CN108703802B - Orthopedic internal fixation screw taking-out device - Google Patents
Orthopedic internal fixation screw taking-out device Download PDFInfo
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- CN108703802B CN108703802B CN201810620094.0A CN201810620094A CN108703802B CN 108703802 B CN108703802 B CN 108703802B CN 201810620094 A CN201810620094 A CN 201810620094A CN 108703802 B CN108703802 B CN 108703802B
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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
- A61B17/8665—Nuts
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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
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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
- A61B17/88—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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Abstract
The invention belongs to the technical field of orthopedic internal fixation, and particularly relates to an orthopedic internal fixation screw, a screw taking device and a method, wherein the screw comprises a threaded rod with threads and a nut connected with the end part of the threaded rod, and the nut comprises: the first nut and the second nut are respectively provided with the first pulling and twisting structure and the second pulling and twisting structure, so that when the screw is adopted for fastening, the second pulling and twisting structure is used as the integral pulling and twisting structure of the screw, the damage of the screwdriver to the pulling and twisting structure is left on the second pulling and twisting structure, when the screw is taken out, the second nut can be detached, the undamaged first pulling and twisting structure is used as the integral pulling and twisting structure of the screw, and meanwhile, the muscle and scab tissues are taken away by the detached second nut, so that the problem that the damaged pulling and twisting structure and the grown muscle scab tissues easily cause the situation of thread sliding is solved, and the one-time taking-out success rate of the internal fixation screw is improved.
Description
Technical Field
The invention belongs to the technical field of orthopedic internal fixation, and particularly relates to an orthopedic internal fixation screw extraction device.
Background
In the medical field, for fracture patients, an internal fixation technology is generally adopted, fracture parts are connected and fixed through a fixing plate and screws, and after the fracture parts are healed, the fixing plate and the screws are taken out through an operation; when the screw is taken out, the screw is screwed by the screwdriver when the screw is installed, the screwdriver inevitably causes certain damage to the screwing structure of the screw, so that the screwing structure of the screw is deformed to a certain degree, the screwing structure which is deformed when the screw is taken out is not firmly connected with the screwdriver, and the screwing structure is easily damaged completely, slides and cannot be taken out; meanwhile, the healing of the fracture can cause the soft tissue and callus around the screw to wrap the screw, so that the wrenching structure on the screw is filled and is easy to be separated when screwed by a screwdriver, such as patent application number: 201620398597.4A screw extractor for orthopedic operation, which realizes the screw extraction by arranging a chuck on the existing screwdriver to clamp a screw cap, but the clamping of the chuck is easy to fall off because the screw cap is small; the existing internal fixing screw for the sliding wire usually adopts a slipping extractor firstly, the slipping extractor is knocked by a bone hammer to enable the lower end of the slipping extractor to be embedded into a screw, then the screw is taken out in an anticlockwise rotating mode, secondary fracture caused by damage to an affected part is caused due to knocking, if the slipping extractor cannot take out the screw, an alloy drill bit is needed to damage a nut, after a fixing plate is taken down, a three-claw structure of a hand drill chuck is adopted to grab an exposed part of a screw rod, the screw is taken out in an anticlockwise rotating mode, metal scraps are generated in the process of damaging the nut, if protection measures are not good, the scraps can remain in a human body, if the hand drill cannot take out the screw, bone tissues around the screw rod need to be damaged by using a trepan, then the screw rod is taken out, and if the bolt is taken out once, the secondary taking-out method can, how to ensure the success of one-time taking out of the orthopedic internal fixation screw becomes a problem to be solved urgently.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides the orthopedic internal fixation screw, the extraction device and the use method in order to ensure the success probability of one-time extraction of the fixed internal fixation screw.
The technical scheme of the invention is as follows: the utility model provides an orthopedics internal fixation screw, the screw is including the nut of taking the screwed screw rod and screw rod end connection, and the nut lower extreme is provided with the arc chamfer, the screw includes: the screw cap comprises a first screw cap and a second screw cap, wherein a second screwing structure 21 is arranged on the second screw cap, a first screwing structure is arranged on the first screw cap, the first screwing structure and the second screwing structure 21 are both internal screwing structures, the projection of the second screwing structure 21 in the screw axis direction can completely fall into the projection of the first screwing structure in the screw axis direction, an interlayer is reserved between the first screwing structure and the second screwing structure 21 and is used for absorbing the damage of a screwdriver to the second screwing structure 21 when the screw is internally and fixedly installed, the first screw cap, the second screw cap, the first screwing structure and the second screwing structure 21 are all coaxially arranged with the screw, the first screw cap is fixedly connected with the screw rod, the second screw cap is arranged in the first screwing structure, a connecting section inserted into the first screwing structure is arranged at the lower end of the second screw cap, and a protruding section higher than the upper surface of the first screw cap is arranged at the upper end of the second screw cap, the protruding section is provided with an outer rim extending radially outwards, and the outer rim and the upper surface of the first nut cap together form a ring-shaped cap-starting groove 22.
Preferably, the first and second wrenching structures 21 have the same groove type.
Further, the first twisting structure and the second twisting structure 21 are all straight grooves, cross grooves, triangular grooves, square grooves, pentagonal grooves, internal hexagonal grooves or quincuncial grooves.
Preferably, the first and second wrenching structures 21 have different groove types.
Further, when the groove shape of the first wrenching structure is a cross groove, the groove shape of the second wrenching structure 21 is a straight groove; when the groove shape of the first wrenching structure is a triangular groove, the groove shape of the second wrenching structure 21 is a straight groove or a cross groove; when the groove shape of the first wrenching structure is a square groove, the groove shape of the second wrenching structure 21 is a straight groove, a cross groove or a triangular groove; when the groove shape of the first wrenching structure is a pentagonal groove, the groove shape of the second wrenching structure 21 is a straight groove, a cross groove, a triangular groove or a square groove; when the groove shape of the first wrenching structure is an inner hexagonal groove, the groove shape of the second wrenching structure 21 is a straight groove, a cross groove, a triangular groove, a square groove or a pentagonal groove; when the groove type of the first wrenching structure is a quincunx groove, the groove type of the second wrenching structure 21 is a Y-shaped groove.
Preferably, the connecting section and the first wrenching structure are in interference fit.
An orthopedic internal fixation screw extraction device comprising: the cap lifting groove 22 cleaning device and the cap lifting device, wherein the cap lifting groove 22 cleaning device comprises: the cleaning device comprises a cleaning device rod body, a cleaning device positioning head and a cleaning device shovel body, wherein the cleaning device positioning head is arranged at the lower end of the cleaning device rod body and is rotationally connected to the cleaning device rod body, the cleaning device positioning head is a screwing structure matched with the second screwing structure 21, the cleaning device positioning head is used for axially positioning the cleaning device shovel body, the cleaning device shovel body is arranged on the side surface of the cleaning device positioning head, and the cleaning device shovel body is connected with the cleaning device rod body;
the cap removing device comprises: the lifting device comprises a fixed cylinder 41, a fixed rod 42, a hook claw and a lifting rod 44, wherein the fixed rod 42 is arranged at the upper end of the fixed cylinder 41, the fixed rod 42 is horizontally arranged, the middle part of the fixed rod 42 is connected with the fixed cylinder 41, the fixed rod 42 is used as a support part for a palm part of a hand, an axial through groove is formed in the fixed cylinder 41, the lifting rod 44 is arranged in the through groove, the lifting rod 44 can slide up and down in the through groove, the lifting rod 44 is used as a lifting part for four fingers of the hand, and the fixed cylinder 41, the fixed rod 42 and the lifting rod 44 jointly form a lifting structure for realizing up-and-down lifting;
the lifting rod 44 is connected with the hook disc 43 through a vertical connecting rod, the hook disc 43 is arranged at the lower end of the fixed cylinder 41, the hook disc 43 can slide up and down in the fixed cylinder 41 under the driving of the lifting rod 44, a spring is arranged between the hook disc 43 and the fixed cylinder 41, the spring applies downward acting force to the hook disc 43 to enable the lifting structure to be kept in an open state, a plurality of hooks are symmetrically arranged on the lower end face of the hook disc 43, a grabbing structure capable of being embedded into the cap lifting groove 22 is arranged on each hook, the lower end face of the fixed cylinder 41 and the upper surface of the first nut are provided with an overlapping part, and the overlapping part serves as a supporting surface for the second nut to be taken out.
Preferably, the cleaning device shovel body is connected with the cleaning device rod body through a compression structure, and the compression structure comprises: a connecting rod used for connecting the cleaning device shovel body and the cleaning device rod body and an elastic element used for compressing the cleaning device shovel body.
Furthermore, the upper end of the connecting rod is hinged with the cleaning device rod body, the lower end of the connecting rod is fixedly connected with the cleaning device shovel body, and a spring or an elastic rope is arranged between the connecting rod and the cleaning device rod body.
Furthermore, the upper end of the connecting rod is fixedly connected with the cleaning device rod body, the lower end of the connecting rod is fixedly connected with the cleaning device shovel body, and the middle of the connecting rod is disconnected and connected through a spring.
Preferably, the lower end of the claw disk 43 is provided with a cap-up positioning head, and the cap-up positioning head is a screwing structure matched with the second screwing structure 21.
Preferably, the fixed cylinder 41 comprises a first fixed cylinder 41 and a second fixed cylinder 41, the first fixed cylinder 41 and the second fixed cylinder 41 are coaxially connected by screw threads, an axial through hole for accommodating the vertical link is arranged in the first fixed cylinder 41, the hook disc 43 is arranged in the second fixed cylinder 41, and a spring is arranged between the hook disc 43 and the first fixed cylinder 41.
An orthopedic internal fixation screw installation and removal method comprises the following steps:
step a: inserting the connecting section of the second nut into the first screwing structure of the first nut to connect the second nut with the first nut, and adopting the second screwing structure 21 as the screwing structure of the whole screw;
step b: screwing the screw by adopting a screwdriver matched with the second screwing structure 21 to complete internal fixation;
step c: when the screw is removed, the muscle or scab inside the second wrenching structure 21 is cleaned;
step d: screwing the second screwing structure 21 by a screwdriver, and taking out the screw;
step e: if the screw cannot be taken out in the step d, a cleaning device for the cap lifting groove 22 is adopted to clean the cap lifting groove 22, a positioning head of the cleaning device is inserted into the second wrenching structure 21 to be positioned, a shovel body of the cleaning device is embedded into the cap lifting groove 22, a rod body of the cleaning device is rotated, and the cap lifting groove 22 is cleaned through the shovel body of the cleaning device;
step f: taking out the second nut through the nut lifting device, inserting a positioning head of the nut lifting device into the second screwing structure 21 for positioning, embedding a hook claw at the lower end of a hook claw disc 43 into a nut lifting groove 22, pinching the fixing rod 42 and the lifting rod 44 through a hand part, enabling the lifting rod 44 to drive the hook claw disc 43 to ascend, enabling the fixing cylinder 41 to move downwards at the same time, enabling the lower end face of the fixing cylinder 41 to be in contact with the first nut for supporting, and continuing pinching the fixing rod 42 and the lifting rod 44 until the second nut is taken out;
step g: the screw is taken out by a screwdriver matched with the first wrenching structure.
Furthermore, in the step a, when the first nut cap and the second nut cap are connected, the second nut cap is pressed by hand, and is connected with the first screwing structure of the first nut cap through the interference fit of the connecting section of the second nut cap.
Further, the cleaning position of the cleaning device shovel body in the step e further comprises the outer side of the second nut bulge section.
Furthermore, in the step e, the pulling and twisting structure, the end part of the positioning head of the cleaning device of which is matched with the second pulling and twisting structure 21, is embedded into the second pulling and twisting structure 21 to realize the positioning of the horizontal position, and the positioning of the vertical direction is realized through the axial length of the positioning head of the cleaning device.
Further, in the step g, the auxiliary claws on the auxiliary ring are embedded into the horizontal grooves 12 and the vertical grooves 13 on the first screw cap, so that the connection strength between the screwdriver and the first wrenching structure is increased.
The invention has the beneficial effects that:
1) the screw comprises a screw rod with threads and a nut connected with the end part of the screw rod, wherein the lower end of the nut is provided with an arc-shaped chamfer, and the nut comprises: the first nut and the second nut are respectively provided with the first pulling and screwing structure and the second pulling and screwing structure 21, so that when the screw is used for fastening, the second pulling and screwing structure 21 serves as the whole pulling and screwing structure of the screw, the damage of the screwdriver to the pulling and screwing structure is left on the second pulling and screwing structure 21, when the screw is taken out, the second nut can be detached, the undamaged first pulling and screwing structure serves as the whole pulling and screwing structure of the screw, meanwhile, the muscle and scab tissues are taken away by the detached second nut, the problem that the damaged pulling and screwing structure and the grown muscle scab tissues easily cause the situation of thread slipping is solved, and the one-time taking-out success rate of the internal fixation screw is improved.
2) In the invention, a first nut cap is fixedly connected with a screw rod, a second nut cap is arranged in a first screwing structure, the lower end of the second nut cap is provided with a connecting section inserted into the first screwing structure, the upper end of the second nut cap is provided with a convex section higher than the upper surface of the first nut cap, the convex section is provided with an outer edge extending outwards along the radial direction, the outer edge and the upper surface of the first nut cap form a ring-shaped cap-starting groove 22 together, with the structure, the second nut can be connected with the first screwing structure of the first nut through the connecting section, at the same time, a cap-raising groove 22 is provided for removing the second nut, by arranging the second nut in the wrenching structure of the first nut, filling the wrenching structure in the muscle and scab-avoiding organiser, meanwhile, the distance between the first screwing structure and the second screwing structure 21 in the axis direction of the screw is reduced, and the sliding thread between the first screwing structure and the second screw cap is avoided.
Drawings
FIG. 1 is a schematic view of an overall structure of an orthopedic internal fixation screw;
FIG. 2 is a front view of an orthopedic internal fixation screw;
FIG. 3 is a top view of an orthopedic internal fixation screw;
FIG. 4 is a structural diagram of an orthopedic internal fixation screw with the same groove shape;
FIG. 5 is a schematic view of an orthopedic internal fixation screw with a damaged second wrenching structure;
FIG. 6 is a schematic structural diagram of an orthopedic internal fixation screw in a fifth embodiment;
FIG. 7 is a schematic structural diagram of an orthopedic internal fixation screw in a sixth embodiment;
FIG. 8 is a schematic structural diagram of a seventh embodiment of an orthopedic internal fixation screw;
FIG. 9 is a schematic structural diagram of a cap-removing groove device of an orthopedic internal fixation screw removing device;
FIG. 10 is a schematic structural view of a cap removing device of an orthopedic internal fixation screw removing device;
FIG. 11 is a schematic view of a first attachment for the blade of the cleaning apparatus of FIG. 9;
FIG. 12 is a schematic view of a second attachment for the blade of the cleaning apparatus of FIG. 9;
FIG. 13 is a schematic view of a first jaw disc configuration of the decapping device of FIG. 10;
FIG. 14 is a schematic cross-sectional view A-A of FIG. 13;
FIG. 15 is a schematic view of the open configuration of the finger plate of FIG. 13;
FIG. 16 is a schematic view of a second finger plate configuration of the decapping device of FIG. 10;
FIG. 17 is a schematic view of the open configuration of the finger plate of FIG. 16;
FIG. 18 is a schematic view of the nail pulling device of the orthopedic internal fixation screw extraction device;
in the figure: 1-a first nut; 2-a second nut; 3-a cap lifting groove cleaning device; 4-a cap-lifting device; 5-a nail nipping device; 11-a first wrenching structure; 12-horizontal groove 12; 13-vertical slots; 14-a second nut securing slot; 21-a second wrenching structure; 22-a capping groove; 23-a stopper; 24-a second nut-retaining arm; 25-a third nut; 31-cleaning the device rod body; 32-cleaning device positioning head; 33-cleaning device shovel body; 41-a fixed cylinder; 42-a fixation rod; 43-hook plate; 44-a lifting bar; 51-a nail pulling rod body; 52-an auxiliary ring; 211-a damaged second wrenching structure; 411-a first stationary cartridge; 412-a second stationary cylinder; 431-a pressing disc; 432-a fixation groove; 433-a steel wire rope; 521-auxiliary jaw.
Detailed Description
The invention will be described in detail below with reference to the following drawings:
detailed description of the invention
Referring to fig. 1 to 3, the orthopedic internal fixation screw disclosed in the present embodiment includes a screw rod with threads and a nut connected to an end of the screw rod, wherein an arc-shaped chamfer is provided at a lower end of the nut to generate an acting force to a fixing plate along a bone axis direction toward a fracture when the screw contacts an inclined surface on the fixing plate, and the screw includes: the first nut 1 and the second nut 2 are respectively provided with a first pulling structure 11 and a second pulling structure 21, the first pulling structure 11 and the second pulling structure 21 are both inner pulling structures, the projection of the second pulling structure 21 in the screw axis direction can completely fall into the projection of the first pulling structure 11 in the screw axis direction, an interlayer is left between the first pulling structure 11 and the second pulling structure 21 and is used for absorbing the damage of a screwdriver to the second pulling structure 21 when the screw is fixedly installed in the screw, the second pulling structure 21 is smaller than the first pulling structure 11, the first pulling structure 11 can completely cover the second pulling structure 21, so that an interlayer is left between the two pulling structures, and the first nut 1, the second nut 2, the first pulling structure 11 and the second pulling structure 21 are all arranged coaxially with the screw, the first nut cap 1 is fixedly connected with the screw, the second nut cap 2 is arranged in the first pulling and twisting structure 11, the lower end of the second nut cap 2 is provided with a connecting section inserted into the first pulling and twisting structure 11, the upper end of the second nut cap 2 is provided with a protruding section higher than the upper surface of the first nut cap 1, the protruding section is provided with an outer edge extending outwards along the radial direction, and the outer edge and the upper surface of the first nut cap 1 form an annular cap starting groove 22 together.
When the screw is used for internal fixation, the second pulling structure 21 is used as the integral pulling structure of the screw, when the screw is screwed by the screwdriver, the damage of the screwdriver to the screw is absorbed by an interlayer between the first pulling structure 11 and the second pulling structure 21, so that the damage of the first pulling structure 11 is avoided, the second screw cap 2 is arranged in the first pulling structure 11, the first pulling structure 11 is filled, the protection effect on the first pulling structure 11 is achieved, on one hand, the damage of a screw bolt and a knife is avoided, and on the other hand, the taking-out of the screw is prevented from being influenced by the entering of healed and grown muscles and scabs;
when the screw is taken out, the following two modes are provided
Firstly, the second screwing structure 21 is used as the screwing structure of the whole screw, if the second screwing structure 21 fails, the second screw cap 2 is removed through the cap opening groove 22, at the moment, the first screwing structure 11 is used as the screwing structure of the whole screw, the screw is taken out through a screwdriver, and the first screwing structure 11 is not damaged, and meanwhile, no muscle or scab tissue exists inside the screw, so that the success rate of taking the screw at one time is improved;
or when the screw is taken out, the second screw cap 2 is firstly removed through the cap lifting groove 22, the second screwing structure 21 is taken as the screwing structure of the whole screw for removal, the second screwing structure 21 is damaged during installation, inevitable cleaning in the second screwing structure 21 is incomplete during removal, the probability of thread slipping is increased, the first screwing structure 11 is damaged if the second screwing structure is damaged seriously, the second screw cap 2 is firstly removed during taking out the screw, the first screwing structure 11 is prevented from being damaged, and the success rate of taking the screw at one time is ensured.
Detailed description of the invention
Referring to fig. 4, in this embodiment, on the basis of the first embodiment, specifically, the groove shapes of the first screwing structure 11 and the second screwing structure 21 are the same.
The first twisting structure 11 and the second twisting structure 21 are all straight grooves, cross grooves, triangular grooves, square grooves, pentagonal grooves, internal hexagonal grooves or quincuncial grooves.
During screwing, force is transmitted to the second screwing structure 21 through the end part of the screwdriver and then transmitted to the first screwing structure 11 through the interlayer, the first screwing structure 11 and the second screwing structure 21 adopt the same groove shape to meet the force transmission, and the interlayer with the same thickness is formed to absorb the damage of the screwdriver on the first screwing structure 11;
detailed description of the invention
Referring to fig. 5, in this embodiment, on the basis of the first embodiment, specifically, the groove shapes of the first screwing structure 11 and the second screwing structure 21 are different.
When the groove shape of the first wrenching structure 11 is a cross groove, the groove shape of the second wrenching structure 21 is a straight groove; when the groove shape of the first wrenching structure 11 is a triangular groove, the groove shape of the second wrenching structure 21 is a straight groove or a cross groove; when the groove shape of the first wrenching structure 11 is a square groove, the groove shape of the second wrenching structure 21 is a straight groove, a cross groove or a triangular groove; when the groove shape of the first wrenching structure 11 is a pentagonal groove, the groove shape of the second wrenching structure 21 is a straight groove, a cross groove, a triangular groove or a square groove; when the groove shape of the first wrenching structure 11 is an inner hexagonal groove, the groove shape of the second wrenching structure 21 is a straight groove, a cross groove, a triangular groove, a square groove or a pentagonal groove; when the groove type of the first wrenching structure 11 is a quincunx groove, the groove type of the second wrenching structure 21 is a Y-shaped groove.
When the groove types of the first wrenching structure 11 and the second wrenching structure 21 are different, the number of the corners of the first wrenching structure 11 is larger than that of the second wrenching structure 21, so that the groove type rotation track of the second wrenching structure 21 is ensured to completely fall into the first wrenching structure 11, and as the number of the corners of the first wrenching structure 11 is larger than that of the second wrenching structure 21, the interlayer forms areas with different thicknesses, and the thicker part forms a rib plate structure, so that the strength of the interlayer is enhanced on the premise of not influencing stress transmission, and meanwhile, the track of the second wrenching structure 21 rotating at a symmetrical center completely falls into the first wrenching structure 11, so that the interlayer can completely absorb damage when the second wrenching structure 21 slides, the damaged second wrenching structure 211 cannot damage the first wrenching structure 11, and the success probability of nail taking is further improved;
detailed description of the invention
In this embodiment, on the basis of the first embodiment, specifically, an interference fit is adopted between the connecting section and the first wrenching structure 11.
A detachable connection mode of a first nut 1 and a second nut 2 is provided;
detailed description of the invention
Referring to fig. 6, in this embodiment, on the basis of the first embodiment, specifically, a plurality of horizontal grooves 12 are disposed on the upper surface of the first nut 1, the horizontal grooves 12 are radially arranged with the axis of the first nut 1 as a center of circle, the horizontal grooves 12 communicate the first wrenching structure 11 with the outer edge of the first nut 1, a vertical groove 13 is disposed at a connection between the outer edge of the first nut 1 and the horizontal groove 12, a stopper 23 is disposed in the vertical groove 13 to fill the vertical groove 13, the outer side wall profile of the stopper 23 matches the outer edge profile of the first nut 1, the upper end of the stopper 23 is connected to the second nut 2 through a connecting rod, and the connecting rod is disposed in the horizontal groove 12;
through the arrangement of the horizontal groove 12 and the vertical groove 13, when the screw is taken out, the screw taking device can be adopted to be embedded into the groove for screwing, as the acting point of the vertical groove 13 is far away from the axial line of the screw compared with the first screwing structure 11, a larger force arm can be provided, the probability of taking out the screw is improved, meanwhile, the horizontal groove 12 and the vertical groove 13 are filled up through the stop block and the connecting rod, the muscle and scab tissues are prevented from entering, meanwhile, the stop block and the connecting rod are embedded into the horizontal groove 12 and the vertical groove 13, the connecting strength of the first screw cap 1 and the second screw cap 2 is increased, and the second screw cap 2 is fixed;
detailed description of the invention
Referring to fig. 7, this embodiment is based on the first embodiment, specifically, an annular second nut fixing groove 14 is disposed on a side surface of the first nut 1, a plurality of second nut fixing arms 24 are disposed on a protruding section of the first nut 1, the plurality of second nut fixing arms 23 are radially distributed with an axis of the second nut 2 as a center, and the second nut fixing arms 24 include: the nut fixing device comprises a horizontal section, a vertical section and a fixing section, wherein the horizontal section is positioned on the upper surface of a first nut 1, the vertical section is tightly attached to the side wall of the first nut 1, the fixing section is embedded into a fixing groove of a second nut 2, and a nut lifting section which is not in contact with the upper surface of the first nut 1 is arranged on the horizontal section;
the second screw cap 2 and the first screw cap 1 are fixed through the plurality of second screw cap fixing arms 24, and the first screw cap 1 and the second screw cap 2 are not subjected to large acting force in the axis direction in use, so that the second screw cap fixing arms 24 are used for more conveniently fixing, an additional fixing mode is not needed between the connecting section of the second screw cap 2 and the first screw cap 1, the second screw cap 2 is convenient to disassemble, and meanwhile, a cap lifting section is arranged on the second screw cap fixing arms 24, so that the second screw cap 2 is convenient to disassemble;
detailed description of the invention
With reference to fig. 8, this embodiment is based on the first embodiment, and specifically, the orthopedic internal fixation screw further includes a third nut 25, the upper half section of the outer side wall of the first nut 1 is provided with a thread, the third nut 25 includes a horizontal upper cover body and a side cover body extending downward from the edge of the upper cover body, the upper cover body and the side cover body together form a closed cover body structure, the inner wall of the side cover body is provided with a thread connected with the first nut 1, and the third nut 25 is provided with an external screwing structure;
when the screw is installed, the second screwing structure 21 is used as the screwing structure of the whole screw to be screwed, after the installation is finished, the third screw cap 25 is installed on the first screw cap 1 through the external screwing structure, and the second screw cap 2 is shielded through the third screw cap, so that grown muscles or scab tissues are prevented from entering the second screwing structure 21;
when taking out the screw, the third nut 25 is firstly removed through the external screwing structure, then the second nut 2 is removed, and the screw is taken out through the first screwing structure 11, or the screw is taken out directly by using the second screwing structure 21;
detailed description of the invention
The device for removing the orthopedic internal fixation screw disclosed by the embodiment is realized on the orthopedic internal fixation screw according to the first, second, third, fourth, fifth, sixth or seventh embodiment, and comprises: a capping machine 3 and a capping machine 4, as shown in fig. 9, the capping machine 3 including: the cleaning device comprises a cleaning device rod body 31, a cleaning device positioning head 32 and a cleaning device shovel body 33, wherein the cleaning device positioning head 32 is arranged at the lower end of the cleaning device rod body 31, the cleaning device positioning head 32 is rotatably connected to the cleaning device rod body 31, the cleaning device positioning head 32 is inserted into the cleaning device rod body through the rod body to realize rotary connection and is fixed through a magnet, the cleaning device positioning head 32 is a screwing structure matched with the second screwing structure 21, the cleaning device positioning head 32 is used for axially positioning the cleaning device shovel body 33, the cleaning device shovel body 33 is arranged on the side surface of the cleaning device positioning head 32, and the cleaning device shovel body 33 is connected with the cleaning device rod body 31; the cleaning device shovel body 33 is embedded into the cap lifting groove 22, and the cap lifting groove 22 is cleaned by rotating the cleaning device shovel body 33, so that the second screw cap 2 can be conveniently taken out through the cap lifting groove 22;
as shown in fig. 10, the cap remover 4 includes: the lifting device comprises a fixed cylinder 41, a fixed rod 42, a claw disc 43 and a lifting rod 44, wherein the fixed rod 42 is arranged at the upper end of the fixed cylinder 41, the fixed rod 42 is horizontally arranged, the middle part of the fixed rod 42 is connected with the fixed cylinder 41, the fixed rod 42 is used as a support part for a palm part of a hand, an axial through groove is formed in the fixed cylinder 41, the lifting rod 44 is arranged in the through groove, the lifting rod 44 can slide up and down in the through groove, the lifting rod 44 is used as a lifting part for four fingers of the hand, and the fixed cylinder 41, the fixed rod 42 and the lifting rod 44 jointly form a lifting structure for realizing up-and-down lifting through;
the lifting rod 44 is connected with the hook disc 43 through a vertical connecting rod, the hook disc 43 is arranged at the lower end of the fixed cylinder 41, the hook disc 43 can slide up and down in the fixed cylinder 41 under the driving of the lifting rod 44, a spring is arranged between the hook disc 43 and the fixed cylinder 41, the spring applies downward acting force to the hook disc 43 to enable the lifting structure to be kept in an open state, a plurality of hooks are symmetrically arranged on the lower end face of the hook disc 43, a grabbing structure capable of being embedded into the cap lifting groove 22 is arranged on each hook, the lower end face of the fixed cylinder 41 and the upper surface of the first nut 1 are provided with an overlapping part, and the overlapping part serves as a supporting surface for the second nut 2 to be taken out.
The symmetrical claws of the claw disk 43 can be embedded into the cap opening groove 22, when the second nut 2 is lifted upwards, the nut is stressed at multiple points uniformly, the problem that the cap opening groove 22 is damaged and cannot be taken out due to single-point prying of the cap opening groove 22 by other tools is avoided, meanwhile, the lower end surface of the fixed cylinder 41 and the upper surface of the first nut 1 are provided with overlapped parts which are used as supporting surfaces for taking out the second nut 2, the reaction force generated when the claw disk 43 lifts the second nut 2 upwards is acted on the upper surface of the first nut 1 through the lower end surface of the fixed cylinder 41, one of the advantages of the arrangement is that the lifting process is more stable, the contact surface at the lower end of the fixed cylinder 41 plays a role in positioning while providing the reaction force, the upward lifting force of the claw disk 43 is kept parallel to the axis of the screw all the time, and the other advantage is that the lifting force to the second nut 2 and the reaction force of the fixed cylinder 41 disappear at the same time when the second nut 2 is taken out, this is more stable when the second nut 2 is removed;
detailed description of the invention
This embodiment is on the basis of embodiment eight, specifically, the cleaning device shovel body passes through compact structure and is connected with the cleaning device body of rod, compact structure includes: a connecting rod used for connecting the cleaning device shovel body and the cleaning device rod body and an elastic element used for compressing the cleaning device shovel body. The cleaning device shovel body is stuck in the cap lifting groove 22 through the compression structure, so that the cleaning is more thorough, and meanwhile, when the cleaning device shovel body is embedded in the cap lifting groove 22, the radial distance between the cleaning device shovel body and the cleaning device rod body can be changed through the compression structure, so that the cleaning device shovel body can be conveniently embedded in the cap lifting groove 22, and meanwhile, the cap lifting groove 22 with different sizes can be adapted;
as shown in fig. 11, specifically, the upper end of the connecting rod is hinged to the cleaning device rod, the lower end of the connecting rod is fixedly connected to the cleaning device shovel, and a spring or an elastic rope is disposed between the connecting rod and the cleaning device rod.
Referring to fig. 12, specifically, the upper end of the connecting rod is fixedly connected to the cleaning device rod body, the lower end of the connecting rod is fixedly connected to the cleaning device shovel body, and the middle of the connecting rod is disconnected and connected through a spring.
Detailed description of the preferred embodiment
In this embodiment, on the basis of the eighth specific embodiment, specifically, a cap-removing positioning head is arranged at the lower end of the hook claw disk 43, and the cap-removing positioning head is a screwing structure matched with the second screwing structure 21.
The upper end of the cap-lifting positioning head is embedded into a cylindrical groove on the claw disc 43 and is connected through a magnet to form rotary connection, the axial position of the cap-lifting positioning head positioning claw corresponds to the cap-lifting groove 22, and the claw disc 43 is coaxial with the axis of the screw through the cap-lifting groove 22 positioning device;
detailed description of the invention
Referring to fig. 10, on the basis of the eighth embodiment, specifically, the fixed cylinder 41 includes a first fixed cylinder 411 and a second fixed cylinder 412, the first fixed cylinder 411 and the second fixed cylinder 412 are coaxially screwed, an axial through hole for accommodating the vertical link is provided in the first fixed cylinder 411, the hook plate 43 is provided in the second fixed cylinder 412, and a spring is provided between the hook plate 43 and the first fixed cylinder 411.
When the installation is in a maintenance mode, the second fixed cylinder 41 is detached from the first fixed cylinder 41, so that the installation and maintenance are facilitated;
detailed description of the invention
The embodiment is based on the eighth embodiment, and specifically, two ways for the hook to grab the cap groove 22 are provided;
as shown in fig. 13-15, a pressing disc 431 is further disposed above the hook disc 43, the pressing disc 431 is sleeved on the vertical connecting rod, a spring is disposed between the pressing disc 431 and the fixed cylinder 41, the pressing disc 431 and the hook disc 43 clamp an upper half section of the hook, meanwhile, a side surface of the hook disc 43 and an inner wall of the fixed cylinder 41 clamp a lower half section of the hook, an included angle between the upper half section of the hook and the lower half section of the hook is greater than 90 °, the lower half section of the hook is provided with a small hook, and an outwardly expanded bell mouth is disposed on an inner wall of a lower end of the fixed cylinder 41;
under the action of the spring, the claw disc 43 moves downwards, the pressing disc 431 and the claw disc 43 press the upper half section of the claw tightly to enable the claw to rotate, at the moment, the outer side of the lower half section of the claw is contacted with the inner wall of the bell mouth, the inner wall of the bell mouth limits the claw to enable the claw to be opened, after the claw disc 43 is contacted with the second screw cap 2, the fixed cylinder 41 moves downwards to extrude the claw inwards from the outer side of the lower half section of the claw to enable the claw to rotate, and meanwhile, a small hook below the claw is embedded into the cap groove 22 to clamp the second screw cap 2;
as shown in fig. 16 and 17, two inclined fixing grooves 432 are formed in the hook plate 43, each fixing groove 432 is provided with an annular closed steel wire rope 433, the two steel wire ropes 433 are arranged in a crossing manner under the guidance of the fixing groove 432, the distance between the lower ends of the two steel wire ropes 433 is smaller than the diameter of the upper surface of the second nut 2 under the guidance of the fixing groove 432, a gap is left between the lower ends of the two steel wire ropes 433 and the hook plate 43, and the lower ends of the closed steel wire ropes 433 can be hung in the cap lifting groove 22 to form a hook grabbing structure;
detailed description of the invention
With reference to fig. 18, on the basis of the eighth specific embodiment, in the present embodiment, specifically, the device for removing internal fixation screws in orthopedics further includes a nail pulling device 5, where the nail pulling device 5 includes a nail pulling rod body 51, a pulling structure matched with the first pulling structure 11 is disposed at a lower end of the nail pulling rod body 51, an auxiliary ring 52 is further disposed on the nail pulling rod body 51, the auxiliary ring 52 is sleeved on the nail pulling rod body 51, a spring is disposed between the auxiliary ring 52 and the nail pulling rod body 51, and a plurality of auxiliary claws 521 clamped with the horizontal groove 12 and the vertical groove 13 of the first nut 1 are disposed on a lower end surface of the auxiliary ring 52;
after the second nut 2 is taken out, the auxiliary claw 521 on the auxiliary ring 52 is embedded into the horizontal groove 12 and the vertical groove 13 on the first nut 1 through the matching of the pulling and screwing structure at the lower end of the nail pulling rod body 51 and the first pulling and screwing structure 11 under the action of the spring, and as the acting point of the vertical groove 13 is farther than the distance between the first pulling and screwing structure 11 and the screw axis, a larger force arm can be provided, and the probability of taking out the screw is improved;
detailed description of the invention fourteen
The present embodiment discloses a method for using an orthopedic internal fixation screw, which is implemented on an orthopedic internal fixation screw according to a first embodiment, a second embodiment, a third embodiment, a fourth embodiment, a fifth embodiment, a sixth embodiment or a seventh embodiment and an orthopedic internal fixation screw extraction device according to an eighth embodiment, a ninth embodiment, a tenth embodiment, an eleventh embodiment, a twelfth embodiment or a thirteenth embodiment, and includes the following steps:
step a: inserting the connecting section of the second nut 2 into the first screwing structure 11 of the first nut 1, so that the second nut 2 is connected with the first nut 1, and adopting a second screwing structure 21 as a screwing structure of the whole screw;
step b: screwing the screw by adopting a screwdriver matched with the second screwing structure 21 to complete internal fixation;
step c: when the screw is removed, the muscle or scab inside the second wrenching structure 21 is cleaned;
step d: screwing the second screwing structure 21 by a screwdriver, and taking out the screw;
step e: if the screw cannot be taken out in the step d, a cleaning device for the cap lifting groove 22 is adopted to clean the cap lifting groove 22, a positioning head of the cleaning device is inserted into the second wrenching structure 21 to be positioned, a shovel body of the cleaning device is embedded into the cap lifting groove 22, a rod body of the cleaning device is rotated, and the cap lifting groove 22 is cleaned through the shovel body of the cleaning device;
step f: taking out the second nut 2 through the nut lifting device, inserting a positioning head of the nut lifting device into the second screwing structure 21 for positioning, embedding the hooks at the lower end of the hook disc 43 into the nut lifting groove 22, pinching the fixing rod 42 and the lifting rod 44 through the hand part, enabling the lifting rod 44 to drive the hook disc 43 to ascend, enabling the fixing cylinder 41 to move downwards at the same time, enabling the lower end face of the fixing cylinder 41 to be in contact with the first nut 1 for supporting, and continuing pinching the fixing rod 42 and the lifting rod 44 until the second nut 2 is taken out;
step g: the screw is removed by means of a screwdriver which is adapted to the first wrenching structure 11.
Detailed description of the invention
In this embodiment, on the basis of the fourteenth specific implementation manner, specifically, in the step a, when the first nut 1 and the second nut 2 are connected, the second nut 2 is pressed by a hand, and the connection section of the second nut 2 is connected with the first screwing structure 11 of the first nut 1 through interference fit.
Detailed description of the invention
In this embodiment, on the basis of the fourteenth specific implementation manner, specifically, the cleaning position of the cleaning device shovel in the step e further includes an outer side of the protruding section of the second nut 2. The cap starting groove 22 and the side wall of the second screw cap 2 are cleaned.
Detailed description of the invention seventeen
On the basis of the fourteenth specific implementation manner, in the step e, specifically, the pulling and twisting structure, of which the end portion is matched with the second pulling and twisting structure 21, of the positioning head of the cleaning device is embedded in the second pulling and twisting structure 21 to realize the positioning in the horizontal position, and the positioning in the vertical direction is realized through the axial length of the positioning head of the cleaning device. Thereby ensuring the relative position of the shovel body and the cap opening groove 22 of the cleaning device and facilitating the cleaning of the cap opening groove 22.
Description of the preferred embodiment eighteen
In this embodiment, on the basis of the fourteenth specific embodiment, specifically, in step g, the screw is taken out by the nail pulling device, and the auxiliary claw on the auxiliary ring of the nail pulling device is inserted into the horizontal groove 12 and the vertical groove 13 on the first nut 1 to increase the connection strength between the screwdriver and the first screwing structure 11.
Detailed description of the invention nineteen
Based on the fourteenth specific implementation manner, specifically, in the step f, the screwing structure at the end of the cap lifting device positioning head matched with the second screwing structure 21 is embedded in the second screwing structure 21 to realize the positioning of the horizontal position, the positioning of the vertical direction is realized through the axial length of the cap lifting device positioning head, the hook claw is inserted from the notch at the edge of the second nut 2, the hook claw disk 43 is rotated, the cap lifting device positioning head is rotatably connected with the hook claw disk 43, the grabbing structure on the hook claw is embedded in the cap lifting groove 22, and meanwhile, the cap lifting device positioning head is positioned.
The cap starting groove 22 is provided with a notch, so that the hook can enter the cap starting groove 22 from the notch, and the connection structure of the hook and the second screw cap 2 is simplified.
Detailed description of the invention twenty
In this embodiment, based on the fourteenth specific implementation manner, specifically, in the step f, the screwing structure whose end portion of the cap lifting device positioning head is matched with the second screwing structure 21 is embedded in the second screwing structure 21 to achieve positioning in a horizontal position, positioning in a vertical direction is achieved by the axial length of the cap lifting device positioning head, by arranging two rotatable hooks on the hook plate 43, under the action of a spring, the hook plate 43 moves downward, the pressing plate 431 and the hook plate 43 press the upper half section of the hook to rotate the hook, at this time, the outer side of the lower half section of the hook contacts with the inner wall of the bell mouth, the inner wall of the bell mouth limits the hook to open the hook, after the hook plate 43 contacts with the second nut 2, the fixing cylinder 41 moves downward, the hook is pressed inward from the outer side of the lower half section of the hook to rotate the hook, and simultaneously, the small hook below the hook is embedded in the cap lifting groove 22, clamping the second nut 2;
detailed description twenty-one
On the basis of the fourteenth specific implementation manner, specifically, in the step f, the second pulling structure 21 is embedded in the cap lifting device through the pulling and twisting structure of which the end portion of the positioning head of the cap lifting device is matched with the second pulling and twisting structure 21 to achieve horizontal positioning, the positioning in the vertical direction is achieved through the axial length of the positioning head of the cap lifting device, two annular steel wire ropes which are arranged in a crossed manner are used as claws, and the positions of the steel wire ropes are fixed through fixing grooves on a claw disc 43, so that the distance between the lower ends of the two steel wire ropes is smaller than the diameter of the upper surface of the second nut 2, and when the claw disc 43 is pressed against the second nut 2, the lower ends of the two steel wire ropes slide towards the outer side of the second nut 2 until the lower ends of the two steel wire ropes fall into the cap lifting groove 22, so.
The above embodiments are merely illustrative of the present patent and do not limit the scope of the patent, and those skilled in the art can make modifications to the parts thereof without departing from the spirit and scope of the patent.
Claims (6)
1. An orthopedic internal fixation screw extraction device, comprising: play cap groove cleaning device (3) and play cap device (4), play cap groove cleaning device (3) includes: the cleaning device comprises a cleaning device rod body (31), a cleaning device positioning head (32) and a cleaning device shovel body (33), wherein the cleaning device positioning head (32) is arranged at the lower end of the cleaning device rod body (31), the cleaning device positioning head (32) is rotatably connected to the cleaning device rod body (31), the cleaning device positioning head (32) is a screwing structure matched with the second screwing structure (21), the cleaning device positioning head (32) axially positions the cleaning device shovel body (33), the cleaning device shovel body (33) is arranged on the side face of the cleaning device positioning head (32), and the cleaning device shovel body (33) is connected with the cleaning device rod body (31);
the cap-removing device (4) comprises: the lifting mechanism comprises a fixed cylinder (41), a fixed rod (42), a claw disc (43) and a lifting rod (44), wherein the fixed rod (42) is arranged at the upper end of the fixed cylinder (41), the fixed rod (42) is horizontally arranged, the middle part of the fixed rod (42) is connected with the fixed cylinder (41), the fixed rod (42) is used as a support part of a palm part of a hand, an axial through groove is formed in the fixed cylinder (41), the lifting rod (44) is arranged in the through groove, the lifting rod (44) can slide up and down in the through groove, the lifting rod (44) is used as a lifting piece of four fingers of the hand, and the fixed cylinder (41), the fixed rod (42) and the lifting rod (44) jointly form a lifting structure which can realize up-down lifting through hand pinching;
the lifting rod (44) is connected with a claw disc (43) through a vertical connecting rod, the claw disc (43) is arranged at the lower end of the fixed cylinder (41), the claw disc (43) can slide up and down in the fixed cylinder (41) under the driving of the lifting rod (44), a spring is arranged between the claw disc (43) and the fixed cylinder (41), the spring applies downward acting force to the claw disc (43) to enable the lifting structure to be kept in an open state, a plurality of claws are symmetrically arranged on the lower end surface of the claw disc (43), a grabbing structure capable of being embedded into a cap lifting groove (22) is arranged on each claw, an overlapping part is arranged between the lower end surface of the fixed cylinder (41) and the upper surface of the first nut (1), and the overlapping part serves as a supporting surface for taking out the second nut (2);
the screw comprises a first screw cap (1) and a second screw cap (2), a second wrenching structure (21) is arranged on the second screw cap, a protruding section higher than the upper surface of the first screw cap (1) is arranged at the upper end of the second screw cap (2), an outer edge extending outwards in the radial direction is arranged on the protruding section, and the outer edge and the upper surface of the first screw cap (1) form an annular cap opening groove (22) together.
2. The orthopedic internal fixation screw extraction device as claimed in claim 1, wherein the clearing device blade (33) is connected to the clearing device shaft (31) by a compression structure, the compression structure comprising: a connecting rod used for connecting the cleaning device shovel body (33) and the cleaning device rod body (31) and an elastic element used for pressing the cleaning device shovel body (33).
3. The orthopedic internal fixation screw extraction device according to claim 2, wherein the upper end of the connecting rod is hinged to the cleaning device rod body (31), the lower end of the connecting rod is fixedly connected to the cleaning device shovel body (33), and a spring or an elastic rope is arranged between the connecting rod and the cleaning device rod body (31).
4. The orthopedic internal fixation screw extraction device according to claim 2, characterized in that the upper end of the connecting rod is fixedly connected with the cleaning device rod body (31), the lower end of the connecting rod is fixedly connected with the cleaning device shovel body (33), and the middle of the connecting rod is disconnected and connected through a spring.
5. The orthopedic internal fixation screw extraction device according to claim 1, characterized in that the lower end of the hook claw disk (43) is provided with a cap-removing positioning head, and the cap-removing positioning head is a screwing structure matched with the second screwing structure (21).
6. The orthopedic internal fixation screw extraction device according to claim 1, characterized in that the fixing cylinder (41) comprises a first fixing cylinder (411) and a second fixing cylinder (412), the first fixing cylinder (411) and the second fixing cylinder (412) are coaxially screwed, an axial through hole for accommodating the vertical link is arranged in the first fixing cylinder (411), the hook disk (43) is arranged in the second fixing cylinder (412), and a spring is arranged between the hook disk (43) and the first fixing cylinder (411).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810620094.0A CN108703802B (en) | 2018-06-15 | 2018-06-15 | Orthopedic internal fixation screw taking-out device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810620094.0A CN108703802B (en) | 2018-06-15 | 2018-06-15 | Orthopedic internal fixation screw taking-out device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108703802A CN108703802A (en) | 2018-10-26 |
| CN108703802B true CN108703802B (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810620094.0A Expired - Fee Related CN108703802B (en) | 2018-06-15 | 2018-06-15 | Orthopedic internal fixation screw taking-out device |
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| CN (1) | CN108703802B (en) |
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| US5951554A (en) * | 1997-10-02 | 1999-09-14 | Holmes; Russell P. | Screw removal system |
| JP2008207285A (en) * | 2007-02-27 | 2008-09-11 | Yamaha Livingtec Corp | Screw fastening auxiliary tool |
| US8808339B2 (en) * | 2008-10-15 | 2014-08-19 | Us Spine, Inc. | Interlocking bone screw and washer concepts |
| CN105832401A (en) * | 2016-05-03 | 2016-08-10 | 丽水市人民医院 | Safe minimally-invasive screw remover for orthopedics department |
| CN105997230A (en) * | 2016-05-03 | 2016-10-12 | 丽水市人民医院 | Orthopaedic screw extraction device capable of easy extraction of broken screw |
| CN106890023A (en) * | 2017-03-29 | 2017-06-27 | 中国人民解放军第四军医大学 | It is a kind of to be suitable to the spinal bone screw pitman extractor of small otch |
| CN206543205U (en) * | 2016-11-22 | 2017-10-10 | 白德磊 | A kind of nail taking out apparatus in orthopaedics |
| WO2018033179A1 (en) * | 2016-08-19 | 2018-02-22 | Peter Witte | Torque limiter |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951554A (en) * | 1997-10-02 | 1999-09-14 | Holmes; Russell P. | Screw removal system |
| JP2008207285A (en) * | 2007-02-27 | 2008-09-11 | Yamaha Livingtec Corp | Screw fastening auxiliary tool |
| US8808339B2 (en) * | 2008-10-15 | 2014-08-19 | Us Spine, Inc. | Interlocking bone screw and washer concepts |
| CN105832401A (en) * | 2016-05-03 | 2016-08-10 | 丽水市人民医院 | Safe minimally-invasive screw remover for orthopedics department |
| CN105997230A (en) * | 2016-05-03 | 2016-10-12 | 丽水市人民医院 | Orthopaedic screw extraction device capable of easy extraction of broken screw |
| WO2018033179A1 (en) * | 2016-08-19 | 2018-02-22 | Peter Witte | Torque limiter |
| CN206543205U (en) * | 2016-11-22 | 2017-10-10 | 白德磊 | A kind of nail taking out apparatus in orthopaedics |
| CN106890023A (en) * | 2017-03-29 | 2017-06-27 | 中国人民解放军第四军医大学 | It is a kind of to be suitable to the spinal bone screw pitman extractor of small otch |
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| CN108703802A (en) | 2018-10-26 |
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Inventor after: Zhang Peinan Inventor after: Wu Na Inventor after: Yao Yao Inventor after: Liang Zhaoguo Inventor before: Liang Zhaoguo |
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Effective date of registration: 20200925 Address after: 075000 Department of orthopedics, First Affiliated Hospital of Hebei North University, No. 12 Changqing Road, Zhangjiakou, Hebei Applicant after: THE FIRST AFFILIATED HOSPITAL OF HEBEI NORTH University Address before: 150000 66 Youyi Road, Daoli District, Harbin, Heilongjiang Applicant before: Liang Zhaoguo |
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