CN109820606B

CN109820606B - crown remover

Info

Publication number: CN109820606B
Application number: CN201910140887.7A
Authority: CN
Inventors: 谢春; 程波; 戴琳; 韩传火; 杜露阳
Original assignee: Individual
Current assignee: Union Hospital Tongji Medical College Huazhong University of Science and Technology
Priority date: 2019-02-26
Filing date: 2019-02-26
Publication date: 2020-04-14
Anticipated expiration: 2039-02-26
Also published as: CN109820606A

Abstract

The invention provides a crown remover, which relates to the field of oral auxiliary medical instruments and comprises a clamping part and a handle, wherein a slide block device for generating impact force is arranged on the handle; the clamping part is a claw structure for clamping the dental crown, at least one rotatable movable claw is arranged, and a locking mechanism for locking the rotation angle of the movable claw is also arranged. By adopting the combination of the movable claws and the locking mechanism, the clamping part can be reliably and fixedly connected with the dental crown to avoid falling off, the dental crown can be prevented from being damaged, and the crown falling-off effect is improved. The structure of the limiting arm and the wedge-shaped ring can reliably limit the rotating angle of the movable claw, so that the clamping is reliable, and the operation is very convenient. The provided air bag structure can better fit the dental crown, particularly, the air bag and the dental crown have very reliable binding force through inflation, and the dental crown is prevented from falling off from the clamping part.

Description

Crown remover

Technical Field

The invention relates to the field of oral auxiliary medical instruments, in particular to a crown remover for removing a crown from a tooth root.

Background

After the tooth is damaged, particularly after the root canal therapy is performed, the scheme that the tooth is repaired and the chewing function is recovered is effective by installing the dental crown. Teeth are usually ground into square cylindrical roots, which are then fitted over and then cemented together. But it is very inconvenient when the crown needs to be removed for adjustment during the operation. A crown extractor in the prior art is a rod with a barb, a sliding weight block is arranged on the rod, and the barb is hooked on a tooth crown and knocked by the sliding weight block to realize crown removal operation. There is a problem that the position on the crown for hooking is small, and the crown is easy to slip off or the barb easily damages the crown. When the crown is not taken, only the crown breaking treatment can be adopted. In the operation process, one hand is required to hold the handle, and the other hand slides the weight to perform knocking, so that the operation is inconvenient.

Chinese patent document CN107411829A describes a crown extractor, which adopts a combination of two crown-extracting hooks to fix a crown. This solution also has the problem of being liable to damage the crown and it uses a flexible cord to transmit the oscillating force, which is not highly feasible due to its own deformation.

Disclosure of Invention

The invention aims to provide a crown remover which can reliably clamp a crown, avoid the crown from falling off and improve the crown removing effect. In the preferred scheme, one-hand operation can be realized, and the operation is very convenient.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a crown remover comprises a clamping part and a handle, wherein a sliding block device for generating impact force is arranged on the handle;

the clamping part is a claw structure for clamping the dental crown, at least one rotatable movable claw is arranged, and a locking mechanism for locking the rotation angle of the movable claw is also arranged.

In the preferred scheme, the movable claw is rotatably connected with the handle through a pin shaft, one side of the movable claw, which faces the handle, is provided with a limiting arm, and the handle is provided with a wedge-shaped ring which moves along the handle and is used for propping against the limiting arm.

In the preferred scheme, the wedge-shaped ring is in threaded connection with the handle;

or the wedge-shaped ring is connected with the handle in a sliding manner, and one end of the wedge-shaped ring, which is far away from the movable claw, is provided with a limiting nut which is in threaded connection with the handle.

In a preferable scheme, the number of the movable claws is one, fixed claws are arranged at the positions corresponding to the movable claws, and the fixed claws are fixedly connected with the handle;

or, the number of the movable claws is two, and the two movable claws are oppositely arranged.

In a preferable scheme, an air bag is arranged on the inner side of the claw structure, which is in contact with the dental crown, the air bag is connected with an inflation tube through an air duct, and the air bag is filled with a high-pressure medium to deform and wrap the dental crown.

In a preferable scheme, a barb tooth structure is arranged on one surface of the air bag facing to the dental crown.

In the preferred scheme, the bottom of the handle is connected with the tail of the handle through a sliding rod, and the sliding block is slidably arranged on the sliding rod.

In a preferable scheme, the bottom and/or the tail of the handle is/are provided with an electromagnet, and the sliding block is provided with a permanent magnet.

In the preferred scheme, a first electromagnet is arranged at the bottom of the handle, a second electromagnet is arranged at the tail of the handle, and the sliding block is provided with a permanent magnet;

the winding directions of the coils of the first electromagnet and the second electromagnet are opposite, so that the magnetic poles of the first electromagnet and the second electromagnet after being electrified are opposite;

the first electromagnet and the second electromagnet are electrically connected with the switch reversing circuit.

In a preferred scheme, one end of the sliding block, which is close to the handle, is provided with a buffer pad.

The invention provides a crown remover, which can reliably and fixedly connect a clamping part with a dental crown by adopting the combination of a movable claw and a locking mechanism, avoid falling off, avoid damaging the dental crown and improve the crown removing effect. The structure of the limiting arm and the wedge-shaped ring can reliably limit the rotating angle of the movable claw, so that the clamping is reliable, and the operation is very convenient. The provided air bag structure can better fit the dental crown, particularly, the air bag and the dental crown have very reliable binding force through inflation, and the dental crown is prevented from falling off from the clamping part. The electromagnetic driving sliding block device can be operated by a single hand, and the operation difficulty is reduced.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partially enlarged schematic structural view of the slider device according to the present invention.

Fig. 3 is a partially enlarged view of the holding portion of the present invention.

Fig. 4 is a schematic structural diagram of the switching commutation circuit of the present invention.

In the figure: the movable jaw comprises a movable jaw 1, a fixed jaw 2, a pin shaft 3, a limiting arm 4, a wedge-shaped ring 5, a limiting nut 6, a handle 7, a sliding block 8, a permanent magnet 81, a buffer pad 82, a silencing ring 83, a handle tail part 9, an inflation tube 10, a dental crown 11, a dental root 12, an air bag 13, an air guide tube 14, a sliding rod 15, a first electromagnet YA1 and a second electromagnet YA 2.

Detailed Description

As shown in figure 1, the crown remover comprises a clamping part and a handle 7, wherein a sliding block 8 device for generating impact force is arranged on the handle;

the clamping part is a claw structure for clamping the dental crown 11, at least one rotatable movable claw 1 is arranged, and a locking mechanism for locking the rotation angle of the movable claw 1 is also arranged. With the structure, the dental crown is locked in a clamping mode, and the dental crown is prevented from being damaged by the barb. It is further preferable that an anti-slip material such as silicon rubber is provided on the inner walls of the holding portions such as the movable claws 1 and the fixed claws 2 which are in contact with the crown of the tooth, to further improve the holding firmness.

In a preferred scheme, as shown in fig. 3, the movable claw 1 is rotatably connected with a handle 7 through a pin shaft 3, a limit arm 4 is arranged on one side of the movable claw 1 facing the handle 7, the inner side surface of the limit arm 4 is preferably an inclined plane or an inclined arc surface, a wedge-shaped ring 5 which moves along the handle 7 and is used for supporting the limit arm 4 is arranged on the handle 7, and the structure of the wedge-shaped ring 5 is shown in fig. 3 and has an outer inclined plane or an inclined arc surface. With this structure, the angle of rotation of the movable claw 1 is limited by the axial displacement of the wedge ring 5 to ensure the reliable gripping of the movable claw 1 to the dental crown 11. While also serving to give sufficient clamping force.

In a preferred scheme, the wedge-shaped ring 5 is in threaded connection with the handle 7; the axial displacement of the wedge ring 5 is achieved by rotating the wedge ring 5.

Another alternative is shown in fig. 1, or the wedge-shaped ring 5 is connected with the handle 7 in a sliding manner, and a limit nut 6 is arranged at one end of the wedge-shaped ring 5 away from the movable claw 1, and the limit nut 6 is connected with the handle 7 in a threaded manner. The axial displacement of the wedge-shaped ring 5 is realized by rotating the limit nut 6, and the axial position of the wedge-shaped ring 5 is locked. This scheme is used in this example.

The preferable scheme is as shown in fig. 3, the number of the movable claws 1 is one, the fixed claws 2 are arranged at the positions corresponding to the movable claws 1, and the fixed claws 2 are fixedly connected with the handle 7;

in another alternative, two movable claws 1 are provided, and the two movable claws 1 are arranged oppositely.

In a preferred scheme, as shown in figure 3, a balloon 13 is arranged on the inner side of the claw structure contacting with the dental crown 11, and the balloon 13 is connected with an inflation tube 10 through an air guide tube 14. With this structure, the air bag 13 is filled with high-pressure air, so that the air bag 13 is deformed to wrap the crown 11, thereby further ensuring the clamping reliability. But the structure can also adapt to the shape of different crowns. Optionally, the medium filled in the air bag 13 is water or viscous hydraulic oil.

In a preferred scheme, the side of the air bag 13 facing the dental crown 11 is provided with a barb structure. With this structure, the clamping effect can be further improved after the inflation of the airbag 13.

In a preferred scheme, the whole clamping part is connected with the handle 7 in a detachable mode so as to replace different clamping parts and adapt to dental crowns 11 with different specifications.

Preferably, as shown in fig. 2, the bottom of the handle 7 is connected to the handle tail 9 through a sliding rod 15, and the sliding block 8 is slidably mounted on the sliding rod 15.

Preferably, as shown in fig. 2, an electromagnet is arranged at the bottom of the handle 7 and/or the handle tail 9, and the sliding block 8 is provided with a permanent magnet 81. The slide block 8 is driven by the electromagnet to realize the automatic knocking of the slide block 8 so as to realize the one-hand operation.

In a preferable scheme, a first electromagnet YA1 is arranged at the bottom of the handle 7, a second electromagnet YA2 is arranged at the tail part 9 of the handle, and a permanent magnet 81 is arranged on the sliding block 8;

the winding directions of the coils of the first electromagnet YA1 and the second electromagnet YA2 are opposite, so that the magnetic poles of the first electromagnet YA1 and the second electromagnet YA2 after being electrified are opposite;

the first electromagnet YA1 and the second electromagnet YA2 are electrically connected with the switch reversing circuit. With the structure, the first electromagnet YA1 and the second electromagnet YA2 attract and repel the sliding block 8 with the permanent magnet 81 respectively through the reversing of the switch reversing circuit, so that the reciprocating motion of the sliding block 8 is realized, and the automatic continuous knocking effect is realized.

In a preferred scheme, a buffer pad 82 is arranged at one end of the sliding block 8 close to the handle 7. With this structure, only the knocking in the uncapped direction is realized, and the knocking at the other end is buffered by the cushion pad 82, and the cushion pad 82 adopts a sponge pad, a rubber pad, a felt pad or a combination thereof. Further preferably, the end of the slider 8 far away from the cushion pad 82 is provided with a silencing ring 83, the silencing ring 83 is of an annular rubber structure and is embedded into the end surface of the slider 8, the silencing ring 83 slightly protrudes out of the end surface of the slider 8, and the silencing ring 83 greatly reduces knocking noise on the premise of not offsetting knocking effect.

Taking the best scheme as an example, when the invention is used, the pipeline and the line connection are checked firstly, and whether the actions of the air bag 13 and the sliding block 8 are reliable or not is tested. The wedge-shaped ring 5 is withdrawn to open the movable claw 1 and extend into the oral cavity of a patient, the dental crown 11 is clamped, the wedge-shaped ring 5 is pushed upwards towards the clamping part and is locked by the limiting nut 6, the wedge-shaped ring 5 pushes the limiting arm 4 to close the movable claw 1, and further preferably, silicon rubber for increasing friction force is arranged on the inner side of the movable claw 1 and/or the inner side of the fixed claw 2. At the moment, the sliding block 8 is manually pushed to knock the tail part 9 of the handle to realize crown removal, if the clamping part is separated from the dental crown 11 in the crown removal process, after the clamping part is fixed again, a button arranged on the handle or the inflating equipment is pressed, the air bag 13 is inflated through the inflating tube 10 and the air duct 14, the air bag 13 is expanded, and the dental crown 11 is fully coated. The crown removing operation is realized through the above mode. Further, if the operation is inconvenient, as shown in fig. 4, the start switch K5 on the handle, the main chip, preferably a chip of the STM32F series in this example, is pressed to output a control signal to sequentially control the on/off of the switches K1 and K3 and the switches K2 and K4, so that the first electromagnet YA1 and the second electromagnet YA2 with opposite magnetic poles continuously switch the magnetic poles to drive the slider 8 with the permanent magnet 81 to repeatedly knock the handle tail 9. The control switches k1, k3 and k2, k4 adopt a triode switch circuit or a thyristor switch circuit.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

Claims

1. A crown remover, characterized in that: it comprises a clamping part and a handle (7), and the handle is provided with a sliding block (8) device that generates an impact force;

The clamping part is a claw structure for clamping the tooth crown (11), and is provided with a rotatable movable claw (1), and a fixed claw (2) is arranged at the opposite position of the movable claw (1), which is fixed. The claw (2) is fixedly connected with the handle (7);

There is also a locking mechanism for locking the rotation angle of the movable claw (1);

The movable claw (1) is rotatably connected with the handle (7) through the pin shaft (3), and a limit arm (4) is provided on the side of the movable claw (1) facing the handle (7). ) is provided with a wedge-shaped ring (5) that moves along the handle (7) and is used to withstand the limit arm (4);

The wedge ring (5) is threadedly connected with the handle (7);

Or the wedge-shaped ring (5) is slidably connected with the handle (7), and a limit nut (6) is provided at the end of the wedge-shaped ring (5) away from the movable claw (1), and the limit nut (6) is threadedly connected with the handle (7);

An airbag (13) is provided on the inner side of the claw structure in contact with the tooth crown (11), and the airbag (13) is connected with the inflation tube (10) through the air tube (14); by filling the airbag (13) with a high-pressure medium, deforming the airbag (13) to wrap the tooth crown (11);

The side of the airbag (13) facing the dental crown (11) is provided with a barb tooth structure;

The bottom of the handle (7) is connected with the handle tail (9) through the sliding rod (15), and the sliding block (8) is slidably installed on the sliding rod (15);

An electromagnet is provided at the bottom of the handle (7) and/or the handle tail (9), and the slider (8) is provided with a permanent magnet (81);

The bottom of the handle (7) is provided with a first electromagnet (YA1), the handle tail (9) is provided with a second electromagnet (YA2), and the slider (8) is provided with a permanent magnet (81);

The winding directions of the coils of the first electromagnet (YA1) and the second electromagnet (YA2) are reversed so that the magnetic poles of the first electromagnet (YA1) and the second electromagnet (YA2) after electrification are opposite;

The first electromagnet (YA1) and the second electromagnet (YA2) are electrically connected with the switch reversing circuit;

In the slider (8), a buffer pad (82) is provided at one end close to the handle (7).