KR20200014558A - Abutment assembly - Google Patents

Abstract

The purpose of the present invention is to provide an abutment assembly capable of innovatively easily performing an implant procedure process by enabling a healing cap, a scan body or an upper abutment and a prosthetic appliance to be compatibly (selectively) coupled to the base abutment after fastening a base abutment to a fixture. The abutment assembly according to the present invention includes: the fixture which is buried in and fixed to alveolar bone and includes an inner circumferential surface screw part; the base abutment which includes a lower screw part fastened to the inner circumferential surface screw part of the fixture and has an inner circumferential surface screw part formed in a central hole thereof; the upper abutment which is inserted into and coupled to a polygonal groove formed in an upper portion of the central hole of the base abutment; the prosthetic appliance in which an insertion hole is formed such that an upper post portion of the upper abutment is inserted into and coupled to the insertion hole from the lower side; and a first screw which is inserted into and coupled to the insertion hole of the prosthetic appliance from the upper side, and is fastened to the inner circumferential surface screw part of the base abutment by passing through the upper abutment, wherein the healing cap or the scan body can be fastened to the base abutment.

Description

Abutment assembly

The present invention relates to an abutment assembly.

Implants are the replacements that are originally restored when human tissue is lost, but implants are implants of artificial teeth. To replace the lost tooth roots (齒 根) is a procedure to restore the function of the tooth by planting a tooth root made of titanium (titanium), etc., which has no rejection reaction to the human body, and then fixing the artificial teeth.

Ordinary prosthetics or dentures may damage the surrounding teeth and bones over time, but the implants do not damage the surrounding dental tissue, and have the same function or shape as natural teeth and do not cause tooth decay.

Implants also enhance the function of dentures and improve the aesthetic aspects of dental prosthetic repair, as well as single missing tooth repairs. Furthermore, it disperses excessive stress on surrounding supportive bone tissue and helps stabilize teeth.

Implant procedures performed in the dentistry are divided into surgical procedures for implanting implants in the gum bone, that is, alveolar bone, and prosthetic processes for mounting artificial teeth by connecting the abutment to the implanted implant.

There may be a variety of methods of implantation, one of which is briefly described as follows.

First of all, through drilling and tapping, grooves corresponding to the fixture dimensions are formed, and a mount is mounted on the fixture. The fixture is then embedded in the alveolar bone by embedding the fixture and mount into the alveolar bone using the surgical hand piece and then removing the mount from the fixture. The first operation is completed by fastening a cover screw to the upper part of the fixture to seal the fixture.

The lid screw blocks the entry of bacteria and foreign objects in the oral cavity into the fixture while waiting for the bone fusion of the fixture. Bone fusion periods vary somewhat depending on the bone quality and location of the patient, but generally take three to six months.

Subsequently, the gum is opened through a second operation to expose the cover screw, and then the degree of bone fusion of the fixture is checked and the cover screw is removed. Then a healing abutment is fastened to the top of the fixture for aesthetic gum formation and waits for two to three weeks. In recent years, in order to improve the complexity of the secondary procedure, a first procedure of directly fastening the healing abutment is omitted, without the process of fastening and removing the cover screw.

Next, after confirming aesthetic gum formation, the healing abutment is removed, and an impression coping is fastened to the upper portion of the fixture to produce a prosthesis. The impression material is then used to obtain a preliminary impression in the oral cavity and to remove the impression coping.

Then, a tooth model is made, the artificial teeth are ground, an abutment is fastened to the upper part of the fixture, and a prosthesis or artificial tooth is fixed to the abutment to complete the artificial teeth.

By the way, the method of coupling the prosthesis which is artificial tooth to the abutment, there is a cement (cement) bonding method and a screw fastening method.

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

Patent Document 1 (Patent No. 10-1768410) discloses an example of an abutment (locking link) that is coupled to the prosthesis by a screw fastening method.

Locking link according to the prior art disclosed is formed to be fixed by interference fit when inserting the coupling portion to the prosthesis. To this end, the coupling portion of the locking link interposed in the prosthesis is formed to extend from the bottom to the top, but formed a plurality of longitudinal incision grooves and formed a groove in the horizontal direction on the outer circumferential surface.

However, the conventional locking link has a problem that it is difficult to insert the closed upper end when inserting the coupling portion to the prosthesis. In addition, there is a fear that the groove portion of the coupling portion is plastically deformed or broken in the process of forcing the coupling portion to the prosthesis. In addition, since the coupling portion is coupled to the prosthesis in a state in which the coupling portion is elastically deformed by the fitting, the coupling portion is continuously stressed, so that the coupling portion is deformed or broken over time.

On the other hand, Patent Document 2 (Patent No. 10-1417980) has a scan body having a polygonal projection formed at the end, a body portion formed on the upper portion of the projection and larger than the projection, and the inclined connection portion connecting the projection and the body portion Wow; A coupling hole formed downward from the upper end, a polygon groove formed in the middle of the coupling hole to which the polygonal protrusions are coupled, and a lower portion of the polygon groove formed on the inner surface of the coupling hole, the fixture being fixed to the alveolar bone; There is also disclosed an implant assembly comprising a screw thread penetrating a through-hole of a scan body, the screw portion of which the lower end portion is coupled to the threaded portion of the fixture, and a fixing screw formed larger than the thread portion to fix the scan body to the fixture. .

The scan body of Patent Literature 2 functions as a reference body for acquiring three-dimensional images inside the oral cavity during oral scanning without combining a separate scan adapter while being coupled to the fixture, and can form an immersion profile during gingival healing. It can also function as a healing abutment.

However, in the case of Patent Document 2, when combining the prosthesis designed 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 assembling the scan body and the prosthesis is separately provided and assembled, the abutment is not only inefficient, but also the procedure is complicated and burdensome to the patient and the doctor.

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

The present invention allows fastening a base abutment to a fixture, and then compatible (optionally) coupling a healing cap, scan body, or upper abutment and prosthesis to the base abutment, thereby providing an implant procedure. It is an object of the present invention to provide an abutment assembly that can be easily achieved.

Abutment assembly of the present invention for achieving the above object, a fixture embedded in the alveolar bone and fixed with an inner peripheral surface screw; A base abutment having a lower thread portion coupled to an inner circumferential surface thread portion of the fixture and having an inner circumferential surface thread portion at a lower portion of the center hole; An upper abutment inserted into and coupled to a polygonal groove formed on an upper portion of the center hole of the base abutment; A prosthesis having an inlet hole to which the upper post portion of the upper abutment is inserted and coupled below; And a first screw inserted into and coupled to the inlet hole of the prosthesis and passing through the upper abutment and fastened to an inner circumferential surface of the base abutment, wherein the base abutment includes a healing cap or a scan body. Can be fastened.

The upper outer circumferential surface of the base abutment is formed as an inclined surface of a predetermined angle that the outer diameter decreases toward the upper end so that the lower groove of the prosthesis, the healing cap or the scan body is selectively seated.

The post portion of the upper abutment includes a plurality of cutout grooves formed vertically from an upper end, and the first screw has a tapered portion formed on an outer circumferential surface of the middle portion to expand the post portion when the post portion is inserted into the post portion, so that the post portion is formed of the prosthesis. It is preferable to press the inner circumferential surface of the inlet hole.

The healing cap preferably includes a seating groove portion seated on an upper portion of the base abutment and a shaft portion extending from a center lower surface and having a screw portion at a lower end thereof.

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

The scan body preferably further includes a longitudinal groove formed on the side opposite to the longitudinal milling surface formed on one side of the outer circumferential surface of the upper end to provide a reference point for positional identification during oral scanning.

It is preferable that the scan body has a truncated conical shape, and a temporary prosthesis can be adhered to the outer surface of the scan body by cement.

According to the abutment assembly of the present invention described above, after fastening the base abutment to the fixture, the base abutment is compatible (optionally) with a healing cap, scan body, or upper abutment and prosthesis. As it can be combined, the implant procedure can be easily accomplished.

In the prior art, although a mount is coupled to a fixture for fixing fixtures, the fixture is implanted by rotating the mount. However, in the present invention, a fixture may be implanted using a base abutment, so a separate mount may be combined to fix the fixture. no need.

In addition, the healing cap can be combined with the base abutment to be used as a healing abutment, the scan body can be combined with the base abutment to obtain a digital image of the inside of the oral cavity, and the prosthesis is attached to the scan body with cement. Thus, the scan body can also be used as an abutment for cement bonding.

That is, the base abutment combined with the healing cap replaces the role of the healing abutment, and the base abutment is bonded to the fixture at an early stage to form a biological width, thus creating an ideal environment for bone fusion. And alveolar bone preservation is formed early and much higher stability compared to the prior art.

After the oral cavity scan, the scan body is separated and the manufactured prosthesis can be fastened to the base abutment using the upper abutment and the screw.

In addition, the upper outer peripheral surface of the base abutment is formed as a tapered inclined surface, it is possible to fully support the lateral pressure applied during the intraoral chewing movement when the prosthesis is covered.

1 is an exploded cross-sectional view of an abutment assembly according to an embodiment of the present invention.
2 is a cross-sectional view of the abutment assembly combined according to an embodiment of the present invention.
3 is a view of fastening the base abutment to the fixture in FIG.
4 and 5 are diagrams for coupling the upper abutment to the prosthesis.
5 is a view of fastening the prosthesis and the upper abutment with screws to the base abutment fastened to the fixture.
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 a fixture.
FIG. 8 is a cross-sectional view illustrating a fixture, a base abutment, and a healing abutment in FIG. 7.
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 illustrating a state in which a fixture, a base abutment, and a scan body are combined in FIG. 9.

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

1 is an exploded cross-sectional view of the abutment assembly according to an embodiment of the present invention, Figure 2 is a combined cross-sectional view of the abutment assembly according to an embodiment of the present invention.

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

The fixture 100 is an artificial tooth root embedded in the alveolar bone, and the fixture 100 may include a screw part 120 formed on an inner circumferential surface and a thread part 140 formed on an outer circumferential surface.

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

The outer circumferential surface screw portion 140 may be formed of a triangular screw to be fastened while digging into the alveolar bone, or may be formed of a triangular screw with an upper pointed square thread and gradually getting sharper toward the lower side.

In addition, although the outer diameter of the fixture 100 is shown to be formed the same from the top to the bottom, it may be formed so that the outer diameter gradually decreases from the top to the bottom.

The base abutment 200 has a lower threaded portion 280 that is fastened to the inner circumferential surface threaded portion 120 of the fixture 100. In addition, an inner circumferential surface screw portion 240 is formed at a lower portion of the central hole 210 formed downward from an upper surface. The lower end portion 560 of the first screw 500 is fastened to the inner circumferential surface 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 is inserted and coupled thereto. The polygon 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, in response to the lower end of the upper abutment 300 made of a hexagonal pillar-shaped mounting portion 380, the polygonal groove 220 is also made of a hexagonal groove shape. Thus, the mounting portion 380 of the upper abutment 300 may 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 the hexagonal groove shape, but may be formed in the shape of a square groove or an octagonal groove. In this case, the implantation part 380 will also be made in the form of a square pillar or an octagonal pillar corresponding to the shape of the polygonal groove 220.

On the other hand, the prosthesis 400 is seated on the upper portion of the base abutment 200 is supported. The upper outer circumferential surface of the base abutment 200 is formed as an inclined surface of a predetermined angle that the outer diameter decreases toward the upper end, the expansion hole 480 of the prosthesis 400 to be described later, the seating groove 620 of the healing cap 600 Alternatively, the mounting groove 740 of the scan body 700 may be selectively mounted.

The upper outer circumferential contour of the base abutment 200 may be formed to be inclined at an angle of about 5 to 45 degrees with respect to the rotation axis of the center. That is, the upper outer circumferential surface of the base abutment 200 may have a truncated truncated cone shape at an angle of 5 to 45 degrees. The inclined outer circumferential surface of the base abutment 200 can cope with the lateral pressure applied when the oral mastication exercise is applied when the prosthesis is covered.

In addition, the base abutment 200 may be further formed with a milling surface (not shown) forming a plane cut on one side of the upper outer peripheral surface. The milling surface may prevent the prosthesis 400 or the scan body 700 coupled to the base abutment 200 from being secondarily rotated after the coupling.

In addition, the support jaw portion 230 is preferably formed at the outer peripheral portion of the middle portion of the base abutment 200 so as to stably support the lower surface of the prosthesis 400. The support jaw portion 230 is formed to form a horizontal plane, but may also be formed to form an inclined plane.

In addition, a cuff portion 260 having an outer circumferential surface in contact with the gum is formed below the support jaw portion 230 of the base abutment 200. The cuff 260 is a portion that forms a contour extending downward from the outer periphery of the support jaw 230, and is a portion where the gum of a person contacts. Since human gums have various shapes and sizes, the cuff portion 260 may also be formed in various shapes.

Nevertheless, it is preferable that the outer circumferential surface of the cuff 260 is basically formed in an S-shaped curved shape to favor the formation of an immersion profile.

In the prosthetic process of attaching an artificial tooth to a fixture, an artificial tooth can be accurately made in a laboratory only if the oral state is reproduced out of the oral cavity without error. Reproduction of the condition in the oral cavity outside the oral cavity is called impression acquisition.

When the outer circumferential surface of the cuff portion is formed to be linearly bent as in the cuff portion according to the prior art, an error may occur when the impression body is pressed, which is not the same as the inner surface shape of the patient's gum. On the other hand, since the outer peripheral surface of the cuff portion 260 of the present invention is formed of an elongated S-shaped curved surface, it is possible to form the immersion profile very accurately by pulling up.

In addition, since the fixture 100 is fastened to the alveolar bone, the base abutment 200 having the cuff portion 260 formed thereon is fastened to the outer peripheral surface of the alveolar bone. Therefore, it is necessary to fasten the cover screw to the healing abutment. none. Since there is no process of fastening and removing a separate cover screw and healing abutment, the cuff portion 260 of the base abutment 200 is a height at which the connective tissue and the epithelial tissue are coupled to the tooth. Biological widths can arise from the healing phase, providing early biological stability, providing an ideal environment for bone bonding and preventing infections around the implant.

The upper abutment 300 is inserted into and coupled 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 has a hexagonal pillar shape to form the placement portion 380. The implantation part 380 may be formed only on the outer circumferential surface of the lower half of the lower part 360, not the entire lower part 360. That is, the outer circumferential surface of the upper half of the lower part 360 may have a cylindrical shape, and the implantation part 380 may be formed only in the lower half thereof.

In addition, the upper abutment 300 is inserted into the prosthesis 400 is coupled to the upper post portion 320, the lower side 360 and the post portion 320 extending laterally to support the prosthesis It further includes an extension blade portion 340 of the interruption.

The post part 320 is inserted into the lower hole part 460 of the prosthesis 400 from the bottom to the top thereof and is coupled thereto. The post portion 320 is formed with a plurality of cutting grooves 322 vertically from the top. The cutting grooves 322 are spaced apart from each other by 90 degrees in the post part 320, but the number of the cutting grooves 322 is not limited thereto, and may be formed in three to six pieces.

In addition, the lower end of the cutting groove 322 is preferably formed with a circular slot 323 having a diameter larger than the width of the cutting groove. The circular slot 323 may have a diameter larger than the width of the cutout 322 and may be continuously formed at the bottom of the cutout.

The cutting groove 322 allows the post portion 320 to be elastically deformed, but stress may be concentrated at the lower end of the cutting groove 322 when the post portion 320 is deformed. The circular slot 323 may be prevented from being damaged around the cutting groove 322 by dispersing the stress that can be concentrated on the lower end of the cutting groove 322.

The extension blade portion 340 extends laterally from the lower end of the post portion 320 to form a circular disk, the central lower surface of the prosthesis 400 can be supported on the upper surface. When the prosthesis 400 is pressed by the mastication movement, the extension blade portion 340 may firmly support the prosthesis 400.

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

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

The protrusion 325 may be formed in a triangle when viewed from the side. In an embodiment in which a total of four protrusions 325 are formed, 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 460 of the prosthesis 400. Thus, when the post part 320 is inserted into the lower hole part 460, the upper part of the post part 320 may be inserted while being elastically deformed to slightly shrink.

 A plurality of support grooves 465 are formed on the inner surface of the lower hole part 460 of the prosthesis 400 in a form corresponding to the plurality of protrusions 325. Thus, when the post portion 320 is pushed into the lower hole 460 to the end, the plurality of protrusions 325 are inserted into the plurality of support grooves 465 while the upper abutment 300 and the prosthesis 400 These can be temporarily combined with each other.

The protrusion 325 may be formed in a trapezoidal to quadrangular shape, an arc shape to an elliptic shape, or a convex curved surface, unlike the illustrated figure. At this time, the support groove 465 will be made of a groove shape corresponding to the shape of the protrusion 325.

In addition, it is preferable that the thickness of the post portion 320 of the upper abutment 300 gradually decreases.

The post part 320 is elastically deformed to be extended by the tapered part 550 of the first screw 500, which is compressed and fixed to the lower hole part 460 of the prosthesis 400. Thus, the post part 320 is formed to have a smaller thickness toward the top in consideration of the deformation amount before and after expansion, so that the elastic deformation can be easily made and the fixing strength can be increased.

On the other hand, the through hole 310 is formed in the vertical direction in the center of the upper abutment 300, the first screw 500 can pass through. The inner circumferential surface of the through hole 310 is formed with a screw portion 370 to a predetermined height, so that the lower end portion 560 of the first screw 500 may be temporarily fastened.

The prosthesis 400 forms an external shape of an artificial tooth and is customarily processed through a computer aided design (CAD) or computer aided manufacturing (CAM) system in a dental laboratory. The prosthesis 400 is preferably made of zirconia. In the center of the prosthesis 400, the upper abutment 300 is inserted from the lower side and the inlet hole 410 through which the first screw 500 is inserted from the upper side is formed to penetrate up and down.

The inlet hole 410 of the prosthesis 400 may include an upper upper hole portion 420, a stop jaw portion 440, a lower hole portion 460, and an expansion hole portion 480 of the lower portion.

The head 520 of the first screw 500 may be inserted into and supported by the upper hole 420. As shown in FIG. 2, the upper hole portion 420 has a larger vertical length than the head portion 520 so that the head portion 520 is completely inserted into the upper hole portion 420. Filler may be additionally filled in the above space.

The lower portion of the upper hole portion 420 may be formed as an inclined curved surface 430 which gradually decreases in diameter. Correspondingly, the head 520 may also be formed as a curved surface having a smaller outer diameter as it goes down.

The stopping jaw portion 440 is a portion where an inner diameter is formed to be the smallest between the upper hole portion 420 and the lower hole portion 460. The head portion 520 is supported on the stopping jaw portion 440, and Underneath the upper abutment 300 may be supported so that it does not go up any more.

As described above, the lower hole part 460 is a portion into which the post part 320 of the upper abutment 300 is inserted and coupled from below, and is formed to have an inner diameter equal to the maximum outer diameter of the lower end of the post part 320. . That is, the outer diameter of the post part 320 may be formed to become smaller as the upper part, the post part 320 when the post part 320 is extended by the taper part 550 of the first screw 500. The lower hole portion 460 is formed so that the lower hole portion 460 is compressed.

The expansion hole part 480 is formed to extend downward from the lower hole part 460, and is supported by the extension blade part 340 of the upper abutment 300 and the upper outer surface of the base abutment 200. It is a part. Thus, an upper portion of the expansion hole 480 is formed to be stepped in correspondence with the extension blade portion 340, and below it forms a concave curved surface extending in the same shape as the upper outer surface of the base abutment 200. In addition, as shown in Figure 2, the lower surface of the prosthesis 400 is supported by the support jaw portion 230 of the base abutment 200, the lower outer peripheral surface of the prosthesis 400 is the base abutment A curved surface smoothly connected to the cuff 260 of the garment 200 is formed.

As shown in FIG. 1, the first screw 500 may have an upper head 520, an intermediate part 540, and a lower end 560 integrally formed thereon.

The head portion 520 may be formed with a hexagonal groove to be rotated by inserting a hexagon wrench on the upper surface. The outer circumferential surface of the head 520 may be formed as a curved surface with an outer diameter gradually decreasing downward. Correspondingly, an inclined curved surface 130 is formed below 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 straight line shape. In other words, the side surface of the head 520 may be formed in a tapered shape at a predetermined angle.

Alternatively, the side contour of the head 520 may be formed in a convex downward curved form. In particular, it is preferable that the curve has a curved shape in which the radius of curvature gradually decreases downward.

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

The taper portion 550 extends the post portion 320 when the first screw 500 is fastened to the fixture 100 by passing through the upper abutment 300, so that the post portion of the prosthesis 400 is extended. The inlet hole 410 is pressed and fixed to the inner circumferential surface thereof. Thus, the taper portion 550 opens the post portion 320 to be compressed and fixed to the inner circumferential surface of the lower hole portion 460 of the prosthesis 400.

The lower end portion 560 has a thread formed therein, and may be fastened to the screw portion 240 formed on the inner circumferential surface of the base abutment 200. In addition, the screw portion 370 is formed on the inner circumferential surface of the upper abutment 300, so that the lower end portion 560 of the first screw 500 may be connected to the abutment 300 as described later. It may 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 below. 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. The gingival healing may be performed, and oral scanning may be performed by fastening the scan body 700 to the base abutment 200.

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

First, a hole is drilled in the alveolar bone and the fixture 100 is implanted. At this time, the fixture 100 is fastened to be inserted about halfway into the alveolar bone hole with a machine driver, and then the lower threaded portion 280 of the base abutment 200 is fastened to the inner peripheral surface threaded portion 120 of the fixture 100, The fixture 100 may be fully implanted into the alveolar bone hole using a wrench that fits into the polygonal groove 220 of the base abutment 200. As such, the base abutment 200 may serve as a fixture mounting member that is conventionally provided and coupled separately when the fixture 100 is placed in the alveolar bone.

After implantation of the fixture 100, it should be checked whether the fixture 100 is implanted in the alveolar bone at the correct depth and angle. Since the upper portion of the base abutment 200 is exposed to the outside of the gum, it is possible to check whether the fixture 100 is properly placed by visually observing the base abutment 200.

In FIG. 3, the fixture 100 is first completely implanted in the alveolar bone, and then the base abutment 200 is fastened. However, as described above, the base abutment 200 may also be inserted. The fixture 100 may be implanted using the reference numeral) and the defect of the implantation may be checked.

In the related art, although a mount is attached to a fixture for fixing the fixture and the mount is rotated to fix the fixture, the present invention does not need to combine a separate mount because the base abutment is used for fixing the fixture.

Next, as shown in FIG. 4, the post part 320 of the upper abutment 300 is inserted into the lower hole 460 of the prosthesis 400 from the bottom up. When the post portion 320 is inserted into the lower hole portion 460, the outermost end of the protrusion 325 is pushed by the lower hole portion 460 so that the upper portion of the post portion 320 is elastically reduced, and then the protrusion 325. Is inserted into the support groove 465, the upper abutment 300 and the prosthesis 400 may be temporarily coupled to each other.

Next, as shown in FIG. 5, the first screw 500 is inserted downward from the top of the inlet hole 410 of the prosthesis 400 and rotated with a hexagon wrench, thereby lowering the lower thread part 560. It is temporarily fastened to the inner circumferential surface screw portion 370 of the buttement 300.

Next, the prosthesis 400 and the upper abutment 300, which are coupled to each other, are seated on the base abutment 200, and the first screw 500 is further rotated with a wrench to the lower thread part 560. To the inner peripheral surface screw portion 240 of the base abutment 200.

As shown in FIG. 6, when the lower threaded portion 560 of the first screw 500 begins to be fastened to the inner circumferential surface threaded portion 240 of the base abutment 200, the taper of the first screw 500 is tapered. The portion 550 extends the post portion 320 of the upper abutment 300.

Subsequently, when the first screw 500 is rotated, the lower end portion 560 is screwed into the inner peripheral surface of the base abutment 200 until the head portion 520 is pressed against the inclined curved surface 430 of the prosthesis 400. 240). In this case, the tapered portion 550 is pressed to the lower hole portion 460 of the prosthesis 400 to be completely in contact with the post portion 320.

When the assembly is completed, as shown in FIG. 2, the base abutment 200 is firmly coupled to the fixture 100, and at the same time, the prosthesis 400 and the upper abutment are formed by the first screw 500. 300 may be firmly coupled to the base abutment 200.

Next, the healing cap assembly structure will be described with reference to FIGS. 7 and 8.

The healing cap 600 includes a seating groove 620 seated on an upper portion of the base abutment 200 and a shaft portion 640 extending from a bottom surface of the center and having a screw portion 660 formed at a lower end thereof.

The seating groove 620 has a shape corresponding to the upper outer surface shape of the base abutment 200, the lower outer peripheral surface of the healing cap 600 is smooth to the cuff 260 of the base abutment 200. A curved surface is formed.

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

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

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

By coupling the healing cap 600 to the fixture 100 fixed to the alveolar bone through the base abutment 200, as shown in FIG. 8, the healing cap 600 and the base abutment 200 during gingival healing. ) May serve as a healing abutment.

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

The scan body 700 is formed in a vertically formed central hole 710, a seating groove 740 seated on an upper portion of the base abutment 200, and an outer circumferential surface of the lower end of the central hole, and being formed in the base. It includes an implantation portion 760 is inserted into the polygonal groove 220 of the abutment.

The central hole 710 is vertically penetrated in the center of the body of the scan body 700. The upper hole portion 720 of the central hole 710 is formed in the same shape as the head portion 820 of the second screw 800 to be described later to support the head portion 820 is inserted. To this end, the inner circumferential surface of the upper hole portion 720 may form an inclined curved surface 730 gradually smaller toward the bottom.

The side wall constituting the lower portion of the central hole 710 extends downwardly around the central hole 710. The extension part is inserted into an upper portion of the center hole 210 of the base abutment 200.

The seating groove 740 is formed upward from the bottom surface of the scan body 700 around an extension around the center hole 710. The seating groove 740 is formed in the same shape as the upper outer surface of the base abutment 200, the lower outer peripheral surface of the scan body 700 is also smoothly connected to the cuff portion 260 of the base abutment 200. To form a curved surface.

On the outer circumferential surface of the lower extension part of the central hole 710, an implantation part 760 having a hexagonal pillar shape inserted into the polygonal groove 220 of the base abutment 200 is formed. The insertion portion 760 is inserted into the polygonal groove 220, and when the scan body 700 is fastened to the base abutment 200 by passing through the scan body 700 with the second screw 800, the scan body 700 is the base It does not rotate relative to the abutment 200.

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

The second screw 800 has 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 body. It may include a screw portion 860 formed on the outer peripheral surface of the lower end.

Similar to the head 520 of the first screw 500, the head 820 is formed to have a smaller outer diameter as it goes down, but may have different dimensions.

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

The screw portion 860 is finally fastened to the inner circumferential surface screw portion 240 of the base abutment 200, but the screw portion 750 is also formed on the inner circumferential surface of the central hole 710 of the scan body 700. Thus, when the second screw 800 is fastened, the screw portion 860 of the second screw 800 may be temporarily fastened to the screw portion 750 of the scan body 700.

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

The vertical milling surface 770 may be formed to form a plane of a predetermined size from an upper end on one side of the outer circumferential surface of the scan body 700. The vertical groove 780 may be formed in a groove shape having a predetermined width and length from an upper end on an outer circumferential surface of the vertical milling surface 770.

The oral scan may be performed in a state where the scan body 700 is coupled to the base abutment 200 by the second screw 800 to obtain an intraoral digital image file.

During the oral cavity scan, the longitudinal milling surface 770 and the longitudinal groove 780 may provide a reference point for location identification of the oral cavity image.

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

In addition, 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 produce a temporary prosthesis suitable for the scan body 700 after oral scanning, and attach the prosthesis to the scan body 700 using cement. Thus, the patient can use the temporary prosthesis to chew food even before the final prosthesis is combined.

The temporary prosthesis bonded with cement is preferably a Porcelain Fused Metal (PFM) prosthesis. On the contrary, the prosthesis 400 fastened by a screw may be made of zirconia.

In addition, the prosthesis adhered to the scan body 700 by cement may be a prosthesis that is finally used instead of being temporarily used. In this case, after restoring the gum by coupling the healing cap 600 to the base abutment 200, the healing cap 600 is disassembled and the scan body 700 is coupled to the base abutment 200. do. The oral scan is performed using the scan body 700 to produce a prosthesis, and then the prosthesis is attached to the scan body 700 using cement.

As such, when the temporary or final prosthesis is attached to the scan body 700 by cement, the scan body 700 may have not only a function as a scan body but also a function as cement abutment.

In general, the procedure for performing an implant procedure using the abutment assembly of the present invention is as follows.

First, when the fixture 100 is implanted into the alveolar bone, it may be implanted using the base abutment 200.

Next, the healing cap 600 is fastened to the base abutment 200 so that the gums are healed to form an immersion 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. An oral scan is performed based on the combined scan body 700 to produce a 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 inlet hole 410 of the prosthesis 400 may be filled with resin or the like.

On the other hand, if the cement bonding prosthesis is combined, leaving the scan body 700 as it is without disassembly, to produce a prosthesis suitable for the scan body 700 after oral scanning. This prosthesis may be attached to the scan body 700 by cement.

If the cement adhesive prosthesis is temporary, the final prosthesis 400 is also manufactured separately, the temporary prosthesis is removed, and then the final prosthesis 400 is formed by using the first screw 500 and the upper abutment 300. Coupling to the abutment 200.

If the cement bonding prosthesis is the final one, the first screw 500 and the upper abutment 300 are not necessary, and the base abutment 200 functions as an abutment for the cement bonding prosthesis. do.

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

According to the present invention, after a base abutment is fastened to a fixture, a healing cap, a scan body, or an upper abutment and a prosthesis can be coupled (optionally) to the base abutment, so that the implant procedure The process can be easily accomplished.

In particular, since after fastening the fixture to the alveolar bone fastening the base abutment formed with the cuff portion on the lower outer peripheral surface, there is no need to fasten the cover screw to the healing abutment. Since the separate cover screw and healing abutment are not fastened or removed, the biological width, which is the height at which the connective and epithelial tissues are bonded to the teeth by the cuff of the base abutment, is the time to heal. Early biologic stability, providing an ideal environment for bone bonding and preventing peri-implant infection.

Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited only to this specific embodiment, and those skilled in the art are appropriately within the scope described in the claims of the present invention. Changes will be possible.

100: fixture 120: inner peripheral surface screw portion
140: outer peripheral thread
200: base abutment 210: center hole
220: polygon groove 230: support jaw
240: inner peripheral surface screw portion 260: cuff portion
280: lower thread
300: upper abutment 310: through hole
320: post portion 322: incision groove
323: slot 325: protrusion
340: extension blade 360: lower
370: screw portion 380: insertion portion
400: prosthesis 410: entry hole
420: upper hole 430: sloped surface
440: stop jaw portion 460: lower hole portion
465: support groove 480: expansion hole
500: first screw 520: head
540: middle portion 550: tapered portion
560: lower portion
600: healing cap 620: seating groove
640: shaft portion 660: screw portion
700: scan body 710: central hole
720: upper hole 730: sloped surface
740: seating groove 750: screw portion
760: mounting portion 770: longitudinal milling surface
780: longitudinal groove
800: second screw 820: head
840: body portion 860: screw portion

Claims (7)

A fixture embedded in the alveolar bone and fixed with an inner circumferential thread;
A base abutment having a lower thread portion coupled to an inner circumferential surface thread portion of the fixture and having an inner circumferential surface thread portion at a lower portion of the center hole;
An upper abutment inserted into and coupled to a polygonal groove formed on an upper portion of the center hole of the base abutment;
A prosthesis having an inlet hole to which the upper post portion of the upper abutment is inserted and coupled below; And
And a first screw inserted into and coupled to the inlet hole of the prosthesis and passing through the upper abutment and fastened to an inner circumferential thread of the base abutment,
Abutment assembly, characterized in that the healing cap or the scan body can be fastened to the base abutment. The method of claim 1,
The upper outer circumferential surface of the base abutment is formed of an inclined surface of a predetermined angle that the outer diameter decreases toward the upper end so that the lower groove of the prosthesis, the healing cap or the scan body is selectively seated. The method of claim 1,
The post portion of the upper abutment includes a plurality of incision grooves formed vertically from the top,
The first screw tapered portion is formed on the outer peripheral surface of the intermediate portion when the abutment is inserted into the post portion by abutment assembly characterized in that the post portion is pressed against the inner circumferential surface of the inlet hole of the prosthesis. The method of claim 1,
The healing cap,
Abutment assembly, characterized in that it comprises a seating groove portion which is seated on the upper portion of the base abutment and a shaft portion extending from the center lower surface and a screw portion formed on the lower end. The method of claim 1,
The scan body includes a vertically penetrating central hole, a seating recess seated on an upper portion of the base abutment, and an implantation part formed on an outer circumferential surface of the lower end of the central hole and inserted into a polygonal groove of the base abutment. and,
And the scan body is coupled to the base abutment by a second screw that is fastened to the inner peripheral surface screw portion of the base abutment through the central hole. The method of claim 1,
The abutment assembly further comprises a vertical groove formed on the side opposite to the vertical milling surface formed on one side of the outer circumferential surface of the scan body to provide a reference point for position identification during oral scanning. The method of claim 6,
The scan body has a truncated conical shape,
The abutment assembly, characterized in that the temporary prosthesis can be adhered to the outer surface of the scan body by cement.

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