A pre-torqued helical expansion arch

Abstract

This utility model discloses a pre-force spiral expander, relating to the field of orthodontic appliance technology. It includes bases located on both sides, with several sleeves between the bases on both sides. Each sleeve consists of an outer tube and an inner tube. The inner tube slides within the outer tube and extends out of the outer tube. The end of the inner tube is fixedly connected to the base on the same side, and the end of the outer tube is fixedly connected to the base on the other side. A push spring is provided between the end face of the inner tube and the end face of the outer tube, and the push spring has several coils. This design improves the convenience and accuracy of force application, enhances treatment safety and efficiency, and increases technical flexibility and adaptability.

Description

Technical Field

[0001] This utility model relates to the field of orthodontic device technology, specifically to a pre-forced spiral expander. Background Technology

[0002] The spiral expander is a common orthodontic appliance component in orthodontic treatment. It mainly consists of two parallel bases, two metal shafts, an adjusting screw, and adjusting rings. Its working principle involves attaching the spiral expander to the tooth via a frame or resin base. Rotating the spiral hole opens the expander, thereby transmitting corrective or orthodontic forces through the resin base or frame to the tooth and alveolar bone. This opens the midpalatal suture and / or widens the width of the upper and lower dental arches, improving the morphology of the upper dental arch and alleviating upper dentition malocclusion.

[0003] The adjustment of traditional spiral amplifiers relies on the doctor's experience and lacks a quantitative reading mechanism, which is prone to errors, resulting in decreased accuracy and thus the treatment effect not meeting expectations.

[0004] Traditional spiral expanders use linear wire structures for adjustment, which need to be inserted into the oral cavity, posing a risk of puncturing the palatal mucosa.

[0005] Furthermore, the traditional method of operating the spiral bore of a spiral amplifier can lead to insufficient or excessive adjustment in scenarios where the user or a patient's caregiver adjusts the device, potentially causing harm to the patient.

[0006] The above problems are all derived from the existing spiral bow expanders, which require the operation of rotating the spiral hole through a lock pick. Utility Model Content

[0007] Purpose of the utility model: The technical problem to be solved by this utility model is to provide a pre-forced spiral expander, which solves the problem that the expansion force of the existing spiral expander is not easy to adjust.

[0008] Technical solution

[0009] To solve the above problems, the technical solution provided by this utility model is as follows:

[0010] A pre-forced spiral expander includes bases on both sides, with a plurality of sleeves between the bases on both sides. Each sleeve consists of an outer tube and an inner tube, with the inner tube sliding inside the outer tube and extending out of the outer tube. The end of the inner tube is fixedly connected to the base on the same side, and the end of the outer tube is fixedly connected to the base on the other side. A push spring is provided between the end face of the inner tube and the end face of the outer tube, and the push spring has a plurality of spring coils.

[0011] Furthermore, the spring coil assembly is formed by locking together a plurality of locking rings disposed on the push spring.

[0012] Furthermore, the locking ring assembly consists of locking rings evenly distributed on the push spring.

[0013] Furthermore, the locking ring tightens and fixes several adjacent spring coils on the push spring.

[0014] Furthermore, the outer tube is provided with an operation window corresponding to the locking ring.

[0015] Furthermore, the base is provided with several support rods, and the support rods are fixedly provided with belt rings.

[0016] Furthermore, the push spring is a nickel-titanium push spring.

[0017] Furthermore, the outer tube is provided with several equally spaced slots, and pins are inserted into the slots.

[0018] Furthermore, the pin is made of medical-grade stainless steel or titanium alloy.

[0019] Beneficial effects

[0020] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0021] 1. Improved Ease and Precision of Force Application: The constant-force nickel-titanium push spring, as a pre-force reserve device, combined with a modular design featuring multiple units arranged in parallel, replaces the complex operation of traditional spiral amplifiers that rely on manual screw rotation, significantly simplifying the force application process. The nickel-titanium alloy possesses superelasticity and shape memory properties, maintaining a stable force output within a certain deformation range. This reduces the problem of over- or under-force application caused by human operation, accurately outputting the continuous force required to expand the palatal suture, overcoming the shortcomings of traditional spiral amplifiers that suffer from low force control accuracy due to a lack of standardized scales and component wear.

[0022] 2. Improved Treatment Safety and Efficiency: Traditional spiral expanders may cause risks such as adjustment ring jamming and screw twisting due to force deviation, leading to dental arch asymmetry. This technology, through optimized design, reduces complications caused by improper operation, thus improving treatment safety. Precise force control also makes arch expansion treatment more consistent with expectations, avoiding repeated adjustments due to force issues, shortening the treatment cycle, and improving treatment efficiency.

[0023] 3. Enhanced technical flexibility and adaptability: The modular design allows for flexible adjustment of the number of force units based on individual patient differences (such as the degree of closure of the palatal midline and the size of the expansion required), enabling personalized treatment plans. Compared with traditional single-structure spiral expanders, it can better adapt to the conditions of different patients and improve treatment outcomes. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0025] Figure 2 This is a schematic diagram of the unfolded push spring in the sleeve of Embodiment 1 of this utility model;

[0026] Figure 3 This is a schematic diagram of the push spring forming a spring coil set in the sleeve of Embodiment 1 of this utility model;

[0027] Figure 4 This is a cross-sectional view of the sleeve in Embodiment 1 of this utility model;

[0028] Figure 5 This is a schematic diagram of a push spring forming a spring coil set in another embodiment of the sleeve of Embodiment 1 of this utility model;

[0029] Figure 6 This is a cross-sectional view of another embodiment of the sleeve of Embodiment 1 of this utility model. Detailed Implementation

[0030] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] Combined with appendix Figure 1-6 A pre-forced spiral expander includes a base 1 arranged side by side on both sides. Each base 1 has a support rod 2 facing the teeth on the same side. The support rod 2 has a band 3 that connects to the teeth in the patient's mouth. One side of the support rod 2 is fixedly connected to the band 3 and fitted onto the patient's teeth. The other side of the support rod 2 is fixed to the base 1. In other embodiments, the band 3 can be replaced with other forms of tooth clasps, preferably Y-shaped support frames or brackets.

[0033] A sleeve 4 is provided between the two bases 1 located on both sides. The sleeve 4 is connected between the two bases 1 in a parallel and side-by-side manner. The sleeve 4 is composed of an outer tube 42 and an inner tube 41. The outer tube 42 and the inner tube 41 are fixedly connected to the two bases 1 on both sides respectively. The outer tube 42 has a hollow structure and a sliding space inside. The side of the outer tube 42 has symmetrically arranged operation windows that communicate with the sliding space, so that the patient can operate the components set in the sliding space inside the outer tube 42 through the operation windows. The inner tube 41 is slidably installed in the sliding space of the outer tube 42. The inner tube 41 slides from one side of the base 1 toward the other side of the base 1. The inner tube 41 slides in the sliding space of the outer tube 42 and one end of the inner tube 41 extends out of the outer tube 42. The end of the inner tube 41 located outside the outer tube 42 is fixed to the base 1 on the same side, and the end of the outer tube 42 away from the inner tube 41 is fixed to the base 1 on the other side.

[0034] A limiting rod 43 is fixedly provided on the end wall of the outer tube 42 on the side away from the inner tube 41 within the sliding space. The limiting rod 43 is inserted into the inner tube 41 from the end wall of the sliding space. The inner tube 41 is sleeved on the limiting rod 43 and slides. The limiting rod 43 plays a limiting role in the inner tube 41, so that it can only slide along the straight direction of the limiting rod 43.

[0035] A push spring 44 is provided between one end of the inner tube 41 located within the sliding space of the outer tube 42 and the end wall of the sliding space away from the inner tube 41. One end of the push spring 44 abuts against the end face of the inner tube 41, and the other end abuts against the end wall of the sliding space. The push spring 44 is preferably a nickel-titanium push spring 44. When subjected to force, the nickel-titanium push spring undergoes large elastic deformation and can generate a continuous and stable thrust.

[0036] The push spring 44 is a thrust spring 44. The thrust of the push spring 44 pushes the outer tube 42 and the inner tube 41 to the sides, causing the inner tube 41 and the outer tube 42 to move to the sides, thereby further pushing the base 1 located on both sides to move towards the teeth on both sides, thereby moving the teeth on both sides towards the buccal side through the support rod 2 and the band ring 3 installed on the support rod 2.

[0037] The push spring 44 is provided with several sets of locking rings. The locking rings consist of several locking rings 45. The locking rings 45 store the thrust of the push spring 44 in segments. The locking rings 45 lock several adjacent spring coils. The several locking rings 45 can divide the push spring 44 into multiple spring coil sets. Each spring coil set is locked by a set of locking rings 45. The spring coils locked by the locking rings 45 cannot release the elastic force.

[0038] The locking ring 45 is formed by winding and fixing a soft wire. By inserting the wire into the push spring 44, several adjacent spring coils are pulled close to each other, thereby winding and fixing the wire to form a locking ring 45. Each spring coil set is fixed by at least two locking rings 45, and at least two locking rings 45 are evenly distributed on each spring coil set.

[0039] The operating window on the outer tube 42 corresponds to the position of the locking ring 45, thus facilitating the opening operation of the locking ring 45.

[0040] Multiple coil sets are formed on the push spring 44, which can segment the thrust of the push spring 44 and release the thrust of the push spring 44 segment by opening the locking ring 45 on the coil set.

[0041] When the push spring 44 is compressed and mounted on the expander, it attempts to return to its original shape, thereby generating a continuous outward pushing force on the bone on both sides of the mid-palatal suture. This hyperelasticity allows the push spring 44 to provide a relatively constant force value within a certain deformation range, ensuring the stability of the expanding force and facilitating the gradual opening of the mid-palatal suture.

[0042] In other embodiments, the push spring 44 is formed into multiple coil sets using pins 49, thereby releasing the force of the push spring in segments. When the coil sets are formed using pins 49, the operation window and limit rod can be removed from the outer tube.

[0043] The cannula 4 has a cylindrical or flat structure and is made of high-strength medical-grade stainless steel or titanium alloy to ensure biocompatibility and mechanical strength.

[0044] Multiple equally spaced slots are formed along the axial direction on the outer tube 42. The position of the slots is precisely designed to determine the number of segments of the push spring 44 as needed. The shape of the slots corresponds to the pin 49, facilitating the sliding in and locking of the pin and its removal and unlocking.

[0045] When the push spring 44 inside the sleeve 4 is not in use, there are several sets of spring coils on the push spring 44. During use, the bow expander opens the sets of spring coils on the push spring 44 one by one, thereby releasing the pushing force of the push spring 44 to both sides. By opening the sets of spring coils of the push spring 44 one by one, the elastic force of the push spring 44 is gradually increased in segments to meet the usage requirements of the bow expander.

[0046] The spring coil set is formed by the locking ring 45. The locking ring 45 is cut open to open the housing. The spring coil set is formed by the pin 49. The pins 49 are pulled out in the order closest to the inner tube 42.

[0047] Depending on the patient's condition, the number of spring coils in push spring 44 can be adjusted to flexibly adjust the treatment stage.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pre-forced spiral expander, characterized in that, The device includes bases located on both sides, with several sleeves between the bases on both sides. Each sleeve consists of an outer tube and an inner tube. The inner tube slides inside the outer tube and extends out of the outer tube. The end of the inner tube is fixedly connected to the base on the same side, and the end of the outer tube is fixedly connected to the base on the other side. A push spring is provided between the end face of the inner tube and the end face of the outer tube, and the push spring has several sets of spring coils.

2. The pre-forced spiral expander according to claim 1, characterized in that, The spring coil assembly is formed by locking together a plurality of locking rings disposed on the push spring.

3. A pre-forced spiral expander according to claim 2, characterized in that, The locking ring assembly consists of locking rings evenly distributed on the push spring.

4. A pre-forced spiral expander according to claim 3, characterized in that, The locking ring is formed by tightening and fixing several adjacent spring coils on the push spring.

5. A pre-forced spiral expander according to claim 4, characterized in that, The outer tube is provided with an operation window corresponding to the locking ring.

6. A pre-forced spiral expander according to claim 1, characterized in that, The base is provided with several support rods, and the support rods are fixed with belt rings.

7. A pre-forced spiral expander according to claim 1, characterized in that, The push spring is a nickel-titanium push spring.

8. A pre-forced spiral expander according to claim 1, characterized in that, The outer tube is provided with several equally spaced slots, and a pin is inserted into each slot.

9. A pre-forced spiral expander according to claim 8, characterized in that, The pin is made of medical-grade stainless steel or titanium alloy.

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