KR102234741B1 - Double internal cold-welding implant - Google Patents

Abstract

The present invention relates to dental implants and, more specifically, to a double internal cold welding implant having a non-threaded coupling that can fundamentally solve the loosening phenomenon of the abutment coupled to the fixture, which is a chronic problem of existing implants. The fixture comprises: a body in which a screw is formed on the outer surface; a main cold welding groove portion formed to have a circular cross-section of which the inner diameter is reduced to a predetermined depth from the top surface along the central axis of the body; a polygonal groove portion formed to a predetermined depth in the shape of an upper-wide-lower narrow in succession to the main cold welding groove portion; and an auxiliary cold welding groove portion formed to have a circular cross-section in which the inner diameter of a predetermined depth is decreased in succession to the polygonal groove portion downward. The abutment comprises: a coupling protrusion that is inserted into the auxiliary cold welding groove portion to form weak cold welding; a seating surface portion to be seated on the polygonal groove portion above the coupling protrusion portion; a cold welding post formed on the seating surface portion to be fitted into the main cold welding groove to form strong cold welding; a crown connection portion protruding to the upper portion of the cold welding post.

Description

Double internal cold-welding implant

The present invention relates to a dental implant, but to a double internal cold welding implant having a non-screw connection that can fundamentally solve the screw loosening phenomenon of an abutment coupled to a fixture, which is a chronic problem of existing implants. It's about technology.

Dental implants are largely classified into two-piece and one-piece types, and one-piece and two-piece implants are selectively used because of their advantages and disadvantages.

The conventional one-piece and two-piece implants will be outlined.

1 shows a cross-sectional view of a conventional two-piece type implant, and FIG. 2 is a cross-sectional view of a conventional one-piece type implant.

First, in the two-piece type implant (A), the fixture 10 and the abutment 20 are separated, and the fixture 10 and the abutment 20 are used using the abutment screw 30. ) To be fastened. More specifically, a female screw 12 for fastening the abutment screw 30 is formed deeper than the abutment insertion groove 11 and the abutment insertion groove 11 from the upper center of the fixture 10 downward.

On the other hand, the lower end of the abutment 20 can be fitted into the abutment insertion groove 11, and the abutment screw insertion port 21 is formed to be opened from the upper end toward the lower end.

After inserting the lower end of the abutment 20 into the abutment insertion groove 11 of the fixture 10, the fixture 10 and the abutment 20 are fastened using the abutment screw 30. , In the small-diameter abutment screw 30, loosening of the abutment screw 30 occurs due to fatigue and poor fastening over time, and the end abutment screw 30 is broken and its function There was a problem of losing money.

On the other hand, in the one-piece implant (B), the fixture 10 and the abutment 20 are integrally formed.After the procedure on the alveolar bone, the abutment 20 protrudes more than 7 mm from the patient's gums. There is a problem in that the impact is easily applied to the protrusion 120 while the tongue or food is ingested, so that the initial fixation time of the implant is delayed due to microscopic shaking and may cause the initial fixation to fail.

In addition, the one-piece implant (B) is provided in a form where the abutment 20 protrudes long vertically since the abutment 20 is integrally formed with the fixture 10. In order to match the PATH with the teeth, the PATH with the adjacent teeth was matched by applying a mechanical force to the boundary between the fixture 10 and the abutment 20 to bend at a predetermined angle. As the one-piece implant (B) was forcibly bent and used, it caused insufficient esthetics and reduced mastication ability, and fatigue was easily accumulated in the forcibly bent area, causing frequent fracture.

Korean Patent Registration No. 10-1779980

Accordingly, in the present invention, it is intended to provide a double internal cold welding implant capable of expanding the advantages of a one-piece type implant and a two-piece type implant and supplementing the disadvantages.

In other words, the fixture and the abutment are in a separate form, but it is intended to solve the problem of loosening or breaking the abutment through non-screw coupling, and to provide a more diverse shape of abutment depending on the patient. do.

In addition, in the present invention, it is intended to further improve the bonding force by allowing cold welding to be formed in two places while changing positions.

The double internal cold welding implant of the present invention for achieving the object as presented is an implant comprising a fixture and an abutment, wherein the fixture includes: a body having a screw formed on an outer surface thereof; A main cold welding groove formed to have a circular cross-section whose inner diameter is reduced from an upper surface to a predetermined depth along a central axis of the body; A polygonal groove formed in a predetermined depth in the shape of an upper and lower narrow side in succession to the main cold welding groove; Including; a secondary cold welding groove formed to have a circular cross-section in which the inner diameter of a predetermined depth is reduced downwardly in succession to the polygonal groove,

The abutment may include a coupling protrusion configured to form weak cold welding while being fitted into the auxiliary cold welding groove; A seating surface portion seated in the polygonal groove portion above the coupling protrusion portion; A cold welding post formed on the seating surface to be inserted into the main cold welding groove to form strong cold welding; And a crown connection part protruding above the cold welding post.

Preferably, when the fixture is placed in the alveolar bone, the upper surface of the fixture is positioned parallel to the upper end of the gum to be used as a tissue level.

Preferably, when the fixture is placed in the alveolar bone, the upper surface of the fixture is positioned parallel to the upper end of the alveolar bone to be used as a bone level.

Preferably, the abutment is characterized in that it is a customized abutment processed based on the patient's tooth information.

Preferably, a connection tab portion is formed in a downward direction in succession to the auxiliary cold welding groove portion to allow the healing abutment to be coupled to the connection tab portion.

Preferably, the polygonal groove is characterized in that it is a square, a pentagon, a hexagon, a heptagon, an octagon, a sphere, and a decagon.

Preferably, the crown connection part is characterized in that it forms a left-right symmetrical shape or a left-right asymmetric shape.

Preferably, the screw has a rectangular screw shape, but the upper surface of the thread is horizontal, and the lower surface of the thread is formed of an inclined surface having an inclination angle of 10 to 15° and a horizontal surface having a thick thickness while forming a boundary between the inclined surface and the inclined surface. It is characterized.

Preferably, the height of the boundary jaw is characterized in that the range of 0.05 ~ 0.5mm.

According to the double internal cold welding implant according to the present invention, there is an effect that the fixture and the abutment can be simply coupled without using a screw at all.

In addition, in the present invention, by combining the abutment in a cold welding method, even if time elapses, the bonding force is not damaged, so that the possibility of occurrence of defects may be reduced.

In addition, since polygonal grooves are formed in the fixture in the present invention, it is possible to provide rotational force by inserting the jig into the polygonal groove when placing the fixture, thereby making the treatment easier.

1 is a cross-sectional view of a conventional two-piece type implant.
Figure 2 is a cross-sectional view of a conventional one-piece type implant.
3 is a cross-sectional view of a double internal cold welding implant according to the present invention.
Figure 4 is an exploded view of Figure 3;
5 is a plan view of the fixture.
6 is an exemplary view when a double internal cold welding implant according to the present invention is used as a tissue level.
7 is an exemplary diagram when a double internal cold welding implant according to the present invention is used at this level.
Fig. 8 is an exemplary view in the case of having a symmetrical shape as the shape of various abutments.
9 is an exemplary view of an abutment having an asymmetric shape.
10 is an enlarged view of a screw thread applied to the fixture of a double internal cold welding implant according to the present invention.
11 is an exemplary view when a connection head is further provided on the top surface of the abutment.
12 is an exemplary view of applicable polygonal grooves applicable to a double internal cold welding implant according to the present invention.
13 is an exemplary view of a premilled abutment.
14 is an exemplary view of a customized abutment manufactured using the premilled abutment of FIG. 13.
15 is an exemplary view showing that a connection tab portion is formed on a fixture to fasten a healing abutment.

Hereinafter, a more detailed description of the present invention will be made with reference to the accompanying drawings, and the accompanying drawings show possible embodiments of the technical idea of the present invention.

3 is a cross-sectional view of a double internal cold welding implant according to the present invention, FIG. 4 is an exploded view of FIG. 3, FIG. 5 is a plan view of the fixture, and FIG. 6 is a double internal cold welding implant according to the present invention. It is an exemplary diagram when used as a tissue level, FIG. 7 is an exemplary diagram when a double internal cold welding implant according to the present invention is used at this level, and FIG. 8 is a symmetrical shape as the shape of various abutments. 9 is an exemplary view of an abutment having an asymmetric shape, and FIG. 10 is an enlarged view of a screw thread applied to the fixture of a double internal cold welding implant according to the present invention, 11 is an exemplary diagram when a connection head is further provided on the upper surface of the abutment, FIG. 12 is an exemplary diagram applicable to a polygonal groove applicable to a double internal cold welding implant according to the present invention, and FIG. 13 is It is an exemplary view of a premilled abutment, and Fig. 14 is an exemplary view of a customized abutment manufactured using the premilled abutment of Fig. 13, and Fig. 15 is a healing abutment by forming a connection tab on the fixture. It is an exemplary diagram showing that can be fastened.

As shown, the double internal cold welding implant according to the present invention combines the advantages of a conventional one-piece type implant and a two-piece type implant.

3 or 4, the fixture 100 includes a body 110 having a screw 111, and a main cold welding groove having a circular cross-section whose inner diameter is reduced to a predetermined depth from the top surface along the central axis of the body 110 ( 120), and a polygonal groove portion 130 formed with a predetermined depth in the shape of an upper and lower narrow side in a downward direction following the main cold welding groove portion 120, and a circular cross-section in which the inner diameter of the predetermined depth decreases in succession to the polygonal groove portion 130 downward. An auxiliary cold welding groove 140 formed to have is provided.

The abutment 200 to be coupled to the fixture 100 includes a coupling protrusion 210, a seating surface 220, a cold welding post 230, and a crown connection part 240 from the lower end. The coupling protrusion 210 forming the lower end of the abutment 200 is a portion where weak cold welding is formed while being fitted into the auxiliary cold welding groove 140, and the seating surface portion 220 is a predetermined length above the coupling protrusion 210 The cold welding post 230 is formed on the polygonal groove portion 130 and is formed above the seating surface portion 220 to be inserted into the main cold welding groove portion 120 to form strong cold welding. The crown connection part 240 is formed to protrude above the post 230.

That is, in the present invention, the main cold welding groove 120 and the auxiliary cold welding groove 140 are provided in the fixture 100 so that cold welding can be combined at two different locations.

A main cold welding groove part 120 is formed from the top surface to a predetermined depth along the central axis of the body 110, and the main cold welding groove part 120 is a part forming a circular cross-section whose inner diameter decreases downward, and the main cold welding The inclination angle of the groove 120 is set to have an inclination angle of about 1.5°, and the depth of the main cold welding groove 120 is set to be about 0.5 ~ 5mm.

The outer circumferential surface of the cold welding post 230 of the abutment 200 to be described later in the vicinity of the upper end of the main cold welding groove 120 is cold-welded by pressing force, and the cold welding with the main cold welding groove 120 The post 230 forms a strong cold welding bonding force. As the cold welding post 230 in the main cold welding groove 120 achieves a strong cold welding coupling, the bonding boundary between the fixture 100 and the abutment 200 is completely sealed. ), it is possible to increase the durability of the implant and prevent the occurrence of various inflammations and odors.

Polygonal grooves 130 are formed at a predetermined depth in the shape of an upper gwanghyeop downward in succession to the main cold welding grooves 120, and the specific shapes of the polygonal grooves 130 are square, pentagonal, hexagonal, heptagonal, octagonal, as shown in FIG. It can be made of a spherical shape, a decagonal shape, etc. The shape of the polygonal groove 130 may be selected from a variety of possible implementations. In this embodiment, a hexagonal groove is formed by selecting a polygon of the polygonal groove 130 as a hexagon.

The seating surface portion 220 of the abutment 200 fitted into the polygonal groove portion 130 may have a polygonal shape corresponding to the polygonal groove portion 130, and the seating surface portion 220 may have a circular cross-section. . When the seating surface portion 220 inserted into the polygonal groove portion 130 has a circular cross-section, there is an advantage that the abutment 200 can be freely disposed in a desired direction by 360 degrees. In this embodiment, it is a hexagonal seating surface portion 220.

If the polygonal groove portion 130 is placed in the fixture 100 as in the present invention, a predetermined jig can be inserted into the polygonal groove portion 130 to transmit rotational force when the fixture 100 is placed, so there is an advantage that the procedure is simple.

If the fixture 100 itself does not have a part to which the jig can be connected, a hole was drilled in the alveolar bone using a drill, and then the fixture was placed in the hole and impact was applied downward to allow the fixture to be placed in the alveolar bone. Due to this, the patient was forced to feel considerable discomfort during the procedure, and there was also a problem that the fixture was placed in an incorrect position.

The auxiliary cold welding groove portion 140 formed in succession downward from the polygonal groove portion 130 of the fixture 100 has a circular cross-section whose inner diameter decreases toward a predetermined depth downward. The auxiliary cold welding groove part 140 is a part that forms a cold welding coupling force together with the main cold welding groove part 120, and a weak cold welding coupling force is formed in the auxiliary cold welding groove part 140, and the main cold welding groove part 120 In this, strong cold welding bonding force is formed. Here, the weak cold welding and the strong cold welding are relative values and mean that the bonding force formed in the main cold welding groove 120 is greater than the bonding force formed in the auxiliary cold welding groove 140.

Cold welding as used herein refers to a method of bonding by locally plastically deforming the bonding surface by strongly compressing the boundary of a ductile material at room temperature without applying heat or current from the outside. The fixtures and cap-type abutments constituting the hybrid implant according to the following are basically made of titanium and titanium alloys, but they are made of special plastics, zirconia, and special alloys. It can be made to be united.

The inclination angle of the main cold welding groove 120 is set to 1.5° to vary the cold welding coupling force formed in the main cold welding groove 120 and the auxiliary cold welding groove 140, and the inclination angle of the auxiliary cold welding groove 140 is Make it a value less than 1.5°. That is, the inclination angle of the auxiliary cold welding groove 140 is set to (1.5-α)°. Here, "α" has a positive value.

As described above, in the present invention, when a pressing force is applied to the abutment 200 to couple the abutment 200 to the fixture 100, cold welding at the same time in the main cold welding groove 120 and the auxiliary cold welding groove 140 While this is made, there is a characteristic that the coupling force made in the main cold welding groove part 120 is formed stronger than the coupling force made in the auxiliary cold welding groove part 140.

On the other hand, in the abutment 200, the crown connection part 240 protruding above the cold welding post 230 is a portion to which the crown 400, which is an artificial tooth, is coupled.

In addition, as shown in FIG. 15, in the double internal cold welding implant according to the present invention, the connection tab 150 may be further formed in a predetermined depth downward in succession to the auxiliary cold welding groove 140 as needed. The connection tab 150 means a female screw, and when a predetermined fixing time is to be given after the fixture 100 is placed in the alveolar bone, the healing abutment 300 is temporarily coupled to the fixture to prevent the inflow of foreign substances. For. That is, the connection tab 150 is only for connecting the healing abutment 300 to be temporarily coupled to the fixture 100, and is an element that is not used for the actual fastening of the abutment 200.

Meanwhile, the double internal cold welding implant according to the present invention can be used in both cases of a tissue level and a bone level.

As shown in FIG. 6, a screw 111 is formed on the outer surface from the lower end of the fixture 100 to a predetermined height, and the screw 111 is placed in the alveolar bone. The upper portion of the body 110 in which the screw 111 is not formed is positioned on the same line as the gum when it is implanted. In this way, when the upper end of the fixture 100 is placed on the same line with the gum or slightly higher, it is commonly referred to as a tissue level.

Meanwhile, when the fixture 100 is placed in the alveolar bone as shown in FIG. 7, the upper end of the fixture may be used in a submerged form in which the upper end of the fixture is formed in a position parallel to the upper end of the alveolar bone. That is, when the procedure is performed in a server-merged form, the upper surface of the body 110 of the fixture 100 may be positioned under the gum, so that a part of the abutment 200 can be performed in a form that is wrapped by the gum. . In this case, the fixture 100 is positioned lower than the gum and is placed, which is referred to as a bone level.

That is, the double internal cold welding implant of the present invention may select any one of the tissue level or this level when the fixture 100 is placed in consideration of the state of the patient's gums or alveolar bone.

In any case, after a predetermined period has elapsed after the fixture 100 is placed in the alveolar bone, the fixture 100 is sufficiently seated, and then the abutment 200 is placed in the main cold welding groove 120, the polygonal groove 130 and the auxiliary When the cold welding post 230 of the abutment 200 and the coupling protrusion 210 of the abutment 200 are inserted into the cold welding groove 140 and pressed downward, the main cold welding groove 120 of the fixture 100 and the auxiliary A strong coupling force is formed while causing local plastic deformation at the same time in the cold welding groove 140.

As described above, in the present invention, the combination of the abutment 200 and the fixture 100 is fastened by a cold welding method, which is a non-screw method, so that the procedure is easier and the abutment 200 is loosened or broken. Can be dramatically improved.

On the other hand, the crown connection part 240 is a part connecting the crown (prosthetic), and the crown connection part 240 is based on a left-right symmetrical structure, but the crown connection part 240 may have a left-right asymmetric shape if necessary. .

The crown connection part 240 can be subjected to various modifications as shown in FIG. 8 or 9, which is a straight type, a shoulder type, and an angle in order to match the PATH with other neighboring teeth in consideration of the patient's tooth condition, etc. angled) type, customized type abutment, etc. can be used appropriately.

In particular, a customized abutment, which is one of the abutments 200 applied to the present invention, refers to a customized abutment to provide the best implant to the patient, which is a premilled abutment based on the patient's tooth information. It refers to an abutment made by processing a pre-milled abutment with a multi-axis machine (5-axis machine).

13 is an exemplary diagram of a premilled abutment, and a customized abutment most suitable for a patient is manufactured using this, so that it can be combined with the fixture of the present invention in a cold welding method.

FIG. 14 is an exemplary view of a customized abutment manufactured using the premilled abutment of FIG. 13, and shows that when the left and right heights of the gums are different, the difference can be considered.

Next, another feature of the double internal cold welding implant according to the present invention will be described.

As shown in FIG. 10, a screw 111 is formed in the body 110 of the fixture 100 constituting the present invention, and the screw 111 is provided from the lower end of the body 110 to a predetermined height.

The screw 111 formed in the body 110 has a square screw shape, but the upper surface 111a-1 of the thread 111a is horizontal, and the lower surface 111a-2 of the thread 111a is 10 Try to achieve an inclination angle of ~ 15°.

In particular, the lower surface of the thread 111a-2 allows the inclined surface S and the horizontal surface H to be formed separately, and the horizontal surface H is formed to form a boundary jaw V so as to have a thickness greater than that of the inclined surface S.

That is, the angle of the inclined surface (S) is 10 to 15°, and the horizontal surface (H) protrudes downward while forming the boundary jaw (V) to have a thicker thickness than the inclined surface (S), but to be horizontal.

Preferably, the boundary jaw (V) forming the boundary between the inclined surface (S) and the horizontal surface (H) is made to form a height of 0.05 ~ 0.5mm. On the other hand, if the height of the boundary jaw (V) is too large, excessive resistance may occur during placement in the alveolar bone. Accordingly, in the present invention, it is limited to a maximum of 0.5 mm, and a horizontal surface (H) thicker than the inclined surface (S) on the lower surface of the thread By this formation, there is an advantage that it is possible to shorten the time during which the fixture 100 is fixed by the growth of the alveolar bone after being placed in the alveolar bone.

By providing an additional horizontal surface (H) thicker than the inclined surface (S), it is possible to reinforce the thread 111a, which has a high risk of damage. Since the thread 111a formed on the outer surface of the body 110 is formed by cutting, processing embrittlement occurs or may be very susceptible to damage due to residual stress. It is composed of an inclined surface (S) and a horizontal surface (H).

Next, another embodiment of the double internal cold welding implant according to the present invention will be described.

The present invention is characterized in that the column 250 and the connection head 260 connected to the upper end of the column 250 may protrude from the center of the top surface of the abutment 200 as shown in FIG. 11.

By allowing the column 250 to protrude at a predetermined height at the center of the upper surface of the abutment 200 and further forming a spherical or cylindrical connection head 260 on the column 250, the denture can be mounted. It is possible to increase the possibility of using the dove internal cold welding implant according to the invention.

As described above, the double internal cold welding implant according to the present invention can completely solve the problem of screw loosening and the abutment breakage by simply coupling the fixture and the abutment by cold welding instead of the screw fastening method. . In addition, the present invention has the advantage that the fixture can be accurately placed by applying a rotational force using a jig that is inserted into the polygonal groove when the fixture is placed in the alveolar bone by forming a polygonal groove in the fixture.

In addition, since the bonding is made at the boundary between the fixture and the abutment by strong cold welding bonding force, it is possible to reliably block foreign matter from entering the interior of the fixture, thereby preventing the occurrence of tooth damage and odor caused by foreign matter trapping.

The double internal cold welding implant according to the present invention is a technology that can be usefully used as an implant for fastening a fixture and an abutment in a non-screw coupling method.

100: fixture
110: body 111: screw
111a: thread 111a-1: upper surface
111a-2: Lower slope: S
Horizontal plane: H Boundary jaw: V
120: main cold welding groove 130: polygonal groove
140: auxiliary cold welding groove portion 150: connection tap portion
200: abutment
210: coupling protrusion 220: seating surface
230: cold welding post 240: crown connection
250: pillar 260: connection head
300: Healing Abutment

Claims (9)

In an implant consisting of a fixture and an abutment,
The fixture,
A body in which a screw is formed on an outer surface;
A main cold welding groove formed to have a circular cross-section whose inner diameter is reduced from an upper surface to a predetermined depth along a central axis of the body;
A polygonal groove formed in a predetermined depth in the shape of an upper and lower narrow side in succession to the main cold welding groove;
Including; an auxiliary cold welding groove formed to have a circular cross-section in which the inner diameter of a predetermined depth is reduced downwardly following the polygonal groove portion,
The abutment,
A coupling protrusion configured to form weak cold welding while being fitted into the auxiliary cold welding groove;
A seating surface portion seated in the polygonal groove portion above the coupling protrusion portion;
A cold welding post formed on the seating surface to be inserted into the main cold welding groove to form strong cold welding;
And a crown connection part protruding above the cold welding post. The method of claim 1,
When the fixture is placed in the alveolar bone, a double internal cold welding implant, characterized in that the upper surface of the fixture is positioned parallel to the upper end of the gum and used as a tissue level. The method of claim 1,
When the fixture is placed in the alveolar bone, the upper surface of the fixture is positioned parallel to the upper end of the alveolar bone to be used as a bone level. The method of claim 1,
The abutment,
A double internal cold welding implant, characterized in that it is a customized abutment processed based on the patient's tooth information. The method of claim 1,
A double internal cold welding implant, characterized in that a connection tab is formed in the auxiliary cold welding groove in a downward direction to allow the healing abutment to be coupled to the connection tab. The method according to any one of claims 1 to 5,
The polygonal groove portion,
Double internal cold welding implants characterized by such things as square, pentagonal, hexagonal, heptagonal, octagonal, spherical, and decagonal. The method according to any one of claims 1 to 5,
The crown connection part,
A double internal cold welding implant, characterized in that it forms a left-right symmetrical shape or a left-right asymmetric shape. The method according to any one of claims 1 to 5,
The screw,
It has a square screw shape, but the upper surface of the thread is horizontal,
The double internal cold welding implant, characterized in that the lower surface of the thread is formed of an inclined surface having an inclination angle of 10 to 15° and a horizontal surface having a thick thickness while forming a boundary jaw with the inclined surface. The method of claim 8,
Double internal cold welding implant, characterized in that the height of the boundary jaw is in the range of 0.05 ~ 0.5mm.

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