KR102290876B1 - A fixture of dental implants - Google Patents

Abstract

According to the present invention, a fixture of a dental implant comprises: a fixture body provided with a screw unit formed in a spiral shape along a circumference of an outer wall, wherein an abutment insertion groove, into which an abutment is inserted, is recessed in a vertical direction from an upper end of the fixture body; and an abutment rotation support unit prepared in a shape fitting an outer wall of the abutment in at least a portion of an inner wall of the abutment insertion groove and prepared in a wavy shape along a circumferential direction of the fixture body to suppress relative rotation of the abutment for the fixture body.

Description

A fixture of dental implants

The present invention relates to a fixture for a dental implant, and more particularly, to a fixture for a dental implant capable of preventing shaking of an abutment coupled to the fixture.

An implant originally refers to a substitute that restores human tissue when it is lost, but in dentistry, it refers to a series of procedures that implant artificial teeth.

In order to replace the lost root (root), a fixture made of titanium, etc., which does not have a rejection reaction in the human body, is planted in the alveolar bone from which the tooth has escaped, and then the artificial tooth is fixed to restore the function of the tooth. It is a procedure that

In the case of general prostheses or dentures, the surrounding teeth and bones are damaged over time, but implants do not damage the surrounding tooth tissue.

Artificial teeth treatment (also called implant or implant treatment) varies depending on the type of fixture, but after drilling an implantation location using a predetermined drill, the fixture is placed in the alveolar bone to osseointegrate into the bone, and then the abutment ( After bonding the abutment, it is usually completed by placing the final prosthesis on the abutment.

Dental implants improve the function of dentures for partially and completely edentulous patients as well as single missing tooth restorations, improve the aesthetics of dental prosthetic restorations, and further dissipate excessive stress on the surrounding supporting bone tissue. It also helps to stabilize the dentition.

These dental implants generally include a fixture to be placed as an artificial tooth root, an abutment coupled on the fixture, and an abutment screw for fixing the abutment to the fixture; It includes an artificial tooth coupled to the abutment. Here, before the abutment is coupled to the fixture, that is, during the period until the fixture is osseointegrated to the alveolar bone, the abutment is coupled to the fixture to maintain the coupled state.

A fixture, which is a component of a dental implant, is placed in a drill hole formed in the alveolar bone by using a drill or the like at a position where the implant is operated, and plays the role of an artificial tooth root. A screw portion formed in a spiral shape is provided around the outer wall of the fixture for rigid fixation of the fixture and the alveolar bone.

In addition, the fixture is formed by being depressed in the longitudinal direction from the upper end is provided with an abutment insertion groove into which the abutment is inserted.

On the inner wall of the insertion groove for the abutment, the abutment and the tool are provided in a shape to fit the outer wall of the abutment to prevent the relative rotation of the abutment with respect to the fixture and the tool for rotation is detachably coupled. A combined coupling portion is provided.

The combination of the abutment and the tool has a function of receiving the rotational power of the tool for rotation when the fixture is installed by having the inner wall shape-fit to the outer wall of the abutment and the tool, and is inserted into the insertion groove for the abutment. It functions to block the relative rotation of the abutment with respect to the fixture.

In the fixture according to the prior art, the inner wall of the abutment coupling portion is provided in a hexagonal shape along the circumferential direction of the fixture. Of course, the abutment is provided with an insert having a shape in which the outer wall is shape-fitted to the inner wall of the abutment coupling portion.

As described above, the inner wall of the abutment coupling portion of the fixture according to the prior art and the outer wall of the insertion portion of the abutment are provided in a hexagonal shape. Since the outer wall of the insertion part of the abutment is not completely in close contact, a fine space is generated between the inner wall of the abutment coupling part of the fixture and the outer wall of the insertion part of the abutment.

Shaking is generated in the abutment coupled to the fixture by the separation space, and the shaking of the abutment causes damage to the abutment or the fixture.

In order to eliminate the shaking of the abutment, it is necessary to remove the separation space generated between the inner wall of the abutment coupling part of the fixture and the outer wall of the insertion part of the abutment. should be changed to a polygonal shape more than a conventional hexagon.

However, when the shape of the inner wall of the abutment coupling portion of the fixture is changed to a polygonal shape greater than or equal to the conventional hexagonal shape, there is a problem in that the torque of the rotating tool is not smoothly transmitted to the fixture.

That is, when the shape of the inner wall of the abutment coupling part is changed to a polygonal shape that is greater than or equal to the conventional hexagonal shape, the length of one side constituting the polygon becomes shorter than the length of one side of the conventional hexagonal shape. , there is a problem in that it is difficult to effectively transmit the torque of the rotating tool to the fixture.

Republic of Korea Patent Publication No. 10-1092314 (2011.12.05.)

An object of the present invention is to provide a dental implant fixture capable of preventing the shaking of an abutment coupled to the fixture and effectively receiving the torque of a rotating tool during the installation process of the fixture.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Moreover, it will be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The fixture of the dental implant according to the present invention for solving the above technical problem is provided with a screw portion formed in a spiral shape along the periphery of the outer wall, the insertion groove for the abutment into which the abutment is inserted is depressed in the longitudinal direction from the upper end a fixture body formed; And at least a portion of the inner wall of the insertion groove for the abutment is provided in a shape to fit the outer wall of the abutment, provided in a wavy shape along the circumferential direction of the fixture body, the abutment for the fixture body It may include a; abutment rotation blocking unit for preventing the relative rotation of.

Preferably, the abutment rotation blocking portion includes a plurality of concave portions bent toward the outer wall of the fixture body; and a plurality of convex portions bent toward the axis of rotation of the fixture body.

Preferably, the plurality of concave portions and the plurality of convex portions may intersect along a circumferential direction of the fixture body.

Preferably, the plurality of concave portions may be formed to overlap a virtual circle in which a centrifugal force is located on a rotational axis of the fixture body.

Preferably, the plurality of convex portions may be formed to overlap the circle of curvature in which the center of curvature is located outside the virtual circle.

Preferably, the fixture body is disposed in the lower region of the abutment rotation preventing part among the insertion grooves for the abutment, is formed in the longitudinal direction from the lower part of the abutment rotation preventing part, and the abutment is inserted into the fixture It may further include; a female screw portion to which the male screw portion of the abutment screw coupled to the body is fastened.

Preferably, the fixture body is disposed in the upper region of the abutment rotation blocking portion among the insertion grooves for the abutment, and the inner diameter is tapered from the upper end of the fixture body to the lower end of the fixture body. ; may be included.

According to the present invention, the inner wall is shaped to fit the outer wall of the abutment and includes an abutment rotation stopping portion formed in a wavy shape along the circumferential direction, thereby preventing the shaking of the abutment coupled to the fixture body. The torque of the rotating tool can be effectively transmitted during the installation process.

1 is a perspective view of a fixture of a dental implant according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line CSa1-CSa1' of FIG. 1 .
3 is a cross-sectional view taken along the line CSa2-CSa2' of FIG. 1 .
4 is a perspective view of a dental implant system including the fixture of the dental implant according to the first embodiment of the present invention and the abutment of the dental implant according to the first embodiment of the present invention.
5 is a cross-sectional view of a fixture of a dental implant according to a second embodiment of the present invention.
6 is a perspective view of a dental implant system including a dental implant fixture according to a second embodiment of the present invention and an abutment of the dental implant according to the second embodiment of the present invention.
7 is a perspective view of a dental implant system including a dental implant fixture according to a second embodiment of the present invention and an abutment of a dental implant according to a third embodiment of the present invention.
8 is a perspective view of a fixture of a dental implant according to a third embodiment of the present invention.
9 is a cross-sectional view taken along line CSc1-CSc1' of FIG. 8 .
FIG. 10 is a cross-sectional view taken along line CSc2-CSc2' of FIG. 8 .
11 is a cross-sectional perspective view taken along line CSc1-CSc1' of FIG. 8 .
12 is a perspective view of a dental implant system including a dental implant fixture according to a third embodiment of the present invention and an abutment of a dental implant according to a fourth embodiment of the present invention.
13 is a perspective view of a dental implant system including a dental implant fixture according to a third embodiment of the present invention and an abutment of a dental implant according to a fifth embodiment of the present invention.
14 is a perspective view of a fixture for a dental implant according to a fourth embodiment of the present invention.
15 is a cross-sectional view taken along line CSd1-CSd1' of FIG. 14 .
16 is a cross-sectional view taken along line CSd2-CSd2' of FIG. 14 .
17 is a perspective view of a dental implant system including a dental implant fixture according to a fourth embodiment of the present invention and an abutment of a dental implant according to a sixth embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that various modifications, equivalents, and/or alternatives of the embodiments of the present invention are included. In connection with the description of the drawings, like reference numerals may be used for like elements.

In this document, expressions such as "have", "may have", "includes", or "may include" refer to the presence of a corresponding characteristic (eg, a numerical value, function, operation, or component such as a part). and does not exclude the presence of additional features.

In this document, expressions such as “A or B”, “at least one of A or/and B”, or “one or more of A or/and B” may include all possible combinations of the items listed together. . For example, "A or B", "at least one of A and B", or "at least one of A or B" means (1) includes at least one A, (2) includes at least one B; Or (3) it may refer to all cases including both at least one A and at least one B.

Expressions such as "first", "second", "first", or "second" used in this document may modify various elements, regardless of order and/or importance, and may modify one element. It is used only to distinguish it from other components, and does not limit the components. For example, the first wearer device and the second wearer device may represent different wearer devices regardless of order or importance. For example, without departing from the scope of the rights described in this document, a first component may be referred to as a second component, and similarly, the second component may also be renamed as a first component.

A component (eg, a first component) is "coupled with/to (operatively or communicatively)" to another component (eg, a second component) When referring to "connected to", it will be understood that the certain element may be directly connected to the other element or may be connected through another element (eg, a third element). On the other hand, when it is said that a component (eg, a first component) is "directly connected" or "directly connected" to another component (eg, a second component), the component and the It may be understood that other components (eg, a third component) do not exist between other components.

Terms used in this document are only used to describe specific embodiments, and may not be intended to limit the scope of other embodiments. The singular expression may include the plural expression unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meanings as commonly understood by one of ordinary skill in the art described in this document. Among the terms used in this document, terms defined in general dictionary may be interpreted with the same or similar meaning to the meaning in the context of the related art, and unless explicitly defined in this document, have an ideal or excessively formal meaning. not interpreted In some cases, even terms defined in this document cannot be construed to exclude embodiments of this document.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. However, in describing the present invention, a description of a function or configuration already known will be omitted in order to clarify the gist of the present invention.

1 is a perspective view of a fixture 100a of a dental implant according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line CSa1-CSa1' of FIG. 1, and FIG. 3 is CSa2-CSa2' of FIG. It is a cross-sectional view of a line.

1 to 3 , a large number of teeth are arranged on the gums. Teeth are the primary means of digestion that break down food and send it to the stomach, and although it may differ from person to person, there are usually about 28 teeth.

If any one of these teeth is lost (the posterior part is missing), the missing teeth may cause not only a loss of aesthetics but also considerable discomfort in chewing food.

Accordingly, the fixture 100a of the dental implant according to the first embodiment of the present invention is placed in the gum of the lost tooth as a means to replace the root of the tooth.

The fixture 100a of the dental implant according to the first embodiment of the present invention may include a fixture body 110a and an abutment rotation preventing unit 120a.

The fixture body 110a is implanted in the alveolar bone in the gum, and a drilling operation is preceded for implantation of the fixture body 110a before implantation. That is, a hole drilled in a predetermined position of the alveolar bone is processed.

The fixture body 110a may be made of titanium (Ti, Titanium) or a titanium (Ti) alloy that does not have a negative reaction to the human body.

For reference, the fixture body 110a of this embodiment to be described below may be used for the first implant procedure, or is directly implanted in the corresponding alveolar bone without supplementing a predetermined bone substitute material in the damaged area when the procedure fails. It may be used for emergency use.

This fixture body (110a) is provided with a screw portion (111a) formed in a spiral shape along the circumference of the outer wall, the insertion groove (112a) for the abutment into which the abutment is inserted in the vertical direction (-y-axis direction) from the upper end. It may be formed by being depressed.

The screw portion (111a) is implanted in the alveolar bone, and may be provided with a plurality of threads to be fixed to the alveolar bone after the implantation is completed.

The abutment rotation blocking portion 120a is provided in a shape that is shape-fitted to the outer wall of the abutment to at least a portion of the inner wall of the insertion groove 112a for the abutment, and is waved along the circumferential direction of the fixture body 110a. It is provided in a shape to prevent the relative rotation of the abutment with respect to the fixture body (110a).

Specifically, the abutment rotation blocking portion 120a is a plurality of concave portions 121a bent toward the outer wall of the fixture body 110a and a plurality of convex portions bent toward the rotation axis Ra of the fixture body 110a ( 122a) may be provided.

Each of the plurality of concave portions 121a and the plurality of convex portions 122a may intersect along the circumferential direction of the fixture body 110a. That is, each of the plurality of concave portions 121a and the plurality of convex portions 122a is not continuously connected, and any one of the plurality of convex portions 122a is located in any one of the plurality of concave portions 121a. It may be formed in a wavy shape.

Meanwhile, the plurality of concave portions 121a may be formed to overlap with the virtual circle Ca1′ in which the centrifugal Ca1 is positioned on the rotation axis Ra of the fixture body 110a.

Specifically, as shown in FIG. 3, the plurality of concave portions 121a have a cross section on a plane (xz plane) perpendicular to the rotation axis Ra of the fixture body 110a is the rotation axis Ra of the fixture body 110a. It may overlap with the virtual circle Ca1' on which the centrifugal Ca1 is located. In this case, the radius of the virtual circle Ca1 ′ may be lengthened or shortened corresponding to the position of the centrifugal Ca1 on the rotation axis Ra of the fixture body 110a, or may be the same.

Meanwhile, the plurality of convex portions 122a may be formed to overlap the circle of curvature Ca2' in which the center of curvature Ca2 is positioned outside the virtual circle Ca1'.

Specifically, as shown in FIG. 3 , the cross section of the plurality of convex portions 122a on a plane (xz plane) perpendicular to the rotation axis Ra of the fixture body 110a may overlap the circle of curvature Ca2′. . In this case, in the curvature circle Ca2', the center of curvature Ca2 may be located outside the virtual circle Ca1'.

Accordingly, when the abutment rotation blocking portion 120a is inserted into the abutment corresponding to the shape of the plurality of concave portions 121a and the plurality of convex portions 122a inside, the rotation of the abutment is prevented as well. Rather, in the process of implanting the fixture body (110a) in the alveolar bone, the torque transmission rate can be improved by receiving the torque from the implantation device through surface contact rather than point contact with the implantation device (drill).

Meanwhile, the fixture body 110a may further include a female screw part 113a.

The female threaded portion 113a is disposed in the lower region of the abutment rotation blocking portion 120a among the insertion grooves 112a for the abutment, in the vertical direction from the lower portion of the abutment rotation blocking portion 120a ( -y-axis direction), the male screw portion of the abutment screw for coupling the abutment to the fixture body 110a may be fastened.

That is, the lower portion of the abutment through the center of the inner portion is inserted into the abutment rotation blocking portion 120a, and the male screw portion of the abutment screw passing through the inner portion of the center of the abutment is screwed into the female screw portion (113a). Thus, the abutment may be coupled and fixed to the fixture body 110a.

4 is a dental implant system 10a including a dental implant fixture 100a according to the first embodiment of the present invention and an abutment 100a' of the dental implant according to the first embodiment of the present invention. ) is a perspective view.

Referring to FIG. 4 , the dental implant system 10a includes the fixture 100a of the dental implant according to the first embodiment described above and the abutment 100a' of the dental implant according to the first embodiment of the present invention. ) may be included.

The fixture 100a of the dental implant according to the first embodiment and the abutment 100a' of the dental implant according to the first embodiment of the present invention may be fitted and coupled to each other.

Specifically, the abutment 100a ′ of the dental implant according to the first embodiment may have an insertion protrusion 110a ′ having a shape corresponding to the shape of the abutment rotation preventing unit 120a at a lower portion thereof. . The insertion protrusion 110a' is bent toward the central axis of the abutment 100a' of the dental implant according to the first embodiment, and a plurality of abutments formed in a shape corresponding to the shape of the plurality of convex parts 122a. A plurality of concave portions 111a ′ and a plurality of concave portions formed in a shape corresponding to the shapes of the plurality of concave portions 121a and bent in the opposite direction to the central axis of the abutment 100a ′ of the dental implant according to the first embodiment. An abutment convex portion 112a' may be provided.

Each of the plurality of abutment concave portions 111a ′ and the plurality of abutment convex portions 112a ′ is not continuously connected, and a plurality of abutment concave portions 111a ′ are located in any one of the plurality of abutment concave portions 111a ′. Any one of the butt convex portions 112a ′ may be positioned to form a wave shape.

Accordingly, the abutment 100a' of the dental implant according to the first embodiment may be prevented from rotating by the plurality of concave portions 121a and the plurality of convex portions 122a.

5 is a cross-sectional view of a fixture 100b of a dental implant according to a second embodiment of the present invention.

5 , the fixture 100b of the dental implant according to the second embodiment of the present invention has a fixture body 110b compared to the fixture 100a of the dental implant according to the first embodiment of the present invention. It further includes a tapered portion 114b, only the positions of the female threaded portion 113b and the abutment rotation blocking portion 120b of the fixture body 110b are different, and other components and roles may be the same. . Accordingly, repeated descriptions will be omitted.

The fixture 100b of the dental implant according to the second embodiment includes a fixture body 110b including a screw portion 111b, an insertion groove for an abutment 112b, a female screw portion 113b, and a tapered portion 114b, and , may include an abutment rotation blocking portion 120b including a plurality of concave portions 121b and a plurality of convex portions 122b.

The tapered portion 114b is disposed in the upper region of the abutment rotation blocking portion 120b among the insertion grooves 112b for the abutment, and is formed at the upper end of the fixture body 110b of the fixture body 110b. It may be formed to be tapered so that the inner diameter becomes shorter toward the lower end.

Specifically, the tapered portion 114b may have a circular cross-section on a plane (xz plane) perpendicular to the rotation axis Rb of the fixture body 110b, and the area and radius of the cross-section are respectively the lower end of the fixture body 110b. It can get smaller and shorter as time goes on.

Accordingly, the abutment other than the abutment inserted into the abutment rotation blocking part 120b is inserted into the tapered part 114b due to the external force applied to the abutment in the vertical direction (+y-axis direction) due to the abutment It is possible to prevent the separation of the ment from the fixture body (110b).

As described above, the tapered portion 114b of the fixture body 110b according to the present embodiment is provided in a tapered shape in which the diameter gradually decreases along the implantation direction, and is formed in a structure similar to natural teeth and is stable, and when implanted By suppressing the bone heating that occurs, implantation is facilitated, and initial fixation force can be increased.

6 is a dental implant system 10b including a dental implant fixture 100b according to a second embodiment of the present invention and an abutment 100b' of a dental implant according to a second embodiment of the present invention. ) is a perspective view.

Referring to FIG. 6 , the dental implant system 10b includes the fixture 100b of the dental implant according to the second embodiment described above and the abutment 100b' of the dental implant according to the second embodiment of the present invention. ) may be included.

The fixture 100b of the dental implant according to the second embodiment and the abutment 100b' of the dental implant according to the second embodiment of the present invention may be coupled to each other by fitting.

Specifically, the abutment 100b ′ of the dental implant according to the second embodiment may have an insertion protrusion 110b ′ having a shape corresponding to the shape of the abutment rotation preventing unit 120b at a lower portion thereof. . The insertion protrusion 110b' is bent toward the central axis of the abutment 100b' of the dental implant according to the second embodiment, and a plurality of abutments formed in a shape corresponding to the shape of the plurality of convex parts 122b. A plurality of concave portions 111b' and a plurality of concave portions formed in a shape corresponding to the shapes of the plurality of concave portions 121b and bent in the opposite direction to the central axis of the abutment 100b' of the dental implant according to the second embodiment. An abutment convex portion 112b ′ may be provided.

Each of the plurality of abutment concave portions 111b ′ and the plurality of abutment convex portions 112b ′ is not continuously connected, and a plurality of abutment concave portions 111b ′ are located in any one of the plurality of abutment concave portions 111b ′. Any one of the butt convex portions 112b ′ may be positioned to form a wave shape.

Accordingly, the abutment 100b ′ of the dental implant according to the second embodiment may be prevented from rotating by the plurality of concave portions 121b and the plurality of convex portions 122b .

7 is a dental implant system 10b including a dental implant fixture 100b according to a second embodiment of the present invention and an abutment 100b″ of a dental implant according to a third embodiment of the present invention. ) is a perspective view.

Referring to FIG. 7 , the dental implant system 10b includes a fixture 100b of a dental implant according to the second embodiment described above and an abutment 100b” of a dental implant according to a third embodiment of the present invention. ) may be included.

The fixture 100b of the dental implant according to the second embodiment and the abutment 100b” of the dental implant according to the third embodiment of the present invention may be rotationally coupled to each other.

Specifically, the abutment (100b ″) of the dental implant according to the third embodiment has an abutment screw (110b ″) having a shape corresponding to the female thread part (113b) of the fixture body (110b) at the lower portion to be formed. can The abutment screw 110b ″ may include a male thread part 111b ″ that is screwed with the female thread part 113b of the abutment 100b ″ of the dental implant according to the third embodiment.

8 is a perspective view of a fixture 100c of a dental implant according to a third embodiment of the present invention, FIG. 9 is a cross-sectional view taken along line CSc1-CSc1' of FIG. 8, and FIG. 10 is CSc2-CSc2' of FIG. It is a cross-sectional view along the line, and FIG. 11 is a cross-sectional perspective view along the line CSc1-CSc1' of FIG. 8 .

8 to 11, the fixture 100c of the dental implant according to the third embodiment of the present invention is compared to the fixture 100b of the dental implant according to the second embodiment of the present invention, components and The role is the same, but only the female screw portion 113c and the abutment rotation blocking portion 120c of the fixture body 110c overlap and are formed, and other components and roles may be the same. Accordingly, repeated descriptions will be omitted.

The fixture 100c of the dental implant according to the third embodiment includes a fixture body 110c including a screw portion 111c, an insertion groove for an abutment 112c, a female screw portion 113c and a tapered portion 114c, and , may include an abutment rotation blocking portion 120c including a plurality of concave portions 121c and a plurality of convex portions 122c.

Meanwhile, the plurality of concave portions 121c may be formed to overlap the virtual circle Cc1 ′ in which the centrifugal Cc1 is positioned on the rotation axis Rc of the fixture body 110c.

Specifically, as shown in Figure 10, the plurality of concave portions 121c has a cross section on a plane (xz plane) perpendicular to the rotation axis Rc of the fixture body 110c is the rotation axis Rc of the fixture body 110c. It may overlap with the imaginary circle Cc1' in which the centrifugal Cc1 is located. In this case, the radius of the virtual circle Cc1 ′ may be lengthened or shortened corresponding to the position of the centrifugal Cc1 on the rotation axis Rc of the fixture body 110c, or may be the same.

Meanwhile, the plurality of convex portions 122c may be formed to overlap the circle of curvature Cc2' in which the center of curvature Cc2 is positioned outside the virtual circle Cc1'.

Specifically, as shown in FIG. 10 , the cross section of the plurality of convex portions 122c on a plane (xz plane) perpendicular to the rotation axis Rc of the fixture body 110c may overlap the circle of curvature Cc2'. . In this case, the curvature circle Cc2' may have a center of curvature Cc2 located outside the virtual circle Cc1'.

At this time, the female screw portion 113c is, as shown in FIG. 11, the male screw portion of the abutment is screwed, and a plurality of convex portions 122c bent toward the rotation axis Rc of the fixture body 110c and overlapping female screws. A mountain portion 113c' may be provided.

Specifically, the female threaded portion 113c is at least a part of the plurality of convex portions 122c from the rotation axis Rc of the fixture body 110c toward the outer wall of the fixture body 110c. .

Accordingly, when an abutment having a lower portion formed in a shape corresponding to the shape of the abutment rotation preventing portion 120c is inserted into the abutment insertion groove 112c, by the abutment rotation blocking portion 120c Rotation of the abutment is prevented, and the upper middle portion of the abutment may be fitted to the tapered portion 114c.

On the other hand, when the abutment having a male screw portion formed on the lower portion is inserted into the insertion groove 112c for the abutment, the male screw portion of the abutment is screwed to the female screw portion 113c, and the abutment is screwed into the tapered portion 114c. can be fitted together.

Through this, the fixture 100c of the dental implant according to the third embodiment has a shape corresponding to the shape of the abutment rotation-blocking unit 120c, and among an abutment having a lower portion and an abutment having a male screw portion formed in the lower portion. Either one may be alternatively combined.

12 is a dental implant system 10c including a dental implant fixture 100c according to a third embodiment of the present invention and an abutment 100c' of a dental implant according to a fourth embodiment of the present invention. ) is a perspective view.

Referring to FIG. 12 , the dental implant system 10c includes a fixture 100c of a dental implant according to the above-described third embodiment and an abutment 100c' of a dental implant according to the fourth embodiment of the present invention. ) may be included.

The fixture 100c of the dental implant according to the third embodiment and the abutment 100c' of the dental implant according to the fourth embodiment of the present invention may be fitted and coupled to each other.

Specifically, the abutment 100c' of the dental implant according to the fourth embodiment may have an insertion protrusion 110c' having a shape corresponding to the shape of the abutment rotation preventing unit 120c at the lower portion. . The insertion protrusion 110c' is bent toward the central axis of the abutment 100c' of the dental implant according to the fourth embodiment and is formed in a shape corresponding to the shape of the plurality of convex portions 122c. A plurality of concave portions 111c ′ and a plurality of concave portions formed in a shape corresponding to the shape of the plurality of concave portions 121c bent in the opposite direction to the central axis of the abutment 100c ′ of the dental implant according to the fourth embodiment. An abutment convex portion 112c ′ may be provided.

Each of the plurality of abutment concave portions 111c ′ and the plurality of abutment convex portions 112c ′ is not continuously connected, and a plurality of abutment concave portions 111c ′ are located in any one of the plurality of abutment concave portions 111c ′. Any one of the butt convex portions 112c ′ may be positioned to form a wave shape.

Accordingly, rotation of the abutment 100c' of the dental implant according to the fourth embodiment may be inhibited by the plurality of concave portions 121c and the plurality of convex portions 122c.

13 is a dental implant system 10c including a dental implant fixture 100c according to a third embodiment of the present invention and an abutment 100c” of a dental implant according to a fifth embodiment of the present invention. ) is a perspective view.

Referring to FIG. 13 , the dental implant system 10c includes a dental implant fixture 100c according to the above-described third embodiment and an abutment 100c” of a dental implant according to a fifth embodiment of the present invention. ) may be included.

The fixture 100c of the dental implant according to the third embodiment and the abutment 100c” of the dental implant according to the fifth embodiment of the present invention may be rotationally coupled to each other.

Specifically, in the abutment 100c ″ of the dental implant according to the fifth embodiment, the abutment screw 110c ″ having a shape corresponding to the female thread part 113c of the fixture body 110c is formed therein. can The abutment screw 110c ″ may include a female thread part 113c of the abutment 100c ″ of the dental implant according to the fifth exemplary embodiment and a male thread part 111c ″ screwed together.

14 is a perspective view of a fixture 100d of a dental implant according to a fourth embodiment of the present invention, FIG. 15 is a cross-sectional view taken along line CSd1-CSd1' of FIG. 14, and FIG. 16 is CSd2-CSd2' of FIG. It is a cross-sectional view of a line.

14 to 16, the fixture 100d of the dental implant according to the fourth embodiment of the present invention is compared to the fixture 100a of the dental implant according to the first embodiment of the present invention, the fixture body portion (110d) replaces the insertion groove (112a) for the abutment and includes an insertion groove (112d) for the screw, the position of the female screw portion (113b) and the abutment rotation blocking portion (120d) of the fixture body (110b) Only they are different, and other components and roles may be the same. Accordingly, repeated descriptions will be omitted.

The fixture 100d of the dental implant according to the fourth embodiment includes a screw portion 111d, a fixture body 110d including a screw insertion groove 112d and a female screw portion 113d, and a plurality of concave portions 121d. and an abutment rotation preventing portion 120d including a plurality of convex portions 122d.

The fixture body 110d may be formed by recessing an insertion groove 112d for a screw into which the abutment is inserted in the longitudinal direction (-y-axis direction) from the upper end.

The female screw portion 113d is formed over the entire area of the insertion groove 112d for the screw, and the male screw portion of the abutment screw for coupling the abutment to the fixture body 110d may be fastened thereto.

The abutment rotation blocking portion 120d may be formed with a step difference from the screw portion 111d in the upper region of the screw portion 111d formed on the outer wall of the fixture body 110d.

Meanwhile, the plurality of concave portions 121d may be formed to overlap the virtual circle Cd1 ′ in which the centrifugal Cd1 is positioned on the rotation axis Rd of the fixture body 110d.

Specifically, as shown in FIG. 16, the plurality of concave portions 121d have a cross section on a plane (xz plane) perpendicular to the rotation axis Rd of the fixture body 110d is the rotation axis Rd of the fixture body 110d. It may overlap with the virtual circle Cd1' on which the centrifugal Cd1 is located. In this case, the radius of the virtual circle Cd1 ′ may be lengthened or shortened corresponding to the position of the centrifugal Cd1 on the rotation axis Rd of the fixture body 110d, or may be the same.

Meanwhile, the plurality of convex portions 122d may be formed to overlap the circle of curvature Cd2' in which the center of curvature Cd2 is positioned outside the virtual circle Cd1'.

Specifically, as shown in FIG. 16 , the cross section of the plurality of convex portions 122d on a plane (xz plane) perpendicular to the rotation axis Rd of the fixture body 110d may overlap the circle of curvature Cd2′. . In this case, the center of curvature Cd2 of the circle of curvature Cd2' may be located outside the virtual circle Cd1'.

17 is a dental implant system 10d including a dental implant fixture 100d according to a third embodiment of the present invention and an abutment 100d' of a dental implant according to a fourth embodiment of the present invention. ) is a perspective view.

Referring to FIG. 17 , the dental implant system 10d includes a fixture 100d for a dental implant according to the third embodiment and an abutment 100d' for a dental implant according to the fourth embodiment of the present invention. ) may be included.

The fixture 100d of the dental implant according to the third embodiment and the abutment 100d' of the dental implant according to the fourth embodiment of the present invention may be coupled to each other by fitting.

Specifically, in the abutment 100d' of the dental implant according to the fourth embodiment, an insertion groove 110d' having a shape corresponding to the shape of the abutment rotation preventing unit 120d may be formed in the lower portion. . Inside the insertion groove (110d'), a plurality of bent toward the opposite direction of the central axis of the abutment (100d') of the dental implant according to the fourth embodiment and formed in a shape corresponding to the shape of the plurality of convex parts (122d) of the abutment concave portion 111d' and a plurality of bent toward the central axis of the abutment 100d' of the dental implant according to the fourth embodiment and formed in a shape corresponding to the shape of the plurality of concave portions 121d may include an abutment convex portion 112d' of

Each of the plurality of abutment concave portions 111d ′ and the plurality of abutment convex portions 112d ′ is not continuously connected, but a plurality of abutment concave portions 111d ′ in any one of the plurality of abutment concave portions 111d ′. Any one of the butt convex portions 112d ′ may be positioned to form a wave shape.

Accordingly, the abutment 100d' of the dental implant according to the fourth embodiment may be prevented from rotating by the plurality of concave portions 121d and the plurality of convex portions 122d.

On the other hand, the fixture body (110a, ..., 110d) of the present embodiment may be provided with a cutting edge formed along the circumferential direction (cutting edge). Such a cutting edge portion, by forming a sharp tip, it is possible to more easily implant the fixture body (110a, ..., 110d).

The cutting edge portion of this embodiment is provided so that the shape of the cut cross-section has a circular groove shape. As the shape of the screw portion is reduced and the surface area is rather reduced, the bonding force with the alveolar bone is reduced.

The cutting edge portion provided in the groove shape as in the present embodiment increases the surface area of the screw portion to improve the coupling force when the fixture body (110a, ..., 110d) is installed, thereby increasing the initial fixing force.

So far, the present invention has been focused on preferred embodiments. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive point of view. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within an equivalent scope should be construed as being included in the present invention.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

100a: dental implant fixture
110a: fixture body
120b: abutment rotation stop unit

Claims (7)

A fixture body provided with a screw portion formed in a spiral shape along the outer wall perimeter, the abutment insertion groove for inserting the abutment is recessed in the longitudinal direction from the upper end; and
At least a portion of the inner wall of the insertion groove for the abutment is provided in a shape to fit the outer wall of the abutment, and is provided in a wavy shape along the circumferential direction of the fixture body of the abutment for the fixture body. Including; abutment rotation blocking unit for preventing relative rotation
The abutment rotation blocking unit
a plurality of recesses bent toward an outer wall of the fixture body; and
and a plurality of convex portions bent toward the axis of rotation of the fixture body;
Among the insertion grooves for the abutment, it is disposed in the lower region of the abutment rotation-blocking part, is formed in the longitudinal direction from the lower part of the abutment rotation-blocking part, and from the rotation axis of the fixture body toward the outer wall of the fixture body. It further comprises a;
The female thread part
and a female threaded portion overlapping the plurality of convex portions;
The abutment rotation preventing portion having the plurality of concave portions and the plurality of convex portions
The lower portion is fitted with the abutment formed in a shape corresponding to the shape of the abutment rotation blocking portion,
The female thread part
It is screwed with the abutment formed with a male thread on the lower part,
the plurality of concave portions and the plurality of convex portions
intersect along the circumferential direction of the fixture body,
the plurality of recesses
A cross section on a plane perpendicular to the axis of rotation of the fixture body is formed to overlap with a virtual circle in which a centrifugal force is located on the axis of rotation of the fixture body,
The radius of the virtual circle is lengthened or shortened corresponding to the position of the centrifugal on the axis of rotation of the fixture body,
The plurality of convex portions
A cross section on a plane perpendicular to the axis of rotation of the fixture body is formed to overlap a circle of curvature in which a center of curvature is located outside the virtual circle,
The abutment rotation blocking unit
When the abutment corresponding to the shape of the plurality of concave portions and the plurality of convex portions is inserted inside, the rotation of the abutment is prevented, and in the process of implanting the fixture body in the alveolar bone, it is in surface contact with the implantation device rather than point contact. characterized in that it is placed
Fixtures for dental implants.
delete delete delete delete delete According to claim 1,
The fixture body is
It is disposed in the upper region of the abutment rotation blocking portion among the insertion grooves for the abutment, and is tapered from the upper end of the fixture body to the lower end of the fixture body so that the inner diameter becomes shorter. doing
Fixtures for dental implants.

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