An appliance for reducing the length of posterior teeth and a method of using the same

Abstract

The present application relates to the technical field of dental correction, and particularly relates to a device for lowering and elongating posterior teeth and a use method thereof, comprising a first anterior tooth band ring group and a second anterior tooth band ring group, and a transverse palate bar connected between the second anterior tooth band ring group and the first anterior tooth band ring group; an empty bin is formed in the inner side wall of the first anterior tooth band ring group and the second anterior tooth band ring group; a fixing rod is arranged on both sides of the other end of the second anterior tooth band ring group, and an inner side connecting rod is arranged between the fixing rod and the inner side of the second anterior tooth band ring group. The device for lowering and elongating posterior teeth and the use method thereof have the advantages that the device for adjacent anchorage tooth area is 3D printed, the metal device has high strength, is bonded on a plurality of abutment teeth, and can limit the movement of the anchorage tooth, and the treatment force is well expressed under the cooperation of micro-implant pegs, and the treatment efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of orthodontic technology, and more particularly to an orthodontic appliance for depressing elongated posterior teeth and its method of use. Background Technology

[0002] Molars are the most important teeth in the human masticatory system. Their loss can cause changes in occlusion and even jaw position, and molars are among the most common sites for tooth loss. If a missing molar is not replaced for a long period, the opposing molar may elongate due to lack of occlusion, occupying the available vertical space for restoration and making subsequent restorative treatment difficult or even impossible. For patients with elongated opposing molars due to molar loss and insufficient restorative space, existing treatment methods include crown resection, orthodontic intrusion of the elongated molar, and surgical bone removal. Orthodontic intrusion of the elongated molar is the ideal method in clinical practice to provide sufficient vertical space for restoration. It preserves the pulp vitality of healthy teeth, has a relatively low cost, achieves ideal results, and results in minimal root resorption, which is clinically acceptable.

[0003] Current orthodontic molar intrusion methods can be categorized based on their anchorage source into dental anchorage, extraoral anchorage, micro-implant bone anchorage, and mixed anchorage. A new method combines an appliance with micro-implant anchorage to intrude molars, integrating two anchorage approaches to simultaneously intrude multiple molars and efficiently achieve overall molar intrusion using a small number of micro-implants. Summary of the Invention

[0004] Technical objective: In order to overcome the shortcomings of the existing technology, the present invention provides an orthodontic appliance for indenting posterior teeth and its method of use.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an orthodontic appliance for depressing posterior tooth elongation, comprising a first anterior tooth band group and a second anterior tooth band group, wherein a transpalatal bar is connected between the second anterior tooth band group and the first anterior tooth band group; a cavity is provided on the inner sidewall of the first anterior tooth band group and the second anterior tooth band group; fixing rods are provided on both sides of the other end of the transpalatal bar of the second anterior tooth band group, and an inner connecting rod is provided between the fixing rod and the inner side of the second anterior tooth band group.

[0006] Preferably, the two sides of the transpalatal bar are fixed to one end of the first anterior tooth band group and the second anterior tooth band group, respectively, and the inner connecting rod is fixed to the end of the inner surface of the second anterior tooth band group.

[0007] Preferably, one end of the fixing rod is provided with an expander, which is located outside the second anterior tooth band assembly. The other end of the expander is also provided with a mounting ring. The other end of the fixing rod is provided with a connecting rod, and the other end of the connecting rod is provided with a mounting ring. The positions of the two mounting rings correspond to each other.

[0008] Preferably, an outer connecting rod is provided between the other side of the second anterior tooth band assembly and the expander. The number of outer connecting rods corresponds to the number of slots on the second anterior tooth band assembly, and the other end of the outer connecting rod is fixed to one end of the expander.

[0009] Preferably, the transpalatal bar is fixed to the middle of the inner surface of the first anterior tooth band group, and an inner connecting rod is provided at the other end of the transpalatal bar, which is fixed to the end of the inner surface of the second anterior tooth band group.

[0010] Preferably, the other end of the fixing rods on both sides of the second anterior tooth band assembly is also provided with a connecting rod, and the other end of each connecting rod is provided with a mounting ring, with the positions of the two mounting rings corresponding to each other.

[0011] Method of using an orthodontic appliance to depress elongated posterior teeth:

[0012] S1, take lateral cephalometric radiographs and CBCT scans, and save the model;

[0013] S2, intraoral scan data acquisition;

[0014] S3, 3D printing of orthodontic appliances: Based on intraoral scan data, the implantation location of the anchorage screw is determined and the appliance is fabricated;

[0015] S4, the orthodontic appliance is bonded intraorally and the anchorage screw is implanted in parallel;

[0016] S5, a lingual buckle is bonded to the buccal-lingual side of the elongated tooth, and a chain-like leather band connects the lingual buckle and the orthodontic appliance.

[0017] Preferably, S1 develops an orthodontic treatment plan on the model; S2 obtains a full-mouth digital model by intraoral scanning; S3, processes the digital model using software, imports the intraoral scanning data into 3D design software, and fabricates the orthodontic appliance at the designed anchorage screw implantation location.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention provides an orthodontic appliance for reducing posterior tooth elongation and its method of use. By bonding the high-strength 3D-printed metal appliance to multiple abutment teeth in the adjacent anchorage tooth region, the movement of the anchorage teeth can be restricted. With the cooperation of micro-implants, the orthodontic force is well expressed, resulting in high orthodontic efficiency.

[0020] 2. This invention provides an orthodontic appliance for depressing elongated posterior teeth and its method of use. By bonding a lingual clip to the elongated tooth to apply force, the direction and location of the depressing can be flexibly controlled. It can achieve overall depressing of the molar without generating force in other directions. It is also applicable to situations where some elongated molars are tilted and need to be adjusted in position.

[0021] 3. This invention provides an orthodontic appliance for depressing posterior tooth elongation and its method of use. The appliance is fixedly bonded to the patient's dentition without the need for patient cooperation. The orthodontic force is continuous and stable, and the orthodontic efficiency is high. The micro-implant placement site is easy to select. Its purpose is to stabilize the anchorage dentition. It only needs to be close to the adjacent anchorage teeth to create indirect anchorage. It can be applied to the buccal and lingual sides and between multiple tooth positions.

[0022] 4. This invention provides an orthodontic appliance for intruding elongated posterior teeth and its method of use. It reduces the difficulty of finding suitable implant sites for micro-implants, allowing for implantation at sites with high bone density, sufficient bone volume, and large interroot spacing. It is also suitable for intruding the maxillary second molar and mandibular molars, where micro-implants are difficult to implant on the lingual or palatal side. Furthermore, it makes it easier to find suitable implantation sites for older patients with insufficient bone volume. There is no need to worry about unfavorable movement of elongated molars due to poor implantation angle, thus reducing the operational requirements for doctors. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0024] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0025] Figure 2 This is a bottom view of Embodiment 1 of the present invention;

[0026] Figure 3 This is a left view of Embodiment 1 of the present invention;

[0027] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. First anterior tooth band group; 2. Second anterior tooth band group; 21. Inner connecting bar; 22. Outer connecting bar; 3. Palatal bar; 4. Arch expander; 5. Fixing bar; 6. Connecting bar; 7. Empty chamber; 8. Mounting ring. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 To be continued Figure 3 The principles and features of the present invention are described, and the examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0031] Example 1

[0032] Please see Figures 1-3 This invention provides an orthodontic appliance for depressing posterior tooth elongation. This appliance includes a first anterior band assembly 1 and a second anterior band assembly 2, with a palatal bar 3 connecting the second anterior band assembly 2 and the first anterior band assembly 1. Holes 7 are formed on the inner walls of the first and second anterior band assemblies 1 and 2. Fixing rods 5 are provided on both sides of the other end of the palatal bar 3 of the second anterior band assembly 2, and an inner connecting rod 21 is provided between the fixing rods 5 and the inner side of the second anterior band assembly 2. The first and second anterior band assemblies 1 and 2 are used to fit onto the anterior teeth on the sides in front of the molars to be depressed. The first and second anterior band assemblies 1 and 2 are respectively connected to the two ends of the palatal bar 3. When the first and second anterior band assemblies 1 and 2 are fitted onto the teeth through the hollows 7, the appliance reduces material consumption while ensuring the strength of the first and second anterior band assemblies 1 and 2, thereby reducing production costs.

[0033] Please see Figures 1-3 The transpalatal bar 3 is fixed to one end of the first anterior tooth band group 1 and the second anterior tooth band group 2 on both sides, and the inner connecting rod 21 is fixed to the end of the inner surface of the second anterior tooth band group 2. The second anterior tooth band group 2 is fixed to the fixing rod 5 through the inner connecting rod 21 and is placed on both sides of the alveolar bone with the arch expander 4.

[0034] Please see Figures 1-3 One end of the fixing rod 5 is equipped with an expander 4, which is located on the outside of the second anterior tooth band group 2. The other end of the expander 4 is also equipped with a mounting ring 8. The other end of the fixing rod 5 is equipped with a connecting rod 6, and the other end of the connecting rod 6 is equipped with a mounting ring 8. The positions of the two mounting rings 8 correspond to each other. The expander 4 is fixed on the outside of the tooth base. The mounting ring 8 cooperates with the anchorage screw implanted in the alveolar bone to install and fix the first anterior tooth band group 1 and the second anterior tooth band group 2. The mounting ring 8 on the connecting rod 6 also cooperates with the anchorage screw at the other end of the alveolar bone for fixation.

[0035] Please see Figures 1-3 An outer connecting rod 22 is provided between the other side of the second anterior tooth band group 2 and the expander 4. The number of outer connecting rods 22 corresponds to the number of slots on the second anterior tooth band group 2. The other end of the outer connecting rod 22 is fixed to one end of the expander 4. The other side of the second anterior tooth band group 2 is fixed to the second anterior tooth band group 2 through the outer connecting rod 22.

[0036] Example 2

[0037] Please see Figure 4The transpalatal bar 3 is fixed to the middle of the inner surface of the first anterior tooth band group 1. The other end of the transpalatal bar 3 is provided with an inner connecting rod 21, which is fixed to the end of the inner surface of the second anterior tooth band group 2. One end of the second anterior tooth band group 2 is fitted onto the anterior tooth on the side in front of the molar to be pushed, and is fixed to the transpalatal bar 3 by the inner connecting rod 21.

[0038] Please see Figure 4 The other end of the fixing rods 5 on both sides of the second anterior tooth band group 2 is also provided with a connecting rod 6, and the other end of the connecting rod 6 is provided with a mounting ring 8. The positions of the two mounting rings 8 correspond to each other. The second anterior tooth band group 2 is fixed to the transpalatal bar 3 by the inner connecting rod 21, and the fixing is achieved by the mounting rings 8 on the fixing rod 5 and the mounting rings 8 on the transpalatal bar 3 cooperating with the anchorage screw.

[0039] Please see Figures 1-4 Method of using an orthodontic appliance to depress elongated posterior teeth:

[0040] S1, take lateral cephalometric radiographs and CBCT scans, and save the model;

[0041] S2, intraoral scan data acquisition;

[0042] S3, 3D printing of orthodontic appliances: Based on intraoral scan data, the implantation location of the anchorage screw is determined and the appliance is fabricated;

[0043] S4, the orthodontic appliance is bonded intraorally and the anchorage screw is implanted in parallel;

[0044] S5, a lingual buckle is bonded to the buccal and lingual sides of the elongated tooth, and a chain-like leather band connects the lingual buckle and the appliance.

[0045] Please see Figures 1-4 S1 involves developing an orthodontic treatment plan based on a model; S2 involves intraoral scanning to acquire a full-mouth digital model; S3 involves processing the digital model using software, importing the intraoral scan data into 3D design software, and fabricating the orthodontic appliance at the designed anchorage screw placement locations. Specifically, S1 determines the placement of the micro-implants, and S2 involves comprehensive three-dimensional data acquisition of the oral cavity. Itero or 3shape TRIOS scanning devices are used to scan the patient's maxillofacial region, acquiring three-dimensional tomographic images of hard tissue structures including the roots of the maxillary teeth, alveolar bone, and palatal bone tissue. An intraoral scanner is used to optically scan the patient's maxillary dentition, acquiring high-precision digital impression data that accurately reflects the crown morphology, gingival and palatal mucosa, and other soft tissue surfaces, ensuring that each installation component fits perfectly within the oral cavity.

[0046] During use, the micro-implant anchorage and group tooth anchorage reduce the number of implants to minimize patient risk while distributing reaction forces to each tooth through the orthodontic appliance. The 3D-printed metal appliances in the adjacent anchorage tooth area are high-strength and bonded to multiple abutment teeth, limiting anchorage tooth movement. With the synergy of the micro-implants, the orthodontic force is well-expressed, resulting in high treatment efficiency. Sufficient anchorage utilization allows for the intrusion of multiple molars with a single implant; the bending position of the extended traction hooks in the fixed-pad appliance is easily adjustable, and force can be applied by bonding lingual clips to elongated teeth, allowing flexible control of the intrusion direction and location; it can achieve overall molar intrusion without generating forces in other directions, and is also applicable to cases where some elongated molars are tilted and require adjustment; for cases with only individual cusps elongated, different application points and force values ​​can be used to complete the treatment; the appliance is fixedly bonded to the patient's dentition without patient cooperation, providing continuous and stable orthodontic force and high treatment efficiency; micro-implants... Implant placement sites are easy to select. The purpose of implantation is to stabilize the anchorage dentition. It only needs to be close to adjacent anchorage teeth to create indirect anchorage. It can be used on the buccal and lingual sides and between multiple tooth positions. It reduces the problem of not having suitable placement sites for micro-implants. It can be placed in sites with high bone density, sufficient bone volume, and large interdental distance. It is also suitable for intrusion of maxillary second molars and mandibular molars, where it is difficult to place micro-implants on the lingual and palatal sides. It is also easier to find suitable placement sites for older patients with insufficient bone volume. There is no need to worry about unfavorable movement of elongated molars due to poor placement angle, which reduces the skill requirements of doctors.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An orthodontic appliance for indenting posterior teeth, characterized in that: It includes a first anterior tooth band group (1) and a second anterior tooth band group (2), and a transpalatal bar (3) is connected between the second anterior tooth band group (2) and the first anterior tooth band group (1); a cavity (7) is opened on the inner side wall of the first anterior tooth band group (1) and the second anterior tooth band group (2); a fixing bar (5) is provided on both sides of the other end of the transpalatal bar (3), and an inner connecting bar (21) is provided between the fixing bar (5) and the inner side of the second anterior tooth band group (2).

2. The orthodontic appliance for depressing posterior tooth elongation according to claim 1, characterized in that: The transpalatal bar (3) is fixed to one end of the first anterior tooth band group (1) and the second anterior tooth band group (2) on both sides, and the inner connecting rod (21) is fixed to the end of the inner side of the second anterior tooth band group (2).

3. The orthodontic appliance for depressing posterior tooth elongation according to claim 2, characterized in that: One end of the fixed rod (5) is provided with an arch expander (4), which is located outside the second anterior tooth band group (2). The other end of the arch expander (4) is also provided with an mounting ring (8). The other end of the fixed rod (5) is provided with a connecting rod (6), and the other end of the connecting rod (6) is provided with an mounting ring (8). The positions of the two mounting rings (8) correspond to each other.

4. The orthodontic appliance for depressing posterior tooth elongation according to claim 3, characterized in that: An outer connecting rod (22) is provided between the other side of the second anterior tooth band group (2) and the expander (4). The number of outer connecting rods (22) corresponds to the number of slots on the second anterior tooth band group (2). The other end of the outer connecting rod (22) is fixed to one end of the expander (4).

5. The orthodontic appliance for depressing posterior tooth elongation according to claim 1, characterized in that: The transpalatal bar (3) is fixed to the middle of the inner side of the first anterior tooth band group (1), and an inner connecting rod (21) is provided at the other end of the transpalatal bar (3). The inner connecting rod (21) is fixed to the end of the inner side of the second anterior tooth band group (2).

6. The orthodontic appliance for depressing posterior tooth elongation according to claim 5, characterized in that: The other end of the fixing rod (5) on both sides of the second anterior tooth band group (2) is also provided with a connecting rod (6), and the other end of the connecting rod (6) is provided with a mounting ring (8), and the positions of the two mounting rings (8) correspond to each other.

7. A method of using the orthodontic appliance for depressing posterior tooth elongation as described in any one of claims 1-6, characterized in that: S1, take lateral cephalometric radiographs and CBCT scans, and save the model; S2, intraoral scan data acquisition; S3, 3D printing of orthodontic appliances: Based on intraoral scan data, the implantation location of the anchorage screw is determined and the appliance is fabricated; S4, the orthodontic appliance is bonded intraorally and the anchorage screw is implanted in parallel; S5, a lingual buckle is bonded to the buccal and lingual sides of the elongated tooth, and a chain-like leather band connects the lingual buckle and the appliance.

8. The method of using an orthodontic appliance for depressing posterior tooth elongation according to claim 7, characterized in that: S1 involves developing an orthodontic treatment plan based on the model; S2 involves obtaining a full-mouth digital model through intraoral scanning; S3 involves processing the digital model using software, importing the intraoral scan data into 3D design software, and fabricating the orthodontic appliance at the designed anchorage screw implantation location.

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