KR101680889B1 - Spinal hook - Google Patents

Abstract

The present invention relates to a stapler comprising: a first unit having an insertion groove whose lower end is arcuately opposed to an upper end edge and which has an arc shape, forming an inner space and passing through the upper and lower portions; A second unit rotatably received on the lower side of the inner space and the lower part being engaged with a transverse process protruding from both sides of a vertebral body constituting the vertebra; A third unit screwed to the lower side of the inner space and fixing a rod on which an outer circumferential surface of one side is seated in the insertion groove and an outer circumferential surface of the other side is seated in an insertion groove of a first unit adjacent to the first unit; And a fourth unit disposed between the inner space and the upper part of the second unit to limit rotation of the second unit, wherein the angle and the position adjustment, which are performed and installed in accordance with various body shapes of the patient, To enable a free and robust surgical condition to be maintained.

Description

Spinal Hook {SPINAL HOOK}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a spinal hook, and more particularly, to a spinal hook that can be operated and adjusted in accordance with various body shapes of a patient,

The vertebral body (vertebral body) that constitutes the vertebral body can be damaged if the vertebral column is damaged due to an accident, the degenerative disease progresses according to age, or the vertebral column is damaged or deformed due to various causes such as congenital or metabolic diseases. And discs that cushion between the vertebrae, resulting in severe nerve compression and pain, or imbalance of the sagittal plane of the vertebrae.

If the lesion of the spine is mild, conservative treatment is used. However, if the vertebral lesion is severe, insert a fixation device to fix the spine and correct the position of the vertebrae or correct the nerve compression area do.

Fixation devices to fix the vertebrae are to fix multiple spinal screws or vertebrae hooks on the vertebrae of the vertebrae and to stabilize the vertebrae or to adjust the vertebral deformation.

However, among these fixation devices, the vertebrae hook is used to treat vertebral lesions of various patients in order to change the body shape of various patients, It is difficult to control spinal fusion by connecting vertebral hooks with metal rods.

Therefore, to solve and cope with these problems, complicated and additional components are required, and there is a problem due to the lack of diversity of the spinal fixation device itself.

In particular, the lack of versatility of the spinal fixation device itself and the use of additional components can lead to catastrophic problems such as increased operative time or complications.

US Published Patent Application No. US2002 / 0013585 U.S. Published Patent Application No. US2013 / 0018428

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a vertebra fixation device that can be adjusted to various body shapes and spinal lesions of a patient, Hooks.

In order to achieve the above object, according to the present invention, there is provided a portable terminal comprising: a first unit having an insertion groove having an arc shape at a lower end cut out from an upper end edge of the upper end, The upper part is rotatably received on the lower side of the inner space and the lower part is formed by a transverse process protruding from both sides of the vertebral body constituting the vertebra, A second unit to be locked; A third unit screwed to the lower side of the inner space and fixing a rod on which an outer circumferential surface of one side is seated in the insertion groove and an outer circumferential surface of the other side is seated in an insertion groove of a first unit adjacent to the first unit; And a fourth unit disposed between the inner space and the upper portion of the second unit to limit rotation of the second unit.

According to the present invention having the above-described configuration, the following effects can be achieved.

First of all, the present invention is characterized in that the upper part of the second unit is mounted to the first unit that receives the rod and fixes the rod to the third unit to allow pivoting so that the lower part of the second unit is hooked to the transversal part of the vertebral body constituting the vertebra So that it is possible to vary the procedure and the installation angle that can be varied depending on the patient's age, body shape, or disease severity, so that the versatility is excellent.

And, the present invention is characterized in that, when the second unit allowing pivoting is once hooked and connected to the patient's pedicle, lamina, transverse process, It is possible to maintain the solid state by restricting the rotation to the fourth unit so as not to happen and keeping the connection state of the rod between the third unit and the first unit.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view showing the overall configuration of a spinal hook according to an embodiment of the present invention; Fig.
2 is a cross-sectional schematic view showing the overall configuration of a spinal hook according to an embodiment of the present invention.
3 is an enlarged view of a portion A in Fig. 2
4 is an enlarged view of a portion B in Fig. 2
FIG. 5 is a conceptual view illustrating a rotation range of a spinal hook according to an embodiment of the present invention.
6 is a conceptual view illustrating a structure of a ball joint head, which is a main part of a spinal hook according to an embodiment of the present invention.
FIG. 7 is a conceptual diagram illustrating a state in which a vertebra hook is fixed and fixed to the vertebrae, the backbone, and the transverse vertebrae of the vertebrae according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments described below, but may be embodied in various other forms.

The present embodiments are provided so that the disclosure of the present invention is thoroughly disclosed and that those skilled in the art will fully understand the scope of the present invention.

And the present invention is only defined by the scope of the claims.

Thus, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

In addition, throughout the specification, like reference numerals refer to like elements, and the terms (mentioned) used herein are intended to illustrate the embodiments and not to limit the invention.

In this specification, the singular forms include plural forms unless the context clearly dictates otherwise, and the constituents and acts referred to as " comprising (or having) " do not exclude the presence or addition of one or more other constituents and actions .

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 they are defined.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view showing the overall configuration of a spine hook according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view illustrating the overall configuration of a spine hook according to an embodiment of the present invention.

Here, FIG. 3 is an enlarged view of a portion A in FIG. 2, and FIG. 4 is an enlarged view of a portion B in FIG.

5 is a conceptual view illustrating a rotation range of the spinal hook according to an embodiment of the present invention.

FIG. 6 is a conceptual view illustrating a state in which a spinal hook according to an embodiment of the present invention is fixed and fixed to the vertebrae, the lumbar vertebra, and the transverse vertebrae of the vertebrae.

The present invention is characterized in that the rod 500 is seated on the first unit 100 and the third unit 300 is fixed on the rod 500 and the upper part of the second unit 200 is allowed to rotate And the fourth unit 400 can recognize that the rotation of the second unit 200 is restricted when the operation is completed to maintain the rigid operation state.

The first unit 100 has insertion grooves 101 and 101, which are cut away from each other at an upper end edge thereof so as to have a lower end in an arc shape, specifically, a U shape, and form an inner space 102 And serves as a receiver member passing through the top and bottom.

The rod 500 has an outer circumferential surface on one side thereof mounted in the insertion grooves 101 and 101 and an outer circumferential surface on the other side is seated in the insertion grooves 101 and 101 of the first unit 100 adjacent to the first unit 100 will be.

Here, it is preferable that the rod 200 is brought into contact with the inner surface of the inner space 102, that is, the rod 200 is fully seated, as shown in FIG. 2, so that the rod 200 is not shaken or removed.

The upper part of the second unit 200 is rotatably received on the lower side of the inner space 102 and the lower part is a pedicle of a vertebral body constituting the vertebrae (See Fig. 7 (b)), or a transverse process (see Fig. 7 (c)).

The third unit 300 is screwed to the lower side of the inner space 102 to fix the rod 500 and serves as a kind of set screw.

The fourth unit 400 is disposed between the inner space 102 and the upper portion of the second unit 200 to serve as a cap for restricting the rotation of the second unit 200.

Accordingly, the present invention aims at correcting the lesion of the vertebrae, deformation of the vertebrae and maintaining the balance of the sagittal plane by keeping the interval between the vertebral body and the neighboring vertebra constant.

That is, the first unit 100 is provided separately from the first unit 100, and the second unit 200 provided in each first unit 100 is a vertebra (refer to FIG. 7 (a) 7 (b)), or transversely (see Fig. 7 (c)), the rod 500 is interposed between the first unit 100 and the first unit 100 adjacent to the first unit 100 .

It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention.

The first unit 100 can receive the rod 500 as described above and can recognize that the structure includes the head 110, the second screw part 120, and the first ring step 130.

The head 110 is formed such that the insertion grooves 101 and 101 are opposed to each other from the edge of the upper end, and the inner space 102 is formed.

The second threaded portion 120 is formed along the upper inner circumferential surface of the head 110 and coupled with the first threaded portion 310 having a round thread shape formed on the outer peripheral surface of the third unit 300, .

The first ring step 130 is formed along the lower inner circumferential surface of the head 110, and the lower part of the outer surface of the fourth unit 400 is engaged and fixed.

That is, the spinal hook according to an embodiment of the present invention includes a first screw portion 310 having a round screw shape formed on the outer peripheral surface of the third unit 300, And a second threaded portion 120 which is formed in a round thread shape and is fastened to the first threaded portion 310.

Here, the threads having a round screw shape constituting the first and second threaded portions 310 and 120 are respectively connected to a first imaginary line? 1 (see FIG. 2) passing through the central portion along the longitudinal direction of the first unit 100, As shown in Fig.

In other words, the above-mentioned threads may be a general thread, but it is possible to easily insert the third unit 300 into the first unit 100 for the first time, 2 screw portion 120 so that the screw portion 120 can be screwed into the screw portion 120 while being rotated.

More specifically, with respect to the second imaginary line? 2 passing through the center of the thread of the first screw portion 310 or the second screw portion 120 and orthogonal to the first imaginary line? 1 (refer to FIG. 2) The first inclination angle? 1 formed by the second imaginary line? 2 and the thread on the imaginary line? 2 is equal to the second inclination angle? 1 formed by the thread on the lower side of the second imaginary line? 2 and the second imaginary line? 2 < 2 >).

The first and second inclination angles? 1 and? 2 are set to about 10 °.

In the present invention, the first inclination angle? 1 is shown to be larger than the second inclination angle? 2, but the present invention is not limited to this structure, and the first inclination angle? 1 may be equal to the second inclination angle? It goes without saying that the first inclination angle [theta] 1 may be smaller or larger than the second inclination angle [theta] 2.

Meanwhile, as described above, the second unit 200 permits pivoting so as to determine the installation and operation angle in accordance with various body shapes of the patients, and is for rigid installation and maintenance of the operation state. The second unit 200 includes a ball joint head 210, It can be understood that the structure includes the hook piece 221 and the hook piece 222.

That is, the ball joint head 210 is rotatably received in the fourth unit 400 to be described later until it is fixed after the procedure. When the rod 500 is fixed to the third unit 300, 4 unit 400, and allows a slight rotation within a range of a rotation angle? 3 of about 12 degrees.

The connecting piece 221 extends from the lower side of the ball joint head 210 and the hook piece 222 extends in an arcuate shape extending from one end of the connecting piece 221 and is hooked on the vertebra, It is fixed.

Here, the ball joint head 210 may be formed in a circular or elliptical cross section whose upper portion is cut flat, and may be formed into various types of spherical shapes having a circular cross section although not specifically shown.

In this case, the ball joint head 210 has an elliptical cross section having a major axis that is short in the vertical direction of the internal space 102, that is, the first imaginary line l1, Having a spherical cross section of various shapes including an ellipse having a minor axis perpendicular to the major axis and a first imaginary line ll direction being a major axis (see FIG. 2) ) Structure) can be selectively used.

In addition, the ball joint head 210 has a ring-shaped protrusion concentrically formed from the center of the upper end portion of the ball joint head 210 toward the lower end side so as to maintain a firm engagement state with the fourth unit 400 It is preferable to further include the first engaging pattern 211. [

More specifically, the first engaging pattern 211 allows a plurality of concentric circles, that is, cylindrical protrusions, to be repeatedly formed at the center of the upper end of the ball joint head 210.

Accordingly, the first engaging pattern 211 is engaged with the fourth unit 400 to restrict the rotation of the ball joint head 210. [

The structure of the ball joint head 210 will be described in more detail with reference to FIG.

6, a center point P passing through the center of the imaginary circle extending upward from the lower outer surface of the ball joint head 210 can be defined.

Here, the first radius R1 extending from the center point P to the end of the first engaging pattern 211, which will be described later, formed of a plurality of projections formed in a columnar shape on the upper outer surface of the ball joint head 210, P to a lower outer surface of the ball joint head 210. The second radius R2 may be smaller than the second radius R2.

The first radius R1 described above may be formed larger than the third radius R3 extending from the center point P to one of the above-mentioned plurality of projections and a concave portion between the adjacent projections.

That is, the ball joint head 210 is accommodated in the inner space 102 of the first unit 100 and is fixed to the fourth unit 400 on the upper and lower sides. The ball joint head 210 has a constant rotation angle? ), It is possible to vary the angle of operation and angle of installation according to the patient's age, body shape, or disease severity, which is superior in terms of versatility.

In the present invention, the first engaging pattern 211 is formed on the ball joint head 210. However, the present invention is not limited to this structure. Specifically, the first engaging pattern 211 may be formed on the inclined surface portion of the fourth unit 400, It may be formed in a shape such as a smooth sphere or an elliptical shape in which the first engaging pattern 211 is omitted so as to be contact-fixed with the inner surface of the first engaging portion 414 by frictional force.

Accordingly, the second unit 200 can be a pedicle as shown in Fig. 7 (a), a lamina as shown in Fig. 7 (b), or a transverse process as shown in Fig. 7 (c) It has the same shape as fixed hooks.

The fourth unit 400 is provided for restricting the rotation of the second unit 200 and for maintaining a stable state of operation as described above. The fourth unit 400 includes a ring fixing piece 410 and a resilient ring supporting piece 420 Structure can be understood.

The ring fixing piece 410 is seated in the inner space 102 by pressing the upper outer surface of the ball joint head 210 disposed on the upper portion of the second unit 200 and is brought into contact with the outer circumferential surface of the rod 500 at the upper portion, And is pressed by the fastening force of the third unit 300 coupled with the first unit 100.

The elastic ring support piece 420 is engaged with the first ring step 130 formed along the lower inner peripheral surface of the inner space 102 and supports the lower outer surface of the ball joint head 210 while allowing elastic deformation.

The ring fixing piece 410 is more specifically a structure including the contact ring portion 412, the inclined surface portion 414, and the second engaging pattern 416.

That is, the contact ring portion 412 is a ring-shaped member that passes through the upper and lower portions and has an outer circumferential surface that is contact-fixed to the inner circumferential surface of the first unit 100 forming the inner space 102.

The inclined surface portion 414 extends downward along the lower edge of the contact ring portion 412 and has a pressing groove 413 having a shape corresponding to the upper outer surface of the ball joint head 210 on the inner side of the bottom surface.

The second engaging pattern 416 is formed so as to extend from the center of the upper end of the ball joint head 210 toward the lower end side in the direction of forming the pushing grooves 413 corresponding to the first engaging patterns 211 in which the concentric ring- As shown in FIG.

The ring fixing piece 410 further includes a fixing ring 425 which is generally cylindrical in shape and one side of which is cut out to allow deformation and which is fixed to the outer surface between the contact ring portion 412 and the inclined surface portion 414 May be applied.

The fixing ring 425 is fixed on the outer surface of the ring fixing piece 410 so that one side thereof is cut out to have a shape deformation and more specifically an elastic restoring force so that the ring fixing piece 410 When the retention ring 425 is inserted into the first unit 100, the retention ring 425 is restored to its original shape, and a retaining structure for preventing the ring fixing piece 410 from being detached from the first unit 100 member.

In other words, the stationary ring 425 is fitted on the outer surface of the ring fixing piece 410 of the fourth unit 400 so that one side thereof is cut to have a shape deformation, more specifically, an elastic restoring force, Is a technical means for preventing the fourth unit 400 from being easily detached from the first unit 100 after the third unit 400 is inserted into the first unit 100 and after the fourth unit 400 is inserted.

In other words, the retaining ring 425 is located in the groove 411 (see Fig. 1) formed concavely between the contact ring portion 412 and the slanting surface portion 414 of the ring fixing piece 410, The accommodated retaining ring 425 prevents elastic deformation when the fourth unit 400 is inserted into the first unit 100 while preventing the fourth unit 400 from separating from the lower space of the first unit 100 So that the third unit 400 can be easily inserted.

The elastic ring support piece 420 can be understood to be a structure including the support main body 421, the third ring step 423 and the deformed cutout part 424. The support main body 421 has a ring- And a second ring step 422 that supports the lower outer surface of the ball joint head 210 along the second ring step.

The third ring step 423 is formed to be stepped along the outer circumferential surface of the support main body 421 and fixed to the first ring step 130.

The deformed cutout portion 424 is formed by cutting a part of the outer peripheral surface of the support body 421 along the vertical direction of the support body 421. [

The diameter of the support body 421 can be varied corresponding to the width of the deformed cutout portion 424 and the diameter of the support body 421 can be reduced so that the first unit 100, And once the support body 421 is received in the head 110, it can be closely fixed to the lower portion of the head 110 with an elastic restoring force.

As described above, according to the present invention, it is understood that the basic technical idea is to provide a vertebra hook which can be adjusted according to various body shapes of a patient and can be installed and maintained in a stable and rigid state of operation.

It will be apparent to those skilled in the art that many other modifications and applications are possible within the scope of the basic technical idea of the present invention.

100 ... first unit
101, 101 ... insertion groove
102 ... interior space
110 ... head
120 ... second threaded portion
130 ... 1st ring step
200 ... second unit
210 ... ball joint head
221 ... connecting piece
222 ... hook
300 ... third unit
310 ... first screw portion
400 ... fourth unit
410 ... ring fixing piece
411 ... home
412 ... contact ring portion
413 ... Pressing groove
414 ... inclined surface portion
416 ... 2nd engage pattern
420 ... elastic ring support
421 ... support body
422 ... second ring step
423 ... third ring step
424 ... deformation section
425 ... fixed ring
500 ... load

Claims (13)

A first unit having an insertion groove having an arc shape at a lower end cut out from an upper end edge of the upper end portion and forming an inner space and passing through the upper and lower portions;
A rod on which an outer peripheral surface of one side is seated in the insertion groove and an outer peripheral surface of the other side is seated in an insertion groove of a first unit adjacent to the first unit;
A second unit rotatably received on the lower side of the inner space, and a lower part screwed and secured to a vertebral body constituting the vertebra;
A third unit screwed on the upper side of the inner space to fix the rod; And
And a fourth unit disposed between the inner space and the upper portion of the second unit to limit rotation of the second unit,
here,
Wherein the fourth unit comprises:
And a second ball bearing which is seated in the inner space by pressing the upper outer surface of the ball joint head disposed on the upper portion of the second unit and is brought into contact with the outer circumferential surface of the rod at the upper portion and pressed by the fastening force of the third unit engaged with the first unit A ring fixing piece,
And a resilient ring support piece which is fixedly secured to a first ring step formed stepwise along a lower inner circumferential surface of the inner space and supports the lower outer surface of the ball joint head while allowing elastic deformation,
The ring fixing member
A ring-shaped contact ring portion having an upper surface and a lower surface and having an outer circumferential surface contactably fixed to an inner circumferential surface of the first unit forming the inner space;
An inclined surface portion extending downward along a lower edge of the contact ring portion and having a pressing groove having a shape corresponding to an upper outer surface of the ball joint head,
A second engaging pattern formed in plural along the forming direction of the pushing groove in correspondence with a first engaging pattern in which ring-shaped protrusions and grooves are repeated from the center of the upper end of the ball joint head toward the lower end side,
And a C ring mounted on an outer surface between the contact ring portion and the slope portion, the C ring having a part of the ring-
Screw assembly for spinal implant.
The method according to claim 1,
The first unit includes:
Wherein the insertion groove is formed so as to face each other from the edge of the upper end,
A second threaded portion formed along a top inner circumferential surface of the head and having a round screw shape to be engaged with a first screw portion having a round screw shape formed on an outer circumferential surface of the third unit;
And a first ring step formed along the lower inner circumferential surface of the head and to which the lower surface of the outer surface of the fourth unit is fastened.
The method according to claim 1,
The screw assembly for a spinal implant,
A first screw portion having a round screw shape formed on an outer peripheral surface of the third unit,
And a second threaded portion formed along an upper inner circumferential surface of the inner space of the first unit and having a round screw shape to be fastened to the first screw portion,
Wherein screw threads having a rounded screw shape constituting the first and second screw portions are each formed so as to be upwardly inclined with respect to a first imaginary line passing through the central portion along the vertical direction of the first unit.
The method of claim 3,
The first imaginary line passing through the center of the thread of the first thread portion or the second thread portion and perpendicular to the first imaginary line, the first inclination angle formed by the thread on the upper side of the second imaginary line and the second imaginary line, And a second inclination angle formed between the second hypothetical line and a second hypothetical line. The screw assembly of claim 1,
The method according to claim 1,
The second unit comprising:
A ball joint head housed in the inner space and fixed to the upper and lower portions by the fourth unit,
A connecting piece extending from a lower side of the ball joint head,
And a hook-shaped hook piece bent and extended from an end of the connecting piece in an arc shape and hooked and fixed to the vertebra of the vertebrae, the lug plate, and the transverse bolt.
The method of claim 5,
Wherein the ball joint head comprises:
Wherein the upper portion is a spherical cross-section of various shapes including an ellipse cut flat.
The method of claim 5,
Wherein the ball joint head comprises:
The top is a flat cross-section of various shapes,
Further comprising a first engagement pattern in which a ring-shaped protrusion concentrically formed from the center of the upper end of the ball joint head toward the lower end side is repeatedly formed,
Wherein the first engagement pattern is engaged with the fourth unit to limit rotation of the ball joint head.
delete delete The method according to claim 1,
The elastic ring support member
A ring-shaped support body having a second ring step to support the lower outer surface of the ball joint head along the lower side of the inner circumferential surface,
A third ring step formed stepwise along the outer circumferential surface of the support body and fixed to the first ring step,
And a deformation cutout portion formed by cutting a part of the outer circumferential surface of the support body along the vertical direction of the support body,
Wherein a diameter of the support body is variable corresponding to a width of the deformed cutout portion.
The method according to claim 1,
The ring fixing member
Further comprising a retaining ring which is engaged with the contact ring portion and the inclined surface portion,
Wherein the fixing ring is located in a groove formed in an outer surface of the ring fixing member and facilitates insertion of the ring fixing member into the first unit and prevents the ring fixing member from separating from the first unit Screw assembly for spinal implant.
The method of claim 7,
The elastic ring support member
A ring-shaped support body having a second ring step to support the lower outer surface of the ball joint head along the lower side of the inner circumferential surface,
A third ring step formed stepwise along the outer circumferential surface of the support body and fixed to the first ring step,
And a deformation cutout portion formed by cutting a part of the outer circumferential surface of the support body along the vertical direction of the support body,
Wherein a diameter of the support body is variable corresponding to a width of the deformed cutout portion.
A first unit having an insertion groove having an arc shape at a lower end cut out from an upper end edge of the upper end portion and forming an inner space and passing through the upper and lower portions;
The upper part is rotatably received on the lower side of the inner space and the lower part is fixed to the pedicle, the lamina or the transverse process of the vertebral body constituting the vertebra, unit;
Wherein the first unit is disposed between the inner space and the upper portion of the second unit and restricting the rotation of the second unit by pressing the upper outer surface of the ball joint head disposed on the upper portion of the second unit, A ring fixing piece on which an outer circumferential surface of one side is seated in the insertion groove and an outer circumferential surface of the rod on which the outer circumferential surface of the other side is seated is in contact with an upper portion of the insertion groove of the first unit adjacent to the first unit;
An elastic ring supporting member which is fixed to a first ring step formed so as to be stepped along a lower inner circumferential surface of the inner space and supports the lower outer surface of the ball joint head while allowing elastic deformation; And
And a stationary ring which is cut and fixed on one side of the ring fixing member,
Wherein the fixing ring is located in a groove formed in an outer surface of the ring fixing member and facilitates insertion of the ring fixing member into the first unit and prevents the ring fixing member from separating from the first unit Spinal hook.

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