CN108478268B - Orthopedic screw with hook - Google Patents
Orthopedic screw with hook Download PDFInfo
- Publication number
- CN108478268B CN108478268B CN201810531155.6A CN201810531155A CN108478268B CN 108478268 B CN108478268 B CN 108478268B CN 201810531155 A CN201810531155 A CN 201810531155A CN 108478268 B CN108478268 B CN 108478268B
- Authority
- CN
- China
- Prior art keywords
- screw
- hook
- hooked
- thread section
- retaining pieces
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- 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
- A61B17/68—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
Abstract
The invention relates to a hooked orthopaedics screw which comprises a screw body, wherein the screw body comprises a ball head and a screw part, a hollow installation cavity is formed in the screw part, a hook type assembly capable of preventing the screw from moving is arranged in the hollow installation cavity, the hook type assembly comprises a pair of hooked retaining pieces, a rotary pin and a supporting screw, the hooked retaining pieces are fixed in the middle of the hollow installation cavity and are connected through the rotary pin, the two hooked retaining pieces can rotate around the rotary pin, the supporting screw is correspondingly arranged above the hooked retaining pieces, the top end of the supporting screw is movably connected with the ball head, and the bottom end of the supporting screw abuts against the two hooked retaining pieces. The hooked orthopedic screw is effectively combined with the screw part through the special hooked retaining piece and the special hooked retaining piece, so that the firmness of fixing with the bone surface is greatly improved, the problems of loosening, moving, rotating, screw withdrawing and the like of the screw in the using process are prevented, the safety and the reliability of an operation are ensured, and the pain of a patient is reduced.
Description
Technical field:
the invention relates to the technical field of medical instruments, in particular to a hooked orthopedic screw.
The background technology is as follows:
screws are often required to be used in bone surgery, such as steel plates, which are required to be fixed on the surface of bones, intramedullary nails, which are required to be fixed in the bones, pedicle screws are screwed into pedicles and then fixed to stabilize lesion sites, and the screw structures are slightly different, but the front parts of the screws are in screw thread types, or single threads, double threads, single and double thread combination or only partial threads, and after the screws are screwed into the bones, the screws are loosened and even deviate due to long-term movement of patients and bone quality problems (such as deformity, osteoporosis and the like).
The invention comprises the following steps:
aiming at the defects of the prior art, the invention provides the hooked orthopedic screw which has a simple structure and is firm in fixation and capable of preventing the screw from backing out or rotating.
First, the problem of the screw engaging the bone surface is considered. In order to solve the problem, the existing manufacturers generally make articles on the threads of the screws and reinforce the screws by changing the sizes, the depths, the shapes, the number and the like of the threads, however, the improvement cannot avoid the problem of whirling loosening of the threads caused by external factors such as vibration, collision and the like, so that the technical problem cannot be fundamentally solved. Therefore, how to prevent the screw from rotating and loosening is a technical problem to be solved by the invention. When the technical problem is solved, the invention discloses a special retaining piece with a hook, which is effectively clamped with the bone surface of a human body in a mode of combining the retaining piece with the hook with a screw, so that the screw is prevented from rotating and loosening.
Secondly, the problem of how to drive the hooked retaining tab is considered. Because the screw has smaller volume and more limited structure, how to design a simple driving mechanism to drive the hooked retaining piece to be clamped or separated from the bone surface is another technical problem to be solved by the invention.
The invention is realized by the following technical scheme: the utility model provides a take hook-type orthopedics screw, includes the screw body, the screw body includes bulb and screw portion, have the cavity installation cavity in the screw portion, be provided with the hook-type subassembly that can prevent the screw removal in the cavity installation cavity, hook-type subassembly includes the tape hook backing piece, revolving pin and struts the screw, tape hook backing piece is a pair of, fixes at cavity installation cavity middle part, connects through the revolving pin between two tape hook backing pieces, and two tape hook backing pieces can wind the rotation of revolving pin, strut the screw and correspond to set up in tape hook backing piece top, strut screw top and bulb swing joint, the bottom offsets with two tape hook backing pieces and lean on, struts the screw and can reciprocate along the cavity installation cavity to drive two tape hook backing pieces and wind the rotation of revolving pin so that tape hook backing piece tip stretches out outside the screw portion.
In order to facilitate the lifting of the adjusting and expanding screw and solve the assembly problem, the preferable expanding screw comprises a driving part and a lifting part which are detachably connected, wherein a driving groove is formed in the driving part, the lifting part is connected with the inner wall of the screw part through threads, and an arc-shaped pushing block is arranged at the bottom end of the lifting part.
In order to enable the hooked thrust plate to be skillfully matched with the opening screw to achieve rotation, slope surfaces matched with the arc-shaped pushing blocks are arranged at the top ends of the two hooked thrust plates, the arc-shaped pushing blocks of the lifting part can slide along the two slope surfaces and push the two hooked thrust plates to rotate around the rotating pin through the slope surfaces, clamping grooves matched with the arc-shaped pushing blocks are respectively arranged on the two slope surfaces, and the arc-shaped pushing blocks can be simultaneously inserted into the clamping grooves.
In order to improve the firmness of the clamping, the top end of the retaining piece with the hook is provided with a first hook which extends outwards of the screw part.
In order to further improve the firmness of the clamping connection, the bottom end of the retaining piece with the hook is also provided with a second hook which extends outwards of the screw part.
In order to facilitate assembly, two sides are respectively provided with an open slot for the extension of the retaining piece with the hook and a pin shaft hole for installing the rotary pin.
In order to further prevent the risk of nail withdrawal, the diameter of the screw part gradually decreases from top to bottom, the screw part comprises a first thread section close to the ball head and a second thread section far away from the ball head, the pitch of the first thread section is smaller than that of the second thread section, the first thread section is a double-thread section, the second thread section is a single-thread section, the length of the first thread section is smaller than that of the second thread section, and the bottom of the second thread section is provided with a self-tapping head.
The beneficial effects of the invention are as follows: the hooked orthopedic screw is effectively combined with the screw part through the special hooked retaining piece and the special hooked retaining piece, so that the firmness of fixing with the bone surface is greatly improved, the problems of loosening, moving, rotating, screw withdrawing and the like of the screw in the using process are prevented, the safety and the reliability of an operation are ensured, and the pain of a patient is reduced.
Description of the drawings:
FIG. 1 is a schematic view of a preferred embodiment of a hooked orthopedic screw of the present invention;
FIG. 2 is a schematic structural view of a preferred embodiment of the hooked orthopedic screw of the present invention;
FIG. 3 is a schematic view of the hook retaining tab of FIG. 2;
FIG. 4 is a schematic view of the structure of the screw body of the present invention;
FIG. 5 is a schematic view of the structure of the distraction screw of the present invention;
FIG. 6 is a schematic view of the structure of the present invention before the back stop with hook is opened;
fig. 7 is a schematic structural view of the opened retaining plate with hook of the present invention.
The specific embodiment is as follows:
the preferred embodiments of the present invention will be described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention. The directional terms referred to in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the invention and is not limiting of the invention.
The hooked orthopaedics screw shown in fig. 1 and 2 comprises a screw body, the screw body comprises an integrated ball head 1 and a screw part 2, a hollow installation cavity 3 is arranged in the screw part 2, a hook-type component capable of preventing the screw from moving is arranged in the hollow installation cavity 3, the hook-type component comprises a hooked retaining piece 4, a rotary pin 5 and a spreading screw 6, the hooked retaining piece 4 is a pair, the middle part of the hollow installation cavity 3 is fixed, the two hooked retaining pieces 4 are connected through the rotary pin 5, the two hooked retaining pieces 4 can rotate around the rotary pin 5, the spreading screw 6 is correspondingly arranged above the hooked retaining piece 4, the top end of the spreading screw 6 is movably connected with the ball head 1, the bottom end of the spreading screw 6 abuts against the two hooked retaining pieces 4, the spreading screw 6 can vertically move, and the two hooked retaining pieces 4 are driven to rotate around the rotary pin 5 so that the two ends of the hooked retaining pieces 4 extend out of the screw part 2.
The expanding screw shown in fig. 5 comprises a driving part 61 and a lifting part 62 which are detachably connected, wherein a driving groove 63 is formed in the driving part 61, specifically, the driving groove 63 can be quincuncial and is convenient to rotate, the lifting part 62 is connected with the inner wall of the screw part 2 through threads, the lifting part 62 can be driven to ascend or descend by rotating the driving part 61, and an arc-shaped pushing block 64 is arranged at the bottom end of the lifting part 62.
As shown in fig. 3, the top ends of the two retaining pieces 4 with hooks are provided with slope surfaces 41 matched with the arc-shaped push blocks 64, the arc-shaped push blocks 64 of the lifting part 62 can slide along the two slope surfaces 41 and push the two retaining pieces 4 with hooks to rotate around the rotary pin 5 through the slope surfaces 41, the two slope surfaces 41 are respectively provided with arc-shaped clamping grooves matched with the arc-shaped push blocks 64, and the arc-shaped push blocks 64 can be simultaneously inserted into the clamping grooves. The top end of the retaining piece 4 with the hook is provided with a first hook 42 which expands outwards towards the screw part 2, and further, the bottom end of the retaining piece 4 with the hook is also provided with a second hook 44 which extends outwards towards the screw part 2, namely, two ends of the retaining pieces with the hook are both provided with hook parts, and the retaining pieces with the hook parts can be effectively clamped with the bone surface of a human body.
As shown in fig. 4, the diameter of the screw portion gradually decreases from top to bottom, that is, the whole screw portion approximately forms a cone structure, the screw portion includes a first thread section 21 close to the ball head 1 and a second thread section 22 far away from the ball head 1, the pitch of the first thread section 21 is smaller than that of the second thread section 22, the first thread section 21 is a double-line thread section, the second thread section 22 is a single-line thread section, the length of the first thread section 21 is the same as that of the second thread section 22, the bottom of the second thread section 22 is provided with a self-tapping head 23, and two sides of the screw portion respectively and correspondingly provide an open slot 24 from which the hooked retaining piece 4 can extend and a pin shaft hole 25 for installing the rotary pin 5.
As shown in fig. 6, before use, the two hooked retaining pieces 4 are accommodated in the hollow installation cavity of the screw part 2, and the appearance structure of the screw is similar to that of a common screw; when the screw is used, as shown in fig. 7, the screw is implanted into the bone surface of a human body, the screw 6 is screwed clockwise through a tool, the screw 6 drives the arc-shaped push block 62 at the bottom to gradually descend under the action of threads, the arc-shaped push block 62 gradually descends along the slope surfaces at the top ends of the two hooked retaining pieces 4, and simultaneously drives one hooked retaining piece 4 to rotate clockwise around the rotary pin 5 and drives the other hooked retaining piece 4 to rotate anticlockwise around the rotary pin 5, so that two ends of the two hooked retaining pieces 4 extend out of the screw part 2 respectively to form an X-shaped structure, and the first hooks 42 and the second hooks 44 at two ends of the two hooked retaining pieces 4 can be effectively clamped with the bone surface of the human body, thereby preventing the screw from loosening or rotating.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (5)
1. The utility model provides a take hook formula orthopedics screw, includes the screw body, the screw body includes bulb and screw portion, its characterized in that: the screw part is internally provided with a hollow mounting cavity, the hollow mounting cavity is internally provided with a hook-type assembly capable of preventing the screw from moving, the hook-type assembly comprises a pair of hook retaining pieces, a rotary pin and a supporting screw, the pair of hook retaining pieces are fixed in the middle of the hollow mounting cavity, the two hook retaining pieces are connected through the rotary pin and can rotate around a rotary pin, the supporting screw is correspondingly arranged above the hook retaining pieces, the top end of the supporting screw is movably connected with the ball head, the bottom end of the supporting screw abuts against the two hook retaining pieces, the supporting screw can move up and down along the hollow mounting cavity, and the two hook retaining pieces are driven to rotate around the rotary pin so that the end parts of the hook retaining pieces extend out of the screw part;
the expanding screw comprises a driving part and a lifting part which are detachably connected, a driving groove is formed in the driving part, the lifting part is connected with the inner wall of the screw part through threads, and an arc-shaped pushing block is arranged at the bottom end of the lifting part;
the top ends of the two hooked retaining pieces are provided with slope surfaces matched with the arc-shaped push blocks, the arc-shaped push blocks of the lifting part can slide along the two slope surfaces and push the two hooked retaining pieces to rotate around the rotary pin through the slope surfaces, the two slope surfaces are respectively provided with clamping grooves matched with the arc-shaped push blocks, and the arc-shaped push blocks can be simultaneously inserted into the clamping grooves;
the top end of the retaining piece with the hook is provided with a first hook extending outwards of the screw part, and the bottom end of the retaining piece with the hook is provided with a second hook extending outwards of the screw part;
the screw part comprises a first thread section close to the ball head and a second thread section far away from the ball head, and the pitch of the first thread section is smaller than that of the second thread section.
2. The hooked orthopedic screw according to claim 1, characterized in that: open slots which can be used for the extension of the retaining piece with the hook and pin shaft holes for installing the rotary pins are correspondingly formed on two sides of the screw part respectively.
3. The hooked orthopedic screw according to claim 1, characterized in that: the diameter of the screw portion gradually decreases from top to bottom.
4. The hooked orthopedic screw according to claim 1, characterized in that: the first thread section is a double-thread section, the second thread section is a single-thread section, and the length of the first thread section is smaller than that of the second thread section.
5. The hooked orthopedic screw according to claim 4, characterized in that: the bottom of the second thread section is provided with a self-tapping head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810531155.6A CN108478268B (en) | 2018-05-29 | 2018-05-29 | Orthopedic screw with hook |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810531155.6A CN108478268B (en) | 2018-05-29 | 2018-05-29 | Orthopedic screw with hook |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108478268A CN108478268A (en) | 2018-09-04 |
| CN108478268B true CN108478268B (en) | 2023-09-12 |
Family
ID=63351299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810531155.6A Active CN108478268B (en) | 2018-05-29 | 2018-05-29 | Orthopedic screw with hook |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108478268B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4060279A1 (en) | 2019-04-17 | 2022-09-21 | Magpul Industries Corp. | Bipod with sling stud mount |
| CN111588455B (en) * | 2020-05-30 | 2021-07-23 | 刘蕾 | Bone connecting device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3608163A1 (en) * | 1986-03-12 | 1987-09-24 | Walter A Dr Med Laabs | Device for dynamically/rigidly locking the distal and proximal parts of fractured bones |
| DE19731298A1 (en) * | 1996-12-30 | 1999-11-18 | Basheir Madhoon | Nail system for intramedullar osteosynthesis of fractures and total end prostheses |
| CN2403374Y (en) * | 2000-01-03 | 2000-11-01 | 彭义德 | Combined self-locking intramedullary nail |
| CN202619835U (en) * | 2011-12-13 | 2012-12-26 | 北京市富乐科技开发有限公司 | Single-core pedicle nail |
| CN104287819A (en) * | 2014-10-09 | 2015-01-21 | 中国人民解放军第四军医大学 | Medical pedicle screw component with telescopic double thread and capable of resisting pullout |
| WO2015056328A1 (en) * | 2013-10-17 | 2015-04-23 | プロスパー株式会社 | Osteosynthesis tool and osteosynthesis technique |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9089377B2 (en) * | 2009-02-23 | 2015-07-28 | Orthopediatrics Corp. | Bone screw |
-
2018
- 2018-05-29 CN CN201810531155.6A patent/CN108478268B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3608163A1 (en) * | 1986-03-12 | 1987-09-24 | Walter A Dr Med Laabs | Device for dynamically/rigidly locking the distal and proximal parts of fractured bones |
| DE19731298A1 (en) * | 1996-12-30 | 1999-11-18 | Basheir Madhoon | Nail system for intramedullar osteosynthesis of fractures and total end prostheses |
| CN2403374Y (en) * | 2000-01-03 | 2000-11-01 | 彭义德 | Combined self-locking intramedullary nail |
| CN202619835U (en) * | 2011-12-13 | 2012-12-26 | 北京市富乐科技开发有限公司 | Single-core pedicle nail |
| WO2015056328A1 (en) * | 2013-10-17 | 2015-04-23 | プロスパー株式会社 | Osteosynthesis tool and osteosynthesis technique |
| CN104287819A (en) * | 2014-10-09 | 2015-01-21 | 中国人民解放军第四军医大学 | Medical pedicle screw component with telescopic double thread and capable of resisting pullout |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108478268A (en) | 2018-09-04 |
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