JP5162604B2 - Implant fixture remover - Google Patents

Description

The present invention is a dental, plastic surgery, used in the case where a fixture that is screwed to a bone of a human body and fused with the bone must be removed due to failure of bone regeneration or loss of bone around the implant. With regard to medical fixture removers such as orthopedics, more specifically, the process of planting fixtures together with a simple and standardized procedure that allows fixtures to be separated and removed safely and quickly from human bones In addition, when the joint of the fixture is damaged due to excessive torque , and it is further screwed in or not removed, not only can the fixture be safely separated from the bone of the human body, but the safety of the operation can be improved, The present invention relates to an implant fixture remover that can significantly reduce the time required for treatment.

  In general, an implant refers to an artificial device made to replace or act as a tissue for an implant, insert or lost biological tissue.

  In order to replace the lost tooth root (root), an artificial dental root made of an alloy such as titanium that does not reject the human body is implanted into the alveolar bone from which the tooth has come out, and the dental implant is fused. After the treatment, the artificial tooth is fixed and the original function of the tooth is restored. That is, the dental implant refers to the lost natural tooth substitute itself, or a screw-shaped fixture is fastened to the alveolar bone to fuse with the bone for approximately 3 to 8 months. After that, a prosthesis such as an abutment portion (Abutment) and an artificial tooth crown (Crown) which are joint portions is fixed thereon, thereby restoring the original function of the tooth.

  Considering the operation of such an implant, it is greatly divided into soft incision and detachment surgery, bone removal surgery, implant placement surgery, and completion of the upper prosthesis. Apart from that, soft incision and detachment surgery is not much different from the principle of general surgery. Here, bone removal surgery is a process of largely removing cortical bone and removing cancellous bone. The basic principle is that the surrounding bone to be planted is ground and the cortical bone is displayed after displaying the planting site. A hole is made into a small hole, gradually expanded, and expanded to a size slightly smaller than the diameter of the implant to be planted, and then the implant is planted.

On the other hand, in the process of planting the fixture, the joint portion of the fixture may be damaged by excessive torque , and it may be further twisted or untwisted. Even with a bone-fused fixture, over time, inflammation is induced around the implant, causing loss of bone around the implant, thereby removing or separating the fixture if it cannot be retained further In order to twist the implant having bone adhesion, a removing torque of 100 to 500 Ncm is required, but conventionally there is a mechanism that can be removed by applying such torque. Since there was no such thing, the bone around the fixture was damaged extensively, and then the fixture was separated and removed.

  However, if the fixture is removed by removing the surrounding bone in this way, the fixture cannot be replanted due to the extensive loss of the surrounding bone, or because of the reconstruction of the damaged surrounding bone, Furthermore, there is a problem that the treatment period is not only increased and complicated, and the inconvenience is added to the patient, but also the treatment period is extended.

The present invention was created to solve the above-described problems of the prior art, and the object of the present invention is simple and standardized while minimizing bone removal and damage around the fixture. A powerful removal torque of up to 1,000 Ncm can be applied to damaged implants that are bone-bonded so that fixtures can be quickly removed by treatment, ensuring convenience and safety in use. It is to provide an implant fixture remover that can be provided.
In addition, another object of the present invention is to remove the surrounding alveolar bone when the fixture connecting part is damaged by excessive torque during the process of planting the fixture, and is further twisted or cannot be removed. An object of the present invention is to provide an implant fixture remover that can not only safely remove fixtures and increase the safety of the procedure, but also significantly reduce the time required for the procedure.

In order to achieve the above object, an implant fixture remover according to a preferred embodiment of the present invention includes a coupling screw portion screwed to a female screw portion of the fixture, and one side of the coupling screw portion to the outside of the fixture. A separation screw portion formed on the outer peripheral surface and having another spiral machined thereon, and a remover screw; and the inner screw surface is inserted into the separation screw portion of the remover screw and fastened with a screw. A separation female screw portion in which a spiral corresponding to the separation screw portion is formed, and a close contact portion formed in a lower step portion of the separation female screw portion and in frictional contact with an outer surface of the upper portion of the fixture; And a remover driver that includes a shank portion that extends from the upper portion to the upper portion and is connected to the outer peripheral surface of one end of the fastening tool. To do.

One desirable characteristic of the present invention is that a fastening torque between the remover screw and the fixture is 15 Ncm to 100 Ncm, and a removing torque between the remover screw and the remover driver is 60 Ncm to 1000 Ncm.

  As another desirable feature of the present invention, the screw direction of the coupling screw portion coincides with the direction of the female screw portion of the fixture, and the screw direction of the separation screw portion is a spiral formed on the outer surface of the fixture. The direction is opposite to the direction.

  As another desirable feature of the present invention, the spiral direction of the coupling screw portion coincides with the female screw direction of the fixture, and the screw direction of the separation screw portion is opposite to the screw direction of the coupling screw portion. There is.

  As another desirable feature of the present invention, a spiral direction of the coupling screw portion coincides with a female screw direction of the fixture, and a screw direction of the separation screw portion coincides with a screw direction of the coupling screw portion. is there. In this case, the direction of the internal thread of the fixture and the direction of the outer surface spiral of the fixture are opposite to each other. In this case, the direction of the separation screw portion is always opposite to the external spiral of the fixture. Such a case occurs because it has to be. Further, in the case of a cylinder-type fixture having no threads on the outside of the fixture, the direction of the separation screw portion may be any direction.

  The separation screw part is ideally a single or double thread, but may be a three or four thread for fast fastening or strong fastening, and the thread form is triangular. Four corners are ideal, but trapezoidal, tooth-shaped, round-shaped screws may be applied.

  As another desirable feature of the present invention, a polygonal groove or protrusion is formed on the upper part of the separation screw portion of the remover screw so that a screwdriver can be connected so that the screw can be fastened to the fixture at 100 Ncm or less. It may be formed.

  As another desirable feature of the present invention, the contact portion is formed of two or more protruding protrusions, two or more grooves, or a gear shape.

  In another desirable feature of the present invention, the contact portion is provided in a shape corresponding to the upper outer shape of the fixture so as to be in close contact with the upper end portion of the fixture or the upper outer surface of the fixture. Yes.

  As another desirable feature of the present invention, the inner surface of the contact portion may be provided in an inclined shape so as to spread outward toward the terminal portion, and diamond, metal, ore powder is selectively coated on the surface. Or the formation of irregularities.

As a further desirable feature of the present invention, the shank portion has a configuration corresponding to the connecting structure of the torque ratchet so as to connect the hand torque ratchet so that a large removing torque can be applied to the remover. is there. That is, the torque ratchet is not may be used a known torque wrench, the shank portion of the case, due to the engagement of the torque wrench, may be processed into a bolt shape.

  The features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. Prior to this, the terms and words used in this specification and claims should not be parsed in the usual and lexical sense, but the inventor explains his own invention in the best way possible. Therefore, it should be construed as a meaning and concept consistent with the technical idea of the present invention based on the principle that the term concept can be appropriately defined.

  The implant fixture remover according to the present invention minimizes the damage to the alveolar bone through a simple and standardized operation, and removes the useless fixture that has been damaged, cracked, or destroyed the surrounding bone tissue. Therefore, it is possible to prevent side effects of the treatment due to an increase in the site where the alveolar bone is removed, and not only increase the safety of the treatment but also significantly reduce the time required for the treatment.

  In addition, immediately after removal of the fixture, a new implant having the same diameter can be immediately planted, and a beneficial effect can be expected in that the fractured bone tissue can be regenerated on the upper part of the fixture.

  In addition, the present invention has been illustrated as being applied to the dental field. However, the present invention can also be easily applied to the fields of orthopedics and plastic surgery, such as spinal implants.

It is sectional drawing which showed the use condition of the implant fixture remover which concerns on this invention. FIG. 2 is a cross-sectional view showing a state where the implant fixture remover of FIG. 1 is separated. It is the perspective view which showed the remover screw in the implant fixture remover which concerns on this invention. It is the perspective view which showed one Embodiment of the remover driver in the implant fixture remover which concerns on this invention. FIG. 6 is a perspective view showing another embodiment of a remover driver in the implant fixture remover according to the present invention.

  Hereinafter, an implant fixture remover according to the present invention will be described with reference to the accompanying drawings. First, it should be noted that the same components or parts in the drawings are denoted by the same reference numerals as much as possible. In describing the present invention, specific descriptions of known related functions or configurations are omitted to avoid obscuring the gist of the present invention.

  FIG. 1 is a cross-sectional view showing a use state of an implant fixture remover according to the present invention, and FIG. 2 is a cross-sectional view showing a separated state of the implant fixture remover of FIG. FIG. 3 is a perspective view showing a remover screw in the implant fixture remover according to the present invention. FIG. 4 is a perspective view showing an embodiment of a remover driver in the implant fixture remover according to the present invention. is there.

  First, the fixture (f) separated and removed by the implant fixture remover of the present invention will be briefly described.

  The fixture (f) is inserted into the alveolar bone and fuses with the bone. In this case, the fixture (f) is formed on the outer peripheral surface so as to be screwed to the dense bone and the cancellous bone. The right spiral is mainly formed, and in some rare cases, the left spiral is formed. The fixture (f) is formed with a groove having a certain depth while the upper surface is open so that an artificial dental crown (not shown) can be screwed onto the fixture (f). A female screw part (fs) is formed on the peripheral surface by forming a spiral.

  In this case, the spiral formed on the outer peripheral surface of the fixture (f) and the spiral formed on the female screw portion (fs) have the same direction. Since such a fixture (f) is implemented by a known technique, a detailed description thereof will be omitted.

In the present invention, while the fixture (f) described above is simplified, a spiral that is fastened to the fixture (f) is formed at one end so that the fixture (f) can be separated and removed from the oral cavity by a standardized surgical operation. The other end is formed with a remover screw 10 in which another spiral is formed, and a separation female screw part 22 with one end screwed to the remover screw 10, and the other end is a socket of a torque ratchet (wrench) or It comprises a remover driver 20 having a shank portion 21 in which a tool such as a screwdriver is bound.

  The remover screw 10 takes the form of a double screw having a predetermined length, and one end is formed with a coupling screw portion 11 that is screwed to the female screw portion (fs) of the fixture (f). At the other end, a spiral in the opposite direction to the coupling screw portion 11 is processed to form a separation screw portion 12 that is screwed to a separation female screw portion 22 of a remover driver 20 described later. That is, in the remover screw 10 according to the present invention, when the screw directions of the coupling screw portion 11 and the separation screw portion 12 are opposite to each other, that is, when the coupling screw portion 11 is a right-hand thread, the separation screw portion 12 is When formed as a screw and the coupling screw portion 11 is a left-hand screw, it is desirable that the separation screw portion 12 satisfy a right-hand screw.

  On the other hand, in the present invention, the screw directions of the coupling screw portion 11, the fixture (f), and the separation screw portion 22 may be configured by various combinations.

  As an example, the screw direction of the coupling screw portion 11 coincides with the direction of the female screw portion (fs) of the fixture (f), and the screw direction of the separation screw portion 22 is formed on the outer surface of the fixture (f). It may be formed in a direction opposite to the direction of the spiral.

  As another example, the spiral direction of the coupling screw portion 11 may coincide with the female screw direction of the fixture (f), and the screw direction of the separation screw portion 22 may be formed in a direction opposite to the screw direction of the coupling screw portion 11. .

  As yet another example, the spiral direction of the coupling screw portion 11 is formed to match the female screw direction of the fixture (f), and the screw direction of the separation screw portion 22 is formed to match the screw direction of the coupling screw portion 11. Can be done.

  On the other hand, in the example of the present invention, it has been proposed that the remover screw 10 is provided such that the coupling screw portion 11 has a diameter that is smaller than that of the separation screw portion 12, but the present invention is not limited thereto. The separation screw portion 12 may be provided to have the same diameter, or the separation screw portion 12 may have a reduced diameter compared to the coupling screw portion 11.

  Further, according to the present invention, the screw pitch of the coupling screw portion 11 is the same as the screw pitch of the screw hole inside the fixture to be removed, and the screw pitch of the separation screw portion 12 and the number or shape of the threads are designed. Since various modifications can be made on the above, there is no limitation.

The remover driver 20 has a separation screw portion 12 of the remover screw 10 inserted therein and is fastened with a screw. The removal screwdriver 20 has a groove shape that opens downward, and a separation female screw portion 22 having a spiral formed on the inner peripheral surface. The shank portion 21 extends to one side of the separated female screw portion 22 and is bound with a torque ratchet (wrench) socket. The shank portion in this case can be provided in the form of a bolt so as to have a bundling structure with a known torque ratchet, or can be completed by forming a screw groove so that a screwdriver can be fastened. Since the connecting structure of such a fastening tool may be implemented by a known technique, a detailed description is omitted.

  On the other hand, the remover driver 20 is formed with a separation female screw portion 22 to which the separation screw portion 12 is screwed by forming a spiral on the inner peripheral surface while the lower surface is open, and the separation female screw portion 22 in this case is formed. Has a spiral shape corresponding to the separation screw portion 12.

  In such a configuration, when the remover driver 20 is turned by a ratchet in the direction of removing the fixture f, the remover driver 20 is lowered toward the fixture f along the direction of the separation screw portion 22, and the upper portion of the fixture f is It is a principle that the fixture f and the remover driver 20 are integrated with each other while being in close contact with each other, and are separated from the alveolar bone and come out.

Further, the separation female screw portion 22 has a shank portion 21 formed on one side thereof. In this case, the shank portion 21 is a portion to which a tool such as a ratchet wrench is fastened. The tool used in this case is a screwdriver. etc. and passive torque wrench, having a form of screw fastening and the release tool is connected. In this case, the torque wrench, may be used as the torque gauge built. Since such a tool is implemented by a well-known technique, detailed description is abbreviate | omitted.

  FIG. 5 is a perspective view showing another embodiment of the remover driver in the implant fixture remover according to the present invention. As shown in this plane, the remover driver 20 of the present invention can be firmly frictionally contacted with the outer surface of the upper portion of the fixture (f) in the state where the remover driver 20 is completely fastened to the separation screw portion 12. Further, a close contact portion 23 is formed at the edge of the terminal end portion of the separation screw portion 12.

  As shown in the drawing, the contact portion 23 in the present embodiment is provided in a form in which friction protrusions 23a are formed to protrude from the end surface of the fixture f at equal intervals. On the other hand, the frictional protrusion 23 can be seen from the figure so that when the remover driver 20 is turned in the direction of twisting the fixture f, the frictional force acts in the direction in which the frictional protrusion 23 comes into close contact with the upper part of the fixture f. Thus, it is desirable to be provided in a tooth profile with directionality.

  On the other hand, in the present invention, a metal powder or diamond powder that is lightly excellent is applied to the friction projection 23a so that the frictional force of the adhesion portion 23 can be increased in addition to simply forming the adhesion portion 23 by protruding the friction projection 23a. Bonding to form a coating layer, or roughening the surface of the contact portion 23, resulting in an increase in the frictional force of the contact portion 23 and easy removal of the fixture (f) through the remover driver 20 Should be able to do. On the other hand, a method of forming a coating layer with a metal or diamond powder on the surface of the friction projection 23a or roughening the surface may be carried out by a known technique, and detailed description thereof will be omitted.

  In addition to the friction protrusions 23a, two or more grooves are formed in the contact portion 23, or in a cone shape or a gear shape that spreads downward so as to make maximum contact with the outer surface of the upper portion of the fixture. It may be provided.

The fastening torque between the remover screw 10 and the fixture f is preferably 15 Ncm to 60 Ncm, and the fastening torque between the remover screw 10 and the remover driver 20 is preferably 60 Ncm to 1000 Ncm.

This is because when the fastening torque between the remover screw 10 and the fixture (f) is less than 15 Ncm, no force is applied to the remover driver 20 when the fixture is removed, and the remover screw 10 is removed from the fixture (f). This is because when the present situation that can be solved occurs and is 61 Ncm or more, deformation and cracking of the remover screw 10 occur.

Further, when the fastening torque between the remover screw 10 and the remover driver 20 is less than 60 Ncm, the remover driver 20 does not operate, and when it exceeds 1000 Ncm, the remover driver 20 is deformed, and the remover screw 10 is deformed. The crack present situation arises.

  The treatment process of the implant fixture remover of the present invention configured as described above will be described as follows.

  First, in order to remove the fixture f implanted in the alveolar bone, a prosthesis such as an abutment unit coupled to the fixture f and an artificial dental crown is removed.

Next, the coupling screw portion 11 of the remover screw 10 is screwed within the recommended torque to the female screw portion (fs) of the fixture f, and the separation female screw portion 22 of the remover driver 20 is screwed to the separation screw portion 12 of the remover screw 10. .

Then, turning slowly shank portion 21 of the remover driver 20 in the direction of removing the fixture f through ratcheting tool such as a torque wrench, a remover driver 20 and the fixture f is in close contact with the integrated, without idling, fixture As f rotates together in the direction in which f is removed from the alveolar bone, the fixture f can be separated and removed as a result.

In this case, the removing torque can be applied from 100 Ncm to 1000 Ncm depending on the type and size of the fixture. In order to reduce heat generation, sufficient water must be supplied around the fixture.

  On the other hand, the present invention is not limited to the described embodiments, can be used by changing the application site, and can be variously modified and modified without departing from the spirit and scope of the present invention. Is obvious to those with ordinary knowledge in the art. Accordingly, such variations and modifications should fall within the scope of the claims of the present invention.

DESCRIPTION OF SYMBOLS 10 Remover screw 11 Coupling screw part 12 Separation screw part 20 Remover driver 21 Shank part 22 Separation female screw part 23 Contact part f Fixture fs Female thread part

Claims (15)

In the remover to remove the implant fixture from the living bone,
A coupling screw portion (11) that is screwed to the female thread portion (fs) of the fixture (f) and an extension of the coupling screw portion (11) to the outside of the fixture. A separation screw portion (12) in which another spiral is machined, and a remover screw (10) comprising:
A separation screw (12 ) of the remover screw (10) is inserted and fastened; a separation female screw (22) having a spiral corresponding to the separation screw (12) formed on the inner peripheral surface; A close contact portion (23) formed at a lower step portion of the separation female screw portion (22) and in frictional contact with an upper outer surface of the fixture (f);
A remover driver (20) having a shank portion (21) extending upward from the separated female thread portion (22) and connected to a fastening tool on an outer peripheral surface of one end;
An implant fixture remover characterized by comprising: It fastening torque of the remover screw (10) and the fixture (f) is 15Ncm～100Ncm, re moving torque of the remover screw (10) and remover driver (20) is a 60Ncm~1000Ncm The implant fixture remover according to claim 1. The screw direction of the coupling screw portion (11) coincides with the screw direction of the female screw portion (fs) of the fixture (f), and the screw direction of the separation screw portion (22) is the same as that of the fixture (f). The implant fixture remover according to claim 1, wherein the implant fixture remover is in a direction opposite to a direction of a spiral formed on the outer surface. The helical direction of the coupling screw portion (11) coincides with the female screw direction of the fixture (f), and the screw direction of the separation screw portion (22) is opposite to the screw direction of the coupling screw portion (11). The implant fixture remover according to claim 1, wherein: The spiral direction of the coupling screw portion (11) coincides with the female screw direction of the fixture (f), and the screw direction of the separation screw portion (22) coincides with the screw direction of the coupling screw portion (11). The implant fixture remover according to claim 1. The implant fixture remover according to claim 1, wherein the separation screw part (22) is a 1 to 4 thread. The thread pattern of the separating thread (22) is triangular, quadrangular, trapezoidal, tooth, implant fixture remover according to claim 1, characterized in that the round shape of the screw. The implant fixture remover according to claim 1, wherein a structure in which a screw driver as a fastening tool is connected is formed on an upper portion of the separation screw portion of the remover screw (10) . The implant fixture remover according to claim 1, wherein the contact portion (23) includes two or more friction protrusions (23a) formed to protrude. The implant fixture remover according to claim 1, wherein the close contact portion (23) is formed with two or more grooves. The implant fixture remover according to claim 1, wherein the contact portion (23) has a gear shape. The said contact part (23) is provided with the shape corresponding to the external shape of the upper part of the said fixture so that it may closely_contact | adhere to the upper end part of the said fixture, or the outer surface of the upper part of a fixture. Implant fixture remover as described in 1. The implant fixture remover according to claim 1, wherein an inner surface of the contact portion (23) has a shape inclined so as to spread outward toward the terminal portion.   2. The implant fixture remover according to claim 1, wherein a surface of the contact portion is formed by coating with diamond, metal, ore powder, or unevenness is formed. The said shank part (21) consists of a form corresponding to the connection structure of a torque ratchet so that a hand torque ratchet may be connected so that a big removing torque can be given to a remover. The described implant fixture remover.

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