A novel device for releasing posterior tooth occlusion by simultaneously expanding the arch and depressing the lower anterior teeth.

Abstract

This application discloses a novel device for simultaneously expanding and depressing the mandibular anterior teeth to relieve posterior tooth occlusion, relating to the field of orthodontic technology. It includes a maxillary cast-crown spiral expander, a metal mesh split-plane guide, and traction clips. The maxillary cast-crown spiral expander comprises a cast crown and a spiral expander. The cast crown is used to secure the first premolar, second premolar, and first molar, and the spiral expander is fixedly connected to the cast crown. The metal mesh split-plane guide conforms to the anterior part of the maxillary palate and is fixedly connected to the cast crown. The traction clips are located on the buccal side of the cast crown and are cross-pulled by elastic bands with traction clips located on the lingual side of the mandibular posterior teeth. This application simultaneously expands the arch to solve the problems of maxillary width and vertical misalignment, and utilizes the maxillary cast-crown spiral expander as a reinforcing anchorage to prevent elongation and rotation of the maxillary anchorage teeth. It matches the width of the maxilla and mandible while minimizing anchorage loss, thus relieving posterior tooth occlusion.

Description

Technical Field

[0001] This application relates to the field of orthodontic technology, specifically to a novel device for releasing posterior tooth occlusion by simultaneously expanding the arch and depressing the lower anterior teeth. Background Technology

[0002] Angle Class II malocclusion is a common clinical condition. Patients with this condition typically exhibit abnormalities in the craniofacial development across three dimensions: transverse, sagittal, and vertical. Clinical manifestations primarily include narrow upper dental arch, deep overbite, and crowding of the teeth. Because the narrow upper dental arch restricts the development of the lower dental arch, posterior crossbite may occur.

[0003] For such cases, the clinical approach is usually to first expand the maxillary arch to address insufficient transverse development. After 3-6 months, once the expansion effect has stabilized, the bite is opened and posterior tooth locking is relieved using reciprocal traction. This treatment method not only prolongs the orthodontic treatment time, but also leads to adverse consequences such as elongation of the upper and lower posterior teeth, increased posterior occlusion, premature contact causing occlusal trauma, and masticatory system dysfunction due to reciprocal traction using the maxillary posterior teeth as anchorage. Furthermore, reciprocal traction relies on the maxillary posterior teeth, which easily causes relapse of the maxillary expansion effect, making it difficult to coordinate the width of the upper and lower jaws. Utility Model Content

[0004] The main objective of this application is to provide a novel device for releasing posterior tooth occlusion by simultaneously depressing the lower anterior teeth during arch expansion, thereby solving the aforementioned technical problems.

[0005] The technical solution adopted in this application is as follows:

[0006] A novel device for releasing posterior tooth occlusion by simultaneously expanding the arch and depressing the lower anterior teeth includes:

[0007] A cast-coated spiral expander for the maxilla, comprising a cast crown and a spiral expander, wherein the cast crown is used to secure the first premolar, the second premolar and the first molar, and the spiral expander is fitted to the maxillary palate and fixedly connected to the cast crown.

[0008] A metal mesh split planar guide plate is fitted to the anterior part of the maxilla and is fixedly connected to the cast crown.

[0009] The traction buckle is located on the buccal side of the cast crown and is cross-pulled with a traction buckle located on the lingual side of the mandibular posterior teeth via an elastic band.

[0010] Optionally, the metal mesh split planar guide plate includes:

[0011] A split metal support mesh, wherein the split metal support mesh is fixedly connected to a cast crown located at both ends on the first premolars;

[0012] A base plate, which is fixed to the side of the split metal support mesh away from the anterior part of the maxilla.

[0013] Optionally, the metal mesh split planar guide plate splits from the mid-palatal suture position into a left premolar support panel and a right premolar support panel.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] This application presents a novel device for resolving posterior tooth locking by simultaneously expanding the arch and depressing the lower anterior teeth. Using a spiral expander in conjunction with cast crowns, it expands the maxilla while utilizing a metal mesh split-plane guide plate that fits between the upper anterior teeth and the anterior part of the maxillary palate. Each time the patient bites, the lower anterior teeth contact the guide plate. This continuous vertical pressure is applied to the lower anterior teeth through the guide plate, pressing along the long axis of the teeth into the alveolar socket, thereby depressing the lower anterior teeth. This simultaneously addresses maxillary width and vertical misalignment, thus shortening treatment time and providing orthodontists with a more efficient treatment method.

[0016] In addition, using a cast-on spiral expander in the maxilla as a reinforced anchorage device can, to some extent, prevent the elongation and rotation of the maxillary anchorage teeth. It can also match the width of the upper and lower jaws while minimizing anchorage loss, thus relieving posterior tooth locking. This device features a metal mesh split-plane guide plate for support, increasing strength, fracture resistance, and providing better mechanical properties. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the novel device for releasing posterior tooth occlusion by simultaneously depressing the lower anterior teeth during arch expansion, as provided in the embodiments of this application;

[0018] Figure 2 This is a schematic diagram showing the placement of the novel device for simultaneously depressing the lower anterior teeth during arch expansion, as provided in this application embodiment, in the oral cavity.

[0019] Explanation of the labels in the attached drawings:

[0020] 100-Maxillary cast conjoined spiral expander, 101-Cast conjoined crown, 102-Spiral expander, 200-Metal mesh split planar guide plate, 201-Split metal support mesh, 202-Base plate, 300-Traction buckle. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0025] See attached document Figure 1 This application provides a novel device for releasing posterior tooth locking by simultaneously expanding the arch and depressing the lower anterior teeth. It is especially suitable for patients with posterior tooth locking of equal or low angle who need to expand the maxilla and depress the lower anterior teeth during orthodontic treatment. Specifically, it includes three major components: a maxillary cast conjoined spiral expander 100, a metal mesh split planar guide plate 200, and a traction buckle 300. The three major components adopt an integrated structure.

[0026] Specifically:

[0027] like Figure 2 As shown, the maxillary cast crown spiral expander 100 includes a cast crown 101 and a spiral expander 102. There is one set of cast crowns 101 on each side. During orthodontic treatment, the cast crowns 101 are secured to the first premolar, second premolar, and first molar. The cast crowns 101 are designed as rings, each only partially covering the crown. On one hand, by fixing the cast crowns 101 to the upper molars, they act as a fixation device, improving patient comfort. On the other hand, fixing the cast crowns 101 to the upper molars allows for the transmission of forces required for orthodontic treatment, such as torsional and vertical forces. These forces help adjust the position, angle, and occlusion of the teeth, achieving the goal of orthodontic correction.

[0028] In the above description, the spiral expander 102 is a conventional structure. During orthodontic treatment, the spiral expander 102 fits against the maxillary palate. The spiral expander 102 is fixed to the lingual side of the cast crowns 101 on both sides by welding through the expander connecting rod. The spiral expander 102 can expand the width of the maxilla, thereby correcting abnormal tooth alignment and narrow jawbone problems. By applying appropriate force and pressure, the spiral expander 102 can gradually increase the width of the jawbone, thereby creating more space, which helps in the movement and adjustment of teeth, and can thus treat problems such as dentofacial deformities, narrow dental arches, and malocclusion.

[0029] In this embodiment, the metal mesh split planar guide 200 includes a split metal support mesh 201 and a base plate 202. The two ends of the split metal support mesh 201 are welded and fixed to the lingual side of the cast crown 101 where the first premolar is located. The split metal support mesh 201 is a single support mesh that is split into left and right halves at the mid-palatal suture. The base plate 202 is located on the side of the split metal support mesh 201 away from the front of the maxillary palate. The base plate 202 is formed by covering the surface of the split metal support mesh 201 with resin. The base plate 202 is also split into two halves at the break point of the split metal support mesh 201. Thus, the entire metal mesh split planar guide 200 is set to split into a left premolar support panel and a right premolar support surface at the mid-palatal suture.

[0030] Meanwhile, as mentioned above, the traction buckle 300 is welded to the buccal side of the cast crown 101, and cross-traction is achieved with the traction buckle located on the lingual side of the mandibular posterior teeth via a rubber band.

[0031] This application provides a novel device for releasing posterior tooth occlusion by simultaneously depressing the lower anterior teeth during arch expansion. By rotating the arch expansion screw 102 from front to back twice a day for about two weeks, the palatal midline is opened by mechanical force, stimulating the connective tissue in the palatal midline to differentiate into osteoblasts and deposit new bone, thereby increasing the width of the basal bone and achieving the purpose of arch expansion.

[0032] Of course, the process of fabricating the novel device for releasing posterior tooth occlusion that simultaneously expands the arch and depresses the lower anterior teeth as provided in this embodiment includes the following steps:

[0033] S1: Model preparation: Take impressions of the patient's upper and lower jaws to prepare a plaster model.

[0034] S2: Design and Marking: Determine the design scheme of the orthodontic appliance on the model, including the position of the cast crown, the type and position of the expander, the shape and position of the metal mesh split planar guide, etc., and mark them.

[0035] S3: Welding metal components: According to design requirements, weld the traction buckle onto the cast crown, and weld the spiral expander, traction buckle, cast crown and split metal support mesh together and fix them onto the model.

[0036] S4: Coating and fabrication of the planar guide plate: Apply resin base to the model, cover the base with a palatal split metal support mesh, and ensure that the posterior teeth do not contact the maxillary planar guide plate when the mandibular dentition bites into it.

[0037] S5: Base Splitting: At the split point of the metal mesh, use a thin sandpaper to cut the resin base into two parts.

[0038] S6: Grinding and polishing: Grinding and polishing the orthodontic appliance to ensure its surface is smooth and comfortable to wear.

[0039] In summary, the novel device for releasing posterior crossbite by simultaneously expanding the arch and intruding the lower anterior teeth, as provided in this application, can simultaneously expand the arch and intrude the lower anterior teeth. This addresses both the horizontal width imbalance of the maxilla and the vertical issues, opening the bite, improving deep overbite of the anterior teeth, providing vertical space for releasing posterior crossbite, shortening treatment time, and improving clinical treatment efficiency. Later, using the cast maxillary crown as anchorage for reciprocal traction reduces anchorage loss and, to some extent, prevents the elongation and rotation of the maxillary anchorage teeth that were previously used with reciprocal traction. This ensures the coordination of maxillary and mandibular width while minimizing anchorage loss, thereby releasing posterior crossbite. Furthermore, the device's planar guide plate has a split metal mesh support at the bottom, increasing strength and providing better mechanical performance compared to previous methods.

[0040] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A new device for releasing posterior crossbite, characterized in that, include: A cast-coated spiral expander for the maxilla, comprising a cast crown and a spiral expander, wherein the cast crown is used to secure the first premolar, the second premolar and the first molar, and the spiral expander is fitted to the maxillary palate and fixedly connected to the cast crown. A metal mesh split planar guide plate is fitted to the anterior part of the maxilla and is fixedly connected to the cast crown. The traction buckle is located on the buccal side of the cast crown and is cross-pulled with a traction buckle located on the lingual side of the mandibular posterior teeth via an elastic band.

2. The new device for releasing posterior crossbite according to claim 1, wherein, The metal mesh split planar guide plate includes: A split metal support mesh, wherein the split metal support mesh is fixedly connected to a cast crown located at both ends on the first premolars; A base plate, which is fixed to the side of the split metal support mesh away from the front of the maxilla.

3. The novel device for releasing posterior tooth occlusion by simultaneously depressing the lower anterior teeth during arch expansion according to claim 1 or 2, characterized in that, The metal mesh split planar guide plate splits into a left anterior molar support panel and a right anterior molar support panel at the mid-palatal suture.

Images