WO2025095455A1 - Fixing holder - Google Patents

Abstract

The present invention relates to a fixing holder for mounting an object to be machined to a cutting machine, the object being integrally connected to an abutment, the fixing holder including: a connection part connected to a jig of the cutting machine; and a coupling part provided on the other side of the connection part in the longitudinal direction and coupled to an end part of the abutment.

Description

Fixed holder

The present invention relates to a fixing holder, and more particularly, to a fixing holder used when mounting a machining target (aka mill blank) used for manufacturing a dental prosthesis to a jig of a cutting processing device.

A dental implant is an artificial tooth structure or dental procedure that is formed by planting an artificial tooth root in an area where a tooth has been partially or completely lost, attaching it to the alveolar bone, and fixing a dental prosthesis to the artificial tooth root.

In general, a dental implant is largely composed of a fixture that is implanted into the alveolar bone and acts as an artificial tooth root, an abutment that is joined to the fixture and rises above the patient's gums, and an artificial tooth that is connected to the abutment.

In other words, the fixture can be said to be a fixed body that is implanted into the alveolar bone of the missing tooth area, similar to the root of a natural tooth, to support an artificial tooth.

An abutment, also called a base, is configured to connect a fixture implanted in the alveolar bone to an artificial tooth, and the artificial tooth is fixed in the oral cavity by the abutment to reproduce the same shape and function as a natural tooth.

One of the common methods for producing artificial teeth is to produce a prosthesis of a predetermined shape by cutting and processing a prosthesis material (hereinafter referred to as a processing target) called a mill blank. In some cases, an abutment is also custom-made by cutting and processing this prosthesis material.

In this processing method, in order to mount the object to be processed on the jig of the cutting processing device, a medium that connects the object to be processed and the jig to each other is required, and this medium can be referred to as a fixing holder.

The above-mentioned fixed holder can be said to be a component that supports the workpiece (block) and firmly places it on the jig of the cutting processing device so that the cutting tool can precisely process the workpiece (block).

Conventional fixed holders are usually configured to be bonded to one side of a processing target by an adhesive method.

Specifically, one side of the fixed holder is bonded to one side of the workpiece by an adhesive method, and the other side is mounted on a jig of a cutting processing device. When the cutting processing of the workpiece is completed, the fixed holder cannot be separated and reused, and is discarded together with the unprocessed part of the workpiece, as shown in Fig. 5.

Therefore, existing fixed holders have the problem of increasing the manufacturing cost of dental implants.

Meanwhile, conventional methods for manufacturing dental prosthetics, such as implants, have the disadvantage of a long manufacturing time, as they require sequential processes of cutting and processing the object to be processed using a cutting processing device, separating the processed object (artificial teeth, etc.) from the cutting processing device, and combining it with an abutment.

In addition, since the process of combining the artificial tooth and the abutment must be performed manually, the accuracy of the combining position of the abutment and the artificial tooth is low, and if the abutment is combined misaligned from the set position, the work must be performed again, which increases the procedure time.

In order to solve the above problems, the applicant has developed a processing object to which an abutment is integrally connected, and a method for manufacturing an artificial tooth using the processing object, so that the post-processing of connecting an abutment to a processed artificial tooth can be omitted. The technical contents thereof are specifically disclosed in Korean Patent No. 10-2426218, to which the applicant is the patent holder.

However, in the case of a workpiece having an integrally bonded abutment, there is a limitation in terms of ease of mounting on a jig of a specific type of cutting processing device, and therefore, a method for increasing versatility is required.

Accordingly, the applicant of the present invention developed the present invention to solve the above problems, and a prior art document related thereto is 'Artificial teeth and manufacturing method thereof' of Republic of Korea Patent No. 10-2426218.

The present invention is intended to solve the above problems, and the purpose of the present invention is to provide a fixing holder that is connected to an end of an abutment integrally connected to a workpiece (block) so as to enable the workpiece (block) to be created on a jig of a cutting processing device, and which can be reused semi-permanently.

The present invention provides a fixing holder for mounting a machining object, in which an abutment is integrally connected, on a cutting processing device, the fixing holder including: a connecting portion connected to a jig of the cutting processing device; and a connecting portion provided on the other side in the longitudinal direction of the connecting portion and connected to an end of the abutment.

In addition, the connecting part may include a connecting pin that can be inserted into a joining hole formed in a jig of the cutting processing device; and an expanding member that is integrally connected to the connecting pin and has an outer diameter larger than the outer diameter of the connecting pin and is positioned facing the processing target.

In addition, a hollow receiving member is formed protrudingly at the center of one side of the expanding member, and the connecting portion that is connected to the end of the abutment can be formed in the receiving member in the form of a fixing groove.

Additionally, the joint portion may be formed in a portion of the length of the receiving member.

In addition, a fastening hole may be formed in the remaining longitudinal section of the receiving member and the expanding member to be screw-connected with a fastening member passing through the interior of the abutment.

Additionally, a first reference mark that can be visually confirmed by a worker may be displayed or formed on the periphery of the receiving member.

In addition, the first reference mark may correspond to a second reference mark displayed or formed on the outer surface of the processing target when the end of the abutment is inserted and secured in the connecting portion.

In addition, the connecting portion that is connected to the end of the abutment may be formed in the center of one side of the expanding member in the form of a fixing groove.

Additionally, the above-mentioned joint may be formed in a portion of the longitudinal direction of the expanding member.

In addition, a fastening hole may be formed in the remaining longitudinal section of the expansion member or in a portion of the longitudinal section of the connecting pin to be screw-connected with a fastening member passing through the interior of the abutment.

Additionally, a first reference mark that can be visually confirmed by a worker may be displayed or formed on the circumference of the above-mentioned expansion member.

In addition, the first reference mark may correspond to a second reference mark displayed or formed on the outer surface of the processing target when the end of the abutment is inserted and secured in the connecting portion.

In addition, the above-mentioned connecting portion may be formed by protruding from one surface of the expanding member or from an end of a receiving member that is formed by protruding from one surface of the expanding member in the form of a connecting projection.

The fixing holder according to the present invention can firmly mount a workpiece to which an abutment is integrally connected to a jig of a cutting processing device, and can increase compatibility so that a workpiece to which an abutment is integrally connected can be processed in various types of cutting processing devices.

In addition, the fixed holder according to the present invention provides convenience in cutting processing by allowing the worker to easily set the processing direction of the processing target.

In addition, since the fixing holder according to the present invention is manufactured using a material and manufacturing method that can withstand the load generated from the cutting tool and the rigidity according to the mechanical strength, it can be used semi-permanently over a number of times, thereby reducing the cost of manufacturing artificial teeth.

Figure 1 is a perspective view showing the configuration of a fixing holder according to one embodiment of the present invention.

FIG. 2 is a perspective view showing an end of an abutment integrally connected to a workpiece mounted on a fixing holder according to one embodiment of the present invention.

Figure 3 is a cross-sectional view of the fixing holder, workpiece, and abutment shown in Figure 2.

Figure 4 is an exploded perspective view showing the fixed holder, workpiece, and abutment illustrated in Figure 2 separated from each other.

Figure 5 is a drawing showing the appearance of a conventional fixed holder and a processing residue portion of a movable object being discarded in an adhesively bonded state.

FIG. 6 is a perspective view showing a state in which a fixing holder, a workpiece, and an abutment are separated from each other according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a state in which a fixing holder, a workpiece, and an abutment are separated from each other according to another embodiment of the present invention.

Figure 8 is a cross-sectional view showing a through hole formed in an oblique direction in a workpiece.

Figure 9 is an exploded perspective view showing a joint in the form of a fixing groove that is joined to the end of a non-submerged type abutment.

Fig. 10 is a cross-sectional view showing a state in which the fixed holder illustrated in Fig. 9 and a non-submerged type abutment are combined.

Figure 11 is an exploded perspective view showing a joint in the form of a connecting projection that is combined with an external type abutment.

Fig. 12 is a cross-sectional view showing the state in which the fixing holder illustrated in Fig. 11 and the external type abutment are combined.

The advantages and features of the present invention and the methods for achieving them will become apparent with reference to the embodiments described in detail below together with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and these embodiments are provided only to make the disclosure of the present invention complete and to fully inform a person having ordinary skill in the art to which the present invention belongs of the scope of the invention, and the present invention is defined only by the scope of the claims.

Hereinafter, a fixing holder according to one embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4. In describing the present invention, specific descriptions of related known functions or configurations are omitted in order to avoid obscuring the gist of the invention.

FIG. 1 is a perspective view showing the configuration of a fixing holder according to one embodiment of the present invention, FIG. 2 is a perspective view showing an end of an abutment integrally connected to a workpiece is mounted on a fixing holder according to one embodiment of the present invention, FIG. 3 is a cross-sectional view of the fixing holder, the workpiece, and the abutment shown in FIG. 2, and FIG. 4 is an exploded perspective view showing the fixing holder, the workpiece, and the abutment shown in FIG. 2 in a separated state.

First, as illustrated in FIGS. 1 to 4, a fixing holder (100) according to one embodiment of the present invention has a characteristic configuration in which a workpiece (10) to which an abutment (20) is integrally connected is mounted on a cutting processing device, and further, the workpiece (10) to which an abutment (20) is integrally connected can be processed in various cutting processing devices, and in this process, the worker can perform the work without checking the processing direction of the workpiece (10).

In addition, the fixing holder (100) according to one embodiment of the present invention can prevent the machining origin of the machining object (10) from being distorted within a set range even when mounted on various jigs.

Before the specific configuration of the fixing holder (100) according to one embodiment of the present invention is described, the configuration of the workpiece (10) having an integrally connected abutment (20) is briefly described with reference to FIGS. 2 to 4.

First, the above-mentioned processing target (10) can be composed of a known shape and material that can be easily selected and implemented by a person skilled in the art.

For example, the object to be processed may be composed of one or more of glass or glass-ceramic, polymer infiltrated glass, composite resin or hybrid material, unsintered or a partially sintered or a densely-sintered ceramic, metal or a metal alloy. In addition, the object to be processed (10) has characteristics such as high strength, thermal stability and high corrosion resistance, and may be used alone in white or colored form, or may be used in combination with white and colored form.

In addition, the processing target (10) may have various shapes such as a cube, a rectangular solid, a cylinder, a polygonal pillar, etc. The processing target (10) according to an embodiment of the present invention is illustrated in the drawing as having the shape of a cylinder with a through hole (11) formed in the center.

The above through hole (11) can be formed along the entire length of the processing target (10).

For reference, a fastening member (not shown) that is screw-connected to a fixture or a receiving member (120) of a fixing holder (100) to be described later can be inserted through a through hole (11) formed in a processing target (10).

For reference, the through hole (11) formed in the above-mentioned processing target (10) may be formed in a vertical direction as shown in FIG. 3, or as another example, may be formed in an oblique direction as shown in FIG. 8.

The end portion (21) formed on one side of the longitudinal direction of the abutment (20) can be said to be a portion that is detachably connected to the receiving member (120) of the fixing holder (100) to be described later. In addition, the portion formed on the other side of the longitudinal direction (direction of arrow X shown in FIG. 1) of the abutment (20) can have the shape of a truncated cone and can be said to be a portion that is connected to the object to be processed (10).

In detail, with respect to the flange (22) forming the abutment (20), the end portion (21) formed on one side of the longitudinal direction of the abutment (20) can be removably connected to the connecting portion (200) formed on the receiving member (120) to be described later. In addition, with respect to the flange (22) forming the abutment (20), the cone-shaped portion formed on the other side of the longitudinal direction of the abutment (20) can be said to be a portion that is inserted into the inside of the object to be processed (10) and connected to the object to be processed (10).

Meanwhile, a buffer part (30) made of zirconia may be interposed between the longitudinal side of the abutment (20) and the object to be processed (10). The buffer part (30) serves to prevent fracture in advance due to a difference in physical properties between the object to be processed (10) and the abutment (20), and also serves to maintain the bonding force between the object to be processed (10) and the abutment (20).

The workpiece (10) configured as above and integrally connected with the abutment (20) can be mounted on a jig (not shown) of a cutting processing device by a fixing holder (100) according to one embodiment of the present invention.

As illustrated in FIGS. 1 to 4, a fixing holder (100) according to one embodiment of the present invention may largely include a connecting portion (110) that is mounted on one side in the longitudinal direction (direction of arrow X illustrated in FIG. 1) to a jig of a cutting processing device; and a connecting portion (200) that is provided on the other side in the longitudinal direction of the connecting portion (110) and is coupled with an end portion (21) of the abutment (20) that is integrally connected to a processing target (10).

First, the above-mentioned connecting part (110) can be said to be a component that is combined with a jig of a cutting processing device.

The connecting part (110) may include a connecting pin (111) that can be inserted into a joining hole formed in the jig; and an expanding member (112) that is integrally connected to the connecting pin (111) and has an outer diameter larger than the outer diameter of the connecting pin (111) and is positioned to face an end portion in the longitudinal direction (direction of arrow X shown in FIG. 1) of the processing target (10).

The connecting pin (111) is a component that is inserted into a joining hole formed in a jig of a cutting processing device as described above, and is also a part that is held by the worker's hand.

The connecting pin (111) has a size and shape that can be inserted into the joining hole formed in the jig, and a portion of its outer surface can be cut to form a notch. The notch can serve as a guide so that the connecting pin (111) can be inserted into the joining hole in a set direction.

As described above, the expansion member (112) can be positioned facing the longitudinal end of the workpiece (10) with an outer diameter larger than the outer diameter of the connecting pin (111).

The expansion member (112) serves to prevent the workpiece (10) and the receiving member (120) described below from flowing or deforming due to the load generated by the cutting tool when the cutting tool of the cutting processing device comes into direct contact with the workpiece (10) and cuts the workpiece (10).

That is, the expansion member (112) can serve as a support to prevent the receiving member (120) connected to the end (21) of the abutment (20) from unintentionally flowing or deforming due to a load generated from the cutting tool.

In addition, a hollow receiving member (120) is formed protrudingly in the center of one side of the expansion member (112) to be combined with the end (21) of the abutment (20) integrally connected to the processing target (10).

At this time, the connecting portion (200) that is connected to the end (21) of the abutment (20) can be formed inside the receiving member (120) in the form of a fixing groove.

In addition, the length of the receiving member (120) protruding from one side of the expansion member (112) is preferably smaller than the total length of the processing target (10) and the length of the end (21) of the abutment (20), and further, it is preferably shorter than the total length of the abutment (20).

If it is assumed that the entire length of the receiving member (120), i.e., the length protruding from one side of the expanding member (112), is equal to or longer than the entire length of the abutment (20) or the entire length of the workpiece (10), the receiving member (120) may become deformed or damaged due to not being able to withstand the load generated from the cutting tool.

Therefore, as described above, the length of the receiving member (120) protruding from one side of the expansion member (112) is preferably smaller than the total length of the workpiece (10) and the length of the end (21) of the abutment (20), and further, it is preferably shorter than the total length of the abutment (20).

As described above, the above-mentioned connecting portion (200) can be formed in the receiving member (120) in the form of a fixing groove into which the longitudinal end (21) of the abutment (20) is inserted and fixed.

The fixing groove-shaped joint (200) can be formed only in a part of the entire longitudinal section formed by the receiving member (120). That is, the fixing groove can be formed only in the other side of the longitudinal section of the receiving member (120) as shown in Fig. 3.

In addition, a fastening hole (121) may be formed in the remaining lengthwise section of the receiving member (120) where the fixing groove is not formed and in a portion of the thickness direction (arrow X direction shown in FIG. 1) of the expanding member (112). That is, a fastening hole (121) may be formed in one portion of the lengthwise section of the receiving member (120) and in a portion of the thickness direction of the expanding member (112).

The above fastening hole (121) can be screw-connected with a fastening member inserted into a receiving member (120) after sequentially passing through the through hole (11) of the processing target (10) and the interior of the abutment (20).

Accordingly, when the end (21) of the abutment (20) integrally connected to the workpiece (10) is inserted into the fixing groove in the receiving member (120), and the fastening member is coupled with the fastening hole (121) of the receiving member (120), the workpiece (10) and the abutment (20) can be removably coupled to the receiving member (120).

For reference, the anchoring groove can be formed according to the shape of the end (21) of the abutment (20). For example, if the end (21) of the abutment (20) is circular, the anchoring groove can also be formed in a circular shape in the receiving member (120). As another example, if the end (21) of the abutment (20) is a polygon such as a pentagon or a hexagon, the anchoring groove can also be formed in a polygonal shape in the receiving member (120) correspondingly.

Meanwhile, a first reference mark (M1) that can be visually confirmed by a worker may be displayed or formed on the circumference of the receiving member (120) or the circumference of the expanding member (112).

The first reference mark (M1) can be displayed or formed on the peripheral surface of the receiving member (120) or the peripheral surface of the expanding member (112) by a known printing method or a known engraving technique that forms an intaglio or relief on the surface of the object.

At this time, the first reference mark (M1) displayed or formed on the circumference of the receiving member (120) and the circumference of the expanding member (112) can be aligned with the longitudinal axis (arrow X direction shown in FIG. 4) that divides the fixing holder (100) in half.

The above first reference mark (M1) can correspond to the second reference mark (M2) displayed or formed on the outer surface of the processing target (10) when the end (21) of the abutment (20) is inserted and seated in the seating groove.

For reference, the second reference mark (M2) can also be displayed or formed on the outer surface of the processing target (10) by a known printing method or a known engraving technique that forms an intaglio or relief on the surface of the target.

The second reference mark (M2) can be displayed or formed on the circumferential surface or longitudinal surface of the processing target (10), as shown in FIG. 2 and FIG. 4.

When the first reference mark (M1) and the second reference mark (M2) correspond to each other, the machining direction of the workpiece (10) can be set. Therefore, the worker can easily set the machining direction of the workpiece (10) within the cutting processing device simply by matching the first reference mark (M1) displayed or formed on the fixing holder (100) with the second reference mark (M2) displayed or formed on the workpiece (10).

For reference, although the shape of the workpiece (10) illustrated as an example is cylindrical, the shape of the workpiece (10) is not limited to a cylinder, and may have various shapes such as a rectangular solid or a pseudo-rectangular solid, and the directionality of the workpiece (10) may be different depending on the type or manufacturer of the cutting processing device. However, the fixing holder (100) of the present invention allows the operator to easily set the directionality of the workpiece (10). In other words, the convenience of the work can be provided by allowing the operator to perform the processing work without having to set the directionality of the workpiece (10) one by one during the nesting process of the cutting processing device program.

In addition, the fixed holder (100) according to one embodiment of the present invention is preferably manufactured from a metal material having excellent corrosion resistance and strength, such as titanium, in order to increase rigidity according to the load generated from the cutting tool or mechanical strength, and in particular, it is more preferable to manufacture the fixed holder (100) by integrally connecting the connecting pin (111), the expanding member (112), and the receiving member (120) to each other by a known molding method. Therefore, the fixed holder (100) according to one embodiment of the present invention has the advantage of being able to be used semi-permanently over a number of times.

In addition, the fixing holder (100) according to one embodiment of the present invention can be used semi-permanently, unlike the existing disposable fixing holder that is discarded together with the processing object (10) that is discarded unprocessed, and thus, ultimately, the cost of manufacturing artificial teeth can be reduced.

Although specific embodiments of the present invention have been described so far, it is obvious that various modifications are possible within the scope of the present invention.

For example, in one embodiment of the present invention, a fixing groove-shaped joint (200) that is coupled with an end (21) of an abutment (20) is described and illustrated in the drawings as being formed inside a receiving member (120) that protrudes from one surface of an expanding member (112), but is not limited thereto.

That is, the fixing groove-shaped joint (200) may be formed in the center of one side of the expanding member (112), as shown in FIG. 6.

The above-mentioned joint (200) can be formed in a portion of the longitudinal direction (direction of arrow X shown in FIG. 6) of the expanding member (112).

And, in the remaining lengthwise section of the expanding member (112) where the fixing groove-shaped connecting portion (200) is not formed, a connecting hole (not shown) that is screw-connected with a connecting member (not shown) passing through the inside of the abutment (20) may be formed. At this time, the connecting hole may be formed up to a portion of the lengthwise section of the connecting pin (111).

In other words, a connecting portion (200) in the form of a fixing groove into which the end portion (21) of the abutment (20) is inserted and fixed, and a fixing hole into which the fixing member is inserted can be sequentially formed in the center of one side of the expansion member (112).

When the fixed holder (100') having the above configuration is inserted and seated in the fixing groove-shaped joint (200) with the end (21) of the abutment (20), one surface of the expanding member (112) can come into contact with the processing target (10).

In detail, when the end portion (21) of the abutment (20) is inserted into the fixing groove and fixed, the longitudinal end portion of the workpiece (10) facing the expanding member (112) may come into contact with one surface of the expanding member (112). Accordingly, the longitudinal end portion of the workpiece (10) can be processed while being supported by one surface of the expanding member (112).

In addition, a first reference mark (M1) that can be visually confirmed by a worker may be marked or formed on the circumference of the expansion member (112). In addition, when the end (21) of the abutment (20) is inserted and settled into the fixing groove, the first reference mark (M1) may coincide with a second reference mark (M2) marked or formed on the outer surface of the workpiece (10).

Since the first reference mark (M1) and the second reference mark (M2) have the same configuration as the first reference mark (M1) and the second reference mark (M2) described in one embodiment of the present invention, a detailed description of the configuration is omitted below.

As above, a fixing groove-shaped joint (200) into which the end (21) of the abutment (20) is inserted is formed on one surface of the expanding member (112), and the workpiece (10) can be placed on the expanding member (112) and then mounted on a jig of a cutting processing device.

In addition, as shown in Fig. 7, the expansion member (112) may be omitted and a mounting groove and a fastening hole may be sequentially formed on the other longitudinal end of the connecting pin (111).

Meanwhile, the connecting portion (200) having the shape of the above-described fixing groove may be formed on one side of the expanding member (112) or the receiving member (120) in a shape corresponding to the type of the abutment (20). In FIGS. 9 and 10, the connecting portion (200) having the shape of the fixing groove is illustrated as being formed on the receiving member (120).

As shown in FIGS. 9 and 10, in the case of a non-submerged type abutment (20), only its end (21) is inserted into a connecting portion (200) in the form of a fixing groove formed in a receiving member (120), and the remaining outer surface may not be inserted into the connecting portion (200).

For reference, the outer surface (23) of the abutment (20) that is not inserted into the fixing groove-shaped joint (200) may be arranged in the same line as the outer surface of a fixture (not shown) or the outer surface of a receiving member (120).

And, as illustrated in FIGS. 11 and 12, the connecting portion (200') provided on the other side in the longitudinal direction of the connecting portion (110) may be formed in the form of a connecting projection rather than a fixing groove to protrude from one surface of the expanding member (112) or the end of the receiving member (120) in order to be combined with the external type abutment (20). In FIGS. 11 and 12, the connecting portion (200') having the form of a connecting projection is illustrated as being formed on the end of the longitudinal direction of the receiving member (120).

In the case of an external type abutment (20), as shown in FIGS. 11 and 12, a groove is formed on one side in the longitudinal direction for joining with a fixture.

Accordingly, a connecting portion (200') having the form of a connecting projection can be formed in a raised shape by protruding from one side of the expanding member (112) or an end of the receiving member (120) in order to be inserted into the groove.

In this way, it goes without saying that the connecting portion (200, 200') according to one embodiment of the present invention can be formed in the form of a fixing groove or a connecting protrusion on one side of the expanding member (112) or the receiving member (120) corresponding to various types of abutments (20).

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the claims below but also by equivalents of the claims.

The present invention can be applied and sold in the dental medical industry.

Claims (13)

As a fixed holder for mounting a workpiece with an abutment integrally connected to a cutting processing device, A connecting part connected to the jig of the above cutting processing device; and A fixing holder characterized by including a connecting portion provided on the other side in the longitudinal direction of the connecting portion and connected to an end portion of the abutment. In paragraph 1, The above connecting part, A connecting pin that can be inserted into a joining hole formed in a jig of the above cutting processing device; and A fixed holder characterized by including an expanding member that is integrally connected to the connecting pin and is positioned facing the processing target while having an outer diameter larger than the outer diameter of the connecting pin. In the second paragraph, A hollow receiving member is formed protruding in the center of one side of the above-mentioned expansion member, A fixing holder characterized in that the connecting portion, which is connected to the end of the abutment, is formed in the receiving member in the form of a fixing groove. In the third paragraph, A fixed holder, characterized in that the above-mentioned connecting portion is formed in a portion of the length direction of the above-mentioned receiving member. In paragraph 4, A fixing holder characterized in that a fixing hole is formed in the longitudinal remaining section of the receiving member and the expanding member to be screw-connected with a fixing member passing through the interior of the abutment. In paragraph 4, A fixed holder characterized in that a first reference mark that can be visually confirmed by a worker is displayed or formed on the circumference of the above-mentioned receiving member. In paragraph 6, The above first standard mark is, A fixing holder characterized in that when the end of the abutment is inserted and fixed in the above-mentioned joint, it corresponds to the second reference mark displayed or formed on the outer surface of the workpiece. In the second paragraph, A fixing holder characterized in that the connecting portion, which is connected to the end of the abutment, is formed in the form of a fixing groove at the center of one side of the expanding member. In Article 8, A fixing holder, characterized in that the above-mentioned connecting portion is formed in a portion of the longitudinal direction of the expanding member. In Article 9, A fixing holder characterized in that a fastening hole is formed in the longitudinal remaining section of the above-mentioned expansion member or in a longitudinal part of the above-mentioned connecting pin to be screw-connected with a fastening member passing through the interior of the above-mentioned abutment. In Article 9, A fixed holder characterized in that a first reference mark that can be visually confirmed by a worker is displayed or formed on the circumference of the above-mentioned expansion member. In Article 11, The above first standard mark is, A fixing holder characterized in that when the end of the abutment is inserted and fixed in the above-mentioned joint, it corresponds to the second reference mark displayed or formed on the outer surface of the workpiece. In the second paragraph, A fixing holder characterized in that the above-mentioned connecting portion is formed by protruding from one surface of the expanding member or an end of a receiving member formed by protruding from one surface of the expanding member in the form of a connecting projection.

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