CN109528280B - Anti-displacement device and anti-displacement system for internal fixation - Google Patents
Anti-displacement device and anti-displacement system for internal fixation Download PDFInfo
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- CN109528280B CN109528280B CN201811552319.XA CN201811552319A CN109528280B CN 109528280 B CN109528280 B CN 109528280B CN 201811552319 A CN201811552319 A CN 201811552319A CN 109528280 B CN109528280 B CN 109528280B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 230
- 230000007246 mechanism Effects 0.000 claims abstract description 152
- 241001079814 Symphyotrichum pilosum Species 0.000 claims abstract description 8
- 235000004224 Typha angustifolia Nutrition 0.000 claims abstract description 8
- 230000002265 prevention Effects 0.000 claims description 38
- 238000004393 prognosis Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 238000001356 surgical procedure Methods 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 230000001575 pathological effect Effects 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 206010034156 Pathological fracture Diseases 0.000 description 1
- 206010041549 Spinal cord compression Diseases 0.000 description 1
- 208000005250 Spontaneous Fractures Diseases 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 206010013990 dysuria Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000000278 spinal cord Anatomy 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
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- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract
The invention relates to an anti-displacement device for internal fixation, which is applied to vertebral body reconstruction and comprises: the main body is provided with a containing groove, the containing groove is arranged at the upper part of the main body, and the containing groove penetrates through the main body along the radial direction of the main body or is a U-shaped groove; the connecting mechanism is arranged at the lower part of the main body, and the main body is detachably connected with the pedicle screw tail or the connecting rod of the nail rod system through the connecting mechanism; and the locking mechanism is respectively connected with the main body and the accommodating groove. And to an anti-displacement system for internal fixation. The anti-displacement device has the advantages that the anti-displacement device can accommodate and lock the limiting rope and can be connected with the pedicle screw tail and/or the connecting rod of the rod nailing system, so that the internal fixation is firmer, the implanted vertebral body cannot displace, sink and the like, the prognosis efficiency is improved, and the secondary operation is avoided.
Description
Technical Field
The invention relates to the technical field of spine defect area reconstruction, in particular to an anti-displacement device and an anti-displacement system for internal fixation.
Background
In actual life, the bone of the vertebral body of the vertebral column of a patient is seriously damaged due to infection, trauma or tumor, and the spinal cord of the patient with pathological fracture of the vertebral body can be seriously pressed, so that the symptoms such as serious paralysis of lower limbs, dysuria and the like are caused, the pathological vertebral body of the patient is usually required to be excised through surgery for surgical treatment of the patient, and a vertebral body prosthesis (usually a titanium net, an artificial vertebral body or an existing emerging 3D printing artificial vertebral body) is used for reconstructing a vertebral column defect area after the pathological vertebral body excision in the surgery.
After implantation of the vertebral body prosthesis, the conventional vertebral body prosthesis may be displaced during long term use, for example, after the patient is vertically walked after being recovered after operation, the vertebral body prosthesis is displaced forward due to gravity, spinal stress or external force, that is, from the rear edge of the vertebral body to the front edge of the vertebral body, and the serious cases may occur that the vertebral body prosthesis is completely dislocated forward. After the vertebral body prosthesis is displaced, the stability of the vertebral column is reduced, the vertebral column is instable, the physiological curvature of the vertebral column is changed, even serious spinal cord compression is repeated, the postoperative symptoms are repeated again, the serious patient needs to be repaired by secondary operation, the postoperative recovery time and the treatment cost of the patient are increased, the life quality of the patient is reduced, and the serious condition often occurs in the segments with larger physiological curvature of the vertebral column, such as the titanium mesh after the lumbar 4 and lumbar 5 vertebral body is excised or the patient with artificial vertebral body reconstruction.
Therefore, there is a need for an anti-displacement device that can avoid the displacement of the vertebral body prosthesis during long-term use, firmly fix the vertebral body prosthesis, and reduce the probability of secondary surgery.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art and provides an anti-displacement device and an anti-displacement system for internal fixation.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an anti-displacement device for internal fixation, for use in vertebral body reconstruction, comprising:
the main body is provided with a containing groove, the containing groove is arranged at the upper part of the main body, and the containing groove penetrates through the main body along the radial direction of the main body or is a U-shaped groove;
the connecting mechanism is arranged at the lower part of the main body, and the main body is detachably connected with the pedicle screw tail or the connecting rod of the nail rod system through the connecting mechanism;
and the locking mechanism is respectively connected with the main body and the accommodating groove.
Preferably, the locking mechanism is connected with the connecting mechanism.
Preferably, the connection means is "concave" or "mouth" shaped.
Preferably, the inner side surface of the connection mechanism is provided with a plurality of protrusions.
Preferably, the body is of a "concave" or "return" shape
Preferably, the locking mechanism is a screw.
Preferably, the device further comprises a limiting mechanism, wherein the limiting mechanism is arranged along the radial direction of the connecting mechanism, and the first end of the limiting mechanism penetrates through the connecting mechanism and is connected with the pedicle screw tail or the connecting rod.
Preferably, the limiting mechanism is a screw.
There is also provided an anti-displacement system for internal fixation, comprising:
anti-displacement vertebral body prosthesis:
the limiting ropes are arranged on two sides of the anti-displacement vertebral body prosthesis, and are connected with the anti-displacement vertebral body prosthesis to form a U-shaped structure;
the anti-displacement devices are arranged above two sides of the anti-displacement cone prosthesis and are connected with the limiting ropes in a one-to-one correspondence manner;
the displacement prevention device includes:
the main body is provided with a containing groove, the containing groove is arranged at the upper part of the main body, the containing groove penetrates through the main body along the radial direction of the main body or is a U-shaped groove, and the limiting rope is arranged in the corresponding containing groove of the displacement preventing device;
the connecting mechanism is arranged at the lower part of the main body;
the locking mechanism is arranged along the radial direction of the accommodating groove, and the first end of the locking mechanism penetrates through the main body, goes deep into the accommodating groove and is connected with the limiting rope in the accommodating groove.
Preferably, the locking mechanism is connected with the connecting mechanism.
Preferably, the connection means is "concave" or "mouth" shaped.
Preferably, the inner side surface of the connection mechanism is provided with a plurality of protrusions.
Preferably, the body is of a "concave" or "return" shape
Preferably, the locking mechanism is a screw.
Preferably, the displacement preventing device further comprises a limiting mechanism, wherein the limiting mechanism is arranged along the radial direction of the connecting mechanism, and the first end of the limiting mechanism penetrates through the connecting mechanism and is connected with the pedicle screw tail or the connecting rod.
Preferably, the limiting mechanism is a screw.
Compared with the prior art, the invention has the following technical effects:
the displacement prevention device and the displacement prevention system for internal fixation can accommodate and lock the limiting rope, and can be connected with the pedicle screw tail and/or the connecting rod of the rod nailing system, so that the internal fixation is firmer, the implanted vertebral body cannot displace, sink and the like, the long-term prognosis of a patient is improved, and the secondary operation is avoided; the displacement prevention device has simple structure and convenient use, and is convenient for operators to operate.
Drawings
FIG. 1 is a schematic view of an anti-displacement device according to an exemplary embodiment of the present invention.
Fig. 2 is a cross-sectional view of an anti-displacement device according to an exemplary embodiment of the present invention.
FIG. 3 is a schematic diagram of an anti-displacement system according to an exemplary embodiment of the present invention.
Fig. 4 is a schematic view of an anti-displacement device according to a preferred embodiment of the present invention.
Fig. 5 is a cross-sectional view of an anti-displacement device according to a preferred embodiment of the present invention.
Fig. 6 is a schematic view of an anti-displacement device according to a preferred embodiment of the present invention.
Fig. 7 is a cross-sectional view of an anti-displacement device according to a preferred embodiment of the present invention.
Fig. 8 is a schematic view of an anti-displacement system according to a preferred embodiment of the present invention.
Fig. 9 is a schematic view of an anti-displacement device according to a preferred embodiment of the present invention.
Fig. 10 is a cross-sectional view of an anti-displacement device according to a preferred embodiment of the present invention.
FIG. 11 is a schematic diagram of an anti-displacement system of a preferred embodiment of the present invention.
Fig. 12 is a schematic view of an anti-displacement device according to a preferred embodiment of the present invention.
Fig. 13 is a cross-sectional view of an anti-displacement device according to a preferred embodiment of the present invention.
Fig. 14 is a cross-sectional view of an anti-displacement device according to a preferred embodiment of the present invention.
Fig. 15 is a schematic view of an anti-displacement system according to a preferred embodiment of the present invention.
Wherein the reference numerals are as follows: an anti-displacement device 1; an anti-displacement vertebral body prosthesis 2; a limit rope 3; pedicle screws 4; a connecting rod 5; a main body 11; a receiving groove 12; a connection mechanism 13; a locking mechanism 14; a protrusion 15; a spacing mechanism 16.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
Example 1
This embodiment is an exemplary embodiment of the present invention, and as shown in fig. 1 to 2, an anti-displacement device for internal fixation, the anti-displacement device 1 includes a main body 11, a receiving groove 12, a connecting mechanism 13, and a locking mechanism 14, the receiving groove 12 is provided on the main body 11, and the receiving groove 12 penetrates the main body 11 in a radial direction of the main body 11, the connecting mechanism 13 is provided at a lower end of the main body 11, the locking mechanism 14 is provided on one side of the main body 11 in the radial direction of the receiving groove 12, and a first end of the locking mechanism 14 penetrates one side of the main body 11 and penetrates into the receiving groove 12.
The shape of the body 11 may be a cylinder, a rectangular parallelepiped, or other three-dimensional shape. In this embodiment, the body 11 is a cylinder.
The receiving groove 12 may be an "O" groove, i.e., the body 11 is "back" shaped; the receiving groove 12 may also be a "U" shaped groove, i.e. the body 11 is "concave" shaped. In this embodiment, the receiving groove 12 is an "O" groove.
The cross section of the connecting mechanism 13 can be O-shaped, mouth-shaped, U-shaped (or concave), and the specific shape can be selected according to the operation requirement. In this embodiment, the connecting mechanism 13 has a "U" shape in cross section.
Further, the connection mechanism 13 may also be a claw-shaped connection mechanism, i.e. comprising at least two connection claws for seizing a specific object.
Further, the direction of the "U" shaped opening of the connection mechanism 13 may be either co-directional with the axial direction of the main body 11 (i.e., co-directional with the radial direction of the receiving groove 12) or may be co-directional with the radial direction of the main body 11 (i.e., co-directional with the axial direction of the receiving groove 12).
In the present embodiment, the "U" shaped opening direction of the connection mechanism 13 is co-directional with the radial direction of the main body 11.
In the present embodiment, the locking mechanism 14 is a screw, the screw end of the locking mechanism 14 is screwed from the outside of the main body 11 to the inside of the main body 11, and the screw end of the locking mechanism 14 enters the accommodation groove 12.
Further, a plurality of protrusions 15 are provided on the inner side of the connection mechanism 13, and the protrusions 15 are regularly or irregularly distributed.
Further, the shape of the protrusion 15 may be a sphere, a cone, or a block. In the present embodiment, the shape of the protrusion 15 is a sphere.
Further, the displacement preventing device 1 is made of stainless steel material, titanium alloy or the like.
As shown in fig. 3, an anti-displacement system for internal fixation comprises an anti-displacement device 1, an anti-displacement cone prosthesis 2 and a limiting rope 3, wherein the limiting rope 3 is connected with the anti-displacement cone prosthesis 2 to form a U-shaped structure, the anti-displacement device 1 is symmetrically arranged at two sides of the anti-displacement cone prosthesis 2, and the limiting ropes 3 at two sides of the anti-displacement cone prosthesis 2 are respectively connected with the corresponding anti-displacement device 1.
If the connection mode of the limiting rope 3 and the displacement preventing cone prosthesis 2 is that the limiting rope 3 surrounds the bottom of the displacement preventing cone prosthesis 2 and extends towards two sides of the displacement preventing cone prosthesis 2, each displacement preventing system comprises at least one displacement preventing cone prosthesis 2, at least one limiting rope 3 and at least two displacement preventing devices 1, one limiting rope 3 corresponds to two displacement preventing devices 1, the first end of one limiting rope 3 is fixedly connected with one displacement preventing device 1, and the second end of the limiting rope 3 is fixedly connected with the other displacement preventing device 1.
If the connection mode of the limiting rope 3 and the displacement preventing cone prosthesis 2 is that two sides of the displacement preventing cone prosthesis 2 are respectively connected with at least one limiting rope 3, each displacement preventing system comprises at least one displacement preventing cone prosthesis 2, at least two limiting ropes 3 and at least two displacement preventing devices 1, one limiting rope 3 corresponds to one displacement preventing device 1, then the first end of each limiting rope 3 is connected with the displacement preventing cone prosthesis 2, and the second end of each limiting rope 3 is fixedly connected with one displacement preventing device 1.
In this embodiment, the use of the displacement prevention system will be described by taking the example that the displacement prevention system includes one displacement prevention cone prosthesis 2, one limit wire 3 and two displacement prevention devices 1.
The displacement-preventing vertebral body prosthesis 2 of the present embodiment is a conventional one-piece vertebral body prosthesis.
The application method of the embodiment is as follows: implanting the displacement-preventing vertebral body prosthesis 2 into a spinal operation place for fixation, and fixing the pedicle screws 4 and the connecting rods 5 of the nail rod system; passing the first end of the limit wire 3 through a limit groove (not shown in the figure) at the bottom of the anti-displacement cone prosthesis 2, and exposing the first end of the limit wire 2 from the other side of the anti-displacement cone prosthesis 2; the anti-displacement device 1 is respectively fixed on the connecting rods 5 above the two sides of the anti-displacement cone prosthesis 2, the anti-displacement device 1 is clamped with the connecting rods 5, and the anti-displacement device 1 is firmly clamped with the connecting rods 5 by utilizing the protrusions 15 of the anti-displacement device 1, so that the anti-displacement device 1 is prevented from being displaced on the connecting rods 5; after the locking mechanism 14 of the displacement preventing device 1 is unscrewed, the first end of the limiting rope 3 passes through the accommodating groove 12 of the displacement preventing device 1 on the corresponding side of the locking mechanism, and the second end of the limiting rope 3 passes through the accommodating groove 12 of the displacement preventing device 1 on the corresponding side of the locking mechanism, the locking devices of the two displacement preventing devices 1 are respectively screwed, and then the redundant limiting rope 3 is removed, so that the fixation of the displacement preventing system can be completed.
The embodiment has the advantages that after the anti-displacement vertebral body prosthesis is implanted, the anti-displacement device is utilized to connect the anti-displacement vertebral body prosthesis with the nail rod system, so that a whole is formed, the occurrence of displacement of the anti-displacement vertebral body prosthesis is avoided, and the fixation efficiency of vertebral body implantation is improved; simple operation and convenient use, and improves the long-term prognosis of the patients.
Example 2
This embodiment is a preferred embodiment of the present invention, which relates to two types of displacement prevention devices, namely, a displacement prevention device connected to a pedicle screw and a displacement prevention device connected to a connecting rod.
As shown in fig. 4 to 5, the displacement preventing device 1 connected with the pedicle screw includes a main body 11, a receiving groove 12, a connection mechanism 13 and a locking mechanism 14, the receiving groove 12 is provided on the main body 11, the connection mechanism 13 is provided at a lower end of the main body 11, and a first end of the locking mechanism 14 penetrates one side of the main body 11 and penetrates into the receiving groove 12.
The main body 11 is a U-shaped body with a nail hole in the center, the accommodating groove 12 is a U-shaped groove, the connecting mechanism 13 is a cylinder with external threads, the locking mechanism 14 is a screw, and the outer edge of the nut of the screw is an annular bulge.
As shown in fig. 6 to 7, the displacement preventing device 1 connected with the connecting rod includes a main body 11, a receiving groove 12, a connecting mechanism 13, a locking mechanism 14, and a stopper mechanism 16, the receiving groove 12 is provided on the main body 11, and the receiving groove 12 penetrates the main body 11 in a radial direction of the main body 11, the connecting mechanism 13 is provided at a lower end of the main body 11, the locking mechanism 14 is provided at one side of the main body 11 in a radial direction of the receiving groove 12, and a first end of the locking mechanism 14 penetrates one side of the main body 11 and penetrates into the receiving groove 12, the stopper mechanism 16 is provided at one side or both sides of the connecting mechanism 13 in a radial direction of the connecting mechanism 13, and a first end of each stopper mechanism 16 penetrates one side of the connecting mechanism 13 and penetrates into an inner side of the connecting mechanism 13.
Wherein, the main body 11 is a cylinder, the accommodating groove 12 is a U-shaped groove, the section of the connecting mechanism 13 is U-shaped, and the opening direction of the U-shaped of the connecting mechanism 13 is in the same direction with the axial direction of the main body 11.
Wherein, the limit mechanisms 16 are two, and are symmetrically arranged at two sides of the connecting mechanism 13.
The limiting mechanism 16 is a screw, a screw end of the limiting mechanism 16 is screwed in from the outer side of the connecting mechanism 13 to the inner side of the connecting mechanism 13, and the screw end of the limiting mechanism 16 enters the connecting mechanism 13.
In the present embodiment, the structure of the displacement preventing device 1 connected to the pedicle screw and the structure of the displacement preventing device 1 connected to the connecting rod are substantially the same, the difference is only the size, and the size of the connecting mechanism 13 of the displacement preventing device 1 connected to the pedicle screw is larger than the size of the connecting mechanism 13 of the displacement preventing device 1 connected to the connecting rod.
As shown in fig. 8, an anti-displacement system for internal fixation comprises an anti-displacement device 1, an anti-displacement cone prosthesis 2 and a limiting rope 3, wherein the limiting rope 3 is connected with the anti-displacement cone prosthesis 2 to form a U-shaped structure, the anti-displacement device 1 is symmetrically arranged at two sides of the anti-displacement cone prosthesis 2, and the limiting ropes 3 at two sides of the anti-displacement cone prosthesis 2 are respectively connected with the corresponding anti-displacement device 1.
In this embodiment, the connection mode between the limiting cord 3 and the displacement preventing cone prosthesis 2 is that two sides of the displacement preventing cone prosthesis 2 are respectively connected with at least one limiting cord 3, and then each displacement preventing system comprises at least one displacement preventing cone prosthesis 2, at least two limiting cords 3 and at least two displacement preventing devices 1, one limiting cord 3 corresponds to one displacement preventing device 1, then a first end of each limiting cord 3 is connected with the displacement preventing cone prosthesis 2, and a second end of each limiting cord 3 is fixedly connected with one displacement preventing device 1.
In this embodiment, the anti-displacement vertebral body prosthesis 2 is a detachable vertebral body prosthesis, i.e. comprises a vertebral body main body and two connecting parts connected with a first end and a second end of the vertebral body main body respectively.
And the two sides of the displacement-preventing vertebral body prosthesis 2 are respectively provided with a connecting device connected with the limiting rope 3.
In this embodiment, the method of using the displacement prevention system will be described by taking an example in which the displacement prevention system includes one displacement prevention cone prosthesis 2, six limit ropes 3 and six displacement prevention devices 1 (including four displacement prevention devices 1 connected to pedicle screws and two displacement prevention devices 1 connected to connecting rods).
The application method of the embodiment is as follows: implanting the displacement-preventing vertebral body prosthesis 2 into a spinal operation place for fixation, and fixing the pedicle screws 4 and the connecting rods 5 of the nail rod system; the first ends of the six limiting ropes 3 are respectively connected with six connecting devices (not shown in the figure) of the anti-displacement vertebral body prosthesis 2; unscrewing the limiting mechanisms 16 of the anti-displacement devices 1 connected with the connecting rods 5, respectively fixing one anti-displacement device 1 on the two connecting rods 5 above two sides of the anti-displacement cone prosthesis 2, connecting the anti-displacement devices 1 with the connecting rods 5, screwing the limiting mechanisms 16, firmly connecting the anti-displacement devices 1 with the connecting rods 5, and preventing the anti-displacement devices 1 from displacing on the connecting rods 5; the four anti-displacement devices 1 connected with the pedicle screws 4 are respectively connected with the corresponding pedicle screws 4, and the connecting mechanism 13 of the anti-displacement device 1 is screwed into the tail ends of the pedicle screws 4, so that the bottom ends of the connecting mechanism 13 are connected with the connecting rods 5; unscrewing the locking mechanism 14 of the displacement prevention device 1, screwing the locking mechanisms 14 of the six displacement prevention devices 1 respectively after the second end of each limit wire rope 3 passes through the accommodating groove 12 of the displacement prevention device 1 on the corresponding side of the corresponding limit wire rope, screwing the locking mechanism 14 of the displacement prevention device 1 connected with the pedicle screw 4 from the main body 11, connecting the locking mechanism 14 with the main body 11, the connecting mechanism 13 and the connecting rod 5 respectively, and pressing the limit wire rope 2 by the outer protrusions of the nuts of the locking mechanism 14; and then removing the redundant limiting ropes 3 to finish the fixation of the displacement prevention system.
The embodiment has the advantage that the anti-displacement vertebral body prosthesis is respectively connected with the adjacent pedicle screw and the connecting rod, so that the fixation degree of the vertebral body is further improved.
Example 3
This embodiment is a preferred embodiment of the present invention, and as shown in fig. 9 to 10, an anti-displacement device for internal fixation, the anti-displacement device 1 includes a main body 11, a receiving groove 12, a connecting mechanism 13, a locking mechanism 14, and a stopper mechanism 16, the receiving groove 12 is provided on the main body 11, and the receiving groove 12 penetrates the main body 11 in a radial direction of the main body 11, the connecting mechanism 13 is provided at a lower end of the main body 11, the locking mechanism 14 is provided on one side of the main body 11 in the radial direction of the receiving groove 12, and a first end of the locking mechanism 14 penetrates one side of the main body 11 and penetrates into the receiving groove 12, the stopper mechanism 16 is provided on one side or both sides of the connecting mechanism 13 in the radial direction of the connecting mechanism 13, and a first end of each stopper mechanism 16 penetrates one side of the connecting mechanism 13 and penetrates into an inner side of the connecting mechanism 13.
Wherein, the main body 11 is a cylinder, the accommodating groove 12 is a U-shaped groove, and the section of the connecting mechanism 13 is O-shaped.
Wherein, the limit mechanism 16 is three, and the annular symmetry sets up on coupling mechanism 13.
The limiting mechanism 16 is a screw, a screw end of the limiting mechanism 16 is screwed in from the outer side of the connecting mechanism 13 to the inner side of the connecting mechanism 13, and the screw end of the limiting mechanism 16 enters the connecting mechanism 13.
As shown in fig. 11, an anti-displacement system for internal fixation comprises an anti-displacement device 1, an anti-displacement cone prosthesis 2 and a limiting rope 3, wherein the limiting rope 3 is connected with the anti-displacement cone prosthesis 2 to form a U-shaped structure, the anti-displacement device 1 is symmetrically arranged at two sides of the anti-displacement cone prosthesis 2, and the limiting ropes 3 at two sides of the anti-displacement cone prosthesis 2 are respectively connected with the corresponding anti-displacement device 1.
In this embodiment, the connection mode between the limiting cord 3 and the displacement preventing cone prosthesis 2 is that two sides of the displacement preventing cone prosthesis 2 are respectively connected with at least one limiting cord 3, and then each displacement preventing system comprises at least one displacement preventing cone prosthesis 2, at least two limiting cords 3 and at least two displacement preventing devices 1, one limiting cord 3 corresponds to one displacement preventing device 1, then a first end of each limiting cord 3 is connected with the displacement preventing cone prosthesis 2, and a second end of each limiting cord 3 is fixedly connected with one displacement preventing device 1.
In this embodiment, the anti-displacement vertebral body prosthesis 2 is a length-adjustable vertebral body prosthesis, i.e. comprising a vertebral body main body and a secondary vertebral body with length adjustment.
And the two sides of the displacement-preventing cone prosthesis 2 are respectively provided with a limiting groove for accommodating the limiting rope 3, and the limiting rope 3 is integrally connected with the displacement-preventing cone prosthesis 2.
In this embodiment, the use of the displacement prevention system will be described by taking the example that the displacement prevention system includes one displacement prevention cone prosthesis 2, two limit ropes 3 and two displacement prevention devices 1.
The application method of the embodiment is as follows: implanting the displacement-preventing vertebral body prosthesis 2 into a spinal operation place for fixation, and fixing the pedicle screws 4 and the connecting rods 5 of the nail rod system; pulling out the first ends of the two limiting ropes 3 from two limiting grooves (not shown in the figure) of the anti-displacement vertebral body prosthesis 2 respectively; unscrewing the limiting mechanism 16 of each anti-displacement device 1, respectively fixing one anti-displacement device 1 on two connecting rods 5 above two sides of the anti-displacement cone prosthesis 2, connecting the anti-displacement device 1 with the connecting rods 5, screwing the limiting mechanism 16, firmly connecting the anti-displacement device 1 with the connecting rods 5, and preventing the anti-displacement device 1 from displacing on the connecting rods 5; after the locking mechanism 14 of the displacement prevention device 1 is unscrewed, the second end of each limiting rope 3 passes through the accommodating groove 12 of the displacement prevention device 1 on the corresponding side, the locking mechanisms 14 of the two displacement prevention devices 1 are respectively screwed, and then the redundant limiting ropes 3 are removed, so that the fixation of the displacement prevention system can be completed.
Example 4
This embodiment is a preferred embodiment of the present invention, as shown in fig. 12 to 13, an anti-displacement device for internal fixation, the anti-displacement device 1 includes a main body 11, a receiving groove 12, a connecting mechanism 13 and a locking mechanism 14, the receiving groove 12 is provided on the main body 11, and the receiving groove 12 penetrates the main body 11 in a radial direction of the main body 11, the connecting mechanism 13 is provided at a lower end of the main body 11, the locking mechanism 14 is provided at one side of the main body 11 in the radial direction of the receiving groove 12, and a first end of the locking mechanism 14 is deep into the receiving groove 12 and connected with the main body 11.
Wherein, the main body 11 is a cylinder, the accommodating groove 12 is a U-shaped groove, and the section of the connecting mechanism 13 is O-shaped.
Further, the locking mechanism 14 penetrates the main body 11 and the connection mechanism 13, and penetrates into the connection cavity of the connection mechanism 13.
Further, the locking mechanism 14 is a screw, including a nut and a threaded rod, wherein a first end of the nut is connected to a second end of the threaded rod, and an annular protrusion is provided on an outer edge of the first end of the nut.
As shown in fig. 14, the connecting mechanism 13 has a "C" shape in cross section.
As shown in fig. 15, an anti-displacement system for internal fixation comprises an anti-displacement device 1, an anti-displacement cone prosthesis 2 and a limiting rope 3, wherein the limiting rope 3 is connected with the anti-displacement cone prosthesis 2 to form a U-shaped structure, the anti-displacement device 1 is symmetrically arranged at two sides of the anti-displacement cone prosthesis 2, and the limiting ropes 3 at two sides of the anti-displacement cone prosthesis 2 are respectively connected with the corresponding anti-displacement device 1.
In this embodiment, the connection mode between the limiting cord 3 and the displacement preventing cone prosthesis 2 is that two sides of the displacement preventing cone prosthesis 2 are respectively connected with at least one limiting cord 3, and then each displacement preventing system comprises at least one displacement preventing cone prosthesis 2, at least two limiting cords 3 and at least two displacement preventing devices 1, one limiting cord 3 corresponds to one displacement preventing device 1, then a first end of each limiting cord 3 is connected with the displacement preventing cone prosthesis 2, and a second end of each limiting cord 3 is fixedly connected with one displacement preventing device 1.
In this embodiment, the anti-displacement vertebral body prosthesis 2 is a length-adjustable vertebral body prosthesis, i.e. comprising a vertebral body main body and a secondary vertebral body with length adjustment.
And the two sides of the displacement-preventing cone prosthesis 2 are respectively provided with a limiting groove for accommodating the limiting rope 3, and the limiting rope 3 is integrally connected with the displacement-preventing cone prosthesis 2.
Further, the first end of the limit cord 3 is exposed outside the limit groove, and the first end of the limit cord 3 has a spherical anti-return device.
In this embodiment, the use of the displacement prevention system will be described by taking the example that the displacement prevention system includes one displacement prevention cone prosthesis 2, two limit ropes 3 and two displacement prevention devices 1.
The application method of the embodiment is as follows: implanting the displacement-preventing vertebral body prosthesis 2 into a spinal operation place for fixation, and fixing the pedicle screws 4 and the connecting rods 5 of the nail rod system; pulling out the first ends of the two limiting ropes 3 from two limiting grooves (not shown in the figure) of the anti-displacement vertebral body prosthesis 2 respectively; unscrewing the locking mechanism 14 of the anti-displacement device 1, respectively fixing one anti-displacement device 1 on the two connecting rods 5 above two sides of the anti-displacement cone prosthesis 2, and connecting the anti-displacement device 1 with the connecting rods 5; after the second end of each spacing rope 3 passes through the accommodating groove 12 of the corresponding side anti-displacement device 1, the locking mechanisms 14 of the two anti-displacement devices 1 are respectively screwed so that the locking mechanisms 14 sequentially fix the spacing ropes 3 and the connecting rods 5, and then the redundant spacing ropes 3 are removed, so that the fixation of an anti-displacement system can be completed.
In the embodiment, each anti-displacement device completes the locking of the limiting rope and the connecting rod through one locking mechanism, so that the operation is simplified; two locking blocks are arranged at the bottom of a nut of the locking mechanism, so that when the locking mechanism locks the limiting rope, the limiting rope is only fixed through the locking blocks, and the limiting rope is tightly connected with a screw of the locking mechanism and a limiting block through the pressing action; in addition, utilize locking mechanical system to lock from top to bottom for spacing cotton rope can carry out quick split with anti-displacement device, and spacing cotton rope can remove from the notch top in U-shaped groove of main part promptly, avoids spacing cotton rope to only can follow the axial of holding tank and withdraws from and the operation that brings long-time, complex operation scheduling problem.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.
Claims (5)
1. An anti-displacement device for internal fixation, applied to vertebral body reconstruction, characterized in that the anti-displacement device (1) comprises:
a main body (11), wherein the main body (11) is provided with a containing groove (12), the containing groove (12) is arranged at the upper part of the main body (11), and the containing groove (12) penetrates through the main body (11) along the radial direction of the main body (11); the main body (11) is in a shape of a 'back';
the connecting mechanism (13), the connecting mechanism (13) is arranged at the lower end of the main body (11), and the main body (11) is detachably connected with the pedicle screw tail or the connecting rod of the rod nailing system through the connecting mechanism (13);
a locking mechanism (14), wherein the locking mechanism (14) is respectively connected with the main body (11) and the accommodating groove (12);
the locking mechanism (14) is arranged on one side of the main body (11) along the radial direction of the accommodating groove (12), and the first end of the locking mechanism (14) penetrates into the accommodating groove (12) and is connected with the main body (11);
the locking mechanism (14) penetrates through the main body (11) and the connecting mechanism (13) and goes deep into a connecting cavity of the connecting mechanism (13);
the locking mechanism (14) is a screw and comprises a nut and a screw rod, wherein the first end of the nut is connected with the second end of the screw rod, and an annular protrusion is arranged on the outer edge of the first end of the nut.
2. The displacement prevention device according to claim 1, wherein the cross section of the connecting means (13) is "U" or "O" shaped.
3. The displacement prevention device according to claim 2, wherein the inner side surface of the connecting means (13) is provided with a plurality of protrusions (15).
4. The displacement prevention device according to claim 2, further comprising a limiting mechanism (16), the limiting mechanism (16) being arranged radially to the connection mechanism (13), a first end of the limiting mechanism (16) passing through the connection mechanism (13) and being connected to the pedicle screw tail or the connecting rod.
5. An anti-displacement system for internal fixation, comprising:
an anti-displacement vertebral body prosthesis (2);
the limiting ropes (3) are arranged on two sides of the anti-displacement cone prosthesis (2), and the limiting ropes (3) are connected with the anti-displacement cone prosthesis (2) and form a U-shaped structure;
the anti-displacement device (1) is arranged above two sides of the anti-displacement vertebral body prosthesis (2), and the anti-displacement device (1) is connected with the limiting ropes (3) in a one-to-one correspondence manner;
the displacement prevention device (1) according to any one of claims 1-4;
when in use, the anti-displacement vertebral body prosthesis (2) is implanted into a spinal operation position for fixation, and pedicle screws (4) and connecting rods (5) of the nail rod system are fixed; the first ends of the two limiting ropes (3) are respectively pulled out of the two limiting grooves of the anti-displacement cone prosthesis (2); unscrewing a locking mechanism (14) of the anti-displacement device (1), respectively fixing one anti-displacement device (1) on two connecting rods (5) above two sides of the anti-displacement cone prosthesis (2), and connecting the anti-displacement device (1) with the connecting rods (5); after the second end of each limiting rope (3) passes through the accommodating groove (12) of the corresponding side anti-displacement device (1), the locking mechanisms (14) of the two anti-displacement devices (1) are respectively screwed so that the locking mechanisms (14) sequentially fix the limiting ropes (3) and the connecting rod (5), and then the redundant limiting ropes (3) are removed, so that the fixation of the anti-displacement system can be completed.
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| CN201811552319.XA CN109528280B (en) | 2018-12-19 | 2018-12-19 | Anti-displacement device and anti-displacement system for internal fixation |
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| CN201811552319.XA CN109528280B (en) | 2018-12-19 | 2018-12-19 | Anti-displacement device and anti-displacement system for internal fixation |
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| CN109528280A (en) | 2019-03-29 |
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