CN215129876U - Titanium rod connector and posterior spinal internal fixation system - Google Patents

Abstract

The utility model discloses a titanium rod connector and a posterior spinal internal fixation system, belonging to the technical field of orthopedic implants, wherein the titanium rod connector comprises a first rod clamp and a second rod clamp which are arranged side by side, the first rod clamp is provided with a first U-shaped groove for placing a first titanium rod, one side wall of the first U-shaped groove is provided with a transverse extension part, and the horizontal end face of the transverse extension part is provided with a ball socket; the second stick presss from both sides has the second U-shaped groove that is used for placing the second titanium stick, and a lateral wall in second U-shaped groove is equipped with transverse connection board, and transverse connection board's tip is equipped with vertical cavity stand, and the end of cavity stand is equipped with and is used for with ball socket matched with bulb, and the bulb divide into two at least ball clacks, is equipped with the taper pin that is used for strutting the ball clack in the bulb, is equipped with the fastener that is used for fixed taper pin in the cavity stand. The utility model discloses can realize angle modulation, the U-shaped groove on first excellent clamp and the second excellent clamp can initiatively adapt to the position of titanium stick, convenient to use, and is fixed firm, and clinical effect is good.

Description

Titanium rod connector and posterior spinal internal fixation system

Technical Field

The utility model relates to an orthopedic implant technical field especially indicates a titanium stick connector and backbone way of escape internal fixation system.

Background

Spinal surgery aims to correct spinal deformities, relieve pain, stabilize the spine and protect nerves. The posterior spinal internal fixation is one of the main treatment means, and the safety and the effectiveness of the posterior spinal internal fixation system product used in the operation directly influence the treatment effect of diseases.

The thoracolumbar posterior fixation system is mainly suitable for degenerative diseases of thoracolumbar (intervertebral disc diseases, facet joint degeneration), instability (anterior shift, posterior shift, lateral shift and the like), slippage, trauma (fracture, dislocation, old fracture pseudoarthroplasty and the like), spinal stenosis, deformity (scoliosis, kyphosis, lordosis), tumors, infection (tuberculosis, suppurative spondylitis, cloth diseases and the like), thoracolumbar revision surgery and the like.

In the prior art, often adopt the titanium stick connector to link together two titanium sticks of mutually independent to improve internal fixation system's bulk strength, however current titanium stick connector adopts fixed angle structure more (be used for connecting the U-shaped groove of titanium stick for fixed angle and orientation, the titanium stick needs to go the angle that adapts to the U-shaped groove), leads to using inconveniently, and clinical effect is unsatisfactory.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a titanium stick connector and spinal back way internal fixation system with adjustable angle.

In order to solve the technical problem, the utility model provides a technical scheme as follows:

in one aspect, a titanium rod connector is provided, comprising a first rod clamp and a second rod clamp arranged side by side and hingedly connected, wherein:

the first rod clamp is provided with a first U-shaped groove for placing a first titanium rod, one side wall of the first U-shaped groove is provided with a transverse extending part, and a ball socket is arranged on the horizontal end face of the transverse extending part;

the second rod clamp is provided with a second U-shaped groove used for placing a second titanium rod, one side wall of the second U-shaped groove is provided with a transverse connecting plate, the end portion of the transverse connecting plate is provided with a vertical hollow upright post, the tail end of the hollow upright post is provided with a ball head matched with the ball socket, the ball head and the ball socket form hinged connection, the ball head is divided into at least two ball flaps, a taper pin used for opening the ball flaps is arranged in the ball head, and a fastener used for fixing the taper pin is arranged in the hollow upright post.

Further, the lateral extension is positioned at the upper part of one side wall of the first U-shaped groove, the ball socket is positioned on the horizontal end surface of the lower side of the lateral extension, and the lateral connecting plate is positioned at the lower part of one side wall of the second U-shaped groove;

or, the transverse extending part is positioned at the lower part of one side wall of the first U-shaped groove, the ball socket is positioned on the horizontal end surface of the upper side of the transverse extending part, and the transverse connecting plate is positioned at the upper part of one side wall of the second U-shaped groove.

Furthermore, the interior of the ball valve is a conical cavity body matched with the conical pin.

Further, the number of the ball valves is 3-6.

Further, the number of the ball valves is 4.

Furthermore, the hollow upright post is provided with an internal thread, and the fastening piece is a locking screw connected to the internal thread;

or, be equipped with the ring tooth in the cavity stand, the fastener is that the surface has the ring tooth and the pin of joint in the cavity stand.

Furthermore, the longitudinal section of the ball socket is a super semicircle.

Furthermore, the first U-shaped groove is provided with an internal thread, and the internal thread is connected with a first pressing cap for fixing the first titanium rod;

and/or the second U-shaped groove is provided with internal threads, and the internal threads are connected with a second pressing cap for fixing a second titanium rod.

In another aspect, a posterior spinal fixation system is provided, which comprises a pedicle screw, a first titanium rod, a second titanium rod and the titanium rod connector.

The utility model discloses following beneficial effect has:

the titanium rod connector and the posterior spinal internal fixation system of the utility model comprise a first rod clamp and a second rod clamp which are arranged side by side, wherein the first rod clamp is provided with a ball socket, the second rod clamp is provided with a ball head which is matched with the ball socket, and the ball head is matched with the ball socket to realize multi-direction angle adjustment; the combination of the ball head with the ball valve, the taper pin and the fastener for fixing the taper pin can improve the fixing strength of the first rod clamp and the second rod clamp. The utility model discloses can realize the multi-angle and adjust, the U-shaped groove on first excellent clamp and the second excellent clamp can initiatively adapt to the position of titanium stick, convenient to use, and is fixed firm, and clinical effect is good.

Drawings

FIG. 1 is a schematic view of a titanium rod connector according to the present invention;

FIG. 2 is a front view of the titanium rod connector of FIG. 1;

FIG. 3 is a cross-sectional view of the titanium rod connector shown in FIG. 1;

FIG. 4 is an exploded view of the titanium rod connector of FIG. 1;

FIG. 5 is a schematic view showing a variation of the titanium rod connector shown in FIG. 1, wherein (a) is a schematic view showing a structure in which two connected titanium rods are parallel, (b) is a schematic view showing a structure in which a lower titanium rod is adjusted by 90 degrees counterclockwise, and (c) is a schematic view showing a structure in which a lower titanium rod is adjusted by 90 degrees clockwise;

fig. 6 is a schematic diagram showing a variation of the titanium rod connector shown in fig. 2, wherein (a) is a schematic diagram showing two connected titanium rods being parallel and located on the same horizontal plane, (b) is a schematic diagram showing the right second rod clamp being adjusted by 40 ° counterclockwise, and (c) is a schematic diagram showing the right second rod clamp being adjusted by 10 ° clockwise.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

In one aspect, the present invention provides a titanium rod connector, as shown in fig. 1-6, comprising a first rod clamp 1 and a second rod clamp 2 arranged side by side and connected in an articulated manner, wherein:

the first rod clamp 1 is provided with a first U-shaped groove 11 for placing the first titanium rod 3, one side wall of the first U-shaped groove 11 is provided with a transverse extension part 12, and the horizontal end face of the transverse extension part 12 is provided with a ball socket 13;

the second rod clamp 2 is provided with a second U-shaped groove 21 for placing a second titanium rod 4, one side wall of the second U-shaped groove 21 is provided with a transverse connecting plate 22, the end portion of the transverse connecting plate 22 is provided with a vertical hollow upright column 23, the tail end of the hollow upright column 23 is provided with a ball head 24 matched with the ball socket 13, the ball head 24 and the ball socket 13 form hinged connection, the ball head 24 is divided into at least two ball flaps, a taper pin 25 used for expanding the ball flaps is arranged in the ball head 24, and a fastener used for fixing the taper pin 25 is arranged in the hollow upright column 23.

When the connector is shipped, the ball head 24 and the ball socket 13 are relatively buckled in advance, the taper pin 25 is inserted into the ball head 24, and the taper pin 25 is pre-fixed by a fastener. When in use, the following two use modes can be referred to:

the first use mode is as follows: directly implanting a titanium rod connector, fixing a first titanium rod 3 to a first rod clamp 1, adjusting the direction of a second rod clamp 2 according to the position of a second titanium rod 4, fixing the second titanium rod 4 to the second rod clamp 2, fixing a taper pin 25 by using a fastener, and expanding and locking a ball head 24 in a ball socket 13, so that the first rod clamp 1 and the second rod clamp 2 are locked, and the connection among the titanium rod connector, the first titanium rod 3 and the second titanium rod 4 is completed;

the second use mode is as follows: after the angle between the first rod clamp 1 and the second rod clamp 2 is adjusted in advance according to the angle and the position of the first titanium rod 3 and the second titanium rod 4, the taper pin 25 is fixed through the fastener so as to lock the first rod clamp 1 and the second rod clamp 2, then the titanium rod connector is implanted, and the first titanium rod 3 and the second titanium rod 4 are fixed to the first rod clamp 1 and the second rod clamp 2 respectively, so that the installation is completed.

The titanium rod connector comprises a first rod clamp and a second rod clamp which are arranged side by side, wherein a ball socket is arranged on the first rod clamp, a ball head matched with the ball socket is arranged on the second rod clamp, and the ball head is matched with the ball socket to realize multi-direction angle adjustment; the combination of the ball head with the ball valve, the taper pin and the fastener for fixing the taper pin can improve the fixing strength of the first rod clamp and the second rod clamp. The utility model discloses can realize the multi-angle and adjust, the U-shaped groove on first excellent clamp and the second excellent clamp can initiatively adapt to the position of titanium stick, convenient to use, and is fixed firm, and clinical effect is good.

As shown in fig. 1-4, the lateral extension 12 may be located at the upper part of one side wall of the first U-shaped groove 11, the ball socket 13 is located at the horizontal end surface of the lower side of the lateral extension 12, and the lateral web 22 is located at the lower part of one side wall of the second U-shaped groove 21, in which case the second use mode described above is preferably adopted to facilitate the installation operation (mainly the final operation of the fastener); it is conceivable that the lateral extension 12 could also be located at the lower part of one side wall of the first U-shaped groove 11 and the ball socket 13 at the horizontal end surface of the upper side of the lateral extension 12 and, correspondingly, the lateral web 22 could be located at the upper part of one side wall of the second U-shaped groove 21, in which case the first use described above is preferred.

As shown in fig. 3, in order to make the taper pin 25 better spread the ball head 24 to firmly connect the first and second clamps 1 and 2, the inner part of the ball lobe of the ball head 24 may be a tapered cavity corresponding to the taper pin 25. To facilitate spreading the bulb 24, the number of petals can be 3-6, preferably 4. The longitudinal cross-section of the socket 13 is preferably over-semicircular, so that the distracted ball 24 is prevented from escaping from the socket 13.

The utility model discloses well fastener can adopt various structural style, for example: the hollow upright column 23 can be provided with internal threads, the fastening piece is a locking screw 28 connected with the internal threads, and the locking screw 28 connected with the internal threads can be conveniently detached and readjusted; for another example: the fastener can also adopt a clamping fixing mode, namely: the hollow upright column 23 can be internally provided with ring teeth, and the fastener is a pin which is provided with the ring teeth on the outer surface and is clamped in the hollow upright column.

The fixing of the titanium rod by the U-shaped grooves of the first and second rod clamps 1, 2 can be performed by the conventional techniques in the field, such as:

the first U-shaped groove 11 may be provided with an internal thread 14, the internal thread 14 being connected with a first press cap 15 for fixing the first titanium rod 3;

the second U-shaped groove 21 may be provided with an internal thread 26, which internal thread 26 is connected with a second press cap 27 for fixing the second titanium rod 4.

Fig. 5 and fig. 6 are schematic diagrams of the change state of the titanium rod connector of the present invention, and it can be seen from fig. 5 and fig. 6, the present invention can adapt to the adjustment of the wide angle range, and better satisfies the clinical use requirement.

On the other hand, the utility model provides a way internal fixation system behind spine, including pedicle of vertebral arch screw, first titanium stick and second titanium stick, still include foretell titanium stick connector, because the structure of titanium stick connector is the same with last, no longer gives unnecessary details here.

The utility model discloses a posterior spinal internal fixation system, which comprises a first bar clamp and a second bar clamp which are arranged side by side, wherein the first bar clamp is provided with a ball socket, the second bar clamp is provided with a ball head which is matched with the ball socket, and the ball head is matched with the ball socket to realize multidirectional angle adjustment; the combination of the ball head with the ball valve, the taper pin and the fastener for fixing the taper pin can improve the fixing strength of the first rod clamp and the second rod clamp. The utility model discloses can realize angle modulation, the U-shaped groove on first excellent clamp and the second excellent clamp can initiatively adapt to the position of titanium stick, convenient to use, and is fixed firm, and clinical effect is good.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A titanium rod connector comprising a first rod clamp and a second rod clamp arranged side by side and hingedly connected, wherein:

the first rod clamp is provided with a first U-shaped groove for placing a first titanium rod, one side wall of the first U-shaped groove is provided with a transverse extending part, and a ball socket is arranged on the horizontal end face of the transverse extending part;

the second rod clamp is provided with a second U-shaped groove used for placing a second titanium rod, one side wall of the second U-shaped groove is provided with a transverse connecting plate, the end portion of the transverse connecting plate is provided with a vertical hollow upright post, the tail end of the hollow upright post is provided with a ball head matched with the ball socket, the ball head and the ball socket form hinged connection, the ball head is divided into at least two ball flaps, a taper pin used for opening the ball flaps is arranged in the ball head, and a fastener used for fixing the taper pin is arranged in the hollow upright post.

2. The titanium rod connector of claim 1, wherein said lateral extension is located at an upper portion of one side wall of said first U-shaped groove, said ball socket is located on a horizontal end surface of a lower side of said lateral extension, and said lateral connecting plate is located at a lower portion of one side wall of said second U-shaped groove;

or, the transverse extending part is positioned at the lower part of one side wall of the first U-shaped groove, the ball socket is positioned on the horizontal end surface of the upper side of the transverse extending part, and the transverse connecting plate is positioned at the upper part of one side wall of the second U-shaped groove.

3. The titanium rod connector of claim 1, wherein the interior of the ball lobe is a tapered cavity that conforms to the tapered pin.

4. The titanium rod connector of claim 1, wherein the number of said ball lobes is 3-6.

5. The titanium rod connector of claim 4, wherein the number of ball lobes is 4.

6. The titanium rod connector of claim 1, wherein said hollow post is internally threaded, and said fastener is a locking screw attached to said internal thread;

or, be equipped with the ring tooth in the cavity stand, the fastener is that the surface has the ring tooth and the pin of joint in the cavity stand.

7. The titanium rod connector of claim 1, wherein the longitudinal cross-section of the ball socket is a hyper-semi-circle.

8. The titanium rod connector of any one of claims 1 to 7, wherein said first U-shaped groove is provided with an internal thread having a first press cap attached thereto for securing a first titanium rod;

and/or the second U-shaped groove is provided with internal threads, and the internal threads are connected with a second pressing cap for fixing a second titanium rod.

9. A posterior spinal fixation system comprising a pedicle screw, a first titanium rod and a second titanium rod, further comprising the titanium rod connector of any one of claims 1-8.

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