KR102303869B1 - Dental implant - Google Patents

Abstract

A dental implant is disclosed. A dental implant of the present invention, a fixture to be placed in the bone of the gums; It includes an insertion part inserted into the fastening groove of the fixture, a protrusion protruding to the upper part of the fixture, and a through hole penetrating the insertion part and the protrusion, and the protrusion has a circumferential direction so that the protrusion can be extended outwardly by an external force by an external force or more. an abutment in which a plurality of cut-out holes are provided to be spaced apart from each other and a first screw thread is formed on an inner circumferential surface thereof; an artificial tooth coupled to the protrusion so as to surround the outside of the protrusion of the abutment; a first fixing screw inserted into the through hole and one end coupled to the fixture to fix the abutment with respect to the fixture; and a second screw thread fastened to the first screw thread of the abutment to form a second screw thread to extend the protrusion outward, and a second fixing screw inserted into the artificial tooth to fix the artificial tooth with respect to the abutment It is characterized in that it includes. According to the present invention, the protrusion of the abutment consists of a plurality of spaced apart in the circumferential direction, and the protrusion is expanded by the tensile force generated during coupling by screwing the second fixing screw inside the abutment so that the protrusion is in close contact with the inner surface of the artificial tooth. , it is possible to increase the bonding force between the abutment and the artificial tooth.

Description

Dental implants {DENTAL IMPLANT}

The present invention relates to a dental implant, and more particularly, when bonding an artificial tooth to an abutment, it is possible to mutually bond without using bonding bonding using an adhesive, and by increasing the mutual bonding force between the abutment and the artificial tooth. It relates to a dental implant capable of improving durability.

An implant is an artificial tooth that is implanted into the alveolar bone when a tooth is lost or lost. A procedure using an implant is a trend that is expanding because it is possible to operate only on a lost or lost tooth without damaging a tooth adjacent to the lost or lost tooth. In general, an implant is composed of a fixture to be placed in the alveolar bone, an abutment 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 applied load through the artificial tooth to the artificial tooth root, that is, the load to the jawbone. The contour should be considered, and in addition, the occlusion with the surrounding teeth and the antagonist teeth (upper or lower teeth), the condition of the gums, and the gum line should all be reflected.

Therefore, the abutment is custom-made through a computer aided design (CAD) or computer aided manufacturing (CAM) system in consideration of the patient's individual characteristics.

On the other hand, until recently, the abutment has a fatal problem in that it cannot be removed/separated when post-correction is required because it usually relies on a bonding process using an adhesive for integration with an artificial tooth.

That is, after the artificial tooth is placed, the corresponding implantation angle, shape, and height compared to other teeth are inspected. Based on these inspection results, whether or not the artificial tooth needs to be corrected is determined. Although the abutment should be separated, it is impossible to separate the abutment due to bonding. In order to supplement this, Patent Document 1 is disclosed. In Patent Document 1, it is disclosed for the coupling portion to be configured with an outer diameter that is expanded 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 does not change the degree of expansion and has a fixed state. When the implant user uses the implant for a long time, there is a problem in that the coupling force between the coupling part and the prosthesis may be weakened.

Republic of Korea Patent Publication No. 10-1768410 (registered on Aug. 8, 2017)

The present invention has been devised to solve the above-mentioned conventional problems, and by adopting a structure that can relatively further expand the outer diameter of the abutment compared to the initial state before the procedure when the artificial tooth and the abutment are mutually combined. An object of the present invention is 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.

Another object of the present invention is to provide a dental implant capable of improving overall durability by increasing the mutual coupling force between the abutment and the artificial tooth.

Another object of the present invention is to provide a dental implant that can further prevent cracks, etc. from occurring due to the concentration of the load on the contact area between the artificial tooth and the implant as a 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 the contact area between the artificial tooth and the abutment.

According to an aspect of the present invention, a fixture to be placed on the bone of the gums; It includes an insertion part inserted into the fastening groove of the fixture, a protrusion protruding to the upper part of the fixture, and a through hole penetrating the insertion part and the protrusion, and the protrusion has a circumferential direction so that the protrusion can be extended outwardly by an external force by an external force or more. an abutment in which a plurality of cut-out holes are provided to be spaced apart from each other and a first screw thread is formed on an inner circumferential surface thereof; an artificial tooth coupled to the protrusion so as to surround the outside of the protrusion of the abutment; a first fixing screw inserted into the through hole and one end coupled to the fixture to fix the abutment with respect to the fixture; and a second screw thread fastened to the first screw thread of the abutment to form a second screw thread to extend the protrusion outward, and a second fixing screw 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 upper outer peripheral surface 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 cross-sectional shape of a semicircle, a semi-ellipse, or a triangle, 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 be made to gradually increase in cross-sectional area toward the end of the abutment.

The coupling protrusion may be formed continuously along the circumferential direction of the protrusion or formed in plurality 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 the lower side and an insertion portion insertable into the artificial tooth, and the cross-sectional area gradually expands toward one side at the connection portion of the support portion and the insertion portion. A first tapered portion may be provided so as to be possible, and a second tapered portion may be provided on the artificial tooth to face the first tapered portion.

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

The through-hole includes a first through-hole provided at a position corresponding to the insertion portion and a second through-hole provided at a position corresponding to the protrusion, and an inner surface of the second through-hole is continuous along its circumferential direction. is provided with a first inclined surface, and a second inclined surface is continuously provided along the circumferential direction so as to be in surface contact with the first inclined surface on the outer surface of the head of the first fixing screw, and the inclination angle of the second inclined surface is the second 1 It may be greater than the inclination angle of the inclined surface.

According to the dental implant of the present invention described above, a plurality of protrusions of the abutment are configured to be spaced apart in the circumferential direction, and the protrusions are expanded by the tensile force generated during coupling by screwing a second fixing screw inside the abutment to make artificial 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 coupling groove structure on the abutment and the artificial tooth, respectively, the coupling force can be increased, and the first tapered part is provided at the connection part of the support part and the insertion part so that the cross-sectional area is gradually expanded toward one side, and the artificial tooth By providing the second tapered portion so as to face the first tapered portion, it is possible to further prevent the occurrence of cracks in the abutment portion due to the concentration of the load by vertical/lateral external force, thereby increasing durability.

In addition, by adding a gasket between the support and the contact surface of the artificial tooth, airtightness can be improved, and airtightness can be sufficiently maintained 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 secondary outer extension of the protrusion is made through the fastening of the second fixing screw, the outer extension of the protrusion over this second order is adopted. Through this, it is possible to make a close contact between the outer surface of the protrusion and the inner surface of the artificial tooth, thereby maintaining a strong bonding state.

1 is a cross-sectional view showing a state in which a dental implant is installed according to a first embodiment of the present invention;
2 is an exploded perspective view of a dental implant according to a first embodiment of the present invention;
3 is an exploded cross-sectional view of a dental implant according to a first embodiment of the present invention;
4 is a cross-sectional view showing the coupling state of the abutment, artificial teeth, and fixing screws in the dental implant according to the 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 coupling 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 various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and the scope of the invention to those of ordinary skill in the art will be completely It is provided to inform you. In the drawings, like reference numerals refer to like elements.

A dental implant according to a preferred embodiment of the present invention does not use a cement bonding bonding method when mutually bonding an artificial tooth and an abutment, and not only can firmly fix the artificial tooth with respect 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 with a screw, it is possible to improve the economic efficiency of the procedure by adopting a structure that can quickly combine the artificial teeth in the horizontal direction in place.

In addition, the dental implant according to the embodiment of the present invention employs a structure that enables the outer surface of the abutment to be closely attached to the inner surface of the artificial tooth through screw fastening for fixing the artificial tooth to the abutment after the procedure. By increasing the sense of unity between the artificial tooth and the artificial tooth, durability can be improved, and the shaking of the artificial tooth can be prevented even after long-term 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 has a fixture 100, an abutment 110, an artificial tooth 120, a first fixing screw 130 and and a second fixing screw 140 .

First, the fixture 100 is placed on the gum bone (alveolar bone) through a spiral 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 the lower region and provided in the upper region of the first fastening groove 102 and the first fastening groove 102 having a screw thread to be screw-coupled with the first fixing screw 130 , and is provided in the upper region of the fixture. (100) to prevent rotation of the abutment 110 when the end of the abutment 110 is inserted into the second fastening groove ( 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) includes a protrusion 112 protruding upward.

Here, as shown in FIGS. 2 and 3 , the protrusion 112 of the abutment 110 includes a support 113 having an expanded cross-sectional area to support the artificial tooth from the lower side and insertable into the artificial tooth. and a tooth insert 114 .

In addition, a through hole 115 is provided along the longitudinal direction so as to pass through the insertion portion 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 with respect to the fixture 100 is firmly fixed.

On the other hand, in the embodiment of the present invention, when the abutment 110 is coupled to the fixture 100 by inserting the first fixing screw 130 into the through hole 115, the outer surface of the protrusion 112 is in the initial state ( It is made to be in a state that is more extended outwardly, that is, a state that is further spread out than before).

As will be described in more detail below, the present invention employs a structure in which the protrusion 112 can be further extended outwardly through fastening with the abutment 110 of the second fixing screw 140 to be described later, and the expanded protrusion As the outer surface of the 112 can be more closely adhered to the inner surface of the artificial tooth 120 , the artificial tooth 120 can be fixed with respect to the abutment 110 without play to achieve a strong bonding state.

2 and 3, the protrusion 112 is provided with a plurality of cut-out holes 116 to be spaced apart from each other along the circumferential direction, and the outer surface of the protrusion 112 is expanded through the cut-out hole 116. This can be implemented more easily.

As the protrusion 112 is formed of a plurality of protrusion pieces spaced apart from each other by a plurality of cut-out holes 116, it is possible to extend outwardly by an external force or more, and the protrusion 112 has a second fixing screw 140 on the inner circumferential surface. A first screw thread 117 is formed for fastening with.

On the other hand, it is preferable to have the lower portion of the abutment 110 inserted into the fixture 100 in a polygonal shape such as a square, hexagon, or octagon to prevent rotation, and the protrusion 112 protruding to the outside has an overall interior. It may be made in an empty circular shape.

As shown in FIGS. 2 to 4 , in the embodiment of the present invention, the connection portion of the support portion 113 and the tooth insertion portion 114 of the abutment 110 has a first taper so that the cross-sectional area is gradually expanded toward one side. A portion 118 is provided. In addition, the second tapered portion 121 is provided in the artificial tooth 120 to face the first tapered portion 118 .

Here, the first tapered part 118 has a shape in which the cross-sectional area gradually decreases from the support part 113 to the tooth insertion part 114 , and the artificial tooth 120 is coupled to the abutment 110 . In this case, the first tapered portion 118 and the second tapered portion 121 may 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 as described above, the connection portion between the support portion 113 and the protrusion portion 112 is substantially orthogonal to each other. It is possible to significantly improve the durability of the butt 110 .

In other words, when the user chews food or performs a masticatory movement, the external pressure by the food acts in a vertical direction along the longitudinal direction of the protrusion 112 to be transmitted to the support 113 and also to 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 is inevitably concentrated on the edge portion (approximately orthogonal part) where the support 113 and the protrusion 112 are connected. In this structure, when an external force is repeatedly applied for a long period of time, a crack is generated in the connection portion between the support part 113 and the protrusion 112, and as the degree of cracking increases, the support part 113 and the protrusion 112 are severe. A serious problem arises in which the separation of

The present invention provides a first tapered portion 118 and a second tapered portion 121 to prevent the occurrence of such a problem in advance so that an external force acts in a vertical direction along the longitudinal direction of the protruding portion 112 and laterally Even if the action is repeated for a long period of time, the external force is not concentrated on the connecting portion of the support portion 113 and the protrusion 112 , but the load is distributed to the surroundings, thereby further increasing the durability of the entire implant.

On the other hand, as shown in FIGS. 2 to 4 , a coupling protrusion 119 is provided on the upper outer peripheral surface of the protrusion 112 of the abutment 110 , and the coupling protrusion 119 can be inserted into the artificial tooth 120 . A coupling groove 122 is provided to do so.

The coupling protrusion 119 and the coupling groove 122 are made to have cross-sectional shapes corresponding to each other, and when the artificial tooth 120 is coupled to the abutment 110, the in-place coupling of the artificial tooth 120, more Specifically, it has the advantage that it can be performed more easily and accurately in the horizontal direction in-situ coupling.

In other words, when lowering the artificial tooth 120 from the upper side of the abutment 110, the plurality of protrusions 112 have a state of instantaneous inward contraction, and the coupling protrusion 119 is coupled to the coupling groove 122. When the movement to the formed position is completed, the protrusion 112 is expanded outward again by elasticity, and the coupling protrusion 119 is inserted into the coupling groove 122 .

This coupling completion state means the in-place coupling state of the artificial tooth 120 with respect to the abutment 110 . If the engaging protrusion 119 and the engaging groove 122 are not provided, the horizontal alignment of the artificial tooth 120 maintains uniform contact between the upper surface of the support part 113 of the abutment 110 and the lower surface of the artificial tooth. It can be done only through, in this case, due to the narrow contact area between the support 113 and the bottom surface of the artificial tooth, it is not easy to combine in the horizontal direction.

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

As shown in Fig. 4 (a), the coupling protrusion 119 may be formed in a semi-circle 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, it is preferable that the coupling protrusion 119 gradually enlarges its cross-sectional area toward the end (upper part in the drawing) side of the abutment 110 .

In the present invention, as the coupling protrusion 119 is provided to have a cross-sectional shape of a semi-circle, 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 again.

That is, through the coupling protrusion 119 and the coupling groove 122 structure, it is possible not only to quickly / easily perform the in-place coupling of the artificial tooth 120 in the horizontal direction, but also the abutment 110 and the artificial tooth 120 . The attachment and detachment of artificial teeth for occlusal correction of occlusal surfaces can also be easily and conveniently performed.

Additionally, when the coupling protrusion 119 has a triangular shape in which the cross-sectional area is enlarged toward the artificial tooth 120 as shown in the figure, the artificial tooth 120 is moved from the upper direction to the lower side of the abutment 110 . In the process of combining the equilateral triangles of the engaging protrusions 119, the outer extension of the protrusions 112 is instantaneously extended at the initial moment when the equilateral triangles of the engaging protrusions 119 come into contact with the corresponding equilateral portions of the engaging grooves 122, and at this time, the sliding between the equilateral sides. The advantage of being able to more rapidly couple the artificial tooth 120 by contact occurs.

In the embodiment of the present invention, as shown in Fig. 3, the engaging projection 119 is continuously formed along the circumferential direction of the protrusion 112, and the engaging groove 122 is the insertion hole of the artificial tooth 120 ( 123) may be continuously formed along the circumferential direction of the inner circumferential surface.

In addition, the coupling protrusion 119 is formed in plurality to be spaced apart from each other along the circumferential direction of the protrusion 112 , and the coupling groove 122 is continuous 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, compared to the former case, the area occupied by the coupling protrusion 119 can be reduced, so that the material cost for manufacturing the abutment can be reduced.

2 to 4, between the support part 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 113 and the bottom surface of the artificial tooth 120, saliva or food waste may penetrate into the void, and as a result, it is not only bad for hygiene, but also creates discomfort for the user. . According to the present invention, the occurrence of the above-described disadvantages can be prevented by suppressing the occurrence of voids between the support part and the artificial teeth through the gasket 150 to enable reliable airtight maintenance.

Usually, artificial teeth 120 are made by sintering zirconia, which has no toughness due to material characteristics and has excellent hardness, and the abutment 110 is made of titanium (Ti) and has a hardness of HRC32 or higher. 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 ductility of at least a certain level, and when the second fixing screw 140 to be described later is fastened, the gasket 150 is formed by the artificial teeth 120 . (150) By making it possible to compress more than a certain amount, it is possible to achieve reliable airtightness between the artificial tooth and the support without the cement bonding operation.

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 elasticity of a certain level or more to a peripheral assembly.

When the gasket 150 is applied in the form of a wave washer, in the state in which the abutment 110 and the artificial tooth 120 are coupled, the gasket 150 exerts an elastic force in the direction of pushing the artificial tooth 120 upward in the drawing. is applied, and at this time, an external force in the upwardly pushing direction is also applied to the second fixing screw 140 by the locking jaw 124 of the artificial tooth 120 . As a result, the elastic force of the gasket 150 acts as an external force to push up the second fixing screw 140 upward, and the second fixing screw 140 with respect to the abutment 110 is loosened by this external force. It is possible to further prevent and maintain a strong bonding state.

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

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

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

In the present invention, as described above, the protrusion 112 of the abutment 110 is made of a plurality of pieces spaced apart from each other and the second fixing screw 140 is screwed inside the protrusion 112, so when the screw is fastened. The plurality of protrusion pieces of the protrusion 112 may be extended outwardly 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 the abutment 110 and the artificial tooth 120 are strongly coupled through such close contact.

Hereinafter, a dental implant according to a second embodiment of the present invention will be described, and repeated descriptions of the same components as those of the first embodiment are omitted and reference numerals starting with 200 are used for the same components.

The implant according to the second embodiment of the present invention is in close contact with the abutment 110 and the artificial tooth 120 using the expansion 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 extend 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 the screw coupling with the fixture 200 is completed. 1 A structure is provided so that the protrusion 212 of the abutment 210 expands while being spread outward by the fixing screw 230 . This expansion can likewise induce close contact between the protrusion of the abutment and the artificial tooth to maintain a strong bond with each other.

As shown in FIGS. 5 and 6 , the through hole of the abutment is provided at the first through hole 261 provided at the inner surface position corresponding to the insertion part 211 and the inner surface position corresponding to the protrusion part 212 . and a second through-hole 262 that is

In the present invention, the first through-hole 261 is provided in a straight shape along the longitudinal direction of the abutment 210 and an inclined surface is provided in a specific section, and the second through-hole 262 is also a straight line along the longitudinal direction. provided in the form.

In addition, 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 the 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 ( 271) and the second inclined surface 272 is continuously provided along the circumferential direction so as to be in surface contact.

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

In this way, the inclination angle A1 of the second inclined surface 272 is formed to be greater than the inclination angle A2 of the first inclined surface 271 by a certain amount or more, thereby completely inserting the first fixing screw 230 into the through hole of the abutment. When coupled to the fixture 200, the outer surface of the protrusion 212 can be expanded while being widened more than a certain amount, and this cross-sectional expansion can be carried out more easily due to the above-described cut-out hole 216 .

To summarize, in the present invention, the protrusion 212 can be extended to the outside by a certain amount or more through the 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 protrusion 212 adopts a structure that can be further extended outwardly through the fastening with the ment 210, and as the outer surface of the extended protrusion can be more closely attached to the inner surface of the artificial tooth 220, the abutment 210 It is possible to achieve a strong bonding state by fixing the artificial teeth without play.

That is, the first outer extension of the protrusion 212 is made through the fastening of the first fixing screw 230, and the second outer extension of the protrusion 212 is formed through the fastening of the second fixing screw 240. Adopted, it is possible to maintain a strong bonding state by enabling close contact between the outer surface of the protrusion and the inner surface of the artificial tooth through the outer extension of the protrusion over the secondary.

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, and is defined by the following claims. Accordingly, those of ordinary skill in the art can variously change and modify the present invention within the scope without departing from the 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 inclined surface

Claims (8)

Fixtures (100, 200) to be placed on the bone of the gums;
It includes insertion parts 111 and 211 inserted into the fastening groove of the fixture, protrusions 112 and 212 protruding to the upper part of the fixture, and a through hole penetrating the insertion part and the protrusion. Abutments 110 and 210 in which a plurality of cut-out holes 116 and 216 are provided to be spaced apart from each other along the circumferential direction so as to be expandable outwardly and first screw threads 117 and 217 are formed on the inner circumferential surface thereof;
Artificial teeth (120, 220) coupled to the protrusion so as to surround the outside of the protrusion of the abutment (110, 210);
first fixing screws (130 and 230) inserted into the through hole and having one end coupled to the fixture to fix the abutment with respect to the fixture; and
A second screw thread 141,241 is formed so as to be screwed to the first screw thread of the abutment to extend the protrusion outward, and is inserted into the artificial tooth to fix the artificial tooth with respect to the abutment. Includes fixing screws 140 and 240,
The coupling protrusions 119 and 219 are provided on the upper outer peripheral surface of the protrusion of the abutment, and coupling grooves 122 and 222 are provided in the artificial teeth so that the coupling protrusions can be inserted,
The protrusions 112 and 212 of the abutment include support portions 113 and 213 having an expanded cross-sectional area to support the artificial teeth from the lower side and tooth insertion portions 114 and 214 that can be inserted into the artificial teeth,
First tapered portions 118 and 218 are provided at the connection portion of the support and the tooth insertion portion so that the cross-sectional area gradually expands toward one side, and the artificial teeth are provided with second tapered portions 121 and 221 to face the first tapered portion. Dental implants, characterized in that. delete According to claim 1,
The coupling protrusions (119, 219) have a cross-sectional shape of a semicircle, a semi-ellipse, or a triangle, and the coupling grooves (122, 222) have a cross-sectional shape corresponding to the coupling protrusion. 4. The method of claim 3,
When the engaging protrusion has a triangular cross-sectional shape, the engaging protrusion is a dental implant, characterized in that the cross-sectional area is gradually enlarged toward the end side of the abutment. According to claim 1,
The coupling protrusion is formed continuously along the circumferential direction of the protrusion, or a plurality of dental implants are formed to be spaced apart from each other. delete According to claim 1,
The protrusion of the abutment includes a support part having an expanded cross-sectional area to support the artificial tooth from the lower side, and a tooth insertion part insertable into the artificial tooth,
Dental implant, characterized in that the gasket (150,250) for maintaining airtightness between the artificial tooth and the abutment is further provided between the support part and the artificial tooth. According to 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 the outer surface of the head of the first fixing screw is continuously provided along the circumferential direction 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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