CN113768603A - Universal pedicle screw fixing device and mounting tool thereof - Google Patents
Universal pedicle screw fixing device and mounting tool thereof Download PDFInfo
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- CN113768603A CN113768603A CN202111086610.4A CN202111086610A CN113768603A CN 113768603 A CN113768603 A CN 113768603A CN 202111086610 A CN202111086610 A CN 202111086610A CN 113768603 A CN113768603 A CN 113768603A
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- 238000009434 installation Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 abstract description 11
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- 241001079814 Symphyotrichum pilosum Species 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
-
- 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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
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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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/862—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the periphery of the screw head
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- 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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
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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
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
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Abstract
The invention discloses a universal pedicle screw fixing device and an installation tool thereof, wherein the fixing device can prevent a ball head screw from rotating relative to a screw seat to cause unsatisfactory opening effect between centrums, and comprises: a ball screw having a ball head; the screw seat is sequentially provided with a first screw hole, a second screw hole and a first screw hole, the inner peripheral surface of the first screw hole is a spherical surface matched with the ball head part, the screw seat is provided with a U-shaped opening extending from the first screw hole to the second screw hole, and the two openings are positioned on the front side and the rear side of the screw seat; the locking screw plug is connected with the second screw hole and is abutted against the ball head part; the connecting rod is horizontally clamped in the opening; and the self-breaking screw plug is connected with the first screw hole and is abutted against the connecting rod. The mounting tool comprises a holding part, a connecting rod part, a connecting part and a clamping block, wherein the connecting part is provided with a clamping hole clamped with the self-breaking screw plug, the outer wall surface of the connecting part is provided with a second through hole communicated with the clamping hole, one end of the clamping block is connected with the connecting part, and the other end of the clamping block penetrates through the second through hole and is abutted to the self-breaking screw plug.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a universal pedicle screw fixing device and an installation tool thereof.
Background
With the continuous development of modern medical technology and the perfection of surgical treatment technology and tools, the treatment of spine and cervical vertebra related diseases by applying vertebral body (including spine and cervical vertebra) posterior nail-rod system products becomes a normal state. The traditional vertebral body posterior screw product is generally a universal screw, a screw is placed into the vertebral pedicle or vertebral plate of a patient in the process of clinical operation, then a connecting rod is installed, and finally the connecting rod and the screw are fixed together by a locking screw plug to complete the fixation operation.
The traditional vertebral body posterior screw has the following defects in clinical use: (1) before the screw plug and the connecting rod are used for final locking, the ball head screw can rotate freely relative to the screw seat, so that when cervical vertebra stretching/pressurizing is needed, only the screw seat moves, the ball head screw cannot move, and the expected stretching/pressurizing effect cannot be achieved. And if adopt one-way nail, because put the problem of nail angle, can lead to going up excellent difficulty, can even because need be to good connective bar, compelled to twist more and move half a circle or move back half a circle, lead to one-way nail to take place to become flexible easily and move back the nail even.
(2) When the traditional locking screw plug is finally locked, the locking screw plug is mainly locked by the hand feeling of a doctor, so that the locking screw plug is loosened due to insufficient locking force of part of doctors, and the fixing fails; some doctors can cause the deformation and crack of the locking screw plug or the deformation and failure of the locking tool due to the overlarge locking force.
Disclosure of Invention
The invention aims to provide a universal pedicle screw fixing device to solve one or more technical problems in the prior art.
In addition, the invention also provides an installation tool applied to the universal pedicle screw fixing device.
The technical scheme adopted for solving the technical problems is as follows:
in a first aspect, the present invention provides a universal pedicle screw fixation device, comprising: a ball screw having a ball head; the screw seat is provided with a first screw hole, a second screw hole and a first screw hole, the second screw hole and the first screw hole are sequentially arranged along the length direction of the screw seat and are communicated, the inner peripheral surface of the first screw hole is a spherical surface matched with the ball head part, the screw seat is provided with a U-shaped opening, the opening extends from the first screw hole to the second screw hole, and the two openings are respectively positioned on the front side and the rear side of the screw seat; the locking screw plug is connected with the second screw hole and is abutted against the ball head part; the connecting rod is clamped in the opening, and the length direction of the connecting rod is perpendicular to the length direction of the screw seat; and the self-breaking screw plug is connected with the first screw hole and is abutted against the connecting rod.
The invention has at least the following beneficial effects: the screw seat is provided with a first screw hole, a second screw hole and a first screw hole, and the spherical head part of the ball head screw is arranged in the first screw hole and can rotate relative to the screw seat so as to adjust the angle of the ball head screw relative to the screw seat; the ball head screw and the screw seat are locked together by screwing the locking plug screw into the second screw hole, so that the phenomenon that the pressing or opening effect between the centrums is not ideal due to the fact that the ball head screw rotates relative to the screw seat when the subsequent movable screw seat is pressed or opened is prevented; the opening of screw seat is arranged in to the connective bar to will certainly break the plug screw precession first screw, will connect the bar and fix mutually with the screw seat, moreover, will certainly break the plug screw and screw up until will certainly break the plug screw and twist off, reach anticipated locking effect, adopt certainly break the plug screw, can avoid appearing leading to the connective bar to fix failure because of the locking force is not enough, perhaps lead to traditional locking plug screw to warp because of the locking force is too big, burst or locking tool warp inefficacy.
As a further improvement of the above technical solution, the self-breaking screw plug includes a clamping portion and a first threaded portion; joint portion with first screw thread portion integrated into one piece, the plug screw is equipped with the first recess that is the V-arrangement from breaking, first recess encircles the junction setting of joint portion and first screw thread portion.
The self-breaking screw plug comprises a clamping portion and a first thread portion, the clamping portion and the first thread portion are integrally formed, and after the self-breaking screw plug is subjected to a certain acting force, the clamping portion and the first thread portion can be disconnected, so that the universal pedicle screw fixing device is suitable for different operators, and the phenomenon that a connecting rod is loosened due to insufficient locking force or a product or an installation tool fails during locking due to overlarge locking force can be prevented; encircle the joint setting of joint portion and first screw thread portion is the first recess of V-arrangement, can reduce joint strength between joint portion and the first screw thread portion, and then uses less torsion alright realize that joint portion and first screw thread portion break off, play laborsaving effect.
As a further improvement of the above technical solution, the first thread portion is provided with a first inner corner hole, the clamping portion is provided with a first through hole, and the first through hole and the first inner corner hole are oppositely arranged and communicated. The first thread part is provided with a first inner angle hole, and when the clamping part is disconnected with the first thread part and a nail dismounting operation is needed, the first inner angle hole is rotated to realize that the first thread part is dismounted from the first screw hole; the clamping portion is provided with a first through hole, and when the first inner corner hole is formed and manufactured through self-breaking screw plug forming, an operation space can be provided.
As a further improvement of the technical scheme, the self-breaking screw plug is provided with a V-shaped second groove which is arranged around the joint of the first through hole and the first inner corner hole. The second recess that is the V-arrangement is set up around the junction of first through-hole and first inner corner hole, can further reduce joint strength between joint portion and the first screw thread portion to reduce the operation degree of difficulty to the plug screw of autotomying.
As a further improvement of the above technical scheme, the clamping portion is provided with an arc-shaped groove, the arc-shaped groove surrounds the outer peripheral surface of the clamping portion and is provided with a plurality of grooves, and the arc-shaped groove extends downwards from the upper end surface of the clamping portion. The outer peripheral face interval that encircles joint portion sets up a plurality of arc recesses, and the arc recess down extends from the up end of joint portion, sets up a plurality of arc recesses, can provide a plurality of buckle structures to increase the lifting surface area of joint portion, thereby realize the high-efficient transmission of torsion.
As a further improvement of the above technical solution, the locking plug screw is provided with a second inner corner hole and a second screw hole, the second inner corner hole and the second screw hole are sequentially arranged along the axial direction of the locking plug screw, and the inner peripheral surface of the second screw hole is a spherical surface matched with the ball head part. The locking screw plug is provided with a second inner angle hole, so that the second inner angle hole can be conveniently rotated to be screwed into the second screw hole; and the locking plug screw is provided with a second screw hole, and after the angle adjustment of the ball screw relative to the screw seat is finished, the second screw hole is matched with the first screw hole to apply larger resistance to the ball head part of the ball screw so as to prevent the ball screw from rotating relative to the screw seat.
As a further improvement of the technical scheme, the lower end face of the screw seat is provided with a plurality of concave faces which are uniformly arranged at intervals around the first screw hole, and the concave faces are connected with the inner wall face of the first screw hole. The lower end face of the screw seat is provided with a plurality of concave surfaces connected with the inner wall face of the first screw hole, so that the ball head screw can swing to the concave surfaces, and large-angle swing is realized.
As a further improvement of the technical scheme, three concave surfaces are arranged. Three concave surfaces are arranged and are separated by 120 degrees, so that the ball head screw can swing in three directions at large angles.
In a second aspect, the invention provides an installation tool, which comprises a holding part, a connecting rod part, a connecting part and a fixture block, wherein the holding part, the connecting rod part and the connecting part are sequentially connected, the connecting part is provided with a fixture hole, the fixture hole can be clamped with the self-breaking screw plug of the universal pedicle screw fixing device, the outer wall surface of the connecting part is provided with a second through hole, the second through hole is communicated with the fixture hole, one end of the fixture block is connected with the connecting part, and the other end of the fixture block penetrates through the second through hole and can be abutted against the self-breaking screw plug.
The connecting rod part connects the holding part with the connecting part, and torque force is transmitted through the connecting rod part, and the connecting part is provided with a clamping hole clamped with the self-breaking screw plug and can screw the self-breaking screw plug into the first screw hole; and, the outer wall surface of connecting portion sets up the second through-hole, and the one end and the connecting portion of fixture block are connected, and the other end passes the second through-hole and with from disconnected plug screw butt, make from disconnected plug screw disconnection back, can stay the joint portion of self-breaking plug screw in the card downthehole, avoid joint portion to fall into the operation region.
As a further improvement of the above technical scheme, the fixture block includes fixed part and arc portion, the plug screw includes joint portion and first screw thread portion from breaking, the fixed part with arc portion connects, the fixed part with connecting portion connect, arc portion certainly the fixed part is past the second through-hole extends, the convex surface of arc portion is located in the fixture hole and can with joint portion butt.
Be connected with connecting portion through the fixed part, make the relative connecting portion of one end of fixture block fixed, arc portion extends from the fixed part toward the second through-hole, and, the convex surface of arc portion passes the second through-hole and arranges the card downthehole in, can exert to the outer wall that lies in the joint portion in the card downthehole and compress tightly the effort, after joint portion and first screw thread portion disconnection, joint portion still lies in the card downthehole under the effect that compresses tightly, can remove along with connecting portion, retrieve, avoid joint portion to fall into the operation region with injury patient's nervous tissue.
Drawings
The invention is further described with reference to the accompanying drawings and examples;
FIG. 1 is an exploded view of a universal pedicle screw fixation device according to an embodiment of the invention;
fig. 2 is a perspective view of a self-breaking screw plug according to an embodiment of the present invention;
fig. 3 is a schematic view of an internal structure of a self-breaking screw plug according to an embodiment of the present invention;
fig. 4 is a perspective view of a locking plug screw provided in an embodiment of the present invention;
fig. 5 is a schematic view of an internal structure of a lock plug according to an embodiment of the present invention;
FIG. 6 is a perspective view of a screw base provided by an embodiment of the present invention;
FIG. 7 is a schematic view of the internal structure of a screw base according to an embodiment of the present invention;
FIG. 8 is a perspective view of a ball screw provided in accordance with an embodiment of the present invention;
FIG. 9 is a perspective view of an installation tool provided by an embodiment of the present invention;
fig. 10 is an enlarged view of a portion a in fig. 9;
fig. 11 is a perspective view of a cartridge provided in an embodiment of the present invention.
The drawings are numbered as follows: 100. self-breaking screw plugs; 110. a clamping part; 111. a convex surface; 112. an arc-shaped groove; 113. a first through hole; 120. a first threaded portion; 121. a first inner corner hole; 130. a first groove; 140. a second groove; 200. a connecting rod; 300. locking a screw plug; 310. a second inner corner hole; 320. a second screw hole; 400. a screw seat; 410. an opening; 420. a concave surface; 430. a first screw hole; 440. a second screw hole; 450. a first screw hole; 500. a ball head screw; 510. a ball head portion; 511. a third inner corner hole; 520. a cylindrical portion; 530. a second threaded portion; 610. a grip portion; 620. a link section; 630. a connecting portion; 631. a clamping hole; 632. a second through hole; 640. a clamping block; 641. a fixed part; 642. an arc-shaped portion.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are described, it means one or more, a plurality is two or more, more than, less than, more than, etc. are understood as not including the present number, and more than, less than, etc. are understood as including the present number. If any description to first, second and third is only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
It should be noted that the direction X in the drawings is from the posterior side to the anterior side of the universal pedicle screw fixation device; the Y direction is from the left side to the right side of the universal pedicle screw fixing device; the Z direction is directed from the lower side to the upper side of the universal pedicle screw fixation device.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 11, several embodiments of the universal pedicle screw fixation device and its installation tool of the present invention will be described.
As shown in fig. 1 to 8, a universal pedicle screw fixation device according to a first embodiment of the present invention includes a ball screw 500, a screw seat 400, a locking plug screw 300, a connecting rod 200, and a self-breaking plug screw 100.
The ball screw 500 has a ball portion 510, a cylindrical portion 520, and a second threaded portion 530. The ball head portion 510, the cylindrical portion 520, and the second threaded portion 530 are sequentially connected, and in this embodiment, the ball head portion 510, the cylindrical portion 520, and the second threaded portion 530 are integrally formed. The upper end surface of the ball head portion 510 is provided with a third inner angle hole 511, and the third inner angle hole 511 may be provided with an inner hexagonal hole, a quincuncial hole and the like, so that an operator can conveniently screw the ball head screw 500 into a vertebral body of a patient by using a tool. The ball screw 500 is an existing product, and the detailed structure thereof is not described again.
The screw base 400 is provided with a first screw hole 430, a second screw hole 440 and a first screw hole 450, the first screw hole 430, the second screw hole 440 and the first screw hole 450 are sequentially arranged along the length direction (i.e. along the up-down direction) of the screw base 400 and are communicated, and the axes of the first screw hole 430, the second screw hole 440 and the first screw hole 450 are overlapped. In the present embodiment, the diameter of the first screw hole 430 is larger than that of the second screw hole 440, and the diameter of the second screw hole 440 is larger than that of the first screw hole 450.
The inner peripheral surface of the first screw hole 450 is a spherical surface adapted to the ball head portion 510, and after the ball head screw 500 sequentially passes through the first screw hole 430, the second screw hole 440 and the first screw hole 450, the ball head portion 510 is disposed at the first screw hole 450, so that the angle of the ball head screw 500 relative to the screw base 400 can be adjusted.
The screw base 400 is provided with an opening 410 having a U-shape, the opening 410 extends from the first screw hole 430 to the second screw hole 440, and the openings 410 are provided two and respectively located at the front side and the rear side of the screw base 400 so that the connection rod 200 can be placed in the opening 410 from the top down. Specifically, the front side wall and the rear side wall of the screw seat 400 are recessed from top to bottom to form an opening 410, and the opening direction of the opening 410 is upward.
Further, the screw holder 400 has a concave surface 420 on the lower end surface thereof, the concave surfaces 420 are provided in a plurality at regular intervals around the first screw hole 450, and the concave surfaces 420 are in contact with the inner wall surface of the first screw hole 450. In this embodiment, three concave surfaces 420 are provided, and two adjacent concave surfaces 420 are separated by 120 °, so that the cylindrical portion 520 of the ball screw 500 is in contact with the concave surfaces 420, thereby realizing large-angle swing of the ball screw 500 relative to the screw base 400, and meeting clinical use requirements under more conditions.
The lock plug screw 300 is connected to the second screw hole 440 and abuts against the ball head portion 510. Specifically, the locking plug screw 300 is provided with a second inner corner hole 310 and a second screw hole 320, the second inner corner hole 310 and the second screw hole 320 are sequentially arranged along the axial direction of the locking plug screw 300, that is, the axes of the second inner corner hole 310 and the second screw hole 320 coincide, and the inner circumferential surface of the second screw hole 320 is a spherical surface matched with the spherical head portion 510.
In this embodiment, the second inside corner hole 310 communicates with the second screw hole 320. The second inner corner hole 310 may be an inner quadrangular hole, an inner hexagonal hole or a quincuncial hole, which facilitates the use of an existing tool to screw the locking plug screw 300 into the second screw hole 440, and after the position of the ball screw 500 relative to the screw seat 400 is adjusted, the locking plug screw 300 is tightened to urge the locking plug screw 300 to exert a pressing force on the ball screw 500, so as to ensure that the ball screw 500 is fixed relative to the screw seat 400. The second screw hole 320 is configured to cooperate with the first screw hole 450 to provide greater resistance to the ball portion 510 of the ball screw 500 to prevent rotation of the ball screw 500 relative to the screw base 400 during compression or distraction of the vertebral bodies.
The connecting rod 200 is a cylindrical rod, the connecting rod 200 is clamped in the opening 410, the length direction of the connecting rod 200 is perpendicular to the length direction of the screw seat 400, and in the embodiment, two ends of the connecting rod 200 extend along the front-back direction. The diameter of the connecting rod 200 is matched with the opening 410, namely the wall surface of the opening 410 is contacted with the outer wall surface of the connecting rod 200, so that the connecting rod 200 is limited, and the connecting rod 200 is prevented from moving left and right relative to the screw seat 400.
The self-breaking screw plug 100 is connected to the first screw hole 430 and abuts against the connecting rod 200. Specifically, the self-breaking screw plug 100 includes a clamping portion 110 and a first threaded portion 120. Joint portion 110 and first screw thread portion 120 integrated into one piece, break plug screw 100 certainly and be equipped with first recess 130 that is the V-arrangement, first recess 130 encircles the junction setting of joint portion 110 and first screw thread portion 120, the wall thickness of the junction that has also reduced joint portion 110 and first screw thread portion 120, reduce joint portion 110 and the joint strength between the first screw thread portion 120, and then use less torsion alright realize that joint portion 110 and first screw thread portion 120 break off, play laborsaving effect.
In addition, the first thread portion 120 is provided with a first inner corner hole 121, the clamping portion 110 is provided with a first through hole 113, the first through hole 113 and the first inner corner hole 121 are oppositely arranged and communicated, that is, the axes of the first through hole 113 and the first inner corner hole 121 coincide. The first through hole 113 may be a square hole or a circular hole, the first inner corner hole 121 may be a square inner hole, a hexagonal inner hole or a quincuncial inner hole, and the diameter of the first through hole 113 is larger than that of the first inner corner hole 121.
The first through hole 113 is provided to provide an operation space when the self-breaking plug screw 100 is molded and the first inner corner hole 121 is manufactured. After the fastening part 110 is disconnected from the first screw part 120, the first inner corner hole 121 is rotated by using an existing tool to detach the first screw part 120 from the first screw hole 430, so that the nail removing operation is performed on the patient.
Further, the self-breaking screw plug 100 is provided with a V-shaped second groove 140, the second groove 140 is arranged around the joint of the first through hole 113 and the first inner corner hole 121, the wall thickness of the joint of the clamping portion 110 and the first thread portion 120 is further reduced, and the connection strength between the clamping portion 110 and the first thread portion 120 is reduced, so that the operation difficulty of the self-breaking screw plug 100 is reduced, and the self-breaking screw plug is suitable for different clinicians.
Specifically, the clamping portion 110 is provided with an arc-shaped groove 112, the arc-shaped groove 112 is provided in a plurality of surrounding positions around the outer peripheral surface of the clamping portion 110, and the arc-shaped groove 112 extends downwards from the upper end surface of the clamping portion 110. In this embodiment, eight arc-shaped grooves 112 are uniformly spaced around the outer circumferential surface of the cylindrical body to form the clamping portion 110. The outer wall surface between two adjacent arc-shaped grooves 112 is a convex surface 111.
Of course, it is not excluded that the outer circumferential surface of the cylindrical body is provided with a convex strip to form the clamping portion 110.
In addition, as shown in fig. 9 to 11, the first embodiment of the present invention provides an installation tool, which includes a grip portion 610, a link portion 620, a connection portion 630 and a latch 640.
The grip portion 610, the link portion 620, and the connecting portion 630 are sequentially connected, and in the present embodiment, the grip portion 610, the link portion 620, and the connecting portion 630 are integrally formed. The holding portion 610 is a cross bar, the upper end of the connecting rod portion 620 is connected with the middle portion of the holding portion 610, and the connecting rod portion 620 is perpendicular to the holding portion 610.
Connecting portion 630 is equipped with card hole 631, and card hole 631 can with the joint portion 110 joint of self-breaking plug screw 100, also promptly after joint portion 110 arranged in card hole 631, the outer peripheral wall of joint portion 110 and the interior peripheral wall of card hole 631 laminate mutually, make connecting portion 630 can drive joint portion 110 and rotate. The outer wall surface of the connection portion 630 is provided with a second through hole 632, and the second through hole 632 may be a square hole. The second through hole 632 is communicated with the blocking hole 631, one end of the blocking block 640 is connected to the connecting portion 630, and the other end of the blocking block 640 passes through the second through hole 632 and can be abutted against the outer wall surface of the blocking portion 110 of the self-breaking screw plug 100, so that a pressing acting force can be applied.
Specifically, the latch 640 includes a fixing portion 641 and an arc portion 642, the fixing portion 641 is integrally connected with the arc portion 642, the fixing portion 641 is fixedly connected with the connecting portion 630 by a screw connection or a welding method, the arc portion 642 extends from the fixing portion 641 to the second through hole 632, and two ends of the arc portion 642 are higher than a middle portion thereof, so that the middle portion of the arc portion 642 can extend into the second through hole 632, that is, the arc portion 642 protrudes toward the second through hole 632.
The convex surface of the arc portion 642 is located in the engaging hole 631 and can abut against the outer wall surface of the engaging portion 110. In the present embodiment, the convex surface of the arc portion 642 abuts against the convex surface 111 of the snap portion 110. When the fastening portion 110 of the self-breaking screw plug 100 is inserted into the fastening hole 631, the fastening portion 110 can push the arc portion 642 open (i.e., the arc portion 642 deforms to a certain extent relative to the fixing portion 641), and move to a proper position in the fastening hole 631, and at this time, the arc portion 642 applies a pressing force to the fastening portion 110, so that the fastening portion 110 can be ensured to remain in the fastening hole 631 after the fastening portion 110 is disconnected from the first threaded portion 120.
During clinical operation, an operation space is firstly opened from the posterior spinal column, the operation is performed according to the operation mode of a normal posterior spinal column screw rod system product, and the universal pedicle screw fixing device is installed after the focus is removed.
First, a surgical instrument is used to open a screw hole at a preset screw position of a patient, a screw channel is established, the ball screw 500 is screwed in along the screw channel by using a screw driving tool until the second thread part 530 is submerged in a vertebral body, and the steps are repeated to screw in all the ball screws 500. At this time, the ball screw 500 passes through the first screw hole 450 of the screw base 400, that is, the ball screw 500 is coupled to the screw base 400.
Then, the screw base 400 is arranged according to the preset matching direction and angle with the connecting rod 200, the locking screw plug 300 is screwed by a screw plug rotating tool, the ball screws 500 are pressed and fixed, and according to the step, all the ball screws 500 are correspondingly fixed with the screw base 400.
Next, the connecting rod 200 is bent by a surgical tool to conform to the physiological curvature of the spine of the patient, and the connecting rod 200 is inserted into the opening 410 of the screw holder 400.
Subsequently, the clamping portion 110 of the self-breaking screw plug 100 is inserted into the clamping hole 631 of the connecting portion 630, and the first threaded portion 120 of the self-breaking screw plug 100 is screwed into one of the screw seats 400 by rotating the hand-held grip portion 610 until the clamping portion 110 and the first threaded portion 120 are disconnected. At this time, the lower end of the first screw portion 120 abuts against the connecting rod 200, and the upper end of the locking plug screw 300 abuts against the connecting rod 200, thereby achieving locking and fixing of the connecting rod 200 and the locking plug screw 300. Subsequently, the connection portion 630 and the clip portion 110 are pulled out from the first screw hole 430, and the clip portion 110 is taken out from the clip hole 631 and recovered.
Then, the fastening portion 110 of another self-breaking screw plug 100 is inserted into the fastening hole 631 of the connecting portion 630, the holding portion 610 is rotated to screw the self-breaking screw plug 100 into another screw seat 400 on the same side, but the first threaded portion 120 of the self-breaking screw plug 100 cannot be pressed against the connecting rod 200, a certain gap is reserved between the first threaded portion 120 and the connecting rod 200, and then an opening/pressing surgical tool is used to open/press the screw seats 400 of two ball screws 500 connected to the vertebral bodies, so that the screw seat 400 can slide along the connecting rod 200 (the two ends of one connecting rod 200 are respectively connected to the two screw seats 400), and at the same time, because the locking screw plug 300 has fixed the ball screws 500 and the screw seat 400, the screw seat 400 can drive the vertebral bodies to move, and the opening/pressing effect between the vertebral bodies is achieved. After being spread/pressed to a proper degree, the self-breaking screw plug 100 is tightened through the connection portion 630 until the clamping portion 110 and the first screw portion 120 are broken, thereby achieving a desired locking effect.
The universal pedicle screw fixing device provided by the invention has the advantages that on the basis of realizing universal angle imbedding, the ball head screw 500 and the connecting rod 200 are locked and fixed in a step-by-step mode, so that better pressurization/decompression effect in the operation is realized, the intervertebral height and the physiological curvature of the spine of a patient can be better recovered, and the patient can be healed and recovered more easily after the operation.
Through the design of the fixed twist-off force value of the self-breaking screw plug 100, the universal pedicle screw fixing device can be controlled to obtain an ideal locking force value under different operation conditions and different user conditions, and on the basis of meeting the locking fixation, the universal pedicle screw fixing device or the mounting tool is effectively prevented from being out of work and deforming due to improper operation.
Meanwhile, the mounting tool designed in a matched mode can effectively hold the clamping portion 110 of the stable self-breaking screw plug 100 through the arrangement of the connecting portion 630 and the clamping block 640, and the clamping portion 110 is prevented from falling into an operation area to hurt the nervous tissue of a patient after the final locking is broken.
Compared with the existing pedicle screw product, the universal pedicle screw fixing device provided by the invention can solve the problems that the traditional pedicle screw is poor in propping-open/pressurizing effect in the operation and unstable in final locking force value, has the advantages of flexible structure and simplicity and easiness in operation in the operation, can effectively shorten the operation time, reduces the operation difficulty of an operator, and is high in practicability.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (10)
1. A universal pedicle screw fixation device, comprising:
a ball screw (500) having a ball head (510);
the screw seat (400) is provided with a first screw hole (430), a second screw hole (440) and a first screw hole (450), the first screw hole (430), the second screw hole (440) and the first screw hole (450) are sequentially arranged along the length direction of the screw seat (400) and communicated, the inner peripheral surface of the first screw hole (450) is a spherical surface matched with the spherical head part (510), the screw seat (400) is provided with a U-shaped opening (410), the opening (410) extends from the first screw hole (430) to the second screw hole (440), and the two openings (410) are respectively positioned on the front side and the rear side of the screw seat (400);
a lock plug screw (300) connected to the second screw hole (440) and abutting against the ball head portion (510);
a connecting rod (200) clamped in the opening (410), wherein the length direction of the connecting rod (200) is perpendicular to the length direction of the screw seat (400);
and a self-breaking screw plug (100) which is connected to the first screw hole (430) and abuts against the connecting rod (200).
2. The universal pedicle screw fixation device according to claim 1, wherein the self-breaking screw plug (100) comprises a clamping portion (110) and a first threaded portion (120); joint portion (110) with first screw thread portion (120) integrated into one piece, from disconnected plug screw (100) be equipped with first recess (130) that are the V-arrangement, first recess (130) encircle the junction setting of joint portion (110) and first screw thread portion (120).
3. The universal pedicle screw fixation device according to claim 2, wherein the first threaded portion (120) is provided with a first inner corner hole (121), the clamping portion (110) is provided with a first through hole (113), and the first through hole (113) is opposite to and communicated with the first inner corner hole (121).
4. The universal pedicle screw fixation device according to claim 3, wherein the self-breaking screw plug (100) is provided with a V-shaped second groove (140), and the second groove (140) is arranged around the connection of the first through hole (113) and the first inner corner hole (121).
5. The universal pedicle screw fixation device according to any one of claims 2 to 4, wherein the clamping portion (110) is provided with a plurality of arc-shaped grooves (112), the arc-shaped grooves (112) are arranged around the outer peripheral surface of the clamping portion (110), and the arc-shaped grooves (112) extend downwards from the upper end surface of the clamping portion (110).
6. The universal pedicle screw fixation device as claimed in claim 1, wherein the locking screw plug (300) is provided with a second inner corner hole (310) and a second screw hole (320), the second inner corner hole (310) and the second screw hole (320) are sequentially arranged along the axial direction of the locking screw plug (300), and the inner peripheral surface of the second screw hole (320) is a spherical surface matched with the spherical head part (510).
7. The universal pedicle screw fixation device as claimed in claim 1, wherein the lower end surface of the screw base (400) is provided with a concave surface (420), the concave surface (420) is uniformly arranged around the first screw hole (450) at intervals, and the concave surface (420) is connected with the inner wall surface of the first screw hole (450).
8. The universal pedicle screw fixation device according to claim 7, wherein the concave surfaces (420) are provided in three.
9. The utility model provides an installation tool, characterized in that, includes portion of gripping (610), connecting rod portion (620), connecting portion (630) and fixture block (640), portion of gripping (610), connecting rod portion (620) and connecting portion (630) connect gradually, connecting portion (630) are equipped with card hole (631), card hole (631) can with according to any one of claims 1 to 8 universal pedicle screw fixing device's the auto-breaking plug screw (100) joint, the outer wall of connecting portion (630) is equipped with second through-hole (632), second through-hole (632) with card hole (631) intercommunication, the one end of fixture block (640) with connecting portion (630) are connected, the other end of fixture block (640) passes second through-hole (632) and can with auto-breaking plug screw (100) butt.
10. The mounting tool as claimed in claim 9, wherein the latching block (640) comprises a fixing portion (641) and an arc portion (642), the self-breaking screw plug (100) comprises a latching portion (110) and a first threaded portion (120), the fixing portion (641) is connected to the arc portion (642), the fixing portion (641) is connected to the connecting portion (630), the arc portion (642) extends from the fixing portion (641) to the second through hole (632), and a convex surface of the arc portion (642) is located in the latching hole (631) and can abut against the latching portion (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111086610.4A CN113768603A (en) | 2021-09-16 | 2021-09-16 | Universal pedicle screw fixing device and mounting tool thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111086610.4A CN113768603A (en) | 2021-09-16 | 2021-09-16 | Universal pedicle screw fixing device and mounting tool thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113768603A true CN113768603A (en) | 2021-12-10 |
Family
ID=78851515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111086610.4A Pending CN113768603A (en) | 2021-09-16 | 2021-09-16 | Universal pedicle screw fixing device and mounting tool thereof |
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| Country | Link |
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| CN (1) | CN113768603A (en) |
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Application publication date: 20211210 |