Fan-shaped arch expanding device

Abstract

The utility model relates to a fan-shaped arch expanding device which comprises two support bodies, the bottoms of the two support bodies are rotationally connected through a connecting piece, and the tops of the two support bodies are provided with connecting grooves; the number of the support rods is two, and the two support rods are fixedly connected with the two support bodies respectively and used for maxillary dental arch expansion. The utility model relates to the technical field of medical instruments. According to the fan-shaped arch expanding device, the two support bodies are arranged, the bottoms of the two support bodies are rotationally connected through the connecting piece, the support bodies of the arch expanding device can be gradually opened towards the two sides along the axis of the connecting piece, a fan-shaped opening track is formed, and arch expanding can be conducted on the anterior tooth area of a user; the fan-shaped expansion device is simple in structure and suitable for tooth problems such as stenosis of an anterior dental arch of an upper jaw, crowding of dentition and malocclusion of a specific type, the practicability of the fan-shaped expansion device can be effectively improved, the fan-shaped expansion device is more stable to use by connecting the adjusting assembly to the top ends of the two support bodies, and the practicability of the fan-shaped expansion device can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to a fan-shaped expander. Background Technology

[0002] With the improvement of socioeconomic level and the enhancement of health awareness, people's demand for oral aesthetics and health is increasing. A neat and harmonious dental arch shape is not only the foundation of occlusal function, but also an important component of facial aesthetics.

[0003] However, the prevalent problem of maxillary arch narrowing in clinical practice often leads to insufficient space for tooth alignment, causing malocclusions such as crowding, protrusion, or reverse overbite, which seriously affects patients' oral health and self-confidence. To address these issues, arch expansion techniques have become one of the core methods of orthodontic treatment, and spiral arch expanders, due to their efficient and controllable mechanical properties, have become key instruments for achieving arch expansion.

[0004] Traditional spiral expanders typically employ a design combining mechanical screws and metal supports. A typical structure includes four metal support rods, which are welded to a band, which is then fixed to the patient's molars or premolars. Rotating the screws drives the support rods to expand laterally, transmitting mechanical force to the alveolar bone or mid-palatal suture, thus promoting lateral expansion of the dental arch.

[0005] However, this type of design has certain limitations: it is suitable for situations where both anterior and posterior teeth need to be expanded simultaneously, but it is not suitable for dental problems such as narrow maxillary anterior arch, crowded teeth, and certain types of malocclusion. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fan-shaped bow expander in order to solve the technical problems mentioned in the background art.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0008] A fan-shaped bow expander, comprising:

[0009] The bracket body consists of two bracket bodies, which are rotatably connected at their bottoms via connectors, and have connection grooves at their tops.

[0010] There are two support rods, which are fixedly connected to two support bodies respectively, for the expansion of the maxillary dental arch;

[0011] The adjustment assembly is located between two support bodies. The adjustment assembly includes positive and negative screws and two rotating shafts. The two rotating shafts are respectively connected to two connecting grooves. Each rotating shaft has a threaded hole in the middle. The two ends of the positive and negative screws are threadedly connected to the two threaded holes.

[0012] Furthermore, the connector includes a hinge pin, and the bottom of both brackets is provided with a circular hole, through which the hinge pin passes.

[0013] Furthermore, the spacing between the opening positions of the connecting groove gradually decreases from the outside to the inside, forming a conical limiting part at the opening.

[0014] Furthermore, a boss is fixedly connected to the middle of the positive and negative screws, and two through holes are vertically opened at the outer edge of the boss.

[0015] Furthermore, the middle part of the support rod is fixedly connected to the middle part of the support body, so that both ends of the support rod have free parts that contact the alveolar bone.

[0016] In summary, this utility model has at least one of the following beneficial technical effects:

[0017] 1. This fan-shaped expander has two support bodies. The bottom of the two support bodies are rotatably connected by a connector, which allows the support bodies of the expander to gradually open to both sides along the axis of the connector, forming a fan-shaped opening trajectory. It can expand the user's anterior tooth area and is suitable for dental problems such as narrow maxillary anterior arch, crowded teeth, and specific types of malocclusion. It can effectively improve the practicality of the fan-shaped expander. By connecting the top of the two support bodies with an adjustment component, the use of the fan-shaped expander is more stable, which can ensure the practicality of the fan-shaped expander.

[0018] 2. This fan-shaped bow expander, through the provided connecting groove, facilitates the installation of the adjustment components. At the same time, the limiting part provided at the opening of the connecting groove can limit the rotating shaft after it is pressed into the connecting groove, thereby preventing the rotating shaft from coming out of the connecting groove, making the use of the fan-shaped bow expander more stable. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a fan-shaped bow expander according to the present invention.

[0021] Figure 2 This is a front view of a fan-shaped bow expander according to the present invention.

[0022] Figure 3This is a schematic diagram of the installation of a fan-shaped bow expander according to this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of a fan-shaped bow expander according to the present invention during bow expansion.

[0024] Figure 5 This is a schematic diagram of the connecting groove in a fan-shaped expander according to the present invention.

[0025] Figure 6 This is a schematic diagram of a general-purpose spiral expander.

[0026] In the figure, 1. Support body; 2. Support rod; 3. Adjustment component; 31. Positive and negative screws; 32. Rotating shaft; 4. Connecting part; 41. Hinge pin; 42. Round hole; 5. Connecting groove; 6. Threaded hole; 7. Limiting part; 8. Boss; 9. Through hole; 10. Free part. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Example:

[0029] Reference Figure 1 - Figure 6 The present invention discloses a fan-shaped bow expander, comprising:

[0030] The bracket body 1 has two parts. The bottoms of the two bracket bodies 1 are rotatably connected by connector 4, and the top is provided with a connecting groove 5.

[0031] Two support rods 2 are provided, and the two support rods 2 are fixedly connected to the two support bodies 1 respectively, for the expansion of the maxillary dental arch;

[0032] Adjustment component 3 is disposed between two support bodies 1. Adjustment component 3 includes positive and negative screws 31 and rotating shafts 32. There are two rotating shafts 32, which are respectively connected to two connecting grooves 5. Threaded holes 6 are opened in the middle of the two rotating shafts 32. The two ends of the positive and negative screws 31 are threadedly connected to the two threaded holes 6.

[0033] In this embodiment, observation Figure 1 It can be observed that by setting up two support bodies 1, with support rods 2 connected to opposite sides of each support body 1, and the ends of the support rods 2 away from the support bodies 1 connected to dental wires or bands worn on the teeth, the support rods 2 can stably apply mechanical force to the alveolar bone or mid-palatal suture through the bands. Subsequently, by opening the support bodies 1, the two support rods 2 transmit the mechanical force to the alveolar bone or mid-palatal suture, promoting the lateral expansion of the dental arch.

[0034] And because commonly used bow expanders such as Figure 6As shown in the diagram, when the two frameworks 1 are separated, the orthodontic force is transmitted to the teeth through the four framework bars, which will expand the overall dental arch. It is only suitable for situations where the front and back teeth need to be expanded at the same time, and it is not suitable for situations where the dental arch is narrow, the front teeth are crowded, and the width of the back teeth is normal.

[0035] Therefore, observe Figure 1 and Figure 2 It can be observed that by rotatably connecting the bottoms of the two support bodies 1 via the connector 4, the support bodies 1 can rotate and open around the axis of the connector 4. At this time, the bow expander can function normally during use. Figure 3 Install as shown in the diagram, then when it is necessary to extend the bow, position the bow extender as shown. Figure 4 As shown in the diagram, the support body 1 gradually opens to both sides along the axis of the connector 4, forming a fan-shaped opening trajectory. This allows for expansion of the user's anterior tooth area and is suitable for dental problems such as narrow maxillary anterior arch, crowded teeth, and specific types of malocclusion. It can effectively improve the practicality of the fan-shaped expander.

[0036] Since the two support bodies 1 are rotatably connected, they are easily compressed and retracted after being opened, which weakens the mechanical force provided by the expander to the alveolar bone or palatal midline, affecting the expansion effect.

[0037] Therefore, further observation is needed. Figure 1 It can be seen that an adjustment component is provided at the top middle position of the two support bodies 1. The adjustment component 3 includes a positive and negative screw 31 and a rotating shaft 32. A connecting groove 5 is provided at the top of the support body 1. There are two rotating shafts 32. The two rotating shafts 32 are respectively connected to the two connecting grooves 5. A threaded hole 6 is provided in the middle of the two rotating shafts 32. The two ends of the positive and negative screw 31 are threadedly connected to the two threaded holes 6.

[0038] When it is necessary to open the fan-shaped expander, simply rotate the forward and reverse screws 31 to bring the two rotating shafts 32 closer together or further apart, thereby opening or closing the two support bodies 1. At the same time, the anti-reverse function of the threads can effectively support the support bodies 1, making the use of the fan-shaped expander more stable and ensuring its practicality.

[0039] In a further preferred embodiment of this utility model, such as Figure 2 As shown, the connector 4 includes a hinge pin 41, and the bottom of both bracket bodies 1 is provided with a round hole 42, and the hinge pin 41 passes through both round holes 42.

[0040] In this embodiment, by including a hinge pin 41 in the connector 4 and opening a round hole 42 at the bottom of each of the two bracket bodies 1, and having the hinge pin 41 pass through both round holes 42, the assembly of the fan-shaped bow expander can be made simpler and more convenient, thereby reducing the production cost of the fan-shaped bow expander.

[0041] In a further preferred embodiment of this utility model, such as Figure 5 As shown, the spacing between the openings of the connecting groove 5 gradually decreases from the outside to the inside, forming a conical limiting part 7 at the opening.

[0042] In this embodiment, by gradually reducing the spacing between the openings of the connecting groove 5 from the outside to the inside, a conical limiting part 7 is formed at the opening. This allows the connecting groove 5 to be quickly positioned by the flared opening of the conical limiting part 7 when the rotating shaft 32 is installed. Then, pressure is applied to press the rotating shaft 32 into the connecting groove 5, where it is then limited by the limiting part 7, thereby preventing the rotating shaft 32 from coming out of the connecting groove 5. This makes the installation of the fan-shaped expander simpler and more convenient, and its use more stable.

[0043] In a further preferred embodiment of this utility model, such as Figure 1 As shown, a boss 8 is fixedly connected to the middle of the positive and negative screws 31, and two through holes 9 are vertically opened at the outer edge of the boss 8.

[0044] In this embodiment, since the opening and closing of the fan-shaped expander is achieved by rotating the positive and negative screws 31, in order to make the rotation adjustment of the positive and negative screws 31 simpler and more convenient, the positive and negative screws 31 are made as follows: Figure 1 As shown in the figure, a boss 8 is fixedly connected to the middle of the positive and negative screws 31, and two through holes 9 are vertically opened at the outer edge of the boss 8.

[0045] When it is necessary to control the rotation of the positive and negative screws 31, a slender object such as a pin or a cylinder that can be inserted into the through hole 9 can be used. Then, the positive and negative screws 31 can be easily rotated by lever principle, which can effectively improve the installation efficiency of the fan-shaped expander and further enhance the practicality of the fan-shaped expander.

[0046] In a further preferred embodiment of this utility model, such as Figure 3 As shown, the middle part of the support rod 2 is fixedly connected to the middle part of the support body 1, so that the two ends of the support rod 2 form free parts 10 that contact the alveolar bone.

[0047] In this embodiment, by fixing the middle part of the support rod 2 to the middle part of the support body 1, and forming free parts 10 at both ends of the support rod 2 that are connected to dental wires or loops, the fan-shaped expander can be bent into a shape suitable for the patient's dental arch when in use. This allows the fan-shaped expander to provide multi-point support to the patient's dental arch, and the support force provided by the fan-shaped expander to the alveolar bone or palatal midline is more stable, thereby improving the expansion effect.

[0048] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A fan-shaped bow expander, characterized in that, include: The support body (1) has two parts. The bottom of the two support bodies (1) are rotatably connected by a connector (4), and the top is provided with a connecting groove (5). The support rod (2) is provided in two parts, and the two support rods (2) are fixedly connected to the two support bodies (1) respectively, for the expansion of the maxillary dental arch; The adjustment component (3) is set between the two support bodies (1). The adjustment component (3) includes a positive and negative screw (31) and a rotating shaft (32). There are two rotating shafts (32). The two rotating shafts (32) are respectively connected in two connecting grooves (5). The middle part of the two rotating shafts (32) is provided with a threaded hole (6). The two ends of the positive and negative screw (31) are threadedly connected to the two threaded holes (6).

2. The fan-shaped bow expander according to claim 1, characterized in that, The connector (4) includes a hinge pin (41), and the bottom of both bracket bodies (1) is provided with a round hole (42), and the hinge pin (41) passes through both round holes (42).

3. A fan-shaped bow expander according to claim 2, characterized in that, The spacing between the openings of the connecting groove (5) gradually decreases from the outside to the inside, so that a conical limiting part (7) is formed at the opening.

4. A fan-shaped bow expander according to claim 3, characterized in that, The positive and negative screws (31) are fixedly connected to a boss (8) in the middle, and two through holes (9) are vertically opened on the outer edge of the boss (8).

5. A fan-shaped bow expander according to claim 4, characterized in that, The middle part of the support rod (2) is fixedly connected to the middle part of the support body (1), so that the two ends of the support rod (2) have free parts (10) that contact the alveolar bone.

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