Zirconia abutment

Abstract

The present invention is to provide a zirconia abutment which increases a coupling force between an implant body and a zirconia abutment constituting an implant system to prevent the abutment from being loosened, compensates for a cracking disadvantage of zirconia, and provides an esthetic effect. The present invention provides a zirconia abutment comprising: an abutment body made of a zirconia material; and an abutment connector coupled to a lower portion of the abutment body, wherein the abutment connector has a fastening part fixedly inserted into a fastening groove of the abutment body at an upper end thereof, and is integrally coupled to the abutment body, and, in a state where the abutment body and the abutment connector are integrally coupled to each other, the zirconia abutment is coupled to the implant body by a fastening screw that penetrates to the inside of the implant body and is fastened to the female screw portion formed on the upper inner side of the implant body.

Description

zirconia abutment

[0001] The present invention relates to a zirconia abutment, and more specifically, to a zirconia abutment in which the metal abutment is exposed above the gums when the fit between the patient and the oral cavity is poor in the case of the existing abutment, and thus the existing abutment is formed with an upper zirconia material core portion and a lower titanium material connecting portion, thereby maintaining aesthetics when the abutment is exposed above the gums.

[0002] In general, an implant system is composed of an implant body that is osseointegrated into the alveolar bone and performs a root function, an abutment that is fixed to the implant body and exposed to the upper side of the alveolar bone, and an artificial tooth that is attached to and surrounds the abutment and performs a tooth function.

[0003] The implant body is implanted into the alveolar bone of a dental patient to allow osseointegration like a tooth root, and then an abutment is screwed onto the implant body to fix it, and then an artificial tooth is attached to the abutment, thereby completing the implant system's surgical operation.

[0004] However, since the abutment is made of metal, the color of the metal itself is easily exposed to the outside when the gums are thin or low, which reduces the aesthetic appeal, and there is a problem that the aesthetic satisfaction of patients after implant surgery is low.

[0005] To solve such problems, zirconia, which can produce a color similar to artificial teeth and has translucent properties, is attracting attention as a material for components that make up implant systems, and zirconia is widely used in the manufacture of integrated or one-body implants in which the part implanted into the alveolar bone and the part supporting the artificial tooth are integrated. However, integrated implant systems made of zirconia have limitations in prosthodontics as an integrated upper part, and have the disadvantages of being difficult to remove from the alveolar bone in the event of implant surgery failure and being vulnerable to load.

[0006] In addition, to solve these problems, Korean Patent No. 1469833 discloses a customized zirconia abutment, which is composed of a link body (3) having a screw hole to be combined with a zirconia cap (2) as shown in FIG. 1, and a screw (1) for being connected to an implant body (4), and the zirconia abutment has a structure in which a lower portion of a link connected to the lower portion is connected to the implant body by a screw.

[0007] However, the biggest problem with custom zirconia abutments manufactured in this way is that when manufacturing an abutment with zirconia, fully sintered zirconia is difficult to cut, so semi-sintered zirconia is processed and then fully sintered. However, after fully sintering, a significant amount of shrinkage occurs, which reduces precision.

[0008] In addition, due to the presence of a screw hole for connection to the implant body, there is a problem in that it cannot be used if the implant body implanted in the alveolar bone is not in the correct position.

[0009] In addition, the decrease in the precision of the joint of the link body (3) having a screw hole that is combined with the zirconia cap (2) causes serious gaps in several areas between the implant body (4) that is inserted into and fixed in the alveolar bone and the link body (3), and these gaps cause the fixing screw that connects the implant body and the abutment to loosen due to external vibration, and furthermore, there is a problem that bacteria can penetrate through the gaps.

[0010] [Prior Art Literature]

[0011] (Patent Document 0001) Korean Patent Registration No. 10-1469833

[0012] The present invention has been devised to solve the problems of the prior art as described above, and its purpose is to provide a zirconia abutment that increases the bonding strength between an implant body and a zirconia abutment constituting an implant system, thereby preventing loosening of the abutment, while also compensating for the disadvantage of zirconia breaking and providing an aesthetic effect.

[0013] In order to achieve the above-described purpose, the present invention provides a zirconia abutment comprising an abutment body made of zirconia material and an abutment connecting body connected to the lower part of the abutment body.

[0014] The above abutment connecting body has a fastening part that is fitted into and fixed to the fastening groove of the abutment body at the top, and is integrally connected with the abutment body.

[0015] The above zirconia abutment provides a zirconia abutment that is connected to the implant body by a fastening screw that penetrates the inside of the abutment body and is fastened to a female thread portion formed on the upper inner side of the implant body in a state where the abutment body and the abutment connecting body are integrally connected.

[0016] And the abutment connector may have a fixing portion formed in the shape of a polygonal column so that it can be fitted into and fixed in the insertion groove of the implant body at the bottom, a contact portion formed in the shape of a cone with an upper and lower angle so that it can be fitted into the cone-shaped abutment insertion hole of the insertion groove of the implant body at the upper end of the fixing portion, and a guide surface located at the upper end of the contact portion so that it is fitted into the joining hole of the abutment body and the direction is determined together with the contact.

[0017] Additionally, the guide surface may be formed such that the facing guide surfaces are parallel planes.

[0018] In addition, the abutment connecting body has a circular vertical portion between the contact portion and the guide surface, and has an elastic portion and the fastening portion on the upper side of the circular vertical portion, and the elastic portion and the fastening portion may have a vertical cutting groove having a predetermined width so that they can be divided into a plurality of portions in the circumferential direction.

[0019] And, the elastic portion of the abutment connecting body may be formed as a concave circumferential surface with a certain depth radially inward from the connecting portion so as to have a thickness thinner than the thickness of the connecting portion, and the connecting portion on the upper side may have a plurality of protrusions protruding at a certain height in the circumferential direction.

[0020] According to another embodiment of the present invention, the through hole of the abutment connecting body can be formed so that the inner diameter of the portion where the elastic portion and the fastening portion are located gradually narrows as it goes downward.

[0021] In addition, a connecting fitting having an outer peripheral step structure connecting the circular vertical portion and the elastic portion may be formed on the upper portion of the circular vertical portion of the abutment connecting body, and a support portion supporting the lower surface of the abutment body may be further provided on the lower portion of the circular vertical portion of the abutment connecting body.

[0022] And the abutment body may have a fitting portion formed of a cylindrical inner surface that is in surface contact with the upper surface of the support portion of the abutment connector, and is fitted into the circular vertical portion of the abutment connector on the upper side of the lower surface, a mounting surface formed on the upper side of the fitting surface, and a fastening groove formed of a circumferential concave groove so that the protrusion of the abutment connector can be received and fixed on the upper side of the mounting surface, and in addition, the abutment connector may be made of titanium.

[0023] By the present invention

[0024] First, by integrally bonding the abutment body made of zirconia to the upper part of the abutment connector, the area around the abutment does not appear to be metallic in color and instead takes on a color similar to that of the teeth, thereby maintaining an aesthetically improved state, which has a remarkable effect.

[0025] Second, the abutment made of the above zirconia material is connected through an abutment connector made of titanium material, so that loosening is prevented even when repeated load is applied to the artificial tooth.

[0026] Third, since the abutment body and the abutment connector are provided to the surgeon in an integral state, it provides convenience of treatment to the surgeon and has a beneficial effect on quality control of the zirconia abutment.

[0027] Fourth, the connection work can be done at an accurate position by the abutment connecting body and the guide part provided in the abutment, thereby minimizing the connection error and improving the strength and aesthetic function.

[0028] Figure 1 is a schematic diagram showing the bonding state of an implant according to the prior art.

[0029] Figure 2 is an external view and cross-sectional view showing a dental implant system according to the present invention.

[0030] Figure 3 is an exploded perspective view of an abutment body and an abutment connecting body according to the present invention.

[0031] Figure 4 is a cross-sectional view of a zirconia abutment in which an abutment body and an abutment connecting body are integrally connected according to the present invention.

[0032] Figure 5 is a detailed drawing for explaining an abutment connector according to the present invention.

[0033] Figure 6 is a detailed drawing for explaining an abutment body according to the present invention.

[0034] Hereinafter, a zirconia abutment according to an embodiment of the present invention will be described in detail with reference to the attached drawings. The present invention can be modified in various ways and can take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, but it should be understood that the invention includes all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention. In describing each drawing, similar reference numerals are used to indicate similar components. In the attached drawings, the dimensions of structures are shown larger than actual size to ensure clarity of the present invention.

[0035] The terminology used in this application is used only to describe specific embodiments and is not intended to limit the present invention. Unless otherwise defined, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined in this application.

[0036] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0037] The attached drawings, FIG. 2, are drawings showing the appearance and cross-section of a dental implant system according to an example of the present invention, FIG. 3 is an exploded perspective view of an abutment body and an abutment connecting body, and FIG. 4 is a cross-sectional view of a zirconia abutment in which the abutment body and the abutment connecting body are integrally connected.

[0038] In addition, FIGS. 5 and 6 are detailed views of the abutment connector and the abutment body according to the present invention, respectively.

[0039] As illustrated in FIGS. 2 to 6, the zirconia abutment according to the present invention comprises an abutment body (300) made of zirconia and an abutment connector (200) coupled to the lower portion of the abutment body (300). Here, the abutment connector (200) may be made of titanium.

[0040] And the abutment connector (200) has a fastening part (240) that is fitted into and fixed to the fastening groove (350) of the abutment body (300) at the top, and is integrally connected with the abutment body (300).

[0041] The above zirconia abutment (500) is connected to the implant body (100) by a fastening screw (400) that penetrates the inside of the abutment body (300) and is connected to a female screw portion (130) formed on the upper inner side of the implant body (100) while the abutment body (300) and the abutment connector (200) are connected as one piece.

[0042] The implant body (100) includes an insertion groove (110) extending vertically downward from the top to a certain depth, and the insertion groove (110) is a portion into which the lower part of the abutment connector (200) is inserted, and has an upper cone-shaped abutment insertion hole (111) having a cross-sectional shape of a circular shape and a shape structure in which the inner diameter width gradually narrows downward, and a position fixing part (112) formed of a polygonal groove having a polygonal cross-sectional shape so that the abutment connector (200) of the zirconia abutment (500) of the present invention can be fixed at a desired position while extending further downward while connected to the abutment insertion hole (111), and a female screw part (130) to which the fastening screw (400) is fastened is configured below the position fixing part (112).

[0043] Next, the abutment connecting body (200) forming the zirconia abutment (500) of the present invention has a fixing part (210) formed in a polygonal column shape so as to be fitted into and fixed in the insertion groove (110) at the bottom, a contact part (220) located at the upper end of the fixing part (210) and formed in a cone shape with an upper and lower angle so as to be fitted into the cone-shaped abutment insertion hole (111) of the insertion groove (110), and a guide surface (230) located at the upper end of the contact part (220) and fitted into the connecting hole (310) of the abutment body (300) so as to determine the direction along with the fit.

[0044] The above-mentioned fixed part (210) is illustrated in Fig. 3 as having a hexagonal cross-sectional shape, but the hexagonal shape is presented as one example, and in addition to the hexagonal shape, it can be formed to have a polygonal shape such as an octagon or a dodecagon.

[0045] In addition, the above-mentioned contact portion (220) is formed in a cone shape with an outer diameter that gradually widens upwards in a lower portion having a diameter equal to or larger than the diameter of a circle circumscribed to the polygon of the above-mentioned fixing portion (210), so that the outer surface of the cone is in close contact with the inner surface of the cone-shaped abutment insertion hole (111) of the above-mentioned implant body.

[0046] And it is preferable that the above guide surface (230) is formed with facing guide surfaces (231, 232) that are parallel planes.

[0047] In addition, the abutment connector (200) has a circular vertical portion (270) between the contact portion (220) and the guide surface (230), and has an elastic portion (260) and a fastening portion (240) on the upper side of the circular vertical portion (270), and as shown in FIG. 5, the elastic portion (260) and the fastening portion (240) may have a vertical cutting groove (250) having a predetermined width so that they can be divided into a plurality of portions in the circumferential direction.

[0048] In addition, the elastic portion (260) of the abutment connector (200) may be formed as a concave circumferential surface with a predetermined depth (t3) radially inward from the fastening portion (240) so as to have a thickness (t2) thinner than the thickness (t1) of the fastening portion (240) as shown in (b) of FIG. 5, and the upper fastening portion (240) may be configured to have a plurality of protrusions (241, 242) protruding in the circumferential direction at a predetermined height.

[0049] As one embodiment of the present invention, the joining hole (290) of the abutment connecting body (200) constituting the zirconia abutment of the present invention may be formed so that the inner diameter of the portion where the elastic portion (260) and the fastening portion (240) are located gradually narrows as it goes downward.

[0050] By the structure of the fastening portion (240), the cutting groove (250), and the elastic portion (260) as described above, these structures can exert elasticity in the outer diameter direction, and in particular, if the inner diameter of the joint hole (290) of the abutment connector (200) where the elastic portion (260) and the fastening portion (240) are located is formed so that the radius gradually narrows as it goes downward, and if the outer diameter of the head of the fastening screw (400) inserted into the joint hole (290) is formed larger than the narrowed radius, when the fastening screw (400) is fastened, the head of the fastening screw (400) presses the narrowed radius portion, causing the elastic portion (260) and the fastening portion (240) to spread apart in the radial direction, thereby promoting a more solid joint between the abutment body (300) and the abutment connector (200).

[0051] And as shown in Fig. 5, a connecting fitting part (265) having an outer peripheral step structure connecting the circular vertical part (270) and the elastic part (260) may be formed on the upper part of the circular vertical part (270) of the abutment connecting body (200), and a support part (280) that supports the lower surface (320) of the abutment body (300) by making surface contact with the lower surface (320) of the circular vertical part (270) of the abutment connecting body (200) and on the upper part of the contact part (220) is further provided.

[0052] The above-mentioned support member (280) is formed in a flange shape with a flat upper surface (281), and is formed in a shape that can have an inclined surface (282) whose outer diameter gradually narrows downward from the lower portion at the outer end of the upper surface (281).

[0053] In addition, the upper surface (281) can widely distribute the load transferred to the lowest section (320) of the abutment body (300), and the structural rigidity can be further increased by the lower inclined surface (282), thereby functioning as a better defense means against fatigue fracture situations.

[0054] The upper outer surface where the elastic portion (260) and the fastening portion (240), which are the main components of the abutment connecting body (200) constituting the zirconia abutment of the present invention, are located may be provided with a guide surface (230) made of parallel planes at a constant interval (p).

[0055] The above guide surface (230) is formed as a parallel plane and is in surface contact with the mounting surface (340) inside the abutment body (300), so that the abutment connector (200) can be inserted at a certain angle with the abutment body (300), and unwanted rotational movement can be restrained. After the abutment body (300) is assembled, the abutment body (300) and the abutment connector (200) can be prevented from becoming loose or shaking due to external vibration.

[0056] In addition, the abutment body (300) constituting the zirconia abutment of the present invention may be provided with a lower surface (320) that is in surface contact with the upper surface (281) of the support portion (280) of the abutment connector (200), an insertion portion (330) formed of a cylindrical inner surface that is inserted into the circular vertical portion (270) of the abutment connector on the upper side of the lower surface (320), a mounting surface (340) on the upper side of the insertion portion (330) that is in surface contact with the guide surface (230) of the abutment connector (200), and a fastening groove (350) formed of a circumferential concave groove so that the protrusions (241, 242) of the abutment connector (200) can be received and fixed on the upper side of the mounting surface (340).

[0057] And the lowermost end surface (320) of the abutment body (300) can be formed as a plane that can have a certain bottom surface, and can be formed to be in surface contact with the upper surface (281) of the support portion (280) of the abutment connecting body (200).

[0058] Next, the upper side of the lowermost section (320), that is, the vertical through hole inside the through hole (390), has a circular cross-sectional shape, and an insertion portion (330) is formed that engages with the circular vertical portion (270) of the abutment connector (200), and a seating surface (340) formed of parallel planes at a predetermined interval (p) is provided above the insertion portion (330), and guides the abutment body (300) so that it can be inserted into a predetermined position while engaging with the guide surface (230) provided in the elastic portion (260) and the fastening portion (240) of the abutment connector (200), and can restrain unwanted rotational movement.

[0059] On the upper side of the above-mentioned mounting surface (340), a fastening groove (350) is provided, which is a circumferential concave groove of a certain depth, into which the protrusions (241, 242) of the fastening portion (240) can be inserted, and the fastening portion (240) is elastically connected by the structure formed by the protrusions (241, 242) of the fastening portion (240), the cut groove (250), and the elastic portion (260).

[0060] And, the zirconia abutment of the present invention, which is fitted into the insertion groove (110) of the implant body (100) that is implanted during the implant procedure, is formed so that the inner diameter of the portion where the elastic portion (260) and the fastening portion (240) are located in the joining hole (290) of the abutment connecting body (200) constituting the zirconia abutment gradually narrows in radius as it goes downwards, and the outer diameter of the head of the fastening screw (400) inserted into the joining hole (290) is formed larger than the narrowed radius, so that when the fastening screw (400) is fastened, the head portion of the fastening screw (400) presses the narrowed radius portion, causing the elastic portion (260) and the fastening portion (240) to spread in the radial direction, so that the protrusions (241, 242) of the fastening portion (240) of the abutment connecting body (200) are inserted into the fastening groove (350) of the abutment body (300) and fastened at the same time as the abutment The circular vertical portion (270) of the connector (200) and the fitting portion (330) of the abutment body (300) are interlocked, and the lowermost end surface (320) is in surface contact with the upper surface (281) of the support portion (280) of the abutment connector (200), thereby allowing for double adhesion, thereby preventing the inflow of foreign substances or the penetration of bacteria.

[0061] Although the present invention has been described in detail through specific embodiments, this is intended to specifically explain the present invention, and the present invention is not limited thereto, and it is clear that modifications and improvements can be made by those skilled in the art within the technical spirit of the present invention.

[0062] All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be made clear by the appended claims.

[0063]

[0064] [Explanation of symbols]

[0065] 100: Implant body

[0066] 110: Insertion groove

[0067] 111: Cone-shaped abutment insertion hole

[0068] 112: Position fixing unit

[0069] 130: Female screw

[0070] 200: Abutment connector

[0071] 210: Fixed part

[0072] 220: Adhesive

[0073] 230: Guide surface

[0074] 240: Fastening part

[0075] 250: Incision groove

[0076] 260: Elasticity

[0077] 265: Connecting fitting

[0078] 270: Circular vertical section

[0079] 280: Support

[0080] 281: Top surface

[0081] 282: Slope

[0082] 290: Combined hole

[0083] 300: Abutment body

[0084] 320: Bottom surface

[0085] 330: Fitting joint

[0086] 340: Anchak-myeon

[0087] 350: Contract Home

[0088] 390: Penetration hole

[0089] 400: Fastening screw

[0090] 500: Zirconia abutment

Claims

1. In a zirconia abutment composed of an abutment body made of zirconia material and an abutment connector joined to the lower part of the abutment body, The above abutment connecting body has a fastening part that is fitted into and fixed to the fastening groove of the abutment body at the top, and is integrally connected with the abutment body. The above zirconia abutment is a zirconia abutment in which the abutment body and the abutment connecting body are integrally connected, and is connected to the implant body by a fastening screw that penetrates the inside thereof and is fastened to a female thread portion formed on the upper inner side of the implant body.

2. In paragraph 1, The above abutment connector A fixing part formed in the shape of a polygonal pillar so that it can be inserted and fixed into the insertion groove of the implant body at the bottom, A contact portion having a cone shape with a top and bottom angle so that it can be positioned at the top of the above-mentioned fixed portion and fit tightly into the cone-shaped abutment insertion hole of the above-mentioned insertion groove, A zirconia abutment characterized by having a guide surface located at the upper end of the above-mentioned contact portion and fitted into the joint hole of the abutment body to determine the direction along with the contact.

3. In paragraph 2, The above guide surface is A zirconia abutment characterized in that the opposing guide surfaces are formed as parallel planes.

4. In paragraph 2, The above abutment connector A circular vertical portion is provided between the above-mentioned contact portion and the above-mentioned guide surface, An elastic part and a fastening part are provided on the upper side of the above circular vertical part, A zirconia abutment characterized in that the elastic portion and the fastening portion have a vertical cutting groove having a predetermined width so that the elastic portion and the fastening portion can be divided into a plurality of parts in the circumferential direction.

5. In paragraph 4, A zirconia abutment characterized in that the elastic portion of the abutment connecting body is formed as a concave circumferential surface with a predetermined depth (t3) radially inward from the connecting portion so as to have a thickness (t2) thinner than the thickness (t1) of the connecting portion, and the connecting portion on the upper side has a plurality of protrusions protruding at a predetermined height in the circumferential direction.

6. In paragraph 5, A zirconia abutment characterized in that the inner diameter of the joint hole of the above abutment connector where the elastic portion and the fastening portion are located is formed so that the radius gradually narrows as it goes downward.

7. In paragraph 4, A zirconia abutment characterized in that the lower portion of the circular vertical portion of the abutment connecting body further includes a support portion that supports the lower surface of the abutment body.

8. In paragraph 7, The above abutment body is, The lower surface is in surface contact with the upper surface of the support portion of the abutment connecting body, A fitting portion formed of a cylindrical inner surface that is fitted into the circular vertical portion of the abutment connecting body on the upper side of the lower surface, A mounting surface in which the guide surface of the abutment connector is in surface contact with the upper side of the above-mentioned fitting portion, A zirconia abutment characterized by having a fastening groove formed of a circumferential concave groove so that a protrusion of the abutment connecting body can be received and fixed on the upper side of the above-mentioned securing surface.

9. In any one of paragraphs 1 to 8, A zirconia abutment characterized in that the above abutment connector is made of titanium.

Images