KR102660106B1 - dental restoration set - Google Patents

Abstract

In order to improve installation convenience, the present invention provides a set of dental restorations coupled to the upper side of a fixture implanted in the alveolar bone to replace lost teeth, wherein an occlusal surface that engages with opposing teeth is formed on the upper side and a depression is formed to open downward. An artificial tooth portion formed with an insertion groove in which a fixing protrusion protrudes downward from the inner surface of the tooth; And a coupling protrusion screwed into a fastening groove formed at the top of the fixture, and a coupling protrusion provided integrally with the upper side of the coupling protrusion and inserted into the insertion groove, wherein the outer surface is molded so that rotation is restricted to the inner surface of the insertion groove. The post portion and the upper side of the post portion are integrally protruded upward, and the inner diameter of the fixing protrusion is formed to be smaller than the diameter of the fixing protrusion so that the fixing protrusion is forcefully fitted inside, but is elastically expanded in response to the diameter of the fixing protrusion along the circumferential direction. Provided is a set of dental restorations including an abutment including an elastic fixing portion in which a plurality of slot grooves are spaced apart from each other.

Description

Dental restoration set}

The present invention relates to a dental restoration set, and more specifically, to a dental restoration set with improved installation convenience.

In general, an implant refers to a substitute that can replace human tissue when the original human tissue is lost, but in dentistry, it involves transplanting an artificial tooth (hereinafter referred to as artificial tooth) or attaching an artificial tooth to the tooth root to fix it. This refers to the part that is installed. Here, it is desirable to understand that an implant as a part installed in the tooth root is a fixture.

In detail, the implant is made of titanium, etc., which is not rejected by the human body to replace the Sancyroddin tooth root. When the implant is placed in the alveolar bone where the tooth has fallen out and the artificial tooth is fixed on the upper side, the function of the tooth is restored. It can be.

At this time, the artificial tooth may be provided in the form of a single crown that individually corresponds to each tooth, and in some cases, it may be provided in the form of a bridge where two or more artificial teeth are connected or a complete prosthesis connected along the entire dental arch. Additionally, the implants may be installed singly or in multiple pieces depending on the number of artificial teeth.

Meanwhile, an abutment, which is a component for interconnecting the implant and the artificial tooth, is provided. In detail, the abutment is fixed to the top of the implant through a fixing screw, and the top of the abutment is inserted and fixed into a fixing groove formed in the lower part of the artificial tooth. These abutments are typically made of titanium, the same material used to manufacture the implant.

At this time, conventionally, the abutment and the artificial tooth were fixed through adhesive or fastening screws.

In detail, when the abutment and the artificial tooth are fixed with an adhesive, the artificial tooth is fixed to the abutment through the adhesive applied between the outer surface of the post of the abutment and the fixing groove. However, since the artificial tooth is made of a different material from the abutment, there is a problem in that it is difficult for the artificial tooth to be firmly attached to the abutment.

And, when the abutment and the artificial tooth are fixed through a fastening screw, a fastening hole communicating with the fixing groove is formed through the artificial tooth. In detail, when the fastening screw introduced through the fastening hole is fastened to the screw groove formed at the top of the abutment, the artificial tooth is fixed to the abutment. At this time, the fastening hole is provided with a ring-shaped locking end protruding radially inward so that the head of the fastening screw is caught, and the locking end is formed on a cylinder embedded and fixed inside the fastening hole or on the fastening hole. It can be formed integrally with the inner circumference.

However, when the cylinder is embedded in the fastening hole, the fastening hole must be formed to penetrate the artificial tooth relatively large. For this reason, when the artificial tooth is formed in the form of a single crown, durability is significantly reduced, and it is difficult for the artificial tooth to be shaped similarly to a real tooth.

Alternatively, when the locking end is formed integrally with the inner periphery of the fastening hole, if the thickness of the locking end is increased, the length at which the fastening screw and the screw groove are coupled is shortened, thereby reducing the fastening force. In addition, increasing the length of the fastening screw to improve fastening force requires additional manufacturing costs, which reduces economic efficiency. On the other hand, if the thickness of the stopping end is made small, there is a problem in that the stopping end is damaged due to excessive pressure when engaging between the upper part of the metal abutment and the head of the fastening screw.

Furthermore, there was a problem in that the fastening screw was dislodged into the oral cavity during the process of moving the fastening screw into the oral cavity. In addition, there was a problem of causing serious casualties due to the patient swallowing the dislodged fastening screw or inserting it into the airway.

Korean Patent Publication No. 10-2016-0095260

In order to solve the above problems, the present invention aims to provide a dental restoration set with improved manufacturing convenience and durability.

In order to solve the above problem, the present invention provides a set of dental restorations that are coupled to the upper side of a fixture implanted in the alveolar bone to replace lost teeth, wherein an occlusal surface that engages the opposing teeth is formed on the upper side and opens downward. An artificial tooth portion that is recessed and has an insertion groove in which a fixing protrusion protrudes downward from the inner surface. And a coupling protrusion screwed into a fastening groove formed at the top of the fixture, and a coupling protrusion provided integrally with the upper side of the coupling protrusion and inserted into the insertion groove, wherein the outer surface is molded so that rotation is restricted to the inner surface of the insertion groove. The post portion and the upper side of the post portion integrally protrude upward, and a fitting groove having an inner diameter smaller than the diameter of the fixing protrusion is formed to be recessed and opened upward so that the fixing protrusion is forcefully fitted inside, and corresponds to the diameter of the fixing protrusion. It includes an abutment including an elastic fixing part having a plurality of slot grooves spaced apart from each other along the circumferential direction to expand the elastic elasticity, wherein the fixing protrusion and the elastic fixing part are forcefully fitted and one of the inner and outer peripheral surfaces is in close contact along the circumferential direction. On the other side, a first stopping step protrudes in a radially outward direction, and on the other side, a second stopping step on which the first stopping step is caught and restrained protrudes in a radially inward direction, and the first and second stopping steps face each other up and down. A constraining contact surface is formed at the opposite end to intersect the direction of coupling of the artificial tooth portion and the abutment so that the first engaging step and the second engaging step are horizontally in surface contact and restrained by mutual engagement, and the opening of the fitting groove is formed at the opposite end. A set of dental restorations is provided, wherein the side border includes an extension portion inclined to allow the fixing protrusion to be inserted.

Here, an outer peripheral fitting portion protruding convexly in a radially outward direction is formed on the outer peripheral surface of the elastic fixing portion along the circumferential direction, and the spacing between the inner periphery of the insertion groove and the outer periphery of the fixing protrusion is less than or equal to the cross-sectional thickness of the elastic fixing portion. It is preferable to be formed as

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Meanwhile, an elastic deformation groove recessed in a radial inward direction is formed along the boundary between the post part and the elastic fixing part, and the slot groove extends and is recessed to the lower side of the elastic deformation groove, and is formed in a circumferential direction on the outer surface of the post part. Accordingly, it is preferable that at least one alignment surface is formed as a non-continuous surface with the outer periphery of the post portion, and an alignment groove into which the alignment surfaces are fitted is formed on the inner surface of the insertion groove.

Through the above solutions, the present invention provides the following effects.

First, the fixing protrusion protruding on the inner periphery of the artificial tooth part is drawn into the inner periphery of the elastic fixing part divided through the slot groove at the upper part of the abutment, forming a structure that is forcefully fitted through the elastic restoring force, making it strong without a separate fastening screw. Because it is tightly coupled, accidents due to separation or separation of the fastening screw can be prevented in advance.

Second, as the elastic fixing part is deformed, it is inserted into the insertion hop and then engaged and joined through the first and second latching steps protruding from the fixing protrusion and the opposing inner and outer peripheral surfaces of the elastic fixing part, and the upper and lower ends of each latching step are opposite to each other. The artificial tooth portion can be firmly coupled to the abutment by being formed to contact the surface horizontally and thereby constraining the assembled state.

Third, alignment surfaces and alignment grooves are formed on the opposing inner and outer peripheral surfaces of the abutment and the insertion groove, so that the artificial tooth can be coupled to the abutment in the correct direction, and a fastening hole structure for insertion of the fastening screw is provided. By substantially removing it, the thickness of the occlusal surface can be secured and durability against occlusal pressure can be significantly improved.

1 is an exploded cross-sectional view of a dental restoration set according to an embodiment of the present invention.
Figure 2 is a perspective view of an abutment according to an embodiment of the present invention.
Figure 3 is an assembled cross-sectional view of a dental restoration set according to an embodiment of the present invention.
Figure 4 is an assembled cross-sectional view of a modified example of a dental restoration set according to an embodiment of the present invention.
Figure 5 is an exploded cross-sectional view of a dental restoration set according to another embodiment of the present invention.
Figure 6 is a perspective view of an abutment according to another embodiment of the present invention.
Figure 7 is an assembled cross-sectional view of a dental restoration set according to another embodiment of the present invention.

Hereinafter, a dental restoration set according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

Figure 1 is an exploded cross-sectional view of a dental restoration set according to an embodiment of the present invention, Figure 2 is a perspective view of an abutment according to an embodiment of the present invention, and Figure 3 is a dental restoration set according to an embodiment of the present invention. This is an assembled cross-sectional view of the set.

As shown in Figures 1 to 3, the dental restoration set 100 according to an embodiment of the present invention includes an artificial tooth portion 10 and an abutment 20.

At this time, in the present invention, the dental restoration set 100 refers to parts manufactured or prepared to replace lost teeth, and is placed on the upper side of the fixture 1 installed in the alveolar bone 3 of the target arch requiring tooth restoration. The joint is fixed. Meanwhile, in this embodiment, the artificial tooth unit 10 is described and shown as being in the form of a single crown, but the artificial tooth unit 10 may be provided in a form in which a plurality of artificial teeth are connected along the row of teeth depending on the number of missing teeth. . For example, the artificial tooth unit 10 may be provided in a form in which two or three teeth are connected along the row of teeth and are supported on the alveolar bone 3 through at least two fixtures 1. Of course, in some cases, in the case of edentulous patients, the artificial tooth portion (10) is connected along the entire dentition from the incisors to both molars to replace the lost teeth as a whole, but is supported on the alveolar bone (3) through a plurality of fixtures (1). It may also be provided as, and such modifications fall within the scope of the present invention.

That is, the artificial tooth unit 10 is manufactured corresponding to the number of missing teeth, and the abutment 20 and the fixture 1 are prepared in numbers capable of stably supporting the artificial tooth unit 10. You can.

In detail, it is preferable that the artificial tooth portion 10 has an occlusal surface 11 formed on the upper side to occlude with opposing teeth. The occlusal surface 11 may be individually formed with a characteristic protruding structure to stably occlude with the chewing surface of the opposing teeth. When tooth restoration is performed simultaneously on the upper and lower jaw, the occlusal surface 11 may be used as a preset artificial tooth. It can be formed in response to standard design information.

It is preferable that an insertion groove 12 is formed in the lower part of the artificial tooth portion 10. The insertion groove 12 is preferably formed by opening the lower side of the artificial tooth portion 10, that is, the portion corresponding to the tooth root, and recessing it upward. At this time, the depth of the insertion groove 12 is preferably formed less than the total height of the artificial tooth portion 10, and therefore the insertion groove 12 may be formed in a groove shape that does not penetrate toward the occlusal surface 11. there is. Through this, the occlusal surface 11 can be clearly formed on the artificial tooth portion 10, so that even if the artificial tooth portion 10 is exposed to the outside, it provides an appearance similar to a real tooth, so aesthetics can be significantly improved. . In addition, durability can be improved by preventing damage or fracture of the occlusal surface 11 due to occlusal pressure when engaging with the opposing teeth, and the formation of through holes prevents foreign substances from penetrating inside. Hygiene and cleanliness can be significantly improved.

At this time, it is preferable that the fixing protrusion 13 protrudes downward from the inner surface of the insertion groove 12. The inner surface of the insertion groove 12 is preferably understood as the opposing surface of the opening of the insertion groove 12. In detail, the fixing protrusion 13 is preferably formed to have an outer diameter less than the inner circumference of the insertion groove 12 and protrudes to a length less than the depth of the insertion groove 12. Accordingly, a coupling space 17 may be formed between the inner circumference of the insertion groove 12 and the outer circumference of the fixing protrusion 13. The coupling space 17 is a part where the elastic fixing part 23 of the abutment 20, which will be described later, is inserted, which will be described later.

The artificial tooth portion 10 may be made of an oligomer synthetic resin material that can be printed using a 3D printer. Alternatively, the artificial tooth portion 10 may be made of zirconia, and the structure of the occlusal surface 11 and the insertion groove 12 can be molded, although it is not limited as long as it is a material used to manufacture artificial teeth for normal tooth restoration. It is desirable that it be made of a material that can support the occlusal pressure while doing so.

The abutment 20 is preferably understood as a tooth restoration component used to connect the fixture 1 and the artificial tooth portion 10. The abutment 20 is preferably made of a metal material to be firmly coupled to the artificial tooth portion 10 and the fixture 1 and to maintain a stable coupled state. For example, the abutment 20 may be made of titanium or titanium alloy, which has high strength and is biocompatible. Here, the abutment 20 preferably includes a coupling protrusion 21, a post part 22, and an elastic fixing part 23.

In detail, the engaging protrusion 21 is a part screwed into the fastening groove 2 formed at the top of the fixture 1, and is integrated with the lower end of the cuff part 20b wrapped by the gum 4, which is soft tissue. It is preferable that it is provided with a protrusion.

In addition, the post part 22 is a part inserted into the insertion groove 12 formed in the artificial tooth part 10, and a margin part 20a is formed between the cuff part 20b and the post part 22. It is desirable that is formed. The margin portion 20a corresponds to the boundary of the gum 4 and is a portion where the lower edge of the artificial tooth portion 10 contacts. Therefore, when the abutment 20 is fastened to the fixture 1 and the artificial tooth portion 10 is coupled to the abutment 20, the remaining parts except the artificial tooth portion 10 are connected to the gum. As it is not exposed to the outside of (4), the aesthetics can be improved.

At this time, it is preferable that at least one alignment surface 24 is formed on the outer surface of the post portion 22 along the circumferential direction. Hereinafter, the post portion 22 is described and shown as having a conical shape, and therefore, the outer surface of the post portion 22, which will be described later, and the outer peripheral surface of the post portion 22 are preferably understood to have the same meaning. In addition, it is preferable that the circumferential direction and the circumferential direction of the post portion 22, which will be described later, are understood to have the same meaning.

In detail, the alignment surface 24 may be formed of a plurality of decut surfaces along the circumferential direction of the post portion 22, and the alignment surface 24 may be equally divided along the outer peripheral surface of the post portion 22. It can be formed by cutting at points. Of course, depending on the case, the alignment surfaces 24 may be formed alternately at predetermined intervals along the outer peripheral surface of the post portion 22, or may be formed by cutting at a point corresponding to one direction. This alignment surface 24 may be formed as a non-continuous surface with the overall outer peripheral surface of the post portion 22. In addition, it is preferable that an alignment groove 14 into which the alignment surface 24 is fitted is formed on the inner surface of the insertion groove 12.

Through this, it is possible to prevent the artificial tooth part 10 from rotating arbitrarily while the artificial tooth part 10 is fastened to the upper part of the abutment 20. In addition, the artificial tooth portion 10 can be oriented so that it is coupled in the correct direction through the matching relationship between the alignment surface 24 and the alignment groove 14. Accordingly, the occlusal precision between the occlusal surface 11 and the opposing teeth can be significantly improved.

The elastic fixing part 23 is preferably integrally protruded upward on the upper side of the post part 22, and is preferably recessed so that an insertion groove 23a therein is opened upward. The fixing protrusion 13 is fitted into the fitting groove 23a, and the inner diameter of the fitting groove 23a is formed to be smaller than the outer diameter of the fixing protrusion 13 so that the fixing protrusion 13 is forcefully fitted. desirable. In addition, it is preferable that a plurality of slot grooves 27 are formed spaced apart along the circumferential direction of the elastic fixing part 23 so that the inner circumference of the elastic fixing part 23 is elastically expanded corresponding to the diameter of the fixing protrusion 13. do. Here, the inner circumference of the elastic fixing part 23 is preferably understood to have the same meaning as the inner circumference of the fitting groove 23a.

Through this, when the fixing protrusion 13 is inserted into the fitting groove 23a, the elastic fixing part 23 may spread radially outward and expand the inner circumference of the fitting groove 23a. And, when the insertion of the fixing protrusion 13 is completed, each divided elastic fixing part 23 can be firmly fixed to the outer periphery of the fixing protrusion 13 through the restoring force of the elastic fixing part 23. .

In this way, according to the present invention, the artificial tooth portion 10 and the abutment 20 can be easily combined without any additional members such as fastening screws. Accordingly, problems such as durability and hygiene caused by the formation of a through hole in the artificial tooth portion 10 can be fundamentally solved. In addition, the problem of the fastening screw being separated from a tool such as an attachment means or driver during the process of moving the fastening screw into the oral cavity can be fundamentally eliminated. Through this, the safety of the procedure can be significantly improved by preventing serious casualties due to insertion of the fastening screw into the patient's esophagus or trachea.

Moreover, the coupling protrusion 21 connecting the fixture 1 and the abutment 20 is also formed integrally with the abutment 20. Accordingly, the number of parts used to couple the dental restoration set 100 to the fixture 1 can be minimized to only two. Therefore, the man-hours and time required for dental restoration treatment can be significantly shortened, and the patient's discomfort can be significantly reduced through rapid tooth restoration.

Meanwhile, it is preferable that a first locking step 15 is protruded in a radial outer direction on one of the inner and outer peripheral surfaces where the fixing protrusion 13 and the elastic fixing part 23 are press-fitted and in close contact along the circumferential direction. In addition, on the other surface, it is preferable that a second engaging step 25, which engages with and is restrained by the first engaging step 15, protrudes in a radial inward direction.

In detail, the first stopping step 15 preferably protrudes from the outer periphery of the fixing protrusion 13, and may be formed to protrude radially outward along the protruding lower end of the fixing protrusion 13. In addition, the second locking step 25 preferably protrudes from the inner periphery of the elastic fixing part 23, and is preferably formed to protrude in a radial inward direction along the inner periphery of the upper end of the elastic fixing part 23.

And, when the post part 22 is inserted into the insertion groove 12 and the elastic fixing part 23 is inserted into the coupling space 17, the elastic fixing part 23 is the first engaging step ( 15) The bullet is expanded to correspond to the outer diameter. And, when the second locking step 25 slides along the outer surface of the first locking step 15 and is disposed between the inner surface of the insertion groove 12 and the first locking step 15, the elastic fixing portion As the inner circumference of (23) is restored, the first engaging step 15 and the second engaging step 25 may be engaged and coupled. Accordingly, the artificial tooth portion 10 can be firmly fixed to the abutment 20 without a separate adhesive or fastening screw.

Here, the coupling space 17 has a clearance spaced at a predetermined distance from the outer surface of the elastic fixing part 23 to ensure space for the elastic expansion of the elastic fixing part 23 in the radial outer direction. It is preferable that it is formed by further including.

Moreover, the first engaging step 15 and the second engaging step 25 have opposite ends facing up and down, and have a constraining contact surface ( 16,26) is preferably formed. At this time, the fact that the constraining contact surfaces (16, 26) intersect the coupling direction is preferably understood to mean that the constraining contact surfaces (16, 26) are formed to form an angle perpendicular to the coupling direction or close to a right angle. For example, the constraining contact surface of the first engaging step 15 (hereinafter referred to as first constraining contact surface 16) and the constraining contact surface of the second engaging step 25 (hereinafter referred to as second constraining contact surface 26) are perpendicular to the coupling direction. It is desirable to be formed to achieve this. Alternatively, the first constraining contact surface 16 is formed at an acute angle with the outer circumference of the first stopping step 15, and the second constraining contact surface 26 is formed at an acute angle with the inner circumference of the second engaging step 25. It may be formed as

Moreover, the outer circumference of the protruding end of the fixing protrusion 13 can be formed to have a narrow end diameter through fillet processing, etc., and the opening edge of the fitting groove 23a allows the fixing protrusion 13 to be easily fixed. The expansion portion may be formed to be inclined to be retracted. Accordingly, the fixing protrusion 13 on which the first locking step 15 and the second locking step 25 are formed, respectively, and the elastic fixing part 23 can be substantially coupled in the form of a ratchet gear.

Accordingly, the present invention is such that the artificial tooth portion 10 is randomly separated and separated after being coupled to the abutment 20 through contact between the first constraining contact surface 16 and the second constraining contact surface 26. can be prevented. That is, a simple method in which the first locking step 15 and the second locking step 25 are engaged and restrained with each other enables a firm connection between the dental restoration set 100, and thus the convenience of fastening and structural stability can be significantly improved. there is.

Meanwhile, it is preferable that the elastic deformation groove 29 is recessed in the radial inward direction along the boundary between the post part 22 and the elastic fixing part 23. The elastic deformation groove 29 is formed along the outer periphery of the boundary between the post portion 22 and the elastic fixing part 23, and the cross-sectional thickness of the lower end of the elastic fixing part 23 may be relatively small. Accordingly, when the fixing protrusion 13 is inserted into the fitting groove 23a, each part of the elastic fixing part 23 divided through the slot groove 27 can be easily expanded in the radial outward direction.

At this time, the slot groove 27 may be extended and recessed to the lower side of the elastic deformation groove 29. That is, the slot groove 27 may be formed in a groove shape that is recessed to the top of the post portion 22. Therefore, when the fixing protrusion 13 is inserted into the fitting groove 23a, the elastic fixing part 23 is easily elastically expanded, and the post portion 22 and the elastic bullet deformation groove 29 are formed. Durability can be improved by preventing excessive pressure from being transmitted outside the boundary of the foot fixing portion 23.

In this way, in the present invention, the artificial tooth portion 10 can be coupled to the abutment 20 through interference fit between the inner peripheral surface of the elastic fixing portion 23 and the outer peripheral surface of the fixing protrusion 13. In addition, as the first engaging step 15 and the second engaging step 25 are engaged, the coupling strength between the artificial tooth portion 10 and the abutment 20 is supplemented, and fastening rigidity can be significantly improved. .

Figure 4 is an assembled cross-sectional view of a modified example of a dental restoration set according to an embodiment of the present invention. In this modified example, the basic configuration of the dental restoration set 100B except for the fixing protrusion 213 and the elastic fixing portion 223 is the same as the above-described embodiment, so detailed description of the same configuration will be omitted.

As shown in FIG. 4, the first stopping step 215 may protrude radially outward along the circumferential direction at the longitudinal center portion of the fixing protrusion 213. The protruding upper edge of the first stopping step 215 may function as the first constraint contact surface. In addition, a locking groove 225a into which the first locking step 215 is inserted may be formed on the inner periphery of the elastic fixing part 223, recessed in a radial outward direction along the circumferential direction. At this time, the upper edge formed when the locking groove (225a) is depressed in the inner periphery of the fitting groove (223a) may function as the second locking step (225). Additionally, the upper inner surface of the locking groove 225a may function as the second constraining contact surface.

That is, if the artificial tooth portion 210 and the abutment 220 are coupled to each other through engagement between the first locking step 215 and the second locking step 225, the first locking step ( 215) and the second locking step 225 may be formed at various positions along the longitudinal direction of the fixing protrusion 213 and the longitudinal direction of the elastic fixing part 223.

Moreover, when the first locking step 215 is inserted into the locking groove 225a, it prevents the artificial tooth portion 210 from slightly moving up and down, so that the artificial tooth portion 210 and the abutment ( 220) The coupling precision between the two can be further improved.

Of course, in some cases, the locking groove is formed to be recessed in a radial inward direction along the inner periphery of the fixing protrusion 213, and the upper edge formed by the locking groove being depressed in the fixing protrusion 213 is the first locking step. It can function. In addition, the second locking step may protrude radially inward along the circumferential direction from the inner circumference of the elastic fixing portion, and such modifications fall within the scope of the present invention.

Figure 5 is an exploded cross-sectional view of a dental restoration set according to another embodiment of the present invention, Figure 6 is a perspective view of an abutment according to another embodiment of the present invention, and Figure 7 is a dental restoration set according to another embodiment of the present invention. This is an assembled cross-sectional view of the set. In this embodiment, the basic configuration of the dental restoration set (100A) except for the fixing protrusion 113 and the elastic fixing portion 123 is the same as the above-described embodiment, so a basic description of the same configuration will be omitted.

As shown in FIGS. 5 to 7, an outer fitting portion 128 protruding convexly in a radially outward direction may be formed on the outer peripheral surface of the elastic fixing portion 123 along the circumferential direction. In addition, the insertion groove 112 is the gap between the inner circumference and the outer circumference of the fixing protrusion 113, that is, the coupling space 117 is the cross-sectional thickness of the elastic fixing part 123 including the outer fitting part 128. It can be formed as follows. That is, as the thickness of the outer fitting part 128 corresponds to or exceeds the clearance included in the coupling space 117, the overall thickness of the elastic fixing part 123 is larger than the coupling space 117. It can be formed relatively small.

Accordingly, the fixing protrusion 113 can be forcefully fitted into the inner periphery of the fitting groove 123a through a restoring force after the elastic fixing part 123 is elastically deformed in the radial outward direction. At the same time, when the fixing protrusion 113 is inserted into the fitting groove 123a, the elastic fixing part 123 expands radially outward and enters the coupling space 117. Here, since the cross-sectional thickness of the elastic fixing part 123 is thicker than the cross-sectional gap between the coupling spaces 117, not only the inner circumference but also the outer circumference of the elastic fixing part 123 is pressed into the inner circumference of the coupling space 117 at the same time. It can be.

Through this, the shapes of the artificial tooth portion 110 and the abutment 120 are simplified while the bonding force is improved, so that manufacturing convenience, speed, and fastening robustness can be significantly improved.

Meanwhile, terms such as “include,” “comprise,” “equip,” or “have,” as used above, mean that the corresponding component may be present, unless specifically stated to the contrary. Rather than excluding a component, it should be interpreted as allowing additional inclusion of other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology and, unless explicitly defined in the present invention, should not be interpreted in an idealized or overly formal sense.

As described above, the present invention is not limited to the above-described embodiments, and modifications and implementations can be made by those skilled in the art without departing from the scope of the claims of the present invention. And such modifications fall within the scope of the present invention.

1: Fixture 10: Artificial tooth section
12: Insertion groove 13: Fixing protrusion
20: Abutment 22: Post portion
23: bullet fixing part 27: slot groove
100: Tooth restoration set

Claims (5)

In a set of dental restorations coupled to the upper side of a fixture implanted in the alveolar bone to replace lost teeth,
An artificial tooth portion having an occlusal surface for mating with opposing teeth formed on the upper side and an insertion groove formed with a depression formed to open downward and a fixing protrusion protruding downward from the inner surface; and
A coupling protrusion screwed into a fastening groove formed at the top of the fixture, and a post provided integrally with the upper side of the coupling protrusion and inserted into the insertion groove so that the outer surface is rotationally restricted to the inner surface of the insertion groove. The portion and the post portion are integrally protruded upward on the upper side, and a fitting groove having an inner diameter smaller than the diameter of the fixing protrusion is formed to be recessed and opened upward so that the fixing protrusion is forcefully fitted therein, corresponding to the diameter of the fixing protrusion. It includes an abutment including an elastic fixing portion in which a plurality of slot grooves are formed spaced apart along the circumferential direction to expand the elastic material,
A first locking step protrudes in a radial outer direction on one side of the inner and outer peripheral surfaces where the fixing protrusion and the elastic fixing part are forcefully fitted and in close contact along the circumferential direction, and a second locking step on which the first locking step is caught and restrained is on the other side. The artificial teeth are protruded in a radial inward direction, and the first engaging step and the second engaging step face each other at the opposite ends facing upward and downward so that the first engaging step and the second engaging step are horizontally in surface contact and mutually engaged. A set of dental restorations, wherein a restraining contact surface is formed to intersect the coupling direction of the abutment, and the edge of the opening side of the fitting groove includes an extension portion inclined to allow the fixing protrusion to be inserted. delete delete According to claim 1,
On the outer peripheral surface of the elastic fixing part, an outer peripheral fitting portion protruding convexly in a radially outward direction is formed along the circumferential direction,
A set of dental restorations, characterized in that the spacing between the inner periphery of the insertion groove and the outer periphery of the fixing protrusion is formed less than or equal to the cross-sectional thickness of the elastic fixing part. According to claim 1,
An elastic deformation groove recessed in a radial inward direction is formed along the boundary between the post portion and the elastic fixing portion, and the slot groove extends and is recessed to the lower side of the elastic deformation groove,
A set of dental restorations, characterized in that at least one alignment surface is formed along the circumferential direction on the outer surface of the post part as a non-continuous surface with the outer circumference of the post part, and an alignment groove in which the alignment surface is fitted is formed on the inner surface of the insertion groove. .