Dental abutment assembly

Abstract

Provided is a dental abutment assembly. The dental abutment assembly is characterized by comprising: a base abutment coupled to a fixture; a link abutment coupled to the base abutment; and a crown screw that is fastened to the base abutment via the link abutment through a crown placed on the link abutment, thereby fixing the crown, wherein the link abutment is made of an elastic body and fastened to the base abutment through an undercut surface.

Description

Dental abutment assembly

[0001] The present invention relates to a dental abutment assembly, and more particularly, to a dental abutment assembly which is manufactured with an efficient structure different from the conventional one, so that a link abutment and a base abutment can be accurately fastened, thereby preventing a crown screw from breaking or loosening, and which not only prevents the occurrence of a mechanical gap between the link abutment and the base abutment, but also effectively prevents periodontitis from occurring due to excess cement because cement is not used.

[0002] In dentistry, a dental implant is defined as a series of procedures involving the transplantation of artificial teeth. In other words, a dental implant involves implanting a fixture (a tooth root) into the alveolar bone to replace a lost tooth root, then attaching an artificial tooth to it via an abutment, restoring the function of the original tooth.

[0003] In the case of general prosthetics or dentures, the surrounding teeth and bones deteriorate over time, but implants do not damage the surrounding tooth tissues, and have the same function and shape as natural teeth, but do not develop cavities, so they have the advantage of being able to be used semi-permanently.

[0004] Implants not only restore single missing teeth, but also enhance the function of dentures in partially and completely edentulous patients, improve the aesthetic aspect of dental prosthesis restoration, and further help to stabilize the teeth by dispersing excessive stress on the surrounding supporting bone tissue.

[0005] Let's take a brief look at the process of performing dental implants.

[0006] First, a hole is drilled for the fixture, and the fixture is then implanted into the alveolar bone. After a certain period of time, osseointegration of the fixture is complete. An abutment is then inserted into the fixture, secured with an abutment screw. This makes the fixture and abutment become one unit.

[0007] The implant procedure is then completed by placing the final prosthesis, a crown, or artificial tooth prosthesis, on the abutment and bonding it to it. If the gums need to be shaped to facilitate healing before the prosthesis is placed, a healing abutment can be pre-bonded to the fixture.

[0008] Meanwhile, while the above-mentioned surgical method is common, a method of separating the abutment and performing the procedure in an assembly form has recently been proposed. The technology for this is widely disclosed in Prior Art 1 (Registration No. 10-1881421) and Prior Art 2 (Registration No. 10-1669893). However, the above-mentioned prior arts cause the following problems due to their structural limitations.

[0009] First, in the case of prior art 1, due to its structural limitations, when connecting the link abutment and base abutment, which have a polygonal shape, there is often a problem that the crown screw may break because they are not connected accurately but rather misaligned.

[0010] Second, when a patient chews for a long time, vibration is bound to occur, but in the case of prior art 1, there is a problem that the crown screw connecting the link abutment and the base abutment may loosen due to vibration when used for a long time due to its structural limitations.

[0011] Third, in the case of prior art 1, there is a problem that periodontitis may occur due to severe odor and bacterial growth as saliva and food enter the mechanical gap between the link abutment and the base abutment due to its structural limitations.

[0012] Fourth, in the case of prior art 2, since the inner surface of the crown prosthesis and the abutment are attached using an adhesive called cement, there is a problem that periodontitis may occur due to excess cement.

[0013] The present invention aims to provide a dental abutment assembly that can prevent a crown screw from breaking or loosening by accurately fastening a link abutment and a base abutment by manufacturing it with an efficient structure different from the conventional one, and that not only does not cause a mechanical gap between the link abutment and the base abutment, but also effectively prevents periodontitis from occurring due to excess cement by not using cement.

[0014] A dental abutment assembly according to the present invention comprises: a base abutment coupled to a fixture; a link abutment coupled to the base abutment; and a crown screw fixed to the base abutment via the link abutment through a crown placed on the link abutment, thereby fixing the crown, wherein the link abutment is made of an elastic body and is coupled to the base abutment through an undercut surface.

[0015] The above link abutment can be manufactured by injection molding of nylon synthetic resin.

[0016] The above base abutment may include a fixture coupling portion manufactured in a screw shape and coupled to the fixture; a base abutment body formed at one end of the fixture coupling portion and having a cross-sectional area that gradually increases toward the opposite end of the fixture coupling portion; a protruding coupling portion formed to protrude from an end region of the base abutment body and providing a position for coupling the link abutment; and a plurality of base undercut portions formed on a circumferential surface of the protruding coupling portion and coupled to the link abutment.

[0017] The above link abutment may include an abutment body; a screw passage formed penetrating the abutment body and through which the crown screw passes; and a plurality of link undercut portions formed on the inner surface of the abutment body and connected to a base undercut portion of the base abutment.

[0018] The sizes of the above link undercuts are different from each other, and the abutment body can have a tapered structure in which the cross-sectional area gradually widens toward the end.

[0019] According to the present invention, since it is manufactured with an efficient structure different from the conventional one, the link abutment and the base abutment can be accurately fastened, thereby preventing the phenomenon of the crown screw breaking or loosening, and since no mechanical gap occurs between the link abutment and the base abutment, and since cement is not used, there is an effect of effectively preventing periodontitis from occurring due to excess cement.

[0020] FIG. 1 is a perspective view of a dental abutment assembly according to one embodiment of the present invention.

[0021] Figure 2 is a longitudinal cross-sectional view of Figure 1.

[0022] Figure 3 is a side exploded view of Figure 1.

[0023] Figure 4 is a perspective view of the base abutment.

[0024] Figures 5 to 7 are drawings showing the base abutment of Figure 4 from different angles.

[0025] Figure 8 is a perspective view of a link abutment.

[0026] Figures 9 to 12 are drawings showing the link abutment of Figure 8 from different angles.

[0027] FIG. 13 is a perspective view of a link abutment applied to a dental abutment assembly according to one embodiment of the present invention.

[0028] Figures 14 to 17 are drawings showing the link abutment of Figure 13 from different angles.

[0029] Below, with reference to the attached drawings, an embodiment of the present invention is described in detail so that a person having ordinary skill in the art to which the present invention pertains can easily carry out the present invention.

[0030] However, since the description of the present invention is merely an example for structural or functional explanation, the scope of the present invention should not be construed as being limited by the example described in the text.

[0031] For example, the embodiments may be modified in various ways and may take various forms, so the scope of the present invention should be understood to include equivalents that can realize the technical idea.

[0032] In addition, the purpose or effect presented in the present invention does not mean that a specific embodiment must include all of them or include only such effects, and therefore the scope of the present invention should not be understood as being limited thereby.

[0033] In this specification, the present embodiments are provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. The present invention is defined solely by the scope of the claims.

[0034] Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques are not specifically described to avoid obscuring the present invention.

[0035] Meanwhile, the meanings of terms described in the present invention are not limited to dictionary meanings and should be understood as follows.

[0036] When a component is said to be "connected" to another component, it should be understood that while it may be directly connected to that other component, there may also be other components intervening. Conversely, when a component is said to be "directly connected" to another component, it should be understood that there are no other components intervening. Similarly, other expressions describing relationships between components, such as "between" and "directly between," or "adjacent to" and "directly adjacent to," should be interpreted similarly.

[0037] Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "has" should be understood to specify the presence of a stated feature, number, step, operation, component, part, or combination thereof, but not to exclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0038] All terms used herein, unless otherwise defined, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

[0039] Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the contextual meaning of the relevant technology, and cannot be interpreted as having an ideal or overly formal meaning unless explicitly defined in the present invention.

[0040] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the embodiments, the same reference numerals will be assigned to the same components, and in some cases, the description of the same reference numerals will be omitted.

[0041] (One example)

[0042] FIG. 1 is a perspective view of a dental abutment assembly according to an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view of FIG. 1, FIG. 3 is a side exploded view of FIG. 1, FIG. 4 is a perspective view of a base abutment, FIGS. 5 to 7 are views illustrating the base abutment of FIG. 4 from different angles, FIG. 8 is a perspective view of a link abutment, and FIGS. 9 to 12 are views illustrating the link abutment of FIG. 8 from different angles.

[0043] Referring to these drawings, the dental abutment assembly (100) according to the present embodiment is manufactured with an efficient structure different from the conventional one, so that the link abutment (130) and the base abutment (110) can be accurately fastened, thereby preventing the crown screw (150) from breaking or loosening, and since no mechanical gap occurs between the link abutment (130) and the base abutment (110), and since no cement is used, periodontitis caused by excess cement can be effectively prevented.

[0044] A dental abutment assembly (100) according to the present embodiment capable of providing such effects may include a base abutment (110), a link abutment (130), and a crown screw (150).

[0045] The base abutment (110) is a structure that is connected to a fixture. As mentioned above, the fixture is implanted into the alveolar bone to form a tooth root.

[0046] The base abutment (110) is manufactured in a screw shape and includes a fixture connecting portion (111) that is connected to a fixture, a base abutment body (112) that is formed at one end of the fixture connecting portion (111) and has a cross-sectional area that gradually increases toward the opposite end of the fixture connecting portion (111), and a protruding connecting portion (113) that is formed to protrude from an end region of the base abutment body (112) and provides a location for connecting a link abutment (130).

[0047] In the structure of this base abutment (110), the protruding height of the protruding joint (113) from the gums is manufactured relatively low. This has the advantage of securing space for teeth, thereby reducing clinical limitations.

[0048] In this embodiment, a plurality of base undercut portions (114) that are coupled with a link abutment (130) are formed on the circumferential surface of the protruding connecting portion (113) forming the base abutment (110). The plurality of base undercut portions (114) are provided at equal intervals along the circumferential surface of the protruding connecting portion (113).

[0049] A screw fastening groove (115) into which a crown screw (150) is fastened is formed inside the protruding joint (113) and the base abutment body (112). Accordingly, the crown screw (150) can be fastened firmly as shown in Fig. 2.

[0050] Meanwhile, the link abutment (130) is a structure that is connected to the base abutment (110). A crown can be placed on the link abutment (130).

[0051] In particular, in the present embodiment, the link abutment (130) is made of an elastic material and is connected to the base abutment (110) through an undercut surface. For example, in the present embodiment, the link abutment (130) may be made by injection molding of nylon synthetic resin.

[0052] Such a link abutment (130) may include an abutment body (131), a screw passage (132) formed penetrating the abutment body (131) and through which a crown screw (150) passes, and a plurality of link undercut portions (133) formed on the inner surface of the abutment body (131) and connected to a base undercut portion (114) of a base abutment (110).

[0053] At this time, the sizes of the link undercut portions (133) formed in the link abutment (130) are different from each other. In addition, the abutment body (131) has a tapered structure in which the cross-sectional area gradually widens toward the end.

[0054] As in this embodiment, when the base undercut portion (114) is formed in the base abutment (110) and the link undercut portion (133) is formed in the link abutment (130), when the link abutment (130) is fastened to the base abutment (110), for example, a clicking sound or a rattling sensation is heard. Therefore, the operator can know that the fastening is complete, thereby reducing fastening errors.

[0055] And, in the case of the present embodiment, since the link abutment (130) is manufactured by injection molding of an elastic elastic body, such as nylon synthetic resin, the vibration of the patient's chewing is absorbed through the link abutment (130) made of nylon, and thus the vibration is not directly transmitted to the crown screw (150), and thus the loosening phenomenon of the crown screw (150) is significantly reduced compared to the past.

[0056] Compared to a device that is fastened only with a conventional crown screw (150), the dental abutment assembly (100) according to the present embodiment is first fastened by the link undercut portion (133) of the link abutment (130) made of nylon material to the base undercut portion (114) of the base abutment (110) made of titanium material, that is, first fastened by the tension of the nylon material, and then secondarily fastened by the crown screw (150), so that a stronger and more solid fastening force can be provided.

[0057] In addition, since the link was made of titanium in the past, a mechanical gap was bound to occur between it and the base abutment (110), but in the dental abutment assembly (100) according to the present embodiment, the link undercut portion (133) of the link abutment (130) made of nylon is fastened to the base undercut portion (114) of the base abutment (110) made of titanium, so no gap occurs between them. Therefore, saliva and food do not enter at the source, making it impossible for bacteria to grow.

[0058] In addition, since the abutment body (131) of the link abutment (130) made of nylon material has a tapered structure in which the cross-sectional area gradually widens toward the end, an undercut is created on the inner surface of the crown prosthesis, and it can be fixed only with the tension of the link abutment (130) without cement, so there is no occurrence of periodontitis due to excess cement because cement is not used.

[0059] According to the present embodiment, which operates based on the structure described above, since it is manufactured with an efficient structure different from the conventional one, the link abutment (130) and the base abutment (110) can be accurately fastened, thereby preventing the crown screw (150) from breaking or loosening, and since no mechanical gap occurs between the link abutment (130) and the base abutment (110), and since cement is not used, periodontitis caused by excess cement can be effectively prevented.

[0060] (Other examples)

[0061] Fig. 13 is a perspective view of a link abutment applied to a dental abutment assembly according to one embodiment of the present invention, and Figs. 14 to 17 are drawings showing the link abutment of Fig. 13 from different angles.

[0062] Referring to these drawings, the link abutment (230) may be applied in the form of FIGS. 13 to 17. Of course, the function and role are the same as in the aforementioned embodiment. That is, the link abutment (230) is manufactured from an elastic material and is connected to the base abutment (110) through an undercut surface. For example, in the present embodiment, the link abutment (230) may be manufactured by injection molding of nylon synthetic resin.

[0063] Such a link abutment (230) may include an abutment body (231), a screw passage (232) formed penetrating the abutment body (231) and through which a crown screw (250) passes, a plurality of link undercut portions (233) formed on the inner surface of the abutment body (231) and connected to a base undercut portion (114) of a base abutment (110), and a link flange portion (235) forming the bottom surface of the abutment body (231) and in contact with a base flange portion (116) of the base abutment (110).

[0064] At this time, the sizes of the link undercut portions (233) formed in the link abutment (230) are different from each other. In addition, the abutment body (231) has a tapered structure in which the cross-sectional area gradually widens toward the end, as in the above-described embodiment.

[0065] Even if this embodiment is applied, since it is manufactured with an efficient structure different from the conventional one, the link abutment (130) and the base abutment (110) can be accurately fastened, thereby preventing the crown screw (150) from breaking or loosening, and since no mechanical gap occurs between the link abutment (130) and the base abutment (110), and since cement is not used, periodontitis caused by excess cement can be effectively prevented.

[0066] As such, the present invention is not limited to the described embodiments, and it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications and variations should be considered to fall within the scope of the claims of the present invention.

[0067] The functional brick according to the present invention, the wall construction method using the same, and the foundation floor of a structure can be applied to wall construction and the foundation floor of a structure.

Claims

1. Base abutment attached to the fixture; A link abutment bonded to the above base abutment; and A crown screw is included to secure the crown by being connected to the base abutment via the link abutment through the crown placed on the link abutment. A dental abutment assembly, characterized in that the link abutment is made of an elastic elastic body and is connected to the base abutment through an undercut surface.

2. In paragraph 1, A dental abutment assembly characterized in that the above link abutment is manufactured by injection molding of nylon synthetic resin.

3. In paragraph 1, The above base abutment is, A fixture joint manufactured in a screw shape and joined to the fixture; A base abutment body formed at one end of the fixture joint, with a cross-sectional area gradually increasing toward the opposite end of the fixture joint; A protruding connecting portion formed to protrude from the end region of the base abutment body to provide a place for the link abutment to be connected; and A dental abutment assembly characterized by including a plurality of base undercut portions formed on the circumferential surface of the protruding joint portion and coupled with the link abutment.

4. In paragraph 3, The above link abutment is, abutment body; A screw passage formed through the abutment body and through which the crown screw passes; and A dental abutment assembly characterized by including a plurality of link undercut portions formed on the inner surface of the abutment body and connected to the base undercut portion of the base abutment.

5. In paragraph 4, The sizes of the above link undercuts are different, A dental abutment assembly characterized in that the abutment body has a tapered structure whose cross-sectional area gradually widens toward the end.

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