Removable appliance for end tooth grinding

Abstract

The utility model relates to a removable end molar pressing device, including setting in the base plate of palate, the snap ring of fixed on the base plate and fixed on the base plate's press down structure, the snap ring is covered on the canine or premolar, and the press down structure includes the force adding part and press down part, the force adding part is equipped with respectively setting in molar buccal tongue two sides two groups, and each group force adding part includes the loop spring, sleeve, side arm and vertical arm that connect gradually, and the loop spring is equipped with two extension arms, and two extension arms are fixedly connected with the base plate and sleeve respectively, and the side arm is connected in the sleeve slidingly, extrude the sleeve to make sleeve deformation, and the sleeve inner wall clamps the side arm, and the sleeve is fixedly relative with the side arm, the press down part sets up in the molar occlusal surface and includes the horizontal arm that connects two vertical arms, the loop spring exerts the downward force to the horizontal arm, and the horizontal arm acts on the molar and presses the molar down.

Description

Technical Field

[0001] This utility model relates to a removable terminal molar depressor, belonging to the field of orthodontic technology. Background Technology

[0002] Teeth can be lost due to cavities, periodontitis, trauma, or other reasons. If left untreated for a long time, the missing tooth will gradually elongate, and in severe cases, it may even bite the gum at the site of the missing tooth, resulting in insufficient space for restoration and making restoration difficult.

[0003] For elongated teeth, root canal treatment combined with crown restoration can be used to reduce tooth height. However, this method is often difficult for patients to accept due to its significant damage to the teeth. Alternatively, orthodontic treatment can be used to intrude the elongated teeth. Currently, the most common method for intruding elongated teeth is using micro-implant anchorage. For non-terminal molars, it is relatively easy to implant micro-implant anchorage mesially and distally. However, for terminal molars, due to anatomical limitations, implanting micro-implant anchorage distally is often difficult or carries a high risk of damage to important nerves and blood vessels. Terminal molar intrusion has become a challenging and painful point in clinical orthodontic treatment.

[0004] Currently, most methods for intruding terminal molars are adhesive fixed orthodontic treatments. These require the design of cast or 3D-printed metal traction hooks, combined with micro-implant anchorage screws. Furthermore, due to anatomical limitations, these methods often only treat maxillary terminal molar intrusion and cannot be used for mandibular elongated terminal molars. Existing terminal molar intrusion devices are often difficult for patients to remove themselves, resulting in poor comfort. Moreover, these treatments are expensive and require highly skilled orthodontists to operate. Utility Model Content

[0005] In order to solve the problems existing in the prior art, this utility model provides an indentation device that is easy to remove and suitable for the terminal molars of the upper and lower jaws.

[0006] To achieve the above objectives, the technical solution proposed by this utility model is as follows: a removable terminal molar depressor, comprising a base disposed on the palate, a retaining ring fixed on the base, and a depressor structure fixed on the base. The retaining ring is fitted onto the canine or premolar. The depressor structure includes a force-applying part and a depressor part. The force-applying part has two sets respectively disposed on the buccal and lingual sides of the molar. Each set of force-applying parts includes a coil spring, a sleeve, a side arm, and a vertical arm connected in sequence. The coil spring has two extension arms, which are fixedly connected to the base and the sleeve respectively. The side arm is slidably connected inside the sleeve. Squeezing the sleeve deforms the sleeve, clamping the side arm between the inner wall of the sleeve, and fixing the sleeve and the side arm relatively. The depressor part is disposed on the occlusal surface of the molar and includes a horizontal arm connecting the two vertical arms. The coil spring applies a downward depressor force to the molar through the horizontal arm, depressing the molar.

[0007] A further design of the above technical solution is as follows: the vertical arm is provided with a U-shaped bend.

[0008] The opening of the U-shaped bend is connected by a ligature wire.

[0009] The longitudinal section of the sleeve is elliptical.

[0010] The sleeve is a closed elliptical tube or an elliptical tube with a notch formed by bending a thin metal sheet.

[0011] The depressor also includes a gasket, one side of which matches the shape of the occlusal surface of the molar, and the other side is connected to the transverse arm.

[0012] The pad consists of two halves, inner and outer, and in use, at least one half is placed between the occlusal surface of the molar and the transverse arm.

[0013] Each half of the pad has a slot near the cross arm, and the cross arm is inserted into the slot.

[0014] The gasket is welded to the cross arm.

[0015] The clasp has an outwardly curved pushing part at the buccal side of the canine.

[0016] The advantages of this utility model's technical solution compared to the prior art are as follows:

[0017] The depressor of this invention is fixed by a base that fits against the upper or lower jaw and a clasp that is fitted onto the canines on both sides of the upper or lower jaw. This provides support for the force applied by the depressor structure. The fixed structure is simple to install and remove, and patients can operate it themselves, making it convenient for daily use.

[0018] Since the fixing structure of this indentation device is located on the canines and palate, the indentation device can be installed on the maxilla or mandible to perform indentation treatment on the terminal molars of the maxilla and mandible.

[0019] In this invention, the depressor is provided with a sleeve on both sides of the buccal and lingual sides of the molar. When in use, the side arm can be slid to adjust the mesial and distal position of the depressor according to the specific position of the molar. After adjustment, the sleeve is squeezed to deform and fix it, thereby adapting to the mesial and distal position of the molar.

[0020] In this invention, the vertical arms on both sides of the buccal and lingual sides of the molar are provided with U-shaped bends. By adjusting the size of the opening of the U-shaped bend, the height of the depressor connected to the vertical arm can be adjusted to adapt to the height of the molar. At the same time, as the orthodontic treatment progresses, the molar gradually decreases, and the depressor force generated by the coil spring on the molar gradually decreases. By narrowing the opening of the U-shaped bend and fixing it with ligature wire, the height of the depressor is reduced, which can increase the depressor force.

[0021] The pressing device of this utility model is equipped with a shim in the pressing part. Using a complete shim makes it easy to press down the molar as a whole; using a single shim can make the molar tilt lingually or buccally while pressing down the molar. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the usage state of the terminal molar depressor of this utility model;

[0023] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0024] Figure 3 This is a side view of the distal molar depressor of the present invention;

[0025] Figure 4 This is a schematic diagram of the cross-section of the sleeve and side arm in Example 1;

[0026] Figure 5 This is a schematic diagram of the cross-section of the sleeve and side arm in Example 2;

[0027] Figure 6 This is a schematic diagram showing the usage state of the gasket in Example 3;

[0028] Figure 7 This is a schematic diagram showing the usage state of the gasket in Example 4;

[0029] In the diagram: 1-base, 2-ring, 21-push part, 3-lowering structure, 31-coil spring, 32-sleeve, 33-side arm, 34-vertical arm, 341-U-shaped bend, 35-horizontal arm, 36-waist pad, 361-inner washer, 362-outer washer, 363-slot, 4-ligating wire. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example 1

[0031] The detachable terminal molar intrusion device of this embodiment, taking the maxilla as an example, is as follows: Figure 1 and Figure 3 As shown, it includes a base plate 1, a retaining ring 2, and a pressure-reducing structure 3, as follows: Figure 1 The base 1 is fitted to the upper palate (if the depressor is located on the lower jaw, it is fitted to the corresponding position on the lower jaw). The clasp 2 is fixed to the base 1 and fits onto the canines or premolars on both sides of the upper jaw (if the depressor is located on the lower jaw, it is fitted onto the canines or premolars on both sides of the lower jaw). The depressor structure 3 is fixed to the base 1. In this embodiment, the base 1 and the clasp 2 together provide support, and the fixation structure with the oral cavity and teeth is simple. Patients can remove and install it themselves, which is convenient for daily use and cleaning.

[0032] Combination Figure 2 As shown, the depressor structure 3 includes two parts corresponding to the two molars (or only one side may be provided according to the patient's actual needs). Each part includes a force-applying part and a depressor part. The force-applying part has two sets respectively located on the buccal and lingual sides of the molars. Each set of force-applying parts includes a coil spring 31, a sleeve 32, a side arm 33, and a vertical arm 34 connected in sequence. The coil spring 31 has two extension arms, which are fixedly connected to the base 1 and the sleeve 32 respectively. The side arm 33 is slidably connected. The vertical arm 34, attached to the sleeve 32, extends to the middle of the buccal and lingual side of the molar via the coil spring 31, sleeve 32, and side arm 33. The vertical arm 34 is positioned along the length of the molar. The depressor includes a horizontal arm 35 connecting the vertical arms 34 on both sides of the buccal and lingual sides. The horizontal arm 35 is positioned on the occlusal surface of the molar. The torque of the coil spring 31 is transmitted to the horizontal arm 35 via the sleeve 32, side arm 33, and vertical arm 34. The horizontal arm 35 applies a downward depressor force to the molar, depressing it. In this embodiment, the side arm 33, vertical arm 34, and horizontal arm 35 are formed by bending the same section of archwire.

[0033] Combination Figure 4 As shown, in this embodiment, the longitudinal section of the sleeve 32 is a closed ellipse (or a circle, etc.), and the inner hole size is slightly larger than the diameter of the side arm 33. By sliding the side arm 33 along the sleeve 32, the mesial and distal position of the vertical arm 34 can be adjusted so that the position of the vertical arm 34 is located in the middle of the buccal and lingual side of the molar. At this time, the outer wall of the sleeve 32 is squeezed with pliers or other tools to deform the sleeve 32. The inner wall of the sleeve 32 clamps the side arm 33, so that the sleeve 32 and the side arm 33 are relatively fixed, thereby fixing the vertical arm 34 and the horizontal arm 35 in the middle of the molar. When the patient removes and installs the sleeve himself, the position of the horizontal arm 35 can be kept unchanged. Example 2

[0034] This embodiment is a further design based on the scheme of Embodiment 1, such as... Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the vertical arm 34 is provided with a U-shaped bend 341. As the orthodontic treatment progresses, the molars will gradually decrease, and the depressing force exerted by the coil spring 31 on the molars will gradually decrease. In this embodiment, the distance of the opening of the U-shaped bend 341 can be reduced by applying pressure, thereby lowering the height of the horizontal arm 35 to accommodate the lowered molars, increasing the depressing force. The two ends of the opening of the U-shaped bend can be connected and fixed by the ligature wire 4 to maintain the height of the horizontal arm 35 and maintain the depressing force. In the initial stage of use, the size of the opening of the U-shaped bend 341 can also be adjusted to accommodate the height of the molars.

[0035] In this embodiment, the clasp 2 is provided with a pusher 21 that bends outward at the buccal side of the canine, and the pusher 21 can be pushed to operate when removing and installing.

[0036] like Figure 5As shown, in this embodiment, the cannula is made of a thin metal sheet bent into an elliptical tube with a notch in its longitudinal section, which facilitates clinical fabrication. The method of use and function are the same as in Embodiment 1. Example 3

[0037] This embodiment is a further design based on the scheme of Embodiment 1, such as... Figure 6 As shown, the pressing part in this embodiment also includes a pad 36 disposed between the occlusal surface of the molar and the transverse arm 35. The shape of the pad 36 on the side near the molar matches the occlusal surface of the molar, and the other side is welded to the transverse arm 35, which facilitates the overall pressing of the molar. Example 4

[0038] This embodiment is a further design based on the scheme of Embodiment 3, such as... Figure 7 As shown, the gasket includes two halves, an inner gasket 361 and an outer gasket 362. Each half of the gasket has a slot 363 on the side near the cross arm, and the cross arm 35 is embedded in the slot and fixed to the gasket.

[0039] When in use, both pads can be placed on the occlusal surface of the molars to press down the molars as a whole. Alternatively, an inner pad 361 or an outer pad 362 can be placed to press down the molars while causing them to tilt lingually or buccally.

[0040] The technical solutions of this utility model are not limited to the above embodiments. All technical solutions obtained by equivalent substitution fall within the scope of protection claimed by this utility model.

Claims

1. A removable terminal molar depressor, characterized in that: The device includes a base mounted on the palate, a retaining ring fixed to the base, and a depressor structure fixed to the base. The retaining ring is fitted onto a canine or premolar. The depressor structure includes a force-applying part and a depressor part. The force-applying part has two sets respectively located on the buccal and lingual sides of the molar. Each set of force-applying parts includes a coil spring, a sleeve, a lateral arm, and a vertical arm connected in sequence. The coil spring has two extension arms, which are fixedly connected to the base and the sleeve respectively. The lateral arm is slidably connected inside the sleeve. Squeezing the sleeve deforms the sleeve, clamping the lateral arm with the inner wall of the sleeve, and fixing the sleeve and the lateral arm relative to each other. The depressor part is located on the occlusal surface of the molar and includes a transverse arm connecting the two vertical arms. The coil spring applies a downward depressor force to the molar through the transverse arm, depressing the molar.

2. The removable terminal molar depressor according to claim 1, characterized in that: The vertical arm has a U-shaped bend.

3. The removable terminal molar depressor according to claim 2, characterized in that: The opening of the U-shaped bend is connected by a ligature wire.

4. The removable terminal molar depressor according to claim 1, characterized in that: The longitudinal section of the sleeve is elliptical.

5. The removable terminal molar depressor according to claim 4, characterized in that: The sleeve is a closed elliptical tube or an elliptical tube with a notch formed by bending a thin metal sheet.

6. The removable terminal molar depressor according to claim 1, characterized in that: The depressor also includes a gasket, one side of which matches the shape of the occlusal surface of the molar, and the other side is connected to the transverse arm.

7. The removable terminal molar depressor according to claim 6, characterized in that: The pad consists of two halves, inner and outer, and in use, at least one half is placed between the occlusal surface of the molar and the transverse arm.

8. The removable terminal molar depressor according to claim 7, characterized in that: Each half of the pad has a slot near the cross arm, and the cross arm is inserted into the slot.

9. The removable terminal molar depressor according to claim 6, characterized in that: The gasket is welded to the cross arm.

10. The removable terminal molar depressor according to any one of claims 1 to 9, characterized in that: The clasp has an outwardly curved pushing part at the buccal side of the canine.

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