Dental abutment having triple structure and dental implant system including same

Abstract

The present invention relates to a dental implant system and, more specifically, to a dental abutment and a dental implant system including same, the dental abutment having a triple structure in which an elastic body is inserted into the abutment to absorb and buffer occlusal force transmitted from a crown (artificial tooth / prosthesis).

Description

Dental abutment having a triple structure and dental implant system equipped therewith

[0001] The present invention relates to a dental implant system, and more particularly, to a dental abutment having a triple structure in which an elastic body is inserted into the inside of the abutment to absorb and buffer occlusal force transmitted from a crown (artificial tooth / prosthesis), and a dental implant system having the same.

[0002] A dental implant system basically includes a fixture that is implanted into the alveolar bone, an abutment that is fixed to the fixture and supports the pressure corresponding to the occlusal force applied during chewing, and a crown (artificial tooth / prosthesis) that restores the aesthetic beauty similar to that of a natural tooth by restoring the upper part of the abutment, i.e. the post.

[0003] Conventional dental implant systems with this configuration lack components capable of absorbing occlusal forces, like the periodontal ligament of a natural tooth. Consequently, repeated occlusal forces applied to the crown during mastication can lead to fracture of underlying structures, such as the fixture, abutment, and / or abutment screw.

[0004] In particular, crowns are made of relatively hard materials to effectively crush food during chewing. For example, crowns are manufactured by casting dental metal or dental gold, or by machining zirconium oxide blocks using CAD / CAM. Therefore, repeated occlusal forces applied to crowns can exacerbate fractures of underlying structures, such as fixtures, abutments, and / or abutment screws.

[0005] [Prior Art Literature]

[0006] [Patent Document]

[0007] (Patent Document 1) KR 10-2480663 B1, December 20, 2022.

[0008] (Patent Document 2) KR 10-2480666 B1, December 20, 2022.

[0009] (Patent Document 3) KR 10-2527940 B1, April 26, 2023.

[0010] Accordingly, the present invention provides a dental abutment having a triple structure capable of absorbing and buffering occlusal force transmitted from a crown (artificial tooth / prosthesis) to prevent fracture of a fixture, an abutment, and / or an abutment screw, which are substructures of the crown, and a dental implant system having the same.

[0011] In addition, the present invention is not limited to the above-described purpose, and various other purposes may be additionally provided through the techniques described in the embodiments and claims described below.

[0012] In order to achieve the above object, the present invention according to an embodiment provides a dental abutment having a triple structure including a base coupled to a fixture implanted in an alveolar bone; an elastic body installed to surround an outer surface of the base; and an outer cover installed to surround an outer surface of the elastic body, and further including a fall-off prevention cap that prevents the outer cover from falling off from the base, and a crown attached to an outer surface of the outer cover using an adhesive.

[0013] Additionally, the base may include a lower part coupled to the fixture; an upper part formed on an upper portion of the lower part and covered by the elastic body; and a blunt protrusion formed at a boundary between the lower part and the upper part.

[0014] Additionally, a circumferential groove or a cutting groove may be formed on the side of the upper part to accommodate a portion of the elastic body.

[0015] In addition, the base may be fixedly joined to the fixture through an abutment screw inserted into the hollow, and the elastic body may be installed to cover the outer surface of the upper part and the outer surface of the head of the abutment screw protruding upward from the upper part.

[0016] In addition, the elastic body may be formed as an integral structure in which a portion covering the outer surface of the upper part and a portion covering the outer surface of the head of the abutment screw protruding from the upper part are formed integrally, or as a separate structure in which the portion covering the outer surface of the head of the abutment screw protruding from the upper part are formed separately from each other.

[0017] In addition, the abutment screw may include a screw portion that is fixedly coupled to the fixture; and a head portion formed on an upper portion of the screw portion, a portion of which protrudes upwardly from the base, and a portion of which protrudes upwardly from the base is supported downwardly by being hooked to an upper portion of the base.

[0018] Additionally, a circumferential groove or cutting groove for accommodating a portion of the elastic body may be formed on the outer surface of the head of the abutment screw.

[0019] In addition, the head of the abutment screw may have a driver groove formed in the center, and a joining groove formed on the upper portion of the driver groove to which the screw portion of the anti-fall cap is joined.

[0020] In addition, the elastic body may be any one selected from among a silicone material, a synthetic rubber material such as fluoroelastomer, a metal material in the form of elastic fabric, or a synthetic resin material.

[0021] Additionally, a flange portion may be formed on the lower part of the outer cover to cover the blunt protrusion.

[0022] In addition, the above-mentioned blunt protrusion may be raised upward, or a rotation prevention projection may be fixedly joined to a fixing groove formed in the above-mentioned blunt protrusion, and a rotation prevention groove may be formed in the above-mentioned flange portion so that the rotation prevention projection is concavely recessed upward and the rotation prevention projection is male and female joined.

[0023] In addition, an inner jaw portion is formed on the inside of the outer cover to support the anti-fall cap, and the inner jaw portion may have an inclined surface.

[0024] In addition, a screw portion that is fixedly coupled to the fixture may be formed in the lower part of the base, and a coupling groove that couples the driver groove and the screw portion of the anti-fall cap may be formed in the upper part.

[0025] Additionally, the adhesive can fill a gap between the crown and the outer cover caused by air gap errors.

[0026] In addition, the present invention according to another embodiment for achieving the above-mentioned purpose provides a dental implant system including a dental abutment having the above-mentioned triple structure.

[0027] As described above, according to the dental implant system according to an embodiment of the present invention, by having an abutment having a triple structure including a base, an elastic body, and an outer cover, the occlusal force repeatedly applied to the crown during the mastication process can be absorbed, thereby providing a natural look like a natural tooth and preventing breakage of the abutment or fixture.

[0028] In addition, according to a dental implant system according to an embodiment of the present invention, in an abutment structure having a triple structure including a base, an elastic body, and an outer cover, when attaching a crown to the outer cover of the abutment, an adhesive is used so that the space where the adhesive enters stably absorbs errors (gaps) during the porous process (fills in gaps caused by steps), thereby preventing point contact or line contact from occurring at a specific area, thereby preventing stress from being concentrated locally during mastication.

[0029] In addition, according to a dental implant system according to an embodiment of the present invention, in an abutment structure having a triple structure including a base, an elastic body, and an outer cover, a vertical cutting surface is formed on the side of the outer cover, and a rotation prevention protrusion is formed on the blunt jaw portion, thereby accurately connecting the crown to a desired position while preventing rotation of the crown.

[0030] Fig. 1 is a cross-sectional view showing a dental abutment according to an embodiment of the present invention.

[0031] Fig. 2 is a cross-sectional view showing the dental abutment shown in Fig. 1 separately by configuration.

[0032] Figure 3 is a cross-sectional view showing a dental implant system according to an embodiment of the present invention.

[0033] Fig. 4 is a cross-sectional view showing the dental implant system shown in Fig. 3 separated by component.

[0034] Fig. 5 is a cross-sectional view showing an outer cover according to another example of the present invention.

[0035] Fig. 6 is a cross-sectional view showing a drop-off prevention cap according to another example of the present invention.

[0036] Fig. 7 is a cross-sectional view showing an outer cover according to another example of the present invention.

[0037] Fig. 8 is a cross-sectional view showing a base according to another example of the present invention.

[0038] Fig. 9 is a cross-sectional view showing a base according to another example of the present invention.

[0039] Fig. 10 is a cross-sectional view showing a base according to another example of the present invention.

[0040] Hereinafter, the advantages and features of the present invention and the methods for achieving them will be clarified with reference to the embodiments described in detail below together with the accompanying drawings. In addition, the same reference numerals refer to the same components throughout this specification. In addition, each component illustrated in each drawing may be excessively illustrated in size and shape, but this is for the convenience of explanation and is not intended to be limiting. In addition, when it is described as 'A and / or B', it can mean both A and B, or either A or B.

[0041] FIG. 1 is a cross-sectional view schematically showing a dental abutment according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the dental abutment shown in FIG. 1 separately by component.

[0042] Referring to FIGS. 1 and 2, a dental abutment (10) according to an embodiment of the present invention may be formed of a triple structure including a base (11), an elastic body (12), and an outer cover (13).

[0043] Fig. 3 is a schematic cross-sectional view of a dental implant system to which the dental abutment shown in Fig. 1 is applied, and Fig. 4 is an exploded cross-sectional view of the dental implant system shown in Fig. 3.

[0044] Referring to FIGS. 1 to 4, a base (11) is formed with a hollow space (11a) into which an abutment screw (2) is inserted to secure a dental abutment (10) to a fixture (1) implanted in the alveolar bone.

[0045] The base (11) includes a lower part (111) that is joined to the fixture (1) according to the position and role at which it is formed, and an upper part (112) that is formed on the upper part of the lower part (111) and supports the crown (4). A blunt protrusion (113) is formed at the boundary between the lower part (111) and the upper part (112).

[0046] The lower part (111) may have a lower portion inserted into the interior of the fixture (1). The remaining portion of the lower part (111) that is not inserted into the fixture (1) may have a structure in which the diameter increases as it goes upward, and this portion may be covered by the gums after the dental implant procedure. The upper part (112) may have a structure in which the diameter decreases as it goes upward.

[0047] A groove (not shown) of a predetermined depth may be formed on the outer surface of the upper part (112) covered by the elastic body (12) so that at least a portion of the elastic body (12) may be inserted and received to prevent the elastic body (12) from falling off from the upper part (112). At this time, the groove may be a circumferential groove formed along the circumference of the upper part (112) or a cutting groove formed at a specific portion.

[0048] When using a base with a separate abutment screw (2), the elastic body (12) can be installed to surround the outer surface of the upper part (112) of the base (11) and the outer surface of the head (22) of the abutment screw (2), as shown in Fig. 1. Preferably, the lower part covers the blunt protrusion (113) and the upper part is installed to surround the upper part (112) of the base (11), and is installed to protrude above the upper part (112) and surround the head (22) of the abutment screw (2). At this time, the elastic body (12) can be formed as an integral structure in which the portion covering the outer surface of the upper part (112) of the base (11) and the portion covering the outer surface of the head (22) of the abutment screw (2) protruding above the upper part (112) of the base (11) are integrally formed, or as a separate structure in which they are separated from each other.

[0049] A groove (not shown) of a predetermined depth may be formed on the outer surface of the head (22) of the abutment screw (2) protruding above the upper part (112) covered by the elastic body (12) to accommodate at least a portion of the elastic body (12) in order to prevent the elastic body (12) from falling off from the head (22) of the abutment screw (2). At this time, the groove may be a circumferential groove formed along the circumference of the head (22) of the abutment screw (2) or a cutting groove formed at a specific portion.

[0050] This elastic body (12) may be made of an elastic material to absorb and cushion the shock transmitted from the crown (4) to the base (11) through the outer cover (13) due to occlusal force. For example, the elastic body (12) may be formed of a silicone material, a synthetic rubber material such as fluoroelastomer, a metal material in the form of a fabric having elasticity (for example, a fabric or membrane woven from thin nitinol wire (Ni-Ti wire) made of a Ni-Ti alloy), or a synthetic resin material.

[0051] The outer cover (13) is installed on the upper part of the elastic body (12) installed to cover the upper part (112) of the base (11), as shown in Fig. 1. This outer cover (13) may be made of the same material as the base (11). For example, the outer cover (13) and the base (11) may be made of a hard metal material. In addition, as shown in Figs. 3 and 4, an inner jaw portion (131) is formed in a belt shape on the upper inner circumference of the outer cover (13), which is supported downward by an outer jaw portion (32b) formed on the head portion (32) of a fall-prevention cap (3) to prevent the outer cover (13) from falling off.

[0052] Figures 3 and 4 show that the abutment screw (2) that fixes the base (11) to the fixture (1) is separated from the base. The base (11) is fixed to the fixture (1) by the abutment screw (2) with the lower part (111) inserted into the interior of the joint groove (1a) of the fixture (1).

[0053] The abutment screw (2) is manufactured separately from the dental abutment (10), and includes a screw portion (21) that penetrates the hollow portion (11a) of the base (11) and is screw-connected to the inner surface of the joining groove (1a) of the fixture (1), and a head portion (22) formed on the upper portion of the screw portion (21) with a larger diameter than the screw portion (21). As shown in FIGS. 3 and 4, an outer jaw portion (22a) that is hooked downward to the upper portion of the upper part (112) of the base (11) is formed on the upper portion of the head portion (22). The head of the abutment screw (2) protruding above the upper part (112) of the base (11) also performs a post function like the upper part (112) of the base (11), and an elastic body (12) is also surrounded around the periphery of the head of the abutment screw (2).

[0054] As shown in FIGS. 3 and 4, the head (22) has a driver groove (22b) formed in the upper center thereof, into which a driver tool (not shown) is coupled to screw the abutment screw (2) to the fixture (1). In addition, a coupling groove (22c) is formed on the upper side of the driver groove (22b) so as to communicate with the driver groove (22b), and the screw portion (31) of the anti-fall cap (3) is screwed into this groove.

[0055] The crown (4) is attached to the outer cover (13) using an adhesive. An occlusal hole (4b) that serves as a passage for the anti-falling cap (3) may be created on the occlusal surface of the crown (4), or the anti-falling cap (3) may be fixed and secured using an adhesive without creating an occlusal hole (4b).

[0056] The anti-fall cap (3) is screwed into a connecting groove (22c) formed in the head (22) of the abutment screw (2) by a screw portion (31), and the head portion (32) is supported downward by being hooked on an inner jaw portion (131) formed on the inside of the outer cover (13), as shown in Fig. 3. In addition, a driver groove (32a) is formed in the center of the head portion (32) of the anti-fall cap (3) to tighten or loosen the anti-fall cap (3).

[0057] The crown (4) is attached to the outer cover (13) by an adhesive. By completely filling the space between the outer cover (13) and the crown (4) with the adhesive, point contact or line contact is prevented from occurring at a specific area due to air gap errors, thereby fundamentally preventing local stress concentration when occlusal force is applied.

[0058] FIG. 5 is a cross-sectional view schematically showing an outer cover according to another example of the present invention, and FIG. 6 is a cross-sectional view schematically showing a drop-off prevention cap according to another example of the present invention.

[0059] Referring to FIGS. 5 and 6, an outer cover (53) according to another example of the present invention is formed so that the inner jaw portion (531) has an inclined surface corresponding to the side surface (inclined surface) of the head portion (52) of the anti-fall cap (5). Other than that, it can be formed in the same manner as the outer cover (13) shown in FIGS. 1 and 2.

[0060] FIG. 7 is a cross-sectional view schematically showing an outer cover according to another example of the present invention, and (b) of FIG. 7 is a cross-sectional view cut in a 90° direction from the cutting direction of (a).

[0061] Referring to Fig. 7, an outer cover (63) according to another example of the present invention is installed so as to cover a portion of a blunt protrusion (113, see Fig. 2) by forming a flange portion (631) with a lower portion that is horizontally bent. The flange portion (631) may be formed in a band shape along the lower perimeter of the outer cover (63).

[0062] As shown in (b) of Fig. 7, a cut surface (632) may be formed on the outer surface of the outer cover (63) to precisely align the crown (4) to the outer cover (63) when the crown (4) is bonded to the outer cover (63) using an adhesive. A cut surface (not shown) is also formed on the inner surface of the receiving hole (4a) of the crown (4) corresponding to the cut surface (632). At this time, the cut surface (632) may be a vertical surface.

[0063] In addition, as shown in (b) of Fig. 7, an anti-rotation groove (632) that is concavely sunken upward may be further formed in the center of the flange portion (631). The anti-rotation groove (632) has a shape corresponding to the shape of the anti-rotation protrusions (711, 82, see Figs. 8 and 9) that are male and female and are coupled therein. The anti-rotation groove (632) is coupled with an anti-rotation protrusion (711, 82) that is raised upward from the protrusion (113) to prevent the outer cover (63) from rotating about the base (11) as an axis.

[0064] Figure 8 is a cross-sectional view schematically showing a base according to another example of the present invention.

[0065] Referring to Fig. 8, a base (71) according to another example of the present invention includes a rotation prevention projection (711) raised from a blunt protrusion. The rotation prevention projection (711) is inserted into the rotation prevention groove (633) shown in Fig. 7 (b) and is coupled to the male and female sides. Accordingly, the outer cover (63) is prevented from rotating about the base (71) as an axis. At this time, one or more rotation prevention projections (711) may be formed on the blunt protrusion, and may be formed in various shapes such as a hemisphere or a half-angle. That is, the shape and number of the rotation prevention projections (711) are not particularly limited.

[0066] As shown in FIGS. 7 and 8, the elastic body installed between the protrusion of the base (71) and the flange portion (631) of the outer cover (63) is formed with a thin thickness. Accordingly, in the protrusion portion of the base (71) where the rotation prevention projection (711) is formed, the elastic body is raised upwards in correspondence to the thickness of the rotation prevention projection (711), and the raised portion of the elastic body can also be inserted into and joined to the rotation prevention groove (633) of the outer cover (63). In addition, a through hole (not shown) can be additionally formed in the elastic body interposed between the protrusion of the base (71) and the outer cover (63) to correspond to the rotation prevention groove (633) and the rotation prevention projection (711). Through this, interference can be prevented when the rotation prevention projection (711) is inserted into the rotation prevention groove (633) formed in the outer cover (63).

[0067] Figure 9 is a cross-sectional view schematically showing a base according to another example of the present invention.

[0068] Referring to FIG. 9, a base (81) according to another example of the present invention has a fixing groove (81a) formed that extends from the upper surface of the protrusion (813) to the upper portion of the lower part (811), unlike the outer cover (71) shown in FIG. 8. In addition, a rotation prevention projection (82) that prevents rotation of the outer cover (63) is fixed to this fixing groove (81a). A portion of the rotation prevention projection (82) protrudes upward from the protrusion (813) while fixed to the fixing groove (81a) and is inserted into the rotation prevention groove (632) formed in the outer cover (63) that covers the protrusion (813). At this time, the rotation prevention projection (82) can be coupled to the fixing groove (81a) by a force-fit method or a screw-joining method. The fixed groove (81a) may be configured to have an inner diameter that becomes smaller as it goes deeper to facilitate insertion of the rotation prevention projection (82), and the rotation prevention projection (82) may also have a diameter that becomes smaller as it goes deeper into the fixed groove (81a).

[0069] Figure 10 is a cross-sectional view schematically showing a base according to another example of the present invention.

[0070] Referring to FIG. 10, a base (91) according to another example of the present invention is formed with an abutment screw integral structure in which a screw portion (911a) is integrally formed at the lower part of the lower part (911) and is directly screw-connected to the fixture (1), unlike the base (11) shown in FIGS. 1 and 2.

[0071] In this integral structure, the abutment screw (2) shown in FIGS. 3 and 4 is not additionally required.

[0072] A driver groove (912a) is formed in the center of the upper part (912) of the base (91), and a joining groove (912b) is formed on the upper side thereof to which the screw portion (31) of the anti-fall cap (3) is screwed.

[0073] While preferred embodiments of the present invention have been described and illustrated using specific terms, such terms are solely intended to clarify the invention. It should be understood that various modifications and variations may be made to the embodiments and terms described herein without departing from the spirit and scope of the appended claims. Such modified embodiments should not be construed as separate from the spirit and scope of the present invention, but should be considered to fall within the scope of the appended claims.

[0074] [Explanation of symbols]

[0075] 1: Fixture

[0076] 1a: Combination home

[0077] 2: Abutment screw

[0078] 3, 5: Anti-fall cap

[0079] 4: Crown

[0080] 4a: Reception Hall

[0081] 4b: Occlusal hole

[0082] 10: Dental abutment

[0083] 11, 71, 81, 91: Bass

[0084] 11a: Hollow

[0085] 12: Elastic body

[0086] 13, 53, 63: Outer cover

[0087] 21, 51: Screw

[0088] 22, 52: Head

[0089] 22a: Outer jaw

[0090] 22b: Driver Home

[0091] 22c: Combination home

[0092] 31: Screw

[0093] 32: Head

[0094] 32a: Driver Home

[0095] 32b: Outer jaw area

[0096] 81a: Fixed home

[0097] 111, 811, 911: Subparts

[0098] 112: Upper part

[0099] 113, 813: Blunt

[0100] 131, 531: Medial jaw

[0101] 631: Flange section

[0102] 632: Cross-section

[0103] 633: Anti-rotation groove

[0104] 82, 711: Anti-rotation protrusion

[0105] 911a: Screw

Claims

1. A base that is connected to a fixture implanted in the alveolar bone; An elastic body installed to surround the outer surface of the base; and It is composed of a triple structure including an outer cover installed to wrap the outer surface of the elastic body; The outer cover further includes a fall-off prevention cap that prevents the outer cover from falling off from the base. A crown is attached to the outer surface of the outer cover using an adhesive. Dental abutment with a triple structure 2. In paragraph 1, The above base is, A lower part coupled to the above fixture; An upper part formed on the upper part of the lower part and covered by the elastic body; and A bluff formed at the boundary between the lower part and the upper part; A dental abutment having a triple structure including:

3. In paragraph 2, A dental abutment having a triple structure in which a circumferential groove or cutting groove for accommodating a portion of the elastic body is formed on the side of the upper part.

4. In paragraph 2, The above base is fixed to the fixture through an abutment screw inserted into the hollow, The elastic body is installed to cover the outer surface of the upper part and the outer surface of the head of the abutment screw protruding upward from the upper part. Dental abutment with a triple structure.

5. In paragraph 4, A dental abutment having a triple structure in which the elastic body is formed as an integral part or a separate structure in which a portion covering the outer surface of the upper part and a portion covering the outer surface of the head of the abutment screw protruding from the upper part are formed as an integral part.

6. In paragraph 4, The above abutment screw, A screw portion fixedly coupled to the above fixture; and A head formed on the upper part of the screw portion, a portion of which protrudes upwardly from the base, and the portion protruding upwardly from the base is supported downwardly by being hooked to the upper part of the base; A dental abutment having a triple structure including:

7. In paragraph 4, A dental abutment having a triple structure in which a circumferential groove or cutting groove for accommodating a portion of the elastic body is formed on the outer surface of the head of the abutment screw.

8. In paragraph 4, A dental abutment having a triple structure in which the head of the abutment screw has a driver groove formed in the center, and a joining groove formed on the upper portion of the driver groove to which the screw portion of the anti-fall cap is joined.

9. In paragraph 1, A dental abutment having a triple structure in which the elastic body is selected from among a silicone material, a synthetic rubber material such as fluoroelastomer, a metal material in the form of elastic fabric, or a synthetic resin material.

10. In paragraph 2, A dental abutment having a triple structure in which a flange portion is formed on the lower part of the outer cover to cover the blunt jaw.

11. In paragraph 10, A dental abutment having a triple structure in which the above-mentioned blunt jaw is raised upward or a rotation prevention projection is fixedly joined to a fixing groove formed in the above-mentioned blunt jaw, and the above-mentioned flange portion is formed with a rotation prevention groove that is concave upward and into which the rotation prevention projection is male and female.

12. In paragraph 1, A dental abutment having an inner jaw portion formed on the inner side of the outer cover to support the anti-falling cap, and having a triple structure with an inclined surface.

13. In paragraph 1, A dental abutment having a triple structure in which a screw portion for fixing and joining to the fixture is formed in the lower part of the base, and a coupling groove for joining a driver groove and a screw portion of the anti-fall cap is formed in the upper part.

14. In paragraph 1, The above adhesive is a dental abutment having a triple structure that fills the gap between the crown and the outer cover caused by pore error.

15. A dental implant system comprising a dental abutment having a triple structure according to any one of claims 1 to 14.

Images