Dental abutments

Abstract

To provide a dental abutment that has good aesthetics, is compatible with the gingival mucosa, and promotes the proliferation of fibroblasts. [Solution] An implant abutment (1) having a support portion (4) that contacts the inside of a prosthesis and fixes the prosthesis, wherein at least a portion of the surface of the support portion is pink gold in color or has an oxide coating layer.

Description

[Technical Field]

[0001] The present invention relates to an abutment used in a dental implant, and more particularly to an easily removable dental abutment. [Background technology]

[0002] Japanese Patent Publication No. 6245400 describes an abutment for an implant. In dental implant treatment, the abutment plays an important role in connecting the implant body, which is inserted into the patient's jawbone, to the superstructure. A typical abutment uses a fixation screw, and a structure is required to securely accommodate this screw and obtain appropriate fixation force. For this reason, the dental implant fixture and abutment are often firmly connected by a tapered fit. The abutment may need to be removed during implant maintenance. However, as mentioned above, the implant and abutment are firmly connected, making removal difficult. Furthermore, forcibly removing the abutment can have adverse effects on the soft tissue and bone tissue surrounding the implant.

[0003] Furthermore, when the metal surface is exposed, there are problems such as poor aesthetics, poor compatibility with the gingival mucosa, and undesirable proliferation of fibroblasts. [Prior art documents] [Patent documents]

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

[0005] Therefore, an object of the present invention is to provide a dental abutment that is aesthetically pleasing, compatible with the gingival mucosa, and promotes the proliferation of fibroblasts. [Means for solving the problem]

[0006] This invention is based on the finding that the above-mentioned problems can be solved by a dental abutment having at least a part of its surface colored in pink gold or having an oxide coating layer formed thereon.

[0007] The invention relates to a dental abutment 1. This dental abutment 1 is an implant abutment having a base portion 4 that contacts the inside of a prosthesis and fixes the prosthesis, and at least a portion of the surface of the base portion 4 is pink gold colored or has an oxide coating layer. This example of a dental abutment 1 further includes a cuff portion 2 located closer to the implant than the abutment portion 4 and for supporting a prosthesis, and a fixture connection portion 6 located closer to the implant than the cuff portion 2 and for connecting the implant and the implant abutment. At least a portion of the surface of the cuff portion 2 and / or at least a portion of the surface of the fixture connection portion 6 is pink gold in color. The entire surface of the implant abutment may be pink gold in color. The implant abutment may be made of titanium. [Effects of the Invention]

[0008] At least a part of the surface is colored pink gold or an oxide coating layer is formed, so that a dental abutment can be provided that is aesthetic, has good compatibility with the gingival mucosa, and promotes the proliferation of fibroblasts. [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 within 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 a male thread portion 35 shaped to correspond to the female thread portion 5 (or the female 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 that are preferable include white resins and resins that match the color of the prosthesis. Resins used in dentistry may be appropriately adopted. A specific example of a resin is polyacetal resin. The access hole sealing rod 31 includes a body portion 33 shaped to fit into the access hole and a male thread 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 housing 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. An implant abutment having an abutment portion (4) for contacting the inside of a prosthesis and fixing the prosthesis, At least a part of the surface of the abutment (4) is pink gold in color.

2. 2. The implant abutment according to claim 1, a cuff portion (2) positioned closer to the implant than the abutment portion (4) and for supporting the prosthesis; The implant abutment further includes a fixture connection portion (6) located closer to the implant than the cuff portion (2), for connecting the implant and the implant abutment, The implant abutment, wherein at least one of or both of a surface of the cuff portion (2) and a surface of the fixture connection portion (6) is pink gold in color.

3. 3. The implant abutment according to claim 2, wherein the entire surface of the implant abutment is pink gold in color.

4. The implant abutment according to any one of claims 1 to 3, Titanium implant abutment.

5. An implant abutment having an abutment portion (4) for contacting the inside of a prosthesis and fixing the prosthesis, The implant abutment, wherein at least a part of the surface of the abutment portion (4) has an oxide coating layer.

6. 6. The implant abutment according to claim 5, a cuff portion (2) positioned closer to the implant than the abutment portion (4) and for supporting the prosthesis; The implant abutment further includes a fixture connection portion (6) located closer to the implant than the cuff portion (2), for connecting the implant and the implant abutment, The implant abutment, wherein at least a portion of the surface of the cuff portion (2) and / or at least a portion of the surface of the fixture connection portion (6) has an oxide coating layer.

7. 7. The implant abutment according to claim 6, wherein the entire surface of the implant abutment has an oxide coating layer.

8. 8. The implant abutment according to claim 7, The implant abutment, wherein the oxide coating layer is pink gold in color.

9. The implant abutment according to any one of claims 5 to 8, Titanium implant abutment.

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