KR20200048151A - Implant that fixes between fractured bones - Google Patents

Abstract

The present invention relates to an implant positioned between fractured bones to fix a part between the fractured bones. The implant includes: an external housing including a flexible part formed on a circumference of a front end portion thereof and having a spiral shape to apply flexibility and at least one screw hole formed in a circumference of a rear end portion thereof, and having the shape of a cylindrical rod, a rotation member rotating about a central axis by an external rotation mechanism, a fixing member moving in a longitudinal direction due to rotation of the rotation member and protruding out of the external housing to be fixed to the bone, and a motion switching ember interposed between the rotation member and the fixing ember, coupled to the rotation member, and fixed with the fixing member.

Description

IMPLANT THAT FIXES BETWEEN FRACTURED BONES

The present invention relates to a fractured bone and an implant that is positioned between the bone and fixed between the fractured bones, and more particularly, supports fractured bones in a form inserted inside the bones in the bone marrow cavity, particularly applied during clavicle fractures. It relates to an implant suitable for the following.

Fractures are a common condition and are likely to occur on physical stimuli such as external shocks or falls. Osteoporosis, a skeletal disease that is easily fractured due to weak bone strength and progressive loss of articular cartilage in joints and secondary changes and symptoms associated with it It can also be caused by osteoarthritis, which can often cause pain or disability.

One of the current treatments for such fractures includes surgical fracture of the fracture. After surgical treatment, the fracture area of the body (that is, the area where the fracture bone is located) is often fixed to external gibbes over a long period of time to ensure that the fracture is properly healed. It can take months to remove Gibbs and resume normal activity.

Moreover, when a fracture occurs at a location where the gibbs outside the arm or leg are difficult to apply, or when a complex type of fracture such as a composite fracture occurs, appropriate means for maintaining the fractured bone in place In some cases, it has to be provided surgically.

As a means for treating such fractures, various fracture plates in the form of an internal fixation splint are used as an implant in the body, and a normal fracture plate is provided with a screw or the like on the outer surface of the bone, that is, a cortical bone (or dense bone) having a high density. It has a fixed structure.

In a different concept, in order to align and stabilize the fracture by case, a rod or nail type implant in the bone marrow may be used.

In particular, in the case of a clavicle, etc., whose bone surface contour is exposed through the skin adjacent to the skin, when a fracture plate with a certain thickness or more is fixed with a screw on the outer surface of the cortical bone, it is not only good in appearance but also technical problems of surgery There is a case in which a fracture treatment implant needs to be fixed on the medial side, not on the outside of the bone.

That is, in this case, a metal rod-shaped implant is installed inside the inner cancellous bone tube of the bone and fixed at a predetermined position, generally at both ends.

Implants of this kind, commonly referred to as nails, can be removed after the fractured part of the bone has been healed or left in place.

Conventional nail treatment sometimes requires long-term incorporation of nails when long metal nails installed across large openings and fractures are not removed.

However, pain or necrosis of the bone may occur or an infection may occur due to the minute movement between the bone and the nail.

Korean Registered Patent Publication No. 1074446

An object of the present invention is to provide an implant that fixes between fractured bones and fractured bones that fix fractured bones so that the bones can stick together.

Another object of the present invention is to provide an implant for fixing between fractured bones having a structure capable of facilitating removal surgery by easily removing the fixation member of the implant that was fixed to the bone after the fractured bones adhered to each other. will be.

In particular, another object of the present invention is to provide an implant for fixing between fracture bones that are removed in the longitudinal direction without folding or rotating the fixing member of the implant.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description. Will be able to.

The implant for fixing between the fractured bones of the present invention for achieving the above-mentioned subject forms a spiral-shaped flexible portion for providing flexibility around the tip portion, and the rear end portion has a cylindrical shape in which at least one screw hole is formed. A rod-shaped outer housing; A rotating member rotated about a central axis by an external rotating mechanism; A fixing member that is moved in the longitudinal direction by rotation of the rotating member and protrudes to the outside of the outer housing and is fixed to the bone; And a movement switching member positioned between the rotating member and the fixed member, coupled to the rotating member and fixed to the fixed member, wherein the front end portion of the outer housing has an entrance hole so that the fixed member protrudes to the outside. It is characterized by being formed.

Specifically, the fixing member is formed in the shape of an 'U', and the first tip portion and the second tip portion and the first tip portion and the second tip portion are extended and connected in the longitudinal direction so as to dig the bone tissue. It includes a connecting portion, the first tip portion and the second tip portion is characterized in that horizontally spaced apart.

In addition, the first tip portion and the second tip portion of the fixing member are characterized in that they protrude longer than the tip end portion of the outer housing in the maximum protruding state.

In addition, the fixing member is characterized in that it is fixed or separated from the bone by moving forward or backward according to the rotational direction of the rotating member.

In addition, the fixing member is characterized in that it protrudes to the outside while bending at an angle in the range of 10 ° to 20 ° based on the longitudinal direction.

In addition, the movement switching member is characterized in that the rotational movement of the rotating member does not affect the fixing member, and the moving member is switched to a linear motion.

In addition, the rotating member forms a screw-shaped screw portion on the outer periphery, the rear end portion is a connecting portion to which an external rotating mechanism is connected, and the front end portion is characterized in that the coupling portion to which the motion switching member is coupled is formed.

In addition, by forming a screw shape corresponding to the screw shape formed on the rotating member on any part of the inner periphery of the outer housing, the rotating member is rotated by the external rotating mechanism to move in the longitudinal direction of the outer housing It is characterized by.

As explained above,

The present invention has an effect of preventing the implant itself from being rotated or deviated from the insertion position after being inserted inside the bone to fix the fractured bone.

In addition, the present invention has an effect that it is easy to remove the implant by allowing the fixing member to be easily returned to its original position even when biological tissue is inserted into the bone to prevent rotation and detachment and is fixed around the fixed member.

Accordingly, it is easy to remove the implant and has an effect of reducing infections and complications that may occur secondarily.

1 is a view showing an implant for fixing between fracture bones according to an embodiment of the present invention, a view of the medial structure is seen.
2 is a view showing a state in which an implant is used to fix a fracture between bones according to an embodiment of the present invention.
3 is a view showing the outer housing of the implant to fix the fracture between bones according to an embodiment of the present invention.
Figure 4 is a view showing a cross-section of the tip of the outer housing of the implant to fix the fracture between bones according to an embodiment of the present invention.
5 is a view showing the internal configuration of the implant to fix the fracture between bones according to an embodiment of the present invention.
6 is a view showing a rotating member of the implant to fix the fracture between bones according to an embodiment of the present invention.
7 is a view showing a fixing member of an implant for fixing between fracture bones according to an embodiment of the present invention.
8 is a view showing the movement switching member of the implant to fix the fracture between bones according to an embodiment of the present invention.
9 is a cross-sectional view showing a state before (a) and after use (b) of an implant for fixing between fracture bones according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

In addition, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description, and terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator And definitions of these terms should be made based on the contents throughout this specification.

The present invention relates to an implant that fixes between the fractured bones. In practice, there will be separate devices required in the process of inserting the implant into the bone, but to describe mainly the implant that fixes between the fractured bones corresponding to the subject matter of the present invention. do.

1 to 8 is a view showing an implant for fixing between fracture bones according to an embodiment of the present invention, the implant 1000 is an outer housing 100, the rotating member 200, the fixing member 300, and movement It includes a switching member 400.

2 and 3, the outer housing 100 is formed in the shape of a hollow cylindrical rod in the longitudinal direction, and can be divided into a front end portion 110 and a rear end portion 120.

The circumference of the tip portion 110 is so that the flexible portion 111 with a spiral groove and the fixing member 300 located inside the outer housing can be projected to the outside in order to provide flexibility so that the shape can be modified according to the shape of the bone. The entrance hole 112 is formed.

At this time, the flexible portion 111 is formed through a spiral shape along the outer circumference of the outer housing 100. Here, the length of the flexible portion 111 is not limited. This does not specify the length of the flexible portion 111 since the maximum angle of the tip portion 110 can be adjusted according to the length of the flexible portion 111.

In addition, as shown in FIG. 4, the entrance hole 112 of the front end portion 110 is a standard in the longitudinal direction, and is formed at an angle of A in the outer direction, and A is formed at an angle in the range of 10 ° to 20 °. It is, guides the fixing member 300 in the longitudinal direction outside.

The circumference of the rear end portion 120 is formed with at least one screw hole 121. At this time, the screw hole 121 is to pass through a separate screw to fix the implant 1000 inserted between the bone 10 and the bone 10.

Here, a plurality of screw holes 121 is preferably formed according to the angle, which has the advantage that can be fixed to the bone 10 through the screw holes 121 formed even if the implant 1000 is inserted in any direction.

The end of the rear end 120 is a type of surgical tool, and is in a state of being penetrated into the inside without being blocked to control the internal configuration using a rotating mechanism that is drawn in from the outside.

In addition, a nut part (not shown) having a screw shape corresponding to the rotating member 200 is formed on any part of the inner periphery of the rear end portion 120.

The internal configuration is provided inside the outer housing 100, as shown in FIGS. 5 to 8, includes a rotating member 200, a fixed member 300, and a motion switching member 400, This is located in the order of the fixing member 300, the movement switching member 400, and the rotating member 200 based on the front end portion 110 of the outer housing 100, as shown in FIG. Detailed explanation.

6, the rotating member 200 is rotated relative to the central axis by an external rotating mechanism (not shown) and moved in the longitudinal direction, with a screw portion 210, a connecting portion 220, and a coupling portion It is formed of 230.

The screw part 210 is formed in the shape of a screw on the outer periphery of the rotating member 200, which corresponds to a nut part (not shown) formed inside the outer housing 100 and rotates in the longitudinal direction by being engaged in the outer housing 100. Moves.

The connecting part 220 is connected to an external rotating mechanism (not shown) that is drawn through the end of the rear end portion 120 of the outer housing 100.

At this time, in the embodiment of the present invention, the rotating mechanism was formed in the form of a polygonal accommodating portion so that the rotating member 200 can be controlled by the user's control with an external rotating mechanism, but the shape of the connecting portion 220 is formed. It is not limited to this, and is preferably formed to correspond to the end of the external rotating mechanism.

That is, the connection part 220 is a part that connects a mechanism capable of applying a force from the outside to rotate and move the screw part 210 engaged with the nut part of the external housing 100.

The coupling portion 230 is coupled to the movement switching member 400. At this time, the engaging portion 230 is preferably coupled to accommodate the engaging projection 410 of the movement switching member 400, even if the rotating member 200 is rotated by an external rotating mechanism connected to the connecting portion 220 The movement switching member 400 is coupled so as not to rotate.

This is fixed so that the rotating member 200 and the movement switching member 400 are fixed in order to convert the movement so that the fixing member 300 does not rotate like the rotating member 200 to linearly move to the fixing member 300 instead of the rotational movement. When the rotating member 200 is rotated without being combined, it is idle.

The fixing member 300 is formed in a 'U' shape as shown in FIG. 7, forming a first tip portion 310 and a second tip portion 320 to allow the bone 10 to penetrate the surface. , The first tip portion 310 and the second tip portion 320 are horizontally spaced apart, and the first tip portion 310 and the second tip portion 320 extend in the longitudinal direction to be connected to the connecting portion 330. Includes.

The fixing member 300 protrudes the first tip portion 310 and the second tip portion 320 to the outside through the access hole 112 of the outer housing 100, and thus the bone 1000 is inserted in the position where the implant 1000 is inserted ( 10).

When the first tip portion 310 and the second tip portion 320 protrude through the entrance hole 112 of the outer housing 100, it is moved according to the guide of the entrance hole 112, and the fixing member 300 Is bent outward at an angle in the range of 10 ° to 20 ° based on the longitudinal direction.

At this time, when the first tip portion 310 and the second tip portion 320 of the fixing member 300 bend less than 10 °, the fixing force fixed to the bone is reduced, and when it exceeds 20 °, the bone In accordance with the diameter of the bone to the wound more than necessary, or the first tip portion 310 and the second tip portion 320 for the removal of the outer housing 100 in the process of linear movement is not made into the inside It can become difficult to enter.

Accordingly, the first tip portion 310 and the second tip portion 320 have an angle in the range of 10 ㅀ to 20 ㅀ.

It is preferable that the first tip portion 310 and the second tip portion 320 of the fixing member 300 protrude in the longitudinal direction longer than the ends of the tip portion 110 of the outer housing 100.

This is because the tip portion 110 of the outer housing 100 is not sharp, and thus serves to fix the tip portion 110 of the implant 1000. If it does not protrude in the longitudinal direction, the fixing force fixed to the bone is not sufficiently exhibited.

That is, the implant 1000 according to the embodiment of the present invention is fixed by external screws penetrating the fixing member 300 and the screw hole 121 at the front end portion 110 and the rear end portion 120, respectively, and the bone 10 It is possible to prevent the implant 1000 inserted in the movement.

In addition, the fixing member 300 is not rotated according to the rotational direction of the rotating member 200, but is moved forward or backward in a linear motion, that is, in a sliding manner, and when moving forward, the first tip portion through the entrance hole 112 ( 310) and the second tip portion 320 is protruded and fixed to the bone, and the first tip portion 310 and the second tip portion 320, which were fixed to the bone when retracted, are drawn into the access hole 112 and the bone It is separated from.

As the fixing member 300 moves forward or backward in the longitudinal direction, new bone tissues newly formed between the external housing 100 and the fixing member 300 protruding through the access hole 112 are not generated as an obstacle. The fixing member 300 is easily fixed and separated.

For example, when an implant removal operation is performed after the fractured bone and the bone are later joined, the bone generated around the fixing member 300 is easily peeled off, and the fixing member 300 is introduced into the outer housing 100. By removing the implant 1000, there is an effect that the surgery for removing the implant 1000 is facilitated.

As shown in Figure 8, the movement switching member 400 is located between the rotating member 200 and the fixing member 300, the rotating member 200 and the moving switching member 400 are combined, and the fixing member ( 300) and the movement switching member 400 is fixed.

In more detail, the coupling protrusion 410 of the movement switching member 400 is fitted to the coupling portion 230 of the rotating member 200, and the connecting portion 330 of the fixing member 300 is connected to the movement switching member 400. It is fixed to the fixing portion 420.

As described above, the reason for the configuration is that when the rotating member 200 is rotated by an external rotating mechanism, it moves while rotating in the longitudinal direction, but the motion converting member 400 combined with the rotating member 200 rotates in vain. 400 is not to rotate, the rotating member 200 is to move only in the longitudinal direction while pushing or pulling.

At this time, the fixing member 300 fixed to the movement switching member 400 does not rotate like the movement switching member 400 but moves only in the longitudinal direction.

That is, the movement switching member 400 and the fixing member 300 are not rotated by the rotation of the rotating member 200, but only move in the longitudinal direction in which the rotating member 200 is moved.

 For this reason, when removing the first tip portion 310 and the second tip portion 320 of the fixing member fixed to the bone, it is easy to remove the bone without impact by not rotating.

9 is a cross-sectional view showing a state before (a) and after use (b) of the implant according to an embodiment of the present invention, before the use of the implant (a), the first tip portion 310 of the fixing member 300 And when the second tip portion 320 is maintained at a predetermined interval, and is inserted into the bone and fixed to the bone, the rotating member 200 at the rear end rotates in the forward direction as shown in (b) after use. The first tip portion 310 and the second tip portion 320 of the fixing member 300 that is moved in the longitudinal direction by pushing the 300 is projected to the outside of the outer housing 100.

At this time, the first tip portion 310 and the second tip portion 320 are fixed to the bone while protruding outward by an angle of the entrance hole 112 formed in the tip portion 110 of the outer housing 100. .

When the rotating member 200 rotates in the reverse direction, the first tip portion 310 and the second tip portion 320 protruding to the outside of the outer housing 100 rotate while the rotating member 200 reverses. The first switching unit 310 and the second cutting unit 320 are connected to the entrance hole (pulling the movement switching member 400) coupled to the movement switching member 400 while pulling the fixing member 300 fixed together. 112) is again introduced into the interior of the outer housing 100, and the implant 100 is returned to its original state as shown in (a) before use.

 Therefore, the present invention has an effect of preventing the implant itself from being rotated or disengaged after being inserted inside the bone to fix between the fractured bones.

In addition, the present invention has the effect that the fixing member is easily returned to the original position even if the newly formed bone around the fixing member fixed to the bone to prevent rotation and separation is easy to remove the implant.

Accordingly, there is an effect of reducing the infection and complications that may occur secondarily by the easy removal of the implant.

Although the embodiments according to the present invention have been described above, they are merely exemplary, and those skilled in the art will understand that various modifications and equivalent ranges of the embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined by the following claims.

10 ... bones
1000 ... implant
100 ... external housing
110 ... tip
111 ...
112 ... entrance hall
120 ... rear end
121 ... Screw hole
121a ... screw
200 ... Rotating member
210 ... Screw
220 ... connection
230 ... connection
300 ... Fixed member
310 ... 1st high tech
320 ... 2nd high-tech department
330 ... connection
400 ... exercise conversion member
410 ... Combination projection
420 ... Government

Claims (8)

Forming a helical flexible portion for imparting flexibility around the tip, and the outer circumference of the rear end is a cylindrical rod-shaped outer housing in which at least one screw hole is formed;
A rotating member rotated about a central axis by an external rotating mechanism;
A fixing member that is moved in the longitudinal direction by rotation of the rotating member and protrudes to the outside of the outer housing and is fixed to the bone; And
It is located between the rotating member and the fixed member, coupled to the rotating member and a motion conversion member fixed to the fixed member; includes,
Implant for fixing between fracture bones, characterized in that the front end of the outer housing is formed with an entrance hole so that the fixing member protrudes to the outside.
The method according to claim 1,
The fixing member is formed in an 'U' shape, and includes a first tip portion and a second tip portion and a connecting portion connected to the first tip portion and the second tip portion in the longitudinal direction so as to penetrate into the bone tissue. Ha,
The first tip portion and the second tip portion is an implant that is fixed between the fractured bone, characterized in that horizontally spaced apart.
The method according to claim 2,
The first tip portion and the second tip portion of the fixing member, the implant to fix between the fractured bone, characterized in that protrudes longer than the distal end of the outer housing in the maximum protruding state.
The method according to claim 1 or claim 2,
The fixing member is an implant for fixing between fractured bones, characterized in that it is fixed or separated from the bone by moving forward or backward according to the rotational direction of the rotating member.
The method according to claim 1,
The fixing member is an implant for fixing between fracture bones, characterized in that protruding to the outside while bending at an angle in the range of 10 ° to 20 ° based on the longitudinal direction.
The method according to claim 1,
The movement switching member is an implant for fixing between fractured bones, characterized in that the rotational movement of the rotating member does not affect the fixing member, and the movement state is changed so that the fixing member moves linearly.
The method according to claim 1,
The rotating member forms a screw-shaped screw portion on the outer periphery, the rear end portion becomes a connecting portion to which an external rotating mechanism is connected, and the front end portion fixes between the fractured bones, characterized in that a coupling portion to which the motion conversion member is coupled is formed. Implants.
The method according to claim 7,
A screw-shaped nut portion corresponding to the screw shape formed on the rotating member is formed on any part of the inner periphery of the outer housing, so that the rotating member is rotated by the external rotating mechanism to move in the longitudinal direction of the outer housing. Implants fixed between fractured bones.

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