Bone expansion device

Abstract

The utility model belongs to the technical field of arch expanders, and discloses a bony arch expander. The bony expansion device comprises two support bodies which are arranged in parallel; the fixing holes are formed in the two ends of the bracket body and are used for fixing the bracket body and the upper jawbone; the two bracket rods are fixedly connected to the opposite side walls of the two bracket bodies; the screw holes are formed in the two support bodies, and the axes of the fixing holes are perpendicular to the axes of the screw holes; the two ends of the positive and negative screw rod are in threaded connection with the interiors of the two screw holes respectively; the rotating column is arranged in the middle of the positive and negative screw rod, and the positive and negative screw rod can be rotated by screwing the rotating column; and the guide structure is arranged between the two bracket bodies. According to the bony expansion device, the support body is additionally provided with the fixing holes on the basis of the prior art, the expansion device can be fixed to the upper jawbone through the fixing holes by screws, in this way, mechanical force directly acts on the upper jawbone, and effective expansion can still be conducted after the palate center joint is closed.

Description

Technical Field

[0001] This utility model relates to the technical field of bow expanders, specifically a bony bow expander. Background Technology

[0002] In the field of oral medicine, the health and aesthetics of teeth and jawbones have always been a major focus of attention. With the improvement of people's quality of life, the importance people place on oral health is increasing daily. People not only expect good chewing function but also pursue a beautiful appearance with straight teeth and facial harmony. Among the many factors affecting oral aesthetics and function, abnormalities in the development of the dental arch and jawbone are relatively common.

[0003] To address this issue, the traditional approach is to use an arch expander. While traditional expanders are effective for dental problems, they fall short when dealing with skeletal issues. Once the palatal suture closes, conventional orthodontic methods struggle to effectively expand the jawbone, failing to fundamentally resolve skeletal arch narrowing. For instance, in some adolescents in the later stages of growth and development or in adult patients, even prolonged use of a regular arch expander yields minimal improvement in arch width and jawbone morphology, making it difficult to achieve the desired treatment goals.

[0004] Early attempts at bony arch expansion primarily employed surgical-assisted methods, such as incising the mid-palatal suture to achieve expansion. However, this approach is highly invasive, causing significant postoperative pain for patients and posing risks of infection and bleeding, thus limiting its clinical application. Against this backdrop, a non-surgical, relatively minimally invasive treatment device is needed.

[0005] The limitations of existing technologies: They are effective for dental problems, but they are inadequate for skeletal problems. Once the palatal suture closes, conventional orthodontic methods cannot effectively expand the jawbone and cannot fundamentally solve problems such as skeletal arch stenosis. Utility Model Content

[0006] The purpose of this utility model is to provide a bony expander that solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a bony expander, comprising:

[0008] The support structure consists of two parallel supports.

[0009] Fixing holes are provided at both ends of the support body for fixing the support body to the maxilla;

[0010] The two support rods are fixedly connected to the opposite side walls of the two support bodies;

[0011] Screw holes are provided on both of the bracket bodies, and the two screw holes are coaxial but have opposite threads. The axis of the fixing hole is perpendicular to the axis of the screw hole.

[0012] A positive and negative screw, wherein the two ends of the positive and negative screw are respectively threaded into two screw holes;

[0013] A rotating column is located in the middle of the positive and negative screws; turning the rotating column can rotate the positive and negative screws.

[0014] A guide structure is provided between two support bodies to guide their movement. When the forward and reverse screws are rotated, the support bodies can translate along the axial direction of the forward and reverse screws.

[0015] Preferably, the guiding structure includes cards, guide rods, positioning grooves, slots, and guide holes. Both cards are sleeved on the positive and negative screws through their central holes, and the two cards are respectively located on both sides of the rotating column. Guide holes are provided on both sides of the screw holes on the two support bodies. Positioning grooves are provided at both ends of the cards corresponding to the positions of the guide holes. The two guide rods are located in the positioning grooves, and slots are provided on the guide rods corresponding to the positions of the positioning grooves. The slots engage with the positioning grooves. The two ends of the guide rods are respectively inserted into the corresponding guide holes on the two support bodies, so that the movement of the support bodies is guided by the guide rods.

[0016] Preferably, the two support rods are symmetrically arranged with reference to the screw hole axis, and the axis of the support rod is parallel to the screw hole axis.

[0017] Preferably, both cards are in contact with the rotating column.

[0018] Preferably, the two guide holes are arranged symmetrically with reference to the axis of the screw hole.

[0019] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0020] This bony expander, based on existing technology, adds fixing holes to the support body, allowing screws to be used to fix the expander to the maxilla. This ensures that mechanical force is applied directly to the maxilla, and effective expansion can still be performed even after the mid-palatal suture has closed. At the same time, the design of the guide structure provides guidance for the movement of the support body, maintaining the stability of the expander during adjustment. The engagement between the clip and the guide rod further enhances the structural stability. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present utility model;

[0022] Figure 2 This is a plan view of the present invention;

[0023] Figure 3 This is an exploded view of the present invention.

[0024] In the diagram: 1. Support body; 2. Fixing hole; 3. Support rod; 4. Screw hole; 5. Positive and negative screws; 6. Rotating column; 7. Guide structure; 71. Card; 72. Guide rod; 73. Positioning groove; 74. Card slot; 75. Guide hole. Detailed Implementation

[0025] Please see Figure 1-3 This utility model provides a technical solution: a bony expander, comprising:

[0026] Support body 1, two support bodies 1 are set in parallel;

[0027] Fixing holes 2 are provided at both ends of the support body 1 for fixing the support body 1 to the maxilla. The expander can be fixed to the maxilla with screws through the fixing holes 2.

[0028] Support rod 3, two support rods 3 are fixedly connected to the opposite side walls of the two support bodies 1;

[0029] The support rod 3 is welded to the support body 1. The support rod 3 can be bent into a shape suitable for the dental arch and welded to the band. It is mainly used for positioning and assisting in arch expansion.

[0030] Screw holes 4 are provided on both bracket bodies 1. The two screw holes 4 are coaxial but have opposite threads. The axis of the fixing hole 2 is perpendicular to the axis of the screw hole 4.

[0031] The positive and negative screws 5 are threaded into two screw holes 4 at their two ends respectively;

[0032] Rotating column 6 is located in the middle of the positive and negative screws 5. The rotating column 6 and the positive and negative screws are actually an integral structure. For ease of understanding, it is described as two separate structures. Twisting the rotating column 6 can rotate the positive and negative screws 5.

[0033] The rotating column 6 adopts a prism structure, which is shown as a hexagonal prism in the attached drawings of this application. This makes it easy to turn the screws 5 with a wrench. When the screws 5 are turned during treatment, the support body 1 will move closer to or further away from the rotating column 6.

[0034] The guide structure 7 is set between the two support bodies 1 to guide the movement of the two support bodies 1. When the positive and negative screws 5 are rotated, the support body 1 can translate along the axial direction of the positive and negative screws 5.

[0035] The guide structure 7 includes a card 71, a guide rod 72, a positioning groove 73, a slot 74, and a guide hole 75. Two cards 71 ​​are sleeved on the positive and negative screws 5 through their central holes, and the two cards 71 ​​are located on opposite sides of the rotating column 6, both contacting the rotating column 6. Guide holes 75 are provided on both sides of the screw hole 4 on the two support bodies 1. Positioning grooves 73 are provided at both ends of the card 71 corresponding to the positions of the guide holes 75. The two guide holes 75 are symmetrically arranged with reference to the axis of the screw hole 4. Two guide rods 72 are located within the positioning grooves 73, and slots 74 are provided on the guide rods 72 corresponding to the positions of the positioning grooves 73. The slots 74 engage with the positioning grooves 73, preventing the guide rods 72 from dislodging from the positioning grooves 73 and using their structural limitation to prevent the guide rods 72 from dislodging from the guide holes 75. The two ends of the guide rods 72 are respectively inserted into the corresponding guide holes 75 on the two support bodies 1, so that the movement of the support body 1 is guided by the guide rods 72.

[0036] The two support rods 3 are symmetrically arranged with reference to the axis of the screw hole 4, and the axis of the support rod 3 is parallel to the axis of the screw hole 4.

[0037] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A skeletal expander, characterized in that, include: The support structure consists of two parallel supports. Fixing holes are provided at both ends of the support body for fixing the support body to the maxilla; The two support rods are fixedly connected to the opposite side walls of the two support bodies; Screw holes are provided on both of the bracket bodies, and the two screw holes are coaxial but have opposite threads. The axis of the fixing hole is perpendicular to the axis of the screw hole. A positive and negative screw, wherein the two ends of the positive and negative screw are respectively threaded into two screw holes; A rotating column is located in the middle of the positive and negative screws; turning the rotating column can rotate the positive and negative screws. A guide structure is provided between two support bodies to guide their movement. When the forward and reverse screws are rotated, the support bodies can translate along the axial direction of the forward and reverse screws.

2. The skeletal expander according to claim 1, wherein: The guiding structure includes cards, guide rods, positioning grooves, slots, and guide holes. Both cards are sleeved onto the positive and negative screws through their central holes, and the two cards are positioned on opposite sides of the rotating column. Guide holes are provided on both sides of the screw holes on the two support bodies. Positioning grooves are provided at both ends of the cards corresponding to the guide holes. The two guide rods are located within the positioning grooves, and slots are provided on the guide rods corresponding to the positioning grooves. The slots engage with the positioning grooves. Both ends of the guide rods are inserted into the corresponding guide holes on the two support bodies, allowing the movement of the support bodies to be guided by the guide rods.

3. A skeletal expander according to claim 2, wherein: The two support rods are symmetrically arranged with reference to the axis of the screw hole, and the axis of the support rod is parallel to the axis of the screw hole.

4. The skeletal expander according to claim 3, wherein: Both cards are in contact with the rotating column.

5. A skeletal expander according to claim 4, wherein: The two guide holes are symmetrically arranged with reference to the axis of the screw hole.

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