KR20160008887A - Abutment screw removal drill and abutment screw removal instrument - Google Patents

Abstract

The present invention relates to an abutment screw removal drill and, more specifically, to an abutment screw removal drill which drills an upper face of an abutment screw as the drill rotates after being placed on an upper part of the abutment screw so as to remove, from a fixture, the abutment screw which is coupled by the screw onto a certain fixture used for implant placement. According to the present invention, the abutment screw removal drill comprises: a driving shaft connection part coupled to a specific driving apparatus; and a cutting part connected to the driving shaft connection part and being closed to the abutment screw so as to carry out drilling of the abutment screw, wherein the driving shaft connection part and the cutting part contain materials with each different hardness. In addition, the present invention relates to an abutment screw removal drill of which the rotatory direction of the abutment screw removal drill is opposite to that of which the abutment screw coupled to the fixture by the screw.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an abutment screw removal drill and an abutment screw removal apparatus,

The present invention relates to an abutment screw removing drill, and more particularly, to an abutment screw removing drill which is placed on the upper end of the abutment screw so as to remove an abutment screw screwed to a predetermined fixture used for implant placement An abutment screw removing drill for piercing the upper surface of the abutment screw in accordance with the rotation, the abutment screw removing drill comprising: a drive shaft connecting part connected to a predetermined power unit; And a cutting part connected to the driving shaft connecting part and contacting the abutment screw to perform the punching of the abutment screw, wherein the driving shaft connecting part and the cutting part include materials having different hardness from each other, and the abutment screw The rotation direction of the removal drill is an opposite direction to a rotation direction in which the abutment screw is screwed to the fixture.

Implants are alternatives that restore body tissue when the body tissue is lost, but artificial teeth in dentistry. These implant procedures are becoming an alternative treatment method that can be restored and reconstructed by the function of the original magnetic tooth when the tooth is lost or the tooth function is deteriorated. FIG. 1 is a view showing an example of a configuration of an implant. In general, a tooth implant is composed of titanium and is fixed to the alveolar bone by being fixed to the alveolar bone. The fixture 10 is fixed on the fixture 10 to fix the prosthesis 40 An abutment 30 for supporting the abutment 30 and an abutment screw 20 for fixing the abutment 30 to the fixture 10 and an abutment screw 20 for fixing the abutment 30 to the abutment 30. [ And a prosthesis 40. Because of this natural tooth substitution function, the generalization and popularization of implants were achieved for a short period of time, and the number of implants placed in the implants is increasing with the passage of time, both nationally and internationally, and many implants are now placed In fact.

Implants are subjected to lateral or lateral pressure due to the masticatory function (chewing function of food), which is one of the functions of the teeth. When the implant is repeatedly subjected to excessive force, the implants and the components connected to the implants become abnormal . More specifically, the abutment and abutment screw combined with the implant are subjected to repetitive forces for a long period of time, or momentarily excessive force, resulting in loosening and fracture of the components. FIG. 2 is a view showing an example of a form in which the abutment screw 20 of the implant is broken and the implant is broken. In such a case, the abutment screw 20 may be broken.

These loosening and fracture fail to function as the original implants, and occasionally fractures require removal of the fractured parts and replacement with new components, resulting in discomfort to the practitioner or patient. Particularly, when a part of the abutment 30 is broken, or when the abutment screw 20 is partially broken and connected to the inside of the implant, it is difficult to remove the abutment with a general dental treatment instrument. The removal was much more difficult due to the high binding force when it occurred.

In more detail, when a fracture occurs, the fractured surface is generally removed by rotating the fractured surface in a counterclockwise direction, or if it is stronger than the fractured surface, And a method of removing it by using the method. However, in the process of forming the predetermined hole, it is difficult to form a hole on the upper surface of the fracture screw using a stainless steel material type drill used in general dentistry. Because the abutment 30 uses a high strength and high hardness material to withstand external forces such as masticating force, the general dental stainless steel material has a hardness or strength relative to the fractured abutment screw 20 It is difficult to form a hole on the fracture surface due to the incomplete cutting edge during the process of eliminating or eliminating the abutment 30 that has been broken down. In order to solve this problem, it is necessary to make a cutting edge by using a material having hardness higher or higher than that of the broken abutment screw 20. In the case of a material having a high hardness, it is difficult to produce a cutting edge. Hardness, etc.), it is necessary to grind the cutting material by the method of cylindrical grinding, plane grinding, inner grinding, etc. Therefore, the processing time is long And it is costly to realize a complicated shape.

Public utility model 20-2011-0007721

SUMMARY OF THE INVENTION The present invention is conceived to solve the problems described above, and it is an object of the present invention to provide a dental cutting drill for removing a broken abutment or forming a predetermined hole, A relatively easy-to-process stainless steel material is applied to the drive shaft connection portion to which rotational force is applied from the drive shaft, and a tip material has relatively harder material than a purged abutment screw which can remove the broken abutment screw We propose an abutment screw removal drill which is manufactured by using the method of manufacturing by dipping, and the manufacturing time is reduced and the manufacturing cost is reduced. In addition, the application range is not limited to the broken abutment screw, but can be applied to all areas where a predetermined hole is to be formed in a part related to the dentistry.

Accordingly, it is an object of the present invention to provide an abutment screw which is placed on the upper end of the abutment screw so as to remove an abutment screw screwed to a predetermined fixture used for implant placement, An abutment screw removing drill for drilling the abutment screw, comprising: a drive shaft connecting part connected to a predetermined power unit; And a cutting part connected to the driving shaft connecting part and contacting the abutment screw to perform the punching of the abutment screw, wherein the driving shaft connecting part and the cutting part include materials having different hardness from each other, and the abutment screw Wherein the rotation direction of the removal drill is opposite to the rotation direction in which the abutment screw is screwed to the fixture.

In order to achieve the above object, an abutment screw removing drill according to the present invention is characterized in that the abutment screw removing drill according to the present invention is provided with an abutment screw- The abutment screw removing drill is configured to puncture the upper surface of the abutment screw by rotating the abutment screw on the driving shaft connecting portion. And a cutting part connected to the driving shaft connecting part and contacting the abutment screw to perform the punching of the abutment screw, wherein the driving shaft connecting part and the cutting part include materials having different hardness from each other, and the abutment screw The rotation direction of the removal drill is configured in a direction opposite to a rotation direction in which the abutment screw is screwed to the fixture,

 The cutting portion includes a carbide material (a material or a tool made of an ultra-hard alloy)

In addition, the cutting portion may include a high speed steel (HSS).

Preferably, the cutting portion includes a coating layer coated on the outer surface, and the coating layer may be TiN, WCC, AlTiN.

Preferably, the cutting portion and the driving shaft connecting portion are press-fitted to each other, wherein one of the cutting portion and the driving shaft connecting portion has a depressed groove, and the other has a protruding portion which is press-fitted into the groove.

Preferably, the grooves and the protrusions are formed in a non-circular shape or have a cross section in which a predetermined hook is formed in a circular cross section so that the cutting section co-rotates in accordance with the rotation of the drive shaft connection section.

Preferably, the cutting portion includes a plurality of cutting blade portions in contact with the abutment screw on the front surface, and the cutting blade portion is configured symmetrically or asymmetrically with respect to the central axis.

Preferably, the cutting blade portion is formed with a cutting edge so as to perform perforation in a direction rotating counterclockwise.

Preferably, the rotation direction of the abutment screw removing drill is configured to be counterclockwise.

The apparatus for removing abutment screws according to the present invention is an apparatus for removing abutment screws screwed to a predetermined fixture used for implant placement from the fixture, An abutment screw removing drill that punctures the upper surface of the abutment screw when the abutment screw is rotated; And a guide connector for guiding the drill so that the abutment screw removing drill is erected on an upper portion of the abutment screw, wherein the abutment screw removing drill includes a drive shaft connecting portion connected to a predetermined power device, And a cutting portion connected to the driving shaft connecting portion and contacting the abutment screw to perform the punching of the abutment screw, wherein the driving shaft connecting portion and the cutting portion include materials having different hardness from each other, and the abutment screw removing drill Wherein the rotation direction is configured in a direction opposite to a rotation direction in which the abutment screw is screwed to the fixture, the guide connector includes a guide hole for guiding the abutment screw removing drill through the guide hole, And the cutting portion has a supporting portion for supporting a position Vagina (material or tool made of an ultra-hard (super hard) alloy). In addition, the cutting portion includes a high speed steel (HSS).

Advantageously, the guide connector includes a guide window through which at least one side is perforated so that the interior is visually captured.

Preferably, the extraction tab is inserted into the apertures formed by the abutment screw removing drill and is fastened to the abutment screw, and the extraction tab is provided with the abutment screw So that the abutment screw can be removed.

Preferably, the extraction tab and the abutment screw are screwed together, and the screwing direction between the extraction tab and the abutment screw is a direction opposite to a screwing direction between the abutment screw and the fixture Respectively.

Preferably, the screw engagement direction between the extraction tab and the abutment screw is configured in a counterclockwise direction.

The abutment screw removing drill according to the present invention comprises a cutting part and a drive shaft connecting part, wherein the cutting part and the drive shaft connecting part are made of materials having different hardnesses, so that the structure of the abutment screw removing drill can be easily made have. That is, the cutting portion which is substantially in contact with the abutment screw is made of a material having high hardness to prevent abrasion, and the driving shaft connecting portion used for transmitting the rotating force is made of a material that is easy to process, have. Further, as the width of material selection increases, the material cost can be reduced in the manufacturing process. This can be more advantageous in terms of durability and visibility of the procedure when the coating layer is constructed as described above.

The rotation direction of the abutment screw removing drill is configured to be opposite to the rotating direction in which the abutment screw is screwed to the fixture. In the drilling process by the abutment screw removing drill, The rotation of the abutment screw is performed in a direction opposite to the direction in which the abutment screw is fastened, so that the abutment screw is not tightened in the boring process, but is received in a direction in which the fastening is reversed. Therefore, it is possible to facilitate removal in the removal process after perforation.

The apparatus for removing abutment screws according to the present invention is characterized in that the position of the abutment screw removing drill is fixed and the abutment screw removing drill is prevented from being displaced can do.

Further, the extraction tab is provided, and the extraction tab and the abutment screw are screwed together, and the screwing direction between the extraction tab and the abutment screw is opposite to the screwing direction between the abutment screw and the fixture As shown in Fig. As a result, coupling between the extraction tab and the abutment screw is achieved without displacement or deviation of the fixture, and the abutment screw can be easily removed from the fixture. More specifically, the extraction tab may be further provided with a latching part on the extraction tab for increasing the coupling force with the abutment screw.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an example of a configuration of an implant. Fig.
2 is a view showing an example of a form in which an abutment screw of an implant is broken and an implant is broken.
3 is a view showing an abutment screw removing drill according to an embodiment of the present invention.
FIG. 4 is a view illustrating a coupling between a driving shaft connecting portion and a cutting portion of an abutment screw removing drill according to an embodiment of the present invention.
FIGS. 5A and 5B are views showing a coupling between a drive shaft connecting portion and a cutting portion of an abutment screw removing drill according to an embodiment of the present invention.
6 is a view illustrating a state in which an abutment screw removing drill according to an embodiment of the present invention is coupled to an abutment screw through a guide connector.
7 is a view illustrating drilling of an abutment screw using an abutment screw removing drill according to an embodiment of the present invention.
8 is a view showing the shape of a guide connector of an abutment screw removing apparatus according to an embodiment of the present invention.
9 is a view showing an extraction tab of an abatement screw removing apparatus according to an embodiment of the present invention.
10 and 11 are views showing removal of an abutment screw by an extraction tab of an abutment screw removing apparatus according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present embodiments are not intended to be limiting.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprises, "and / or" comprising ", as used herein, unless the recited element, step, operation and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

FIG. 3 is a view showing an abutment screw removing drill 100 according to an embodiment of the present invention. FIG. 4 is a perspective view of the abutment connecting part 130 (FIG. 3) of the abutment screw removing drill 100 according to the embodiment of the present invention. 5A and 5B are views showing a coupling shape between the driving shaft connecting part 130 and the cutting part 110 of the abutment screw removing drill 100 according to the embodiment of the present invention, FIG. 6 is a view showing a state in which the abutment screw removing drill 100 according to the embodiment of the present invention is inserted into the abutment screw M through the guide connector 200 FIG. 7 is a view showing the drilling of the abutment screw M using the abutment screw removing drill 100 according to the embodiment of the present invention, and FIG. The gauge of the abutment screw removing device according to the example FIG. 9 is a view showing an extraction tab of an abatement screw removing apparatus according to an embodiment of the present invention, and FIGS. 10 to 11 are views showing an abutment according to an embodiment of the present invention. And removal of the abutment screw (M) by the extraction tab (300) of the screw removing device.

In order to achieve the above object, an abutment screw removing drill according to the present invention is characterized in that an abutment screw (M) screwed to a predetermined fixture (N) used for implant placement is removed from the fixture An abutment screw removing drill (100) for puncturing the upper surface of the abutment screw (M) while rotating on the upper end of the abutment screw (M), the abutment screw removing drill A driving shaft connecting part 130 connected to a predetermined power unit; And a cutting part 110 connected to the driving shaft connecting part 130 and contacting with the abutment screw M to perform the punching of the abutment screw M. The driving shaft connecting part 130, Wherein the rotation direction of the abutment screw removing drill 100 is a direction in which the abutment screw M is screwed to the fixture N In the opposite direction.

The abutment screw removing drill 100 is placed on the upper surface of the broken abutment screw M and is provided to puncture the upper surface of the abutment screw M as it rotates. Accordingly, the abutment screw removing drill 100 may include a driving shaft connecting part 130 connected to a predetermined power unit to receive a rotational force, and a driving shaft connecting part 130 connected to the driving shaft connecting part 130 to connect the upper end of the abutment screw M, And a cutting portion 110 which is brought into contact with the surface to perform the actual punching.

The driving shaft connecting part 130 is formed in a beam shape extending with a predetermined length and has connecting means 132 connected to a predetermined power device at an upper end or at least a part thereof to receive the rotational force of the power device. Preferably, the drive shaft connection part 130 is formed in a cylindrical shape having a circular cross section as a whole, so that the rotation center axis does not deviate from the rotation axis during the rotation process. The connecting means 132 may include a predetermined fitting groove for achieving fitting. In addition, a predetermined connection part may be formed at one end of the drive shaft connection part 130 so that the cut part 110 is connected.

The cutting portion 110 is composed of a member that contacts with the upper surface of the abutment screw M and substantially performs perforation. The cutting portion 110 is configured to rotate by receiving a rotational force transmitted from the driving shaft connecting portion 130 and connected to the driving shaft connecting portion 130. The cutting portion 110 may be configured to have the same cutting edge as a predetermined cutting edge portion have. Preferably, the drive shaft connecting part 130 and the cutting part 110 share a rotation axis (coaxial) and maintain the center axis so that the drive shaft connection part 130 and the cutting part 110 maintain a uniform rotation. The cutting portion 110 may also have a cylindrical shape as a whole. In addition, a predetermined connection portion may be provided to be connected to a connection portion provided in the drive shaft connection portion 130. [ Meanwhile, the cutting 110 and the drive shaft connecting part 130 can be coupled by press-fitting, but may also include various joining methods such as welding or heat shrinking.

Meanwhile, the cutting portion 110 and the driving shaft connecting portion 130 may include materials having different hardnesses. That is, the cutting portion 110 includes a material which substantially abuts against the abutment screw M to perform the punching, and which has high hardness and is not easily abraded. The driving shaft connecting portion 130 is substantially Since it is a member that transmits a rotational force without contacting the abutment screw M, it can include a material having a relatively low hardness and being easy to process as compared with the cutting portion 110.

For example, the drive shaft connecting portion 130 may include a relatively high workability material and may include stainless steel. On the other hand, the cutting portion 110 may include a material having a high hardness, such as a material or a tool made of a carbide (super hard) alloy. In addition, the cutting portion may further include a high speed steel (HSS).

According to another embodiment, the cutting portion 110 may include a coating layer coated on the outer surface. The coating layer may have a predetermined thickness on the outer surface of the cutting portion 110 to prevent the cutting portion 110 from being worn during the drilling process and may be formed over the entire outer surface of the cutting portion 110, But the present invention is not limited thereto. Meanwhile, the coating layer may be any one of TiN, AlTiN, and WCC.

As described above, since the cutting portion 110 and the drive shaft connecting portion 130 are made of materials having different hardnesses, the structure of the abutment screw removing drill 100 according to the present invention can be easily made. That is, the cutting portion 110, which is substantially in contact with the abutment screw M, is made of a material having a high hardness, so that the drive shaft connecting portion 130, which is excellent in durability and prevents abrasion, It can be easily processed in the manufacturing process. Further, as the width of material selection increases, the material cost can be reduced in the manufacturing process, which is more advantageous when the coating layer is formed as described above.

The rotation direction of the abutment screw removing drill 100 is configured to be opposite to the rotation direction in which the abutment screw M is screwed to the fixture N. [

At this time, when the abutment screw M is rotated clockwise with respect to the fixture N and screwed thereto, the rotation direction of the abutment screw removing drill 100 is opposite to the direction It is possible to perform the perforation by rotating counterclockwise.

6, the abutment screw removing drill 100 is inserted into contact with the upper surface of the abutment screw M, and then the abutment screw removing drill 100, (100) rotates to perform perforation on the abutment screw (M). 6 (A) shows a state in which the abutment screw removing drill 100 is engaged. FIG. 6 (B) shows a state in which the abutment screw removing drill 100 is in contact with the abutment screw M FIG. 2 is an enlarged view of a state in which it is in contact with an upper surface.

At this time, when the abutment screw M rotates in the direction of the arrow D and is fastened to the fixture N, the abutment screw removing drill 100 rotates in the direction of arrow A to perform perforation. Here, the arrow D indicates the direction in which the abutment screw M is rotated when the abutment screw M is fastened to the fixture N. As shown in Fig. 7, the arrow A and the arrow D are opposite to each other, the arrow A is counterclockwise, and the arrow D is clockwise. 6, a predetermined guide connector 200 is provided to facilitate insertion and rotation of the abutment screw removing drill 100. The guide connector 200 will be described later.

Accordingly, in the drilling process by the abutment screw removing drill 100, the rotation of the abutment screw removing drill 100 is performed in the opposite direction to the fastening direction of the abutment screw M, During the drilling process, the abutment screw M is subjected to a force in a direction in which the binding is released rather than binding. 7, as the abutment screw removing drill 100 rotates in the direction of the arrow A, the abutment screw removing drill 100 descends in the direction of the arrow B and performs perforation, The abutment screw (M) also receives a force in the direction of arrow A. On the other hand, the direction of the arrow A is opposite to the direction D, which is the direction in which the abutment screw M is fastened to the fixture N, so that the direction in which the fastening between the abutment screw M and the fixture N is released The abutment screw M is subjected to the force so that the abutment screw M rises in the direction of the arrow C to release the engagement.

Therefore, it is possible to facilitate removal in the removal process after perforation. In addition, in this process, vibration is applied to the broken abutment screw M so that the coupling is released and can be easily removed. Accordingly, the procedure time is shortened and the convenience of the procedure is improved, so that the burden of the operation is alleviated to the practitioner, and the pain caused by the procedure can be reduced in the patient.

Accordingly, the cutting portion 110 may have a structure favorable to removal of the abutment screw M.

Preferably, the cutting portion 110 includes a plurality of cutting blade portions in contact with the abutment screw M on the front surface, and the cutting blade portion may be configured to be symmetrical or asymmetric with respect to the central axis. That is, for example, as shown in partially enlarged view in FIG. 3, the cutting portion may have a plurality of cutting blade portions having different sizes about the central axis, but is not limited thereto.

The cutting blade part may be formed on the front surface of the cutting part 110. Here, the front face is a portion which is practically in contact with the abutment screw M and performs perforation, and can be grasped as a lower end portion, a side end portion or the like depending on the orientation.

A plurality of the cutting blade portions may be provided. For example, the cutting blade portion may be formed by cutting a portion of the front portion of the cutting portion 110 to form a sharp protruding portion. Accordingly, it is possible to easily perform the punching of the abutment screw M.

The cutting blade portion may be symmetrical or asymmetric about the central axis.

Preferably, the cutting blade portion may be formed with a cutting edge to perform perforation in a direction rotating counterclockwise. That is, as described above, the rotation direction of the abutment screw removing drill 100 is rotated in the opposite direction to the direction in which the abutment screw M is fastened to the fixture N, The cutting edge formed in the cutting edge portion can perform the perforation when the cutting edge 110 rotates in the counterclockwise direction.

Preferably, the cutting portion 110 and the drive shaft coupling portion 130 are press-fitted to each other, and one of the cutter portion 110 and the drive shaft coupling portion 130 has a recessed groove 134, And one may have a protrusion 112 which is press-fitted into the groove 134.

As shown in FIG. 4, the cutting portion 110 and the driving shaft connecting portion 130 are detachable as separate members, and can be press-fitted. Accordingly, the cutting portion 110 and the drive shaft connecting portion 130 can be firmly fitted and coupled by interference fit.

At this time, any one of the cutting portion 110 and the drive shaft connecting portion 130 has a recessed groove 134 and the other has a protruding portion 112 which is press-fitted into the groove 134 . For example, as shown in FIG. 4, the cutting portion 110 may have a protruding portion 112 and the driving shaft connecting portion 130 may have a groove 134, and vice versa.

The grooves 134 and the protrusions 112 may be formed in a noncircular shape or may be formed in a circular cross section so that the cutter 110 rotates in accordance with the rotation of the drive shaft connection part 130. [ The hook portion may have a cross section formed thereon.

5A and 5B, the grooves 134 and the protrusions 112 may have a polygonal configuration, or a portion of the protrusions may be protruded or recessed to form a deformed circular configuration with the hanger portion 114 Lt; / RTI > Accordingly, the groove 134 and the protrusion 112 may have a non-circular cross-section. Here, the term " non-circular " is a concept excluding a circle having a uniform diameter, and can be understood as a concept including a polygon, a deformed circle, and an ellipse having a long diameter and a short diameter. As described above, the grooves 134 and the protrusions 112 are fitted and press-fitted into each other, so that the shape of the grooves 134 and the shape of the protrusions 112 preferably correspond to each other.

Accordingly, the cutting portion 110 can be easily rotated by the driving shaft connecting portion 130 and rotated. That is, if the grooves 134 and the protrusions 112 have a circular cross-section, the cuts 110 may be staggered despite the rotation of the drive shaft connection part 130. However, The rotational force of the driving shaft connecting part 130 can be completely transmitted to the cutting part 110 as the pressing part 112 is formed into a non-circular shape.

Hereinafter, an abutment screw removing apparatus having the above-described abutment screw removing drill 100 will be described.

Preferably, the abutment screw removing apparatus according to the present invention includes an abutment for removing an abutment screw M screwed to a predetermined fixture N used for implant placement from the fixture N, An apparatus for removing screws, comprising: an abutment screw removing drill (100) for puncturing an upper surface of the abutment screw (M) while rotating on an upper end of the abutment screw (M); And a guide connector (200) for guiding the abutment screw removing drill (100) so that the abutment screw removing drill (100) is erected on the upper part of the abutment screw (M), and the abutment The screw removal drill (100) includes a drive shaft connection part (130) connected to a predetermined power unit; And a cutting part 110 connected to the driving shaft connecting part 130 and contacting with the abutment screw M to perform the punching of the abutment screw M. The driving shaft connecting part 130, Wherein the rotation direction of the abutment screw removing drill 100 is a direction in which the abutment screw M is screwed to the fixture N The guide connector 200 includes a guide hole 210 through which the abutment screw removing drill 100 is inserted and guided and a guide hole 210 which is supported on the fixture N to fix the position And a supporting portion 220.

The abutment screw removing apparatus according to the present invention includes the abutment screw removing drill 100 described above. The abutment screw removing drill 100 is as described above, and the same explanation is omitted.

6, the guide connector 200 can guide the abutment screw removing drill 100 upright on the abutment screw M. As shown in Fig. Accordingly, the guide connector 200 may have a predetermined guide hole 210 coupled with the fixture N and formed to penetrate the abutment screw removing drill 100. At this time, the guide hole 210 may be formed as a circular hole so that the abutment screw removing drill 100 can be rotated easily.

In addition, the guide connector 200 may have a predetermined support portion 220 that is supported on the fixture N and fixes its position. The support portion 220 is supported and fixed in the fixture N so that the abutment screw removal drill 100 is placed on the upper surface of the abutment screw M and guides the drill .

Meanwhile, the guide connector 200 may have a predetermined grip portion 240 gripped by a user to place the gripper on the fixture N and to manipulate the position, but the present invention is not limited thereto.

As the guide connector 200 is provided, the position of the abutment screw removing drill 100 is fixed and it is possible to prevent the abutment screw removing drill 100 from deviating from its position in the drilling process.

Meanwhile, the guide connector 200 may have a guide window 230 formed on at least one side surface thereof. 8 (A) shows a side surface on which the guide window 230 is not formed, and FIG. 8 (B) shows a front surface on which the guide window 230 is formed and the opposite side is seen. Preferably, the guide window 230 has a configuration in which the inside of the guide window 230 can be grasped visually in both directions through the side surfaces of the guide connector 200 in a lateral direction.

As the guide window 230 is provided, various procedures performed through the guide connector 200 can be effectively grasped. That is, the position of the abutment screw removing drill 100 positioned in the guide connector 200 and the position of the extraction tab 300, which will be described later, can be easily grasped through the guide window 230. At this time, according to one embodiment, the predetermined mark 136 may be provided on the side of the abutment screw removing drill 100, and in this case, the position can be more easily grasped. For example, the mark 136 may be a predetermined mark, irregularity, color, or the like formed on the side surface of the abutment screw removing drill 100, but is not limited thereto. For example, positioning the abutment screw removal drill 100 in the guide connector 200, positioning the abutment screw removal drill 100 on the abutment screw M for removal, The step of removing the buttress screw removal drill 100 can be easily grasped through the guide window 230. [

In addition, it is advantageous to always discharge chips generated when the abutment screw (M) is drilled through the guide window (230), thereby improving the cutting power and durability of the abutment screw removing drill (100).

The abutment screw removing drill 100 and the extraction tab 300 to be described later are inserted through the guide connector 200 and the operation is performed through the guide window 230 according to the embodiment, It can be grasped visually and accurate and convenient procedure can be done. In particular, when the guide window 230 is placed in the direction shown by the operator, easier procedures can be performed.

Preferably, the apparatus for removing abutment screws according to the present invention further comprises an extraction tab 300, wherein the extraction tab 300 is formed in a perforation formed by the abutment screw removing drill 100 Is inserted and fastened to the abutment screw (M), and the extraction tab (300) is configured to rotate in a state where the abutment screw (M) is fastened to remove the abutment screw (M).

The extraction tab 300 is a member that substantially performs the removal of the abutment screw M and is coupled to the abutment screw M drilled by the abutment screw removing drill 100, Is used to remove the engagement screw (M). Meanwhile, at this time, the guide connector 200 may be used in connection with the extraction tab 300 and in the process of removing the abutment screw M.

Referring to FIG. 9, the extraction tab 300 is formed as an elongated beam, and has an engagement portion 310 at one end thereof to be fastened to the abutment screw M, which is perforated as described above. The coupling portion 310 may have a structure in which a hook is formed in a sharp tip or a protrusion is formed on an outer surface of the tip. Accordingly, the coupling portion 310 of the extraction tab 300 is coupled to the perforated portion of the abutment screw M, and can be removed by operating the abutment screw M.

Preferably, the extraction tab 300 and the abutment screw M are screwed together, and the direction of screwing between the extraction tab 300 and the abutment screw M is the same as that of the abutment screw M, The screw fastening directions between the fixture M and the fixture N may be configured to be opposite to each other.

That is, the coupling portion 310 of the extraction tab 300 has a screw structure in which the coupling portion 312 is formed on the predetermined tip as described above, and can be screwed with the abutment screw M. As a result of this screwing, the engagement between the abutment screw M and the extraction tab 300 can be firmly established.

The direction of screw engagement between the extraction tab 300 and the abutment screw M may be opposite to that between the abutment screw M and the fixture N. [ That is, when screw fixing between the fixture N and the abutment screw M is performed by rotating the abutment screw M clockwise, the extraction tab 300 and the abutment screw (M) can be accomplished by rotating in the counterclockwise direction.

This will be described in detail as follows.

The coupling portion 310 of the extraction tab 300 is inserted through the guide connector 200 so as to be placed on the upper surface of the abutment screw M as shown in FIG. At this time, the position of the extraction tab 300 can be easily grasped through the guide window 230 provided in the guide connector 200 as described above.

When the extraction tab 300 is fastened to the abutment screw M, the extraction tab 300 is rotated in the counterclockwise direction as shown by the arrow A, And the coupling between the extraction tab 300 and the abutment screw M is performed. At this time, the fastening direction of the abutment screw M with respect to the fixture N is the same as the direction of the arrow D, and the directions of the arrow A and the arrow D are opposite as described above. Accordingly, the abutment screw M is disengaged and raised as shown by the arrow C.

When the extraction tab 300 is rotated in the counterclockwise direction as shown by the arrow A in a state where the engagement between the abutment screw M and the extraction tab 300 is performed, The abutment screw M is removed from the fixture N as the abutment screw M is removed as shown by the arrow C because the abutment screw M receives a counterclockwise rotational force in a state that the abutment screw 300 is connected. 11 shows that the abutment screw M is connected to the coupling part 310 of the extraction tab 300 and is removed along with the rising of the extraction tab 300. [

Thereby, the coupling between the extraction tab 300 and the abutment screw M is performed without displacing or releasing the fixture N, and the abutment screw M is easily removed from the fixture N Can be removed. On the other hand, in the above-mentioned example, as an example, when the screwing between the extraction tab 300 and the abutment screw M is made in the clockwise direction and the screw connection between the abutment screw M and the fixture N It is also possible to arrange it in the counterclockwise direction.

Preferably, the apparatus for removing abutment screws according to the present invention further comprises a driving device for providing rotational force to the abutment screw removing drill 100, wherein the driving device includes a driving shaft connecting part 130, To provide a rotation to the abutment screw removal drill (100).

The driving device is, for example, a rotation driving device having a predetermined motor, and is connected to the abutment screw removing drill 100 to provide rotational force to the abutment screw removing drill 100. The abutment screw removing drill 100 is connected to the driving unit through the driving shaft connecting unit 130 and receives a rotating force. The driving device provides a rotational force to the abutment screw removing drill 100, and the rotational direction thereof can be controlled clockwise or counterclockwise. In addition, the driving device may be connected to the extraction tab 300 in addition to the abutment screw removing drill 100 and may be configured to apply a rotational force to the extraction tab 300 to remove the extraction tab 300 and the abutment So that the screw M can be fastened. At this time, as described above, the fastening between the extraction tab 300 and the abutment screw M and the removal of the abutment screw M are performed by the fixture N and the abutment screw M, For example, when the fixture N and the abutment screw M are fastened by the clockwise rotation, the driving device moves the extraction tab 300 and the sub- It is possible to provide a counterclockwise rotation about the buttment screw M.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

10: Fixtures
20: abutment screw
30: Abortment
40: prostheses
100: abutment screw removal drill
110:
112: protrusion
114:
130:
132: connection means
134: Home
136: Mark
200: Guide connector
210: Guide hole
220: Support
230: Guide window
240: grip portion
300: Extract tab
310:
312:

Claims (16)

An abutment screw removing drill which is placed on the upper end of the abutment screw and punctures the upper surface of the abutment screw so as to remove the abutment screw screwed to the fixture fixture from the fixture,
A drive shaft connecting portion connected to a predetermined power unit;
And a cutting part connected to the driving shaft connecting part and contacting the abutment screw to perform the punching of the abutment screw,
Wherein the cutting portion includes a material having a hardness higher than that of the drive shaft connecting portion,
The rotation direction of the abutment screw removing drill is,
Wherein the abutment screw is in a direction opposite to a direction of rotation in which the fixture screw is screwed to the fixture. The method according to claim 1,
The cutting portion
An abutment screw removal drill that includes a carbide material (material or tool made of an alloy of super hard material). The method according to claim 1,
The cutting portion
The cutting unit may include an abutment screw removing drill including a high speed steel (HSS) The method according to claim 1,
The cutting portion
And a coating layer coated on the outer surface,
Wherein the coating layer comprises:
TiN, AlTiN, and WCC. The method according to claim 1,
Wherein the cutting portion and the drive shaft connecting portion are press-
Wherein one of the cutting portion and the drive shaft connecting portion has a recessed groove and the other has a protrusion that is press-fitted into the groove. The method according to claim 1,
Wherein the cutting portion and the drive shaft coupling portion are welded or joined together by heat shrinkage. The method according to claim 1,
And the cutting portion is rotated together with rotation of the drive shaft connecting portion,
Wherein the groove and the protrusion include:
The abutment screw removing drill has a noncircular shape or has a cross section in which a predetermined engaging portion is formed in a circular cross section. The method according to claim 1,
The cutting portion
And a plurality of cutting blade portions contacting the abutment screw on the front side. 9. The method of claim 8,
The cutting blade portion
An abutment screw removal drill that is symmetrical or asymmetric about the central axis. 10. The method of claim 9,
The cutting blade portion
An abutment screw removal drill having a cutting edge for performing drilling in a direction of counterclockwise rotation. An abutment screw removing apparatus for removing an abutment screw screwed to a fixture for an implant from the fixture,
An abutment screw removing drill placed on an upper end of the abutment screw to puncture an upper surface of the abutment screw;
And a guide connector for guiding the drill so that the abutment screw removing drill is erected on an upper portion of the abutment screw,
The abutment screw removing drill includes:
A drive shaft connecting portion connected to a predetermined power unit;
And a cutting portion connected to the drive shaft connecting portion and contacting the abutment screw to perform the punching of the abutment screw,
Wherein the drive shaft connecting portion and the cutting portion include materials having different hardness from each other,
The rotation direction of the abutment screw removing drill is,
The abutment screw is rotated in a direction opposite to a rotation direction in which the abutment screw is screwed to the fixture,
The guide connector includes:
And a guide hole coupled to the fixture to guide the abutment screw removing drill through the guide hole. 12. The method of claim 11,
The guide connector includes:
And a guide window through which at least one side is perforated so that the interior is visually captured. 12. The method of claim 11,
Further comprising:
The extraction tab
A hole formed by the abutment screw removing drill is inserted into the hole and is fastened to the abutment screw,
Wherein the extraction tab rotates while the abutment screw is fastened to remove the abutment screw. 14. The method of claim 13,
Wherein the extraction tab and the abutment screw are coupled to each other,
Wherein the direction of engagement between the extraction tab and the abutment screw,
Wherein the abutment screw is fastened in a direction opposite to a screw tightening direction between the abutment screw and the fixture. 15. The method of claim 14,
And the direction of screw engagement between the extraction tab and the abutment screw,
An abutment screw remover configured in a counterclockwise direction. 14. The method of claim 13,
Wherein the extraction tab is provided with a latching portion.

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