CN215130936U

CN215130936U - Lateral bone grafting fusion device and system thereof

Info

Publication number: CN215130936U
Application number: CN202022939021.3U
Authority: CN
Inventors: 菅凤增; 陈赞; 吴浩; 段婉茹; 王凯; 关健; 王兴文; 王作伟; 刘振磊
Original assignee: Guan Fengzeng
Current assignee: Guan Fengzeng
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-12-14
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a lateral bone grafting fusion cage and a system thereof, belonging to the technical field of orthopedic implants, wherein the lateral bone grafting fusion cage comprises a fusion cage main body with vertical through holes, a pair of transverse through holes communicated with the vertical through holes are arranged on the left side and the right side of the fusion cage main body, a left rotating plate and a right rotating plate are respectively arranged in the transverse through holes, and a moving block is arranged in the fusion cage main body; the front side wall and the rear side wall of the fusion cage main body are respectively provided with a mounting hole, a screw rod which can rotate in situ and is used for driving the moving block to move back and forth is arranged in the mounting hole, and the screw rod is used for driving the moving block to move, so that the left rotating plate and the right rotating plate can respectively extend out to the left side and the right side from the transverse through hole. The utility model discloses implant simply, multiplicable bone grafting area makes the cervical vertebra space around the fusion cage obtain rational utilization, can promote centrum side to fuse, and the bone fusion is effectual.

Description

Lateral bone grafting fusion device and system thereof

Technical Field

The utility model relates to an orthopedic implant technical field especially indicates a side bone grafting fuses ware and system thereof.

Background

Cervical fusion surgery is a common way to treat cervical spondylosis. The cervical vertebra fusion cage is generally trapezoidal or semicircular when viewed from the horizontal plane, a larger through hole is arranged in the middle for bone grafting, the more bone grafting amount in the fusion cage is, and the better the fusion effect of the upper vertebral body and the lower vertebral body after the operation is. In the operation, intervertebral discs between the vertebral bodies are cleaned, and a space is reserved for implanting a fusion device for bone grafting fusion. The gaps between the upper and lower vertebral bodies are distributed with high middle and low periphery, and in order to ensure the restoration of the original height of the human body, the proper height of the fusion cage can be selected only according to the height of the middle part of the vertebral body. Therefore, the remaining space around the cervical vertebrae is hardly reasonably utilized.

In the research process, through postoperative observation of a large number of cervical vertebra fusion operations, part of patients show that fusion occurs on the lateral side of the vertebral body (the bone grafting part on the outer side of the fusion cage) in a short period, and the bone grafting part in the fusion cage is not fused yet, so that the edge position of the cervical vertebra vertebral body is proved to be easier to fuse than the central position. However, if the baffle is directly added around the fusion cage, although the bone grafting area can be increased, the fusion cage is difficult to implant due to the small incision of the cervical vertebra operation, which is generally a minimally invasive operation.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a side bone grafting fusion cage and system that implant is simple, fuse effectually.

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

in one aspect, a lateral bone graft fusion cage is provided, which comprises a fusion cage body having a vertical through hole;

a pair of transverse through holes communicated with the vertical through holes are formed in the left side and the right side of the fusion cage main body, a left rotating plate and a right rotating plate are respectively arranged in the transverse through holes, the left rotating plate and the right rotating plate are both T-shaped, each T-shaped plate is provided with a transverse rod part and a vertical rod part, and the tail ends of the T-shaped vertical rod parts of the left rotating plate and the right rotating plate are hinged in the transverse through holes;

the fusion cage comprises a fusion cage body, a left rotating plate, a right rotating plate, a transverse through hole, a threaded rod and a movable block, wherein the fusion cage body is internally provided with the movable block for driving the left rotating plate and the right rotating plate to rotate in the transverse through hole;

the screw rod is used for driving the moving block to move, and the moving block pushes one end of the T-shaped transverse rod part of the left rotating plate and one end of the T-shaped transverse rod part of the right rotating plate to rotate around the hinged position of the T-shaped vertical rod part, so that the other end of the T-shaped transverse rod part of the left rotating plate and the other end of the T-shaped transverse rod part of the right rotating plate extend out of the transverse through hole towards the left side and the right side respectively.

Furthermore, the hinged position of the T-shaped vertical rod parts of the left rotating plate and the right rotating plate is positioned on the front side inside the transverse through hole.

Furthermore, the left end and the right end of the moving block are both provided with transverse sliding grooves, and the T-shaped cross rod parts of the left rotating plate and the right rotating plate are provided with guide rods inserted in the transverse sliding grooves.

Furthermore, the T-shaped cross rod parts of the left rotating plate and the right rotating plate are connected with the guide rod through a connecting rod in the middle, and a slide way matched with the connecting rod is arranged on the rear side wall of the transverse sliding groove.

Furthermore, an opening is formed in the upper portion or the lower portion of the end face of the outer side of the transverse sliding groove.

Furthermore, the maximum transverse extending distance of the T-shaped cross rod parts of the left rotating plate and the right rotating plate is 1-4 mm.

On the other hand, the fusion cage system comprises a fusion cage and a special instrument, wherein the fusion cage is the lateral bone grafting fusion cage, and the special instrument comprises a wrench inner core and a wrench outer sleeve sleeved on the wrench inner core;

the wrench inner core comprises a rod body, the front end of the rod body is used for being in driving connection with the screw, and a first handle is arranged at the rear end of the rod body;

the wrench outer sleeve comprises a sleeve, a pair of protruding pin shafts matched with the annular driving part are arranged at the front end of the sleeve, and a second handle is arranged at the rear end of the sleeve.

The utility model discloses following beneficial effect has:

the lateral bone grafting fusion cage and the system thereof have simple operation, can flexibly adjust the extension length of the left and right rotating plates in the fusion cage during operation, and can realize self-locking of the extension length; the bone grafting device is simple to implant, the bone grafting area can be increased, the cervical vertebra space around the fusion device can be reasonably utilized, the lateral fusion of the vertebral body can be promoted, and the bone fusion effect is good.

Drawings

FIG. 1 is a schematic view of the overall structure of the lateral bone grafting fusion cage of the present invention in an initial state;

FIG. 2 is a schematic view of the overall structure of the lateral bone graft fusion cage shown in FIG. 1 in a use state;

FIG. 3 is an exploded view of the lateral bone graft fusion cage shown in FIG. 1;

fig. 4 is a schematic view showing the matching relationship of the screw rod, the moving block and the left and right rotating plates in the lateral bone grafting fusion cage shown in fig. 1, wherein (a) corresponds to an initial state and (b) corresponds to a use state;

FIG. 5 is a schematic structural view illustrating a moving block in the lateral bone graft fusion cage shown in FIG. 1;

fig. 6 is a schematic overall structure diagram of a special apparatus in the fusion cage system of the present invention;

fig. 7 is a schematic view showing the combination of the special device shown in fig. 6 and the screw rod and the spicule shown in fig. 1, wherein (a) is a structural diagram before combination and (b) is a structural diagram after combination.

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.

On the one hand, the utility model provides a side bone grafting fuses ware, as shown in fig. 1-5, including fusing ware main part 1, fuse ware main part 1 has vertical through-hole 11, wherein:

the left side and the right side of the fusion cage main body 1 are provided with a pair of transverse through holes 12 communicated with the vertical through hole 11, a left rotating plate 2 and a right rotating plate 3 are respectively arranged in the transverse through holes 12, the left rotating plate 2 and the right rotating plate 3 are both T-shaped, the T-shape is provided with

transverse rod parts

21 and 31 and

vertical rod parts

22 and 32, and the tail ends of the T-shaped

vertical rod parts

22 and 32 of the left rotating plate 2 and the right rotating plate 3 are hinged (particularly can be connected by a pin 15) in the transverse through holes 12;

a moving block 4 for driving the left rotating plate 2 and the right rotating plate 3 to rotate in the transverse through hole 12 is arranged in the fusion cage main body 1, mounting

holes

13 and 14 are formed in the front side wall and the rear side wall of the fusion cage main body 1, screw rods 5 which can rotate in situ (namely, can be stopped axially and can rotate circumferentially) and are used for driving the moving block 4 to move back and forth are arranged in the

mounting holes

13 and 14, and through threaded holes 40 matched with the screw rods 5 are formed in the moving block 4;

the screw 5 drives the moving block 4 to move, and the moving block 4 pushes one ends of the T-shaped

cross rod parts

21 and 31 of the left rotating plate 2 and the right rotating plate 3 to rotate around the hinged joint of the T-shaped

vertical rod parts

22 and 32, so that the other ends of the T-shaped

cross rod parts

21 and 31 of the left rotating plate 2 and the right rotating plate 3 respectively extend out of the transverse through hole 12 to the left side and the right side.

During the use, the utility model discloses a side bone grafting fuses ware is at first in the shrink state (left and right rotating

plate

2, 3 shrink in the fusion ware) that figure 1 is shown, treat to implant human back, utilize apparatus drive screw 5 to rotate, screw 5 drive movable block 4 removes, movable block 4 promotes the T-shaped horizontal pole portion 21 of left rotating plate 2 and right rotating plate 3, the one end of 31 rotates around T-

shaped montant portion

22, 32's articulated department, make the T-shaped horizontal pole portion 21 of left rotating plate 2 and right rotating plate 3, the other end of 31 stretches out to the left and right sides respectively in horizontal through-hole 12, thereby make the fusion ware become the extension state that figure 2 shows.

The utility model discloses following beneficial effect has:

1. the utility model can realize the change of the fusion cage between the contraction state and the extension state by rotating the screw rod through the instrument, and has simple operation;

2. the screw rod is in threaded connection with the moving block, the stress is stable, and the self-locking of the extension length can be realized after the left and right rotating plates extend for a certain distance;

3. the left and right rotating plates are telescopic, when the fusion cage is implanted, the left and right rotating plates are in a telescopic state, the volume of the fusion cage cannot be increased, the fusion cage can be implanted according to the existing mode, and implantation difficulty cannot be caused; after the fusion cage is implanted, the left and right rotating plates are in an extended state, so that the bone grafting area (lateral bone grafting) can be increased, broken bones outside the fusion cage are prevented from sliding into a posterior vertebral canal, the cervical vertebral space around the fusion cage is reasonably utilized, and the lateral fusion of a vertebral body can be promoted;

4. when the left and right rotating plates are in an extending state, the transverse length of the fusion cage is increased, and the anti-rotation capacity is stronger.

In conclusion, the lateral bone grafting fusion cage of the utility model has simple operation, can flexibly adjust the extension length of the left and right rotating plates in the fusion cage during operation, and can realize self-locking of the extension length; the bone grafting device is simple to implant, the bone grafting area can be increased, the cervical vertebra space around the fusion device can be reasonably utilized, the lateral fusion of the vertebral body can be promoted, and the bone fusion effect is good. The utility model discloses mainly used cervical vertebra operation fuses ware and implants the side of being convenient for after implanting and plant the bone.

Preferably, the hinged position of the T-shaped

vertical rod parts

22 and 32 of the left rotating plate 2 and the right rotating plate 3 is located at the front side inside the transverse through hole 12, so that the T-shaped

cross rod parts

21 and 31 of the left rotating plate 2 and the right rotating plate 3 are located at the rear side of the fusion cage and extend outwards from the rear side of the fusion cage, which is more practical.

The movable block 4 can be used for driving the left rotating plate 2 and the right rotating plate 3 in various ways which can be easily thought by those skilled in the art, for example, the left end and the right end of the movable block are both inclined planes, and an inclined plane matching driving way is adopted, however, in order to improve the driving stability, the left end and the right end of the movable block 4 can be both provided with the transverse sliding grooves 41, the T-shaped

transverse rod parts

21 and 31 of the left rotating plate 2 and the right rotating plate 3 are provided with the

guide rods

23 and 33 inserted in the transverse sliding grooves 41, so that the left rotating plate 2 and the right rotating plate 3 can be prevented from being separated from the transverse through holes 12 through the transverse sliding grooves 41 and the

guide rods

23 and 33, and the driving is more stable.

The connection between the left and right rotating

plates

2, 3 and the

guide rods

23, 33 can be at the upper part, middle part or lower part, and the connection mode can adopt key connection, pin connection and adhesion, etc., however, for the convenience of implementation, the T-shaped

cross rod parts

21, 31 of the left and right

rotating plates

2, 3 and the

guide rods

23, 33 can be connected at the middle part through the connecting

rods

24, 34, and the rear side wall of the transverse sliding chute 41 is provided with a slideway 42 matched with the connecting

rods

24, 34. In this way, the

links

24 and 34 are engaged with the slide rail 42 to prevent the left and

right rotation plates

2 and 3 from shaking up and down during the movement. At this time, in order to facilitate the insertion and installation of the

guide rods

23 and 33 of the left and right

rotating plates

2 and 3 in the lateral sliding groove 41, an opening may be provided at an upper portion or a lower portion of an outer end surface of the lateral sliding groove 41 (an opening is provided at a lower portion in the embodiment shown in the drawings).

The maximum lateral extension distance of the left and

right rotation plates

2 and 3 may be set as desired, and the maximum lateral extension distance of the left and

right rotation plates

2 and 3 may be 1-4mm, for example, 2mm, 3mm, etc., in consideration of the size of the cervical vertebrae.

In the present invention, when the screw 5 drives the moving block 4 to move, in order to realize the original place rotation of the screw 5 without dislocation, various ways that can be easily conceived by those skilled in the art can be adopted, for example, a blocking arm is extended in the fusion cage body 1 to block the screw 5 in the axial direction without blocking the moving block 4, however, the following structural form is preferably adopted in consideration of the comprehensive consideration:

as shown in fig. 3, a screw shaft sleeve 16 is arranged in the mounting hole 14 of the rear side wall of the fusion cage body 1, and the tail part of the screw 5 is a polish rod and is positioned in the screw shaft sleeve 16;

in order to facilitate the operation of the screw rod 5, an instrument operation hole 51 may be formed on the outer end surface of the head of the screw rod 5, and the instrument operation hole 51 may be a hexagonal hole.

The mounting hole 13 of the front side wall of the cage body 1 may be a stepped hole, so that the head of the screw 5 is hidden in the stepped hole, the head of the screw is prevented from protruding to the outside of the cage, and the tissue irritation is reduced.

The inventor finds that in the prior art, as cervical vertebra fusion generally needs to completely or mostly remove the focus intervertebral disc, certain requirements are required on the stability of an operation part after the fusion device is implanted, namely, the fusion device is required to be prevented from falling off, and the currently common fusion device with a nail plate is easy to cause discomfort symptoms such as dysphagia, foreign body sensation and the like after the operation of a patient due to non-zero incisura. To solve this problem, as shown in fig. 1 to 3, a pair of spicules 6 (specifically, a triangular needle) which can be driven to rotate by an instrument and can be extended and retracted may be provided on both sides of the front sidewall of the fusion cage body 1.

Preferably, the spicule 6 comprises a cylindrical body 61 and a circular driving part 62 positioned at the head of the cylindrical body 61;

the both sides of the front side wall of the fusion cage main body 1 can be provided with a left sliding chute 8 and a right sliding chute 9 which are vertically penetrated and used for accommodating the spicules 6, the left sliding chute 8 and the right sliding chute 9 respectively comprise through hole parts 81 and 91 used for accommodating the cylindrical body 61 and sliding chute parts 82 and 92 used for accommodating the circular driving part 62, and the sliding chute parts 82 and 92 are provided with openings for instrument operation.

As shown, the spicules 6 may be arranged in a centrosymmetric manner, i.e. the spicules 6 may be placed top up and bottom down in the left runner 8 and the spicules 6 may be placed top down and bottom up in the right runner 9.

When the fusion cage body 1 reaches the designated implantation position, an instrument is used to penetrate through the opening operated by the instrument in the left and right sliding grooves and is inserted into the circular driving parts 62 of the left and right spicules 6, the instrument is rotated clockwise, the circular driving parts 62 of the left and right spicules 6 move up and down in the sliding groove parts 82 and 92 of the left and right sliding grooves, the two spicules can penetrate out of the through hole parts 81 and 91 of the left and right sliding grooves, and the spicules 6 are inserted into the vertebral endplate, so that the fusion cage is prevented from being pulled out and fixed.

Like this, through the mode of adopting about spicule and controlling spout matched with, this mode is zero incisura, can not cause patient's postoperative to have uncomfortable symptoms such as dysphagia and foreign body sensation to can play further fixed integration ware, prevent the effect that the integration ware deviates from.

In another aspect, the present invention provides a fusion cage system, as shown in fig. 1-7, comprising a fusion cage and a special apparatus, wherein:

the fusion cage is the lateral bone grafting fusion cage, has the same structure as the lateral bone grafting fusion cage, and is not described again;

the special instrument comprises a wrench inner core 100 and a wrench outer sleeve 200 sleeved on the wrench inner core 100;

the wrench inner core 100 comprises a rod body 101, the front end (which can be a hexagonal bulge) of the rod body 101 is used for driving the connecting screw rod 5, and the rear end of the rod body 101 is provided with a first handle 102;

the wrench outer sleeve 200 comprises a sleeve 201, a pair of protruding pin shafts 202 matched with the circular driving parts 62 and 72 are arranged at the front end of the sleeve 201, and a second handle 204 is arranged at the rear end of the sleeve 201.

In the embodiment shown in the figures, the wrench inner core 100 can rotate in the wrench outer sleeve 200, when in use, the wrench inner core 100 is abutted with the instrument operation hole 51 on the outer end face of the head of the screw rod 5, the pair of protruding pin shafts 202 at the front end of the wrench outer sleeve 200 is inserted into the circular driving parts 62 of the left and right spicules after passing through the opening for instrument operation in the left and right chutes, the first handle 102 is rotated clockwise to drive the screw rod 5, the screw rod 5 drives the moving block 4 to move, and the moving block 4 pushes one ends of the T-shaped cross rod parts 21 and 31 of the left and right rotating plates 2 and 3 to rotate around the hinge joint of the T-shaped vertical rod parts 22 and 32, so that the other ends of the T-shaped cross rod parts 21 and 31 of the left and right rotating plates 2 and 3 respectively extend to the left and right from the transverse through hole 12; the second handle 204 is rotated clockwise, so that the circular ring-shaped driving parts 62 of the left and right spicules can move up and down in the sliding groove parts 82 and 92 of the left and right sliding grooves, the spicules 6 can penetrate out from the through hole parts 81 and 91 of the left and right sliding grooves, and the spicules 6 are inserted into the vertebral body end plates.

The fusion cage system of the utility model is a lateral bone grafting fusion cage, and is convenient to operate by means of special instruments, on one hand, the left and right rotating plates in the fusion cage can respectively extend out to the left and right sides from the transverse through hole; on the other hand, the spicules can be extended from the top and the bottom of the left and right chutes. The utility model can increase the bone grafting area (lateral bone grafting), to make the cervical vertebra space around the fusion device reasonably utilized, and promote the fusion of the lateral side of the vertebral body.

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

1. A lateral bone grafting fusion cage comprises a fusion cage main body, the fusion cage main body is provided with a vertical through hole, and is characterized in that,

2. The lateral bone graft fusion device of claim 1, wherein the joint of the T-shaped vertical rod portions of the left and right rotating plates is located at the inner front side of the transverse through hole.

3. The lateral bone grafting fusion cage according to claim 1, wherein the moving block is provided at both left and right ends thereof with lateral sliding grooves, and the T-shaped cross bar portions of the left and right rotating plates are provided with guide rods inserted in the lateral sliding grooves.

4. The lateral bone grafting fusion cage according to claim 3, wherein the T-shaped cross bar part and the guide bar of the left and right rotating plates are connected at the middle part by a connecting bar, and the rear side wall of the transverse sliding groove is provided with a slideway matched with the connecting bar.

5. The lateral bone graft fusion device according to claim 4, wherein an opening is provided at an upper or lower portion of an outer end surface of the lateral sliding groove.

6. The lateral bone graft fusion device of claim 1, wherein the maximum lateral extension distance of the T-shaped crossbar portions of the left and right rotating plates is 1-4 mm.

7. The lateral bone grafting fusion cage according to claim 1, wherein a screw shaft sleeve is arranged in the mounting hole of the rear side wall of the fusion cage body, and the tail part of the screw is a polished rod and is positioned in the screw shaft sleeve; an instrument operation hole is formed in the outer end face of the head of the screw rod.

8. The lateral bone graft fusion device according to any one of claims 1 to 7, wherein a pair of retractable bone pins rotatably driven by an instrument are provided on both sides of the anterior side wall of the fusion device body.

9. The lateral bone graft fusion device of claim 8, wherein the spicule comprises a cylindrical body and a circular ring shaped driving part located at the head of the cylindrical body;

fuse the preceding lateral wall both sides of ware main part and be equipped with vertical link up and be used for holding the left spout and the right spout of spicule, left side spout and right spout all include the spout portion that is used for holding the through-hole portion of cylindricality body and is used for holding ring shape drive division, spout portion has the opening that supplies the apparatus operation.

10. A fusion cage system, which comprises a fusion cage and a special instrument, wherein the fusion cage is the lateral bone grafting fusion cage of claim 9, and the special instrument comprises a wrench inner core and a wrench outer sleeve sleeved on the wrench inner core;