KR20230079569A - Impression coping for dental implant surgery - Google Patents

Abstract

The present invention relates to an impression coping used to reproduce the position of an implant placed in the oral cavity in an extraoral stomatal work model. , It is about impression coping for implant surgery that can accurately implement a model by preventing deformation of the impression body when the impression body is reassembled to reproduce the groundbreaking work model after impression taking.

Description

Impression coping for implant surgery {IMPRESSION COPING FOR DENTAL IMPLANT SURGERY}

The present invention relates to an impression coping used to reproduce the position of an implant placed in the oral cavity in an extraoral stomatal work model. , It is about impression coping for implant surgery that can accurately implement a model by preventing deformation of the impression body when the impression body is reassembled to reproduce the groundbreaking work model after impression taking.

Whereas general prosthetics or dentures damage the surrounding teeth and bones over time, implants do not damage the surrounding tooth tissue and have the same function and shape as natural teeth, but do not cause cavities and can be used semi-permanently. There is an advantage.

In implant treatment, three-dimensionally accurate copying of the position of an implant placed in the oral cavity is very important in determining the accuracy of a fabricated pore (prosthesis). This is because a more accurate pore can be produced only when the exact location is secured.

In implant treatment, fabrication of a mechanical work model using impression coping is an essential item. The accuracy of groundbreaking work model production is greatly influenced by impression taking. The impression taking method using impression coping has usually been performed at the fixture level.

In general, the impression taking method at the fixture level is as follows. After coupling the impression coping to the upper part of the implanted fixture, covering it with a flexible impression material and scooping it out, the lab analog is fixed to the implanted impression coping on the impression body of the tooth model. Thereafter, a dental stone is poured to produce a tooth model, an abutment is fastened to the tooth model thus produced, and an impression process for producing a pore is performed using an impression material again.

Impression coping is generally divided into a main body and a screw part that enters the inside of the main body and fixes the main body to a fixture, and has a structure in which a driver hole is provided at the top of the screw. However, when impression taking is performed in the above-described manner using the impression coping having such a structure, the following problems occur.

First, when the process of covering the upper portion of the impression coping coupled to the fixture is performed, the impression material enters the driver hole, which deteriorates the accuracy of impression taking. After all, in order to take an accurate impression, it is necessary to separately temporarily block the driver hole of the impression coping before covering the impression material so that the impression material does not enter the driver hole, so the work for impression taking becomes cumbersome and complicated. In addition, the drive hole provided at the upper end of the impression coping usually has a hexagonal groove or a star-shaped structure. When the impression body is recombined with the impression coping outside the oral cavity after taking an impression, there is a problem that misalignment of the drive hole occurs due to the rotation of the screw. there is.

KR 10-0428935 B1, 2004. 04. 13. KR 10-1172838 B1, 2012. 08. 03. KR 10-2280897 B1, 2021. 07. 19.

Therefore, the present invention has been proposed to solve the above-mentioned general problems of the prior art.

An object of the present invention is to stably separate the impression body from the impression coping during the impression taking process, and to prevent deformation of the impression body when recombining the impression body to the impression coping in order to reproduce a groundbreaking model outside the mouth after impression taking. It relates to impression coping for implant surgery that can produce an accurate groundwork model.

In addition, the present invention is not limited to the above-mentioned purpose, and various other objects may be additionally provided through the techniques described through the following embodiments and claims.

The present invention according to an embodiment for achieving the above object is a main body having an inner surface in which the inner diameter decreases in the depth direction from the upper end of the hollow vertically penetrated; And an upper surface of the head is located on the inner lower portion of the main body, and provides an impression coping for implant treatment, characterized in that it comprises a fastening member for fixing the main body to the fixture.

In addition, the inner surface of the main body may have a structure in which an inner diameter decreases from an upper end of the hollow to an upper surface of the head.

In addition, a stepped portion for holding the lower end of the head is formed at the lower portion of the hollow, and the inner surface of the main body has a structure in which the inner diameter decreases from the upper end of the hollow to the upper surface of the stepped portion. .

In addition, the outer surface of the head may be characterized in that it is made of an inclined surface.

In addition, the inner diameter of the upper end of the hollow may be characterized in that it has a size less than twice the inner diameter of the hollow at the same height as the upper surface of the head.

In addition, the upper inner diameter of the hollow may be characterized in that it has a size less than twice the inner diameter of the hollow at the same height as the upper surface of the stepped portion.

In addition, a curved surface may be formed on the outer surface of the main body.

As described above, according to the impression coping according to the present invention, as the fastening member, that is, the head of the screw is fastened to the inner lower part of the impression coping, a driver hole is formed to prevent the impression material from entering the driver hole of the screw in the prior art. By solving the trouble of temporary filling, the workability can be improved by simplifying the impression taking work.

In addition, according to the impression coping according to the present invention, when the impression coping is recombined with the impression body copied from the impression coping after impression taking by providing an impression coping having a tapered shape such that the inner diameter decreases from the top to the depth direction, It can be stably combined without deformation of the impression body, so it is possible to accurately implement the groundbreaking work model.

That is, since the upper end of the impression coping is smoothly drawn into the inside of the impression body with the increased width and combined, when the impression coping is copied and the impression coping is recombined, it is possible to stably combine the impression coping without deformation of the impression body, thereby creating a groundbreaking work model. can be implemented accurately.

In addition, according to the impression coping according to the present invention, as the impression coping is formed in a structure in which the inner diameter decreases in the depth direction from the top end, the impression material is injected into the hollow part of the impression coping and copied, so that the impression body is reunited with the impression coping after impression taking. When doing this, it is possible to secure stability by firmly supporting the impression coping from the inside and outside.

1 is a cross-sectional view schematically illustrating an impression coping according to an embodiment of the present invention.
Figure 2 is a schematic diagram for comparing the embodiment of the present invention and comparative examples.
3 is a view schematically showing a modified example of impression coping according to an embodiment of the present invention.

Hereinafter, the advantages and features of the present invention, and methods for achieving them will become clear with reference to the embodiments described later in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, in order to fully inform those skilled in the art to the scope of the invention to which the present invention belongs. provided, the invention is defined by the scope of the claims.

Also, like reference numerals designate like elements throughout this specification. In addition, each component shown in each figure may be excessively illustrated in size and shape, which is for convenience of description and is not intended to be limited. In addition, the 'impression' mentioned throughout this specification refers to a process of imitating the appearance of tissues in the oral cavity for dental diagnosis and treatment, or a result thereof. 'Impression material' refers to materials used for impression, 'impression taking' refers to the process of imitating the oral cavity using impression material, and 'impression body' refers to the result obtained through the impression taking process.

In implant treatment, fabrication of a mechanical work model using impression coping is an essential item. Also, the accuracy of groundbreaking work model production is greatly influenced by impression taking. If an error occurs from the impression body acquired through impression taking, the prosthesis produced later does not fit in the oral cavity despite the stable fabrication of the groundbreaking work model, and the impression coping is inserted into the implant placed in the oral cavity from the beginning. There is a problem that needs to be raised and worked on. In the end, it is essential to obtain a proper impression body.

Accordingly, the present invention provides an impression coping capable of producing an impression body with a more robust and stable shape, through which the impression body can be easily separated from the impression coping, and an impression body to reproduce a groundbreaking work model outside the oral cavity after taking an impression. Provides an impression coping capable of preventing deformation of the impression body when recombination with the impression coping.

1 is a cross-sectional view schematically illustrating an impression coping according to an embodiment of the present invention.

Referring to FIG. 1, the impression coping according to the embodiment of the present invention is a main body 10 and a part of the lower part 11 of the main body 10 inserted into the fixture 1, the main body 10 It includes a fastening member 2 fixed to the fixture 1. At this time, the fastening member 2 may be a screw.

The main body 10 of the impression coping may have a tubular structure having a hollow 10a penetrating vertically so that the fastening member 2 is inserted therein. In addition, the inner surface 13 facing the hollow 10a has a structure in which the inner diameter decreases from the upper end 12 in the depth direction.

For example, the inner diameter d1 at the upper end 12 of the main body 10 of the impression coping may be the largest. In addition, the inner diameter of the main body 10 of the impression coping has a structure in which the inner diameter decreases in the depth direction from the upper end 12 to the first or second reference points ref1 and ref2.

The first reference point ref1 may be a point at the same height as the top surface of the head 2a in a state where the fastening member 2 is coupled to the inside of the main body 10 of the impression coping. The second reference point ref2 is a point at the same height as the upper surface of the stepped portion 14 formed to hold the head 2a in a state where the fastening member 2 is coupled to the inside of the main body 10 of the impression coping. can

The main body 10 of the impression coping may have a structure in which the inner diameter of the inner surface 13 decreases from the upper end 12 toward the first or second reference points ref1 and ref2. That is, the inner surface 13 of the main body 10 of the impression coping may be formed as d1>d2, d1>d3, or d1<d2>d3. In this case, the inner surface between the first reference point ref1 and the second reference point ref2 may have the same inner diameter.

In the embodiment of the present invention, the relationship between the inner diameter 'd1' at the upper end 12 of the main body 10 of the impression coping and the inner diameter 'd2' at the reference point ref1 is expressed by [Equation 1] or [Equation 2] below. ] can be defined.

[Equation 1]

d1 > d2

[Equation 2]

2×d2 > d1 > d2

The fastening member 2 for fastening and fixing the main body 10 of the impression coping to the fixture 1 uses a screw. In general, the fastening member 2 uses a screw having a diameter of about 2.3 mm to 2.4 mm so that the body 2b has a diameter of about 2.0 mm and the head 2a has a larger diameter than the body 2b.

Accordingly, the inner diameter of the main body 10 of the impression coping, in which the head 2a of the fastening member 2 is accommodated, should be at least 2.4 mm, but is usually formed to be 2.5 mm with a margin of about 0.1 mm. As a result, the inner diameter d1 at the upper end 12 of the main body 10 of the impression coping becomes 2.5 mm.

On the other hand, the main body 10 of the impression coping should be smaller than the diameter of a general tooth. The reason is that if the width of the impression coping is larger when one tooth is lost, a problem in that the impression coping cannot be fastened and fixed to the fixture 1 occurs in the oral cavity.

Although the width of the posterior teeth is usually about 10 mm, the premolars are about 6 mm and the lower anterior teeth are about 4 mm. It may be virtually impossible to obtain a raise because it is difficult to conclude.

If the inside diameter 'd1' is 2.5mm, twice the 'd1' is 5.0mm. When the inner diameter of the main body 10 of the impression coping is 5.0 mm, the outer diameter must be at least 5.5 mm or more. The reason is that a curved surface is formed on the outer surface of the impression coping to increase the bonding force with the impression body. At this time, due to the convex portion of the curved surface, the impression coping can be formed to have a diameter larger than at least 6 mm, and therefore, in order to use the 6.0 mm size impression coping, at least 1 mm of impression material must be inserted on both sides of the oral cavity. Free space is required. In this case, since it can be used only where there is a space of 8 mm or more, it is difficult to use it for the lower anterior teeth, premolars, and upper premolars. Therefore, the inner diameter 'd2' at the first reference point ref1 should be less than twice that of 'd1'.

Meanwhile, as shown in FIG. 1 , a curved surface may be formed on the outer surface 15 of the main body 10 of the impression coping to increase bonding strength with the impression material used for impression taking. At this time, the curved surface may have a structure in which a certain pattern, for example, a convex surface and a concave surface are repeatedly or continuously formed. The curved surface may be formed in a longitudinal direction (vertical direction) of the impression coping, or may be formed in a wavy or concave shape in a rotational direction (lateral direction) along the circumferential surface. In addition, the curved surfaces may be continuously connected or separated from each other, and the shape of the pattern may be formed in various shapes without any limitation.

In addition, grooves (not shown) may be formed in the rotational direction on the outer surface 15 of the main body 10 of the impression coping, and in order to reproduce a groundbreaking work model after taking an impression, the impression body and the main body 10 of the impression coping A structure for preventing rotation, for example, a protrusion, a groove, or a cut flat surface, may be formed in the longitudinal direction on the outer surface of the main body 10 of the impression coping so that the impression body does not rotate when recombination. There are no limits.

2 is schematic diagrams for comparing impression copings according to an embodiment of the present invention and comparative examples, FIG. 2 (a) shows an impression coping according to an embodiment of the present invention and an impression body thereof, Figure 2 (b) shows the impression coping and its impression body according to Comparative Example 1, and Figure 2 (c) shows the impression coping and its impression body according to Comparative Example 2.

Comparative Example 1 has a structure in which the head 2a of the fastening member 2 is positioned at the inner lower part of the main body 30 of the impression coping, and the impression body 40 is rejoined to the main body 30 of the impression coping after impression taking. When the impression body 40 is formed, the impression body 40 may be deformed due to the crushing of the protrusion dh1' (a structure in which the driver hole dh1 formed in the head 2a of the fastening member 2 is copied). .

The reason for this is that when the impression body 40 is rejoined to the main body 30 of the impression coping after impression taking, the projection dh1' of the impression body 40 and the driver hole dh1' of the fastening member 2 are exactly matched. because it doesn't The inner surface of the driver hole dh1' is made of a prismatic shape (for example, a hexagonal groove), and the protruding part dh1 ′ copied therefrom has a prismatic outer surface. When inserted into the inside of the dh1'), distortion occurs, and the distortion of the projection dh1' is transferred to the entire impression body 40 and causes deformation.

The deformation of the impression body 40 is such that when the impression body 40 is coupled to the body 30 of the impression coping, as the inner surface of the body 30 is formed with the same inner diameter D1 vertically, the impression body 40 It is difficult to find the hollow (central hole) of the body 30 of the impression coping, and even if it is found, it is not inserted to a depth corresponding to the vertical length (desired depth) due to the body 30 of the impression coping, which has vertically vertical inner surfaces. This is because cracking occurs in the process.

For this reason, as in Comparative Example 2, the structure of the body 50 of the impression coping in which the head 3a of the fastening member 3 is located at the upper end of the body 50 of the impression coping was mainly used. The main body 50 of the impression coping as in Comparative Example 2 is for a closed tray, and the upper surface of the head 3a of the fastening member 3 fixing the main body 50 to the fixture 1 is the main body 50. ) was manufactured to almost coincide with the upper surface of the However, in Comparative Example 2, when the impression body 60 is rejoined to the main body 50 of the impression coping, distortion occurs at the projection dh2' of the impression body 60 due to mismatch with the driver hole dh2. As a result, the impression body 60 is deformed.

Unlike the structures of Comparative Examples 1 and 2 described above, in the main body 10 of the impression coping according to the embodiment of the present invention shown in FIG. By being positioned, the problems pointed out in Comparative Example 2 are solved, and the problem pointed out in Comparative Example 1, that is, the deformation of the impression body, is prevented as the inner diameter of the inner surface becomes smaller from the top to the bottom, and the groundwork work model is created. Compared to the structures of Comparative Examples 1 and 2, it can be accurately implemented.

3 is a diagram schematically illustrating a modified example of impression coping according to an embodiment of the present invention.

Referring to FIG. 3, the main body 70 of the impression coping according to the modified example according to the present invention is not formed with a stepped portion 14 on the inside as in the embodiment shown in FIG. 1, but with an inclined surface 71. . Correspondingly, the outer surface of the head 4a of the fastening member 4 may be formed as a downwardly inclined surface from top to bottom. For example, the head 4a of the fastening member 4 may be formed in a shape in which the upper portion of the conical structure is cut in a direction orthogonal to each other.

On the other hand, in the present invention, the inner surface of the impression coping is composed of an inclined surface to realize a structure in which the inner diameter decreases from the top to the bottom, but this is an example, and may include all structures and shapes in which the inner diameter decreases from the top to the bottom. there is. For example, the impression coping may be formed in a stepped structure in which gentle slopes are formed in multiple stages.

As described above, the technical spirit of the present invention has been specifically described in the preferred embodiment, but the above preferred embodiment is for explanation and not for limitation. As such, those skilled in the art will understand that various embodiments are possible through the combination of the embodiments of the present invention within the scope of the technical spirit of the present invention.

1: fixture 2, 3, 4: fastening member (screw)
2a, 3a, 4a: head 2b: body
10, 30, 50: body (impression coping) 10a: hollow
11: lower part 12: upper part
13, 71: inner surface 14: stepped part
15: outer surface 20, 40, 60, 70: impression body

Claims (7)

A main body having an inner surface in which an inner diameter decreases in a depth direction from an upper end of the hollow vertically penetrated; and
a fastening member having an upper surface of the head positioned on an inner lower portion of the main body and fixing the main body to the fixture;
Impression coping for implant procedure, characterized in that it comprises a.
According to claim 1,
Impression coping for implantation, characterized in that the inner surface of the main body has a structure in which the inner diameter decreases from the upper end of the hollow to the upper surface of the head.
According to claim 1,
In the lower part of the hollow, a stepped portion to which the lower end of the head is hooked is formed, and the inner surface of the main body has a structure in which the inner diameter decreases from the upper end of the hollow to the upper surface of the stepped portion. Impression coping.
According to claim 1,
Impression coping for implant procedure, characterized in that the outer surface of the head is made of an inclined surface.
According to claim 2,
Impression coping for implant procedure, characterized in that the upper inner diameter of the hollow has a size less than twice the inner diameter of the hollow at the same height as the upper surface of the head.
According to claim 3,
Impression coping for implant treatment, characterized in that the upper inner diameter of the hollow has a size less than twice the inner diameter of the hollow at the same height as the upper surface of the stepped part.
According to claim 1,
Impression coping for implant procedure, characterized in that the curved surface is formed on the outer surface of the main body.

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