CN118021416A - Series connection combined arc screw - Google Patents
Series connection combined arc screw Download PDFInfo
- Publication number
- CN118021416A CN118021416A CN202410303833.9A CN202410303833A CN118021416A CN 118021416 A CN118021416 A CN 118021416A CN 202410303833 A CN202410303833 A CN 202410303833A CN 118021416 A CN118021416 A CN 118021416A
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- Prior art keywords
- arc
- screw
- head
- neck
- shaped
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- 210000000988 bone and bone Anatomy 0.000 claims abstract description 30
- 230000001054 cortical effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 210000001185 bone marrow Anatomy 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims 2
- 210000004197 pelvis Anatomy 0.000 abstract description 12
- 210000003692 ilium Anatomy 0.000 abstract description 11
- 210000000614 rib Anatomy 0.000 abstract description 7
- 239000007943 implant Substances 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000003689 pubic bone Anatomy 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 210000001981 hip bone Anatomy 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary devices, e.g. pins or nails
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to a series combination arc-shaped screw nail. The invention includes a head having an axially extending and hollow core; a neck portion which is bent and extends to one axial end of the head portion; the tail part is connected with the head part through the neck part, and an included angle is formed between the tail part axis and the head part axis; wherein, between two adjacent arc screw, one of them the afterbody of arc screw can with another arc screw the core is through screw thread cooperation in order to establish ties, through a plurality of arc screw establishes ties in order to match in the radian of arc skeleton, implants arc screw in the arc skeleton intramedullary far end with single arc screw under the guide wire guide to with the neck angulation is placed in the same angulation direction with arc skeleton radian, implants arc screw in proper order. The invention overcomes the defect that long arc screw nails cannot be implanted into bones with arc structures such as pelvis, ilium or rib, etc. for fixation.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a serial combined arc-shaped threaded nail.
Background
The ribs are arc-shaped. The pelvis is a circular arc-shaped basin-shaped structure formed by sacrum, coccyx and ilium (or hip bone), and has the characteristics of a cone shape with wide upper part and narrow lower part in the whole shape. Therefore, after fracture of ribs and pelvis, the bones with the arc-shaped structure are only suitable for the unthreaded arc-shaped nails and elastic nails to be implanted into the intramedullary canal for fixation, or the arc-shaped steel plates and the arc-shaped claws are used for being placed on the surfaces of the bones to achieve the fixation effect, and the long straight threaded nails cannot be used for fixation in the intramedullary canal, because the long straight threaded nails cannot be screwed into the arc-shaped intramedullary canal in a rotating way, but short threaded nails can be used for fixation in the intramedullary canal for a short distance. At present, the channel threads used after the fractures of the ribs, ilium and pubis are fixed in the intramedullary cavities of the ilium and pubis by using short thread nails. Therefore, the fixation by using long-distance arc-shaped screw nails in bone marrow cavities with arc-shaped structures such as ribs, pelvis or ilium is not realized at present.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem that the fixation of the arc-shaped structural bone marrow cavity of ribs, pelvis or ilium and the like by using long-distance arc-shaped screw nails cannot be realized in the prior art.
In order to solve the technical problems, the invention provides a serial combined arc-shaped screw nail, which comprises:
A head having an axially extending and hollow core;
a neck portion which is bent and extends to one axial end of the head portion;
the tail part is connected with the head part through the neck part, and an included angle is formed between the tail part axis and the head part axis;
Wherein, between two adjacent arc screw nails, the afterbody of one of them arc screw nail can with another arc screw nail the core is through screw thread cooperation in order to carry out the series connection, through a plurality of arc screw nail carries out the series connection in order to match the radian of arc skeleton.
In one embodiment of the invention, the head outer surface has external threads for fixation to cancellous bone of an arcuate bone.
In one embodiment of the present invention, the pitch of the external thread and/or the diameter of the head of the latter arc-shaped screw is equal to or slightly greater than the pitch of the external thread and/or the diameter of the head of the former arc-shaped screw in the serial direction of the plurality of arc-shaped screws.
In one embodiment of the invention, the shape of the neck section comprises an arc or trapezoid and the surface is smooth.
In one embodiment of the invention, the radial dimension of the neck is smaller than the radial dimension of the head.
In one embodiment of the invention, the diameter of the tail end rotation generating track is smaller than the diameter of the head rotation generating track as the head rotates along its central axis.
In one embodiment of the invention, the tail end is of a hollow square structure, so that the tail end is suitable for being anastomotic with the head of a soft drill driver, the position of the tail end is kept unchanged in the screwing process, and the direction of the bending radian is conveniently marked; the first arc-shaped screw nail is rotationally implanted to the most distal end in the pelvis or ilium marrow cavity or penetrates out of the most distal cortical bone to be fixed under the guidance of the guide wire through the soft drill opener, and the angulation of the neck is kept consistent with the radian direction of the arc-shaped bone; the neck angulation of the next arc-shaped screw nail is kept consistent with the arc direction of the arc bone through the soft drill opener and the next arc-shaped screw nail and the first arc-shaped screw nail are connected in series under the guidance of the guide wire, and the process is repeated until the arc-shaped screw nail after being connected in series reaches the needle inlet.
In one embodiment of the invention, the tail and the core are mated by means of a tapered thread.
In one embodiment of the invention, the core includes a tapered threaded bore and the core tapers in diameter in a direction toward the neck, the tail includes an external tapered thread that mates with the tapered threaded bore and the tail tapers in diameter in a direction away from the neck.
In one embodiment of the present invention, the arc screw comprises medical metal or industrial metal.
Compared with the prior art, the technical scheme of the invention has the following advantages:
According to the serial combined arc-shaped screw nail, the plurality of arc-shaped screw nails are connected into the integral external screw nail with a certain radian by virtue of the matched threads of the core part and the tail part, so that the integral external screw nail can penetrate through the whole arc-shaped skeleton and even form a complete arc shape to fix the whole pelvis. In addition, the neck of the arc-shaped screw nail is provided with a certain angle, and the arc-shaped screw nails with different radians can be flexibly selected according to the needs, so that the radian of the integral screw nail is matched with the radian of a used bone.
The angulation of the neck of the arc-shaped screw leads to the expansion of the diameter of the track when the tail end rotates, but is smaller than the diameter of the track when the head rotates, so that adverse influence on the anchoring and fixing stability of the next arc-shaped screw implantation caused by the expansion of the track of the tail end is avoided.
The arc-shaped screw nail is fixed with cancellous bone in a circular arc-shaped bone marrow cavity such as pelvis or ilium or cortical bone at the edge by means of the external thread of the head, and has reliable fixation stability.
The tail part of the arc-shaped threaded nail is designed into a trapezoid structure with gradually smaller diameter, the tail end is smaller, the core diameter corresponding to the head part of the arc-shaped threaded nail is larger, the tail end of the smaller tail part plays a role in guiding the arc-shaped threaded nail, and therefore the blind area at a far position can be easily connected; when the screw pitch of the external screw thread of the (n+1) th arc screw thread positioned behind the fracture end is larger than that of the external screw thread of the (n) th arc screw thread positioned in front of the fracture end, the screwed (n+1) th arc screw thread produces a pressurizing effect on the fracture end.
In addition, the later arc-shaped screw nail and the former arc-shaped screw nail are connected to form a longer arc-shaped screw nail, and the longer arc-shaped screw nail cannot rotate together in the marrow cavity of the arc-shaped structure, so that the effect or phenomenon that the later arc-shaped screw nail drives the former arc-shaped screw nail to rotate together after being connected is automatically avoided.
The hollow square structure at the tail end of the arc-shaped threaded nail is convenient for keeping the position unchanged after being anastomotic and connected with the square structure at the head of the soft drill opener and marking the direction of the bending radian of the neck.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.
FIG. 1 is a schematic view of the arcuate screw structure of the present invention.
Fig. 2 is a schematic view of the arcuate screw structure of the present invention as it rotates.
FIG. 3 is a schematic representation of the present invention with a plurality of arcuate screw threads in series.
Description of the specification reference numerals:
1. A head; 11. an external thread;
2. A core; 21. a tapered threaded bore;
3. A neck;
4. Tail part; 41. an external cone thread; 42. square structure.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
In the present invention, if directions (up, down, left, right, front and rear) are described, they are merely for convenience of description of the technical solution of the present invention, and do not indicate or imply that the technical features must be in a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, "a plurality of" means one or more, and "a plurality of" means two or more, and "greater than", "less than", "exceeding", etc. are understood to not include the present number; "above", "below", "within" and the like are understood to include this number. In the description of the present invention, the description of "first" and "second" if any is used solely for the purpose of distinguishing between technical features and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the present invention, unless clearly defined otherwise, terms such as "disposed," "mounted," "connected," and the like should be construed broadly and may be connected directly or indirectly through an intermediate medium, for example; the connecting device can be fixedly connected, detachably connected and integrally formed; can be mechanically connected, electrically connected or capable of communicating with each other; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the invention can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.
Referring to fig. 1 to 3, a serial combination arc screw of the present invention comprises:
A head 1 having an axially extending and hollow core 2;
A neck 3 which is bent and extends at one axial end of the head 1;
A tail 4 connected to the head 1 through the neck 3, wherein an included angle (α in fig. 2) is formed between the axis of the tail 4 and the axial direction of the head 1;
wherein, between two adjacent arc screw nails, the tail 4 of one arc screw nail can be connected with the core 2 of the other arc screw nail in series through screw thread fit, and connected in series through a plurality of arc screw nails to be matched with the radian of an arc bone.
Through the arrangement, the integral external screw thread 11 nail with certain radian is formed by the matched screw threads of the core part 2 and the tail part 4 through the plurality of arc screw threads, and can penetrate through the whole arc bone and even form a complete arc shape to fix the whole pelvis. In addition, the neck part 3 of the arc-shaped screw nail has a certain angulation, and the arc-shaped screw nails with different radians can be flexibly selected according to the needs, so that the radian of the whole screw nail is matched with the radian of a used bone. The later arc-shaped screw nail and the former arc-shaped screw nail are connected to form a longer arc-shaped screw nail, and the longer arc-shaped screw nail cannot rotate together in the marrow cavity of the arc-shaped structure, so that the effect or phenomenon that the later arc-shaped screw nail drives the former arc-shaped screw nail to rotate together after being connected is automatically avoided.
It can be understood that the included angle of the arc screw nails can be set according to the requirement, and the sum of the included angles of the arc screw nails after being connected in series is the angulation of the whole arc screw nails, such as: the angulation of the single arc-shaped screw nail is 10 degrees, and the angulation of the integral arc-shaped screw nail after ten arc-shaped screw nails are connected in series is 100 degrees.
Specifically, the outer surface of the head 1 has external threads 11 for fixation to cancellous bone of an arcuate bone. The external thread 11 is fixed with cancellous bone in the marrow cavity of arc bones such as ribs, pelvis or ilium, or cortical bone at the edge, and has reliable fixation stability.
Specifically, in the serial direction of the plurality of arc-shaped screw nails, the pitch of the external thread 11 and/or the diameter of the head 1 of the latter arc-shaped screw nail are equal to or slightly larger than the pitch of the external thread 11 and/or the diameter of the head 1 of the former arc-shaped screw nail. When the pitch of the external thread 11 of the (n+1) th arc-shaped screw positioned behind the fracture is larger than that of the external thread 11 of the (n) th arc-shaped screw positioned in front of the fracture, the (n+1) th arc-shaped screw screwed in pressurizes the fracture end.
Specifically, the shape of the cross section of the neck 3 comprises an arc shape or a trapezoid shape, and the surface is smooth, so that an included angle is formed between the axis of the tail 4 and the axial direction of the head 1; the radial dimension of the neck 3 is smaller than the radial dimension of the head 1.
Referring to fig. 2, when the head 1 rotates along its central axis, the diameter (D) of the rotation-generating track of the tail 4 is smaller than the diameter (D) of the rotation-generating track of the head 1. Thereby avoiding the adverse effect on the anchoring stability of the next arc-shaped screw implantation caused by the enlarged track of the tail end 4.
Specifically, the tail end 4 is provided with a hollow square structure 42, so that the position of the tail end is kept unchanged in the screwing process after the tail end is matched and connected with the square structure of the head of the soft drill driver, the screw is conveniently screwed in, the direction of the bending radian is conveniently marked, and the implanted arc-shaped threaded nail is ensured to be consistent with the radian of an arc-shaped skeleton. The first arc-shaped screw nail is rotationally implanted to the most distal end in the pelvis or ilium marrow cavity or penetrates out of the most distal cortical bone to be fixed under the guidance of the guide wire through the soft drill opener, and the angulation of the neck is kept consistent with the radian direction of the arc-shaped bone; the neck angulation of the next arc-shaped screw nail is kept consistent with the arc direction of the arc bone through the soft drill opener and the next arc-shaped screw nail and the first arc-shaped screw nail are connected in series under the guidance of the guide wire, and the process is repeated until the arc-shaped screw nail after being connected in series reaches the needle inlet.
Specifically, the tail 4 and the core 2 are engaged by means of a conical screw thread; preferably, the core 2 is coaxially arranged with the head 1 and comprises a tapered threaded hole 21, and the diameter of the core 2 gradually decreases along the direction approaching the neck 3, the tail 4 comprises an external tapered thread 41 matched with the tapered threaded hole 21, and the diameter of the tail 4 gradually decreases along the direction away from the neck 3. Through the arrangement, the tail end 4 is smaller, the diameter of the core part 2 corresponding to the head 1 of the arc-shaped screw nail is larger, and the tail end 4 of the smaller tail end plays a role in guiding the arc-shaped screw nail, so that the connection can be easily realized in a dead zone at a far position.
Specifically, the arc screw nail comprises medical metal or industrial metal materials, such as stainless steel, titanium, magnesium alloy or memory alloy.
In the use process, the soft drill driver is connected with the tail end 4 of the first arc-shaped screw nail, the direction in which the neck 3 is angled (the direction in which the angulation on the neck 3 faces) is marked, the distal end which is implanted into the pelvis or ilium marrow cavity is rotated under the guide of the guide wire, the distal end cortical bone can be penetrated out for fixation, the angulation of the neck 3 is placed in the same angulation direction with the arc bone radian, the soft drill driver is withdrawn, then the soft drill driver is connected with the tail end 4 of the second arc-shaped screw nail, the direction in which the neck 3 is angled is marked, the neck 3 is rotationally implanted into the tail end 4 of the first arc-shaped screw nail under the guide of the guide wire until the neck 3 is tightly connected with the arc bone radian by means of threads, meanwhile, the third arc-shaped screw nail, the fourth arc-shaped screw nail and the like are sequentially implanted until the arc-shaped screw nail after serial connection reaches the needle inlet.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (10)
1. A tandem combination arc screw comprising:
A head (1) having an axially extending and hollow core (2);
a neck (3) which is bent and extends at one axial end of the head (1);
The tail part (4) is connected with the head part (1) through the neck part (3), and an included angle is formed between the axis of the tail part (4) and the axial direction of the head part (1);
wherein, between two adjacent arc screw nails, the afterbody (4) of one arc screw nail can with another arc screw nail core (2) is through screw thread cooperation in order to carry out the series connection, carries out the series connection in order to match in the radian of arc skeleton through a plurality of arc screw nails.
2. A tandem combination arc screw according to claim 1, characterized in that the outer surface of the head (1) is provided with external threads (11) for fixation to cancellous bone of an arc bone.
3. A tandem combination arc screw according to claim 2, characterized in that the pitch of the external thread (11) and/or the diameter of the head (1) of the subsequent arc screw is equal to or slightly larger than the pitch of the corresponding external thread (11) and/or the diameter of the head (1) of the previous arc screw in the tandem direction of the plurality of arc screws.
4. A series combination arc screw according to claim 1, characterized in that the shape of the neck (3) cross section comprises an arc or trapezoid and is smooth.
5. A series combination arc screw according to claim 4, characterized in that the radial dimension of the neck (3) is smaller than the radial dimension of the head (1).
6. A serially combined arc screw according to claim 1, characterized in that the diameter of the trajectory generated by the rotation of the tail (4) end is smaller than the diameter of the trajectory generated by the rotation of the head (1) when the head (1) rotates along its central axis.
7. A serial combination arc screw according to claim 1, characterized in that the tail (4) is terminated with a hollow square structure (42) adapted to be connected in a mating manner with the square head of a soft drill driver; the first arc-shaped screw nail is rotationally implanted to the farthest end in the arc-shaped bone marrow cavity or penetrates out of the cortical bone at the farthest end through a soft drill opener under the guidance of a guide wire so as to be fixed, and the angulation of the neck is kept consistent with the radian direction of the arc-shaped bone; the neck angulation of the next arc-shaped screw nail is kept consistent with the arc direction of the arc bone through the soft drill opener and the next arc-shaped screw nail and the first arc-shaped screw nail are connected in series under the guidance of the guide wire, and the process is repeated until the arc-shaped screw nail after being connected in series reaches the needle inlet.
8. A tandem combination arc screw according to claim 1, characterized in that the tail (4) and the core (2) are engaged by means of a conical screw thread.
9. A serially combined arc screw as claimed in claim 8 wherein said core (2) comprises a tapered threaded bore (21) and said core (2) tapers in diameter in a direction approaching said neck (3), said tail (4) comprises an external tapered thread (41) mating with said tapered threaded bore (21) and said tail (4) tapers in diameter in a direction away from said neck (3).
10. The tandem combination arc screw of claim 1 wherein the arc screw comprises medical metal or industrial metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410303833.9A CN118021416B (en) | 2024-03-18 | 2024-03-18 | Series connection combined arc screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410303833.9A CN118021416B (en) | 2024-03-18 | 2024-03-18 | Series connection combined arc screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118021416A true CN118021416A (en) | 2024-05-14 |
| CN118021416B CN118021416B (en) | 2024-08-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410303833.9A Active CN118021416B (en) | 2024-03-18 | 2024-03-18 | Series connection combined arc screw |
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| CN (1) | CN118021416B (en) |
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| US20040243139A1 (en) * | 2003-04-28 | 2004-12-02 | Lewis Derek S. | Multiple screw delivery apparatus |
| CN202933003U (en) * | 2012-10-17 | 2013-05-15 | 闫铭 | Fixer for minimally-invasive reset of spine centrum fractures |
| JP2013128667A (en) * | 2011-12-21 | 2013-07-04 | Yamaguchi Prefectural Industrial Technology Institute | Angle fixing implement |
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2024
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| FR2653006A1 (en) * | 1989-10-12 | 1991-04-19 | Dorange Arnaud | Centromedullary nail with a multiplicity of internal fixators |
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| Publication number | Publication date |
|---|---|
| CN118021416B (en) | 2024-08-02 |
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