CN209499868U - A kind of lumbar vertebrae side anterior stabilization internal fixation system - Google Patents

Abstract

The utility model discloses a lumbar lateral anterior fusion internal fixation system, which comprises a fusion device, a locking plate, a locking bolt, a bone screw and a mounting mechanism. The mounting mechanism includes a bracket, and the front end of the bracket is provided with a clamping part. The center of the bracket is provided with an axial through hole, and the side of the clamping part of the bracket is provided with a guide hole. The utility model has the advantages of simplifying operation steps, reducing operation time, reducing trauma, and realizing accurate installation and fixation of locking bolts and bone screws.

Description

An internal fixation system for lumbar lateral anterior fusion

technical field

The utility model relates to a medical device, in particular to a lumbar lateral anterior fusion internal fixation system.

Background technique

At present, after the diseased intervertebral disc is removed, a fusion cage is usually used to replace the intervertebral disc resection, and then a multi-step internal fixation operation is performed using suitable steel plates and bone screws. The fusion cage is implanted in the removed intervertebral disc, and then the special tool is used to hold the steel plate and place it at the position where the fusion cage is implanted. Then, special tools are used to drill holes, screw in temporary fixing screws, and then rotate and drive into the bone in sequence. Screws, which ultimately secure the plate to the vertebrae of the spine.

This method of fusion fixation will produce many adverse effects. For example, different special tools are used for fusion fixation, which requires many surgical steps, long time, and large trauma; bone screws are easy to be misaligned and driven into the cancellous bone area, resulting in the stability of the locking plate. Sex is poor. The emergence of these problems will also cause problems such as repeated rework of surgery and increase the risk of surgery in disguise.

Utility model content

In order to solve the above technical problems, the purpose of this utility model is to provide a lumbar lateral anterior fusion internal fixation system, which can simplify operation steps, reduce operation time, reduce trauma, and realize accurate installation and fixation of bone screws.

The utility model is realized through the following technical solutions: a lumbar lateral anterior fusion internal fixation system, including a fusion device, a locking plate, a locking bolt, a bone screw and a mounting mechanism, the mounting mechanism includes a bracket, and the front end of the bracket is equipped with There is a clamping part, and the clamping part is used to clamp the locking plate; the center of the bracket is provided with an axial through hole, and the locking bolt passes through the axial through hole to fix the locking plate to the cage On the end face; a drill guide hole is provided on the side of the clamping part of the bracket, and the bone screw passes through the drill guide hole to fix the locking plate to the vertebrae of the spine.

Wherein, a second through hole is provided at the center of the end face of the locking plate, and the axial through hole is aligned with the second through hole when the locking plate is clamped by the installation mechanism.

Both sides of the end surface of the locking plate are respectively provided with third through holes, and both sides of the clamping part of the bracket are respectively provided with guide holes, and when the locking plate is clamped by the installation mechanism, the guide holes Align with the third through hole of the locking plate respectively.

The sides of the locking plate are respectively provided with two limiting grooves, and the clamping part is provided with a protrusion matching the limiting grooves of the locking plate.

The fusion internal fixation system also includes a socket wrench freely movable in the axial through hole, the front end of the socket wrench is provided with a hexagonal hollow structure matching the nut of the locking bolt, and the rear end is provided with a connecting cap.

The fusion internal fixation system further includes a screwdriver rod, and the screwdriver rod is used to screw the bone screw into the vertebrae of the spine through the drill guide hole and the third through hole.

The fusion internal fixation system further includes a block, the block is first screwed to the locking plate and then riveted, and when the block is in a riveted state, the block covers the third through holes on both sides of the locking plate.

The second through hole is provided with an internal thread, the blocking piece is provided with a connecting end and a shielding end surface, the connecting end is provided with an external thread matching the internal thread of the second through hole, and the two ends of the shielding end surface are narrow and long, so When the blocking piece is in the riveting state, the long and narrow ends of the blocking end surface respectively cover the third through holes on both sides of the locking plate.

The rear end of the bracket is provided with a handle.

A lumbar lateral anterior fusion internal fixation system of the utility model has the following beneficial effects: it provides a more convenient and fast installation mechanism, simplifies the installation and fixation of the fusion device and the locking plate, and reduces the operation steps and operation time; The axial through hole and the guide drill hole on the mechanism respectively realize the accurate positioning of the locking bolt and the bone screw to the target position, which has good stability, avoids repeated rework of the operation, and reduces the risk of the operation.

Description of drawings

In order to illustrate the technical solution of the utility model more clearly, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some of the utility models. Embodiments, for those skilled in the art, other drawings can also be obtained according to these drawings without creative work.

Fig. 1 is the structural diagram of the installation mechanism of the utility model embodiment one;

Fig. 2 is an exploded structural diagram of the installation mechanism of Embodiment 1 of the present utility model;

Fig. 3 is the structural diagram of fusion device, locking plate, baffle, locking bolt and bone screw of the present invention;

Fig. 4 is a structural diagram of another angle of the fusion device, locking plate and blocking piece of the present invention;

Fig. 5 is a structural diagram of a fusion internal fixation system according to Embodiment 2 of the present invention;

Fig. 6 is a cross-sectional view of the fusion internal fixation system according to the second embodiment of the present invention.

Among them, the corresponding marks of the accompanying drawings in the figure are:

1-Fuser 2-Locking plate 3-Block

4-Locking Bolt 5-Bone Screw 6-Mounting Mechanism

7-Socket wrench 8-driver rod

11-first through hole 21-second through hole 22-third through hole

23-limiting groove 31-connecting end 32-blocking end face

61-Bracket 62-Clamping part 63-Protrusion

64-First handle 65-Axial through hole 66-Limiting groove

67-Aimer 68-Second handle 69-Pilot drill hole

Detailed ways

The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment one

Referring to accompanying drawings 1, 2, 3 and 4 of the instruction manual, it is a lumbar lateral anterior fusion internal fixation system of the present utility model, including a fusion device 1, a locking plate 2, a blocking plate 3, and a locking bolt 4. Bone screw 5, installation mechanism 6, socket wrench 7 and screwdriver rod 8;

The end face of fusion device 1 is provided with a first through hole 11, and an internal thread is provided in the first through hole 11;

The center of the end surface of the locking plate 2 is provided with a second through hole 21, and the second through hole 21 is provided with an internal thread, and the two sides of the end surface of the locking plate 2 are respectively provided with a third through hole 22, and the two sides of the locking plate 2 are respectively provided with two limiters. Groove 23;

The baffle 3 is provided with a connecting end 31 and a shielding end face 32, the connecting end 31 and the shielding end face 32 are provided with a through central hole, the connecting end 31 is provided with an external thread matching the internal thread of the second through hole 21, and the two ends of the shielding end face 32 Long and narrow, when the blocking piece 3 is riveted to the end face of the locking plate 2, the narrow and long ends of the shielding end face 32 respectively cover the third through holes 22 on both sides of the locking plate 2;

The locking bolt 4 passes through the central hole of the blocking plate 3 and is screwed with the internal thread of the first through hole 11, and the nut of the locking bolt 4 is a hexagonal structure, and the size of the nut is larger than the central hole of the blocking plate 3;

The outer diameter of the bone screw 5 is smaller than the third through hole 22, and the locking plate 2 can be fixed to the vertebrae of the spine through the third through hole 22;

The installation mechanism 6 includes a bracket 61. The front end of the bracket 61 is provided with a clamping portion 62 for clamping the locking plate 2. The clamping portion 62 is provided with a protrusion 63 matching the limiting groove 23 of the locking plate 2. The end is provided with a first handle 64;

The center of the bracket 61 is provided with an axial through hole 65, and the locking bolt 4 can pass through the axial through hole 64;

Both sides of the clamping portion 62 of the bracket 61 are provided with limiting grooves 66. The limiting grooves 66 are used in conjunction with the sight 67. The sight 67 is fixedly connected with a second handle 68. When in use, the second handle 68 drives the sight 67 within the limit Slide in the bit groove 66, when the clamping part 62 clamps the locking plate 2, the front end of the collimator 67 is against the end surface of the locking plate 2, and the drill guide hole 69 of the collimator 67 corresponds to the third through hole 22 of the locking plate 2, and the bone screw 5. Rotate through the drill guide hole 69 and the third through hole 22 and drive into the vertebrae of the spine;

The socket wrench 7 is longer than the bracket 61, and the outer diameter of the socket wrench 7 is smaller than the diameter of the axial through hole 65, and can move freely in the axial through hole 65. Matching hexagonal hollow structure, the rear end of the socket wrench 7 is provided with a connecting cap, and the outer diameter of the connecting cap is larger than the diameter of the axial through hole 65;

The outer diameter of the screwdriver rod 8 is smaller than the diameter of the drill guide hole 69 of the collimator 67, and the screwdriver rod 8 can rotate freely in the drill guide hole 69 for rotating the bone screw 5 into the spinal vertebrae.

According to this, when in use, the first step is to fix the blocking piece 3 and the locking plate 2, and screw the blocking piece 3 into the second through hole 21 of the locking plate 2 through a special tool. At this time, the locking plate 2 is not riveted, and the blocking piece 3 The blocking end surface 32 of the locking plate 2 deviates from the third through hole 22;

The second step is to fix the locking plate 2 and the cage 1, use the installation mechanism 6 to clamp the locking plate 2, hold the socket wrench 7 with the other hand and put it into the axial through hole 65 of the bracket 61, and place the locking bolt 4 in advance In the hexagonal hollow structure at the front end of the socket wrench 7, the locking bolt 4 passes through the center of the blocking plate 3 and is aligned with the first through hole 11 of the fuser 1. At this time, turn the connecting cap of the socket wrench 7, and the socket wrench 7 Drive the locking bolt 4 to rotate, and the locking bolt 4 is screwed into the first through hole 11, thereby fixing the locking plate 2 to the end surface of the cage 1;

The third step is to implant the cage 1. After the locking plate 2 and the cage 1 are fixed, the bracket 61 clamps the locking plate 2 and the cage 1 and puts it between the vertebrae of the spine. Use a hammer to hit the connection at the top of the socket wrench 7. The cap implants the cage 1 in the correct position;

The fourth step is to fix the locking plate 2 to the vertebrae of the spine. First, fix one side of the locking plate 2. Hold the second handle 68 of the aimer 67 and push the aimer 67 into the limit groove 66 on one side of the bracket 61 until the aimer The front end of 67 reaches the end face of locking plate 2, and at this moment, the drill guide hole 69 corresponds to the third through hole 22, and a special tool is used to drill holes on the vertebrae of the spine through the drill guide hole 69 and the third through hole 22, and then the bone screw 5 Put the drilled hole 69 and the third through hole 22 into the drilled hole, and then use the screwdriver rod 8 to screw the bone screw 5 into the vertebrae through the drill hole 69 and the third through hole 22 to fix the locking plate. After 2 one side, take out the sight 67 from the limit slot 66 through the second handle 68, and then fix the other side of the locking plate 2 in the same way, and take out the installation mechanism 6 after the locking plate 2 is fixed;

The last step is to tighten the blocking piece 3, use a special tool to further rotate the blocking piece 3 at a small angle, so that the shielding end surface 32 of the blocking piece 3 covers the third through hole 22 of the locking plate 2, and then rivet the blocking piece 3 on the locking plate 2 The end face prevents the bone screw 5 from withdrawing.

Embodiment two

Referring to accompanying drawings 3, 4, 5 and 6 of the specification, it is another internal fixation system for lateral anterior fusion of the lumbar spine of the present invention, including fusion device 1, locking plate 2, blocking plate 3, locking Bolt 4, bone screw 5, installation mechanism 6, socket wrench 7 and screwdriver rod 8;

The end face of fusion device 1 is provided with a first through hole 11, and an internal thread is provided in the first through hole 11;

The center of the end surface of the locking plate 2 is provided with a second through hole 21, and the second through hole 21 is provided with an internal thread, and the two sides of the end surface of the locking plate 2 are respectively provided with a third through hole 22, and the two sides of the locking plate 2 are respectively provided with two limiters. Groove 23;

The baffle 3 is provided with a connecting end 31 and a shielding end face 32, the connecting end 31 and the shielding end face 32 are provided with a through central hole, the connecting end 31 is provided with an external thread matching the internal thread of the second through hole 21, and the two ends of the shielding end face 32 Narrow and long, when the blocking piece 3 is riveted to the end surface of the locking plate 2, the narrow and long ends of the shielding end surface 32 respectively cover the third through holes 22 on both sides of the locking plate 2;

The locking bolt 4 passes through the central hole of the blocking plate 3 and is screwed with the internal thread of the first through hole 11, and the nut of the locking bolt 4 is a hexagonal structure, and the size of the nut is larger than the central hole of the blocking plate 3;

The outer diameter of the bone screw 5 is smaller than the third through hole 22, and the locking plate 2 can be fixed to the vertebrae of the spine through the third through hole 22;

The mounting mechanism 6 includes a bracket 61. The front end of the bracket 61 is provided with a clamping portion 62 for clamping the locking plate 2. The clamping portion 62 is provided with a protrusion 63 that matches the limit groove 23 of the locking plate 2. The rear end of the bracket 61 is a first handle 64 is provided;

The center of the bracket 61 is provided with an axial through hole 65, and the locking bolt 4 can pass through the axial through hole 65;

Both sides of the axial through hole 65 of the bracket 61 are respectively provided with guide drill holes 69. When the clamping part 62 clamps the locking plate 2, the guide drill holes 69 correspond to the third through holes 22 of the locking plate 2, and the bone screw 5 passes through the guide holes 69. The drilling 69 and the third through hole 22 are rotated into the vertebrae of the spine;

The socket wrench 7 is longer than the bracket 61, and the outer diameter of the socket wrench 7 is smaller than the diameter of the axial through hole 65, and can move freely in the axial through hole 65. Matching hexagonal hollow structure, the rear end of the socket wrench 7 is provided with a connecting cap, and the outer diameter of the connecting cap is larger than the diameter of the axial through hole 65;

The outer diameter of the screwdriver rod 8 is smaller than the diameter of the drill guide hole 69, and the screwdriver rod 8 can rotate freely in the drill guide hole 69 for rotating the bone screw 5 into the spinal vertebrae.

According to this, when in use, the first step is to fix the blocking piece 3 and the locking plate 2, and screw the blocking piece 3 into the second through hole 21 of the locking plate 2 through a special tool. At this time, the locking plate 2 is not riveted, and the blocking piece 3 The blocking end surface 32 of the locking plate 2 deviates from the third through hole 22;

The second step is to fix the locking plate 2 and the cage 1, use the installation mechanism 6 to clamp the locking plate 2, hold the socket wrench 7 with the other hand and put it into the axial through hole 65 of the bracket 61, and place the locking bolt 4 in advance In the hexagonal hollow structure at the front end of the socket wrench 7, the locking bolt 4 passes through the center of the blocking plate 3 and is aligned with the first through hole 11 of the fuser 1. At this time, turn the connecting cap of the socket wrench 7, and the socket wrench 7 Drive the locking bolt 4 to rotate, and the locking bolt 4 is screwed into the first through hole 11, thereby fixing the locking plate 2 to the end surface of the cage 1;

The third step is to implant the cage 1. After the locking plate 2 and the cage 1 are fixed, the bracket 61 clamps the locking plate 2 and the cage 1 and puts it between the vertebrae of the spine. Use a hammer to hit the connection at the top of the socket wrench 7. The cap implants the cage 1 in the correct position;

The fourth step is to fix the locking plate 2 on the vertebrae of the spine. When the mounting mechanism 6 clamps the locking plate 2, the guide holes 69 on both sides of the axial through hole 65 correspond to the third through hole 22 of the locking plate 2 respectively. The tool drills holes on the vertebrae of the spine through the drill guide hole 69 and the third through hole 22, then puts the bone screw 5 into the drilled hole through the drill guide hole 69 and the third through hole 22, and then uses the screwdriver rod 8 Screw the bone screw 5 into the spinal vertebra through the drill guide hole 69 and the third through hole 22, and then fix the other side of the locking plate 2 in the same way, and take out the installation mechanism 6 after the locking plate 2 is fixed;

The last step is to tighten the blocking piece 3, use a special tool to further rotate the blocking piece 3 at a small angle, so that the shielding end surface 32 of the blocking piece 3 covers the third through hole 22 of the locking plate 2, and then rivet the blocking piece 3 on the locking plate 2 The end face prevents the bone screw 5 from withdrawing.

It is worth mentioning that, in the first and second embodiments, the fusion device 1 and the locking plate 2 are first fixed outside the body, and then the fusion device 1 and the locking plate 2 are implanted integrally. The fusion device 1 is implanted, and then the locking plate 2 and the fusion device 1 are fixed in the body through the installation mechanism 6 of the present utility model.

The above description shows and describes the preferred embodiments of the present utility model. As mentioned above, it should be understood that the present utility model is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various Various other combinations, modifications and environments can be made within the scope of the utility model concept described herein, through the above teachings or the technology or knowledge in the related field. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the utility model, and should all be within the protection scope of the appended claims of the utility model.

Claims (9)

1. a kind of lumbar vertebrae side anterior stabilization internal fixation system, including fusion device (1), lockplate (2), clamping screw (4), bone screws (5) and installing mechanism (6), the installing mechanism (6) include bracket (61), and bracket (61) front end is equipped with clamping part (62), It is characterized in that, bracket (61) center is equipped with axial pass-through holes (65), clamping part (62) side is equipped with and leads drilling (69)。

2. a kind of lumbar vertebrae side anterior stabilization internal fixation system according to claim 1, which is characterized in that the lockplate (2) end face center is equipped with the second through-hole (21), in the state that the installing mechanism (6) clamps the lockplate (2), the axial direction Through hole (65) is directed at second through-hole (21).

3. a kind of lumbar vertebrae side anterior stabilization internal fixation system according to claim 2, which is characterized in that the lockplate end Face two sides are respectively equipped with third through-hole (22), and the clamping part two sides of the bracket (61), which are respectively equipped with, leads drilling (69), the peace In the state that mounting mechanism (6) clamps the lockplate (2), the third through-hole led drilling (69) and be respectively aligned to lockplate (2) (22)。

4. a kind of lumbar vertebrae side anterior stabilization internal fixation system according to claim 3, which is characterized in that the lockplate (2) side is respectively equipped with two limiting grooves (23), and the clamping part (62) is equipped with and the lockplate limiting groove (23) The protrusion (63) matched.

5. a kind of lumbar vertebrae side anterior stabilization internal fixation system according to claim 4, which is characterized in that solid in the fusion Determining system further includes the box spanner (7) moveing freely in the axial pass-through holes (65), and box spanner (7) front end is equipped with With the matched hexagonal hollow structure of nut of clamping screw (4), rear end is equipped with attachment cap.

6. a kind of lumbar vertebrae side anterior stabilization internal fixation system according to claim 5, which is characterized in that solid in the fusion Determining system further includes screwdriver rod (8), and the screwdriver rod (8) leads drilling (69) and third through-hole (22) for bone screws by described (5) spinal vertebrae is screwed in.

7. a kind of lumbar vertebrae side anterior stabilization internal fixation system according to claim 6, which is characterized in that solid in the fusion Determining system further includes baffle (3), and the baffle (3) is first spirally connected with lockplate (2) to be riveted afterwards, and the baffle (3) is in riveting shape When state, the third through-hole (22) of baffle (3) covering lockplate two sides.

8. a kind of lumbar vertebrae side anterior stabilization internal fixation system according to claim 7, which is characterized in that second through-hole (21) it is equipped with internal screw thread, the baffle (3) is equipped with and connecting pin (31) and blocks end face (32), and the connecting pin (31) is equipped with the The matched external screw thread of two through-holes (21) internal screw thread, described end face (32) both ends of blocking are long and narrow, and the baffle (3) is in riveting status When, the long and narrow both ends for blocking end face (32) are covered each by the third through-hole (22) of lockplate (2) two sides.

9. a kind of lumbar vertebrae side anterior stabilization internal fixation system according to claim 8, which is characterized in that the bracket (61) Rear end is equipped with the first in command (64).