A reverse de-crowner

Abstract

The utility model provides a reverse crown removing device belongs to dental tool technical field, including force bar, connecting rod and crown head, and the crown head includes inclined rod and crown removing rod, connecting rod and force bar fixed connection, both ends of inclined rod are fixed connection with connecting rod and crown removing rod respectively, and the top outside of crown removing rod has curved surface, and the top inside of crown removing rod has abutting surface, the utility model can quickly take off the dental crown, and will not scratch the patient's lip or mucous membrane, will not damage the dental crown, convenient and fast operation.

Description

Technical Field

[0001] This utility model belongs to the field of dental tool technology, and specifically relates to a reverse crown remover. Background Technology

[0002] During the restoration of missing teeth or the restoration of crowns after root canal treatment, various factors may necessitate the complete removal of the crown in preparation for its reinsertion. Currently, in clinical practice, traditional crown removers or ultrasonic crown removers are typically used to remove the crown in such cases. If the crown cannot be removed, the only option is to break it open and remake it.

[0003] Traditional crown removal methods involve using hooks at the working end of the crown to hook onto the connection between the crown and the tooth structure or the permanent abutment of the implant restoration. The crown is then removed by manually pulling the other end of the crown removal device, causing vibration. However, due to the small gap at the connection between the restoration or implant abutment and the crown, traditional crown removal devices often fail to hook the crown properly and are prone to dislodging, even potentially causing scratches to the patient's lips or mucosa. Ultrasonic crown removal devices, which add a motor to the traditional method, replace manual pulling with electric pulling, offering higher frequency and greater force. However, the problem of dislodging still persists. For bridge restorations, ultrasonic crown removal devices are also equipped with a traction rope head to remove the crown using traction force. However, this also presents several challenges. Some patients have limited mouth opening, restricting the operating space, and the process is cumbersome and inefficient. In other patients, the bridge is tightly fitted to the mucosa, preventing the traction rope from passing through and thus rendering the device ineffective. Therefore, there is an urgent need for a convenient and easy-to-use crown removal device to help clinicians quickly resolve crown removal issues. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of traditional crown removers failing to hook onto the crown in the dental groove and easily detaching, even potentially scratching the patient's lips or mucous membranes. This invention provides a reverse crown remover. This invention can quickly remove the crown without scratching the patient's lips or mucous membranes or damaging the crown.

[0005] A reverse crown remover includes a force transmission rod, a connecting rod, and a crown removal head. The crown removal head includes a slant rod and a crown removal rod. The connecting rod is fixedly connected to the force transmission rod. The two ends of the slant rod are fixedly connected to the connecting rod and the crown removal rod, respectively. The outer top of the crown removal rod has a curved surface, and the inner top of the crown removal rod has a top abutting surface.

[0006] The crown removal head consists of two parts, which are distributed in parallel.

[0007] The crown removal head consists of 3 pieces, which are evenly spaced and parallel.

[0008] The crown removal rod has a rubber sleeve fitted at the top. The purpose of the rubber sleeve is to increase the friction with the crown and prevent damage to the crown.

[0009] The force transmission rod and the connecting rod are connected by a screw hole and a screw, so that one force transmission rod can be matched with multiple crown removal heads.

[0010] The transmission rod, connecting rod, and crown removal head are made of medical-grade stainless steel.

[0011] The aforementioned sleeve is a silicone sleeve.

[0012] The working process of this utility model: When the inlaid crown needs to be removed, align the curved surface of the crown removal bar of the reverse crown removal tool with the outer surface of the tooth, and place the top of the crown removal bar against the lower side of the crown. Use a hammer or other object to strike the bottom of the force transmission bar, so that the crown removal bar applies upward force and removes the crown from the tooth.

[0013] When the crowns are two connected pieces, use a double crown removal head to remove them simultaneously without damaging them. When the roots of the two crowns are not aligned, adjust the number of sleeves to allow the abutting surfaces of the two crown removal rods to simultaneously abut the roots of both crowns.

[0014] When the crown consists of three connected pieces, use three crown removal heads to remove the crowns simultaneously without damaging them. When the roots of the three crowns are not aligned, adjust the abutment surfaces of the three crown removal heads by increasing or decreasing the number of sleeves to simultaneously abut the roots of the three crowns.

[0015] Undamaged crowns removed can be reused.

[0016] The beneficial effects of this utility model are: This invention can quickly remove tooth crowns without scratching the patient's lips or mucous membranes or damaging the tooth crowns; the operation is convenient and quick. Attached Figure Description

[0017] Figure 1 This is a perspective view of the first embodiment of the present utility model; Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0018] Figure 3 This is a perspective view of the second embodiment of the present invention; Figure 4 This is a perspective view of the third embodiment of the present invention; Figure 5 This is a schematic diagram of the crown-removing rod sleeve with rubber sleeve according to this utility model; Figure 6 This is a schematic diagram of the threaded connection between the force transmission rod and the connecting rod of this utility model; Figure 7 This is a three-dimensional schematic diagram of the sleeve and the threaded connection between the force transmission rod and the connecting rod of this utility model. Figure 8 This is a three-dimensional schematic diagram of the hammer used in this utility model. Detailed Implementation

[0019] like Figure 1 and Figure 2 As shown, a reverse crown remover includes a force transmission rod 1, a connecting rod 2, and a crown removal head 3. The crown removal head 3 includes a slanted rod 32 and a crown removal rod 33. The connecting rod 2 is fixedly connected to the force transmission rod 1. The two ends of the slanted rod 32 are fixedly connected to the connecting rod 2 and the crown removal rod 33, respectively. The outer side of the top of the crown removal rod 33 has a curved surface 331, and the inner side of the top of the crown removal rod 33 has a top abutment surface 332.

[0020] like Figure 3 As shown, there are two crownless heads 3, which are distributed in parallel.

[0021] like Figure 4 As shown, there are three crownless heads 3, which are distributed in parallel at equal intervals.

[0022] like Figure 5 As shown, the crown removal bar 33 is fitted with a rubber sleeve 34 at its top. The function of the rubber sleeve 34 is to increase the friction with the crown and prevent damage to the crown.

[0023] like Figure 6 As shown, the force transmission rod 1 and the connecting rod 2 are connected by a screw hole 11 and a screw 21, so that one force transmission rod 1 can be matched with multiple crown removal heads 3.

[0024] like Figure 7 The diagram shown is a schematic diagram of a rubber sleeve 34, a force transmission rod 1 and a connecting rod 2 connected by threads.

[0025] The transmission rod 1, connecting rod 2, and crown removal head 3 are made of medical-grade stainless steel.

[0026] The aforementioned sleeve 34 is a silicone sleeve.

[0027] The working process of this embodiment: like Figures 1 to 8 As shown, when the inlaid crown needs to be removed, the curved surface 331 of the crown removal bar 33 of the reverse crown removal device is aligned with the outer surface of the tooth, and the abutting surface 332 of the top of the crown removal bar 23 abuts against the lower side of the crown. Figure 8 The hammer 4 or other object shown strikes the bottom of the force transmission rod 1, causing the crown removal rod 33 to exert upward force and remove the crown from the tooth.

[0028] When the crowns are two connected pieces, use double crown removal heads 3 to remove the crowns simultaneously without damaging them. When the roots of the two crowns are not aligned, adjust the abutment surfaces 332 of the two crown removal rods 33 by increasing or decreasing the number of sleeves 34 to simultaneously abut the roots of the two crowns.

[0029] When the crown consists of three connected pieces, the crowns are removed simultaneously using three crown removal heads 3, thus avoiding damage to the crowns. When the roots of the three crowns are not aligned, the abutting surfaces 332 of the three crown removal rods 33 are adjusted by increasing or decreasing the number of sleeves 34, so that they simultaneously abut the roots of the three crowns.

[0030] Undamaged crowns removed can be reused.

Claims

1. A reverse crown remover, characterized in that: It includes a force transmission rod (1), a connecting rod (2) and a crown removal head (3). The crown removal head (3) includes a diagonal rod (32) and a crown removal rod (33). The connecting rod (2) is fixedly connected to the force transmission rod (1). The two ends of the diagonal rod (32) are fixedly connected to the connecting rod (2) and the crown removal rod (33) respectively. The outer side of the top of the crown removal rod (33) has a curved surface (331), and the inner side of the top of the crown removal rod (33) has a top abutment surface (332).

2. The reverse crown remover according to claim 1, characterized in that: There are two crownless heads (3), and the two crownless heads (3) are distributed in parallel.

3. A reverse crown remover according to claim 1, characterized in that: The crown removal head (3) consists of 3 pieces, and the 3 crown removal heads (3) are distributed in parallel at equal intervals.

4. A reverse crown remover according to claim 1, 2, or 3, characterized in that: The crown removal rod (33) is fitted with a rubber sleeve (34) at the top.

5. A reverse crown remover according to claim 1, 2, or 3, characterized in that: The force transmission rod (1) and the connecting rod (2) are connected by a screw hole (11) and a screw (21).

6. A reverse crown remover according to claim 1, characterized in that: The transmission rod (1), connecting rod (2) and crown removal head (3) are made of medical stainless steel.

7. A reverse crown remover according to claim 4, characterized in that: The aforementioned sleeve (34) is a silicone sleeve.

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