CN219109701U - Nail sheath fixing system suitable for spinal osteoporosis - Google Patents

Abstract

The utility model relates to the field of medical equipment, in particular to a nail sheath fixing system suitable for spinal osteoporosis, which comprises a spinal nail and a fixing sheath, wherein threads are arranged on the peripheral surface of the spinal nail, the fixing sheath is a hollow rod which is vertically penetrated, a clamping groove which is penetrated with the inside of the fixing sheath is formed in the side wall of the fixing sheath, and a clamping block is fixedly connected on the inner wall of the clamping groove; the spine nails are arranged in the fixing sheath in a penetrating mode and used for driving the clamping blocks to move. The application improves the problem that the spine nails are easy to loose.

Description

Nail sheath fixing system suitable for spinal osteoporosis

Technical Field

The present application relates to the field of medical devices, and in particular to a nail sheath fixation system suitable for spinal osteoporosis.

Background

At present, the internal fixation operation of the spine is a common method for clinically treating the spine instability caused by unbalance of three columns of the spine, and spine nails are the most main fixing parts in a fixing system and are the precondition for realizing the stability of the internal fixation system of the spine.

In the related art, the spine nail comprises a nail head and a nail rod, threads are arranged on the nail rod, in the process of spine fixation operation, firstly, a preparation point of a patient is determined, then, an apparatus is used for rotating an osteoclast cortex, rotating out a vertebral arch root hole, then, the spine nail is implanted into the vertebral arch root hole, and bone cement is injected to fix the spine nail.

Aiming at the related technology, in the process of fixing the spine nails, the problem of poor bone cement dispersibility due to poor bone cement pouring effect is easy to occur, so that the spine nails are easy to loosen under the shearing action of repeated bending and stretching activities.

Disclosure of Invention

In order to solve the problem that the spine nails are easy to loosen, the application provides a nail sheath fixing system suitable for spine osteoporosis.

The application provides a nail sheath fixing system suitable for spine osteoporosis adopts following technical scheme:

the utility model provides a be applicable to spine osteoporosis nail sheath fixing system, includes spine nail and fixed sheath, be provided with fixed screw thread on the global of spine nail, fixed sheath is the hollow rod that link up from top to bottom, set up the joint groove that link up with the inside of fixed sheath on the lateral wall of fixed sheath, fixedly connected with joint piece on the inner wall of joint groove; the spine nails are arranged in the fixing sheath in a penetrating mode and used for driving the clamping blocks to move so as to fix the fixing sheath.

Through adopting above-mentioned technical scheme, at the in-process of fixing the spine nail, put into the vertebral arch root hole with the fixed sheath at first, then wear to establish the spine nail to in the fixed sheath, spine nail drive joint piece moves to the outside of fixed sheath, and inserts the internal portion of centrum, has strengthened the anti-pull-out force of fixed sheath in the centrum to the compactness that spine nail and fixed sheath are connected has been strengthened, has shortened patient's wound healing's time simultaneously, has improved the easy problem that takes place not hard up of spine nail.

Preferably, the clamping block part extends into the fixing sheath, the spine nail is abutted with the clamping block, and the clamping block is pushed to the outer side of the fixing sheath.

Through adopting above-mentioned technical scheme, at the in-process that the spine nail worn to establish to the fixed sheath, spine nail at first with joint piece butt, then the spine nail directly promotes the joint piece and moves to the outside of fixed sheath, the staff of being convenient for operates.

Preferably, the clamping blocks are provided in a plurality, and the clamping blocks are uniformly distributed along the circumference of the fixing sheath.

Through adopting above-mentioned technical scheme, the clamping piece provides holds the power more even, makes fixed sheath and backbone nail more firm in the centrum, further improved the easy problem that takes place not hard up of backbone nail.

Preferably, the clamping block is provided with fixed teeth.

By adopting the technical scheme, the friction between the clamping block and the vertebral body is increased, and the stability of the fixing sheath and the spine nail in the vertebral body is further increased.

Preferably, the bottom of the fixing sheath gradually decreases from one side close to the clamping block to one side far away from the clamping block from the axis of the fixing sheath.

By adopting the technical scheme, the taper at the bottom of the fixed sheath increases the convenience of the fixed sheath during implantation.

Preferably, the bottom of the fixing sheath is fixedly connected with a fixing sheet, and the spine nails are abutted with the fixing sheet and push the fixing sheet to move.

Through adopting above-mentioned technical scheme, wear to establish to the in-process of fixed sheath at the backbone nail, backbone nail and stationary blade butt push away the stationary blade to the outside of fixed sheath afterwards, and the stationary blade has increased the holding power of fixed sheath and backbone nail in the centrum, has further improved the easy problem that takes place not hard up of backbone nail.

Preferably, the fixing thread comprises a taper thread and a double-line thread, and the taper thread is abutted with the clamping block.

By adopting the technical scheme, in the process that the spine nails penetrate through the fixing sheath, the taper threads are abutted with the inner wall of the fixing sheath to push the clamping blocks and the fixing sheets to move, so that the holding force of the fixing sheath is increased; the double-thread screw threads are screwed into cortical bone, so that the stability of the spine nail in the vertebral body is improved.

Preferably, the fixing sheath is made of polyether-ether material.

By adopting the technical scheme, the elastic modulus of the polyether-ether material is close to that of human bones, so that the occurrence of anaphylaxis of patients can be reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the spine nail fixing device, the fixing sheath is arranged, the spine body is implanted into the fixing sheath to fix the spine nail, the polyether-ether material is adopted for the fixing sheath, so that the allergic condition of a patient is reduced, the clamping blocks arranged on the fixing sheath move to the outer side of the fixing sheath under the action of the spine nail, the holding force of the spine nail and the fixing sheath in the spine body is increased, and the problem that the spine nail is easy to loosen is solved;

2. according to the fixing piece fixedly connected to the bottom of the fixing sheath, the fixing piece moves to increase the holding force of the fixing sheath and the spine nails in the vertebral body, so that the problem that the spine nails are easy to loosen is further solved;

3. according to the spine nail fixing device, the taper threads and the double-line threads on the spine nail are arranged, the taper threads are abutted with the inner wall of the fixing sheath in the process that the spine nail passes through the fixing sheath, the clamping block and the fixing sheet are pushed to move, and the holding force of the fixing sheath is increased; the double-thread screw threads are screwed into cortical bone, so that the stability of the spine nail in the vertebral body is improved.

Drawings

Fig. 1 is a schematic overall structure of a nail sheath fixation system suitable for use in spinal osteoporosis according to an embodiment of the present application.

Fig. 2 is a schematic view of the structure of a spinal staple according to an embodiment of the present application.

Fig. 3 is a schematic cross-sectional structure of a fixing sheath according to an embodiment of the present application.

Reference numerals illustrate: 1. spinal nails; 11. a fixed thread; 111. taper threads; 112. a double thread; 12. a pin head; 121. self-tapping grooves; 13. nailing the rod; 14. a nail seat; 141. a U-shaped groove; 142. negative angle threads; 143. breaking the groove; 2. a fixation sheath; 21. a clamping groove; 22. a clamping block; 221. a fixed tooth; 23. and a fixing piece.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses a nail sheath fixing system suitable for spinal osteoporosis. Referring to fig. 1 and 2, a nail sheath fixing system suitable for spinal osteoporosis comprises a spinal nail 1 and a fixing sheath 2, wherein the fixing sheath 2 is made of polyether-ether material, and the elastic modulus of the polyether-ether material is close to that of bones, so that the occurrence of allergy can be effectively reduced; the spine nail 1 comprises a nail head 12, a nail rod 13 and a nail seat 14, wherein the nail head 12 and the nail seat 14 are respectively fixedly connected with two ends of the nail rod 13; the nail head 12 is provided with a self-tapping groove 121, and the self-tapping groove 121 can accelerate the process of drilling the vertebral body by the spine nail 1.

The peripheral surface of the nail rod 13 is uniformly provided with fixing threads 11, the fixing threads 11 comprise taper threads 111 arranged on one side of the nail rod 13 close to the nail head 12 and double-line threads 112 arranged on one side of the nail rod 13 close to the nail seat 14, the double-line threads 112 are abutted with cortical bone, the spine nail 1 can be fixed, and the taper threads 111 and the double-line threads 112 are integrally formed; the side wall of the nail seat 14 far away from the nail rod 13 is provided with a U-shaped groove 141 with two through sides, the inner wall of the U-shaped groove 141 is provided with a negative angle thread 142 matched with the screw plug, the middle part of the nail seat 14 is provided with a breaking groove 143, and the tail part of the nail seat 14 can be easily broken by the breaking groove 143.

Referring to fig. 1 and 3, a fixing sheath 2 is a hollow rod penetrating up and down, a spine nail 1 can be inserted into the fixing sheath 2, a plurality of clamping grooves 21 are uniformly formed in the circumferential surface of the fixing sheath 2 along the circumferential direction of the fixing sheath 2, a plurality of groups of clamping grooves 21 are formed in the axial direction of the fixing sheath 2, the groups of clamping grooves 21 are distributed in a staggered manner, clamping blocks 22 are fixedly connected to the side wall, close to a nail head 12, of the clamping grooves 21, the clamping blocks 22 extend to the inside of the fixing sheath 2, the clamping blocks 22 are abutted with taper threads 111, and in the process of penetrating the spine nail 1 into the fixing sheath 2, the taper threads 111 push the clamping blocks 22 to the outer side of the fixing sheath 2 for reinforcing the fixing sheath 2; the outer wall of the clamping block 22 is provided with fixing teeth 221, and the fixing teeth 221 are inserted into the vertebral body, so that the holding force of the fixing sheath 2 in the vertebral body is further increased.

Referring to fig. 1 and 3, one end of the fixing sheath 2, which is close to the nail head 12, is fixedly connected with a plurality of fixing sheets 23, the plurality of fixing sheets 23 are uniformly distributed along the circumferential direction of the fixing sheath 2, and a gap is reserved between two adjacent fixing sheets 23; the distance from one end close to the joint piece 22 to one end far away from the joint piece 22 of a plurality of stationary blades 23 is reduced gradually from the distance of fixed sheath 2 axis, and the fixed sheath 2 of being convenient for implants in the centrum, stationary blade 23 and tapering screw thread 111 butt, tapering screw thread 111 promote stationary blade 23 to the outside motion to the deformation of fixed sheath 2, and stationary blade 23 is used for strengthening fixed sheath 2, and the inside of convenient fixed sheath 2 implantation centrum.

The implementation principle of the nail sheath fixing system suitable for the spinal osteoporosis is as follows: in the process of performing the internal fixation operation of the spine, firstly, the fixation sheath 2 is implanted into the pedicle hole, the spine nail 1 is moved along the direction of the pedicle hole by the screw plug, the spine nail is screwed into the fixation sheath 2 under the action of the self-tapping groove 121, the taper thread 111 is firstly abutted with the clamping block 22, and then the clamping block 22 is pushed to move towards the outer side of the fixation sheath 2 for reinforcing the fixation sheath 2; the spine nail 1 is screwed into the bottom of the fixing sheath 2, the taper thread 111 is abutted with the fixing piece 23, then the fixing piece 23 is pushed to move towards the outer side of the fixing sheath 2, the stability of the fixing sheath 2 and the spine nail 1 in the vertebral body is further improved, the double-line thread 112 is abutted with cortical bone, the stability of the spine nail 1 in the vertebral body is improved, and the problem that the spine nail 1 is easy to loose is solved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides a nail sheath fixing system suitable for backbone osteoporosis, includes backbone nail (1) and fixed sheath (2), be provided with fixed screw thread (11), its characterized in that on the global of backbone nail (1): the fixing sheath (2) is a hollow rod which penetrates up and down, a clamping groove (21) which penetrates through the inside of the fixing sheath (2) is formed in the side wall of the fixing sheath (2), and a clamping block (22) is fixedly connected to the inner wall of the clamping groove (21); the spine nail (1) is arranged in the fixing sheath (2) in a penetrating mode and is used for driving the clamping block (22) to move.

2. A nail sheath fixation system for spinal osteoporosis according to claim 1, wherein: the clamping block (22) extends into the fixing sheath (2), and the spine nail (1) can be abutted with the clamping block (22) and push the clamping block (22) to the outer side of the fixing sheath (2).

3. A nail sheath fixation system for spinal osteoporosis according to claim 1, wherein: the clamping blocks (22) are arranged in a plurality, and the clamping blocks (22) are uniformly distributed along the circumferential direction of the fixing sheath (2).

4. A nail sheath fixation system for spinal osteoporosis according to claim 1, wherein: the clamping block (22) is provided with fixed teeth (221).

5. A nail sheath fixation system for spinal osteoporosis according to claim 1, wherein: the distance from one end of the fixing sheath (2) to the axis of the fixing sheath (2) from one side close to the clamping block (22) to one side far away from the clamping block (22) is gradually reduced.

6. A nail sheath fixation system for spinal osteoporosis according to claim 1, wherein: the end face of the fixing sheath (2) is fixedly connected with a fixing piece (23), and the spine nail (1) can be abutted with the fixing piece (23) and push the fixing piece (23) to move.

7. A nail sheath fixation system for spinal osteoporosis according to claim 1, wherein: the fixing thread (11) comprises a taper thread (111) and a double-line thread (112), and the taper thread (111) is abutted with the clamping block (22).

8. A nail sheath fixation system for spinal osteoporosis according to claim 1, wherein: the fixing sheath (2) is made of polyether-ether material.

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