KR101881421B1 - Abutment assembly - Google Patents

Abstract

The present invention provides an abutment assembly, comprising: a fixture fixatedly buried in alveolar bone and provided with an inner circumferential thread part; a base abutment provided with a lower end thread part engaged with the inner circumferential thread part of the fixture and forming an inner circumferential thread part at a lower part of a central hole; an upper abutment inserted into and coupled to a polygonal recess formed at an upper part of the central hole of the base abutment; a prosthesis forming a lead-in hole through which an upper post part of the upper abutment is inserted from a lower part and coupled; and a first screw inserted into the lead-in hole of the prosthesis from an upper part and coupled, and passing through the upper abutment to be coupled to the inner circumferential thread part of the base abutment, wherein a healing cap or a scan body can be coupled to the base abutment. The present invention is able to selectively couple the healing cap, the scan body, the upper abutment and the prosthesis after coupling the base abutment to the fixture, thereby easily realizing the implant procedure.

Description

Abutment assembly < RTI ID = 0.0 >

The present invention relates to abutment assemblies.

Implant refers to a replacement that restores when the original body tissue is lost, but implants are implanted with artificial teeth. It is a procedure to restore the function of the tooth by replacing the missing tooth root with a tooth root made of titanium which has no rejection reaction to the human body.

The normal prosthesis or denture will be damaged in the surrounding teeth and bones over time, but the implant will not injure the surrounding tooth structure, and it has the advantage that it can be used semi-permanently because it has the same function and shape as the natural teeth and does not have cavities.

In addition, implants improve the function of dentures in patients with single missing teeth restoration, as well as in partial and total toothless patients, and improve the esthetic aspects of dental prosthesis restoration. Furthermore, it helps disperse the excessive stress applied to the surrounding supporting bone tissue and stabilizes the dentition.

The dental implants are divided into a gingival bone, namely, a surgical procedure for implanting an implant on an alveolar bone, and a prosthetic procedure for attaching an artificial tooth by connecting an abutment to an implanted implant.

There are a variety of surgical procedures for such implants. A brief description of an example is given below.

First, a groove corresponding to a fixture dimension is formed through drilling and tapping, and a mount is fastened to the top of the fixture. Then, using a surgical handpiece, the fixture and the mount are inserted into the alveolar bone, and then the mount is removed from the fixture, so that the fixture is inserted into the alveolar bone. The first operation is completed by fastening the cover screw to the upper part of the fixture to seal the fixture.

The cover screw prevents bacteria and foreign substances present in the mouth from intruding into the fixture while waiting for the fixture's osseointegration. The duration of ossification is somewhat different depending on the patient's bone quality and implantation position, but usually takes 3 to 6 months.

Next, the gums are opened through the second operation to expose the cover screws, check the degree of fusion of the fixtures, and remove the cover screws. And a healing abutment is fastened to the top of the fixture for aesthetic gingival formation and waited for two to three weeks. In order to improve the complexity of such a second procedure, a first-aid procedure for fastening a healing abutment is often used, omitting the process of fastening and removing the cover screw.

Next, after confirming the esthetic gingival formation, the healing abutment is removed, and the impression coping is fastened on the fixture for the preparation of the prosthesis. The impression material is then used to create a preliminary impression in the mouth and remove the impression coping.

Then, a tooth model is prepared, an artificial tooth is pierced, an abutment is fastened to the upper part of the fixture, and the prosthesis, that is, the artificial tooth is fixed to the abdomen to complete the artificial tooth.

However, there is a cement bonding method and a screw fastening method in which abutment which is an artificial tooth is combined with abutment.

In the case of the cement bonding method, there is a problem that the abutment and the prosthesis can not be separated when post-correction is required.

Patent Document 1 (Japanese Patent Registration No. 10-1768410) discloses an example of an abutment (locking link) which is engaged with a prosthesis by a screw fastening method.

The disclosed prior art locking link is configured to be secured by interference fit when inserting a fitting into the prosthesis. To this end, the coupling portion of the locking link interposed in the prosthesis is formed so as to extend from the lower end to the upper end, and a plurality of vertical incision grooves are formed and transverse grooves are formed on the outer circumferential surface.

However, in the conventional locking link, there is a problem that it is difficult to insert the coupling portion by inserting the extended top when inserting the coupling portion into the prosthesis. In addition, there is a possibility that the groove portion of the engaging portion is plastically deformed or broken in the process of making the engaging portion constricted to the prosthesis. In addition, since the coupling portion is coupled to the prosthesis in a state elastically deformed by the interference fit, stress is applied to the coupling portion continuously, so that the possibility that the coupling portion deforms or breaks with time increases.

On the other hand, in Patent Document 2 (Japanese Patent Registration No. 10-1417980), there is disclosed a polygonal protrusion formed on an end portion, a body portion larger than the protrusion portion formed on the protrusion portion, and a scan body having a sloped connection portion connecting the protrusion portion and the body portion. Wow; A fixture formed at a lower portion of the polygonal groove and formed with a threaded portion at an inner surface thereof and fixed to the alveolar bone; And a fixing screw passing through the through hole of the scan body and having a screw portion of the lower end portion fastened to the screw portion of the fixture and a head formed larger than the screw portion and fixing the scan body to the fixture, .

The scan body of Patent Document 2 not only functions as a reference body for acquiring a three-dimensional image in the oral cavity during the oral scan without coupling a separate scan adapter in a state of being coupled to a fixture, and can form an emmersion profile at the time of gingival healing It can also function as a healing abutment.

However, in the case of Patent Document 2, when the designed prosthesis is combined using the image obtained in the scanning process, the scan body is removed from the fixture and the prosthesis is coupled to the fixture using a separate abutment. Therefore, since the abutment for combining the scan body and the prosthesis is separately prepared and assembled, it is not only inefficient, but also has a complicated procedure, which is burdensome to the patient and the doctor.

Korean Patent Registration No. 10-1768410 Korean Patent Registration No. 10-1417980

The present invention is capable of interchangeably (optionally) coupling a healing cap, scan body, or upper abutment and prosthesis to the base abutment after fastening the base abutment to the fixture, And it is an object of the present invention to provide an abutment assembly which can be achieved remarkably easily.

According to an aspect of the present invention, there is provided an abutment assembly comprising: a fixture fixedly embedded in an alveolar bone and having an inner circumferential surface threaded portion; A base abutment provided with a lower end threaded portion to be fastened to an inner circumferential threaded portion of the fixture and an inner circumferential threaded portion formed at a lower portion of the center hole; An upper abutment inserted into the polygonal groove formed on the central hole of the base abutment and coupled thereto; A prosthesis in which a top post portion of the upper abutment is inserted into the lower portion and into which a receiving hole is formed; And a first screw inserted into the insertion hole of the prosthesis and coupled to the inner abutment of the base abutment through the upper abutment, wherein the base abutment is provided with a healing cap or scan body .

The upper outer circumferential surface of the base abutment may be formed as an inclined surface at a predetermined angle with a smaller outer diameter toward the upper end so that the lower end grooves of the prosthesis, the healing cap or the scan body are selectively seated.

The post portion of the upper abutment includes a plurality of cutting grooves formed vertically from the upper portion. The first screw has a tapered portion formed on the outer peripheral surface of the middle portion to expand the post portion when the post portion is inserted into the post portion, So as to be pressed onto the inner peripheral surface of the inlet hole.

Preferably, the healing cap includes a seating groove portion that is seated on the upper portion of the base abutment, and a shaft portion that extends from a central bottom surface and has a threaded portion formed at a lower end thereof.

The scan body includes a center hole penetrating vertically, a seating groove seated on an upper portion of the base abutment, and a mounting portion formed on an outer peripheral surface of a lower end extending portion of the center hole and inserted into a polygonal groove of the base abutment And the scan body is coupled to the base abutment by a second screw that passes through the center hole and is fastened to an inner circumferential screw portion of the base abutment.

The scan body may further include a vertical groove formed on the opposite side of the longitudinal milling surface formed on one side of the upper peripheral surface in order to provide a reference point for positional identification during oral scan.

The scan body may have a truncated cone shape, and a temporary prosthesis may be adhered to the outer surface of the scan body by cement.

According to the abutment assembly of the present invention described above, after the base abutment is fastened to the fixture, the healing cap, the scan body, or the upper abutment and the prosthesis are interchangeably (optionally) The implantation procedure can be achieved remarkably easily.

In the conventional case, a fixture is mounted on a fixture for fixture placement, and the fixture is mounted by rotating the mount. However, in the case of the present invention, since a fixture can be placed using a base abutment, no need.

It can also be used as a healing abutment by combining a healing cap on the base abutment, combining the scan body with the base abutment to create a digital image inside the mouth, and attaching the prosthesis to the scan body with cement The scan body can also be used as a cement adhesion abutment.

In other words, the base abutment combined with the healing cap replaces the role of the healing abutment, and the base abutment is incorporated early in the fixture to form the biological width early, making it an ideal environment for osseointegration. And the alveolar bone is formed early and has a much higher stability than the prior art.

After the scan, the scan body is separated and the prepared prosthesis can be easily attached to the base abutment using the upper abutment and the screw.

In addition, the upper outer circumferential surface of the base abutment is formed as a tapered inclined surface, and can sufficiently support the lateral pressure applied in the chewing motion in the mouth when the prosthesis is covered.

1 is an exploded cross-sectional view of an abutment assembly in accordance with an embodiment of the present invention.
2 is an end view of an abutment assembly in accordance with an embodiment of the present invention.
Fig. 3 is a view for fastening the base abutment to the fixture in Fig. 1;
Figures 4 and 5 show the coupling of the upper abutment to the prosthesis.
FIG. 5 is a view for fastening a prosthesis and an upper abutment to a base abutment fastened to a fixture with a screw.
6 is a view showing that the post portion of the upper abutment is extended by the tapered portion of the screw.
7 is an exploded cross-sectional view illustrating a base abutment and a healing abutment coupled to the fixture.
8 is a cross-sectional view showing a state in which a fixture, a base abutment, and a healing abutment are combined in Fig.
9 is an exploded cross-sectional view illustrating a base abutment and a scan body coupled to a fixture.
FIG. 10 is a cross-sectional view showing a state in which a fixture, a base abutment, and a scan body are combined in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded cross-sectional view of an abutment assembly according to one embodiment of the present invention, and FIG. 2 is an assembled cross-sectional view of an abutment assembly according to an embodiment of the present invention.

The abutment assembly of the present invention includes a fixture 100 embedded in and fixed to an alveolar bone, a base abutment 200 fastened and fixed to the fixture, an upper abutment 300 coupled to the base abutment, A prosthesis 400 coupled to the upper abutment, and a first screw 500 that passes through the prosthesis and the upper abutment and is coupled to the base abutment.

The fixture 100 may be an artificial root implanted into the alveolar bone. The fixture 100 may include a threaded portion 120 formed on an inner circumferential surface thereof and a threaded portion 140 formed on an outer circumferential surface thereof.

The lower end threaded portion 280 of the base abutment 200 is fastened to the inner circumferential threaded portion 120.

The outer circumferential surface thread portion 140 may be formed of a triangular screw so that the outer circumferential surface thread portion 140 can be inserted into the alveolar bone while being pierced. Alternatively, the outer circumferential surface thread portion 140 may be formed as a triangular screw.

Although the outer diameter of the fixture 100 is shown to be the same from the upper portion to the lower portion, the outer diameter of the portion of the fixture 100 gradually decreases from the upper portion to the lower portion.

The base abutment 200 has a lower end threaded portion 280 that is fastened to the inner surface threaded portion 120 of the fixture 100. An inner circumferential surface threaded portion 240 is formed at a lower portion of the center hole 210 formed from the upper surface to the lower surface. The lower end portion 560 of the first screw 500 is fastened to the inner circumferential screw portion 240 as described later.

A polygonal groove 220 is formed in the upper portion of the center hole 210 of the base abutment 200 so that the lower portion of the upper abutment 300 can be inserted and coupled. The polygonal groove 220 is formed to have an inner diameter larger than the inner diameter of the lower portion of the center hole 210 of the base abutment 200, so that the boundary portion with the lower portion is stepped. In addition, the lower end of the upper abutment 300 is formed of a hexagonal columnar shaped portion 380, and the polygonal groove 220 also has a hexagonal groove shape. Thus, the mounting portion 380 of the upper abutment 300 can be coupled so as not to rotate relative to the polygonal groove 220 of the base abutment 200. [ The polygonal groove 220 is not limited to a hexagonal groove, but may be formed as a square or octagonal groove. In this case, the mounting portion 380 may also be formed into a rectangular column or octagonal column shape corresponding to the shape of the polygonal groove 220.

On the other hand, a prosthesis 400 is seated and supported on the base abutment 200. The upper outer circumferential surface of the base abutment 200 is formed as an inclined surface having a smaller outer diameter toward the upper end so that the enlarged hole portion 480 of the prosthesis 400 described later and the seating groove portion 620 of the healing cap 600, Or the seating groove 740 of the scan body 700 may be selectively seated.

The outer circumference of the upper portion of the base abutment 200 may be inclined at an angle of about 5 to 45 degrees with respect to the center axis of rotation. That is, the upper outer circumferential surface of the base abutment 200 may have a truncated conical shape at a 5 to 45 degree angle. The inclined outer circumferential surface of the base abutment 200 is adapted to accommodate the lateral pressure applied when the prosthesis is applied to the oral cavity.

The base abutment 200 may further include a milling surface (not shown) formed in a plane cut at one side of the upper outer circumferential surface. This milling surface can prevent secondary rotation of the prosthesis 400 or the scan body 700 coupled to the base abutment 200 after the coupling.

It is preferable that a support step 230 is formed on the outer periphery of the intermediate portion of the base abutment 200 to stably support the lower end surface of the prosthesis 400. Although the support tab 230 is formed to be a horizontal plane, it may be formed to be an inclined plane.

A cuff portion 260 having an outer circumferential surface in contact with the gum is formed under the support tab 230 of the base abutment 200. The cuff portion 260 forms a contour extending downward from the outer periphery of the supporting jaw portion 230, and is a portion where a human's gums contact. Since the human gums have various shapes and sizes, the cuff portion 260 can be formed in various shapes.

Still, it is preferable that the outer circumferential surface of the cuff portion 260 is basically formed in an S-shaped curved surface shape so as to be advantageous in forming an emergence profile.

In the prosthesis that attaches artificial teeth to a fixture, it is necessary to reproduce the state of the oral cavity out of the mouth without any error so that the artificial tooth can be accurately formed in the laboratory. Reproducing the oral condition outside the mouth is called impression preparation.

When the outer circumferential surface of the cuff portion is formed so as to be bent linearly as in the cuff portion according to the prior art, an error may occur when the impression material is compressed and not the same as the inner shape of the patient's gum. On the other hand, since the outer circumferential surface of the cuff portion 260 of the present invention is formed of an elongated S-shaped curved surface, the impulse profile can be formed very accurately.

Further, since the base abutment 200 having the cuff portion 260 formed thereon is tightened immediately after the fixture 100 is inserted into the alveolar bone, it is necessary to tighten the cover screw or the healing abutment none. The cuff portion 260 of the base abutment 200 has a height that allows the connective tissue and the epithelial tissue to be bonded to the teeth in the teeth by the cuff portion 260 of the base abutment 200 Biological widths can occur from healing time, providing early biologic stability, providing an ideal environment for bone attachment, and preventing infection around the implant.

The upper abutment 300 is inserted and joined to the polygonal groove 220 formed on the center hole 210 of the base abutment 200. To this end, the outer peripheral surface of the lower end of the lower portion 360 of the base abutment 200 is formed in the shape of a hexagonal column to constitute a molding portion 380. The mounting portion 380 may be formed only on the outer peripheral surface of the lower half of the lower portion 360, not on the entire lower portion 360. That is, the outer peripheral surface of the upper half of the lower portion 360 may have a cylindrical shape, and the recessed portion 380 may be formed only on the lower half thereof.

The upper abutment 300 also includes an upper post 320 inserted into and engaged with the prosthesis 400 and a lower portion 320 extending laterally between the lower 360 and the post 320 to support the prosthesis And further includes an interruption blade portion 340 for interruption.

The post 320 is inserted into the lower hole 460 of the prosthesis 400 from below to upward. In the post portion 320, a plurality of cutting grooves 322 are formed vertically from the top. The cutout grooves 322 are spaced 90 degrees apart from each other at the post 320, but the number of the cutout grooves 322 is not limited to three, and may be three to six.

In addition, it is preferable that a circular slot 323 having a diameter larger than the width of the incision groove is formed at the lower end of the incision groove 322. The circular slot 323 may have a larger diameter than the width of the incision groove 322 and may be continuously formed at the lower end of the incision groove.

The cutout groove 322 allows the post portion 320 to be resiliently deformed, but stress can be concentrated particularly at the lower end of the cutout groove 322 when the post portion 320 is deformed. The circular slot 323 can disperse stress concentrated at the lower end of the incision groove 322 to prevent the periphery of the incision groove 322 from being broken.

The extended blade 340 extends laterally from the lower end of the post 320 to form a circular disk so that the lower surface of the post 320 supports the lower surface of the prosthesis 400. When the prosthesis 400 is pressed by the chewing motion, the extended blade 340 can firmly support the prosthesis 400.

The post portion 320 of the upper abutment 300 includes a plurality of protrusions 325 formed on the outer circumferential surface thereof and the inner circumferential surface of the prosthesis 400 has a plurality of support grooves 465).

The plurality of protrusions 325 may be disposed at the upper center of the outer surface of the side wall partitioned by the cutout groove 322 in the post 320.

The protrusion 325 may be triangular when viewed from the side. The distance between the outer ends of the pair of protrusions 325 facing each other is slightly larger than the inner diameter of the lower hole portion 460 of the prosthesis 400 described above. Therefore, when the post 320 is inserted into the lower hole 460, the upper portion of the post 320 may be elastically deformed to be slightly deformed.

 On the inner surface of the lower hole 460 of the prosthesis 400, a plurality of support grooves 465 are formed corresponding to the plurality of protrusions 325. When the post portion 320 is fully inserted into the lower hole portion 460, the plurality of protrusions 325 are inserted into the plurality of the support grooves 465 and the upper abutment 300 and the prosthesis 400 are inserted, Can be temporarily combined with each other.

The shape of the protrusion 325 may be a trapezoidal shape to a square shape, an arcuate shape to an elliptic arc shape, or a convex curved shape. At this time, the support groove 465 may have a groove shape corresponding to the shape of the protrusion 325.

Preferably, the thickness of the post 320 of the upper abutment 300 gradually decreases toward the upper side.

The post 320 is resiliently deformed by the tapered portion 550 of the first screw 500 to be pressed and fixed to the lower hole 460 of the prosthesis 400. Therefore, the post portion 320 is formed so that its thickness decreases gradually toward the top in consideration of the amount of deformation before and after expansion, so that the elastic deformation can be made easier and the fixing strength can be increased.

Meanwhile, a through hole 310 is formed in a central portion of the upper abutment 300 so that the first screw 500 can pass therethrough. A threaded portion 370 is formed on the inner circumferential surface of the through hole 310 at a predetermined height so that the lower end portion 560 of the first screw 500 can be temporarily fastened.

The prosthesis 400, which forms the external shape of the artificial tooth, is customized in a dental laboratory through a CAD (Computer Aided Design) or CAM (Computer Aided Manufacturing) system. The prosthesis 400 is preferably made of a zirconia material. An insertion hole 410 through which the upper abutment 300 is inserted from the lower side and the first screw 500 is inserted from the upper side is vertically formed in the center of the prosthesis 400.

The insertion hole 410 of the prosthesis 400 may include an upper end hole 420, a middle step 440, a lower hole 460, and an extension hole 480 at the lower end.

The head 520 of the first screw 500 may be inserted into the upper hole 420. 2, the upper hole 420 is formed to have a larger vertical length than that of the head 520 so that the head 520 is inserted into the upper hole 420 after the head 520 is completely inserted into the upper hole 420. [ In addition to the space above, the filling material can be filled.

The lower portion of the upper hole portion 420 may be formed as an inclined curved surface 430 having an inner diameter gradually decreasing toward the bottom. Correspondingly, the head 520 may also be formed as a curved surface whose outer diameter gradually decreases downward.

The stop part 440 is a part where the inner diameter is minimized between the upper hole part 420 and the lower hole part 460. The head part 520 is supported on the stop part 440, Below the upper abutment 300 may be supported so that it no longer climbs up.

The lower hole portion 460 is formed such that the post portion 320 of the upper abutment 300 is inserted and coupled from below and has an inner diameter equal to the lower end outer diameter of the post portion 320 . That is, when the post 320 is extended by the tapered portion 550 of the first screw 500, the post 320 may be formed to have a smaller outer diameter than the post 320, A lower hole portion 460 is formed so as to be pressed onto the lower hole portion 460.

The extended hole portion 480 is formed to extend downward from below the lower hole portion 460 and is extended to the upper edge portion 340 of the upper abutment 300 and the upper surface of the upper portion of the base abutment 200, . Thus, the upper portion of the extension hole portion 480 is stepped to correspond to the extended blade portion 340, and the lower portion thereof forms a concave curved surface that extends in the same shape as the upper outer surface of the base abutment 200. 2, the lower end surface of the prosthesis 400 is supported by the support chin 230 of the base abutment 200, and the lower end outer circumferential surface of the prosthesis 400 is supported by the above- Which is smoothly connected to the cuff portion 260 of the cuff 200.

As shown in FIG. 1, the first screw 500 may include an upper end head 520, an intermediate portion 540, and a lower end portion 560.

The head portion 520 may have a hexagonal groove formed therein so that a hexagonal wrench can be inserted and rotated. The outer circumferential surface of the head 520 may be formed as a curved surface whose outer diameter decreases gradually as it goes downward. A curved curved surface 130 may be formed at the lower portion of the upper hole 120 of the prosthesis 400 to support the head 520.

The side contour of the head 520 may be formed in an inclined linear shape. In other words, the side of the head 520 may be tapered at a predetermined angle.

Alternatively, the side contour of the head 520 may be curved downwardly. Particularly, it is preferable that the curved line has a curved surface shape in which the radius of curvature becomes smaller as it goes downward.

The intermediate portion 540 extends downward from the lower end of the head portion 520 and has a hollow cylindrical shape. The lower part of the intermediate part 540 is formed to have the same diameter, but the upper part of the intermediate part 540 is preferably formed of a tapered part 550 formed in a shape in which the diameter becomes smaller constantly as it goes down.

The tapered part 550 extends the post part 320 when the first screw 500 passes through the upper abutment 300 and is fastened to the fixture 100, And is pressed and fixed to the inner circumferential surface of the inlet hole 410. Thus, the tapered portion 550 opens the post portion 320 to be pressed and fixed to the inner circumferential surface of the lower hole portion 460 of the prosthesis 400.

The lower end portion 560 may have threads formed therein and may be fastened to the threaded portion 240 formed on the inner peripheral surface of the base abutment 200. The lower end portion 560 of the first screw 500 is engaged with the upper end portion of the abutment 300 in the assembling process as described later on the inner periphery of the upper abutment 300, And can be temporarily fastened to the threaded portion 370.

A healing cap 600 or a scan body 700 may be selectively coupled to the base abutment 200 as described later. That is, instead of coupling the upper abutment 300, the prosthesis 400, and the first screw 500, the healing cap 600 is fastened to the base abutment 200 coupled to the fixture 100 So that the gingival healing can be performed and the oral scan can be performed by fastening the scan body 700 to the base abutment 200. [

Next, a method for assembling an abutment assembly according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. The components of the abutment assembly may be a fixture, a base abutment, an upper abutment, a prosthesis, or a screw as described above.

First, a hole is drilled in the alveolar bone and the fixture 100 is placed. At this time, the fixture 100 is inserted halfway into the alveolar bone hole with a machine driver, and the lower end threaded portion 280 of the base abutment 200 is fastened to the inner circumferential screw portion 120 of the fixture 100, The fixture 100 can be completely placed in the alveolar bone hole by using a wrench corresponding to the polygonal groove 220 of the base abutment 200. [ As described above, the base abutment 200 can serve as a fixture mounting member that is conventionally provided separately when the fixture 100 is placed on the alveolar bone.

After the fixture 100 is inserted, it is necessary to confirm whether the fixture 100 is placed at the correct position and at the correct depth and angle with the alveolar bone. Since the upper portion of the base abutment 200 is exposed to the outside of the gum, the base abutment 200 can be visually observed to confirm that the fixture 100 is properly inserted.

3 shows that the fixture 100 is first fully inserted into the alveolar bone and then the base abutment 200 is fastened to the alveolar bone. However, in the process of placing the fixture 100 as described above, the base abutment 200 The fixture 100 can be placed and the defect of the placement can be checked.

In the conventional case, the fixture is attached to the fixture for fixture placement and the fixture is rotated by rotating the mount. However, in the present invention, since the base abutment is used for fixing the fixture, there is no need to attach a separate mount.

Next, as shown in FIG. 4, the post portion 320 of the upper abutment 300 is inserted into the lower hole portion 460 of the prosthesis 400 from below to above. When the post 320 is inserted into the lower hole 460, the outermost end of the protrusion 325 is pushed by the lower hole 460 to elastically contract the upper portion of the post 320, The upper abutment 300 and the prosthesis 400 can be temporarily engaged with each other.

5, the first screw 500 is inserted into the insertion hole 410 of the prosthesis 400 from top to bottom and rotated by a hexagonal wrench so that the lower screw portion 560 is inserted into the upper hole Temporarily fastened to the inner circumferential surface threaded portion 370 of the butt 300.

Next, the prosthesis 400 and the upper abutment 300 coupled to each other are placed on the base abutment 200, and the first screw 500 is further rotated by the wrench so that the lower end screw portion 560 is rotated, To the inner circumferential surface thread portion 240 of the base abutment 200.

6, when the lower end thread portion 560 of the first screw 500 starts to be fastened to the inner circumferential thread portion 240 of the base abutment 200, the taper of the first screw 500 The portion 550 extends the post 320 of the upper abutment 300.

When the first screw 500 is then rotated, the lower end portion 560 is pressed against the inclined curved surface 430 of the prosthesis 400 until the head 520 is pressed against the inner circumferential surface thread portion of the base abutment 200 240). At this time, the tapered portion 550 compresses the post portion 320 to the lower hole portion 460 of the prosthesis 400 so that the post portion 320 is completely in contact with the lower portion.

2, the base abutment 200 is firmly coupled to the fixture 100, and the first screw 500 is fixed to the fixture 400 and the upper abutment (not shown) 300 can be firmly coupled to the base abutment 200.

Next, the healing cap assembling structure will be described with reference to Figs. 7 and 8. Fig.

The healing cap 600 includes a seating groove portion 620 that is seated on the base abutment 200 and a shaft portion 640 that extends from the center bottom and has a threaded portion 660 formed at a lower end thereof.

The seating groove portion 620 has a shape corresponding to the upper outer shape of the base abutment 200 and the lower end outer peripheral surface of the healing cap 600 is softened to the cuff portion 260 of the base abutment 200 Thereby forming a connected curved surface.

The shaft portion 640 extends downward from the center of the seating groove portion 620 and is inserted into the center hole 210 of the base abutment 200. A screw portion 660 is formed at the lower end of the shaft portion 640 and is fastened to the inner circumferential surface thread portion 240 of the base abutment 200.

The shaft portion 640 of the healing cap 600 is formed in a cylindrical shape and a hexagonal recessed portion corresponding to the polygonal groove 220 of the base abutment 200 is not formed around the shaft portion 640. Accordingly, when the healing cap 600 is rotated to fasten the base abutment 200, the healing cap 600 can be freely rotated.

Although not shown, a hexagonal groove or the like that can be rotated by a hexagonal wrench or the like may be formed in the center of the upper surface of the healing cap 600. [ That is, the healing cap 600 can be disassembled or assembled by turning it by hand or by rotating it with a separate wrench or a screwdriver.

The healing cap 600 and the base abutment 200 are assembled by bonding the healing cap 600 to the fixture 100 fixed to the alveolar bone via the base abutment 200, ) Can function as a healing abutment.

Next, the scan body assembly structure will be described with reference to Figs. 9 and 10. Fig.

The scan body 700 includes a center hole 710 formed vertically through the center hole 710 and a seating groove 740 that is seated on the base abutment 200. The center hole 740 is formed on the outer peripheral surface of the lower end of the center hole, And a placing portion 760 inserted into the polygonal groove 220 of the abutment.

The center hole 710 is vertically formed at the center of the body of the scan body 700. The upper hole portion 720 of the center hole 710 is formed in the same shape as the head portion 820 of the second screw 800 to be described later and supports the inserted head portion 820. For this purpose, the inner circumferential surface of the upper hole portion 720 can form an inclined curved surface 730 whose diameter gradually decreases toward the bottom.

The side wall constituting the lower portion of the center hole 710 is formed to extend downward from the periphery of the center hole 710. The extension is inserted in the upper part of the center hole 210 of the base abutment 200.

The seating groove 740 is formed at an upper portion of the lower surface of the scan body 700 around an extension of the center hole 710. The lower end peripheral surface of the scan body 700 is also smoothly connected to the cuff portion 260 of the base abutment 200. The upper end surface of the scan abutment portion 740 is formed in the same shape as the upper surface shape of the upper portion of the base abutment 200, Thereby forming a curved surface.

A hexagonal column-shaped recessed portion 760 inserted into the polygonal groove 220 of the base abutment 200 is formed on the outer peripheral surface of the lower end extended portion of the center hole 710. The inserting portion 760 is inserted into the polygonal groove 220 so that when the second screw 800 is passed through the scan body 700 and fastened to the base abutment 200, Thereby preventing relative rotation with respect to the abutment 200.

The second screw 800 passes through the center hole 710 of the scan body 700 and is fastened to the inner circumferential surface thread portion 240 of the base abutment 200.

The second screw 800 includes a head portion 820 inserted into and supported by the upper hole portion 720 of the scan body 700, a body portion 840 extending in a cylindrical shape below the head portion, And a screw portion 860 formed on the outer peripheral surface of the lower end of the portion.

Like the head 520 of the first screw 500, the head 820 is formed so that its outer diameter gradually decreases toward the bottom, but the dimensions of the head 820 may be different from each other.

The body portion 840 is inserted into the center hole 710 of the scan body 700 and the center hole 210 of the base abutment 200 when the body portion 840 is fastened.

The screw portion 860 is finally fastened to the inner circumferential surface thread portion 240 of the base abutment 200. The screw portion 750 is also formed on the inner circumferential surface of the center hole 710 of the scan body 700. [ The screw portion 860 of the second screw 800 can be temporarily fastened to the screw portion 750 of the scan body 700 when the second screw 800 is fastened.

The scan body 700 may further include a vertical groove 780 formed on the opposite side of the vertical milling surface 770 formed on one side of the upper end outer peripheral surface.

The longitudinally milled surface 770 may be formed on one side of the outer circumferential surface of the scan body 700 to have a predetermined size from the top. The vertical groove 780 may have a groove shape having a predetermined width and length from the upper end on the outer circumferential surface opposite to the longitudinal milling surface 770.

The scan body 700 is coupled to the base abutment 200 by the second screw 800 to perform an oral scan to obtain a digital image file in the oral cavity.

In such an oral scan, the longitudinally milled surface 770 and the longitudinal groove 780 may provide a reference point for location identification of the oral image.

In addition, the scan body 700 may have a truncated cone shape as a whole. In FIG. 9, the outer contour of the scan body 700 is shown as an inclined straight line. Alternatively, the outer contour of the scan body 700 may be curved outwardly.

A temporary prosthesis may be adhered to the outer surface of the scan body 700 by cement. That is, the scan body 700 may be coupled to the base abutment 200 to prepare a temporary prosthesis for the scan body 700 after the oral scan, and the prosthesis may be attached to the scan body 700 with cement. So, even before combining the final prosthesis, the patient can use the temporary prosthesis to chew the food.

Preferably, the temporary prosthesis adhered with cement is a PFM (Porcelain Fused Metal) prosthesis. In contrast, the prosthesis 400 to be fastened with a screw may be made of a zirconia material.

In addition, the prosthesis adhered to the scan body 700 with cement may not be used temporarily but may be a prosthesis to be finally used. In this case, the healing cap 600 is coupled to the base abutment 200 to restore the gums. Then, the healing cap 600 is disassembled and the scan body 700 is coupled to the base abutment 200 do. The scan body 700 is used to perform an oral scan to produce a prosthesis, and then the prosthesis is attached to the scan body 700 using cement.

When the temporary or final prosthesis is attached to the scan body 700 with the cement, the scan body 700 can function not only as a scan body but also as a cement adhesion abutment.

A process of performing an implant procedure using the abutment assembly of the present invention will be described as follows.

First, the fixture 100 can be placed using the base abutment 200 when the fixture 100 is placed on the alveolar bone.

Next, the healing cap 600 is fastened to the base abutment 200 to heal the gums to form a emmagen profile.

Next, the healing cap 600 is disassembled and the scan body 700 is coupled to the base abutment 200 using the second screw 800 instead. And scan the oral cavity based on the combined scan body 700 to produce the prosthesis 400.

Next, the scan body 700 is disassembled and the prosthesis 400 and the upper abutment 300 are coupled to the base abutment 200 using the first screw 500. The upper hole of the insertion hole 410 of the prosthesis 400 may be filled with resin or the like.

In the case of bonding the cement-attaching prosthesis, the scan body 700 is left without being disassembled, and a prosthesis corresponding to the scan body 700 is prepared after the oral scan. The prosthesis can be attached to the scan body 700 by cement.

If the temporary restoration of the cement is temporary, the final prosthesis 400 is also prepared separately. After removing the temporary prosthesis, the final prosthesis 400 is fixed to the base 500 using the first screw 500 and the upper abutment 300, To the abutment (200).

If the cementing restoration is the final one, the first screw 500 and the upper abutment 300 are not needed and the base abutment 200 functions as an abutment for the cementing restoration do.

The inclined upper outer circumferential surface of the base abutment 200 may support the lateral pressure applied during the buccal masticatory movement when the prosthesis coupled by the screw or the prosthesis coupled by the cement to the scan body is covered.

According to the present invention, a healing cap, a scan body, or an upper abutment and a prosthesis can be interchangeably (selectively) coupled to the base abutment after the base abutment is fastened to the fixture, The process can be dramatically simplified.

Particularly, since the base abutment having the cuff portion is fastened to the lower outer peripheral surface immediately after the fixture is inserted into the alveolar bone, there is no need to fasten the cover screw or the healing abutment. Since the separate lid screw and the healing abutment are not fastened and removed, the biological width, which is the height at which the connective tissue and the epithelial tissue are bonded to the tooth in the tooth by the cuff portion of the base abutment, , Which provides early biological stability and provides an ideal environment for osseointegration and prevents infection around the implant.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Changes will be possible.

100: Fixture 120: Inner circumferential surface thread portion
140: outer peripheral surface thread portion
200: Base abutment 210: Center hole
220: multiple grooves 230: support jaw
240: inner circumferential surface threaded portion 260: cuff portion
280: Lower thread
300: upper abutment 310: through hole
320: post portion 322: incision groove
323: Slot 325:
340: extended blade part 360: lower part
370: screw portion 380:
400: prosthesis 410: inlet hole
420: upper end hole part 430: inclined curved surface
440: stop jaw 460: bottom hole portion
465: support groove 480: extension hole portion
500: first screw 520: head
540: intermediate portion 550: tapered portion
560:
600: Healing cap 620:
640: shaft portion 660:
700: scan body 710: center hole
720: upper end hole portion 730: inclined curved surface
740: seating groove 750: threaded portion
760: placing part 770: longitudinal milling face
780: Vertical groove
800: Second screw 820: Head
840: Body part 860: Screw part

Claims (7)

A fixture fixedly embedded in the alveolar bone and having an inner circumferential threaded portion;
A base abutment provided with a lower end threaded portion to be fastened to an inner circumferential threaded portion of the fixture and an inner circumferential threaded portion formed at a lower portion of the center hole;
An upper abutment inserted into the polygonal groove formed on the central hole of the base abutment and coupled thereto;
A prosthesis in which a top post portion of the upper abutment is inserted into the lower portion and into which a receiving hole is formed; And
And a first screw inserted into the insertion hole of the prosthesis so as to be inserted into the upper portion and coupled to the inner circumferential surface thread portion of the base abutment through the upper abutment,
Wherein the base abutment can be fastened to the healing cap or scan body. The method according to claim 1,
Wherein the upper outer circumferential surface of the base abutment is formed as an inclined surface at a predetermined angle with a smaller outer diameter toward the upper end so that the lower end groove portion of the prosthesis, the healing cap or the scan body is selectively seated. The method according to claim 1,
The post portion of the upper abutment includes a plurality of incision grooves formed vertically from the top,
Wherein the first screw is formed with a tapered portion on an outer circumferential surface of the intermediate portion so that the post portion is expanded when the inserted portion is inserted into the post portion so that the post portion is pressed on the inner circumferential surface of the inlet hole of the prosthesis. The method according to claim 1,
The healing cap comprises:
And a shaft portion having a seating groove portion that is seated on an upper portion of the base abutment and a thread portion that is extended from a center bottom surface and is formed at a lower end thereof. The method according to claim 1,
The scan body includes a center hole penetrating vertically, a seating groove seated on an upper portion of the base abutment, and a mounting portion formed on an outer peripheral surface of a lower end extending portion of the center hole and inserted into a polygonal groove of the base abutment and,
Wherein the scan body is coupled to the base abutment by a second screw threaded through an inner hole of the base abutment through the center hole. The method according to claim 1,
Wherein the scan body further comprises a vertical groove formed on the opposite side of the vertical milling surface formed on one side of the upper end outer circumferential surface to provide a reference point for position identification during oral scan. The method according to claim 6,
The scan body has a truncated cone shape,
Wherein a temporary prosthesis is attached to the outer surface of the scan body by cement.

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