CN107115140A - One kind is used for backbone and strengthens pedicle screw internal fixation device - Google Patents

Abstract

A pedicle screw internal fixation device for spinal column reinforcement, comprising a pedicle screw, an expansion fixation sheath and a head film sheath, the expansion fixation sheath includes an expansion fixation sheath body and a set on the head of the expansion fixation sheath body The first expansion sheet, the second expansion sheet and the third expansion sheet, the first expansion sheet is provided with the left insertion hole of the first expansion sheet membrane rod, the first expansion sheet membrane sleeve slot and the first expansion sheet membrane rod right insertion hole, The second expansion sheet is provided with the left socket of the second expansion sheet membrane rod, the slot of the second expansion sheet membrane sleeve and the right socket of the second expansion sheet membrane rod, and the third expansion sheet is provided with the left socket of the third expansion sheet membrane rod , The slot of the third expansion sheet membrane sleeve and the right socket of the third expansion sheet membrane rod, so the expansion fixation sleeve is firmly fixed on the spine, so that the pedicle screws are also installed more firmly to avoid loosening of the pedicle screws. Fixed unreliable situations.

Description

A kind of internal fixation device for spinal column strengthening pedicle screw

technical field

The invention relates to an internal fixation device for spinal column reinforcing pedicle screws.

Background technique

Spinal fractures, spinal tumors, cervical spondylosis, cervical spinal stenosis, lumbar disc herniation, lumbar spinal stenosis, lumbar segmental instability, lumbar slippage and other diseases are very common in clinical practice. These diseases can cause pain, inability to stand, neck and shoulder pain, low back pain, pain and numbness of lower limbs, intermittent claudication, and even clinical symptoms of defecation and sexual dysfunction, which seriously affect the life, health and quality of life of patients. Treatment of these patients often requires spinal immobilization techniques.

In 1959, Boucher et al first applied pedicle screw fixation to the spine. In 1970, clinical cases were reported successively in France and Switzerland. Since the 1980s, pedicle screw instruments have been widely accepted through continuous improvement. Chi Yonglong et al. used this technology for upper thoracic spine fixation, and later developed cervical pedicle screw fixation technology, which has become the most routine in spinal surgery. of a technology.

With the continuous development of the operation, more and more complications have been found, one of which is that the screw is loose, the fixation is not firm, or the position of the screw is not good for the first time during the operation, and it cannot be adjusted. Difficult, the screw cannot be removed after the bone cement is driven in. Especially for patients with osteoporosis, it is more difficult to adjust the screw, and the holding force of the screw is worse. Once it is misplaced, it is difficult to adjust.

Contents of the invention

The technical problem to be solved by the present invention is to provide an internal fixation device for spinal reinforcement pedicle screws that enhances the fixation effect of spinal pedicle screws and is easy to adjust and take out.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: an internal fixation device for spinal reinforcement pedicle screws, including pedicle screws, including an expansion fixation sleeve and a head membrane sleeve, and the head membrane sleeve is used for The head of the sealing expansion fixing sleeve, the pedicle screw includes a pedicle screw fixing thread section and a pedicle screw fixing seat, and the pedicle screw fixing seat is provided with a pedicle screw fixing seat threaded hole and a vertebra The pedicle screw fixing seat is connected with a slot hole, the threaded hole of the pedicle screw fixing seat is provided with a countersunk fixing nut, the expansion fixing sleeve is provided with a threaded hole, and the pedicle screw fixing thread section and the thread holes, the expansion fixing sleeve includes an expansion fixing sleeve body and a first expansion sheet, a second expansion sheet and a third expansion sheet arranged on the head of the expansion fixing sleeve body, the first expansion sheet, the second expansion sheet The expansion sheet and the third expansion sheet can be stretched outwards and cooperate with each other. The first expansion sheet is provided with the left insertion hole of the first expansion sheet membrane rod, the first expansion sheet membrane sleeve slot and the first expansion sheet membrane. The right socket of the rod, the second expansion sheet is provided with the left socket of the second expansion sheet membrane rod, the second expansion sheet membrane sleeve slot and the right socket of the second expansion sheet membrane rod, and the third expansion sheet is provided with The left socket of the third expansion film rod, the third expansion film sleeve slot and the right insertion hole of the third expansion film rod. A left insertion rod, a first right insertion rod, a second left insertion rod, a second right insertion rod, a third left insertion rod and a third right insertion rod, wherein the first left insertion rod is inserted in the first expansion sheet In the left socket of the membrane rod, the first right insertion rod is inserted in the right socket of the first expansion film rod, and the second left insertion rod is inserted in the left socket of the second expansion film rod. The second right insertion rod is inserted into the right insertion hole of the second expansion sheet membrane rod, the third left insertion rod is inserted in the left insertion hole of the third expansion sheet membrane rod, and the third right insertion rod is inserted into the In the right insertion hole of the third expansion film rod, the sealing film sleeve is inserted into the first expansion film sleeve slot, the second expansion film sleeve slot and the third expansion film sleeve slot, so that the first expansion film The gap between the sheet and the second expansion sheet, the gap between the second expansion sheet and the third expansion sheet, the gap between the third expansion sheet and the first expansion sheet, the first expansion sheet, the second expansion sheet and the first expansion sheet The through hole between the three expansion sheets is sealed, and when the pedicle screw fixing threaded section completely enters the threaded hole to stretch the first expansion sheet, the second expansion sheet and the third expansion sheet outward, the first left insertion rod 1. The first right inserting rod, the second left inserting rod, the second right inserting rod, the third left inserting rod and the third right inserting rod drive the sealing film sleeve to stretch and continue to keep the seal.

The beneficial effect of the internal fixation device for spinal reinforcement pedicle screws provided by the present invention is that: because it includes pedicle screws, it includes an expansion fixation sleeve and a head membrane sleeve, and the head membrane sleeve is used to seal the expansion fixation sleeve The head, the pedicle screw includes a pedicle screw fixing thread segment and a pedicle screw fixing seat, and the pedicle screw fixing seat is provided with a pedicle screw fixing seat threaded hole and a pedicle screw fixing seat. The seat is connected with a slot hole, the threaded hole of the pedicle screw fixing seat is provided with a countersunk fixing nut, the expansion fixing sleeve is provided with a threaded hole, and the fixed threaded section of the pedicle screw is matched with the threaded hole, The expansion fixing sleeve includes an expansion fixing sleeve body and a first expansion sheet, a second expansion sheet and a third expansion sheet arranged on the head of the expansion fixing sleeve body, the first expansion sheet, the second expansion sheet and the first expansion sheet The three expansion sheets can be stretched outwards and cooperate with each other. The first expansion sheet is provided with the left socket of the first expansion sheet membrane rod, the slot of the first expansion sheet membrane sleeve and the right insertion hole of the first expansion sheet membrane rod. , the second expansion sheet is provided with the second expansion sheet membrane rod left socket, the second expansion sheet sleeve slot and the second expansion sheet membrane rod right insertion hole, and the third expansion sheet is provided with a third expansion sheet The left insertion hole of the membrane rod, the slot of the third expansion sheet membrane sleeve and the right insertion hole of the third expansion sheet membrane rod, the head membrane sleeve includes a sealing membrane sleeve and a first left insertion rod arranged on the side of the sealing membrane sleeve , the first right inserting rod, the second left inserting rod, the second right inserting rod, the third left inserting rod and the third right inserting rod, wherein the first left inserting rod is inserted in the left inserting rod of the first expansion film In the hole, the first right insertion rod is inserted in the right insertion hole of the first expansion film rod, the second left insertion rod is inserted in the left insertion hole of the second expansion film rod, and the second right The insertion rod is inserted in the right insertion hole of the second expansion sheet membrane rod, the third left insertion rod is inserted in the left insertion hole of the third expansion sheet membrane rod, and the third right insertion rod is inserted in the third expansion sheet In the right insertion hole of the film rod, the sealing film sleeve is inserted into the first expansion film film sleeve slot, the second expansion film film sleeve slot and the third expansion film film sleeve slot, so that the first expansion film and the second expansion film The gap between the expansion sheets, the gap between the second expansion sheet and the third expansion sheet, the gap between the third expansion sheet and the first expansion sheet, the gap between the first expansion sheet, the second expansion sheet and the third expansion sheet When the pedicle screw fixing threaded section completely enters the threaded hole to stretch the first expansion piece, the second expansion piece and the third expansion piece outward, the first left insertion rod, the first right insertion rod The inserting rod, the second left inserting rod, the second right inserting rod, the third left inserting rod and the third right inserting rod drive the sealing film sleeve to stretch and continue to keep the seal,

Therefore, when in use, the expansion fixation sleeve is first put into the spine, and then the pedicle screw is screwed in. After the pedicle screw fixing thread section of the pedicle screw enters the threaded hole of the expansion fixation sleeve completely, the first expansion piece, the second The expansion piece and the third expansion piece are stretched outward, and at the same time, the first left insertion rod, the first right insertion rod, the second left insertion rod, the second right insertion rod, the third left insertion rod and the third right insertion rod drive the seal The stretching of the membrane sleeve continues to keep the seal, so that the expansion fixation sleeve is firmly fixed on the spine, so that the pedicle screws are also installed more firmly, avoiding the occurrence of loosening of the pedicle screws and unreliable fixation, which occurs for the first time during the operation. If the position of the screw is not good, if you feel uncomfortable after the screw is placed, you only need to rotate the pedicle screw to withdraw it, which makes the adjustment and disassembly more convenient. Isolated, the bone cement is only in contact with the expansion fixation sleeve and the head membrane sleeve, and the bone cement will not be in direct contact with the pedicle screw, so that the first expansion piece, the second expansion piece and the third expansion piece on the expansion fixation sleeve are realized. It can be stretched to strengthen the fixation effect, and at the same time, it can prevent the bone cement from entering the expansion fixation sleeve and contacting the pedicle screw, avoiding the problem that the pedicle screw cannot be taken out, especially for osteoporosis patients, the adjustment of the pedicle screw is more convenient Convenient, the pedicle screw fixation is more firm, when the upper and lower two pedicle screws need to be connected, just insert the connecting rod into the connecting groove hole of the pedicle screw fixing seat, and tighten and fix it through the pedicle screw fixing seat, It makes the connection of the upper and lower two pedicle screws more convenient.

Further, the left insertion hole of the first expansion sheet membrane rod, the right insertion hole of the first expansion sheet membrane rod, the left insertion hole of the second expansion sheet membrane rod, the right insertion hole of the second expansion sheet membrane rod, the third expansion sheet membrane The depths of the left insertion hole of the rod and the right insertion hole of the third expansion film rod are the same, and the depths of the first expansion film sleeve slot, the second expansion film sleeve slot and the third expansion film sleeve slot are the same, The left socket of the first expansion film rod, the right socket of the first expansion film rod, the left socket of the second expansion film rod, the right socket of the second expansion film rod, and the left socket of the third expansion film rod The depth of the hole and the right insertion hole of the third expansion sheet film rod is greater than the depth of the first expansion sheet film sleeve slot, the second expansion sheet film sleeve slot and the third expansion sheet film sleeve slot, and the first expansion sheet The depths of the membrane sleeve slots, the second expansion sheet membrane sleeve slots and the third expansion sheet membrane sleeve slots account for less than half of the lengths of the first expansion sheet, the second expansion sheet and the third expansion sheet respectively. This structure makes the expansion The gap on the head of the fixed sleeve is greatly reduced, so that the sealing area of the head membrane sleeve is reduced, so that the sealing effect is better, and the bone cement is prevented from entering the expansion fixed sleeve.

Further, the expansion fixation sleeve is provided with a first bone cement injection channel, a second bone cement injection channel and a third bone cement injection channel, and the first bone cement injection channel includes the entrance of the first bone cement injection channel and the second bone cement injection channel. A bone cement injection channel outlet, the second bone cement injection channel includes a second bone cement injection channel inlet and a second bone cement injection channel outlet, and the third bone cement injection channel includes a third bone cement injection channel inlet and a second bone cement injection channel Three bone cement injection channel outlets, the first bone cement injection channel, the second bone cement injection channel and the third bone cement injection channel correspond to the positions of the first expansion sheet, the second expansion sheet and the third expansion sheet respectively, so The entrance of the first bone cement injection channel, the entrance of the second bone cement injection channel and the entrance of the third bone cement injection channel are arranged on the rear end surface of the expansion fixation sleeve, and the outlet of the first bone cement injection channel is arranged outside the first expansion sheet On the side, and located in the second half of the first expansion sheet, the outlet of the second bone cement injection channel is arranged on the outer surface of the second expansion sheet, and located in the second half of the second expansion sheet, the third bone cement The outlet of the injection channel is set on the outer surface of the third expansion sheet, and is located in the second half of the third expansion sheet. Since the bone cement hardens relatively quickly, if the bone cement is first injected into the spine, and then the expansion set is inserted, the expansion fixation The bonding effect between the sleeve and the bone cement will not be good, so the expansion fixation sleeve is installed first, and then the bone cement is injected through the first bone cement injection channel, the second bone cement injection channel and the third bone cement injection channel, so that the expansion The fixation sleeve and the bone cement are more firmly bonded, and the first bone cement injection channel, the second bone cement injection channel and the third bone cement injection channel of this structure are evenly distributed, and the injected bone cement adheres to the head of the expansion fixation sleeve. The connection is also more uniform, so that the expansion fixation sleeve and the bone cement are bonded more firmly, and the outlet of the first bone cement injection channel is arranged on the outer surface of the first expansion sheet, and is located in the second half of the first expansion sheet. The outlet of the second bone cement injection channel is arranged on the outer surface of the second expansion sheet and is located in the second half of the second expansion sheet, and the outlet of the third bone cement injection channel is arranged on the outer surface of the third expansion sheet and is located on the second half of the second expansion sheet. The second half of the three expansion pieces prevents the bone cement from entering the expansion fixation sleeve, realizes easy injection of the bone cement, and at the same time avoids the contact between the bone cement and the pedicle screw, preventing the pedicle screw from being difficult to adjust and take out.

Further, it includes a bone cement injection expansion fixation sleeve withdrawal device, the bone cement injection expansion fixation sleeve withdrawal device includes a syringe and a piston, the syringe and the piston are matched, and the middle part of the bottom of the syringe is provided with a circular Positioning column, the circumference of the circular positioning column at the bottom of the injection cylinder is provided with a first injection tube, a second injection tube and a third injection tube, and a plurality of positioning rods are provided on the circumference of the bottom of the injection cylinder. The bottom of the injection cylinder between the injection tube and the second injection tube is provided with a first withdrawal fixing seat, and the bottom of the injection cylinder between the second injection tube and the third injection tube is provided with a second withdrawal fixing seat. The bottom of the syringe between the third injection tube and the first injection tube is provided with a third withdrawing fixing seat, the first withdrawing fixing seat is provided with a first pull hook, and the second withdrawing fixing seat is provided with a second Draw hook, the third draw hook is provided with the third draw hook on the fixing seat, and the first hang hole, the second hang hole and the third hang hole are set on the side wall of the injection cylinder, and the first draw hook can be bent to hook The head is hung on the first hanging hole, the second pull hook can be bent to hang the hook head on the second hanging hole, the third pull hook can be bent to hang the hook head on the third hanging hole, and the expansion fixing sleeve The first injection tube head placement hole, the second injection tube head placement hole and the third injection tube head placement hole are provided on the rear end surface of the expansion sleeve, and a plurality of positioning jacks are provided on the periphery of the rear end surface of the expansion fixing sleeve. , the circular positioning column can be inserted into the threaded hole, the positioning rod can be inserted into the positioning socket, the first injection tube, the second injection tube and the third injection tube can be inserted into the first bone cement injection channel entrance, the second injection tube respectively Two bone cement injection channel entrances and a third bone cement injection channel entrance, the first injection tube, the second injection tube and the third injection tube can be respectively inserted into the first injection tube head placement hole, and the second injection tube head placement hole hole and the head of the third injection tube to place the hole, the first retractor, the second retractor and the third retractor can be respectively inserted into the first bone cement injection channel, the second bone cement injection channel and the third bone cement injection channel, and the second The hook heads of the first retractor, the second retractor and the third retractor can be hooked respectively from the outlet of the first bone cement injection channel, the second bone cement injection channel and the third bone cement injection channel. The bone cement injection expansion fixation sleeve exit device makes the bone cement injection more convenient. Only one injection is needed, that is, the bone cement is injected into the first bone cement injection channel, the second bone cement injection channel and the third bone cement injection channel, avoiding three injections. If the implanted expansion fixation sleeve is uncomfortable and needs to be taken out, just insert the first bone cement injection channel entrance, the second bone cement injection channel entrance and the third bone cement injection channel through the first retractor hook, the second retractor hook and the third retractor hook respectively entrance, and then the hook heads of the first retractor, the second retractor and the third retractor protrude from the outlet of the first bone cement injection channel, the outlet of the second bone cement injection channel and the outlet of the third bone cement injection channel respectively to fix the expansion The sleeve can be taken out, which makes it more convenient to disassemble the expansion fixation sleeve. When the bone cement is injected, the hook head of the first retractor is hung on the first hanging hole, and the hook head of the second retractor is hung on the second hanging hole. , the hook head of the third pull hook hangs on the third Hanging hole, which can avoid hindering the bone cement injection operation, and the circular positioning post is inserted into the threaded hole, and the positioning rod is inserted into the positioning socket, so that the stability is better when the bone cement is injected, and shaking is avoided. When taking the expansion set , Rotate the ejection device of the bone water 1959 mud injection expansion fixation sleeve by one position, let the first injection tube, the second injection tube and the third injection tube be inserted into the first injection tube head placement hole and the second injection tube head placement hole respectively and the third injection tube head are placed in the hole, and the positioning rod is inserted into another positioning socket, so as to avoid hindering the withdrawal operation of the expansion fixing sleeve.

Further, the first expansion sheet, the second expansion sheet and the third expansion sheet are provided with a plurality of locking hooks, and the outer surfaces of the front ends of the first expansion sheet, the second expansion sheet and the third expansion sheet are sloped. The setting, wherein the setting of the locking hook makes the installation of the expansion fixing sleeve more firm, and the setting of the slope makes the installation of the expansion fixing sleeve easier.

The internal fixation device for spinal column reinforcing pedicle screws provided by the present invention will be further described below with reference to the drawings and specific embodiments.

Description of drawings

Fig. 1 is a kind of structural representation of the pedicle screw, the expansion fixation sleeve and the head membrane sleeve used for the spinal reinforcement pedicle screw internal fixation device provided by the present invention;

Fig. 2 is a schematic structural view of a pedicle screw used for spinal reinforcement pedicle screw internal fixation provided by the present invention;

Fig. 3 is one of the structural schematic diagrams of an expansion fixation sleeve used in the spinal reinforcement pedicle screw internal fixation device provided by the present invention;

Fig. 4 is the second structural schematic diagram of an expandable fixation sleeve used in the spinal reinforcement pedicle screw internal fixation device provided by the present invention;

Fig. 5 is one of the structural schematic diagrams of a head membrane sleeve used for spinal reinforcement pedicle screw internal fixation device provided by the present invention;

Fig. 6 is the second structural schematic diagram of a head membrane sleeve used for spinal reinforcement pedicle screw internal fixation device provided by the present invention;

Fig. 7 is one of the structural schematic diagrams of a bone cement injection expansion fixation sleeve withdrawing device used for spinal reinforcement pedicle screw internal fixation device provided by the present invention and the expansion fixation sleeve;

Fig. 8 is the second schematic diagram of the structure of a bone cement injection expansion fixation sheath ejection device and the expansion fixation sheath used in the spinal reinforcement pedicle screw internal fixation device provided by the present invention;

Fig. 9 is one of the structural schematic diagrams of a bone cement injection expansion fixation sleeve withdrawal device used for spinal reinforcement pedicle screw internal fixation device provided by the present invention;

Fig. 10 is the second structural schematic diagram of a bone cement injection expansion fixation sleeve ejection device used in the spinal reinforcement pedicle screw internal fixation device provided by the present invention;

Fig. 11 is the third schematic diagram of the structure of a bone cement injection expansion fixation sleeve ejection device used in the spinal reinforcement pedicle screw internal fixation device provided by the present invention.

detailed description

As shown in Figures 1 to 11, the present invention provides an embodiment of a spinal reinforcement pedicle screw internal fixation device, which includes a pedicle screw 1, an expansion fixation sleeve 2 and a head membrane sleeve 3. The head membrane cover 3 is used to seal the head of the expansion and fixation sleeve 2, and the pedicle screw 1 includes a pedicle screw fixing thread section 4 and a pedicle screw fixing seat 5, and the pedicle screw fixing seat 5 The pedicle screw fixing seat threaded hole 6 and the pedicle screw fixing seat connecting slot hole 7 are provided, the pedicle screw fixing seat threaded hole 6 is provided with a countersunk fixing nut 8, and the expansion fixing sleeve 2 is provided with a threaded hole 9, the pedicle screw fixing threaded section 4 is matched with the threaded hole 9, and the expansion and fixation sleeve 2 includes an expansion and fixation sleeve body 10 and an expansion and fixation sleeve body 10 head. The first expansion sheet 11, the second expansion sheet 12 and the third expansion sheet 13, the first expansion sheet 11, the second expansion sheet 12 and the third expansion sheet 13 can be stretched outwards and cooperate with each other. The first expansion sheet 11 is provided with the left socket 14 of the first expansion sheet membrane rod, the first expansion sheet membrane sleeve slot 15 and the right insertion hole 16 of the first expansion sheet membrane rod, and the second expansion sheet 12 is provided with The left insertion hole 17 of the second expansion sheet membrane rod, the second expansion sheet membrane sleeve slot 18 and the right insertion hole 19 of the second expansion sheet membrane rod, the third expansion sheet 13 is provided with the left insertion hole of the third expansion sheet membrane rod. Hole 20, the third expansion sheet membrane sleeve slot 21 and the third expansion sheet membrane rod right insertion hole 22, the head membrane sleeve 3 includes a sealing membrane sleeve 23 and a first left side that is arranged on the sealing membrane sleeve 23 side The insertion rod 24, the first right insertion rod 25, the second left insertion rod 26, the second right insertion rod 27, the third left insertion rod 28 and the third right insertion rod 29, wherein the first left insertion rod 24 is inserted In the left insertion hole 14 of the first expansion film rod, the first right insertion rod 25 is inserted in the right insertion hole 16 of the first expansion film rod, and the second left insertion rod 26 is inserted in the second expansion rod. In the left insertion hole 17 of the film rod, the second right insertion rod 27 is inserted in the right insertion hole 19 of the second expansion film rod, and the third left insertion rod 28 is inserted in the left side of the third expansion film rod. In the socket 20, the third right inserting rod 29 is inserted in the right socket 22 of the third expansion film rod, and the sealing film sleeve 23 is inserted into the first expansion film sleeve slot 15, the second expansion film film Sleeve slot 18 and the third expansion sheet film sleeve slot 21, so that the gap between the first expansion sheet 11 and the second expansion sheet 12, the gap between the second expansion sheet 12 and the third expansion sheet 13, the second expansion sheet The gap between the three expansion sheets 13 and the first expansion sheet 11, the through holes between the first expansion sheet 11, the second expansion sheet 12 and the third expansion sheet 13 are sealed, when the pedicle screw fixing threaded section 4 is completely When the first expansion sheet 11, the second expansion sheet 12, and the third expansion sheet 13 are stretched outward by entering the threaded hole 9, the first left insertion rod 24, the first right insertion rod 25, and the second left insertion rod 26 , The second right inserting rod 27, the third left inserting rod 28 and the third right inserting rod 29 drive the sealing film sleeve 23 to stretch and continue to keep the seal.

The left socket 14 of the membrane rod of the first expansion sheet, the right socket 16 of the first expansion sheet membrane rod, the left socket 17 of the second expansion sheet membrane rod, the right socket 19 of the second expansion sheet membrane rod, the third expansion sheet The depth of the left insertion hole 20 of the membrane rod and the right insertion hole 22 of the third expansion sheet membrane rod are the same. The depth of the groove 21 is the same, the left socket 14 of the first expansion film rod, the right socket 16 of the first expansion film rod, the left socket 17 of the second expansion film rod, the right socket of the second expansion film rod 19. The depths of the left insertion hole 20 of the third expansion film rod and the right insertion hole 22 of the third expansion film rod are greater than the first expansion film sleeve slot 15, the second expansion film sleeve slot 18 and the third expansion film sleeve slot 15. The depth of the film sleeve slot 21, the depth of the first expansion film sleeve slot 15, the second expansion film sleeve slot 18 and the third expansion film sleeve slot 21 respectively account for the first expansion sheet 11, less than half of the length of the second expansion sheet 12 and the third expansion sheet 13 .

The expansion fixation sleeve 2 is provided with a first bone cement injection channel 30, a second bone cement injection channel 31 and a third bone cement injection channel 32, and the first bone cement injection channel 30 includes the entrance of the first bone cement injection channel 33 and the first bone cement injection channel outlet 34, the second bone cement injection channel 31 includes the second bone cement injection channel inlet 35 and the second bone cement injection channel outlet 36, and the third bone cement injection channel 32 includes the second bone cement injection channel Three bone cement injection channel inlets 37 and a third bone cement injection channel outlet 38, the first bone cement injection channel 30, the second bone cement injection channel 31 and the third bone cement injection channel 32 are respectively connected to the first expansion sheet 11, The positions of the second expansion piece 12 and the third expansion piece 13 are corresponding, and the first bone cement injection channel entrance 33 , the second bone cement injection channel entrance 35 and the third bone cement injection channel entrance 37 are arranged on the expansion fixation sleeve 2 On the rear end face, the outlet 34 of the first bone cement injection channel is arranged on the outer surface of the first expansion sheet 11 and is located at the rear half of the first expansion sheet 11, and the outlet 36 of the second bone cement injection channel is arranged on the second half of the expansion sheet 11. On the outer surface of the second expansion sheet 12 and located at the rear half of the second expansion sheet 12, the third bone cement injection channel outlet 38 is arranged on the outer surface of the third expansion sheet 13 and at the rear of the third expansion sheet 13 half portion.

Including bone cement injection expansion fixation sleeve withdrawal device 39, said bone cement injection expansion fixation sleeve withdrawal device 39 includes injection cylinder 40 and piston 41, said injection cylinder 40 and piston 41 are matched, the bottom middle position of said injection cylinder 40 A circular positioning column 42 is provided, and a first injection tube 43, a second injection tube 44 and a third injection tube 45 are arranged on the periphery of the circular positioning column 42 at the bottom of the injection cylinder 40, and on the periphery of the bottom of the injection cylinder 40 A plurality of positioning rods 46 are provided, and a first withdrawal fixing seat 47 is provided on the bottom of the injection cylinder 40 between the first injection tube 43 and the second injection tube 44, and the second injection tube 44 and the third injection tube The bottom of the injection cylinder 40 between 45 is provided with a second withdrawal fixing seat 48, and the bottom of the injection cylinder 40 between the third injection tube 45 and the first injection tube 43 is provided with a third withdrawal fixing seat 49. The first draw hook 50 is provided on the first withdrawal fixing seat 47, the second draw hook 51 is provided on the second withdrawal fixing seat 48, the third draw hook 52 is provided on the third withdrawal fixing seat 49, and the injection barrel The side wall of 40 is provided with a first hanging hole 53, a second hanging hole 54 and a third hanging hole 55, the first draw hook 50 can be bent to hang the hook head on the first hanging hole 53, the second draw hook 51 can be bent to hang the hook head on the second hanging hole 54, the third pull hook 52 can be bent to hang the hook head on the third hanging hole 55, and the rear end surface of the expansion fixing sleeve 2 is provided with a first injection The tube head placement hole 56, the second injection tube head placement hole 57 and the third injection tube head placement hole 58, a plurality of positioning jacks 59 are provided on the periphery of the rear end surface of the expansion fixing sleeve 2, and the circle The positioning column 42 can be inserted into the threaded hole 9, the positioning rod 46 can be inserted into the positioning socket 59, and the first injection tube 43, the second injection tube 44 and the third injection tube 45 can be inserted into the first bone cement injection channel respectively. The inlet 33, the second bone cement injection channel inlet 35 and the third bone cement injection channel inlet 37, the first injection tube 43, the second injection tube 44 and the third injection tube 45 can be respectively inserted into the head of the first injection tube to place hole 56, the second injection tube head placement hole 57 and the third injection tube head placement hole 58, the first retractor 50, the second retractor 51 and the third retractor 52 can be respectively inserted into the first bone cement injection channel 30, The second bone cement injection channel 31 and the third bone cement injection channel 32, and the hook heads of the first retractor 50, the second retractor 51 and the third retractor 52 can respectively pass through the outlet 34 of the first bone cement injection channel, the second bone cement The injection channel outlet 36 and the third bone cement injection channel outlet 38 are hooked.

The first expansion sheet 11 , the second expansion sheet 12 and the third expansion sheet 13 are provided with a plurality of locking hooks 60 , and the first expansion sheet 11 , the second expansion sheet 12 and the third expansion sheet 13 The outer sides of the front end are provided with slopes.

As required, detailed embodiments of the invention are disclosed herein, but it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in different and alternative forms. The drawings are not necessarily drawn to scale. Therefore, specific structural and functional details disclosed herein are not to be interpreted in limiting senses, but merely as a representative basis for teaching one skilled in the art to employ and practice the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Claims (9)

1. A pedicle screw internal fixation device for spinal reinforcement, comprising a pedicle screw (1), characterized in that: comprising an expansion fixation sleeve (2) and a head membrane cover (3), the head membrane The sleeve (3) is used to seal the head of the expansion fixing sleeve (2), and the pedicle screw (1) includes a pedicle screw fixing thread segment (4) and a pedicle screw fixing seat (5), and the pedicle screw The pedicle screw fixing seat (5) is provided with a pedicle screw fixing seat threaded hole (6) and a pedicle screw fixing seat connecting slot hole (7), and the pedicle screw fixing seat threaded hole (6) is provided with a countersunk head The fixing nut (8), the expansion fixing sleeve (2) is provided with a threaded hole (9), the fixing threaded section (4) of the pedicle screw is matched with the threaded hole (9), and the expansion fixing sleeve ( 2) including the expansion and fixing sleeve body (10) and the first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet (13) arranged on the head of the expansion and fixing sleeve body (10), the The first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet (13) can be stretched outward and cooperate with each other, and the first expansion sheet (11) is provided with a first expansion sheet. The left insertion hole (14) of the film rod, the first expansion film sleeve slot (15) and the right insertion hole (16) of the first expansion film rod, the second expansion film (12) is provided with a second expansion The left socket (17) of the film rod, the second expansion film sleeve slot (18) and the right socket (19) of the second expansion film rod, the third expansion film (13) is provided with a third expansion Diaphragm pole left socket (20), the third expansion membrane sleeve slot (21) and the third expansion membrane rod right insertion hole (22), the head membrane sleeve (3) includes a sealing membrane sleeve (23 ) and the first left inserting rod (24), the first right inserting rod (25), the second left inserting rod (26), the second right inserting rod (27), The third left insertion rod (28) and the third right insertion rod (29), wherein the first left insertion rod (24) is inserted in the left insertion hole (14) of the first expansion sheet membrane rod, the first The right insertion rod (25) is inserted in the right insertion hole (16) of the first expansion film rod, and the second left insertion rod (26) is inserted in the left insertion hole (17) of the second expansion film rod, The second right insertion rod (27) is inserted in the right socket (19) of the second expansion film rod, and the third left insertion rod (28) is inserted in the left socket of the third expansion film rod ( 20), the third right inserting rod (29) is inserted into the right socket (22) of the third expansion film rod, and the sealing film sleeve (23) is inserted into the slot of the first expansion film film sleeve (15 ), the second expansion sheet film sleeve slot (18) and the third expansion sheet film sleeve slot (21), so that the gap between the first expansion sheet (11) and the second expansion sheet (12), the second expansion sheet The gap between the expansion sheet (12) and the third expansion sheet (13), the gap between the third expansion sheet (13) and the first expansion sheet (11), the first expansion sheet (11), the second expansion sheet (12) and the through hole between the third expansion sheet (13) are sealed, when the pedicle screw fixing threaded section (4) enters the threaded hole (9) completely and the first When the expansion sheet (11), the second expansion sheet (12) and the third expansion sheet (13) are stretched outward, the first left insertion rod (24), the first right insertion rod (25), the second left insertion rod Inserting rod (26), the second right inserting rod (27), the third left inserting rod (28) and the third right inserting rod (29) drive the sealing film cover (23) to stretch and continue to keep sealing. 2. A kind of internal fixation device for spinal reinforcement pedicle screw according to claim 1, characterized in that: the left insertion hole (14) of the first expansion sheet membrane rod, the right insertion hole of the first expansion sheet membrane rod Hole (16), the left insertion hole of the second expansion film rod (17), the right insertion hole of the second expansion film rod (19), the left insertion hole of the third expansion film rod (20) and the third expansion film rod The depth of the right insertion (22) hole is the same, and the depths of the first expansion film sleeve slot (15), the second expansion film sleeve slot (18) and the third expansion film sleeve slot (21) are the same , the left socket (14) of the first expansion film rod, the right socket (16) of the first expansion film rod, the left socket (17) of the second expansion film rod, the right insertion hole of the second expansion film rod The depths of the hole (19), the left insertion hole (20) of the third expansion sheet membrane rod and the right insertion hole (22) of the third expansion sheet membrane rod are greater than that of the first expansion sheet membrane sleeve slot (15), the second expansion sheet The depth of the film sleeve slot (18) and the third expansion film sleeve slot (21), the first expansion film sleeve slot (15), the second expansion film sleeve slot (18) and the third The depths of the slots (21) of the expansion sheet film sleeve respectively account for less than half of the lengths of the first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet (13). 3. A kind of internal fixation device for spinal reinforcement pedicle screw according to claim 1 or 2, characterized in that: said expansion fixation sleeve (2) is provided with a first bone cement injection channel (30), The second bone cement injection channel (31) and the third bone cement injection channel (32), the first bone cement injection channel (30) includes the first bone cement injection channel inlet (33) and the first bone cement injection channel outlet (34), the second bone cement injection channel (31) includes a second bone cement injection channel inlet (35) and a second bone cement injection channel outlet (36), and the third bone cement injection channel (32) includes The third bone cement injection channel inlet (37) and the third bone cement injection channel outlet (38), the first bone cement injection channel (30), the second bone cement injection channel (31) and the third bone cement injection channel (32) Corresponding to the positions of the first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet (13) respectively, the first bone cement injection channel entrance (33), the second bone cement injection The channel inlet (35) and the third bone cement injection channel inlet (37) are arranged on the rear end surface of the expansion fixation sleeve (2), and the first bone cement injection channel outlet (34) is arranged on the first expansion piece (11) On the outer surface of the first expansion sheet (11), the second bone cement injection channel outlet (36) is arranged on the outer surface of the second expansion sheet (12), and is located on the second expansion sheet ( 12), the third bone cement injection channel outlet (38) is arranged on the outer surface of the third expansion sheet (13), and is located in the second half of the third expansion sheet (13). 4. A kind of internal fixation device for spinal column reinforcement pedicle screw according to claim 1 or 2, characterized in that: it comprises a bone cement injection expansion fixation sleeve withdrawal device (39), and the bone cement injection expansion fixation sleeve The withdrawal device (39) comprises a syringe (40) and a piston (41), and the syringe (40) and the piston (41) are matched, and a circular positioning column ( 42), the circumference of the circular positioning column (42) at the bottom of the injection cylinder (40) is provided with a first injection tube (43), a second injection tube (44) and a third injection tube (45), the injection A plurality of positioning rods (46) are provided on the periphery of the bottom of the cylinder (40), and a first withdrawal fixing rod is provided on the bottom of the injection cylinder (40) between the first injection tube (43) and the second injection tube (44). seat (47), the bottom of the syringe (40) between the second injection tube (44) and the third injection tube (45) is provided with a second withdrawal fixing seat (48), and the third injection tube ( 45) The bottom of the injection cylinder (40) between the first injection tube (43) is provided with a third withdrawing fixing seat (49), and the first withdrawing fixing seat (47) is provided with a first pull hook (50) , the second withdrawal hook (51) is provided on the second withdrawal fixing seat (48), the third withdrawal hook (52) is provided on the third withdrawal fixing seat (49), and the side of the injection barrel (40) The wall is provided with a first hanging hole (53), a second hanging hole (54) and a third hanging hole (55), and the first pull hook (50) can be bent to hang the hook head on the first hanging hole (53) Above, the second pull hook (51) can be bent to hang the hook head on the second hanging hole (54), and the third pull hook (52) can be bent to hang the hook head on the third hanging hole (55), The rear end surface of the expansion fixing sleeve (2) is provided with a first injection tube head placement hole (56), a second injection tube head placement hole (57) and a third injection tube head placement hole (58), A plurality of positioning sockets (59) are provided on the periphery of the rear end surface of the expansion fixing sleeve (2), the circular positioning column (42) can be inserted into the threaded hole (9), and the positioning rod (46) can be inserted into Locate the socket (59), the first injection tube (43), the second injection tube (44) and the third injection tube (45) can be respectively inserted into the first bone cement injection channel entrance (33), the second bone cement Injection channel inlet (35) and the third bone cement injection channel inlet (37), the first injection tube (43), the second injection tube (44) and the third injection tube (45) can be inserted into the first injection tube respectively The head placement hole (56), the second injection tube head placement hole (57) and the third injection tube head placement hole (58), the first drag hook (50), the second drag hook (51) and the third The retractor (52) can be respectively inserted into the first bone cement injection channel (30), the second bone cement injection channel (31) and the third bone cement injection channel (32), and the first retractor (50), the second retractor (51 ) and the hook head of the third pull hook (52) can be respectively injected from the first bone cement injection channel outlet (34), the second bone cement The cement injection channel outlet (36) and the third bone cement injection channel outlet (38) are hooked. 5. A pedicle screw internal fixation device for spinal reinforcement according to claim 3, characterized in that: it comprises a bone cement injection expansion fixation sheath withdrawal device (39), said bone cement injection expansion fixation sheath withdrawal device (39) comprising a syringe (40) and a piston (41), the syringe (40) and the piston (41) are matched, and the middle position of the bottom of the syringe (40) is provided with a circular positioning post (42) , the circumference of the circular positioning column (42) at the bottom of the injection cylinder (40) is provided with a first injection tube (43), a second injection tube (44) and a third injection tube (45), and the injection cylinder ( 40) A plurality of positioning rods (46) are provided on the periphery of the bottom, and a first withdrawing fixing seat ( 47), the bottom of the injection cylinder (40) between the second injection pipe (44) and the third injection pipe (45) is provided with a second withdrawal fixing seat (48), and the third injection pipe (45) The bottom of the injection cylinder (40) between the first injection tube (43) is provided with a third withdrawing fixing seat (49), and the first withdrawing fixing seat (47) is provided with a first pull hook (50), so A second draw hook (51) is provided on the second exit fixing seat (48), a third draw hook (52) is provided on the third exit fixing seat (49), and a third draw hook (52) is provided on the side wall of the injection barrel (40). A first hanging hole (53), a second hanging hole (54) and a third hanging hole (55) are provided, the first pull hook (50) can be bent to hang the hook head on the first hanging hole (53), The second draw hook (51) can be bent to hang the hook head on the second hanging hole (54), and the third draw hook (52) can be bent to hang the hook head on the third hanging hole (55). The rear end surface of the expansion fixing sleeve (2) is provided with a first injection tube head placement hole (56), a second injection tube head placement hole (57) and a third injection tube head placement hole (58). A plurality of positioning jacks (59) are provided on the periphery of the rear end surface of the expansion fixing sleeve (2), the circular positioning post (42) can be inserted into the threaded hole (9), and the positioning rod (46) can be inserted into the positioning plug hole (59), the first injection tube (43), the second injection tube (44) and the third injection tube (45) can be respectively inserted into the first bone cement injection channel inlet (33), the second bone cement injection channel Inlet (35) and the third bone cement injection channel inlet (37), the first injection tube (43), the second injection tube (44) and the third injection tube (45) can be respectively inserted into the head of the first injection tube Placement hole (56), the second injection tube head placement hole (57) and the third injection tube head placement hole (58), the first drag hook (50), the second drag hook (51) and the third drag hook ( 52) The first bone cement injection channel (30), the second bone cement injection channel (31) and the third bone cement injection channel (32) can be inserted respectively, and the first retractor (50), the second retractor (51) and The hook head of the third pull hook (52) can be respectively injected from the first bone cement injection channel outlet (34), the second bone cement The injection channel outlet (36) and the third bone cement injection channel outlet (38) are hooked. 6. A pedicle screw internal fixation device for spinal reinforcement according to claim 1 or 2, characterized in that: the first expansion piece (11), the second expansion piece (12) and the third expansion piece A plurality of locking hooks (60) are provided on each piece (13), and the front end outer surfaces of the first expansion piece (11), the second expansion piece (12) and the third expansion piece (13) are all sloped. 7. A kind of internal fixation device for spinal reinforcement pedicle screw according to claim 3, characterized in that: the first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet ( 13) are provided with a plurality of locking hooks (60), and the outer surfaces of the front ends of the first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet (13) are all sloped. 8. A kind of internal fixation device for spinal reinforcement pedicle screw according to claim 4, characterized in that: the first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet ( 13) are provided with a plurality of locking hooks (60), and the outer surfaces of the front ends of the first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet (13) are all sloped. 9. A kind of internal fixation device for spinal reinforcement pedicle screw according to claim 5, characterized in that: the first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet ( 13) are provided with a plurality of locking hooks (60), and the outer surfaces of the front ends of the first expansion sheet (11), the second expansion sheet (12) and the third expansion sheet (13) are all sloped.