Bilateral retention crown taking device

Abstract

The utility model discloses a bilateral retention crown taking device which comprises a rod body and crown taking hooks, the crown taking hooks comprise a left crown taking hook and a right crown taking hook, the top end of the right crown taking hook is hinged to the left crown taking hook and is close to the top end of the left crown taking hook, and the hook ends of the bottoms of the left crown taking hook and the right crown taking hook face inwards and correspond to each other. And a spring is arranged between the left crown taking hook and the right crown taking hook and close to the upper part. The left crown taking hook and the right crown taking hook are adopted, and the spring is arranged between the left crown taking hook and the right crown taking hook, so that when the bilateral retention crown taking device is used for taking a crown, the hook ends at the bottoms of the left crown taking hook and the right crown taking hook are respectively placed at the junction parts of the two sides of the dental crown and gingiva to hook the dental crown, and the dental crown is synchronously pulled from the two sides of the dental crown; the tooth crown is prevented from deviating in the process of pulling the tooth crown, so that the tooth crown is separated more easily, the crown taking time is shortened, and the crown taking difficulty is also reduced.

Description

Technical Field

[0001] The utility model relates to a medical device for oral use, in particular to a bilateral retention crown remover. Background Art

[0002] A crown remover is often used to remove the dental crown. According to the specific situation of the dental crown, different crown remover accessories are adopted. If an aperture sleeve crown remover is used, the aperture sleeve crown remover is placed at the junction of the dental crown and the gum, and the dental crown is pulled down; if a traction hook type crown remover is used, the hook end of the traction hook can be placed at the junction of the dental crown and the gum to pull down the dental crown. When necessary, small holes and slits can be ground at the bottom of the dental crown, and then the crown remover is used for traction. For a dental crown with relatively firm adhesion or difficult to pull down, a dental drill can be used to split the dental crown into two halves, and instruments such as a dental elevator can be used to remove the dental crown in pieces.

[0003] However, the most commonly used one is the traction hook type crown remover. The traction hook type crown remover includes a rod body, a crown removal hook and a sliding sleeve. There is one crown removal hook. The bottom end of the rod body is connected to the top end of the crown removal hook. The sliding sleeve is sleeved on the rod body and is in sliding fit with the rod body. A limiting convex column is arranged at the top of the rod body, and the sliding sleeve can only slide between the crown removal hook and the limiting convex column. When using the traction hook type crown remover to remove the crown, the hook end of the traction hook is placed at the junction of the dental crown and the gum to hook the dental crown, and then the sliding sleeve is slid. The sliding sleeve moves towards the limiting convex column and impacts the limiting convex column, and the dental crown is pulled outwards by relying on the impact force, and then the dental crown is pulled out. During specific operation, when the dental crown is pulled outwards from one side of the dental crown, the dental crown will tilt to the other side, and the bottom of the tilted side of the dental crown will be more firmly stuck at the junction of the dental crown and the gum, making it difficult for the dental crown to break away. It is necessary to slide the sliding sleeve to impact the limiting convex column multiple times, so multiple tractions are required, and even traction operation needs to be carried out again on the other side of the dental crown, which not only increases the time for removing the crown, but also increases the difficulty of removing the crown. Summary of the Utility Model

[0004] Aiming at the above deficiencies existing in the prior art, the utility model provides a bilateral retention crown remover that is more conducive to removing the dental crown.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The bilateral retention crown remover includes a rod body and a crown removal hook. The crown removal hook includes a left crown removal hook and a right crown removal hook. The top end of the right crown removal hook is hinged on the left crown removal hook and is close to the top end of the left crown removal hook. The hook ends at the bottoms of the left crown removal hook and the right crown removal hook both face inwards and correspond to each other. A spring is arranged between the left crown removal hook and the right crown removal hook and is close to the upper part.

[0007] As a preferred scheme of the utility model, a groove is arranged on the right side of the left crown removal hook close to the top end, and the top end of the right crown removal hook is inserted into the groove of the left crown removal hook.

[0008] As a preferred embodiment of the present utility model, a shaft pin is arranged in the groove of the left crown extraction hook, and the top end of the right crown extraction hook is sleeved on the shaft pin and is rotationally matched with the shaft pin.

[0009] As a preferred embodiment of the present utility model, clamping grooves are respectively arranged on the opposite sides between the left crown extraction hook and the right crown extraction hook. One end of the spring is arranged in the clamping groove on the left crown extraction hook, and the other end of the spring is arranged in the clamping groove on the right crown extraction hook.

[0010] As a preferred embodiment of the present utility model, external threads are arranged on the outer wall of the left crown extraction hook near the top end, and external threads are arranged on the outer wall of the right crown extraction hook near the top end. A threaded sleeve is sleeved on the left crown extraction hook near the top end, and the threaded sleeve is in threaded fit with the external threads on the left crown extraction hook and the right crown extraction hook.

[0011] As a preferred embodiment of the present utility model, the crown extraction hook further includes a connecting column. The bottom end of the connecting column is integrally connected with the top end of the left crown extraction hook, and the bottom end of the rod body is detachably connected with the top end of the connecting column.

[0012] As a preferred embodiment of the present utility model, a sliding sleeve is sleeved on the rod body.

[0013] The technical effect of the present utility model is as follows: The present utility model adopts a left crown extraction hook and a right crown extraction hook, and a spring is arranged between the left crown extraction hook and the right crown extraction hook. When using the bilateral retention crown extractor to extract the crown, the hook ends at the bottoms of the left crown extraction hook and the right crown extraction hook are respectively placed on both sides of the crown at the junction with the gingiva to hook the crown, and the crown is synchronously pulled from both sides of the crown, avoiding the crown from shifting during the process of pulling the crown, making it easier for the crown to be detached, and also reducing the number of times the sliding sleeve impacts the limit convex column, which not only reduces the time for crown extraction but also reduces the difficulty of crown extraction. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of a bilateral retention crown extractor;

[0015] Figure 2 is a structural schematic diagram of the crown extraction hook.

[0016] In the figure: 1 - rod body; 2 - crown extraction hook; 21 - left crown extraction hook; 22 - right crown extraction hook; 23 - spring; 24 - groove; 25 - shaft pin; 26 - clamping groove; 27 - threaded sleeve; 28 - connecting column; 3 - sliding sleeve; 4 - limit convex column. Detailed Embodiment

[0017] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0018] Such as Figure 1and Figure 2 As shown in Figure 2 , the bilateral retention crown remover includes a rod body 1, a crown removal hook 2 and a sliding sleeve 4. The crown removal hook 2 includes a left crown removal hook 21, a right crown removal hook 22 and a connecting column 28. A groove 24 is provided near the top on the right side of the left crown removal hook 21. A shaft pin 25 is provided in the groove 24 of the left crown removal hook 21. The top end of the right crown removal hook 22 is inserted into the groove 24 of the left crown removal hook 21 and sleeved on the shaft pin 25 and is rotationally matched with the shaft pin 25, so as to realize that the top end of the right crown removal hook 22 is hinged on the left crown removal hook 21 and is close to the top end of the left crown removal hook 21. The hook ends at the bottoms of the left crown removal hook 21 and the right crown removal hook 22 both face inwards and correspond to each other. The bottom end of the connecting column 28 is integrally connected to the top end of the left crown removal hook 21. In this embodiment, the connecting column 28 and the left crown removal hook 21 are integrally formed. A threaded hole is provided at the top of the connecting column 28. External threads are provided at the bottom of the rod body 1. The bottom of the rod body 1 is screwed into the threaded hole of the connecting column 28. The bottom end of the rod body 1 and the top end of the connecting column 28 are detachably connected by means of threaded cooperation. A sliding sleeve 3 is sleeved on the rod body 1. A limiting convex column 4 is integrally provided at the top end of the rod body 1. The sliding sleeve 3 slides on the rod body 1 between the limiting convex column 4 and the connecting column 28.

[0019] A spring 23 is provided between the left crown removal hook 21 and the right crown removal hook 22 and near the upper part. In this embodiment, clamping grooves 26 are respectively provided on the opposite sides between the left crown removal hook 21 and the right crown removal hook 22. One end of the spring 23 is arranged in the clamping groove 26 on the left crown removal hook 21, and the other end of the spring 23 is arranged in the clamping groove 26 on the right crown removal hook 22.

[0020] When using the bilateral retention crown remover to remove the crown, rotate the right crown removal hook 22, the spring 23 is stretched, and the hook ends at the bottoms of the left crown removal hook 21 and the right crown removal hook 22 are separated. Place the hook ends at the bottoms of the left crown removal hook 21 and the right crown removal hook 22 respectively at the intersection of the two sides of the crown and the gum and hook the crown. Then slide the sliding sleeve 3. The sliding sleeve 3 moves on the rod body 1 towards the limiting convex column 4 and impacts the limiting convex column 4. Relying on the impact force, the crown is pulled outwards, and the crown is synchronously pulled from both sides of the crown, so as to pull out the crown. This bilateral retention crown remover realizes synchronous pulling from both sides of the crown, avoids the crown from shifting during the process of pulling the crown, makes it easier for the crown to come off, and also reduces the number of times the sliding sleeve 3 slides and impacts the limiting convex column 4, which not only reduces the time for removing the crown but also reduces the difficulty of removing the crown.

[0021] Since a spring 23 is provided between the left crown hook 21 and the right crown hook 22, under the pulling force of the spring 23, during the process of pulling the dental crown, the left crown hook 21 and the right crown hook 22 generally do not separate from the junction between the two sides of the dental crown and the gingiva. In order to further prevent the left crown hook 21 and the right crown hook 22 from separating from the junction between the two sides of the dental crown and the gingiva during the process of pulling the dental crown, in this embodiment, a threaded sleeve 27 is sleeved on the left crown hook 21 near the top. An external thread is provided on the outer wall of the left crown hook 21 near the top, and an external thread is provided on the right outer wall of the right crown hook 22 near the top. The threaded sleeve 27 is in threaded fit with the external threads on the left crown hook 21 and the right crown hook 22. Before using the bilateral retention crown extractor to perform dental crown traction, the threaded sleeve 27 can be rotated upward to make the threaded sleeve 27 disengage from the top of the right crown hook 22 to avoid interfering with the rotation of the right crown hook 22. When the hook ends at the bottoms of the left crown hook 21 and the right crown hook 22 are respectively placed at the junction between the two sides of the dental crown and the gingiva and hook the dental crown, under the action of the spring 23, the hook ends at the bottoms of the left crown hook 21 and the right crown hook 22 clamp the junction between the two sides of the dental crown and the gingiva, and the threaded sleeve 27 is rotated downward. The threaded sleeve 27 is sleeved on the tops of the left crown hook 21 and the right crown hook 22 to prevent the right crown hook 22 from rotating relative to the left crown hook 21, thereby further preventing the left crown hook 21 and the right crown hook 22 from separating from the junction between the two sides of the dental crown and the gingiva during the process of pulling the dental crown.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A bilaterally-retained crown remover, comprising a rod body (1) and a crown remover hook (2), characterized in that: The crown hook (2) comprises a left crown hook (21) and a right crown hook (22), the top end of the right crown hook (22) is hinged on the left crown hook (21) and close to the top end of the left crown hook (21), the hook ends at the bottom of the left crown hook (21) and the right crown hook (22) are both inwardly facing and corresponding, and a spring (23) is provided between the left crown hook (21) and the right crown hook (22) and close to the upper part; An external thread is provided on the outer wall of the left crown hook (21) near the top, and an external thread is provided on the outer wall of the right crown hook (22) near the top. A threaded sleeve (27) is sleeved on the left crown hook (21) near the top, and the threaded sleeve (27) cooperates with the external threads on the left crown hook (21) and the right crown hook (22).

2. The bilaterally-retaining crown remover according to claim 1, characterized in that: A groove (24) is provided on the right side of the left crown-removing hook (21) near the top end, and the top end of the right crown-removing hook (22) is inserted into the groove (24) of the left crown-removing hook (21).

3. The bilaterally-retained crown remover according to claim 2, characterized in that: An axle pin (25) is arranged in the groove (24) of the left crown-removing hook (21), and the top end of the right crown-removing hook (22) is sleeved on the axle pin (25) and rotatably cooperates with the axle pin (25).

4. The bilaterally-retained crown remover according to claim 1, characterized in that: A clamping groove (26) is respectively provided on one side opposite to the left crown-removing hook (21) and the right crown-removing hook (22); one end of the spring (23) is arranged in the clamping groove (26) on the left crown-removing hook (21), and the other end of the spring (23) is arranged in the clamping groove (26) on the right crown-removing hook (22).

5. The bilaterally-retaining crown remover according to claim 1, characterized in that: The crown-removing hook (2) further comprises a connecting column (28), the bottom end of the connecting column (28) being integrally connected to the top end of the left crown-removing hook (21), and the bottom end of the rod body (1) being detachably connected to the top end of the connecting column (28).

6. The bilaterally-retaining crown remover according to claim 1, characterized in that: The rod body (1) is sleeved with a sliding sleeve (3).

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