KR20230102456A - Impression coping with extension retainer - Google Patents

Abstract

The present invention relates to an impression coping for an implant procedure used to reproduce the position of a fixture of an implant placed in the oral cavity in an extraoral stomatological work model, and more particularly, to a common coping body using extension holders manufactured in various lengths. It relates to an impression coping equipped with an extension retainer capable of stably taking impressions by combining with each to increase the length of the impression coping within the range allowed by the occlusal dimension.
According to the impression coping according to the present invention, a common coping body for common use is manufactured, and extension retainers having different lengths are combined thereto to compensate for the occlusal height, and the impression coping is manufactured to enable stable impression taking. In addition, it is possible to reduce the economic burden by reducing the number of coping bodies of the impression coping compared to the prior art while implementing the impression coping corresponding to the size of the occlusal dimension.

Description

Impression coping with extension retainer {IMPRESSION COPING WITH EXTENSION RETAINER}

The present invention relates to an impression coping for an implant procedure used to reproduce the position of a fixture of an implant placed in the oral cavity in an extraoral stomatological work model, and more particularly, to a common coping body using extension holders manufactured in various lengths. It relates to an impression coping equipped with an extension retainer capable of stably taking impressions by combining with each to increase the length of the impression coping within the range allowed by the occlusal dimension.

Impression coping performs a function of moving the fixture position of an implant placed in the oral cavity so that it can be reproduced as it is on a working model outside the oral cavity. Modeling work using this impression coping is very important in determining the accuracy of a porous object. For example, a prosthesis (prosthesis) manufactured with incorrect information cannot be used as a normal prosthesis because it does not look like the shape outside the oral cavity and is distorted or displaced when tried in the oral cavity.

The impression taking method using impression coping is usually performed at the fixture level. 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 model is made by pouring a dental stone, an abutment is fastened to the lab analog from which the impression coping is removed, and a prosthesis fit for the abutment is manufactured in consideration of the relationship between adjacent teeth and antagonistic teeth.

These impression copings are produced and used in various types according to the shape and aspect of the placed fixture. Fixtures can be largely classified into external types and internal types. The external type is a structure in which a hexa is formed on the outside, and the hexa structure that prevents rotation of the abutment is located on the outside of the fixture. The internal type is a structure in which a hexagram is formed inside, and the connection part between the fixture and the abutment is located inside, and is divided into a submerged type and a non-submerged type.

As various types of fixtures are used, it is necessary to prepare an impression coping suitable for each type of fixture. For example, to use for an external type fixture, an external type impression coping is required, and Straumann's BLX is a summerged type, but the inside of the fixture where the fixture and abutment are connected is hexagonal. Since it is made of a star shape (torx) rather than a torx, an impression coping suitable for this is required.

In addition, in the closed tray method used for taking impressions in the oral cavity, impression copings having various heights (upper and lower lengths) are required according to the thickness of the gums and/or the size of the occlusal dimension. Long impression copings are used if possible within the range allowed by the occlusal height. The longer the impression coping, the more the impression material comes into contact with the coping and achieves a sense of stability. That is, it is necessary to prepare impression copings having various heights suitable for the thickness of the gum and/or the size of the occlusal dimension. Here, the occlusal height indicates the numerical position of the lower jaw with respect to the upper jaw when the teeth of the upper and lower jaw are engaged at the maximum closed position.

In addition, in the case of companies that produce and sell implants, as each company combines a fixture and an abutment with a unique structure, an impression coping suitable for each company was also required.

As described above, conventionally, impression copings each having a differentiated structure must be provided for each type of fixture, thickness of gum, size of occlusal dimension, and/or implant vendor. For this reason, the dental implant procedure is cumbersome and complicated because various types of impression copings must be provided. In particular, since it is necessary to purchase various types of impression coping, it is also a burden economically.

KR 10-2224795 B1, 2021. 03. 02. KR 10-2021-0106724 A, 2021. 08. 31. KR 10-0597392 B1, 2006. 06. 29.

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 provide an extension retainer that can reduce the economic burden by reducing the number of impression copings manufactured and used in accordance with the types of fixtures and abutments having various structures and/or the occlusal height of the patient. It is to provide one impression coping.

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 common coping body; a coping screw that is inserted into the coping body through through-holes opened vertically in the center of the common coping body and couples and fixes the coping body to a fixture placed in the oral cavity; and an extension retainer detachably coupled to an upper portion of the through hole of the common coping body to extend a height corresponding to the patient's occlusal dimension from the upper surface of the common coping body. provides

In addition, the common coping body includes a coupling part coupled and fixed to the fixture through the coping screw; a connection portion integrally formed on an upper portion of the coupling portion and having a height corresponding to the thickness of the patient's gum; And integrally formed on the upper portion of the connecting portion, it may include a pillar portion protruding from the upper surface of the patient's gum.

In addition, the extension holder body is formed with one or a plurality of holding grooves in the height direction on the outer surface; and a screw coupling portion formed at a lower portion of the holder body and screwed to the pillar portion.

In addition, a through hole may be formed in the center of the holder body.

In addition, a stopper coupled to the upper part of the holder body through the through hole of the holder body to seal the upper part of the holder body may be further included.

In addition, the holder body may be formed in a rod shape.

In addition, the holder body may be formed in a structure in which a lower part and an upper part have the same diameter, or the diameter decreases from the lower part to the upper part.

In addition, protrusions may be formed on an outer surface of the holder body between the retaining grooves, and the protrusions may be formed in a structure in which the width and diameter of the protrusions become smaller toward the top.

In addition, the inner diameter of the through hole of the holder body may be formed in a structure that is constant or increases from the bottom to the top.

In addition, the inner surface of the common coping body may be formed in a structure in which the width increases from the bottom to the top.

In addition, in a state in which the extension holder is coupled and fixed to the common coping body, the distance between the head of the coping screw and the lower end of the screw coupling part of the extension holder is such that a screw groove screwed into the fixture is formed in the screw body of the coping screw. It can be formed longer than the length of the part.

Also, the head of the coping screw may have an upper diameter larger than a lower diameter.

As described above, according to the impression coping according to the present invention, a common coping body for common use is manufactured, and extension retainers having different lengths are combined thereto to compensate for the occlusal height, thereby manufacturing an impression coping. While enabling stable impression taking and implementing impression coping corresponding to the size of the occlusal dimension, it is possible to reduce the economic burden by reducing the number of coping bodies of the impression coping compared to the prior art.

That is, according to the impression coping according to the present invention, the height of the common coping body, which is affected by the type of fixture and the thickness of the gum, is limited to a uniform height, thereby significantly reducing the number of common coping bodies compared to the prior art. The total number of impression copings compared to the prior art can be significantly reduced by compensating for the lack of height due to the occlusal height due to the limited height of the coping body with an extension holder coupled to the common coping body.

1 is a schematic cross-sectional view of an impression coping according to an embodiment of the present invention.
Figure 2 is a cross-sectional view schematically showing a state in which the extension holder shown in Figure 1 is separated;
Figure 3 is a cross-sectional view schematically showing the common coping body shown in Figure 1;
4 is a cross-sectional view schematically illustrating the extension holder shown in FIG. 1;
5 is cross-sectional views schematically illustrating extension holders having different heights according to the present invention.
Figure 6 is cross-sectional views schematically showing another example of the extension holder according to the present invention.
Figure 7 is cross-sectional views briefly shown to explain the stopper according to the present invention.
8 are cross-sectional views schematically showing the inner structure of the extension holder according to the present invention.
9 is a cross-sectional view schematically illustrating an extension holder according to another example of the present invention.
Figure 10 is cross-sectional views schematically showing the inner structure of the common coping body according to the present invention.
11 is cross-sectional views briefly shown to explain another example of a coping screw according to the present invention.

Hereinafter, the advantages and characteristics of the present invention, and methods for achieving them will become clear with reference to the embodiments to be described 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 a variety of different forms, and is provided to fully inform those skilled in the art of the scope of the invention to which the present invention belongs. and the present 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 general, in order to move the position of the fixture in the oral cavity to the outside of the oral cavity using the coping body of the impression coping, different heights are required according to the occlusal height. For example, assuming that impression coping is required with a height (length) difference of 2 mm, approximately 5 types of impression coping, such as 5 mm, 7 mm, 9 mm, 11 mm, and 13 mm, should be prepared based on the upper surface of the fixture. In this case, a few of each size, or each according to an external type, an internal type, an ITI type, or a specific type of a specific company should be provided. Also, if the shape of the part connecting the fixture and abutment is different, the impression coping should be prepared accordingly. In addition, when using a closed tray, the length (upper and lower length) of the impression coping is more stable as long as possible within the range allowed by the occlusal dimension.

Therefore, in the present invention, a common coping body for common use is manufactured, and an impression coping is manufactured by combining extension retainers having different lengths to compensate for the occlusal height. That is, stable impression taking was made possible by increasing the overall length of the impression coping by combining the extension holder with the common coping body of the impression coping. Accordingly, it is possible to reduce the economic burden by reducing the number of coping bodies of the impression coping compared to the prior art while implementing the impression coping corresponding to the size of the occlusal dimension.

For example, the present invention uses only one type of common coping body and approximately 4 to 5 types of tool holders in the task of copying the position of a corresponding fixture placed in the oral cavity so that the position information of the corresponding fixture can be accurately copied. want to provide In other words, when the internal and external structures of the fixture are different and the corresponding impression coping is required, one type of common coping body is designed and prepared to fit the fixture, and the required length corresponding to the occlusal diameter is manufactured according to the occlusal diameter. Compensation can be made by coupling the extension holder to the common coping body.

1 is a cross-sectional view schematically showing an impression coping according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view schematically showing a state in which the extension holder shown in FIG. 1 is separated.

1 and 2, the impression coping 10 according to the embodiment of the present invention is detachably coupled to the common coping body 11 and the upper part of the common coping body 11, and corresponds to the occlusal dimension of the patient. It includes an extension holder 12 for increasing the height (top and bottom length) of the impression coping 10 and a coping screw 13 for fixing the common coping body 11 to the implanted fixture 1.

The common coping body 11 may be formed to have various structures and heights corresponding to the type of fixture 1 placed in the oral cavity (the internal or external structure is different for each type) and the thickness of the gum 2 in the oral cavity. In addition, a through hole 11a may be formed in the center of the common coping body 11 so that the coping screw 13 may pass through the center and be coupled and fixed to the fixture 1.

The common coping body 11 includes a coupling portion 111, a connecting portion 112, and a pillar portion 113. At this time, the coupling part 111, the connection part 112, and the pillar part 113 artificially divide the common coping body 11 by position for convenience of description, and they integrally form one structure.

Coupling part 111 is a part coupled to the inside of the fixture 1 when fixed to the fixture 1, as shown in FIG. Connection portion 112 is a portion for reflecting the thickness (t) of the gum (2). In addition, the pillar portion 113 is formed extending upward from the connection portion 112 so as to protrude upward from the gum 2 and is coupled to the impression body, and is connected to the coupling portion 111 through the connection portion 112.

The coupling part 111 is inserted into the fixture 1 by the coping screw 13 and is directly coupled to the fixture 1, and its shape may vary depending on the internal and external shapes of the fixture 1. This coupling part 111 is affected by the type of fixture 1. Accordingly, the coupling part 111 should be formed in a structure corresponding to the internal and external structures and depths according to the type of the fixture 1.

As shown in FIG. 1, the connecting portion 112 is a portion extending upward from the upper surface of the coupling portion 111, and is affected by the thickness t of the gum 2. Accordingly, the connecting portion 112 is formed to have a height (B_h0) corresponding to the thickness (t) of the gum (2) to correspond to the thickness (t) of the gum (2).

Therefore, in the embodiment of the present invention, the coupling part 111 and the connecting part 112 are formed to have a structure (coupled structure) and height suitable for the type of fixture 1 and the thickness t of the gum 2. After all, it is necessary as much as the number corresponding to the type of fixture (1) and the thickness (t) of the gum (2).

The pillar part 113 is a part that protrudes upward from the gum 2, and its height is determined according to the occlusal height. The pillar part 113 according to the present invention corresponds to the type of fixture 1 and the thickness t of the gum 2, even if the structure and height of the coupling part 111 and the height of the connection part 112 are changed. It is formed at the same height based on the upper surface of (2).

That is, in the embodiment of the present invention, the coupling part 111 and the connecting part 112 of the common coping body 11 are affected by the type of the fixture 1 or the thickness t of the gum 2, respectively. Accordingly, the structure and height are inevitably changed in correspondence with the type of fixture 1 or the thickness t of the gum 2. On the other hand, since the pillar portion 113 is not affected by the type of fixture 1 or the thickness t of the gum 2, it is possible to form a uniform height (B_h1) based on the upper surface of the gum 2. do.

Therefore, in the present invention, when designing the impression coping 10, the common coping body 11 is designed in correspondence with the type of the fixture 1 or the thickness t of the gum 2, and then the size of the occlusal dimension Only parts are considered. That is, the insufficient height of the common coping body 11 can be compensated for through the extension holder 12 detachably coupled from the common coping body 11 .

Figure 3 is a cross-sectional view schematically showing the common coping body shown in Figure 1;

As shown in FIGS. 1 and 3 , a curved surface may be formed on the outer surface 11c of the common coping body 11 to increase bonding force with the impression material used for impression taking and to reproduce the direction. This is to reproduce the direction as it is when the impression coping 10 is inserted into the impression body.

As shown in FIG. 3, the outer surface 11c of the common coping body 11 includes at least one of a curved surface (a) and a vertical surface (b). The curved surface (a) may be a specific pattern formed regularly or irregularly continuously or discontinuously in the vertical direction or circumferential direction of the coping body 11 . At this time, the specific pattern may be formed in a wavy or concave shape having a concave portion and a convex portion. The vertical plane (b) prevents the impression body from rotating or moving when the impression body and the common coping body 11 are recombined to reproduce the groundbreaking work model after impression taking, and is an inclined surface with an upwardly inclined structure or a downwardly inclined structure. may be formed.

FIG. 4 is a schematic cross-sectional view of the extension holder shown in FIG. 1 .

1 and 4, the extension holder 12 is inserted into and coupled to the top of the through hole 11a formed in the common coping body 11 to increase the height (upper and lower length) of the common coping body 11.

The extension holder 12 is formed in a holder body 121 in which a through hole 12a through which the center passes vertically is formed and a holding groove 121a is formed, and a lower portion of the holder body 121, It includes a screw coupling part 122 screwed to the top of the through hole 11a of the common coping body 11.

By increasing the height of the holder body 121 by 'S-h1' from the upper surface 11b of the coping body 11, the height of the common coping body 11 can be adjusted in response to the size of the occlusal height. At this time, the height of the retainer main body 121 is formed to a size corresponding to the size of the occlusal dimension.

The extension retainer 12 is detachably coupled to the common coping body 11 via a screw coupling part 122 . To this end, screw grooves 122a and 11e are formed on the outer circumferential surface of the screw coupling part 122 and the inner circumferential surface of the through hole 11a of the common coping body 11.

5 is cross-sectional views schematically illustrating extension holders having different heights according to the present invention.

Referring to FIG. 5 , in the extension retainers 12, 22, 32, and 42, the heights of the retainer main bodies 121, 221, 321, and 421 increase from (a) to (d) in response to an increase in the size of the occlusal dimension. increasingly increases

The holder bodies 121, 221, 321, and 421 may be uniform to each other or may be increased to different heights. In the case of increasing by 1 time in the former case, for example, the height (S_h2) of the holder body 221 shown in FIG. 5 (b) is the height of the holder body 121 shown in FIG. Twice the height (S_h1), the height (S_h3) of the holder body 321 shown in FIG. 5 (c) is three times, the height of the holder body 421 shown in FIG. 5 (d) ( S_h4) may be quadrupled and formed with a uniform height.

Figure 6 is cross-sectional views schematically showing another example of an extension holder according to the present invention, (a) shows a structure having the same diameter (width), and (b) shows a structure in which the diameter decreases toward the top.

As shown in Fig. 6 (a), the holder body 421 of the extension holder 42 is formed with the same diameter. On the other hand, as shown in (b) of FIG. 6 , in the extension holder 52 according to another example of the present invention, the holder body 521 has a structure in which the width decreases as the holder body 521 goes in the height direction.

As shown in Fig. 6, when viewed from above, the extension holders 42 and 52 have a circular structure. The reason is to memorize and reproduce the shape in the height direction through the extension holders 42 and 52. This is because when the extension holders 42 and 52 are formed in an angular shape, the extension holders 42 and 52 act as elements that hinder reproduction of the direction. Therefore, the holder bodies 421 and 521 of the extension holders 42 and 52 are formed in a circular rod or tube structure.

As shown in (a) of FIG. 6, in the extension holder 42, the diameter of the holder main body 421 is formed the same. Accordingly, each of the holding grooves 421a is formed to have the same diameter in the height direction, and the protrusion 421b is also formed to have the same diameter. However, in this structure, it is not easy to separate the impression body from the extension holder 42 later or to reassemble the impression body in a lab analog work process. For this reason, as shown in FIG. 6(b), it is preferable to form the diameter of the holder body 521 to become narrower in the height direction.

That is, in the present invention, as shown in (b) of FIG. 6, when forming the holder body 521 of the extension holder 52, it is formed in a structure in which the diameter decreases in the height direction. Accordingly, the holding grooves 521a and the protrusions 521b formed on the outer surface of the holder body 521 have smaller diameters in the height direction so as to remove the impression body from the holder body 521 of the extension holder 52 later. It is easy to separate or reassemble the impression body in the lab analog work process.

The retaining groove 521a and the protrusion 521b formed on the holder body 521 of the extension retainer 52 increase the binding force with the impression body so that the holder body 521 does not flow inside the impression body and stably let it be maintained At this time, the holding groove 521a may be formed of a curved surface that is caught in the height direction of the holder body 521 and may be formed of a continuously connected corrugated structure.

In addition, when the holder body 521 has a structure in which the diameter decreases toward the top, all the retaining grooves 521a are vertically centered on the holder body 521 (one height of the upper and lower heights of the holder body 521). /2 point), the radius of the holding groove formed at the top is smaller than the holding groove formed at the bottom, and the radius of the protrusion 521b is smaller with respect to the central axis of the holder body 521 toward the top. can be formed as When viewed from above, the retaining groove 521a and the protrusion 521b may have a circular structure around the central axis of the holder body 521 .

In this way, the retaining groove 521a is formed on the outer surface of the holder main body 521 of the extension holder 52 . Accordingly, the retaining groove serves to prevent rotation or movement of the impression body when it is coupled with the retainer body 521 . That is, if a large force is applied while the holding groove 521a and the impression body are coupled, the impression body should be separated from the holding groove 521a by the elasticity of the impression body, but the force smaller than the force by which the impression body is separated from the holding groove 521a When force is applied to the impression body, the impression body does not rotate or move about the holding groove 521a as an axis.

And, in the present invention, as shown in FIG. 5, the height of the extended retainer is manufactured in various sizes according to the size of the occlusal dimension. The reason is that it has to play a role of registering the bite according to the distance from the opposing tooth. If the distance to the antagonist is within 2 mm, the relationship with the antagonist is accurately recorded on the impression body. Since the length is varied, when there are adjacent teeth on both sides of the fixture, the impression itself can register the relationship with the antagonist teeth, so it has the advantage of not requiring an additional occlusion test. In addition, as the length, that is, the height of the impression coping increases, the contact area with the impression material increases, so the sense of stability increases.

As shown in FIG. 1, the coping screw 13 is inserted through the through hole 11a formed in the common coping body 11 and then screwed to the fixture 1 to fix the common coping body 11 to the fixture 1. A head 132 that is formed on the upper part of the screw body 131 and the screw body 131 and is caught on the stepped portion 11f formed between the connecting portion 112 and the coupling portion 111 of the common coping body 11 includes

A hexagonal or torx-shaped driver hole may be formed in the head 132 to screw the coping screw 13 into the common coping body 11 using a screwdriver. In addition, the head 132 may have a hexagonal shape.

7 is cross-sectional views briefly shown to explain a coupling method of a stopper for sealing an upper portion of an extension holder according to the present invention.

As shown in FIG. 7 , since the through hole 42a is formed in the center of the extension holder 42, the opened upper part must be sealed so that the impression material does not flow into the inside during impression taking. For this purpose, the stoppers 14 and 15 are coupled and fixed. At this time, the stoppers 14 and 15 may be inserted and coupled to seal the upper portion of the through hole 42a by an interference fitting method (see a) or a screw coupling method (see b).

8 is cross-sectional views briefly shown to explain the inner structure of the extension holder according to the present invention.

As shown in (a) of FIG. 8, in the extension holders 42 and 42' according to the present invention, the inner surfaces of the through holes 42a and 42a' are formed to have the same diameter (d1 = d2) vertically or As in (b), it may be formed with different diameters (d3<d4). For example, as shown in (b) of FIG. 8, the through hole 42a' of the extension holder 42' may have a structure in which the diameter increases from the bottom to the top. When the diameter of the through hole 42a' widens from the bottom to the top, the through hole 42a' at the top of the extension holder 42' is filled with a temporary filler before impression taking, and then the temporary filler is removed after impression taking. It has the advantage of being easy to do. The hardened temporary filler, which has a narrower diameter toward the lower portion of the through hole 42a', becomes difficult to enter the lower portion even with pressing force and can be easily removed through the through hole entrance.

9 is a cross-sectional view schematically illustrating an extension holder according to another example of the present invention.

As shown in FIG. 9 , the extension holder 62 according to another example of the present invention has a rod structure without a through hole. As shown in FIG. 7, in the extension holder 42 having a through hole formed in the center, a separate stopper must be provided, but in the case of a rod structure without a through hole, the structure can be simplified because the upper part is sealed and there is no need to install a separate stopper. there is.

As shown in FIG. 9 , in order to loosen or tighten the coping screw 13, the extension holder 62 without a through-hole must be separated from the common coping body 11, so the work can be complicated. . However, in the extension holder 42 as shown in FIG. 7 , a coping screw ( 13) can be loosened or tightened.

10 is cross-sectional views briefly shown to explain the inner structure of the common coping body according to the present invention.

As shown in (a) of FIG. 10, in the common coping body 11, 11' according to the present invention, the inner surface 11d of the through holes 11a, 11a' is formed with the same diameter (D1 = D2), or, as another example, As shown in (b) of FIG. 10, it may be formed with different diameters (D3<D4). For example, as shown in (b) of FIG. 10, when formed with different diameters, a structure in which the diameter increases toward the top may be made.

On the other hand, as in the present invention, the purpose of using the penetrating extension holder 12 (extension holder having a through hole formed in the center) is a state in which the extension holder 12 is combined with the common coping body 11 after taking an impression. This is to remove the common coping body 11 from the fixture 1 and connect it directly to the lab analog. Matters to be considered in this structure are shown in FIG. 11 .

11 is cross-sectional views briefly shown to explain another example of a coping screw according to the present invention, and FIG. 11 (a) and FIG. 11 (b) are views showing coping screws having different structures.

As shown in FIG. 11, the lower inner diameter q of the screw coupling part 122 coupling the extension holder 12 having the through hole 12a formed in the center to the common coping bodies 11 and 11' is the coping screw 13 , 13'), when the diameter r of the heads 132 and 132' is smaller, the coping screws 13 and 13' should be designed considering the following considerations. That is, as described above, as the height of the common coping bodies 11 and 11' is formed to a limited height in order to reduce the number of coping bodies, the extension holder 12 is coupled and fixed to the common coping bodies 11 and 11' In order to release and separate the coping screws 13 and 13' in this state, the coping screws 13 and 13' should be designed in consideration of the following.

When the extension holder 12 is separated from the fixture 1 by unscrewing the coping screws 13 and 13' in a state in which the extension holder 12 is coupled and fixed without being separated from the common coping bodies 11 and 11', the coping screws 13 and 13 The distance (x) between the heads 132 and 132' of the coping screws 13 and 13' and the lower end of the screw coupling part 122 of the extension holder 12 so that ') can be completely loosened and separated from the fixture 1. ) must be sufficiently secured. Otherwise, in the process of separating the coping screws 13 and 13' from the fixture 1, the heads 132 and 132' of the coping screws 13 and 13' are screwed into the screw coupling part 122 of the extension holder 12. ) may be caught at the lower end and no longer be released.

Therefore, in order to stably separate the coping screws 13 and 13' from the fixture 1 in a coupled and fixed state without separating the extension holder 12 from the common coping bodies 11 and 11', the screw body 131 , 131 '), the length (y) of the portion where the screw groove is formed that is substantially screwed into the screw groove formed in the fixture 1 is connected to the heads 132 and 132' of the coping screws 13 and 13' and the extension holder It should be formed smaller than the distance (x) between the lower ends of the screw coupling part 122 of (12). That is, the distance (x) between the heads 132 and 132' of the coping screws 13 and 13' and the lower end of the screw coupling portion 122 of the extension holder 12 is substantially reduced in the screw body 131 and 131'. It should be formed longer than the length (y) of the portion where the screw groove is screwed into the screw groove formed in the fixture (1).

The distance (x) between the heads 132 and 132' of the coping screws 13 and 13' and the lower end of the screw coupling part 122 of the extension holder 12 is measured from the screw body 131 and 131' to the fixture 1 ) As a method for forming longer than the length (y) of the portion where the screw groove is formed, for example, a method of lowering the height of the heads 132 and 132' of the coping screws 13 and 13' can be used. can This method can be implemented by lowering the height of the hooking jaw portion where the heads 132 and 132' of the coping screws 13 and 13' are caught inside the common coping bodies 11 and 11'. As an example, as shown in (b) of FIG. 11, the upper diameter of the head 132' of the coping screw 13' is formed larger than the lower diameter to lower the locking jaw portion to act as a locking jaw on the side of the head. There is a way.

On the other hand, as shown in (b) of FIG. 11, the neck of the coping screw 13', that is, the screw body, in order to compensate for the coupling force due to the decrease in the distance between the screwed portion between the coping screw 13' and the fixture 1. Screw threads may be further formed on the top of 131' so as to be screwed with approximately 2 to 4 threads formed inside the common coping body 11'. Through this, it is possible to compensate for the coupling force due to the reduction in the distance between the screwed portion between the coping screw 13' and the fixture 1.

Hereinafter, operational effects when applying impression coping according to an embodiment of the present invention will be described.

For example, in order to take an impression of the 'A' type fixture, one type of common coping body that can be coupled to the 'A' type fixture, and 4 to 5 types of extensions with different heights (lengths) as shown in FIG. maintenance is required In addition, when taking an impression of the 'B' type fixture, one type of common coping body that can be coupled to the 'B' type fixture is additionally prepared, and the extension holder is used for impression taking of the 'A' type fixture. You can use the tools and tools you use when using them as they are. Even when taking an impression of the 'C' type fixture, one type of common coping body can be additionally prepared, and the tool holder used in the 'A' type can be used as it is.

In this way, when the impression coping according to the embodiment of the present invention is applied, when impression taking is performed using only the 'A' type fixture, only a few types of extension holders having different lengths from the coping body suitable for the 'A' type are used. You just need to prepare. In addition, when impression taking is performed by additionally using 'B' type, 'C' type, and 'D' type fixtures, a structure that can be combined with 'B' type, 'C' type, and 'D' type fixtures Only the coping body having the need to be additionally prepared.

On the other hand, in the impression coping structure according to the prior art, that is, the impression coping structure having a coping body designed to have a height corresponding to the size of the occlusal dimension, for example, 10 different heights corresponding to the size of the occlusal dimension ( Assuming that a coping body having a length) is required, coping screws capable of fixing 10 coping bodies having different lengths must be prepared. That is, in the case of the 'A' type fixture, 50 coping bodies are required, and in this case, 50 coping screws are required. In addition, in the case of 'B' type, 'C' type, and 'D' type fixtures, 50 coping bodies must be additionally prepared.

However, in the case of design like the impression coping according to the embodiment of the present invention, the size of the occlusal dimension is not reflected and the coping body is designed to have a uniform height, so in the case of the 'A' type fixture, 10 coping bodies and tool holders 50 pieces are required, and in the case of 'B' type, 'C' type, and 'D' type fixtures, extension holders are used in common, so only 10 coping bodies need to be additionally prepared, compared to the prior art. An advantage of reducing the number of main bodies may be provided.

Therefore, in the present invention, the common coping body 11 plays a role of memorizing and reproducing the left-right direction, and the extension holder 12 plays a role of memorizing and reproducing the height direction. In addition, even if impressions of various types of fixtures are obtained by designing the extension holder 12 as shown in FIG. 5, what needs to be additionally prepared is only one type of impression coping coping body suitable for the fixture type, so the dental position It is easy to manage and simple to operate.

As described above, the technical idea 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 combination of the embodiments of the present invention within the scope of the technical idea of the present invention.

1: fixture 2: gum
10: impression coping 11, 11': common coping body
11a, 11a': through hole 11b: upper surface
11c: outer surface 11e: screw groove
12a, 42a, 42a': through hole 13, 13': coping screw
14, 15: stopper 111: coupling part
112: connection part 113: pillar part
121a: holding groove 122: screw coupling part
122a: screw groove 131, 131 ': screw body
132, 132': head 421a, 521a: retaining groove
421b, 521b: stone
121, 221, 321, 421, 521: retainer body
12, 22, 32, 42, 42', 52, 62: tool holder

Claims (12)

common coping body;
a coping screw that is inserted into the coping body through through-holes opened vertically in the center of the common coping body and couples and fixes the coping body to a fixture placed in the oral cavity; and
an extension retainer detachably coupled to an upper portion of the through hole of the common coping body and extending a height from the upper surface of the common coping body corresponding to the size of the patient's occlusal dimension;
Impression coping with an extension holder comprising a.
According to claim 1,
The common coping body,
a coupling portion coupled and fixed to the fixture through the coping screw;
a connection portion integrally formed on an upper portion of the coupling portion and having a height corresponding to the thickness of the patient's gum; and
a pillar portion integrally formed on an upper portion of the connecting portion and protruding from an upper surface of the patient's gum;
Impression coping with an extension holder comprising a.
According to claim 2,
The extension retainer,
A holder body having one or a plurality of holding grooves formed on an outer surface thereof in a height direction; and
a screw coupling portion formed at a lower portion of the holder body and screwed to the pillar portion;
Impression coping with an extension holder comprising a.
According to claim 3,
The holder body is an impression coping having an extension holder having a through hole formed in the center.
According to claim 3,
The impression coping having an extension holder further comprising a stopper coupled to the upper part of the holder body through the through hole of the holder body to seal the upper part of the holder body.
According to claim 3,
The holder body is an impression coping having an extension holder formed in a rod shape.
According to claim 3,
The holder body has an impression coping having an extension holder formed in a structure in which a lower part and an upper part have the same diameter or have a smaller diameter from the lower part to the upper part.
According to claim 3,
An impression coping having an extension holder formed in a structure in which protrusions are formed between the holding grooves on an outer surface of the holder body, and the diameter of the protrusions decreases toward the top.
According to claim 3,
Impression coping having an extension holder formed in a structure in which the inner diameter of the through hole of the holder body is constant or increases from the bottom to the top.
According to claim 2,
An impression coping having an extension holder formed in a structure in which the inner surface of the common coping body increases in width from the bottom to the top.
According to claim 2,
In a state in which the extension retainer is coupled and fixed to the common coping body, the distance between the head of the coping screw and the lower end of the screw coupling part of the extension retainer is equal to the distance between the head of the coping screw and the lower end of the screw coupling part of the extension holder in the screw body of the coping screw where the screw groove screwed into the fixture is formed. Impression coping with an extended retainer formed longer than the length.
According to claim 2,
The head of the coping screw is an impression coping having an extension holder formed with an upper diameter larger than a lower diameter.

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