Abutment Remover

Abstract

To provide a device that allows easy removal of an abutment. [Solution] The present invention relates to an abutment remover 21 for removing a dental abutment 1. The abutment remover 21 has a body 23 and a male threaded portion 25 provided midway through the body 23. The dental abutment 1 has an access hole with a female threaded portion 5. At least a portion of the body 23 of the abutment remover 21 is the portion that is inserted into the access hole. The male threaded portion 25 provided on the body 23 of the abutment remover 21 has a shape that corresponds to the female threaded portion 5 of the dental abutment 1.

Description

[Technical Field]

[0001] The present invention relates to an abutment remover for removing abutments used in dental implants. [Background technology]

[0002] An abutment for an implant is described in Japanese Patent No. 6245400. In dental implant treatment, the abutment plays an important role in connecting the implant body embedded in the patient's jawbone to the superstructure.

[0003] For example, after an abutment is placed on a dental model, it may need to be removed. A device that allows for easy removal without damaging the abutment is desirable. Also, after an abutment is placed in a patient's oral cavity, it may need to be removed. A device that allows for smooth removal of the abutment without placing a burden on the patient is desirable. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6245400 Summary of the Invention [Problem to be solved by the invention]

[0005] The invention aims to provide a device that allows for easy removal of the abutment. [Means for solving the problem]

[0006] This invention is based on the finding that the above problems can be solved by an abutment remover having a body portion with a thread shape that corresponds to the internal thread formed in the access hole of the dental abutment.

[0007] This invention relates to an abutment remover 21 for removing a dental abutment 1. This abutment remover 21 has a body portion 23 and a male thread portion 25 provided midway on the body portion 23. The dental abutment 1 has an access hole with a female thread portion 5 . At least a part of the body 23 of the abutment remover 21 is the part that is inserted into the access hole. The male thread portion 25 provided on the body 23 of the abutment remover 21 has a shape that corresponds to the female thread portion 5 of the dental abutment 1 (for example, a shape in which the threads screw together). Preferably, the body portion 23 further includes a head portion 27 provided coaxially with the body portion 23 at the end opposite to the portion that is initially inserted into the dental abutment 1. For example, the abutment remover 21 is used to remove the dental abutment 1 by rotating the head portion 27 with the male thread portion 25 threadedly engaged with the female thread portion 5. The head portion 27 preferably includes a fitting portion 28 for fitting with a rotating tool such as a screwdriver. In this case, the head portion 27 is used to remove the dental abutment 1 by threading the male thread portion 25 with the female thread portion 5 and rotating the rotating tool with the fitting portion 28 engaged. The body portion 23 preferably includes a length adjustment portion 30 for adjusting the length of the body portion 23. [Effects of the Invention]

[0008] This invention provides a device that allows for easy removal of the abutment. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a conceptual diagram for explaining a dental abutment. [Figure 2] FIG. 2 is a diagram illustrating an example of a screw head. [Figure 3] FIG. 3 is a conceptual diagram showing how an abutment is removed by an abutment remover. [Figure 4] Figure 4 is a conceptual diagram showing the insertion of an access hole sealing rod into the hollow portion inside the abutment. Figure 4(a) is a conceptual diagram for explaining the access hole sealing rod. Figure 4(b) is a conceptual diagram (cross-sectional view) showing the state in which the access hole sealing rod and abutment are joined. Figure 4(c) is a conceptual diagram showing the state in which the access hole sealing rod is inserted into the abutment through a hole provided in the prosthesis. Figure 4(d) is a conceptual diagram after the shape of the access hole sealing rod has been adjusted. [Figure 5] Figure 5 is a conceptual diagram showing an example of an abutment in which the female thread portion is provided around the screw head housing portion. Figure 5(a) shows an external view of the abutment. Figure 5(b) shows an example of a conceptual cross-sectional view of the abutment. Figure 5(c) shows the state in which an access hole sealing rod has been inserted into the abutment. [Figure 6] Figure 6 is a conceptual diagram showing the designed abutment, where Figure 6(a) is an external view and Figure 6(b) is a partial cross-sectional view. [Figure 7] Figure 7 is a conceptual diagram showing how a prosthesis is sealed using an access hole sealing rod. Figure 7(a) shows the access hole sealing rod being inserted into the abutment. Figure 7(b) shows the access hole sealing rod protruding from the prosthesis after being inserted into the abutment. Figure 7(c) shows the access hole sealing rod being cut and then reshaped. [Figure 8] Figure 8 is a photograph, in lieu of a drawing, showing how a dental model was produced using a 3D printer and an implant was formed using an abutment. [Figure 9] FIG. 9 is a photograph, in place of a drawing, showing a dental model after the implant has been formed. [Figure 10] FIG. 10 is a conceptual diagram showing an embodiment of an abutment remover. DETAILED DESCRIPTION OF THE INVENTION

[0010] FIG. 1 is a conceptual diagram illustrating a dental abutment. As shown in FIG. 1, the dental abutment 1 has, for example, a screw head receiving portion 3 and a female thread portion 5. In the example of FIG. 1, a relief groove portion 7 is present. In the example of FIG. 1, a hollow portion (access hole) is present that passes through the dental abutment 1 via the screw head receiving portion 3 and the female thread portion 5. This hollow portion functions as a passage that allows the screw to be easily inserted and removed. The dental abutment 1 has a hollow portion inside, and its exterior shape may be any known shape that is appropriate. Since the dental abutment 1 is typically used for dental purposes, its size and the like may be appropriately set taking into account the size of the tooth to which it is applied.

[0011] The dental abutment 1 is an element for connecting an implant (artificial tooth root) and a prosthesis (crown, bridge, denture, etc.). There are the following types of abutments, for example: screw-retained type (abutment that fixes the prosthesis with a screw), cement-retained type (abutment that bonds the prosthesis with cement, etc.), and custom abutment (abutment that is individually designed when a special shape is required). The abutment is made of, for example, titanium or zirconia. Abutments are already known, so elements of known abutments may be adopted as appropriate.

[0012] As shown in FIG. 1 , the dental abutment 1 may have a cuff portion 2 for supporting a prosthesis. The dental abutment 1 may also have an abutment portion 4 for fixing the prosthesis from inside the prosthesis, and may further have a fixture connection portion 6 located closer to the implant than the cuff portion 2 for connecting the implant to the dental abutment. At least a portion of the surface of each of these elements is preferably pink gold in color. At least a portion of the surface of each of these elements is preferably formed with an oxide coating layer. The oxide coating layer can be formed, for example, by anodizing a metal surface. The entire surface of each of these elements may have an oxide coating layer or may be pink gold in color. The outer surface of each of these elements may have an oxide coating layer or may be pink gold in color. Pink gold refers to an alloy made by mixing gold with metals such as copper and silver. The pink gold color may be any color that is characteristic of pink gold or that is visually recognizable as pink gold.

[0013] FIG. 2 is a diagram illustrating an example of a screw head. The screw head 11 of a dental implant is typically located at the top of the implant (artificial tooth root). The screw head 11 is typically designed with a cylindrical or tapered shape and serves to stabilize the connection between the implant body and the prosthesis (artificial tooth). Examples of materials for the screw head 11 include highly biocompatible materials such as titanium and zirconia. The screw head 11 shown in FIG. 2 includes a cylindrical body portion 13, a cylindrical head portion 15 located above the body portion 13 and having a larger diameter than the body portion 13, a threaded portion 17 located below the body portion 13, and a tip portion 19 located below the threaded portion 17. In this specification, a larger diameter may refer to a diameter that is, for example, 0.1 mm to 5 mm larger, 0.2 mm to 4 mm larger, 0.5 mm to 4 mm larger, or 1 mm to 3 mm larger.

[0014] The screw head receiving portion 3 in Fig. 1 has a shape suitable for receiving the screw head 11. The screw head receiving portion 3 has a body receiving portion, which is a portion for receiving the body portion 13 of the screw head 11 (a portion having a hole with a diameter equal to or slightly larger than the diameter of the body portion 13 and smaller than the diameter of the head portion 15), and a head receiving portion, which is located above the body receiving portion and is a portion for receiving the head portion 15 (a portion having a hole with a diameter equal to or slightly larger than the diameter of the head portion 15). Because of this shape, when the screw head 11 is inserted into the screw head receiving portion 3, it stops at an appropriate position.

[0015] The female thread portion 5 is an element provided around or on top of the screw head receiving portion 3 and has a root diameter larger than the diameter of the screw head 11. In the example of FIG. 1, the female thread portion 5 is provided on the top of the screw head receiving portion 3. That is, the internal hollow portion of the female thread portion 5 forms a female thread. The root diameter is larger than the internal diameter of the screw head receiving portion 3 (the diameter of the head receiving portion). This shape makes it easy to insert the screw head 11 through the female thread portion 5. The presence of the female thread portion 5 also makes it easy to adjust or remove the dental abutment 1 by inserting a remover or adjustment rod into this portion. Furthermore, the presence of the female thread portion 5 can also be used for sealing after the attachment of a superstructure. The implant body (artificial tooth root) and the abutment or the screw head are threaded together to precisely fix them. In this specification, the root diameter being larger than the internal diameter of the screw head receiving portion 3 (the diameter of the head receiving portion) may be equal to the diameter of the screw head receiving portion, or may be larger by 0.1 mm or more and 5 mm or less. As described above, the diameter may be in a range that does not affect the accommodation of the screw head.

[0016] The relief groove 7 is an element present in the upper part of the female thread portion and has an internal hole with a diameter larger than the root diameter of the female thread portion. The relief groove 7 may have a female thread formed therein, which allows the screw head 11 to be inserted and removed more smoothly, improving work efficiency.

[0017] FIG. 3 is a conceptual diagram showing how an abutment is removed with an abutment remover. The abutment remover 21 is used to remove a dental abutment 1. The abutment remover 21 includes a body portion 23 and a male thread portion 25 provided on the body portion 23. The male thread portion 25 has a thread shape that corresponds to the female thread portion 5. In the example of FIG. 3, the abutment remover 21 has a head portion 27 on its upper portion. As shown in FIG. 3( a), when removing an abutment 1 with the abutment remover 21, the abutment remover 21 is inserted into the abutment 1 from top to bottom. After the male thread portion 25 of the abutment remover 21 reaches the female thread portion 5 (the female thread inside the female thread) of the abutment 1, the abutment remover 21 can be coupled (screwed together) with the abutment 1 by rotating the abutment remover 21. 3(b) is a conceptual diagram showing the abutment remover and abutment coupled together. In this state, by rotating the abutment remover 21, the female thread of the abutment screws into the male thread of the abutment remover. Then, by lifting the abutment remover 21, the abutment 1 can be removed.

[0018] FIG. 10 is a conceptual diagram showing an embodiment of an abutment remover. The abutment remover 21 is a tool for removing a dental abutment 1. The abutment remover 21 has a body portion 23 and a male thread portion 25 provided midway through the body portion 23. The body portion 23 is, for example, rod-shaped or cylindrical. The dental abutment 1 has, for example, an access hole with a female thread portion 5. At least a portion of the body portion 23 of the abutment remover 21 is the portion that is inserted into the access hole. The male thread portion 25 of the abutment remover 21 has a shape that corresponds to the female thread portion 5 (internal thread portion) of the dental abutment 1. In the example of FIG. 10, the abutment remover 21 further has a head portion 27 provided coaxially with the body portion 23 at the end of the body portion 23 opposite the portion that is inserted into the dental abutment 1 (the upper end portion in FIG. 10). The head portion 27 preferably has a larger diameter than the body portion 23 located below the head portion 27. Even if the head portion 27 has the same diameter as the body portion 23, it is preferable that the head portion 27 has a fitting portion 28 formed, for example, by a recess at its end. The head portion 27 is used, for example, to remove the dental abutment 1 by rotating the head portion 27 (or the body portion 23) while the male thread portion 25 is threadedly engaged with the female thread portion 5. The fitting portion 28 may be, for example, a recess that accommodates a rotating element of a rotating tool. An example of a rotating tool is a screwdriver (a manual screwdriver or an electric screwdriver). The body portion 23 of the abutment remover 21 preferably has a length adjustment portion 30 for adjusting the length of the body portion 23. The length adjustment portion 30 in FIG. 10 has multiple notches circumferentially around the body portion 23, and the length of the body portion 23 can be adjusted by cutting the body portion 23 using the notches at the desired location. An abutment remover 21 is inserted into the access hole of the dental abutment 1, and the abutment remover 21 is rotated (for example, clockwise) so that the male thread portion 23 of the remover corresponds to the female thread portion 5 of the dental abutment 1. The abutment remover 21 is tightened until the tip of the abutment remover 21 touches the bottom surface of the fixture. The dental abutment 1 is then removed from the fixture by being pushed out vertically.

[0019] FIG. 4 is a conceptual diagram showing the insertion of an access hole sealing rod into the hollow portion inside the abutment. The access hole sealing rod 31 is used, for example, to seal the dental abutment 1. The access hole sealing rod 31 has an externally threaded portion 35 shaped to correspond to the internal threaded portion 5 (or the internal thread of the undercut portion 7). By passing the access hole sealing rod 31 through the hollow portion (access hole) inside the abutment 1, it is expected to prevent the inflow of resin, wax, cement, etc. during wax-up, cementation, and verification index fabrication. The access hole sealing rod 31 may be made of a resin used in dentistry. Examples of resins include white resins and resins that match the color of the prosthesis. Resins used in dentistry may be used as appropriate. Specific examples of resins include silicone resin and polyacetal resin. The access hole sealing rod 31 includes a body portion 33 shaped to fit into the access hole and an externally threaded portion 35 provided on the body portion 33. The male thread portion 35 has a thread shape corresponding to the female thread portion 5. In the example of Figure 4(a), a tip portion 37 is formed at the bottom of the male thread portion 35. The access hole sealing rod can also be used as a protective member when bonding the prosthesis and the abutment.

[0020] When using the access hole sealing rod 31, the access hole sealing rod 31 is inserted into the abutment 1 from top to bottom. After the male thread portion 35 of the access hole sealing rod 31 reaches the female thread portion 5 (internal female thread) of the abutment 1, the access hole sealing rod 31 can be coupled (screwed) to the abutment 1 by rotating the access hole sealing rod 31. Figure 4(b) is a conceptual diagram (cross-sectional view) showing the state in which the access hole sealing rod 31 and the abutment are coupled. Figure 4(c) is a conceptual diagram showing the state in which the access hole sealing rod is inserted into the abutment through a hole in the prosthesis. Figure 4(d) is a conceptual diagram after the shape of the access hole sealing rod has been adjusted. In this example, the prosthesis was bonded to the abutment 1 in the oral cavity, and then the access hole sealing rod 31 was set, and the access hole sealing rod 31 was cut to the appropriate length and shaped. In this manner, an implant can be formed using this abutment 1. In this way, it is preferable that the body portion 33 of the access hole sealing rod 31 can be adjusted in shape by cutting. The access hole sealing rod 31 can also be used to seal screw holes in the oral cavity. The access hole sealing rod 31 can also be used to seal holes in prosthetic appliances, etc.

[0021] FIG. 5 is a conceptual diagram showing an example of an abutment in which a female thread portion is provided around a screw head receiving portion. FIG. 5(a) shows an external view of the abutment. FIG. 5(b) shows an example of a cross-sectional conceptual diagram of the abutment. FIG. 5(c) shows the state in which an access hole sealing rod is inserted into the abutment. In this example, the female thread portion 5 is provided around the screw head receiving portion 3. As in this example, only a portion of the screw head 11 may be received in the screw head receiving portion 3. In the example shown in FIG. 5, the central axis of the internal cavity of the female thread portion 5 and the central axis of the internal cavity of the screw head receiving portion 3 are the same or nearly the same. In the example of FIG. 5, the female thread portion 5 is formed so as to surround the portion in which part of the screw head 11 is received. In addition, in this example, the access hole sealing rod 31 is threadedly engaged with the relief groove portion 7. [Example]

[0022] Figure 6 is a conceptual diagram showing the designed abutment. Figure 6(a) is an external view, and Figure 6(b) is a partial cross-sectional view. This dental abutment 1 has a screw head accommodating portion 3, a female thread portion 5, and an undercut portion 7. This abutment is a mechanism for separating the abutment from an implant fixture that is firmly fitted using a tapered joint. This abutment also serves as a hole sealing mechanism for creating a screw-retained superstructure. This abutment has an internal thread on its inner surface. This thread is thicker than the screw head and is large enough not to affect removal. A remover can be inserted here to remove the abutment from the fixture. This abutment can also be used for sealing after the superstructure is attached.

[0023] Figure 7 is a conceptual diagram showing how a prosthesis is sealed using an access hole sealing rod. Figure 7(a) shows the access hole sealing rod being inserted into the abutment. Figure 7(b) shows the access hole sealing rod protruding from the prosthesis after being inserted into the abutment. Figure 7(c) shows the access hole sealing rod being cut and then reshaped.

[0024] Figure 8 is a photograph, instead of a drawing, showing a dental model produced with a 3D printer and an implant formed using an abutment. Figure 9 is a photograph, instead of a drawing, showing the dental model after the implant has been formed. In this way, it has been demonstrated that the use of the dental abutment of this invention makes it easier to form implants and remove the abutment. [Industrial Applicability]

[0025] The dental abutment of the present invention can be widely used in dental implant treatment, and contributes to improving the efficiency and success rate of implant treatment. [Explanation of symbols]

[0026] 1 Dental abutment 2 Cuff 3 Screw head holder 4 Abutment 5 Female thread 6 Fixture connection 7 Undercut groove 11 Screw head 13 Torso 15 Head 17 Threaded section 19 Tip 21 Abutment Remover 23 Torso 25 Male thread 27 Head 31 Access hole blocking rod 33 Torso 35 Male thread 37 Tip

Claims

1. A body portion (23); and a male thread portion (25) provided midway through the body portion (23), An abutment remover (21) for removing a dental abutment (1), comprising: The dental abutment (1) has an access hole with an internal thread portion (5), At least a part of the body portion (23) is inserted into the access hole, The male thread portion (25) has a shape corresponding to the female thread portion (5). Abutment remover (21).

2. 2. An abutment remover (21) according to claim 1, The body portion (23) further includes a head portion (27) provided coaxially with the body portion (23) at an end opposite to the portion inserted into the dental abutment (1). Abutment remover (21).

3. 3. An abutment remover (21) according to claim 2, An abutment remover (21) used to remove the dental abutment (1) by rotating the head portion (27) while the male threaded portion (25) is threadedly engaged with the female threaded portion (5).

4. 3. An abutment remover (21) according to claim 2, The head portion (27) has a fitting portion (28) for fitting with a rotating tool. Abutment remover (21).

5. 4. An abutment remover (21) according to claim 3, An abutment remover (21) used to remove the dental abutment (1) by screwing the male threaded portion (25) into the female threaded portion (5) and engaging the rotating tool with the engaging portion (28), and then rotating the rotating tool.

6. An abutment remover (21) according to any one of claims 1 to 5, The body portion (23) has a length adjustment portion (30) for adjusting the length of the body portion (23). Abutment remover (21).

Images