KR20200107266A - Dental implant - Google Patents

Abstract

Disclosed is a dental implant. The dental implant of the present invention comprises: a fixture that is placed in a gum bone; an abutment including an insertion part inserted into a fastening groove of the fixture, a protrusion part protruding upward of the fixture, and a penetration hole penetrating the insertion part and the protrusion part, wherein the protrusion part is provided with a plurality of cut-out holes spaced apart from each other along a circumferential direction so that the protrusion part can expand outward by an external force to a predetermined degree or more, and a first screw thread is formed on the inner circumferential surface thereof; an artificial tooth coupled to the protrusion part so as to surround the outside of the protrusion part of the abutment; a first fixing screw that is inserted into the penetration hole and has one end coupled to the fixture to fix the abutment with respect to the fixture; and a second fixing screw having a second screw thread formed to be screwed into the first screw thread of the abutment so as to expand the protrusion part outward, and fixing an artificial tooth with respect to the abutment by being inserted into the artificial tooth. According to the present invention, it is possible to increase the bonding strength between the abutment and the artificial tooth by having multiple protrusion parts of the abutment spaced apart in the circumferential direction, and screwing the second fixing screw therein so as to expand the protrusion parts by the tensile force generated thereby and allow the protrusion parts to be in close contact with the inner surface of the artificial tooth.

Description

Dental implant{DENTAL IMPLANT}

The present invention relates to a dental implant, and more particularly, when bonding an artificial tooth to an abutment, it can be mutually bonded without using a bonding bond using an adhesive, and by increasing the mutual bonding force between the abutment and the artificial tooth It relates to a dental implant that can improve durability.

An implant is an artificial tooth that is implanted into the alveolar bone when the tooth is lost or lost. The procedure using implants is expanding because it is possible to perform only on the lost or lost teeth without damaging the teeth adjacent to the lost or lost teeth. In general, implants are composed of a fixture that is placed in the alveolar bone, an abutment that is fixed to the fixture by a screw, and an artificial tooth (crown) that is covered with the abutment to form the appearance of the implant.

Among the components of the implant, the abutment transmits the load applied through the artificial tooth to the artificial tooth root, that is, the load to the jawbone. For this purpose, when processing the abutment, the size, shape and shape of the artificial tooth The outline should be considered, and in addition, the occlusion with the surrounding teeth and opposing teeth (upper or lower teeth), the condition of the gums, and the gum line should all be reflected.

Therefore, the abutment is being customized through a computer aided design (CAD) or computer aided manufacturing (CAM) system in consideration of the individual characteristics of the patient.

On the other hand, until recently, the abutment has a fatal problem in that it is impossible to remove/separate when post-correction is required, since it relies on a bonding treatment using an adhesive for integrating with an artificial tooth.

In other words, after the artificial tooth is placed, the appropriate angle, shape, and height compared to other teeth are inspected.According to the inspection result, whether or not the artificial tooth needs to be corrected is determined.For example, if correction is required, it is appropriate for artificial tooth processing. Even though the abutment must be separated, it is impossible to separate it due to bonding. In order to supplement this, Patent Document 1 is disclosed. In Patent Document 1, it is disclosed that the coupling portion is configured with an outer diameter that is formed to expand by 001 to 01% compared to the inner diameter of the inlet hole of the upper prosthesis, but the expansion of the outer diameter of the coupling portion is not variable and has a fixed state. If the implant user uses it for a long time, there is a problem in that the bonding force between the coupling part and the prosthesis may be weakened.

Korean Registered Patent Publication No. 10-1768410 (registered on August 8, 2017)

The present invention was conceived to solve the above-described conventional problem, and when the artificial tooth and the abutment are combined with each other, the outer diameter of the abutment is relatively further expanded compared to the initial state before the procedure. It is an object of the present invention to provide a dental implant capable of increasing the bonding force between the artificial tooth and the abutment after the procedure compared to the prior art.

In addition, another object of the present invention is to provide a dental implant capable of improving overall durability by increasing mutual bonding between an abutment and an artificial tooth.

In addition, the present invention is to provide a dental implant that can further prevent the occurrence of cracks and the like due to the concentration of a load on the contact area between the artificial tooth and the implant as the vertical/lateral external force acts on the artificial tooth. The purpose.

In addition, another object of the present invention is to provide a dental implant capable of sufficiently maintaining airtightness without performing a separate cement bonding operation on a contact site between an artificial tooth and an abutment.

According to an aspect of the present invention, a fixture to be placed in the gum bone; An insertion part inserted into the fastening groove of the fixture, a protrusion protruding upwards of the fixture, and a through hole penetrating the insertion part and the protrusion, and the protrusion extends its circumferential direction so that it can be extended outward by an external force. Accordingly, a plurality of cut-out holes are provided to be spaced apart from each other, and a first thread is formed on an inner circumferential surface thereof; An artificial tooth coupled to the protrusion to surround the outside of the protrusion of the abutment; A first fixing screw that is inserted into the through hole and has one end coupled to the fixture to fix the abutment with respect to the fixture; And a second fixing screw that is screwed to the first thread of the abutment and has a second thread formed to expand the protrusion outward, and is inserted into the artificial tooth to fix the artificial tooth with respect to the abutment. There is provided a dental implant comprising a.

A coupling protrusion may be provided on an outer peripheral surface of an upper end of the protrusion of the abutment, and a coupling groove may be provided in the artificial tooth so that the coupling protrusion can be inserted.

The coupling protrusion may have a semicircular, semi-elliptical, or triangular cross-sectional shape, and the coupling groove may have a cross-sectional shape corresponding to the coupling protrusion.

When the coupling protrusion has a triangular cross-sectional shape, the coupling protrusion may have a sectional area gradually enlarged toward the end of the abutment.

The coupling protrusion may be formed continuously along the circumferential direction of the protrusion or may be formed in plural to be spaced apart from each other.

The protrusion of the abutment includes a support portion having an expanded cross-sectional area to support the artificial tooth from a lower side and an insertion portion that can be inserted into the artificial tooth, and a cross-sectional area gradually expands toward one side at the connecting portion of the support portion and the insertion portion. A first taper part may be provided so as to be possible, and a second taper part may be provided on the artificial tooth to make an interview with the first taper part.

The protrusion of the abutment includes a support part having an expanded cross-sectional area to support the artificial tooth from a lower side, and a tooth insertion part that can be inserted into the artificial tooth, and the artificial tooth and the abutment between the support part and the artificial tooth A gasket may be further provided for maintaining airtightness therebetween.

The through hole includes a first through hole provided at a position corresponding to the insertion part and a second through hole provided at a position corresponding to the protrusion, and the inner surface of the second through hole is continuous along a circumferential direction thereof. A first inclined surface is provided, and a second inclined surface is continuously provided along the circumferential direction so that surface contact with the first inclined surface is possible on the outer surface of the head of the first fixing screw, and the inclination angle of the second inclined surface is 1 It may be larger than the inclination angle of the inclined surface.

According to the dental implant of the present invention described above, the protrusions of the abutment are composed of a plurality of spaced apart in the circumferential direction, and the protrusions are expanded by the tensile force generated when the second fixing screw is screwed to the inside of the abutment. By making it close to the inner surface of the tooth, it is possible to increase the bonding force between the abutment and the artificial tooth.

In addition, by providing a coupling protrusion and a coupling groove structure on the abutment and the artificial tooth, it is possible to increase mutual coupling force, and a first tapered portion is provided so that the cross-sectional area gradually expands toward one side at the connection portion of the support and insertion portion. By providing the second tapered portion so as to make an interview with the first tapered portion, the load is concentrated by an external force in the vertical/lateral direction to further prevent cracks from occurring in the abutment area, thereby increasing durability.

In addition, by adding a gasket between the support part and the contact surface of the artificial tooth, it is possible to improve airtightness performance and sufficiently airtightness without cement bonding.

In addition, by adopting a structure in which the first outer extension of the protrusion is made through the fastening of the first fixing screw and the second outer extension of the protrusion is made through the fastening of the second fixing screw, the outer extension of the protrusion over the second time Through this, close contact between the outer surface of the protrusion and the inner surface of the artificial tooth can be maintained, thereby maintaining a solid bonded state.

1 is a cross-sectional view showing a state in which a dental implant according to a first embodiment of the present invention is installed,
Figure 2 is an exploded perspective view of the dental implant according to the first embodiment of the present invention,
3 is an exploded cross-sectional view of the dental implant according to the first embodiment of the present invention,
4 is a cross-sectional view showing a state in which an abutment, an artificial tooth, and a fixing screw are combined in a dental implant according to a first embodiment of the present invention;
5 is an exploded cross-sectional view of a dental implant according to a second embodiment of the present invention,
6 is a cross-sectional view showing a coupled state in a dental implant according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms. It is provided to inform you. In the drawings, the same reference numerals refer to the same elements.

The dental implant according to a preferred embodiment of the present invention does not use a cement bonding method when bonding an artificial tooth and an abutment to each other, and not only can firmly fix the artificial tooth to the abutment, but also finally In the process of attaching the artificial tooth to the abutment before fixing the artificial tooth by screwing it together, it is possible to improve the economical efficiency of the procedure by adopting a structure that allows the artificial tooth to be fixed in position in the horizontal direction quickly.

In addition, the dental implant according to the embodiment of the present invention adopts a structure in which the outer surface of the abutment can be in close contact with the inner surface of the artificial tooth through screw fastening that fixes the artificial tooth to the abutment. Durability can be improved by increasing the sense of unity between the and artificial teeth, and shaking of the artificial teeth can be prevented even after a long period of use.

Hereinafter, the present invention will be described in detail with reference to various embodiments.

1 to 3, the dental implant according to the first embodiment of the present invention includes a fixture 100, an abutment 110, an artificial tooth 120, a first fixing screw 130, and It includes a second fixing screw 140.

First, the fixture 100 is placed in a gingival bone (alveolar bone) through a helical coupling method to serve as a structure supporting the abutment 110 and the artificial tooth 120 as a whole. A fastening groove 101 is provided inside the fixture 100.

The fastening groove 101 is provided in a relatively lower area, a first fastening groove 102 provided with a thread to be screwed with the first fixing screw 130, and a fixture provided in the upper area of the first fastening groove 102 (100) In order to prevent rotation of the abutment 110 when the end of the abutment 110 is inserted into the inside, for example, a second fastening groove made of a polygonal cross-sectional shape such as a square, pentagonal, hexagonal, octagonal, etc. 103).

Next, the abutment 110 is a part that is coupled to the fixture 100 to firmly support the artificial tooth 120, and the insertion part 111 and the fixture inserted into the fastening groove 101 of the fixture 100 (100) It includes a protrusion 112 protruding upward.

Here, as shown in Figs. 2 and 3, the protrusion 112 of the abutment 110 has a support 113 having an expanded cross-sectional area so as to support the artificial tooth from the lower side, and can be inserted into the artificial tooth. It includes a tooth insertion portion 114.

In addition, a through hole 115 is provided along the length direction to penetrate the insertion part 111 and the protrusion 112, and the first fixing screw 130 is inserted into the through hole 115 and screwed to the fixture 100 By being fixed through, the abutment 110 is firmly fixed to the fixture 100.

Meanwhile, in the embodiment of the present invention, when the first fixing screw 130 is inserted into the through hole 115 and the abutment 110 is coupled to the fixture 100, the outer surface of the protrusion 112 is in an initial state ( Compared to (before the fastening screw), it is relatively more extended outward, that is, a more open state.

Although it will be described in more detail below, the present invention adopts a structure in which the protrusion 112 can be extended further outward through the fastening of the second fixing screw 140 to be described later with the abutment 110, and the extended protrusion As the outer surface of 112 can be more closely attached to the inner surface of the artificial tooth 120, the artificial tooth 120 can be fixed with respect to the abutment 110 without a gap to achieve a solid coupling state.

2 and 3, a plurality of cutout holes 116 are provided in the protrusion 112 to be spaced apart from each other along the circumferential direction thereof, and the outer surface of the protrusion 112 is expanded through the cutout holes 116 This becomes possible to implement more easily.

As the protrusion 112 is made of a plurality of protrusion pieces spaced apart from each other by a plurality of cut-out holes 116, it can be extended outward by an external force for a certain amount or more, and a second fixing screw 140 on the inner peripheral surface of the protrusion 112 A first thread 117 is formed for fastening with.

On the other hand, it is preferable that the lower portion of the abutment 110 inserted into the fixture 100 has a polygonal shape such as a square, hexagonal, octagonal angle, etc. to prevent rotation, and the protrusion 112 protruding outward has an overall interior It can be made in an empty circular shape.

2 to 4, in the embodiment of the present invention, the first taper so that the cross-sectional area gradually expands toward one side at the connection part between the support part 113 of the abutment 110 and the tooth insertion part 114. Part 118 is provided. In addition, the artificial tooth 120 is provided with a second tapered portion 121 to make an interview with the first tapered portion 118.

Here, the first tapered portion 118 is made in a form in which the cross-sectional area gradually decreases from the support portion 113 to the tooth insertion portion 114, and the artificial tooth 120 is coupled to the abutment 110 In the first tapered portion 118 and the second tapered portion 121 can be in close contact.

In the present invention, by additionally providing the structure of the first tapered portion 118 and the second tapered portion 121, compared to the case where the connection portion between the support portion 113 and the protrusion portion 112 is substantially orthogonal. The durability of the buttment 110 can be significantly improved.

Incidentally, when a user chews food or performs a mastication exercise, external pressure caused by the food acts in a vertical direction along the length direction of the protrusion 112 and is transmitted to the support part 113, and also the side of the artificial tooth 120 As the external pressure acting in the direction is also transmitted toward the lateral direction of the protrusion 112, the external force inevitably concentrates on the edge portion (approximately orthogonal portion) to which the support 113 and the protrusion 112 are connected. In this structure, when the external force is repeatedly intensively applied for a long period of time, cracks are generated at the connection part between the support part 113 and the protrusion part 112, and the support part 113 and the protrusion part 112 are severely affected as the degree of cracking increases. There is a serious problem in which the separation occurs.

The present invention provides a first taper portion 118 and a second taper portion 121 to prevent the occurrence of such a problem, so that an external force acts in a vertical direction along the length direction of the protrusion 112 and laterally Even if the acting phenomenon is repeated for a long period of time, the external force is not concentrated in the connection portion between the support part 113 and the protrusion part 112 but is distributed around the load, thereby further increasing the durability of the entire implant.

On the other hand, as shown in Figures 2 to 4, the upper outer circumferential surface of the protrusion 112 of the abutment 110 is provided with a coupling protrusion 119, the artificial tooth 120, the coupling protrusion 119 can be inserted The coupling groove 122 is provided so as to be.

The coupling protrusion 119 and the coupling groove 122 are made to have a cross-sectional shape corresponding to each other, and when the artificial tooth 120 is coupled to the abutment 110, the artificial tooth 120 is in position, further Specifically, it has the advantage of being able to make it easier and more accurate to perform the horizontal alignment.

Incidentally, when the artificial tooth 120 is lowered and coupled from the upper side of the abutment 110, the plurality of protrusions 112 momentarily contract inward, and the coupling protrusion 119 is the coupling groove 122 When the movement to the formed position is completed, the protrusion 112 is expanded outward again due to elasticity, and the coupling protrusion 119 is inserted into the coupling groove 122.

This coupling completion state refers to a state in which the artificial tooth 120 is properly coupled to the abutment 110. If the coupling protrusion 119 and the coupling groove 122 are not provided, the horizontal position coupling of the artificial tooth 120 maintains uniform contact between the upper surface of the support part 113 of the abutment 110 and the bottom surface of the artificial tooth. In this case, the contact area between the support part 113 and the bottom surface of the artificial tooth is narrow, so that it is not easy to engage in the horizontal direction.

However, in the present invention, when the operator combines the artificial tooth 120 through the coupling protrusion 119 and the coupling groove 122 structure, it is possible to quickly and easily combine the artificial tooth 120 in place, thereby reducing the labor force of the operator. .

As shown in Fig. 4(a), the coupling protrusion 119 may be formed in a semicircle or semi-elliptical shape. In addition, as shown in FIG. 4(b), the coupling protrusion 119 may be formed to have a triangular cross-sectional shape. When the coupling protrusion 119 has a triangular cross-sectional shape, the coupling protrusion 119 is preferably made so that its cross-sectional area gradually expands toward the end (upper part in the drawing) of the abutment 110.

In the present invention, as the coupling protrusion 119 is provided to have a cross-sectional shape of a semicircle, a semi-ellipse, and a triangle, the artificial tooth 120 is coupled to the abutment 110 and then the artificial tooth ( 120) has the advantage of easy separation when it is necessary to separate it again.

In other words, through the coupling protrusion 119 and the coupling groove 122 structure, it is possible to quickly and easily perform the horizontal alignment of the artificial tooth 120, as well as the abutment 110 and the artificial tooth 120 The attachment and detachment of artificial teeth for correction of the occlusal surface can be performed easily and conveniently.

Additionally, when the coupling protrusion 119 has a triangular shape whose cross-sectional area is enlarged toward the artificial tooth 120 as shown in the drawing, the artificial tooth 120 is moved from the upper direction to the lower side of the abutment 110 At the initial moment when the triangular equilateral portion of the coupling protrusion 119 contacts the corresponding equilateral portion of the coupling groove 122 in the process of coupling, the outer extension of the protrusion 112 is made instantaneously, and at this time, the sliding between the equilateral sides There is an advantage that the artificial tooth 120 can be joined more quickly by contact.

In the embodiment of the present invention, as shown in FIG. 3, the coupling protrusion 119 is continuously formed along the circumferential direction of the protrusion 112, and the coupling groove 122 is an insertion hole of the artificial tooth 120 ( 123) can be formed continuously along the circumferential direction.

In addition, the coupling protrusion 119 is formed in a plurality to be spaced apart from each other along the circumferential direction of the protrusion 112, and the coupling groove 122 is continuously along the circumferential direction of the inner circumferential surface of the insertion hole 123 of the artificial tooth 120 Can be formed. In the latter case, since the area occupied by the coupling protrusion 119 can be reduced compared to the former case, the material cost for manufacturing the abutment can be reduced.

2 to 4, between the support 113 of the abutment 110 and the artificial tooth 120, a gasket for maintaining airtightness between the artificial tooth 120 and the abutment 110 ( 150) is further provided.

When a void occurs between the support part 113 and the bottom surface of the artificial tooth 120, saliva or food scraps may penetrate into the void, and as a result, it is not only bad for hygiene, but also creates discomfort for the user. . The present invention can prevent the occurrence of the above-described disadvantages by suppressing the occurrence of voids between the support and the artificial tooth through the gasket 150 to ensure airtightness.

Usually, the artificial tooth 120 is made by sintering zirconia having no toughness and excellent hardness due to the material characteristics, and the abutment 110 is titanium (Ti) and has a hardness of HRC32 or higher, and conventionally, the airtightness is practically maintained without cement bonding. It wasn't easy.

In the embodiment of the present invention, the gasket 150 is formed of a gold (Au) or silver (Ag) material having a certain or more ductility, and the gasket is formed by the artificial tooth 120 when the second fixing screw 140 to be described later is fastened. By allowing 150 to be compressed for a certain amount or more, it is possible to achieve reliable airtightness between the artificial tooth and the support without cement bonding.

Here, the gasket 150 may be formed in the form of a ring-shaped washer, and specifically, it may be applied in the form of a flat washer or a wave washer capable of providing a certain degree of elasticity to a peripheral combination.

When the gasket 150 is applied in the form of a wave washer, the gasket 150 has an elastic force in the direction in which the artificial tooth 120 is pushed upward in a state in which the abutment 110 and the artificial tooth 120 are combined. In this case, an external force in the direction of pushing upward is applied to the second fixing screw 140 by the locking projection 124 of the artificial tooth 120. Eventually, the elastic force of the gasket 150 acts as an external force to push the second fixing screw 140 upward, and the second fixing screw 140 with respect to the abutment 110 is loosened by this external force. Can be further prevented and maintain a solid bond.

The artificial tooth 120 is coupled to the protrusion 112 in a manner that surrounds the outside of the protrusion 112 of the abutment 110, and the insertion hole 123 is inserted so that the protrusion 112 of the abutment 110 can be inserted. It is provided, specifically, coupled through the fastening between the second fixing screw 140 and the abutment 110.

The first fixing screw 130 is inserted into the through hole 115 and has one end coupled to the fixture 100 through screwing, thereby firmly fixing the abutment 110 to the fixture 100.

Next, the second fixing screw 140 is screwed to the first thread 117 of the abutment 110 to form a second thread 141 to extend the protrusion 112 outward, and the artificial tooth ( 120) It is inserted inward to fix the artificial tooth 120 with respect to the abutment 110.

In the present invention, as described above, when the protrusion 112 of the abutment 110 is formed of a plurality of pieces spaced apart from each other and the second fixing screw 140 is screwed into the protrusion 112, the screw is fastened. The plurality of protruding portion pieces of the protruding portion 112 may be expanded outward by the generated tensile force. The outer surface of the extended protrusion 112 is in close contact with the inner surface of the insertion hole 123 of the artificial tooth 120, and through this close contact, the abutment 110 and the artificial tooth 120 can be rigidly coupled.

Hereinafter, a dental implant according to a second embodiment of the present invention will be described, and a repeated description of the same configuration as in the first embodiment will be omitted, and reference numerals starting at 200 will be used for the same configuration.

The implant according to the second embodiment of the present invention is in close contact between the abutment 110 and the artificial tooth 120 using the extension of the protrusion 112 by fastening the second fixing screw 140 as described in the first embodiment. In addition to the coupling, a structure that can further expand the protrusion is added.

Specifically, as shown in Figs. 5 and 6, when the first fixing screw 230 is completely inserted into the through hole 215 of the abutment 210 and screwed with the fixture 200 1 A structure is provided in which the protrusion 212 of the abutment 210 is opened and expanded by the fixing screw 230. This expansion can likewise induce close contact between the protrusion of the abutment and the artificial tooth, so that a firm bond is maintained with each other.

5 and 6, the through hole of the abutment is provided at the first through hole 261 provided at the inner position corresponding to the insertion part 211 and at the inner position corresponding to the protrusion 212 It includes a second through hole (262).

In the present invention, the first through-hole 261 is provided in a straight line along the length direction of the abutment 210 and is provided with an inclined surface in a specific section, and the second through hole 262 is similarly straight along the length direction. It is prepared in a form.

Incidentally, the inner surface of the first through hole 261 includes an inclined surface provided in a region in contact with the outer surface of the head of the first fixing screw when the abutment 210 and the first fixing screw 230 are combined. .

In an embodiment of the present invention, the first inclined surface 271 is continuously provided on the inner surface of the first through hole 261 along the circumferential direction, and the first inclined surface ( A second inclined surface 272 is continuously provided along the circumferential direction to enable surface contact with the 271.

Here, the inclination angle A1 of the second inclined surface 272 is formed larger than the inclination angle A2 of the first inclined surface 271 by a certain amount or more. For example, the inclination angle A1 of the second inclined surface 272 on the outer surface of the head portion with respect to the longitudinal central axis of the first fixing screw 230 may be approximately 14 to 16 degrees. Further, the inclination angle A2 of the first inclined surface 271 with respect to the longitudinal central axis of the abutment 210 may be formed to be approximately 12 to 13 degrees.

In this way, since the inclination angle A1 of the second inclined surface 272 is formed larger than the inclination angle A2 of the first inclined surface 271, the first fixing screw 230 is completely inserted into the through hole of the abutment. When coupled to the fixture 200, the outer surface of the protrusion 212 may be widened while being wider than a certain amount, and due to the above-described cutout hole 216, such cross-sectional expansion can be performed more easily.

In summary, in the present invention, the protrusion 212 can be extended to the outside by a certain amount or more through fastening of the first fixing screw 230, and in addition, as described in the first embodiment, the second fixing screw 240 and the abutment The abutment 210 adopts a structure in which the protrusion 212 can be extended further outward through fastening with the ment 210, and the outer surface of the extended protrusion can be more closely contacted with the inner surface of the artificial tooth 220. The artificial tooth can be fixed without any gap to achieve a solid bond.

That is, the structure in which the first external expansion of the protrusion 212 is made through fastening of the first fixing screw 230 and the second external expansion of the protrusion 212 through fastening of the second fixing screw 240 is provided. It is adopted, and it is possible to maintain a strong bonded state by enabling close contact between the outer surface of the protrusion and the inner surface of the artificial tooth through the outer expansion of the protrusion over the second time.

Although the present invention has been described with reference to the accompanying drawings and the above-described preferred embodiments, the present invention is not limited thereto, but is limited by the claims to be described later. Therefore, those of ordinary skill in the art can variously modify and modify the present invention within the scope of the technical spirit of the claims to be described later.

100: fixture 110: abutment
112: protrusion 116: cut hole
117: first thread 118: first tapered portion
119: coupling protrusion 120: artificial tooth
121: second tapered portion 122: coupling groove
130: first fixing screw 140: second fixing screw
150: gasket 271: first inclined surface
272: second slope

Claims (8)

Fixtures (100, 200) to be placed in the gum bone;
Inserting portions 111 and 211 inserted into the fastening grooves of the fixture, protrusions 112 and 212 protruding upward of the fixture, and a through hole penetrating the insertion portion and the protrusion, and the protrusions 112 and 212 are at least a certain amount due to external force. Abutment (110, 210) provided with a plurality of cut-out holes (116, 216) to be spaced apart from each other along the circumferential direction so as to be expandable outward, and having first threads (117, 217) formed on the inner circumferential surface thereof;
Artificial teeth 120 and 220 coupled to the protrusions so as to surround the outside of the protrusions of the abutments 110 and 210;
First fixing screws (130, 230) that are inserted into the through holes and have one end coupled to the fixture to fix the abutment to the fixture; And
A second thread (141, 241) is formed to be screwed into the first thread of the abutment to extend the protrusion to the outside, and a second thread (141,241) is formed to be inserted into the artificial tooth to fix the artificial tooth to the abutment Dental implants including fixing screws (140,240). The method of claim 1,
A dental implant, characterized in that coupling protrusions (119,219) are provided on the outer circumferential surface of the upper end of the protrusion of the abutment, and coupling grooves (122,222) are provided in the artificial tooth so that the coupling protrusion can be inserted. The method of claim 2,
The coupling protrusions (119,219) have a cross-sectional shape of a semicircle, semi-ellipse or triangle, and the coupling groove (122,222) is a dental implant, characterized in that having a cross-sectional shape corresponding to the coupling protrusion. The method of claim 3,
When the coupling protrusion has a triangular cross-sectional shape, the coupling protrusion is a dental implant, characterized in that the cross-sectional area is gradually expanded toward the end side of the abutment. The method of claim 2,
The coupling protrusion is a dental implant, characterized in that formed continuously along the circumferential direction of the protrusion or formed in plurality to be spaced apart from each other. The method of claim 1,
The protrusions 112 and 212 of the abutment include support parts 113 and 213 having an expanded cross-sectional area to support the artificial tooth from the lower side, and tooth insertion parts 114 and 214 that can be inserted into the artificial tooth,
First taper portions 118 and 218 are provided at the connecting portion of the support portion and the tooth insertion portion so that the cross-sectional area gradually expands toward one side, and second taper portions 121 and 221 are provided on the artificial tooth to make an interview with the first taper portion. Dental implant, characterized in that. The method of claim 1,
The protrusion portion of the abutment includes a support portion having an expanded cross-sectional area to support the artificial tooth from a lower side, and a tooth insertion portion that can be inserted into the artificial tooth,
A dental implant, characterized in that a gasket (150,250) is further provided between the support and the artificial tooth to maintain airtightness between the artificial tooth and the abutment. The method of claim 1,
The through hole includes a first through hole 261 provided at a position corresponding to the insertion part and a second through hole 262 provided at a position corresponding to the protrusion,
A first inclined surface 271 is continuously provided on the inner surface of the second through hole along the circumferential direction, and a first inclined surface 271 is continuously provided on the outer surface of the head of the first fixing screw so as to be in surface contact with the first inclined surface. A second inclined surface 272 is provided,
Dental implant, characterized in that the inclination angle (A1) of the second inclined surface (272) is greater than the inclination angle (A2) of the first inclined surface (271).

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