KR20190043697A - Abutment for implant - Google Patents

Abstract

The present invention relates to an implant abutment, which comprises: a fixture engaging portion inserted into a fixture to be implanted on the alveolar bone; a margin portion formed to extend upward from the fixture engaging portion; and a crown engaging portion formed to extend upward from the margin portion and having a crown engaged with an outer circumferential surface thereof. The margin portion includes a margin extending upward from an upper end of the fixture engaging portion and protruding at a predetermined pitch along the outer circumferential surface of the margin portion. The outer circumferential surface of the crown engagement portion is formed of a polygonal shape.

Description

[0001] ABUTMENT FOR IMPLANT [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an abutment for an implant, and more particularly, to an abutment for an implant, in which a spiral margin is formed on an outer circumferential surface of an abutment for mounting a crown, The spiral marginal portion exposed to the upper surface of the gingiva in a combined state can be easily cut and removed so that the procedure of making the upper end of the margin portion coincide with the surface of the gum can be performed accurately and easily, And to improve the esthetics of the gums after the implant.

Generally, a dental implant is a biocompatible material that is applied to the jawbone which is bulky enough to be wrapped sufficiently by bone grafting, osteogenesis, and other operations on the tooth defective area or the jawbone of the tooth extraction site It is a dental treatment technique that restores the function of the natural teeth by implanting the implant body.

In the early 20th century, metal implants made of gold, silver, lead, iridium, iron, and cobalt alloys were used in the early 16th and 17th centuries, and artificial teeth made of gold and ivory were used. Developed.

Since the 1940s, suborbital implants and titanium blade implants have been developed and popularized but have a short life span and a low success rate. Since 1982, Branemark, Sweden, in Toronto, Canada, has published bone anchoring implants for 15 years, with a success rate of more than 90%.

Such an implant implies a substitute that restores when the tissue of the human body is lost, but refers to an artificial tooth implant in a dentist.

That is, an implant is made by implanting an artificial root fixture made of titanium, which does not have a rejection reaction to the human body, on an alveolar bone that has been extracted from a natural tooth, so as to replace the root of the lost natural tooth, It is a cutting-edge procedure that restores the original function of a natural tooth by fixing a crown.

The dental implant is composed of a fixture to be placed on the alveolar bone, an abutment to be fastened to the fixture, and a crown of a real tooth shape to be mounted on the abutment.

Then, a cover screw and a healing cap for finishing a screw hole formed inside the upper portion of the fixture, a healing abutment called a healing zone, a fixture and a butt And an abutment screw that connects the spindle to the spindle.

Here, a fixture corresponding to a root is referred to as an artificial root, a tooth or a fixture in the art, an abutment is also referred to as abutment or abutment, and a crown corresponding to a tooth is an artificial tooth, Also called crown, prosthesis.

Such implants have threaded implants and cylindrical implants, depending on the shape of the implants.

Screw type implants are most preferred at present because they have threads in the implant fixture and have a large initial contact force and a large contact area with the bone, which is advantageous for implant stability and favorable dispersion of occlusal load.

Cylindrical implants also acquire stability from the surface of the implant fixture and also from the structural differences in the jawbone and implant diameters.

In the meantime, the implant includes an implant in the bone, which is placed in the jawbone according to the placement position, an implant in the form of a button in the form of a soft tissue, a fixture and an abutment suitable for the surface of the jawbone under the periosteum, And implants that penetrate through the bone, and implants that are fixed through the root canal after root canal treatment (nerve treatment) of natural teeth.

Implants can be implanted immediately, depending on the time of implantation. Immediate implantation is performed immediately after extraction, delayed immediate implantation is performed between 6 and 10 weeks after extraction, and late implantation is performed after 3 to 6 months of extraction.

In addition, according to the operation method, there is a single operation method in which the implant root, that is, the fixture and the upper tooth portion, that is, the abutment, is simultaneously placed according to the surgical method. After implanting the fixture of the implant first, the implant is waited for adhesion with the bone, There are two surgical procedures to place the.

Conventional techniques for dental implants having various types and procedures are disclosed in Korean Patent Application Publication No. 10-0419738 entitled " Dental Implant System " and Korean Patent Application Publication No. 10-0677870 Abutment and dental implant with the abutment, "and" implant for flapless operation or mini-flap operation "of Korean Patent Registration No. 10-0879777.

In the meantime, we will briefly discuss the most common methods of operation of screw-type implants.

First, partial anesthesia is performed using an anesthetic syringe on the area of the gum where the fixture is to be placed, and the gingiva is cut to a length of 3 to 5 mm using a mass.

Then, after the incised gum is opened to the diameter of the fixture to form an inlet, the position where the fixture is to be placed is determined and then drilling is carried out to form a screw hole to be inserted into the alveolar bone.

Thereafter, a plurality of drills are performed until the size of the fixture becomes a size corresponding to the fixture diameter, and a fixture is screwed onto the screw hole and is placed in the alveolar bone. At this time, the upper surface of the fixture is parallel to the surface of the alveolar bone.

Here, when the operation is to be performed by a two-operation method in which the gum is completely covered and closed so that the fixture can not be seen according to the judgment of the operator, the cover screw is fully inserted into the screw hole of the placement part, and the upper surface of the cover screw is fixed to the alveolar bone Parallel to the surface and the plane portion of the mounting portion.

Then, the incision of the incised gum is sutured to complete the first-stage operation by having the fixture and the cover screw in the gum.

The healing time for fixation and alveolar bone fixation after the first stage operation is at least 2 ~ 3 months for the lower jaw and 4 ~ 6 months for the upper jaw.

If the alveolar bone at the site of implantation is weak, it takes one to two months longer. Bone grafting usually requires a healing period of 6 to 9 months.

Here again, if it is judged that the fixture has been fully healed after the placement, a second stage operation is performed.

The second stage surgery is usually performed by local anesthesia. After the anesthesia, the gums are opened, the gums are opened to see the fixtures, the satisfactory osseointegration is checked, the cover screws are removed, and a healing cap cap or healing abutment, and suture the gums.

When the gums are healed, the healing cap or healing abutment is removed and the abutment for crown attachment is combined. After the tooth modeling and crown punching process, the crown is finally attached to the abutment to complete the implant procedure It will be done.

In the procedure of the conventional screw type implant, the upper part of the margin formed on the outer circumferential surface of the abutment to be engaged with the abutment for crown mounting is aligned with the surface of the gum.

Here, as a conventional technique of implant abutment, there are a 'implant abutment' of Korean Patent Registration No. 10-0970746 and a 'custom tooth of implant' of Korean Patent Registration No. 10-0898726 And a "implant abutment" of Korean Patent Application Publication No. 10-2011-0096612 have been disclosed.

Hereinafter, the construction of the conventional abutment will be described in order to explain a procedure of making the margin top of the abutment coincide with the surface of the gum.

As shown in FIG. 1, a conventional abutment 100 coupled to an upper portion of a fixture 200 placed in a hole 410 of an alveolar bone 400 is formed so that the diameter of its outer circumferential surface becomes smaller as it goes downward A fixture engaging portion 110 inserted into the insertion hole 210 of the fixture 200 and a fixture engaging portion 110 extending from an upper end of the fixture engaging portion 110 and having an outer peripheral surface having a larger diameter, And a crown coupling part 120 extending from an upper end of the margin part 130 and having a smaller diameter as the diameter of the outer circumferential surface increases toward the upper side and on which the crown 300 is mounted.

In the conventional abutment 100 having the above structure, when the fixture insertion portion 110 of the abutment 100 is inserted into the insertion hole 210 of the fixture 200, (130).

The healed gum 420 has the same shape as the outer circumferential surface of the healing cap or healing abutment and is usually healed in the shape of a circular hole to come into contact with the circumferential surface of the margin 130 of the abutment 100 will be.

If the upper surface of the margin 130 of the abutment 100 is not aligned with the surface of the gum 420, the margin 130 of the abutment 100 positioned between the gum 420 and the crown 300 The outer surface of the gum 420 is exposed and the outer surface of the gum 420 is in contact with the upper surface of the gum 420 because the outer surface of the gum 420 is exposed.

Here again, the thickness of the gums 420 varies from person to person, but is less than 1 mm for gum recession patients, typically 2 to 3 mm thick, and has gums 420 of up to 7 mm in thickness. In addition, the thickness of the gum 420 may vary depending on the region of the gum 420.

As the thickness of the gum 420 is not constant, the margin 130 of the abutment 100 is aligned with the surface of the gum 420 in order to align the upper edge of the margin 130 of the abutment 100 with the surface of the gum 420. [ And a cutting process is performed.

The procedure of cutting the margin 130 of the abutment 100 is as follows. First, the operator checks whether each portion of the gums 420 radially contacting the periphery of the margin 130 is high or low, The upper and lower surfaces of the gums 420 and the upper and lower sloping surfaces of the gums 420 are aligned with the upper and lower surfaces of the gums 420, respectively.

However, in the procedure of cutting the margin 130 of the conventional abutment 100, it is troublesome to repeatedly cut the upper and outer circumferential surfaces of the margin 130 according to the height of the gum, When the cutting surface is excessively cut in the repeated cutting process, there is a problem that the abutment needs to be replaced and replaced again.

KR Patent Registration No. 10-0970746 (Jul. 2010) Abutment for implant. A modified abutment structure of an implant. KR Patent Application Publication No. 10-2011-0096612 (Aug. 31, 2011) Abutment for implant. KR Patent Registration No. 10-0419738 (Feb. 10, 2004) Dental implant system. KR Patent Registration No. 10-0677870 (Jan. 26, 2007) Healing abutment and a dental implant having the same. Implant for flapless or mini - flap procedure.

The present invention has been made to solve the problem of a procedure of cutting a margin portion of a conventional abutment for matching the upper edge of the abutment portion of the abutment and the surface of the gum and has a spiral margin portion formed on the outer circumferential surface of the abutment The spiral margin portion exposed to the upper surface of the gum in a state where the abutment is coupled to the fixture can be easily cut and removed so that the procedure of making the upper end of the margin portion coincide with the surface of the gum can be performed accurately and easily And to provide a new type of abutment for implant that can improve the esthetics of the gums after the implant procedure.

Further, in the conventional abutment in which the crown-coupled portion of the abutment to which the crown is engaged is made flat, in the case where the crown is coupled to the engagement portion of the abutment, Thereby preventing the problem that the combined crown rotates.

In addition, the present invention relates to a problem that when a abutment is combined with a fixture, a stress generated due to a chewing activity of a user is concentrated on a part of a fixture engaging portion of the abutment to cause an abutment to fracture Which is a problem to be solved.

SUMMARY OF THE INVENTION In order to solve the above-described problems, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a fixture that is inserted into the fixture to be inserted into the alveolar bone, And a crown-coupled portion to which the crown is coupled, wherein the margin portion includes a margin extending upward from an upper end of the fixture-engaging portion and protruding at a predetermined pitch along the outer circumferential surface of the margin portion, and the outer circumferential surface of the crown- The present invention provides an abutment for an implant, which is characterized in that it is an implantable abutment.

Further, in the present invention, the margin is formed so that the diameter of the outer circumferential surface becomes smaller toward the upper side. The present invention provides an abutment for an implant.

The present invention also provides an abutment for an implant, wherein the lower surface of the margin is flat.

Further, the lower surface of the margin is provided so as to be in parallel with the upper surface of the fixture. [0012] The present invention provides an abutment for an implant.

In addition, the pitch of the implant is 0.5 to 1 mm. The present invention provides an abutment for an implant.

The present invention provides a spiral marginal portion on the outer circumferential surface of the abutment so that the spiral marginal portion exposed above the surface of the gum in a state where the abutment is coupled to the fixture can be easily cut and removed, So that the process of matching the surface with the surface can be performed accurately and easily.

Further, according to the present invention, the outer circumferential surface of the crown engagement portion may be formed in a polygonal shape to prevent the crown of the abutment from rotating.

Further, according to the present invention, the end face of the fixture engaging portion of the abutment is made smaller

Fig. 1 shows a conventional abutment for an implant.
2 is a perspective view of an implant abutment according to an embodiment of the present invention.
3 is a cross-sectional view of an implant abutment according to an embodiment of the present invention.
4 is a cross-sectional view illustrating a state in which an abutment for an implant according to an embodiment of the present invention is coupled to a fixture placed in an alveolar bone.
5 shows a cross section of various margins of an implant abutment according to an embodiment of the present invention.

Before describing the technical idea of the implant abutment of the present invention in detail, it is to be understood that the present invention is capable of various modifications and various embodiments, and that specific embodiments will be exemplified in the drawings and detailed in the description .

It should be understood, however, that it is not intended to be limited to the particular embodiments of the invention but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

For reference, terms such as first, second, A, B, and the like can be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component, Quot; is meant to include any combination of a plurality of related listed items or any one of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention.

The singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

In this application, the terms "comprises", "having", and the like are intended to specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

The same terms that are defined in commonly used dictionaries should be interpreted as having a meaning consistent with the contextual meaning of the related art and will be interpreted as an ideal or overly formal sense unless explicitly defined in the present application Do not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an implant abutment according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings,

In the detailed description, components having the same function are denoted by the same names or the same reference numerals.

In the drawings and the detailed description, the construction and operation of the implantable abutment which can be easily perceived by workers in the field are simplified or omitted.

Particularly, in the drawings and the detailed description of the drawings, detailed description and illustration of elements and structures of elements that are not directly related to the technical features of the present invention are omitted and only a technical structure related to the present invention is shown briefly .

In addition, in the drawings, there is a portion where the sizes of the elements are represented to be slightly different from each other, or the sizes of the components are different from each other. However, Therefore, a detailed description thereof will be omitted.

Hereinafter, preferred embodiments of an implant abutment according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view of an abutment for an implant according to a preferred embodiment of the present invention, FIG. 3 is a sectional view of an abutment for an implant according to a preferred embodiment of the present invention, and FIG. FIG. 5 is a cross-sectional view showing a state where an abutment for implant according to the present invention is coupled to a fixture placed on an alveolar bone.

2 to 4, an abutment for an implant according to an embodiment of the present invention includes a fixture engaging portion 14 inserted into an inside of a fixture to be inserted into an alveolar bone, an upper portion of the fixture engaging portion 14 And a crown engaging portion 12 formed to extend upward from the margin portion 13 and having a crown on an outer circumferential surface thereof, wherein the margin portion 13 is formed in the fixture engaging portion 13, And a plurality of margins extending upward from an upper end of the crown engaging portion 14 and protruding from the outer circumferential surface of the margin portion 13 at a constant pitch along the outer circumferential surface of the margin portion 13. The crown engaging portion 12 has a crown- (11).

The crown fixing portion 11 may be provided in a rectangular parallelepiped shape and is also shown in the drawing. However, the shape of the crown fixing portion 11 can be variously modified according to the needs of the user, The crown 30 fixed to the crown fixing portion 11 only needs to be fixed so that the crown fixing portion 11 does not move relative to the crown fixing portion 11, The scope of the rights of

The fixture engaging portion 14 is provided with a surface contact portion 141 which is fixed to the inner surface of the fixture 20 in a surface-to-surface contact manner and a thread line corresponding to a female screw provided inside the fixture 20, And a screw portion 143 for fixing the abutment to the fixture 20.

In particular, the surface contact portion 141 of the fixture engaging portion 14 may be inclined so that the diameter thereof becomes smaller toward the lower side.

This is because when the surface contact portion 141 of the fixture engaging portion 14 is provided so as not to be inclined as in the conventional abutment, the micturizing force generated when the patient chews the food after the implant is performed, Stress concentration occurs at the edge of the end of the inner upper surface of the fixture 20 and the abutment is fractured. In the fixture 20, The diameter of the contact portion 141 is smaller than the contact portion 141. When the contact portion 141 is coupled to the inner surface of the fixture 20 in a forced fit manner, stress concentration is not generated, It is possible to prevent fracture of the substrate.

The plurality of margins formed on the margin portion 13 of the embodiment may be provided such that the diameter of the outer circumferential surface decreases from the upper end of the fixture engaging portion 14 toward the upper end, And the diameter of the lower end of the outer circumferential surface may be larger than the diameter of the upper end of the fixture engaging portion 14. [

As a result, the lower end of the crown 30 can be positioned on the inclined surfaces of the plurality of margins formed on the margin portion 13, so that an empty space is formed between the margin portion 13 and the crown 30, It is possible to prevent the saliva from penetrating into the inside of the crown 30.

Further, since a plurality of margins are formed in the margin portion 13, the crown 30 can be mounted using a desired margin according to the condition of the patient's gums, thereby reducing the labor of the dentist performing the implant treatment exist.

On the other hand, in the case of the conventional abutment, since only one margin is provided as described above, when the dentist actually puts the gum on the patient, the margin is removed and the crown is mounted without margin, As a result, there is a problem that food or the like penetrates into the crown after the implant treatment, thereby causing corrosion.

Therefore, the abutment of the present invention can be regarded as having a technical feature in that it can solve this problem.

In the abutment for implant 10 according to the preferred embodiment of the present invention, the length of the margin 13 is preferably 2 mm to 7 mm.

It is preferable that the pitch P of the plurality of margins formed in the margin portion 13 is 0.5 mm to 1 mm.

Considering that the height of the gum 42 of a general person is 2 mm to 3 mm, the length of the margin portion 13 is 2 mm to 3 mm so that the cutting process can be simplified by allowing the gum 42 to contact the margin portion 13 as much as possible. Most preferably 7 mm.

Hereinafter, the procedure for coupling the implant abutment 10 of the present invention having the above-described configuration features to the fixture 20 will be described in detail.

The implant abutment 10 of the present invention is joined to the upper portion of the fixture 20 that is placed on the alveolar bone 40 in the site where the tooth is missing.

The abutment 10 of the present invention is inserted into the insertion hole 21 formed in the upper portion of the fixture 20 and is inserted into the gum 42 healed in the form of a circular hole by a healing abutment And a crown joining portion 12 to which the crown 30, which is an artificial tooth, is coupled.

And a screw portion 143 which is formed in the central axial direction of the abutment 10 and fixes the abutment 10 to the fixture 20 so as to be formed inside the fixture 20 and has a screw portion 143 To the female thread portion having the corresponding thread.

The upper end of the fixture engaging portion 14 extends upward from the upper end of the fixture engaging portion 14 and is integrally formed with the fixture engaging portion 14. A margin A portion 13 is formed.

Here, the gum 42 contacting the outer peripheral surface of the margin portion 13 will be described.

The gum 42 located around the upper surface of the fixture 20 is cut to place the fixture 20 in the alveolar bone 40 during the implant procedure.

When the fixture 40 is placed on the alveolar bone 40 and the healing cap or healing abutment (not shown) is coupled to the fixture 40, the incised portion of the gum 42 is inserted into the healing cap or healing abut And then sutured.

The incised portion of the gum 42 is cured while abutting against the outer circumferential surface of the healing cap or healing abutment for a period of time for osseointegration of the fixture 20. [

The portion of the healed gum 42 is healed in the shape of a circular hole and comes into contact with the periphery of the margin 13 of the abutment 10 for mounting the crown 30. [

After the implant abutment 10 according to the preferred embodiment of the present invention as described above is coupled to the fixture 20 placed on the alveolar bone 40, the margin portion exposed to the upper side of the surface of the gum 42 13 can be easily removed by simply cutting and removing the margin of the margin portion 13 and the upper surface of the margin of the margin portion 13 and the surface of the gum 42.

Here, a description will be made of a procedure of making the upper end of the margin portion 13 of the abutment 10 according to the present invention coincide with the surface of the gum 42.

First, in a state where the abutment 10 is coupled to the fixture 20, the practitioner confirms the height of the gum 42 contacting the margin portion 13 of the abutment 10.

At this time, when the gum 42 is in contact with the margin of the margin 13, the remaining margins continuously and spirally projecting on the margin are cut and removed, and the margins of the margin 13 and the gums The remaining margins are cut to complete the procedure.

When the crown 30 is attached after the margin portion 13 is cut and the procedure is simply completed, the lower surface of the crown 30 is brought into contact with the upper surface of the margin portion 13, The surface of the crown 30 coincides with the lower surface of the crown 30.

5 shows a cross section of various margins of an implant abutment according to an embodiment of the present invention.

Referring to FIG. 5A, a section 13-1 of the margin of the implant abutment according to an embodiment of the present invention may have a smaller diameter toward the upper part.

Referring to FIG. 5 (b), the diameter of the abutment for the implant according to an embodiment of the present invention is increased toward the center from the upper end 13-2 of the margin, , And the diameter may be reduced from the center to the bottom.

Referring to FIG. 5 (c), the end surface 13-3 of the margin of the implant abutment according to the embodiment of the present invention may be provided so as to have a smaller diameter toward the lower portion.

As described above, the cross-sections 13-1 to 13-3 of the margin of the implant abutment according to the embodiment of the present invention can be variously modified according to the needs of the user, Not limited.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the essential characteristics of the invention. will be.

Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings .

The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: abutment 20: piece 30: crown
12: crown engaging portion 13: margin portion 14: fixture engaging portion

Claims (5)

A fixture engaging portion inserted into the fixture to be placed on the alveolar bone;
A margin portion formed to extend upward from the fixture engaging portion; And
And a crown engaging portion formed to extend upward from the margin portion and having a crown coupled to an outer circumferential surface thereof,
The above-
And a plurality of margins extending upward from an upper end of the fixture engaging portion and protruding from the upper end of the fixture engaging portion at a constant pitch along an outer circumferential surface of the margin portion,
Wherein the crown coupling portion includes a crown retaining portion having a polygonal outer circumferential surface. ≪ RTI ID = 0.0 > 11. < / RTI > The method according to claim 1,
Wherein the margin is formed such that the diameter of the outer circumferential surface decreases toward the upper side. 3. The method of claim 2,
Wherein the lower surface of the margin is flat. The method of claim 3,
Wherein the lower surface of the margin is parallel to the upper surface of the fixture. The method according to claim 1,
Wherein the pitch is 0.5 to 1 mm.

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