Oral cast fixed expander key

Abstract

The utility model discloses a key of oral cavity casting type fixed expansion arch device, relates to a dental instrument accessory, which comprises antiskid handle, stainless steel silk connecting body, screw rod, nut and stainless steel silk force adding structure, the screw rod is located the top of antiskid handle, and both are perpendicular to each other, the both ends of screw rod are connected in the top of antiskod handle through stainless steel silk connecting body, the nut is sleeved on the screw rod, and both are through thread cooperation, stainless steel silk force adding structure is fixedly welded on the nut, and stainless steel silk force adding structure is equipped with a round winding at 2mm from the top end. The utility model has the advantages of strong practicability, high convenience, good safety, can significantly improve the stability and efficiency of fixed expansion arch device force adding, and is more suitable for the force adding adjustment demand of fixed expansion arch device.

Description

Technical Field

[0001] This utility model relates to a dental instrument accessory, and more particularly to a force-applying key for an intraoral cast-type fixed spiral expander. Background Technology

[0002] Cast fixed expanders are a common orthodontic appliance used for cases of severe crowding or width discrepancies, and posterior crossbite. They open the midpalatal suture by applying force with a spiral expander, promoting new bone formation and increasing the width of the basal bone and dental arch to address crowding or width discrepancies between the upper and lower jaws. For patients with maxillary hypoplasia, an additional anterior traction device can be used in conjunction with the spiral expander's alternating expansion and contraction forces to stimulate jawbone development. Expanders typically require the expander key to be inserted into the application port and rotated from front to back or back to front to apply force.

[0003] Traditional bow expander keys typically consist of a short stainless steel wire and a triangular handle. This design has the following problems:

[0004] During the application of force, the stainless steel wire is prone to slipping out of the adjustment hole, which can easily damage the oral mucosa;

[0005] Because of its small size and the fact that it is easy to slip off when held, it poses a risk of aspiration or swallowing.

[0006] It is inconvenient to operate inside the mouth, and the hand entering the mouth when applying force can easily cause nausea and discomfort to the patient.

[0007] The lack of effective fixation and guidance for the key leads to uneven adjustment force, which may affect the bow expansion effect.

[0008] Therefore, there is an urgent need for a more stable and easier-to-operate fixed bow expander key to improve the stability, safety, convenience, comfort, and accuracy of force application. Utility Model Content

[0009] This invention provides a dental cast-type fixed expander key, which aims to solve the problems of unstable structure and inconvenient operation of traditional keys.

[0010] This utility model is achieved through the following technical solution:

[0011] A cast-type fixed expander key for oral cavity includes a non-slip handle and a stainless steel wire connector; it also includes a screw, a nut, and a stainless steel wire force-increasing structure.

[0012] The screw is located above the anti-slip handle, and the two are perpendicular to each other; the two ends of the screw are connected to the top of the anti-slip handle by stainless steel wire connectors; the nut is fitted on the screw, and the two are threaded together; the stainless steel wire tensioning structure is fixedly welded to the nut; the stainless steel wire tensioning structure has a circular loop 2mm from the top.

[0013] Furthermore, the main body of the stainless steel wire reinforcement structure is stainless steel wire; the circular loop is formed by bending and looping stainless steel wire.

[0014] Furthermore, the stainless steel connector is formed by folding a stainless steel wire in half; the top of the folded stainless steel wire is an open flare; the screw is mounted in the flare and fixedly connected to both ends of the folded stainless steel wire.

[0015] Furthermore, the folded stainless steel wire includes a flared section at the top and a handle mounting section below the flared section; the anti-slip handle is fixedly connected to the handle mounting section.

[0016] Furthermore, the top edge of the stainless steel wire connector, screw, and anti-slip handle forms an inverted trapezoidal structure.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] Stable Structure: Through the threaded engagement of the screw and nut, the stainless steel wire reinforcement structure can move stably along the screw, avoiding the deformation or breakage problems caused by uneven force distribution in traditional keys. The stainless steel wire connector and the screw form an inverted trapezoidal structure, which is stable and not easily deformed.

[0019] Anti-slip design: The long, textured, anti-slip handle is easy for the operator to grip and does not easily slip, avoiding the risk of accidental aspiration or swallowing. Furthermore, the circular loop on the stainless steel wire tensioning structure effectively prevents the wire from extending beyond the tensioning hole and injuring the oral mucosa. It also increases the contact area with the tensioning hole of the spiral expander, effectively preventing the stainless steel wire from slipping out of the tensioning hole during adjustment, thus improving safety and operational efficiency.

[0020] Easy to operate: When applying force, the non-slip handle is held outside the mouth. Pushing or pulling force is used to rotate the nut to expand or contract the bow, avoiding nausea and discomfort for the patient. When applying force from front to back, the stainless steel wire force-applying structure of the nut is aligned with the handle. Pushing force causes the nut to rotate, driving the stainless steel wire force-applying structure backward to apply force. When contracting the bow from back to front, the stainless steel wire force-applying structure is at a 90° angle to the plane formed by the handle and screw, inserted into the force-applying hole. Pulling force rotates the nut to apply force. This device provides even force adjustment, improving comfort, ease of operation, and precision.

[0021] Integrated design: The circular loop and stainless steel wire reinforcement structure are made from the same stainless steel wire, which simplifies the manufacturing process and enhances the integrity and durability of the structure.

[0022] This invention is highly practical, convenient, and safe, and can significantly improve the stability and efficiency of the force application of the fixed bow expander, making it more suitable for the force adjustment needs of the fixed bow expander. Attached Figure Description

[0023] Figure 1 This is an overall structural diagram of this embodiment.

[0024] Figure 2 yes Figure 1 A partial structural diagram.

[0025] In the picture: 1. Handle mounting section, 2. Stainless steel wire connector, 3. Screw, 4. Nut, 5. Coil, 6. Stainless steel wire tensioning structure, 7. Anti-slip handle. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0027] Reference Figure 1 and Figure 2 This embodiment uses a 1.2mm diameter stainless steel wire, a 0.9mm diameter stainless steel wire, an anti-slip handle, a screw, and a nut.

[0028] The longer stainless steel wire with a diameter of 1.2 mm is named stainless steel wire a, and the shorter stainless steel wire with a diameter of 0.9 mm is named stainless steel wire b.

[0029] After folding stainless steel wire a in half, insert it into the non-slip handle for easy gripping. The top of the handle is the two ends of stainless steel wire a, which form an inverted trapezoidal flare. Then, weld the two ends of the screw to the two ends of stainless steel wire a respectively. Note that the nut should be installed on the screw before welding the stainless steel wire tensioning structure to the screw.

[0030] The flared opening at the top of the folded stainless steel wire a is the stainless steel wire connector; the screw is mounted in the flared opening and is fixedly connected to both ends of the folded stainless steel wire a.

[0031] The stainless steel wire b is bent into a tensioning structure, approximately 15mm in length. A 2mm diameter circular loop is bent 2mm from the tip of the tensioning structure to prevent it from protruding through the tensioning hole and injuring the oral mucosa. The tensioning structure is welded to a nut. The nut and tensioning structure allow for easy rotation and tension application, preventing the operator's hand from entering the patient's mouth and causing nausea or discomfort.

[0032] In this embodiment, when in use, the anti-slip handle is always outside the mouth. When applying force from front to back, the stainless steel wire force-applying structure of the nut is aligned with the handle. The pushing force causes the nut to rotate, which in turn rotates the stainless steel wire force-applying structure backward to apply force. When retracting the bow from back to front, the stainless steel wire force-applying structure forms a 90° angle with the plane formed by the handle and the screw. It is then inserted into the force-applying hole, and the pulling force causes the nut to rotate and apply force.

[0033] It should be noted that the above description is merely a preferred application example of this utility model and is not intended to limit the scope of protection of this utility model. All technical solutions employing equivalent substitutions or equivalent transformations are within the scope of protection of this utility model.

Claims

1. A key for a cast-type fixed expander for oral cavity, comprising a non-slip handle and a stainless steel wire connector; characterized in that, It also includes screws, nuts, and stainless steel wire reinforcement structures; The screw is located above the anti-slip handle, and the two are perpendicular to each other; the two ends of the screw are connected to the top of the anti-slip handle by stainless steel wire connectors; the nut is fitted on the screw, and the two are threaded together; the stainless steel wire tensioning structure is fixedly welded to the nut; the stainless steel wire tensioning structure has a circular loop 2mm from the top.

2. The dental cast-type fixed expander key according to claim 1, characterized in that, The main body of the stainless steel wire reinforcement structure is stainless steel wire; the circular loop is formed by bending and winding stainless steel wire.

3. The dental cast-type fixed expander key according to claim 1, characterized in that, The stainless steel connector is formed by folding a stainless steel wire in half; the top of the folded stainless steel wire is an open flare; the screw is mounted in the flare and fixedly connected to both ends of the folded stainless steel wire.

4. The dental cast-type fixed expander key according to claim 3, characterized in that, The folded stainless steel wire includes a flared section at the top and a handle mounting section below the flared section; the anti-slip handle is fixedly connected to the handle mounting section.

5. A dental cast-type fixed expander key according to claim 3, characterized in that, The top edge of the stainless steel wire connector, screw, and anti-slip handle forms an inverted trapezoidal structure.

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