Abutment Assembly

Abstract

One embodiment of the present invention provides an abutment assembly including a lower connecting portion having a first through-hole extending vertically in the center, a first rotation prevention portion formed at the upper part so as to prevent rotation relative to the crown, and a second rotation prevention portion formed at the lower part so as to prevent rotation relative to the abutment, and an upper connecting portion having a third through-hole extending vertically in the center, which is inserted into the through-hole of the crown and connected to the lower connecting portion.

Claims

[Claim 1] A lower connecting portion is formed in which a first through-hole extending vertically is formed in the center, a first rotation prevention portion is formed at the upper part which is connected to the crown to prevent relative rotation, and a second rotation prevention portion is formed at the lower part which is connected to the abutment to prevent relative rotation. An abutment assembly comprising: an upper connecting portion having a third through-hole extending vertically in the center, which is inserted into the through-hole of the crown and coupled to the lower connecting portion. [Claim 2] The abutment assembly according to claim 1, further comprising a crown having a second through-hole extending vertically in the center, and a lower groove formed at the lower part of the second through-hole into which the first rotation prevention portion of the lower connecting portion is inserted and joined. [Claim 3] The lower groove of the crown includes a circular coupling surface to which the first anti-rotation portion is coupled, and the coupling surface has one or more flat portions formed perpendicular to the radial direction of the lower groove. The abutment assembly according to claim 2, wherein the first anti-rotation portion includes one or more anti-rotation surfaces that are cut and formed in correspondence with the flat portion. [Claim 4] The lower groove of the crown includes a circular coupling surface to which the first anti-rotation portion is coupled, and a recess is formed in the coupling surface. The abutment assembly according to claim 2, wherein the first anti-rotation portion includes a projection corresponding to the recess. [Claim 5] The second through-hole of the crown is provided with a stepped portion. The aforementioned upper connecting portion is A support portion that is locked and supported by the stepped portion of the crown, Includes a lower connecting portion that extends from the lower part of the support portion and is connected to the first through-hole of the lower connecting portion, The abutment assembly according to claim 2. [Claim 6] The lower joint portion includes a joint piece that is separated by an incision groove and is elastically deformable in the radial direction, A locking projection is formed on the outer surface of the connecting piece. The first through-hole of the lower connecting portion is formed with an inner vertical portion having a constant inner diameter and a boring portion provided below the inner vertical portion, to which the locking projection is connected. The abutment assembly according to claim 5, wherein the connecting piece passes through the inner vertical portion and contracts radially inward, and expands radially outward from the boring portion to be elastically bonded to the inner circumferential surface of the first through hole. [Claim 7] The lower connecting portion is formed with a circular cross-section. The abutment assembly according to claim 5, wherein the lower connecting portion is press-fitted into the first through-hole of the lower connecting portion, and its outer circumferential surface is in close contact with the inner circumferential surface of the first through-hole. [Claim 8] The abutment assembly according to claim 1, further comprising an abutment having a second internal threaded portion in the center and a second internal groove formed therein into which the second anti-rotation portion is coupled. [Claim 9] The cross-section of the second anti-rotation part is formed in a polygonal shape. The abutment assembly according to claim 8, wherein the second internal groove includes a polygonal portion corresponding to the second anti-rotation portion. [Claim 10] The abutment assembly according to claim 8, further comprising a screw supported on the upper surface of the upper connecting portion and having an outer circumferential threaded portion formed at its lower end for fastening to the second inner circumferential threaded portion of the abutment. [Claim 11] The abutment assembly according to claim 10, wherein the first through hole of the lower connecting portion is provided with a third inner threaded portion into which the outer threaded portion of the screw is fastened. [Claim 12] An implant that is placed in the alveolar bone and has a first internal groove on which a first inner circumferential threaded portion is formed, An abutment is formed in which a second internal groove is provided in the center, and which is inserted into the first internal groove and fastened to the first internal groove, A crown having a second through-hole extending vertically in the center, and a lower groove provided below the second through-hole, A lower connecting portion is formed in which a first through hole extending vertically is formed in the center, a first rotation prevention portion is formed at the upper part which is coupled to the lower groove of the crown in such a way as to prevent relative rotation, and a second rotation prevention portion is formed at the lower part which is coupled to the second internal groove of the abutment in such a way as to prevent relative rotation. An abutment assembly comprising: an upper connecting portion having a third through-hole extending vertically in the center, which is inserted into the second through-hole of the crown and coupled to the lower connecting portion.

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