A guided orthodontic appliance for mandibular impacted teeth treatment

Abstract

This invention provides a guided orthodontic device for mandibular impacted teeth treatment, belonging to the field of oral medical device technology. It includes a lingual bar, multiple retention rings, at least one abutment, and at least one guide rod. The lingual bar is a continuous arc-shaped metal wire extending along the lingual side of the mandibular dental arch. The lingual side of each retention ring is fixedly connected to the lingual bar. The lower end of the abutment is fixed to the lingual bar, and its upper end extends upward and has an abutment portion for contacting the abutment tooth surface. The proximal end of the guide rod is fixed to the lingual bar, and its distal end extends towards the oral vestibule, with a connecting portion at its end for attaching a traction component. This invention provides stable, distributed surface anchorage through multiple retention rings, effectively transmits the gingival force experienced by the device to the abutment tooth through the abutment, further enhancing anchorage stability. The flexible, cantilevered guide rod with a connecting portion at its end enables control of the traction direction of the impacted tooth.

Description

Technical Field

[0001] This utility model relates to the field of oral medical device technology, and in particular to a guided orthodontic device for the treatment of mandibular impacted teeth. Background Technology

[0002] Impacted teeth are teeth that remain embedded in the jawbone beyond their normal eruption time. The treatment of mandibular impacted teeth is a challenging area in orthodontics. Currently, a combined approach of surgical fenestration and orthodontic traction is commonly used clinically. This involves surgically exposing the crown and then applying traction using orthodontic appliances to guide the tooth's eruption. The key to this process is providing stable anchorage and achieving precise control over the direction of traction.

[0003] Existing technologies for devices used to traction impacted teeth often have significant drawbacks. For example, while micro-implants provide absolute anchorage, they are invasive and risky, and the force direction is singular and difficult to adjust. Welding traction hooks to a single tooth or a few adjacent teeth poses a risk of insufficient anchorage and displacement of the anchoring tooth. Using an elastic chain connecting the impacted tooth to the archwire results in significant anchorage loss and makes it difficult to effectively control the traction direction. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a guided orthodontic device for the treatment of mandibular impacted teeth.

[0005] The technical solution adopted by this utility model is as follows: This application provides a guided orthodontic device for mandibular impacted teeth treatment, including a tongue bar, multiple retention rings, at least one abutment, and at least one guide rod. The tongue bar is a continuous arc-shaped metal wire for extending along the lingual side of the mandibular dental arch. The lingual side of the retention rings is fixedly connected to the tongue bar. The lower end of the abutment is fixed to the tongue bar, and its upper end extends upward and is provided with an abutment portion for abutting the abutment tooth surface. The proximal end of the guide rod is fixed to the tongue bar, and its distal end extends towards the oral vestibule. Its end is provided with a connecting portion for hooking a traction component.

[0006] In some embodiments, the support is Z-shaped, with its lower arm fixed to the tongue bar and its upper arm extending to the abutment tooth surface region.

[0007] In some embodiments, the abutment portion is a support block disposed at the end of the upper arm.

[0008] In some embodiments, the support block is a triangular block used to abut against the central fossa or marginal ridge of the abutment tooth.

[0009] In some embodiments, the contact surface of the support block is configured as an arc-shaped surface.

[0010] In some embodiments, the retention ring is a vertically continuous annular structure, and the width of its distal gingival margin is smaller than the width of its mesial gingival margin.

[0011] In some embodiments, the guide rod is a cantilever structure with an arc-shaped portion extending outward and downward and then forward and inward at its distal end, and the connecting portion is a hanging ring formed by bending the end.

[0012] In some embodiments, the number of retaining rings is four, and they are divided into two groups and fixed to both sides of the tongue rod respectively. Each group includes a front retaining ring and a rear retaining ring, and the two ends of the tongue rod are respectively fixed to the rear retaining rings on both sides.

[0013] In some embodiments, the number of supports is two, and they are respectively fixed on both sides of the tongue rod, with the lower end of each support fixed to the tongue rod between the front retention ring and the rear retention ring on the same side.

[0014] In some embodiments, the number of guide rods is one, which is fixed to the tongue rod in front of the anterior retention ring on the side corresponding to the impacted tooth.

[0015] In some embodiments, the number of guide rods is two, and the two guide rods are fixed symmetrically to the front of both sides of the tongue rod.

[0016] The beneficial effects of this invention are as follows: This invention provides stable, distributed surface anchorage through multiple retention rings; its unique support structure effectively transmits the gingival force on the device to the abutment teeth, preventing device subsidence and further enhancing anchorage stability; and its flexible, cantilevered guide rod with a connecting end enables effective control of the traction direction of impacted teeth in three-dimensional space. The entire device has an ingenious structural design and clear function, effectively improving the efficiency and success rate of mandibular impacted tooth orthodontic treatment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0018] Figure 1 This is a schematic diagram of a guided orthodontic device for treating impacted mandibular teeth according to this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of a guided orthodontic device for treating impacted mandibular teeth according to this utility model. Figure 2 ;

[0020] Figure 3 This is a schematic diagram illustrating the use of a guided orthodontic device for mandibular impacted tooth treatment according to this utility model.

[0021] In the diagram: 1-tongue rod; 2-retention ring; 21-front retention ring; 22-rear retention ring; 3-support; 31-abutment part; 4-guide rod; 41-connecting part. Detailed Implementation

[0022] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0024] It should be noted that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0025] It should be noted that the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0026] It should be noted that the terms "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "in some embodiments," "exemplarily," and "for example" is intended to present the relevant concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of this application.

[0027] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0029] To address the problems of unstable anchorage and inaccurate traction direction control in existing mandibular impacted tooth orthodontic appliances, such as... Figures 1 to 3 As shown, this utility model proposes a guided orthodontic device for mandibular impacted teeth, including a lingual bar 1 as the main skeleton. The lingual bar 1 is a continuous arc-shaped metal wire, usually made of biocompatible stainless steel wire with a diameter of 0.8-1.0 mm. Its curvature is adapted to the lingual shape of the patient's mandibular dental arch. After installation, it is located on the lingual side of the dental arch and maintains an appropriate distance from the gingival margin to avoid compressing soft tissue.

[0030] To securely attach the tongue bar 1 to the oral cavity, multiple retention rings 2 are provided. The lingual surfaces of the multiple retention rings 2 are fixedly connected to the tongue bar 1 by welding or other means. These retention rings 2 are used to bond and fix to the crowns of selected mandibular posterior teeth (such as the first premolar and the first molar), thereby firmly anchoring the entire device to the dental arch and forming a distributed and powerful anchorage system.

[0031] In some specific embodiments, the retention ring 2 is a continuous annular structure, which facilitates the filling of dental adhesive, and its distal gingival margin width is designed to be smaller than that of the mesial gingival margin. This design fully considers the anatomical characteristics of abutment teeth (such as the mandibular first molar) which often have a large amount of gingival coverage in the distal neck, thus avoiding compression or damage to the gingiva during device insertion and improving patient comfort.

[0032] In a preferred embodiment, there are four retaining rings 2, which are divided into two groups, left and right, and fixed to both sides of the tongue rod 1. Each group includes a front retaining ring 21 located at the front and a rear retaining ring 22 located at the rear. The two ends of the tongue rod 1 extend and are fixed to the rear retaining rings 22 on both sides, thus forming a four-point layout, which greatly enhances the retaining force and stability of the device.

[0033] To counteract the torque that may cause the device to sink downwards towards the gum line during traction, the device is further provided with at least one abutment 3. The lower end of the abutment 3 is fixed to the lingual bar 1, and its upper end extends upwards and is provided with an abutment portion 31 specifically for abutting against the occlusal surface of the abutment tooth (such as the mandibular premolar). When traction force is applied to the front end of the device, the resulting sinking force is transmitted to the solid tooth structure of the abutment tooth through the abutment portion 31 of the abutment 3, thereby effectively preventing the entire device from shifting or tilting towards the gum line and ensuring absolute stability of the anchorage.

[0034] For example, the support 3 can be designed in a Z-shape, with its lower horizontal arm welded and fixed to the tongue bar 1, and its upper horizontal arm extending to the abutment tooth surface area. The abutment portion 31 is a support block disposed at the end of the upper horizontal arm.

[0035] In a preferred embodiment, the support block is preferably a triangular block. Its shape design allows it to stably abut against physiological depressions or protrusions such as the central fossa or marginal ridge on the abutment tooth surface, forming point-like or small-area surface contact, which provides effective vertical support while avoiding interference with occlusion.

[0036] In a preferred embodiment, the contact surface of the support block is set as an arc-shaped surface to avoid damage to the abutment tooth surface.

[0037] In a preferred embodiment, there are two supports 3, which are fixed to the left and right sides of the tongue bar 1 respectively. The lower end of each support 3 is specifically fixed to the tongue bar 1 between the front retention ring 21 and the rear retention ring 22 on the same side, and its position corresponds to the abutment tooth that serves as anchorage.

[0038] At least one of the guide rods 4 has its proximal end fixed to the lingual rod 1, while its distal end extends as a free cantilever towards the vestibule (labial / buccal side) of the oral cavity. At this distal end, a connecting portion 41 is provided for attaching an elastic traction element (such as an elastic cord or elastic chain). The dentist can apply orthodontic force to the impacted tooth by attaching the traction element to it.

[0039] The guide rod 4 is designed as a cantilever structure, with its proximal end fixed and its distal end free, allowing for flexible adjustment. Its distal portion has a specific arc-shaped section that extends first outward and downward, then forward and inward. This double-curved design allows the connecting part 41 to cleverly avoid the sensitive buccal mucosa (bypassing the vestibule sulcus) and ultimately position the force application point in the ideal location of the oral vestibule, facilitating clinical operation.

[0040] The connecting part 41 can be a small hanging ring bent at the end, used to stably hang the elastic cord and prevent it from slipping off.

[0041] The number and position of the guide rods 4 can be flexibly set according to clinical needs.

[0042] In some embodiments, the number of guide rods 4 is one. When the patient has a unilateral impacted tooth, the single guide rod 4 is fixed to the tongue bar 1 in front of the anterior retention ring 21 on the side where the impacted tooth is located (e.g., the right side).

[0043] In other embodiments, such as when the patient has bilateral impacted teeth, the number of guide rods 4 is two. The two guide rods 4 are symmetrically fixed to the front of both sides of the tongue bar 1 to simultaneously pull on the impacted teeth on both sides. The guide rods 4 are typically made of bent metal wire with a diameter slightly smaller than that of the tongue bar 1, such as stainless steel wire with a diameter of 0.7-0.9 mm. This ensures sufficient strength while also providing good flexibility, allowing the dentist to adjust the curvature manually with instruments as the teeth move during treatment, thereby precisely changing the direction of the traction force.

[0044] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0045] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0046] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A guiding orthodontic device for the treatment of a mandibular impacted tooth, characterized in that, The device includes a tongue bar, multiple retention rings, at least one support, and at least one guide rod. The tongue bar is a continuous arc-shaped metal wire that extends along the lingual side of the mandibular dental arch. The lingual side of the retention rings is fixedly connected to the tongue bar. The lower end of the support is fixed to the tongue bar, and its upper end extends upward and has an abutment portion for abutting the abutment tooth surface. The proximal end of the guide rod is fixed to the tongue bar, and its distal end extends toward the oral vestibule. Its end has a connecting portion for attaching a traction assembly.

2. The guiding orthodontic device for the treatment of a mandibular impacted tooth according to claim 1, characterized in that, The support is Z-shaped, with its lower arm fixed to the tongue bar and its upper arm extending to the abutment tooth surface area.

3. The guiding orthodontic device for the treatment of a mandibular impacted tooth according to claim 2, characterized in that, The abutting part is a support block located at the end of the upper arm.

4. The guided orthodontic appliance for mandibular impacted tooth correction according to claim 3, characterized in that, The support block is a triangular block used to abut against the central fossa or marginal ridge of the abutment tooth.

5. The guiding orthodontic device for the treatment of a mandibular impacted tooth according to claim 4, characterized in that, The contact surface of the support block is set as an arc-shaped surface.

6. The guiding orthodontic device for the treatment of a mandibular impacted tooth according to claim 1, characterized in that, The retention ring is a continuous ring structure, with the width of its distal gingival margin being smaller than that of its mesial gingival margin.

7. The guiding orthodontic device for the treatment of a mandibular impacted tooth according to claim 1, characterized in that, The guide rod is a cantilever structure with an arc-shaped part at its distal end that extends outward and downward first, and then forward and inward. The connecting part is a hanging ring formed by bending the end.

8. The guiding orthodontic device for the treatment of a mandibular impacted tooth according to claim 1, characterized in that, The number of retaining rings is four, and they are divided into two groups and fixed to both sides of the tongue rod. Each group includes a front retaining ring and a rear retaining ring, and the two ends of the tongue rod are fixed to the rear retaining rings on both sides.

9. The guiding orthodontic device for the treatment of a mandibular impacted tooth according to claim 7, characterized in that, The number of supports is two, and they are fixed on both sides of the tongue rod respectively. The lower end of each support is fixed on the tongue rod between the front retention ring and the rear retention ring on the same side.

10. The guiding orthodontic device for the treatment of a mandibular impacted tooth according to claim 1, characterized in that, The number of guide rods is one, which is fixed on the tongue bar in front of the anterior retention ring on the side corresponding to the impacted tooth; or, the number of guide rods is two, with the two guide rods fixed symmetrically on the front of both sides of the tongue bar.

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