A magnetic traction device for high-impacted maxillary central incisor

Abstract

The present invention relates to the technical field of oral orthodontics, and in particular to a magnetic traction device for high-impacted maxillary central incisors, comprising a first magnet assembly, a second magnet assembly, and a support assembly, wherein the first magnet assembly is arranged on the labial and lingual surfaces of the crown of the high-impacted maxillary central incisor; the support assembly is arranged in the middle of the teeth on the mesiodistal side of the high-impacted maxillary central incisor and is fixedly connected to the adjacent teeth on the mesiodistal side of the high-impacted maxillary central incisor; the second magnet assembly is arranged on a side of the support assembly close to the first magnet assembly (the second magnet assembly and the first magnet assembly are attracted to each other) and is connected to the support assembly; the support assembly is used to support the second magnet assembly and allow the second magnet assembly to adjust its position along the length, width, and axial directions of the support assembly. The traction device is non-contact traction when in use, which can avoid mucosal damage; the direction of magnetic traction can be automatically adjusted, and the stability of the traction force is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oral orthodontics, in particular to a magnetic traction device for high-position impacted maxillary central incisors. Background Art

[0002] High impacted maxillary central incisors refer to high impacted maxillary central incisors caused by physical obstructions, eruption path deviation or other factors. Oral surgery window surgery combined with orthodontic traction is required to correct the eruption path, incorporate the impacted teeth into the dental arch and align them. The existing technology mostly uses a combination of adhesive brackets or accessories and elastic elements to guide the impacted teeth to move along a predetermined path by applying continuous corrective force. A typical implementation plan is: expose the impacted teeth during oral surgery window surgery, bond orthodontic brackets or accessories to the labial and lingual surfaces of the crown, and use an elastic traction component to connect the brackets / accessories to the fixed appliance anchorage unit. This technology has the following clinical limitations: 1) Mucosal friction stimulation: The sharp edge of the bracket forms a dynamic friction interface with the alveolar mucosa, which can easily induce local soft tissue mechanical damage (such as mucosal redness and swelling, traumatic ulcers, etc.); 2) Inefficient mechanical regulation: The connection position between the elastic element and the fixed appliance anchorage unit needs to be frequently replaced to adjust the vector direction and traction force, resulting in prolonged chairside operation time and reduced treatment efficiency; 3) Mechanical stability defects: The elastic element is prone to aging, stress relaxation, and attenuation, making it difficult to maintain a precise three-dimensional force direction, affecting the controllability of tooth movement and even posing the risk of secondary window surgery.

[0003] Therefore, it is very important to provide a technical solution that can solve the above technical problems. Summary of the Invention

[0004] To address the above-mentioned issues, the present invention provides a magnetic traction device for high-impacted maxillary central incisors. This traction device provides non-contact traction, strong controllability, and ease of operation, avoiding mucosal damage and improving patient comfort. The direction of magnetic traction can be automatically adjusted by the magnet layout, reducing the number of steps required. The traction force is more stable, and the traction force attenuation rate is significantly better than that of elastic traction.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] The present invention provides a magnetic traction device for high-position impacted maxillary central incisor, comprising a support assembly, a first magnet assembly, and a second magnet assembly.

[0007] The first magnet assembly is arranged on the labial and lingual tooth surface of the crown of the high impacted maxillary central incisor; the support assembly is arranged in the middle of the teeth on the mesiodistal side of the high impacted maxillary central incisor, and is fixedly connected to the adjacent teeth on the mesiodistal side of the high impacted maxillary central incisor; the second magnet assembly is arranged on a side of the support assembly close to the first magnet assembly, and is connected to the support assembly;

[0008] The support assembly is used to support the second magnet assembly and allow the second magnet assembly to be adjusted in position along the length and width directions of the support assembly;

[0009] The first magnet assembly and the second magnet assembly have opposite magnetic properties on the sides adjacent to each other.

[0010] In one embodiment of the present invention, the support assembly includes a basic support plate and an auxiliary support plate;

[0011] The end of the basic support plate is fixedly connected to the tooth adjacent surface on the mesiodistal side of the high impacted maxillary central incisor through the support frame, and a first guide rail is provided on the side of the basic support plate close to the high impacted maxillary central incisor along its length direction (coronal direction of the high impacted maxillary central incisor) (the first guide rail allows the auxiliary support plate to be driven to move along the length direction of the basic support plate);

[0012] The bottom of the auxiliary support plate is provided with a first sliding groove adapted to the first guide rail, allowing the auxiliary support plate to adjust its position relative to the basic support plate along the first guide rail;

[0013] The auxiliary support plate is provided with a second guide rail movably connected to the second magnet assembly along its width direction on one side close to the high-position impacted maxillary central incisor (the second guide rail allows the second magnet assembly to move along the width direction of the basic support plate).

[0014] In one embodiment of the present invention, the base support plate and the support frame are movably connected via a ball joint;

[0015] The setting of the ball joint allows the basic support plate to rotate axially along the support frame, further realizing the adjustment of the angle of the second magnet assembly (the ball joint allows the adjustment of the angle of the basic support plate relative to the support frame, that is, allows the basic support plate to rotate along the support frame, further realizing the adjustment of the angle between the second magnet assembly and the first magnet assembly).

[0016] In one embodiment of the present invention, the support frame is bonded to the teeth on the mesiodistal side of the high impacted maxillary central incisor.

[0017] In one embodiment of the present invention, the first guide rail is provided with a plurality of first holes, and the auxiliary support plate is provided with a plurality of second holes adapted to the first holes;

[0018] The first hole and the second hole are used to fix the auxiliary support plate relative to the basic support plate through the first positioning pin.

[0019] In one embodiment of the present invention, the spacings between adjacent first holes are the same or different;

[0020] Preferably, the intervals between adjacent first holes are the same.

[0021] In one embodiment of the present invention, the first positioning pin is in an inverted "L" shape and includes a first vertical positioning rod and a first horizontal positioning rod;

[0022] The first vertical positioning rod extends out of the second hole and the first hole in sequence, and the first transverse positioning rod is used to limit the first vertical positioning rod.

[0023] In one embodiment of the present invention, the length of the first vertical positioning rod is greater than the depth of the second hole and less than or equal to the sum of the depths of the first hole and the second hole.

[0024] In one embodiment of the present invention, a plurality of third holes are provided on the second guide rail, and a plurality of fourth holes matching the third holes are provided on the second magnet assembly;

[0025] The third hole and the fourth hole are used to fix the second magnet assembly relative to the auxiliary support plate through the second positioning pin.

[0026] In one embodiment of the present invention, the spacings between adjacent third holes are the same or different;

[0027] Preferably, the intervals between adjacent third holes are the same.

[0028] In one embodiment of the present invention, the second positioning pin is in an inverted "L" shape and includes a second vertical positioning rod and a second horizontal positioning rod;

[0029] The second vertical positioning rod extends out of the fourth hole and the third hole in sequence, and the second transverse positioning rod is used to limit the second vertical positioning rod.

[0030] In one embodiment of the present invention, the length of the second vertical positioning rod is greater than the depth of the fourth hole and less than or equal to the sum of the depths of the third hole and the fourth hole.

[0031] In one embodiment of the present invention, the material of the first positioning pin and the second positioning pin is ensured to be non-magnetic (such as resin) and does not affect the attraction between the second magnet assembly and the first magnet assembly.

[0032] In one embodiment of the present invention, the upper surface and / or side surfaces of the first guide rail are provided with first scale lines for easy positioning, and the upper surface and / or side surfaces of the second guide rail are provided with second scale lines for easy positioning.

[0033] In one embodiment of the present invention, the first scale line and the second scale line are used to implement positioning monitoring of the second magnet assembly;

[0034] The first scale line takes the end away from the high-positioned impacted maxillary central incisor during treatment as the zero scale point, and the second scale line takes the end close to the labial side during treatment as the zero scale point (it can also be reasonably adjusted according to actual conditions).

[0035] In one embodiment of the present invention, the first magnet assembly includes a first magnet and an adhesive member;

[0036] The adhesive is arranged on the side of the first magnet close to the labial and lingual surface of the crown of the high-position impacted maxillary central incisor, and is used to achieve bonding and fixation of the first magnet and the high-position impacted maxillary central incisor.

[0037] In one embodiment of the present invention, the width of the first magnet is 2-3 mm, and the length is the same as the width of the labial and lingual surface of the crown of the high-positioned impacted maxillary central incisor.

[0038] In one embodiment of the present invention, the second magnet assembly includes a bottom magnet, a middle magnet, and a top magnet that are stacked;

[0039] The bottom surface of the bottom magnet is connected to the top magnet and the upper surface of the auxiliary support plate;

[0040] The magnetism of the top magnet away from the middle magnet is opposite to the magnetism of the first magnet away from the labial and lingual surface of the crown of the high-position impacted maxillary central incisor.

[0041] In actual use, the appropriate suction force can be obtained by adjusting the relative distance between the top magnet and the first magnet, or by adjusting the material and size of the magnet (for example, adjusting the suction force between the top magnet and the first magnet to 50g~150g).

[0042] In one embodiment of the present invention, the total thickness of the bottom magnet, the middle magnet, and the top magnet is 6-8 mm, and the width is 2-3 mm.

[0043] In one embodiment of the present invention, the upper surface of the auxiliary support plate is flat, the lower surface of the bottom magnet is provided with a second slide groove adapted to the second guide rail, and the bottom magnet is provided with a fourth hole adapted to the third hole;

[0044] The upper surface of the bottom magnet allows or does not allow the first protrusion to be set. When the first protrusion is set, the lower surface of the middle magnet is provided with a first groove adapted to the first protrusion. The upper surface of the middle magnet allows or does not allow the second protrusion to be set. When the second protrusion is set, the lower surface of the top magnet is provided with a second groove adapted to the second protrusion. The upper surface of the top magnet is a plane.

[0045] In one embodiment of the present invention, more than one first protrusion is provided. When more than two first protrusions are provided, the intervals between adjacent first protrusions are the same or different (that is, the positions of the first protrusions can be set according to actual needs);

[0046] There is more than one second protrusion. When there are more than two second protrusions, the intervals between adjacent second protrusions are the same or different (that is, the positions of the second protrusions can be set according to actual needs).

[0047] In one embodiment of the present invention, the structure of the first protrusion is one of a cylinder, an elliptical cylinder, a prism, a cone or a special-shaped cylinder;

[0048] The second protrusion has a structure of a cylinder, an elliptical cylinder, a prism, a cone or a special-shaped cylinder.

[0049] In one embodiment of the present invention, the intermediate magnets are allowed to be stacked with more than one set (to facilitate adjustment of the relative distance between the top magnet and the first magnet);

[0050] The middle magnet is provided with a positioning piece at the end portion along the length direction thereof for easy removal and / or fixing;

[0051] The positioning member may be a groove, a protrusion or an annular hook; preferably, the positioning member is an annular hook to prevent the external clamping instrument from falling off during the removal process.

[0052] The traction process of the traction device provided by the present invention is divided into the following three stages:

[0053] 1) Initial stage: The distance between the magnets is the largest, the attraction is small, and a gentle traction force is provided;

[0054] 2) As the impacted maxillary central incisor moves downward, the number of middle magnets and the position of the second magnet assembly relative to the first magnet assembly are gradually reduced to maintain a stable traction adjustment force;

[0055] 3) In the later stage of treatment, the traction direction is further fine-tuned by fine-tuning the position of the second magnet assembly relative to the basic support plate.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] The magnetic traction device for high-position impacted maxillary central incisor of the present invention has brought revolutionary changes to the field of orthodontics with its unique design concept and advanced technical features.

[0058] First, the device utilizes a non-contact traction method, meaning no direct contact with teeth or mucosa is required during the traction process, significantly reducing patient discomfort during the correction process. The traction force is applied more gently, effectively avoiding mucosal damage and pain, ensuring a high level of patient comfort throughout the correction process. This user-friendly design concept fully considers the patient experience, making orthodontic treatment no longer a daunting experience.

[0059] Secondly, the device's magnetic pull direction can be automatically adjusted based on the magnet layout, an innovative feature that greatly simplifies the operation process. While traditional orthodontic methods often require complex steps to adjust the pull direction, the automatic adjustment function of the present invention allows medical staff to adjust the pull direction more quickly and accurately, improving correction efficiency.

[0060] In addition, the device also performs well in terms of traction stability. Compared with traditional elastic traction, the traction of this device is more stable and less susceptible to external factors. At the same time, the attenuation rate of traction is significantly lower than that of elastic traction, which means that during the correction process, patients can enjoy more lasting and uniform traction, which helps to correct the teeth smoothly.

[0061] In summary, the magnetic traction device for high-position impacted maxillary central incisor of the present invention improves the patient's comfort and the convenience of treatment while ensuring the correction effect, bringing new development opportunities to the field of dental correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 Schematic diagram of the structure of the magnetic traction device for high-position impacted maxillary central incisor in Example 1 of the present invention Figure 1 ;

[0063] Figure 2 Schematic diagram of the structure of the magnetic traction device for high-position impacted maxillary central incisor in Example 1 of the present invention Figure 2 ;

[0064] Figure 3 This is an exploded view of the second magnet assembly and the support assembly in the magnetic traction device for high-impacted maxillary central incisor in Example 1 of the present invention;

[0065] Figure 4 This is a schematic structural diagram of the base support plate in the magnetic traction device for high-position impacted maxillary central incisor according to Example 1 of the present invention;

[0066] Figure 5This is a schematic structural diagram of the auxiliary support plate in the magnetic traction device for high-impacted maxillary central incisor according to Example 1 of the present invention;

[0067] Figure 6 This is a schematic structural diagram of the first magnet assembly in the magnetic traction device for high-impacted maxillary central incisor in Example 1 of the present invention;

[0068] Figure 7 This is an exploded view of the second magnet assembly in the magnetic traction device for high-impacted maxillary central incisor according to Example 1 of the present invention;

[0069] Figure 8 Schematic diagram of the structure of the middle magnet in the magnetic traction device for high-position impacted maxillary central incisor in Example 1 of the present invention;

[0070] Figure 9 Schematic diagram of the structure of the middle magnet and the top magnet in the magnetic traction device for high-position impacted maxillary central incisor in Example 1 of the present invention;

[0071] Figure 10 This is a schematic structural diagram of the base support plate and the support frame in the magnetic traction device for high-impacted maxillary central incisor in Example 1 of the present invention;

[0072] Numbers in the figure: 1. First magnet assembly; 11. First magnet; 12. Adhesive; 2. Second magnet assembly; 21. Bottom magnet; 211. First protrusion; 212. Second slide; 213. Fourth hole; 22. Middle magnet; 221. Second protrusion; 222. First groove; 223. Positioning member; 23. Top magnet; 231. Second groove; 3. Support assembly; 31. Basic support plate; 311. First guide rail; 312. First hole; 313. First scale line; 32. Auxiliary support plate; 321. Second guide rail; 322. First slide; 323. Second hole; 324. Third hole; 325. Second scale line; 33. First locating pin; 34. Second locating pin; 35. Support frame; 36. Ball joint; 4. High-positioned impacted maxillary central incisor. DETAILED DESCRIPTION

[0073] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0074] In the present invention, the “length direction” refers to the mesiodistal diameter direction (coronal direction); the “width direction” refers to the direction perpendicular to the mesiodistal diameter (sagittal direction).

[0075] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0076] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0077] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0078] In the following embodiments, unless otherwise specified, the structures or components used are conventional structures or components in the art, as long as they can achieve the corresponding functions.

[0079] Example 1

[0080] This embodiment provides a magnetic traction device for high impacted maxillary central incisor. Figures 1 to 10 As shown, it includes a support component 3, a first magnet component 1, and a second magnet component 2. The first magnet component 1 is arranged on the labial and lingual surface of the crown of the high-position impacted maxillary central incisor 4; the support component 3 is arranged in the middle of the teeth on the mesiodistal side of the high-position impacted maxillary central incisor 4, and is fixedly connected to the adjacent surfaces of the teeth on the mesiodistal side of the high-position impacted maxillary central incisor 4; the second magnet component 2 is arranged on the side of the support component 3 close to the first magnet component 1, and is connected to the support component 3; the support component 3 is used to support the second magnet component 2, and allow the second magnet component 2 to adjust its position along the length and width directions of the support component 3; the first magnet component 1 and the second magnet component 2 are close to each other on opposite magnetic sides.

[0081] Furthermore, the support assembly 3 includes a basic support plate 31 and an auxiliary support plate 32; the end of the basic support plate 31 is fixedly connected to the adjacent tooth surface on the mesiodistal side of the high impacted maxillary central incisor 4 through a support frame 35, and the basic support plate 31 is close to the side of the high impacted maxillary central incisor 4 along its length direction (coronal direction of the high impacted maxillary central incisor 4) provided with a first guide rail 311; the bottom of the auxiliary support plate 32 is provided with a first slide groove 322 adapted to the first guide rail 311, allowing the auxiliary support plate 32 to adjust its position along the first guide rail 311; the auxiliary support plate 32 is close to the side of the high impacted maxillary central incisor 4 along its width direction provided with a second guide rail 321 movably connected to the second magnet assembly 2.

[0082] Furthermore, the basic support plate 31 is movably connected to the support frame 35 via a ball joint 36; the setting of the ball joint 36 allows the basic support plate 31 to rotate axially along the support frame 35, further realizing the adjustment of the angle of the second magnet assembly; the support frame 35 is bonded to the teeth on the mesiodistal side of the high-positioned impacted maxillary central incisor 4.

[0083] Furthermore, the first guide rail 311 is provided with a plurality of first holes 312, and the auxiliary support plate 32 is provided with a plurality of second holes 323 that match the first holes 312. The first holes 312 and the second holes 323 are fixed to the auxiliary support plate 32 relative to the base support plate 31 via first positioning pins 33. The spacing between adjacent first holes 312 may be the same or different; preferably, the spacing between adjacent first holes 312 is the same.

[0084] Furthermore, the first positioning pin 33 is in an inverted "L" shape and includes a first vertical positioning rod and a first transverse positioning rod. The first vertical positioning rod extends sequentially from the second hole 323 and the first hole 312, and the first transverse positioning rod is used to limit the position of the first vertical positioning rod. The length of the first vertical positioning rod is greater than the depth of the second hole 323 and less than or equal to the sum of the depths of the first hole 312 and the second hole 323.

[0085] Furthermore, the second guide rail 321 is provided with a plurality of third holes 324, and the second magnet assembly 2 is provided with a plurality of fourth holes 213 that match the third holes 324. The third holes 324 and the fourth holes 213 are fixed to the auxiliary support plate 32 via second positioning pins 34. The spacing between adjacent third holes 324 may be the same or different; preferably, the spacing between adjacent third holes 324 is the same.

[0086] Furthermore, the second positioning pin 34 is in an inverted "L" shape and includes a second vertical positioning rod and a second transverse positioning rod. The second vertical positioning rod extends sequentially from the fourth hole 213 and the third hole 324, and the second transverse positioning rod is used to limit the second vertical positioning rod. The length of the second vertical positioning rod is greater than the depth of the fourth hole 213 and less than or equal to the sum of the depths of the third hole 324 and the fourth hole 213.

[0087] Furthermore, the material of the first positioning pin 33 and the second positioning pin 34 is ensured to be non-magnetic (such as resin) and does not affect the attraction between the second magnet assembly 2 and the first magnet assembly 1 .

[0088] Furthermore, the upper surface and / or side of the first guide rail 311 is provided with a first scale line 313 for easy positioning, and the upper surface and / or side of the second guide rail 321 is provided with a second scale line 325 for easy positioning; the first scale line 313 and the second scale line 325 are used to realize the positioning monitoring of the second magnet assembly 2; the first scale line 313 uses the end away from the high-positioned impacted maxillary central incisor 4 as the zero scale point, and the second scale line 325 uses the end close to the labial side as the zero scale point.

[0089] Furthermore, the first magnet assembly 1 includes a first magnet 11 and an adhesive 12; the adhesive 12 is arranged on the side of the first magnet 11 close to the labial and lingual surface of the crown of the high impacted maxillary central incisor 4 (the side close to the labial and lingual surface of the crown of the high impacted maxillary central incisor 4 has the same profile and anatomical structure as the labial and lingual surface of the crown of the high impacted maxillary central incisor 4), and is used to achieve bonding and fixation of the first magnet 11 to the high impacted maxillary central incisor 4. The width and thickness of the first magnet 11 can be adjusted according to actual conditions (for example, the width is 2 to 3 mm), and the length is the same as the width of the labial and lingual surface of the crown of the high impacted maxillary central incisor 4.

[0090] Furthermore, the second magnet assembly 2 includes a bottom magnet 21, an intermediate magnet 22, and a top magnet 23 arranged in a stacked manner; the bottom surface of the bottom magnet 21 is connected to the top magnet 23 and the upper surface of the auxiliary support plate 32; the magnetism of the top magnet 23 away from the intermediate magnet 22 is opposite to the magnetism of the first magnet 11 away from the labial and lingual surface of the crown of the high-positioned impacted maxillary central incisor 4 (preferably, the suction force between the top magnet 23 and the first magnet 11 can be adjusted according to actual conditions, for example, the suction force is 50g~150g). The dimensions of the bottom magnet 21, the intermediate magnet 22, and the top magnet 23 can be adjusted according to actual conditions, for example, the total thickness of the bottom magnet 21, the intermediate magnet 22, and the top magnet 23 is 6~8mm, and the width is 2~3mm.

[0091] Furthermore, the upper surface of the auxiliary support plate 32 is a plane, the lower surface of the bottom magnet 21 is provided with a second slide groove 212 adapted to the second guide rail 321, and the bottom magnet 21 is provided with a fourth hole 213 adapted to the third hole 324; the upper surface of the bottom magnet 21 allows or does not provide a first protrusion 211 (to avoid displacement), when the first protrusion 211 is provided, the lower surface of the intermediate magnet 22 is provided with a first groove 222 adapted to the first protrusion 211 (the first protrusion 211 and the first groove The arrangement of the protrusion 222 is based on minimizing the impact on the magnetic field distribution, magnetic strength, and magnetic concentration of the magnet. The upper surface of the middle magnet 22 may or may not be provided with a second protrusion 221 (to avoid displacement). When the second protrusion 221 is provided, the lower surface of the top magnet 23 is provided with a second groove 231 that is compatible with the second protrusion 221 (the arrangement of the second protrusion 221 and the second groove 231 is based on minimizing the impact on the magnetic field distribution, magnetic strength, and magnetic concentration of the magnet). The upper surface of the top magnet 23 is a plane. There are more than one first protrusion 211. When there are more than two first protrusions 211, the spacing between adjacent first protrusions 211 is the same or different. There are more than one second protrusion 221. When there are more than two second protrusions 221, the spacing between adjacent second protrusions 221 is the same or different. The structure of the first protrusion 211 is one of a cylinder, an elliptical cylinder, a prism, a cone or a special-shaped cylinder; the structure of the second protrusion 221 is one of a cylinder, an elliptical cylinder, a prism, a cone or a special-shaped cylinder.

[0092] Furthermore, the intermediate magnets 22 are allowed to be stacked in one group or more (to facilitate adjustment of the relative distance between the top magnet 23 and the first magnet 11); the intermediate magnets 22 are provided with positioning members 223 at their ends along the length direction for easy removal and / or fixation; the positioning members 223 are allowed to be grooves, horizontal protrusions or annular hooks (to facilitate adjustment of the intermediate magnets 22 by external clamping instruments (such as tweezers)).

[0093] The traction process of the traction device provided in this embodiment is divided into the following three stages:

[0094] (S1) Initial positioning and gentle traction phase:

[0095] First, the precise three-dimensional position, impaction depth, and eruption path direction of the high-positioned impacted maxillary central incisor 4 in the jaw are determined based on preoperative imaging assessment (such as CBCT).

[0096] Furthermore, after the tooth crown is exposed by opening a window in the oral surgery, the first magnet 11 is precisely fixed to the labial and lingual surface thereof using the adhesive 12; the support frame 35 and the base support plate 31 are firmly bonded and fixed to the adjacent surfaces of the adjacent teeth in the mesiodistal direction of the impacted tooth;

[0097] Then, the multi-degree-of-freedom adjustment capability of the support assembly 3 is utilized to adjust the relative positions of the first magnet assembly 1 and the second magnet assembly 2, as follows:

[0098] The auxiliary support plate 32 is adjusted coronally along the length direction of the first guide rail 311, roughly corresponding to the high-position impacted maxillary central incisor 4, and accurately positioned in combination with the first scale line 313;

[0099] Adjust the bottom magnet 21 of the second magnet assembly 2 along the width direction of the second guide rail 321 and accurately position it in combination with the second scale line 325;

[0100] The relative position of the base support plate 31 and the support frame 35 is adjusted by the ball joint 36 , thereby accurately adjusting the relative spatial position of the second magnet assembly 2 relative to the first magnet assembly 1 .

[0101] After the adjustment is completed, the auxiliary support plate 32 is fixed relative to the base support plate 31 by the first positioning pins 33 , and the bottom magnet 21 is fixed relative to the auxiliary support plate 32 by the second positioning pins 34 .

[0102] It should be noted that at this stage, the number of groups of intermediate magnets 22 in the second magnet assembly 2 can be adjusted according to the patient's personal situation to ensure that the high-positioned impacted maxillary central incisor 4 can be pulled to the ideal position as much as possible with the cooperation of the first magnet assembly 1 and the second magnet assembly 2.

[0103] The goal of this stage is to minimize tissue resistance and avoid acute inflammatory response of the periodontal ligament, provide stable and continuous traction, and guide the high-positioned impacted maxillary central incisor 4 to begin to move safely and minimally along the preset ideal eruption path, reducing the initial force discomfort and the risk of root resorption.

[0104] (S2) Dynamic adjustment and continuous guidance stage:

[0105] As the high-positioned impacted maxillary central incisor 4 gradually moves toward the top of the alveolar ridge under magnetic traction, its spatial position and the direction and magnitude of the required traction force all change; therefore, further non-invasive dynamic tracking and adjustment are required to maintain the optimal and stable traction force vector.

[0106] Furthermore, as the high-position impacted maxillary central incisor 4 gradually moves, the distance between the first magnet 11 of the first magnet assembly 1 and the top magnet 23 of the second magnet assembly 2 on its crown naturally decreases, and the magnetic attraction will increase accordingly; in order to relatively accurately control the traction magnetic force value within the ideal treatment range (for example, the traction magnetic force value is controlled to be 100g-150g, which can be adjusted (further increased or decreased) according to actual needs) and adapt to changes in movement resistance, the number of groups of intermediate magnets 22 needs to be gradually reduced. During operation, dental tweezers and other instruments are used in conjunction with the positioning piece 223 (such as the annular hook) to safely remove part of the intermediate magnet 22, thereby providing continuous and stable traction (here, "continuous and stable" means that compared with existing traction devices, relatively continuous and stable traction can be provided in each correction stage after the adjustment is completed).

[0107] At the same time, the actual movement trajectory of the high-positioned impacted maxillary central incisor 4 is regularly evaluated through clinical examinations and imaging reviews. If the movement path deviates (such as deviating to the labial or palatal side), the multi-degree-of-freedom adjustment capability of the support component 3 is utilized to adjust the relative position of the first magnet component 1 and the second magnet component 2. The specific operation method can be referred to (S1).

[0108] It should be noted that at this stage, modular addition and removal of magnets and multi-axial guide rail positioning are used to achieve rapid chairside force control and direction correction. Due to the high natural stability and extremely low attenuation rate of magnetic force, the force applied to the high-positioned impacted maxillary central incisor 4 remains highly constant throughout the long traction process (which may last for several months). This is significantly better than elastic traction elements that are prone to aging and relaxation, avoiding treatment stagnation or frequent follow-up visits due to force attenuation. In addition, the non-contact design completely eliminates the risks of continuous friction, irritation, and damage to the moving mucosa caused by traditional bracket accessories.

[0109] (S3) Final fine-tuning and integration into the dental arch stage:

[0110] After the crown of the high-positioned impacted maxillary central incisor 4 was successfully pulled through the gingival tissue and exposed in the mouth, the treatment focus shifted to precisely guiding it to the final ideal arrangement position in the dental arch to ensure good contact with the adjacent teeth and an aesthetically pleasing axial inclination.

[0111] At this time, the crown is exposed, and the clinical visibility and operability are enhanced. The multi-degree-of-freedom adjustment capability of the support component 3 is utilized to adjust the relative position of the first magnet component 1 and the second magnet component 2 (fine-tune the end position). The specific operation method can be referred to (S1).

[0112] It should be noted that the stable rigid anchorage and millimeter- and angle-level precision adjustment provided by support assembly 3 enable precise three-dimensional manipulation of the position of the high-impacted maxillary central incisor 4 during the final stages of treatment. The continuous and stable magnetic force ensures efficient and predictable movement of the tooth to its final target position, laying a precise foundation for subsequent bonding and final alignment of the conventional fixed appliance.

[0113] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the explanations of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A magnetic traction device for high impacted maxillary central incisor, characterized in that: It comprises a first magnet assembly (1), a second magnet assembly (2), and a support assembly (3). The first magnet assembly (1) is arranged on the labial and lingual surface of the crown of the high impacted maxillary central incisor (4); the support assembly (3) is arranged in the middle of the teeth on the mesiodistal side of the high impacted maxillary central incisor (4) and is fixedly connected to the adjacent teeth on the mesiodistal side of the high impacted maxillary central incisor (4); the second magnet assembly (2) is arranged on a side of the support assembly (3) close to the first magnet assembly (1) and is connected to the support assembly (3); The support assembly (3) is used to support the second magnet assembly (2) and allows the second magnet assembly (2) to be adjusted in position along the length direction, width direction, and axial direction of the support assembly (3); The first magnet assembly (1) and the second magnet assembly (2) have opposite magnetic properties on the sides thereof that are close to each other; The support assembly (3) comprises a basic support plate (31) and an auxiliary support plate (32); The end of the basic support plate (31) is fixedly connected to the tooth adjacent surface on the mesiodistal side of the high-position impacted maxillary central incisor (4) through a support frame (35), and a first guide rail (311) is provided along the length direction of the basic support plate (31) on a side close to the high-position impacted maxillary central incisor (4); The bottom of the auxiliary support plate (32) is provided with a first sliding groove (322) adapted to the first guide rail (311), allowing the auxiliary support plate (32) to adjust its position along the first guide rail (311); A second guide rail (321) movably connected to the second magnet assembly (2) is provided along the width direction of the auxiliary support plate (32) on one side close to the high-position impacted maxillary central incisor (4); The basic support plate (31) and the support frame (35) are movably connected via a ball joint (36), allowing the basic support plate (31) to rotate axially along the support frame (35).

2. The magnetic traction device for high impacted maxillary central incisor according to claim 1, characterized in that: The first guide rail (311) is provided with a plurality of first holes (312), and the auxiliary support plate (32) is provided with a plurality of second holes (323) adapted to the first holes (312); The first hole (312) and the second hole (323) achieve fixation of the auxiliary support plate (32) relative to the basic support plate (31) via the first positioning pin (33).

3. The magnetic traction device for high impacted maxillary central incisor according to claim 2, characterized in that: The second guide rail (321) is provided with a plurality of third holes (324), and the second magnet assembly (2) is provided with a plurality of fourth holes (213) adapted to the third holes (324); The third hole (324) and the fourth hole (213) are used to fix the second magnet assembly (2) relative to the auxiliary support plate (32) via the second positioning pin (34).

4. The magnetic traction device for high impacted maxillary central incisor according to claim 3, characterized in that: The upper surface and / or side surface of the first guide rail (311) are provided with first scale lines (313) for easy positioning, and the upper surface and / or side surface of the second guide rail (321) are provided with second scale lines (325) for easy positioning.

5. The magnetic traction device for high impacted maxillary central incisor according to claim 2, characterized in that: The first magnet assembly (1) comprises a first magnet (11) and an adhesive member (12); The adhesive member (12) is arranged on a side of the first magnet (11) close to the labial and lingual surface of the crown of the high-position impacted maxillary central incisor (4), and is used to achieve bonding and fixing of the first magnet (11) and the high-position impacted maxillary central incisor (4).

6. The magnetic traction device for high impacted maxillary central incisor according to claim 5, characterized in that: The length of the first magnet (11) is the same as the width of the labial and lingual surface of the crown of the high-positioned impacted maxillary central incisor (4).

7. The magnetic traction device for high impacted maxillary central incisor according to claim 5, characterized in that: The second magnet assembly (2) comprises a bottom magnet (21), a middle magnet (22) and a top magnet (23) which are stacked; The bottom surface of the bottom magnet (21) is connected to the top magnet (23) and the upper surface of the auxiliary support plate (32); The magnetism of the top magnet (23) away from the middle magnet (22) is opposite to the magnetism of the first magnet (11) away from the labial and lingual surface of the crown of the high-positioned impacted maxillary central incisor (4).

8. The magnetic traction device for high impacted maxillary central incisor according to claim 7, characterized in that: The upper surface of the auxiliary support plate (32) is a plane, the lower surface of the bottom magnet (21) is provided with a second slide groove (212) adapted to the second guide rail (321), and the bottom magnet (21) is provided with a fourth hole (213) adapted to the third hole (324); The upper surface of the bottom magnet (21) is provided with a first protrusion (211), the lower surface of the middle magnet (22) is provided with a first groove (222) adapted to the first protrusion (211), the upper surface of the middle magnet (22) is provided with a second protrusion (221), the lower surface of the top magnet (23) is provided with a second groove (231) adapted to the second protrusion (221), and the upper surface of the top magnet (23) is a plane.

9. The magnetic traction device for high impacted maxillary central incisor according to claim 7, characterized in that: The intermediate magnet (22) allows for a stacked arrangement of one or more groups; The middle magnet (22) is provided with a positioning piece (223) at its end along the length direction for easy removal and / or fixing.

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