KR101673379B1 - Dental implant - Google Patents

Abstract

The present invention relates to a dental implant comprising a fixed body coupled to an alveolar bone and an abutment for resiliently shaft-coupling to the shaft hole of the fixed body, wherein the upper end of the fixed body contacting the fixed body and the abutment body, A concave / convex portion formed of a concave / convex portion having an inclined surface for engaging / disengaging is formed on a circumferential surface at a predetermined position in the vertical direction of the side surface and a corresponding concave / convex portion having a corresponding inclined surface on a circumferential surface of the concave portion, When the abutment is separated from the fixture, the abutment is pulled out in the vertical direction to separate the abutment from the fixture, The abutment is rotated so that the inclined surface of the fastening / separating portion and the corresponding inclined surface of the corresponding fastening / So as to be separated from each other.

Description

[0001] DENTAL IMPLANT [0002]

The present invention relates to a dental implant having a coupling structure that is elastically coupled by an elastic fastening leg formed by a fastener and an abutment of a abutment lower fastening shaft portion inserted into a fastener body shaft and fastened with a fastener, More particularly, the present invention relates to an implant having an elastic fastening leg coupling structure, in which a fastening / separating portion composed of a top surface of a fixture or a concave / convex portion having an inclined surface at a predetermined position in the axial hole of the fixture is formed, The abutment is rotated relative to the fixture so that the abutment is easily separated through the inclined surface and the corresponding inclined surface so that the removal mechanism and the like can be easily separated from the fixture, It is easy to separate the abutment from the fixture without using it. The dentist can easily reduce the stress of the dentist during the implant procedure and reduce the injuries or pain of the patient and reduce the stress of the dentist who is performing the operation. In addition, since the concave / convex portion having the inclined surface and the corresponding concave / The abutment portion and the corresponding concave-convex portion have a function of preventing the rotation of the abutment against the external force less than a certain level, It is not necessary to form a separate angled shape to prevent rotation of the abdomen in the abutment portion inserted into the abutment of the abutment in the abutment of the abutment of the abutment of the abutment so as to prevent the stress from concentrating at one point when the abutment abutment is applied to the abutment abutment. Implant.

Generally, the original meaning of an implant means a replacement that restores when the tissue of the human body is lost, but in dentistry it refers to an artificial tooth implant.

It is a cutting-edge procedure that restores the original function of the tooth by replacing the tooth root of the missing tooth with an artificial tooth made of titanium which has no rejection reaction to the human body.

Conventional general prostheses have the disadvantage of deleting adjacent teeth when the teeth are lost, but the implants have the advantage of not damaging the surrounding tooth tissue.

In addition, it can be used semi-permanently because it has the same function and shape as natural teeth and does not cause cavities.

However, the wrong management can cause the alveolar bone to be destroyed, plugs or tartar due to excessive occlusal force, causing irritation to surrounding tissues and causing periodontal diseases. It takes 2 to 6 months depending on the degree of cure after surgery.

A conventional procedure of implanting implants includes implanting a fixture, which is an implant of the implant, into the alveolar bone; Waiting for a period of time until osseointegration and healing of the gums; Fastening an abutment to a fixture; Performing an impression operation to produce a final prosthesis; Molding the final prosthesis using casting or CAD / CAM according to the surrounding tooth relationship; Attaching a final prosthesis to an abutment attachment portion of an abutment; Implant is performed in the above procedure.

In this case, the existing implant was a method of screwing the fixture and the abutment in the step of fastening the abutment to the fixture, but this technique caused a serious problem such as screw loosening or screw fracture, , An elastic fastening method using an elastic fastening leg type (Korea Patent No. 10-066868) and a tube type elastic fastening type (Korean Patent Application No. 2014-0002816) has been developed.

The technique of such an elastic locking leg type includes an implant unit including a fixture (fixture) coupled to the alveolar bone and an abutment (shaft) that is axially coupled to the shaft hole of the fixture, And an elastic fastening leg extending in the axial direction is formed by the elastic fastening legs.

Such a technique uses a resilient fastening leg coupling structure rather than a conventional screw type so that the procedure is simple and the fastening is performed in a state where the abutment is seated at the correct position during the procedure. The elasticity of the cortical bone surface can be increased by inserting an elastic member into the portion of the cortical bone to buffer the masticating pressure as needed and to reduce the stress generated between the fixture and the alveolar bone when the occlusal force is applied, By minimizing the stress, the external sensation felt by the patient is minimized, and the service life of the implant unit can be increased. In addition to the elastic locking leg type, the tube-like elastic clamping type also has the above-described effects.

However, such prior art has several technical advantages, but has some improvement problems.

Such a problem of the prior art is shown in Fig.

That is, in the implant unit 1 having the conventional elastic fastening leg coupling structure, the abutment 20 inserted into the shaft hole of the fixture 10 is in plane contact with the upper circumferential surface of the fixture 10 without the concave / In this structure, the chewing pressure generated when the user chews the food is not dispersed to the upper edge of the fixture 10 through the mouthpiece 20, and is transferred as it is, so that the stress dispersion effect is not obtained. Therefore, large stress is transmitted to the elastic fastening leg 22 connected to the seat 20 without any stress damping effect, so that the elastic fastening leg 22 is weakened and the durability is relatively reduced.

Another problem is that the occlusion 20 is often separated from the fixture 10 during the implant procedure using the elastic clamping leg type or the tube-like elastic clamping type. In such a case, The extraction mechanism shall be used.

To this end, the applicant of the present invention has proposed a take-out mechanism for separating an achievement from a fixture, as in the "implant abutment take-out mechanism" of Korean Patent Registration No. 10-1309417.

Such a take-out mechanism can separate the attachments 20 more easily and conveniently in separating the attachments 20, which are coupled to the fixture 10 by the fastening method using the elasticity of the elastic body or by the frictional force, It does not damage surrounding teeth and can be used safely.

In addition, even if the separation procedure is repeated several times, the applicant 20 can be separated from the fixture 10 without damaging the implants and the alveolar bone, and the applicant 20 can be easily taken out without rotation, Can be shortened.

However, in the separation system using the conventional extraction mechanism, when the upper surface of the fixture is located below the gum, it is very difficult to position the extraction mechanism in place, It is not possible to position the extraction mechanism in the correct position when it is placed further downward than in the case of a patient with a poor visual acuity. In general, since the extraction mechanism must be properly positioned on the upper surface of the fixture, Respectively. As a result, the practitioner has a problem that the implant operation is troublesome and the patient who is undergoing the procedure experiences inconvenience during the use of the extraction apparatus.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method and an apparatus for implanting an implant, in which, when a user chews food, stress applied to abutment by abutting pressure widens contact area between the fixture and abutment, And an object of the present invention is to provide an improved dental implant capable of reducing the application of an excessive load to the fastening leg.

Another object of the present invention is to provide a method of separating the abutment from the fixture during the implanting procedure by separating the abutment from the fixture by pulling it in the vertical direction and separating the abutment, The present invention provides an improved dental implant that can be easily separated without using a particularly difficult extraction device such as a fryer of a fryer to greatly reduce injury or pain of a patient and to easily perform an implant procedure.

Another object of the present invention is to provide an improved dental implant so that the stress is not concentrated in one place because the lower fastening axis faces of the abutment connected to the inner surface of the fixture shaft hole and the inner surface of the fastener body axial hole are not coupled with each other in an angular shape .

According to another aspect of the present invention, there is provided a dental implant comprising: a fixed body coupled to an alveolar bone; and an abutment abutment elastically coupled to the shaft hole of the fixed body, A coupling separating portion composed of an upper surface or an uneven portion having an inclined surface for engaging and disengaging is formed on a circumferential surface at a predetermined position in a vertical direction on the inner surface of the shaft hole of the fixing body and also corresponds to a peripheral surface of the abutting portion The abutting and separating portion including the corresponding concave and convex portion having the inclined surface is formed so that the stress applied to the abutment is dispersed broadly on the abutting portion by the chewing pressure. When separating the abutment from the abutting portion, the abutment portion is pulled in the vertical direction The abutment is rotated relative to the fixture so that the inclined surface of the fastening / Yes fastening features that are configured to be separated from rising through the corresponding inclined surface portion separated.

Preferably, the abutment is elastically axially coupled to the shaft hole of the fixture by an elastic fastening leg or an elastic fastener, and the present invention is not limited thereto, and includes various fastening schemes in which the abutment is elastically axially coupled to the shaft hole of the fixture It should be interpreted as doing.

On the other hand, the circumferential surface formed on the upper end surface of the fixture body or the inner surface of the shaft hole on which the fastening / separating portion is formed may be formed as an inclined surface rather than a horizontal surface. That is, the vertical position of the outer diameter and the inner diameter of the fixed body may be formed to be different from the inclined face. For example, the fixed body may be formed so as to be inclined from the outer diameter to the inner diameter or vice versa. In this case, an abutment surface rather than a horizontal surface is formed on the abutment portion corresponding to the inclined surface, and the corresponding fastening portion will be provided on the abutment surface.

More preferably, the corresponding fastening / separating portion and the fastening / separating portion are each formed by a protrusion protruding downward from the intermediate rim of the abutment and a recess formed in the upper surface of the fixture corresponding to the protrusion.

Preferably, the corresponding fastening / separating portion and the fastening / separating portion may each be formed by a concave groove formed in the middle rim of the abutment and a protruding portion protruding upward from the upper surface of the fastener body corresponding to the concave groove.

More preferably, the projecting portion has a round cross section, a triangular cross section, or a trapezoid cross section with an inclined surface, while the concave groove may have a shape corresponding to a cross section of the projecting portion, respectively.

Preferably, the fastening / separating portion and the corresponding fastening / separating portion may be formed at at least two positions along the circumference of the upper surface where the fastener is in contact with the fastener.

More preferably, the fastening / separating portion may be formed at a predetermined position in the vertical direction of the inner surface of the fixing pin shaft, not the upper end of the fixing pin.

Preferably, an engaging portion for engaging with the positioning driver may be further formed on the inner surface or the bottom surface of the shaft hole of the fixture.

According to another embodiment of the present invention, there is provided a fixture for dental implants which is coupled to an alveolar bone and is elastically bonded to a alveolar bone, the alveolar implant having a circumferential surface at a predetermined position in the vertical direction of the upper surface of the fixture in contact with the abutment, And a fastening portion is formed on the inner surface of the shaft hole at the lower portion of the fastening / dismounting portion so that the fastener can be fastened.

According to another embodiment of the present invention, there is provided an abutment for an implant for dental use which is elastically coupled to a shaft hole of a fixture coupled to an alveolar bone, wherein the abutment portion includes a corresponding concave- And a corresponding fastening portion is formed at a lower portion of the fastening separating portion so as to be elastically coupled to the shaft hole of the fixture.

According to the present invention, it is possible to provide a fastening / dismounting unit comprising a fastening / disassembling unit comprising a fixed body and a concave / convex portion having an inclined surface for fastening / detaching the abutment, and a corresponding inclined surface on a corresponding abutment And a corresponding fastening / separating portion formed of the corresponding concave / convex portion is formed. The shape of the concave / convex portion can be formed in various shapes.

Therefore, when the implant user chews the food, the stress applied to the abutment by the chewing pressure is more effectively dispersed on the fixture due to the wider contact area between the fixture and the abutment, so that excessive load is concentrated on the fixture or the abutment point When separating the abutment from the fixture, it is possible to easily separate the abutment by rotating the abutment against the fixture instead of separating the abutment from the fixture by pulling it away.

As described above, according to the present invention, in the process of separating the abutment from the fixture, it is possible to easily separate without using a complicated removal device such as a separate fryer, so that the injury or pain of the patient can be greatly reduced, It is possible to obtain an improved excellent effect for easy execution.

Further, when the rotational force is not less than a predetermined value, the concavo-convex portion and the corresponding concavo-convex portion also have a function of preventing the rotation of the abrasion zone, so that a separate angular shape for preventing rotation of the abrasion- Since the abutment portion which is axially coupled to the inner surface of the shaft hole and the inner surface of the shaft of the fixture can be curved not in the form of an angle, it is possible to prevent the stress from concentrating excessively on one side when receiving the lateral occlusal force.

FIG. 1 is a cross-sectional view showing a structure in which, in an implant unit having a conventional elastic fastening leg coupling structure, an artificial tooth inserted into a shaft hole of a fixture is in contact with a flat surface without a concavo-convex portion on the upper circumferential surface of the fixture.
FIG. 2 is an exploded perspective view of a dental implant according to the present invention, showing a configuration in which a concave / convex portion having an inclined surface for fastening separation is provided on an upper end surface where the fixture and the abutment are in contact with each other.
FIG. 3A is a cross-sectional view showing the action of the abutment stress dispersed widely by the wider contact surface area on the fixture through the irregularities in the dental implant according to the present invention.
FIG. 3B is a cross-sectional view showing the action of rotating the abutment against the fixture to ascend and separate through the inclined surface and the corresponding inclined surface, instead of separating the abutment from the fixture in the vertical direction, in the dental implant according to the present invention.
4 is an exploded perspective view showing a structure in which recesses and protrusions are formed through concave grooves formed in the middle rim of the abutment and protrusions protruding upward from the upper surface of the fixture in the dental implant according to the present invention.
FIG. 5A is a sectional view showing a protruding portion of a triangular cross-section having a corresponding inclined surface protruding downward from the middle edge of the abutment and a concave portion formed by a triangular cross-sectional concave groove formed on the upper surface of the fixture in the dental implant according to the present invention. to be.
FIG. 5B is an assembled cross-sectional view of a denture implant according to the present invention, showing a concave portion formed by a triangular cross-section formed in a middle rim of the abutment and a protruding portion formed by protruding from a top surface of the rigid body.
6A is a longitudinal sectional view showing a structure in which recesses and protrusions are formed at two positions along the periphery of the top surface of a fixture in contact with a fixture in the dental implant according to the present invention.
FIG. 6B is a plan view showing a structure in which, in the dental implant according to the present invention, the concavo-convex portion is formed at two positions along the circumference of the top surface where the fixture and the abutment are in contact with each other.
FIGS. 7A to 7C are plan views showing a structure of a dental implant according to the present invention, in which the concavo-convex portion is formed at two, four, and eight positions along the circumference of the top surface where the fixture and the abutment are in contact;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description and drawings, the elastic coupling structure of the elastic locking leg type will be described by way of example. However, those skilled in the art will understand that the elastic coupling structure, It will be appreciated that the present invention may be applied or applied. That is, the following description will be made on the basis of the elastic locking leg type, but it is for convenience of explanation and is not intended to limit the scope of the present invention.

2, the dental implant 100 according to the present invention includes a fixture 110 coupled to an alveolar bone and an abutment 120 resiliently axially coupled to the shaft hole of the fixture 110 And a concave and a convex portion 140a having an inclined surface 142 for engaging and disengaging the concave and convex portion 140a on the upper surface 130 of the fixed body where the fixture 110 is in contact with the abutment 120, And a corresponding engaging / disengaging portion formed of a corresponding concave / convex portion 140b having a corresponding inclined surface 152 at an abutment portion.

The corresponding fastening / separating portion and fastening / separating portion may include a protrusion 152a protruding downward from the middle edge of the abutment 120, and a protrusion 152b protruding downward from the center of the fastener body 110 And a concave groove 152b formed to be engaged at the top surface. The protrusion 152a may have a round cross section, a triangular cross section, a trapezoid cross section, or the like having an inclined surface, and the concave groove 152b may have a shape corresponding to each cross section of the protrusion. Of course, it is also obvious that the protruding portion 152a may be formed in various shapes having not only the above-mentioned cross-section but also inclined surfaces.

3A, when the user chews food, the stress applied to the abutment 120 by the chewing pressure is applied to the upper surface of the fixture 110 So that it is widely dispersed by the surface area widened in the concave and convex portions 140.

3B, when separating the abutment 120 from the fixture 110 during the one-prosthetic procedure, the dental implant 100 according to the present invention is configured to separate the abutment 120 from the fixture 110 The abutment 120 can be rotated relative to the fixture 110 to lift and separate the incline 142 and the corresponding incline 152 through the corresponding incline 152, instead of pulling it apart vertically, as shown by the arrows .

That is, instead of vertically pulling the abutment 120 from the fixture 110 by using a difficult-to-handle extraction mechanism such as a pliers, the abutment 120 is fixed to the fixture 110 by a handy mechanism such as a rotary screwdriver The corresponding fastening / separating portion rotates and pushes up the abutment 120 with respect to the fixture 110 vertically by the height of the inclined surface through the inclined surface 142 and the corresponding inclined surface 152. That is, the abutment is vertically pushed up more easily by changing the rotational force to the normal force through the inclined surface and the corresponding inclined surface.

When the abutment is raised by the inclined surface height with respect to the fixture 110 as described above, the resilient engagement leg 122 of the abutment 120 is engaged with the engagement protrusion 124 of the lower end of the abutment 120 by the engagement recess 126 of the fixture 110, So that the abutment 120 can be easily detached from the fixture 110. As a result, At this time, it is preferable to form a groove or a vertical cut surface in the abutment portion of the abutment upper prosthesis so that the rotation driver can be placed on the abutment.

As described above, in the process of separating the abutment 120 from the fixture 110, it is possible to easily separate the abutment 120 without using a difficult-to-use extraction mechanism such as a separate plier, thereby greatly reducing the injury or pain of the patient And the practitioner can easily perform the implant treatment.

4, the corresponding fastening / separating portion and the fastening / separating portion have a concave groove 152b formed in the middle rim of the abutment 120, and a concave groove 152b formed in the middle rim of the abutment 120. In the dental implant 100 according to the present invention, And a protrusion 152a protruding upward to engage with the upper end surface of the fixing body 110 in correspondence with the protrusion 152b.

3A, when the user chews food, stress applied to the abutment 120 by the chewing pressure is applied to the fixture 110, as shown in FIG. 3A, 3B, when the abutment 120 is detached from the fixture 110 during the implanting procedure, the abutment portion 120 is separated from the fixture 110 by the surface area expanded in the recessed portion 140 on the abutment portion 140, The abutment 120 may be rotated with respect to the fixture 110 so that the abutment 120 can be ascended and separated from the inclined surface through the corresponding inclined surface instead of being pulled out in the vertical direction.

5A, the corresponding fastening / separating portion and the fastening / separating portion have inclined surfaces 142 protruding downward from the middle rim of the abutment 120. In the dental implant 100, A protruding portion 156a having a triangular cross section and a concave groove 156b having a triangular cross section formed at the upper edge of the fixing body 110 corresponding to the protruding portion 156a of the triangular cross section. 5B, the fastening / separating portion and the corresponding fastening / separating portion may have a triangular cross-sectional concave groove 156b formed in the middle rim of the abutment 120, and a triangular cross-sectional concave groove 156b corresponding to the triangular cross- And a protruding portion 156a having a triangular cross section having an inclined surface 142 protruding upward to engage with the upper surface of the fixing body 110. [ 3A, the stress applied to the abutment 120 is not affected by the stress applied to the abutment 120. Therefore, even when the recessed portion 140 is formed by the triangular-section recessed groove 156b and the triangular-sectioned projection 156a, 3B, the abutment 120 can be widely dispersed by the surface area widened by the concave and convex portions 140 on the fixed body 110. Instead of separating the abutment 120 from the fixed body 110 by pulling it vertically, , The same operation and effect of rotating the abutment 120 with respect to the fixture 110 can be obtained. Likewise, it is apparent that the same function and operation effect is obtained even when the projection has a round or trapezoidal cross section.

In the structure of the dental implant 100 according to the present invention, the fastening / separating portion and the corresponding fastening / separating portion are formed along the circumference of the upper surface 130 of the fixture in contact with the fixture 110 and the abutment 120 At least two portions may be formed.

6A and 6B, the concave and convex portions 140 may be formed at two positions along the circumference of the top surface 130 of the fixture in contact with the fixture 110 and the abutment 120. In other words, have.

Alternatively, as shown in FIG. 7A, the concavities and convexities 140 may be formed at three positions in the circumferential direction at equal intervals along the circumferential surface 130.

7B and 7C, the concavities and convexities 140 may be formed at four or eight places in the circumferential direction at equal intervals along the circumferential surface 130. [ At this time, the contact surface between the fixed body on which the fastening / separating portion and the corresponding fastening / separating portion are formed and the abutment surface may be inclined rather than horizontal.

The concave and convex portion 140 may be formed at least at two positions along the upper end surface 130 of the fixture in contact with the fixture 110 and the abutment 120. Through such structures, When the food is chewed, the stress applied to the abutment 120 by the chewing pressure is more effectively dispersed on the fixture 110, so that it is possible to reduce the excessive load applied to the fixation leg 122, When the abutment 120 is separated from the fixed body 110, the abutment 120 can be easily rotated by rotating it.

As described above, according to the present invention, in the process of separating the abutment 120 from the fixture 110, it is possible to easily separate without using a take-out mechanism such as a separate pliers, And the implant procedure can be easily performed.

Although the present invention has been described in detail with reference to specific embodiments thereof with reference to the accompanying drawings, the present invention is not limited to such specific structures. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the following claims. For example, although the fastening / separating portion is formed on the upper surface 130 of the fixture in contact with the fixture 110 and the abutment 120, the fixture 110 ) May be provided as a different shape and a different structure on the circumferential surface at a certain position in the vertical direction in the axial hole side. However, it is intended that the present invention covers all such modifications and changes as fall within the true scope of the invention.

1: an implant unit having an elastic fastening leg engagement structure
10: fixture 20: abutment
122, 22: elastic fastening leg 100: dental implant
110: fixed body 120: abutment
130: upper surface 140a: concave /
140b: corresponding concave-convex portion 142:
152: corresponding inclined surface 152a:
152b: concave groove 156a: protrusion of triangular section
156b: Concave groove of triangular section

Claims (9)

A dental implant comprising a fixed body coupled to an alveolar bone and an abutment for resiliently axially coupling to the shaft hole of the fixed body,
Wherein a fastening / separating portion is formed of a top surface of a fixture in contact with the fixture and a peripheral surface of the fixture, and a concave / convex portion having an inclined surface for fastening / separation on a circumferential surface at a predetermined position in a vertical direction of the inner surface of the fixture, A corresponding engagement / disengagement portion composed of a corresponding recessed portion having a corresponding inclined surface is formed on the peripheral surface of the abutting portion in contact with the separating portion so that the stress applied to abutment by the abutting pressure is dispersed widely on the abutting portion, Wherein the abutment is rotated with respect to the fixture so that the abutment is separated from the inclined surface of the joint separating portion through a corresponding inclined surface of the corresponding joint separating portion, instead of pulling the abutment from the fixture in the vertical direction. [2] The dental implant according to claim 1, wherein the abutment is elastically axially coupled to the shaft hole of the fixture by an elastic fastening leg or an elastic fastening piece. [3] The apparatus according to claim 1, wherein the corresponding fastening / separating portion and the fastening / separating portion are each formed by a protrusion protruding downward from the intermediate rim of the abutment and a recess formed in the upper surface of the fixture corresponding to the protrusion Dental implants. 2. The apparatus according to claim 1, wherein the corresponding fastening / separating portion and the fastening / separating portion are each formed by a concave groove formed in the middle rim of the abutment and a protruding portion protruding upward from the upper surface of the fastener body corresponding to the concave groove . 5. The dental prosthesis according to claim 3 or 4, wherein the projecting portion has a round cross section, a triangular cross section or a trapezoidal cross section having an inclined surface, and the concave groove has a shape corresponding to a cross section of the projecting portion, respectively Implant. The dental implant according to any one of claims 1 to 4, wherein the fastening / separating portion and the corresponding fastening / separating portion are formed at least at two positions along the periphery of the upper surface where the fastener is in contact with the abutment. The dental implant according to any one of claims 1 to 4, further comprising an engaging portion for engaging with the driver when the alveolar bone is placed on the inner surface or the bottom surface of the shaft hole of the fixture. A fixture for a dental implant, wherein the fixture is bonded to the alveolar bone and is elastically bonded to the alveolar bone,
A coupling and separating portion formed of a top surface of the fixed body in contact with the abutment, or a concave-convex portion having an inclined surface for engaging and disengaging is formed on a circumferential surface at a predetermined position in the vertical direction of the inner surface of the shaft hole of the fixed body, Wherein a fastening portion for fastening the abutment portion is formed on the fastening portion of the dental implant. An abutment for a dental implant, which is elastically coupled to a shaft hole of a fixture coupled to the alveolar bone,
And a corresponding fastening / disengaging portion formed of a corresponding concave / convex portion having a corresponding inclined surface at a portion corresponding to the fastening / separating portion of the fixed body is formed, and a corresponding fastening portion for fastening the fastening / Abutments for dental implants.

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