as to efficiently complete the overall movement or root control movement of the tooth. At the same time, it is convenient to design and apply directional and quantitative torque, thereby improving correction efficiency and effectiveness and ensuring medical safety.

[0006] To achieve the above objectives, the present invention is implemented by adopting a technical solution consisting of the following technical measures.

[0007] A combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, mainly comprising a load-bearing pillow for fixing on the surface of a tooth crown and a matching brace for covering the tooth and the load-bearing pillow.

[0008] The load-bearing pillow is a polyhedral structure, and the surfaces constituting the polyhedral structure include a bonding surface and a load-bearing surface. The bonding surface is a surface used for bonding and fixing with the surface of the tooth crown, and the load-bearing surface is a surface on which the matching braces exert a force on the load-bearing pillow, and the torque direction of the applied force is the same as the vertical direction of the load-bearing surface; therefore, the combined invisible orthodontic appliance can exert a directional torque on the teeth by exerting a force on the load-bearing pillow, so as to realize the rotation and / or movement of the teeth;

[0009] The force applied by the paired braces to the load-bearing pillow is based on the elastic deformation force of the paired braces themselves.

[0010] Those skilled in the art know that existing invisible braces usually rely on the elastic deformation of the braces themselves to apply force to the teeth. Therefore, existing invisible braces usually have a brace configuration that completely covers the teeth, and this configuration does not have space for the teeth to move, similar to the covering design that forms a static fit between the invisible braces and the teeth. However, braces usually made of a single material cannot have the mechanical properties of sufficient rigidity and continuous high resilience. In addition, the friction between the braces and the tooth surface in the direction of rotation of the teeth around the long axis of the teeth is small. Therefore, the torque or couple applied by the braces on the teeth cannot reach a long-term and sufficient value, making it difficult to efficiently move the teeth as a whole, control the root movement, or rotate them. In many cases, especially complex cases such as severe torsion and severe protrusion, there are problems such as low correction efficiency and poor safety and controllability.

[0011] The inventive point of the present invention is to use a load-bearing pillow fixed on the surface of the tooth crown as a load-bearing structure. In one of the technical solutions, because the load-bearing surface on the load-bearing pillow is independent of the tooth, for the tooth movement method of rotating around the long axis of the tooth, the load-bearing pillow protruding from the tooth surface naturally has a larger lever arm than the bonding surface, and thus has a larger torque acting on the tooth, thereby achieving more efficient rotational movement of the tooth. In one of the technical solutions, the load-bearing pillow can be set at any position of the crown surface. By adjusting the position of the load-bearing pillow and the shape of the polyhedral structure, the distance between the geometric center of the load-bearing surface and the impedance center of the tooth can be selected and regulated, thereby increasing or decreasing the force arm of the torque. For example, when the geometric center of the load-bearing surface approaches the back of the crown, the tilting torque increases, while when the geometric center of the load-bearing surface approaches the neck of the crown or the gingival, the tilting torque decreases. At the same time, a force couple can be further formed by setting paired load-bearing surfaces. By adjusting the size and positional relationship of the load-bearing surfaces, the force couple arm can be increased or decreased to adjust the size of the force couple. For example, the root control torque can be increased by reducing the tilting torque while adjusting the large couple.

[0012] In addition, the bearing surface can be based on the polyhedral shape of the bearing pillow. The bearing surface can be set on different surfaces of the bearing pillow (except the bonding surface) and have any direction. Because the bearing surface is different from the irregular shape of the tooth surface, it can be designed and controlled based on the common knowledge of geometric mechanics, so the torque direction is easy to control. The magnitude of the force applied to the bearing surface can be controlled based on factors such as the shape, size, and area of ​​the bearing surface.

[0013] The combined invisible orthodontic appliance provided by the present invention can enable teeth to undergo highly difficult movements such as efficient overall movement, root-controlled movement or rotational movement, thereby improving treatment efficacy and medical safety.

[0014] Based on the above invention, the following terms need to be explained and defined:

[0015] Tilting moment: The moment is in a plane parallel to the long axis of the tooth, which causes the crown to tilt in the same direction as the tooth movement;

[0016] Root control torque: In order to offset or exceed the tilting torque, a force couple in the opposite direction of the tilting torque is applied to the crown. The vector synthesis of this force couple and the tilting torque is the root control torque. The root control torque is in the opposite direction of the tilting torque, so that the root moves in the same direction as the tooth movement.

[0017] Rotational torque: The torque is located in a plane perpendicular to the long axis of the tooth, which causes the tooth to rotate around the long axis of the tooth.

[0018] It should be noted that the paired braces of the present invention exert a force on the load-bearing pillow, mainly including generating any one or more of the above-mentioned tilting moment, root control moment, and rotational moment.

[0019] In this article, the matching braces mainly include a brace structure for covering teeth, which can correspond to the maxillary and / or mandibular dentition, or a dentition segment consisting of multiple teeth located in the maxillary and / or mandibular dentition. The other necessary structures of the brace structure are equivalent to those of conventional invisible braces, and can be designed and manufactured according to the structure of conventional invisible braces, such as the structure of the brace covering the attachment, the structure of the brace covering the gums, and the precision cutting on the brace.

[0020] It should be noted that the force applied by the paired braces to the load-bearing pillow is based on the elastic deformation force of the paired braces themselves, and is also based on the force applied by conventional invisible braces on teeth in the prior art, for example, by limiting.

[0021] In this article, the load-bearing pillow is fixed on the surface of the tooth crown by its adhesive surface, and its specific fixing position is arbitrary. In one of the preferred technical solutions, considering that it should not affect human oral activities such as chewing, the load-bearing pillow is preferably fixed on the axial surface of the crown, that is, the mesial surface, distal surface, labial / buccal surface or lingual / palatal surface of the crown; in one of the more preferred technical solutions, when it is necessary to achieve the purpose of reducing the tilting moment, the load-bearing pillow is preferably fixed in the area of ​​1 / 2 of the crown neck, and the area of ​​1 / 2 of the crown neck refers to the 1 / 2 area close to the gingival side after the clinical crown is divided into two equal parts in height from the gingival to the gingival side; in the usual application method, the load-bearing pillow is fixed close to the long axis of the tooth.

[0022] In this article, the load-bearing surface is subjected to the applied force of the matching braces, so the torque direction of the applied force is the same as the vertical direction of the load-bearing surface, and the rotation and / or movement of the teeth is achieved by the torque formed by the applied force. Therefore, the shape of the load-bearing surface is a shape that can calculate the size and direction of the force arm through geometric mechanics in common knowledge. In one of the technical solutions, in order to facilitate calculation and regulation, the load-bearing surface is a plane shape or a curved surface (including a spherical surface); when the load-bearing surface is a curved surface shape, its vertical direction is equivalent to the vertical direction of the plane tangent to the curved surface at the point of action of the resultant force acting on it.

[0023] In this article, the load-bearing surface can be any one or more surfaces of the polyhedron of the load-bearing pillow except the bonding surface, and the load-bearing surface can have different force arm sizes based on the change of the relative position with the bonding surface.

[0024] It should be noted that in the present invention, the load-bearing surface has a definite shape and vertical direction, and compared with the irregular shape of the tooth surface, the magnitude and direction of the force, torque or couple applied can be easily obtained through geometric mechanics calculations or summarized laws. Therefore, it has a significant improvement in the ease of design when subjected to applied forces and torques.

[0025] In this article, the bearing pillow is a polyhedral structure, including a bonding surface and a bearing surface, and the number of its bearing surfaces matches the number of forces applied by the matching braces on the bearing pillow. For example, when the matching braces need to apply two or more forces to the bearing pillow to form a couple relationship, two or more corresponding bearing surfaces are required. It should be noted that the number of bearing surfaces mainly depends on the target position of the rotation and / or movement of the teeth, which is calculated based on the common knowledge in the field of oral orthodontics.

[0026] Based on this, in one of the technical solutions, the polyhedral structure of the load-bearing pillow also includes a non-load-bearing surface, which is a constituent surface in the polyhedral structure of the load-bearing pillow, and the non-load-bearing surface is a surface that will not be affected by the force applied to the load-bearing pillow by the matching braces, or is affected by a force that can be offset / negligible due to its proximity to the load-bearing surface.

[0027] Based on this, since the force exerted by the matching braces on the load-bearing pillow is based on the elastic deformation force of the matching braces themselves, in one of the technical solutions, the matching braces are wrapped around the non-load-bearing surface with a gap for a non-static fit.

[0028] In one of the technical solutions, in order to completely prevent the non-load-bearing surface from being subjected to force exerted by the matching braces, the matching braces are hollowed out at the corresponding position of the non-load-bearing surface.

[0029] In one of the technical solutions, the combined invisible braces provided by the present invention do not include a structure for applying force to the teeth, that is, the paired braces only apply force to the load-bearing pillow.

[0030] In one of the technical solutions, the combined invisible braces provided by the present invention include a structure for applying a force to the teeth, which cooperates with the force applied by the paired braces to the bearing pillow, for example, forming a force couple. Furthermore, because the force applied by the paired braces to the teeth includes a tilting moment for non-therapeutic purposes, in one of the more preferred technical solutions, the force applied by the paired braces to the bearing pillow includes forming a force couple or moment to offset the tilting moment.

[0031] It should be noted that due to the irregular shape of the tooth surface, the structure of conventional invisible braces that apply force to the teeth cannot accurately adjust the direction of the torque, which will be accompanied by the generation of tilting torque that is not for therapeutic purposes. In addition, the material properties of existing invisible braces make it difficult to apply a continuous and sufficient effective force couple on the crown to counteract the above-mentioned tilting torque, and therefore it is difficult to provide an effective force system that can enable the teeth to produce overall or root-controlled movement.

[0032] In one of the technical solutions, when the load-bearing pillow is fixed on the neck of the tooth crown, its load-bearing surface extends to the gingival margin or the periphery of the gums, and the projection of the geometric center of the load-bearing surface on the tooth crown reaches the neck of the tooth crown, the gingival margin or the gums, so that the applied force on the load-bearing surface is close to the impedance center of the tooth. This is a torque setting that conventional invisible braces cannot achieve by only applying force to the teeth.

[0033] To facilitate cleaning, in one of the preferred technical solutions, when the load-bearing pillow is fixed on the neck of the crown, its load-bearing surface extends to the gingival margin or the periphery of the gums, and there is a gap between the extending part of the load-bearing pillow toward the gums and the gingival margin and / or the gums, which is conducive to cleaning food residues between the load-bearing pillow and the gums.

[0034] Generally speaking, when the load-bearing pillow is fixed in the area of ​​1 / 2 of the crown neck, its load-bearing surface extends to the gingival margin or the periphery of the gums, and the extension of the corresponding load-bearing pillow toward the gums should not exceed 3 mm.

[0035] Generally, based on the limitation of the amount of force applied to the teeth being corrected in oral orthodontic technology, in order to avoid unpredictable consequences of excessive force, in one of the technical solutions, the number of load-bearing surfaces of the load-bearing pillow is not more than 6, or the load-bearing pillow is a polyhedron structure with 3 to 8 faces.

[0036] It should be noted that the combined invisible braces provided by the present invention can directly use the dental resin material commonly used in invisible braces technology, and the material of the matching braces can directly select the material commonly used in invisible braces in the prior art, or the material commonly used in the field of oral medicine orthodontics. In one of the preferred technical solutions, the specific model of the dental resin material used in the load-bearing pillow can directly refer to the selection of dental resins available on the market in the field, and the material of the matching braces can directly refer to the selection of invisible braces available on the market in the field.

[0037] For ease of installation, in one of the technical solutions, when the bearing pillow is fixed to the crown surface, the labial / buccal-lingual thickness cannot exceed 3mm, and in order to fully construct the bearing surface, the labial / buccal-lingual thickness should not be less than 0.5mm. In one of the more preferred technical solutions, the mesiodistal width of the bearing pillow is 1.5-8mm, and the gingival height is 1-6mm, so that it is more suitable for placement in the human oral cavity.

[0038] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a heptahedron structure, including a crown surface, a gingival surface, a gingival lateral surface, a gingival lateral surface, a crown lateral surface, a mesial surface, and a distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0039] The gingival surface faces the gingival mucosa, is adjacent to the crown surface and is located on the gingival side of the crown surface; the gingival lateral side faces the oral vestibule mucosa or the palate / lingual mucosa, is adjacent to the gingival surface and is located on the outside of the gingival surface; the apical surface is adjacent to the crown surface and faces the apical side of the crown; the crown lateral side faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival lateral side, and its apical edge is adjacent to the apical surface; the mesial surface faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface, the gingival surface, the gingival lateral side, the apical surface and the crown lateral side, respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface, the gingival surface, the gingival lateral side, the apical surface and the crown lateral side, respectively;

[0040] The mesial surface and the distal surface are load-bearing surfaces, and the load-bearing surfaces extend to the periphery of the gums. There is a gap between the extending portion of the corresponding load-bearing pillow toward the gums and the gum margin and the gums, that is, there is a gap between the gum surface and the gum margin and the gums; the gum surface, the outer gum surface, the gingival surface, and the outer crown surface are non-load-bearing surfaces;

[0041] The mesial surface and the distal surface are planar pentagonal shapes, respectively perpendicular to the crown neck surface, so as to facilitate applying an additional force couple to the tooth in the mesial and distal directions to obtain a larger force couple to achieve overall movement of the tooth or control root movement.

[0042] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a heptahedron structure, including a crown surface, a gingival surface, a gingival lateral surface, a gingival lateral surface, a crown lateral surface, a mesial surface, and a distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0043] The gingival surface faces the gingival mucosa, is adjacent to the crown surface and is located on the gingival side of the crown surface; the gingival lateral side faces the oral vestibule mucosa or the palate / lingual mucosa, is adjacent to the gingival surface and is located on the outside of the gingival surface; the apical surface is adjacent to the crown surface and faces the apical side of the crown; the crown lateral side faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival lateral side, and its apical edge is adjacent to the apical surface; the mesial surface faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface, the gingival surface, the gingival lateral side, the apical surface and the crown lateral side, respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface, the gingival surface, the gingival lateral side, the apical surface and the crown lateral side, respectively;

[0044] When the outer gingival surface is the load-bearing surface, the load-bearing surface extends to the periphery of the gingiva, and there is a gap between the extension portion of the corresponding load-bearing pillow toward the gingival direction and the gingival margin and the gingiva, that is, there is a gap between the gingival surface and the gingival margin and the gingiva; the gingival surface, the gingival surface, the outer crown surface, the mesial surface, and the distal surface are non-load-bearing surfaces; the angle between the outer gingival surface and the gingival plane is 0-40°, so as to facilitate the application of an elongation force to the tooth and facilitate the vertical upward control of the crown;

[0045] When the gingival surface is the load-bearing surface, the load-bearing surface extends to the periphery of the gums, and there is a gap between the extending part of the corresponding load-bearing pillow toward the gums and the gingival margin and the gums, that is, there is a gap between the gingival surface and the gingival margin and the gums; the gingival surface, the gingival outer surface, the crown outer surface, the mesial surface, and the distal surface are non-load-bearing surfaces; the angle between the gingival surface and the gingival plane is 0~40°, so as to facilitate the application of a downward force to the teeth and to facilitate the vertical upward control of the crown.

[0046] It should be noted that the above-mentioned heptahedron structure is conducive to applying a three-dimensional correction force to the tooth crown, or controlling the tooth crown in three dimensions, and is one of the preferred common structures in the technical solution of the present invention.

[0047] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a hexahedral structure, including a crown surface, a gingival surface, a gingival surface, a crown lateral surface, a mesial surface, and a distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0048] The gingival surface faces the gingival direction of the crown, is adjacent to the crown surface and is located on the gingival side of the crown surface; the apical surface is adjacent to the crown surface and faces the apical side of the crown; the lateral side of the crown faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival surface, and the apical edge is adjacent to the apical surface; the mesial surface faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface, the gingival surface, the apical surface and the lateral side of the crown, respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface, the gingival surface, the apical surface and the lateral side of the crown, respectively;

[0049] The gingival surface is in an arc shape, and there is a gap between the extension of the corresponding bearing pillow toward the gingival direction and the gingival margin and the gingiva, that is, there is a gap between the gingival surface and the gingival margin and the gingiva; the bearing surface can be selected from any one or more of the gingival surface, the posterior surface, the outer side of the crown, the mesial surface, and the distal surface;

[0050] Furthermore, the gum surface is preferably a hemispherical surface, so as to facilitate cleaning of food residues between the load-bearing pillow and the gums, and to facilitate oral hygiene maintenance.

[0051] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a hexahedral structure, including a crown surface, a gingival surface, a gingival surface, a crown lateral surface, a mesial surface, and a distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0052] The gingival surface faces the gingival mucosa, is adjacent to the crown surface and is located on the gingival side of the crown surface; the apical surface is adjacent to the crown surface and faces the apical side of the crown; the lateral side of the crown faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival surface, and its apical edge is adjacent to the apical surface; the mesial surface faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface, the gingival surface, the apical surface and the lateral side of the crown, respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface, the gingival surface, the apical surface and the lateral side of the crown, respectively;

[0053] The outer side surface of the crown is in an arc shape, and there is a gap between the extension of the corresponding load-bearing pillow toward the gum direction and the gingival margin and the gum, that is, there is a gap between the gingival surface and the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the gingival surface, the gingival surface, the outer side surface of the crown, the mesial surface, and the distal surface;

[0054] Furthermore, the outer surface of the crown is preferably the one with the largest contact area with the matching braces; this makes it easier to remove and wear the braces, and is suitable for situations where the retention force needs to be reduced and the required buccal-lingual or labio-lingual force couple value is small, there is no need to apply elongation force to the teeth, or there is no need to use the teeth as support to depress adjacent teeth.

[0055] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a hexahedral structure, including a crown surface, a gingival surface, a gingival lateral surface, a crown lateral surface, a mesial surface, and a distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0056] The gingival surface faces the gingival mucosa, is adjacent to the crown surface and is located on the gingival side of the crown surface; the gingival lateral surface faces the oral vestibule mucosa or the palate / lingual mucosa, is adjacent to the gingival surface and is located on the outside of the gingival surface; the crown lateral surface faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival lateral surface, and its lateral edge is adjacent to the crown surface; the mesial surface faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface, the gingival surface, the gingival lateral surface and the crown lateral surface respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface, the gingival surface, the gingival lateral surface and the crown lateral surface respectively;

[0057] The outer side surface of the crown is in an arc shape, and there is a gap between the extension of the corresponding load-bearing pillow toward the gum direction and the gingival margin and the gum, that is, there is a gap between the gingival surface and the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the gingival surface, the outer side surface of the gum, the outer side surface of the crown, the mesial surface, and the distal surface;

[0058] Furthermore, the outer surface of the crown is preferably the one with the largest contact area with the matching braces; this makes it easier to take off and put on braces, and is suitable for situations where the mesiodistal force couple value required for tooth movement is small, the buccal-lingual or labio-lingual force couple value required is small, and the teeth need to be elongated or used as anchor teeth to depress adjacent teeth.

[0059] It should be noted that the above hexahedron structure is based on the heptahedron structure, that is, the two non-crown surfaces of the heptahedron structure are mainly merged into arc surfaces to form additional technical effects or structural improvements.

[0060] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a pentahedral structure, including a crown surface, a gingival surface, a crown lateral surface, a mesial surface, and a distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0061] The gingival surface faces the gingival mucosa, is adjacent to the crown surface and is located on the gingival side of the crown surface; the crown lateral surface faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival surface, and its lateral edge is adjacent to the crown surface; the mesial surface faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface, the gingival surface and the crown lateral surface respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface, the gingival surface and the crown lateral surface respectively;

[0062] The outer side surface of the crown is in an arc shape, and there is a gap between the extension of the corresponding load-bearing pillow toward the gum direction and the gingival margin and the gum, that is, there is a gap between the gingival surface and the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the gingival surface, the outer side surface of the crown, the mesial surface, and the distal surface;

[0063] Furthermore, the outer side of the crown is preferably the one with the largest contact area with the matching braces; because the outer side of the crown facing the oral vestibule and the back is a smooth arc surface, it is more convenient to wear and comfortable to wear. It is suitable for situations where the retention force needs to be reduced and the mesio-distal force couple required for tooth movement is small, there is no need to apply buccolingual or labio-lingual force couple to the teeth, there is no need to apply elongation force to the teeth, or there is no need to use the teeth as support to depress adjacent teeth.

[0064] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a pentahedral structure, including a crown surface, a crown lateral surface, a camber surface, a mesial surface, and a distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0065] The outer side of the crown faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the crown surface, and the gingival edge is adjacent to the gingival surface; the gingival surface is adjacent to the crown surface and faces the gingival side of the crown; the mesial surface faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface, the gingival surface, and the outer side of the crown respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface, the gingival surface, and the outer side of the crown respectively;

[0066] The outer side surface of the crown is in an arc shape and together with the mesial surface and the distal surface, constitutes an extension of the load-bearing pillow toward the gum direction. There is a gap between the extension of the corresponding load-bearing pillow toward the gum direction and the gingival margin and the gum, that is, there is a gap between the outer side surface of the crown and the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the outer side surface of the crown, the apical surface, the mesial surface, and the distal surface;

[0067] Furthermore, the outer side of the crown is preferably the one with the largest contact area with the matching braces; because the outer side of the crown is a smooth arc surface facing the oral vestibule and the gums, it is more convenient to wear and is beneficial to oral hygiene maintenance. It is suitable for situations where the retention force needs to be reduced and the mesiodistal force couple value required for tooth movement is small, the vertical upward force required is small, and there is no need to apply buccolingual or labiolingual force couples to the teeth.

[0068] It should be noted that the above-mentioned pentahedral structure is based on the heptahedral structure, that is, the three non-crown surfaces of the heptahedral structure are mainly merged into arc surfaces to form additional technical effects or structural improvements.

[0069] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a tetrahedral structure, including a crown surface, a crown lateral surface, a mesial surface, and a distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0070] The outer side of the crown faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge and lateral edge are adjacent to the crown surface respectively; the mesial surface faces the mesial direction of the tooth, and is adjacent to the mesial edge of the crown surface and the outer side of the crown respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edge of the crown surface and the outer side of the crown respectively;

[0071] The outer side surface of the crown is in an arc shape and together with the mesial surface and the distal surface, constitutes an extension of the load-bearing pillow toward the gum direction. There is a gap between the extension of the load-bearing pillow toward the gum direction and the gingival margin and the gum, that is, there is a gap between the outer side surface of the crown and the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the outer side surface of the crown, the mesial surface, and the distal surface;

[0072] Furthermore, the outer side of the crown is preferably the one with the largest contact area with the matching braces; because the outer side of the crown facing the oral vestibule, the gingival side and the back side are all smooth arc surfaces, it is more convenient to wear, comfortable to wear and conducive to oral hygiene maintenance. It is suitable for situations where the retention force needs to be reduced and the mesiodistal force couple value required for tooth movement is small, the required vertical upward force is small, and there is no need to apply buccolingual or labiolingual force couples to the teeth.

[0073] It should be noted that the above tetrahedron structure is based on the heptahedron structure, that is, the four non-crown surfaces of the heptahedron structure are mainly merged into arc surfaces to form additional technical effects or structural improvements.

[0074] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a trihedron structure, including a crown surface, an outer crown bevel, and a mesial surface / distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0075] The outer bevel of the crown faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge and lateral edge are adjacent to the crown surface respectively; the mesial surface faces the mesial direction of the tooth, and is adjacent to the crown surface and the mesial edge of the outer bevel of the crown respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the crown surface and the distal edge of the outer bevel of the crown respectively;

[0076] The outer bevel of the crown is in an arc shape and together with the mesial / distal surface constitutes an extension of the load-bearing pillow toward the gum direction. At the same time, the distance between the load-bearing pillow and the crown surface in the horizontal direction is different, thereby forming an inclined structure. The extension of the corresponding load-bearing pillow toward the gum direction has a gap with the gingival margin and the gum, that is, the outer bevel of the crown has a gap with the gingival margin and the gum; the load-bearing surface can be selected from any one of the outer bevel of the crown and the mesial / distal surface;

[0077] Furthermore, the outer bevel of the crown is preferably the one with the largest contact area with the matching braces; because the outer bevel of the crown faces the direction of the oral vestibule, the gingival side and the back side are all smooth arc surfaces, it is more convenient to wear, comfortable to wear and conducive to oral hygiene maintenance. It is suitable for situations where the retention force needs to be reduced and the required vertical upward force is small, and no force couple needs to be applied to the teeth.

[0078] In order to better illustrate the present invention and provide a preferred technical solution for reference, the load-bearing pillow is a trihedron structure, including a crown surface, a crown outer spherical surface, and a spherical surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck;

[0079] The outer spherical surface of the crown faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the crown surface, and the gingival edge is adjacent to the gingival surface; the gingival surface is adjacent to the crown surface and faces the gingival side of the crown;

[0080] The outer spherical surface of the crown is in an arc shape and constitutes the extension of the load-bearing pillow toward the gum direction. At the same time, its mesial and distal edges are adjacent to the crown surface, and there is a gap between the extension of the corresponding load-bearing pillow toward the gum direction and the gingival margin and the gum, that is, there is a gap between the outer spherical surface of the crown and the gingival margin and the gum; the load-bearing surface can be selected from any one of the outer spherical surface of the crown and the spherical surface;

[0081] Furthermore, the outer spherical surface of the crown is preferably the one with the largest contact area with the matching braces; because the outer spherical surface of the crown facing the oral vestibule, gingival, distal and mesial directions are all smooth arc surfaces, it is more convenient to wear, comfortable to wear and conducive to oral hygiene maintenance. It is suitable for situations where the retention force needs to be reduced and the required mesiodistal upward force is small, and there is no need to apply a force couple to the teeth.

[0082] It should be noted that the above-mentioned trihedron structure is based on the heptahedron structure, that is, the five non-crown surfaces of the heptahedron structure are mainly merged into arc surfaces to form additional technical effects or structural improvements.

[0083] Generally speaking, load-bearing pillows of different shapes can be used according to the clinically required tooth movement method and force characteristics to achieve the effect of applying different forces to different teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] Figure 1 The schematic diagram of the structure of a combined invisible orthodontic appliance with adjustable torque direction and magnitude in Embodiment 1 of the present invention. In the figure, the dotted line portion is the contour curve of the teeth in the matching braces.

[0085] Figure 2 This is a schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 1 of the present invention. In the figure, for the convenience of display, the outlines of the molars and gums are shown by thin black lines and dotted lines, and the same applies below.

[0086] Figure 3 This is a front view structural diagram of the bearing pillow located on the molar in Example 1 of the present invention. In the figure, for the convenience of display, the matching braces are omitted, and the outlines of the molars and gums are shown by thin black lines and dotted lines except for the bearing pillow, and the same applies below.

[0087] Figure 4 Schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 2 of the present invention.

[0088] Figure 5 This is a schematic diagram of the structure of the load-bearing pillow located on the molars from a frontal perspective in Example 2 of the present invention.

[0089] Figure 6 Schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 3 of the present invention.

[0090] Figure 7 This is a schematic diagram of the structure of the load-bearing pillow located on the molars from a frontal perspective in Example 3 of the present invention.

[0091] Figure 8 Schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 4 of the present invention.

[0092] Fig. 9 This is a schematic diagram of the structure of the load-bearing pillow located on the molars from a frontal perspective in Example 4 of the present invention.

[0093] Fig.10 Schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 5 of the present invention.

[0094] Fig.11 This is a schematic diagram of the structure of the load-bearing pillow located on the molars from a frontal perspective in Example 5 of the present invention.

[0095] Fig.12 Schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 6 of the present invention.

[0096] Fig.13 This is a schematic diagram of the structure of the load-bearing pillow located on the molars from a frontal perspective in Example 6 of the present invention.

[0097] Fig.14 Schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 7 of the present invention.

[0098] Fig.15 This is a schematic diagram of the structure of the load-bearing pillow located on the molars from a frontal perspective in Example 7 of the present invention.

[0099] Fig.16 Schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 8 of the present invention.

[0100] Fig.17 This is a schematic diagram of the structure of the load-bearing pillow located on the molars from a frontal perspective in Example 8 of the present invention.

[0101] Fig.18 Schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 9 of the present invention.

[0102] Fig.19 This is a schematic diagram of the structure of the load-bearing pillow located on the molars from a frontal perspective in Example 9 of the present invention.

[0103] Fig. 20 Schematic diagram of the structure of the combined invisible orthodontic appliance located on the molars in Example 10 of the present invention.

[0104] Fig.21 This is a schematic diagram of the structure of the load-bearing pillow located on the molars in Example 10 of the present invention from a frontal perspective.

[0105] In the figure, 1 is the load-bearing pillow, 2 is the matching braces, 3 is the impedance center, 4 is the crown surface, 5 is the gingival surface, 6 is the lateral gingival surface, 7 is the apical surface, 8 is the lateral crown surface, 9 is the mesial surface, 10 is the lateral crown oblique surface, and 11 is the lateral crown spherical surface. DETAILED DESCRIPTION

[0106] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the invention. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve it. It is particularly important to point out that all similar replacements and modifications are obvious to those skilled in the art, and they are all deemed to be included in the present invention. The methods and applications of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0107] Example 1

[0108] like Figure 2 , 3 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0109] The load-bearing pillow 1 is a heptahedron structure, including a crown surface 4, a gingival surface 5, a gingival outer surface 6, a gingival surface 7, a crown outer surface 8, a mesial surface 9, and a distal surface; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0110] The gingival surface 5 faces the gingival mucosa, is adjacent to the crown surface 4 and is located on the gingival side of the crown surface 4; the gingival lateral surface 6 faces the oral vestibule mucosa or the palate / lingual mucosa, is adjacent to the gingival surface 5 and is located on the outside of the gingival surface 5; the apical surface 7 is adjacent to the crown surface 4 and faces the apical side of the crown; the crown lateral surface 8 faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival lateral surface 6, and its apical edge is adjacent to the apical surface 7; the mesial surface 9 faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface 4, the gingival surface 5, the gingival lateral surface 6, the apical surface 7 and the crown lateral surface 8 respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface 4, the gingival surface 5, the gingival lateral surface 6, the apical surface 7 and the crown lateral surface 8 respectively;

[0111] The mesial surface 9 and the distal surface are load-bearing surfaces, and the load-bearing surfaces extend to the periphery of the gums, and there is a gap between the extending portion of the corresponding load-bearing pillow 1 toward the gums and the gingival margin and the gums, that is, there is a gap between the gingival surface 5 and the gingival margin and the gums; the gingival surface 5, the gingival outer surface 6, the gingival surface 7, and the crown outer surface 8 are non-load-bearing surfaces;

[0112] The mesial surface 9 and the distal surface are planar pentagonal shapes, respectively perpendicular to the crown neck surface, so as to apply an additional force couple to the tooth in the mesial and distal directions to obtain a larger force couple to achieve overall movement of the tooth or control root movement.

[0113] In order to facilitate the overall display of the combined invisible orthodontic appliance of this embodiment with adjustable torque direction and magnitude, as shown in FIG. Figure 1 As shown, it is a schematic diagram of the structure when multiple load-bearing pillows are fixed on different teeth.

[0114] Example 2

[0115] like Figure 4 , 5 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0116] The load-bearing pillow 1 is a heptahedron structure, including a crown surface 4, a gingival surface 5, a gingival outer surface 6, a gingival surface 7, a crown outer surface 8, a mesial surface 9, and a distal surface; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0117] The gingival surface 5 faces the gingival mucosa, is adjacent to the crown surface 4 and is located on the gingival side of the crown surface 4; the gingival lateral surface 6 faces the oral vestibule mucosa or the palate / lingual mucosa, is adjacent to the gingival surface 5 and is located on the outside of the gingival surface 5; the apical surface 7 is adjacent to the crown surface 4 and faces the apical side of the crown; the crown lateral surface 8 faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival lateral surface 6, and its apical edge is adjacent to the apical surface 7; the mesial surface 9 faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface 4, the gingival surface 5, the gingival lateral surface 6, the apical surface 7 and the crown lateral surface 8 respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface 4, the gingival surface 5, the gingival lateral surface 6, the apical surface 7 and the crown lateral surface 8 respectively;

[0118] When the gingival outer surface 6 is a load-bearing surface, the load-bearing surface extends to the periphery of the gums, and there is a gap between the extension portion of the corresponding load-bearing pillow 1 toward the gums and the gingival margin and the gums, that is, there is a gap between the gingival surface 5 and the gingival margin and the gums; the gingival surface 5, the gingival surface 7, the crown outer surface 8, the mesial surface 9, and the distal surface are non-load-bearing surfaces; the angle between the gingival outer surface 6 and the gingival plane is 0-40°, so as to facilitate the application of an elongation force to the teeth and facilitate the vertical upward control of the crown;

[0119] When the gingival surface 7 is the load-bearing surface, the load-bearing surface extends to the periphery of the gums, and the corresponding extension part of the load-bearing pillow 1 toward the gums has a gap with the gingival margin and the gums, that is, the gingival surface 5 has a gap with the gingival margin and the gums; the gingival surface 5, the gingival outer surface 6, the crown outer surface 8, the mesial surface 9, and the distal surface are non-load-bearing surfaces; the angle between the gingival surface 7 and the gingival plane is 0~40°, so as to facilitate the application of a downward force to the teeth and to facilitate the vertical upward control of the crown.

[0120] Example 3

[0121] like Figure 6 , 7 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0122] The load-bearing pillow 1 is a hexahedral structure, including a crown surface 4, a gingival surface 5, a gingival surface 7, a crown lateral surface 8, a mesial surface 9, and a distal surface; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0123] The gingival surface 5 faces the gingival direction of the crown, is adjacent to the crown surface 4 and is located on the gingival side of the crown surface 4; the apical surface 7 is adjacent to the crown surface 4 and faces the apical side of the crown; the crown lateral side 8 faces the oral vestibule mucosa or the palate / tongue mucosa, and its gingival edge is adjacent to the gingival surface 5, and its apical edge is adjacent to the apical surface 7; the mesial surface 9 faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface 4, the gingival surface 5, the apical surface 7 and the crown lateral side 8 respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface 4, the gingival surface 5, the apical surface 7 and the crown lateral side 8 respectively;

[0124] The gingival surface 5 is in an arc shape, and there is a gap between the extension part of the corresponding load-bearing pillow 1 toward the gingival direction and the gingival margin and the gingiva, that is, there is a gap between the gingival surface 5 and the gingival margin and the gingiva; the load-bearing surface can be selected from any one or more of the gingival surface 5, the gingival surface 7, the outer crown surface 8, the mesial surface 9, and the distal surface.

[0125] Example 4

[0126] like Figure 8 , 9 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0127] The load-bearing pillow 1 is a hexahedral structure, including a crown surface 4, a gingival surface 5, a gingival surface 7, a crown lateral surface 8, a mesial surface 9, and a distal surface; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0128] The gingival surface 5 faces the gingival mucosa, is adjacent to the crown surface 4 and is located on the gingival side of the crown surface 4; the apical surface 7 is adjacent to the crown surface 4 and faces the apical side of the crown; the crown lateral side 8 faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival surface 5, and its apical edge is adjacent to the apical surface 7; the mesial surface 9 faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface 4, the gingival surface 5, the apical surface 7 and the crown lateral side 8 respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface 4, the gingival surface 5, the apical surface 7 and the crown lateral side 8 respectively;

[0129] The outer side surface 8 of the crown is in an arc shape, and there is a gap between the extension part of the corresponding load-bearing pillow 1 toward the gum direction and the gingival margin and the gum, that is, there is a gap between the gingival surface 5 and the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the gingival surface 5, the gingival surface 7, the outer side surface 8 of the crown, the mesial surface 9, and the distal surface;

[0130] The outer side surface 8 of the crown is the surface with the largest contact area with the matching braces 2; this makes it easier to take off and put on the braces. It is suitable for situations where the retention force needs to be reduced and the required buccal-lingual or labio-lingual force couple value is small, there is no need to apply elongation force to the teeth or there is no need to use the teeth as support to depress adjacent teeth.

[0131] Example 5

[0132] like Fig.10 , 11 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0133] The load-bearing pillow 1 is a hexahedral structure, including a crown surface 4, a gingival surface 5, a gingival outer surface 6, a crown outer surface 8, a mesial surface 9, and a distal surface; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0134] The gingival surface 5 faces the gingival mucosa, is adjacent to the crown surface 4 and is located on the gingival side of the crown surface 4; the gingival lateral surface 6 faces the oral vestibule mucosa or the palate / lingual mucosa, is adjacent to the gingival surface 5 and is located on the outside of the gingival surface 5; the crown lateral surface 8 faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival lateral surface 6, and its lateral edge is adjacent to the crown surface 4; the mesial surface 9 faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface 4, the gingival surface 5, the gingival lateral surface 6 and the crown lateral surface 8 respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface 4, the gingival surface 5, the gingival lateral surface 6 and the crown lateral surface 8 respectively;

[0135] The outer side surface 8 of the crown is in an arc shape, and there is a gap between the extension part of the corresponding load-bearing pillow 1 toward the gum direction and the gingival margin and the gum, that is, there is a gap between the gingival surface 5 and the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the gingival surface 5, the outer side surface 6 of the gum, the outer side surface 8 of the crown, the mesial surface 9, and the distal surface;

[0136] The outer side surface 8 of the crown is the surface with the largest contact area with the matching braces 2; this makes it easier to wear and take off the braces. It is suitable for situations where the mesio-distal force couple value required for tooth movement is small, the buccal-lingual or labio-lingual force couple value required is small, and the teeth need to be elongated or used as anchor teeth to depress adjacent teeth.

[0137] Example 6

[0138] like Fig.12 , 13 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0139] The load-bearing pillow 1 is a pentahedral structure, including a crown surface 4, a gingival surface 5, a crown lateral surface 8, a mesial surface 9, and a distal surface; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0140] The gingival surface 5 faces the gingival mucosa, is adjacent to the crown surface 4 and is located on the gingival side of the crown surface 4; the crown lateral surface 8 faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival surface 5, and its lateral edge is adjacent to the crown surface 4; the mesial surface 9 faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface 4, the gingival surface 5 and the crown lateral surface 8 respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface 4, the gingival surface 5 and the crown lateral surface 8 respectively;

[0141] The outer side surface 8 of the crown is in an arc shape, and there is a gap between the extension part of the corresponding load-bearing pillow 1 toward the gum direction and the gingival margin and the gum, that is, there is a gap between the gingival surface 5 and the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the gingival surface 5, the outer side surface 8 of the crown, the mesial surface 9, and the distal surface;

[0142] The outer side surface 8 of the crown is the surface with the largest contact area with the matching brace 2; because the outer side surface 8 of the crown is a smooth arc surface facing the oral vestibule and the back, it is more convenient to wear and comfortable to wear. It is suitable for situations where the retention force needs to be reduced and the mesio-distal force couple required for tooth movement is small, there is no need to apply buccolingual or labio-lingual force couple to the teeth, there is no need to apply elongation force to the teeth, or there is no need to use the teeth as support to depress adjacent teeth.

[0143] Example 7

[0144] like Fig.14 , 15 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0145] The load-bearing pillow 1 is a pentahedral structure, including a crown surface 4, a crown lateral surface 8, a camber surface 7, a mesial surface 9, and a distal surface; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0146] The crown outer side surface 8 faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the crown surface 4, and its gingival edge is adjacent to the gingival surface 7; the gingival surface 7 is adjacent to the crown surface 4 and faces the gingival side of the crown; the mesial surface 9 faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface 4, the gingival surface 7 and the crown outer side surface 8 respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface 4, the gingival surface 7 and the crown outer side surface 8 respectively;

[0147] The outer side surface 8 of the crown is in an arc shape and together with the mesial surface 9 and the distal surface, constitutes an extension of the load-bearing pillow toward the gum direction. The extension of the corresponding load-bearing pillow 1 toward the gum direction has a gap with the gingival margin and the gum, that is, the outer side surface 8 of the crown has a gap with the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the outer side surface 8 of the crown, the distal surface 7, the mesial surface 9, and the distal surface;

[0148] The outer side surface 8 of the crown is the surface with the largest contact area with the matching braces 2; because the outer side surface 8 of the crown is a smooth arc surface facing the oral vestibule and the gums, it is more convenient to wear and is beneficial to oral hygiene maintenance. It is suitable for situations where the retention force needs to be reduced and the mesiodistal force couple value required for tooth movement is small, the required vertical upward force is small, and there is no need to apply buccolingual or labiolingual force couples to the teeth.

[0149] Example 8

[0150] like Fig.16 , 17 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0151] The bearing pillow 1 is a tetrahedral structure, including a crown surface 4, a crown outer surface 8, a mesial surface 9, and a distal surface; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0152] The crown outer side surface 8 faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge and lateral edge are adjacent to the crown surface 4 respectively; the mesial surface 9 faces the mesial direction of the tooth, and is adjacent to the crown surface 4 and the mesial edge of the crown outer side surface 8 respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edge of the crown surface 4 and the crown outer side surface 8 respectively;

[0153] The outer side surface 8 of the crown is in an arc shape and together with the mesial surface 9 and the distal surface, constitutes an extension of the load-bearing pillow toward the gum direction. The extension of the corresponding load-bearing pillow 1 toward the gum direction has a gap with the gingival margin and the gum, that is, the outer side surface 8 of the crown has a gap with the gingival margin and the gum; the load-bearing surface can be selected from any one or more of the outer side surface 8 of the crown, the mesial surface 9, and the distal surface;

[0154] The outer side surface 8 of the crown is the surface with the largest contact area with the matching braces 2; because the outer side surface 8 of the crown is a smooth arc surface facing the oral vestibule, the gingival side and the back side, it is more convenient to wear, comfortable to wear and conducive to oral hygiene maintenance. It is suitable for situations where the retention force needs to be reduced and the mesiodistal force couple value required for tooth movement is small, the required vertical upward force is small, and there is no need to apply buccolingual or labiolingual force couples to the teeth.

[0155] Example 9

[0156] like Fig.18 , 19 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0157] The bearing pillow 1 is a trihedral structure, including a crown surface 4, an outer crown bevel 10, and a distal surface; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0158] The outer bevel surface 10 of the crown faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge and posterior edge are adjacent to the crown surface 4 respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the crown surface 4 and the distal edge of the outer bevel surface 10 of the crown respectively;

[0159] The outer crown bevel 10 is in an arc shape and together with the distal surface constitutes the extension of the load-bearing pillow toward the gum direction. At the same time, the distance between it and the crown surface 4 in the horizontal direction is different, thereby forming an inclined structure. The extension of the corresponding load-bearing pillow 1 toward the gum direction has a gap with the gingival margin and the gum, that is, the outer crown bevel 10 has a gap with the gingival margin and the gum; the load-bearing surface can be selected from any one of the outer crown bevel 10 and the distal surface;

[0160] The outer bevel 10 of the crown is the surface with the largest contact area with the matching braces 2; because the outer bevel 10 of the crown is smooth arc surfaces facing the oral vestibule, the gingival side and the back side, it is more convenient to wear, comfortable to wear and conducive to oral hygiene maintenance. It is suitable for situations where the retention force needs to be reduced and the required vertical upward force is small, and no force couple needs to be applied to the teeth.

[0161] Example 10

[0162] like Fig. 20 , 21 As shown, the embodiment of the present invention is a combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, which mainly comprises a bearing pillow 1 for fixing on the surface of the tooth crown and a matching brace 2 for covering the tooth and the bearing pillow.

[0163] The bearing pillow 1 is a trihedron structure, including a crown surface 4, a crown outer spherical surface 11, and a convex surface 7; the crown surface 4 is a bonding surface, and is fixed in the area of ​​1 / 2 of the crown neck as shown in the figure;

[0164] The outer spherical surface 11 of the crown faces the oral vestibule mucosa or the palate / tongue mucosa, and its gingival edge is adjacent to the crown surface 4, and its lateral edge is adjacent to the lateral surface 7; the lateral surface 7 is adjacent to the crown surface 4 and faces the lateral side of the crown;

[0165] The outer spherical surface 11 of the crown is in an arc shape and constitutes the extension of the load-bearing pillow toward the gum direction. At the same time, its mesial and distal edges are adjacent to the crown surface 4, and there is a gap between the extension of the corresponding load-bearing pillow 1 toward the gum direction and the gingival margin and the gum, that is, there is a gap between the outer spherical surface 11 of the crown and the gingival margin and the gum; the load-bearing surface can be selected from any one of the outer spherical surface 11 of the crown and the gingival margin 7;

[0166] The outer spherical surface 11 of the crown is the surface with the largest contact area with the matching braces 2; because the outer spherical surface 11 of the crown is a smooth arc surface facing the oral vestibule, gingival, distal and mesial sides, it is more convenient to wear, comfortable to wear and conducive to oral hygiene maintenance. It is suitable for situations where the retention force needs to be reduced and the required mesiodistal upward force is small, and no force couple needs to be applied to the teeth.

[0167] In the above embodiments 1 to 10, the bonding surface is a surface used for bonding and fixing with the surface of the tooth crown, the load-bearing surface is a surface on which the matching braces exert a force on the load-bearing pillow, and the torque direction of the applied force is the same as the vertical direction of the load-bearing surface; the structural surface that is neither a load-bearing surface nor a bonding surface is a non-load-bearing surface;

[0168] The force applied by the paired braces to the load-bearing pillow is based on the elastic deformation force of the paired braces themselves;

[0169] The impedance center 3 of the tooth is also marked in the corresponding figure.

[0170] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A combined invisible orthodontic appliance capable of adjusting the direction and magnitude of torque, characterized in that It includes a bearing pillow for fixing on the surface of the tooth crown and a matching brace for covering the tooth and the bearing pillow. The load-bearing pillow is a polyhedral structure, and the surfaces constituting the polyhedral structure include a bonding surface and a load-bearing surface. The bonding surface is a surface used for bonding and fixing with the surface of the tooth crown, and the load-bearing surface is a surface on which the matching braces exert a force on the load-bearing pillow, and the torque direction of the applied force is the same as the vertical direction of the load-bearing surface; therefore, the combined invisible orthodontic appliance can exert a directional torque on the teeth by exerting a force on the load-bearing pillow, so as to realize the rotation and / or movement of the teeth; The load-bearing pillow is fixed in the 1 / 2 area of ​​the crown neck, and the 1 / 2 area of ​​the crown neck refers to the 1 / 2 area close to the gingival side after the clinical crown is divided into two equal parts in height; The number of bearing surfaces of the bearing pillow is not more than 6, or the bearing pillow is a polyhedral structure with 3 to 8 faces; The force applied by the paired braces to the load-bearing pillow is based on the elastic deformation force of the paired braces themselves.

2. The combined invisible orthodontic appliance according to claim 1, characterized in that: The load-bearing surface is in a plane shape or an arc shape.

3. The combined invisible orthodontic appliance according to claim 1, characterized in that: The polyhedral structure of the load-bearing pillow also includes a non-load-bearing surface.

4. The combined invisible brace appliance according to claim 1, characterized in that: When the load-bearing pillow is fixed on the neck of the crown, its load-bearing surface extends to the gingival margin or the periphery of the gums, and the projection of the geometric center of the load-bearing surface on the crown reaches the neck of the crown, the gingival margin or the gums, so that the applied force on the load-bearing surface is close to the impedance center of the tooth.

5. The combined invisible brace appliance according to claim 4, characterized in that: A portion of the load-bearing pillow extending toward the gum has a gap with the gum margin and / or the gum.

6. The combined invisible brace appliance according to claim 4, characterized in that: When the load-bearing pillow is fixed in the area of ​​1 / 2 of the crown neck, its load-bearing surface extends to the gingival margin or the periphery of the gingiva, and the extension portion of the corresponding load-bearing pillow toward the gingiva does not exceed 3 mm.

7. The combined invisible brace appliance according to claim 1, characterized in that: When the load-bearing pillow is fixed to the surface of the crown, the thickness in the labial / buccal-lingual direction does not exceed 3 mm, and the thickness in the labial / buccal-lingual direction is not less than 0.5 mm.

8. The combined invisible brace appliance according to claim 1, characterized in that: The load-bearing pillow is a heptahedron structure, including a crown surface, a gingival surface, a gingival lateral surface, a gingival lateral surface, a crown lateral surface, a mesial surface, and a distal surface; the crown surface is a bonding surface and is fixed in the area of ​​1 / 2 of the crown neck; The gingival surface faces the gingival mucosa, is adjacent to the crown surface and is located on the gingival side of the crown surface; the gingival lateral side faces the oral vestibule mucosa or the palate / lingual mucosa, is adjacent to the gingival surface and is located on the outside of the gingival surface; the apical surface is adjacent to the crown surface and faces the apical side of the crown; the crown lateral side faces the oral vestibule mucosa or the palate / lingual mucosa, and its gingival edge is adjacent to the gingival lateral side, and its apical edge is adjacent to the apical surface; the mesial surface faces the mesial direction of the tooth, and is adjacent to the mesial edges of the crown surface, the gingival surface, the gingival lateral side, the apical surface and the crown lateral side, respectively; the distal surface faces the distal direction of the tooth, and is adjacent to the distal edges of the crown surface, the gingival surface, the gingival lateral side, the apical surface and the crown lateral side, respectively; or, The load-bearing pillow is a hexahedral structure, and the two non-crown surfaces of the heptahedral structure are combined into a curved surface; or, The load-bearing pillow is a pentahedral structure, and the three non-crown surfaces of the heptahedral structure are combined into an arc surface; or, The load-bearing pillow is a tetrahedron structure, and the four non-crown surfaces of the heptahedron structure are combined into an arc surface; or, The load-bearing pillow is a trihedron structure, and the five non-crown surfaces of the heptahedron structure are combined into an arc surface.

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