CN111658108A - Fastening nail seat, nail rod locking device and spine fixing system - Google Patents
Fastening nail seat, nail rod locking device and spine fixing system Download PDFInfo
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- CN111658108A CN111658108A CN202010593909.8A CN202010593909A CN111658108A CN 111658108 A CN111658108 A CN 111658108A CN 202010593909 A CN202010593909 A CN 202010593909A CN 111658108 A CN111658108 A CN 111658108A
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- 241001079814 Symphyotrichum pilosum Species 0.000 title abstract description 11
- 235000004224 Typha angustifolia Nutrition 0.000 title abstract description 11
- 230000000694 effects Effects 0.000 description 12
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 208000005198 spinal stenosis Diseases 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
- A61B17/7064—Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
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- Orthopedic Medicine & Surgery (AREA)
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Abstract
The invention provides a fastening nail seat, a nail rod locking device and a spine fixing system, wherein the fastening nail seat comprises a nail seat barrel and a fastening screw; the set screw is coaxially arranged with the nail seat barrel, and the set screw is arranged in the nail seat barrel; the set screw is in threaded connection with the screw seat barrel through the hook lock threads; in the radial section of the set screw, the section of the external thread of the set screw is L-shaped, the section comprises an extension section and a hook locking section, the hook locking section is connected with the body of the set screw through the extension section, and the extension direction of the hook locking section is opposite to the screwing direction of the set screw; two opposite guide grooves are formed in the side wall of the nail seat barrel, extend along the axis direction of the nail seat barrel and are used for placing a connecting rod of the spine fixing system along the direction perpendicular to the axis of the nail seat barrel. The fastening screw seat of the invention compresses the connecting rod by the set screw, and the set screw is in threaded connection with the screw seat barrel through the hook lock thread, and the hook lock thread enables the set screw and the screw seat barrel to realize interlocking, thereby improving the locking and anti-loosening functions of the set screw.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a fastening nail seat, a nail rod locking device and a spine fixing system.
Background
The spinal fixator is a frequently used instrument for treating diseases such as vertebral body sliding, spinal stenosis and spinal degeneration in clinic. The spinal fixator is mainly composed of a screw seat barrel, a set screw, a pedicle screw, a connecting rod, a transverse connecting rod and the like.
The key link of the spine fixator is that the connecting rod is fixed between the set screw and the pedicle screw by the set screw.
In prior spinal fixation devices, the set screw is typically threadedly connected to the cartridge barrel, and the threads are conventional standard or negative angle threads. The two threaded connection modes have poor locking effect and insufficient anti-loosening function.
Disclosure of Invention
The present invention is directed to a fastening nail seat, a nail rod locking device and a spine fixation system, which help solve the above-mentioned problems.
The invention is realized by the following steps:
a fastening nail seat comprises a nail seat barrel and a fastening screw; the set screw is coaxially arranged with the nail seat barrel, and the set screw is arranged in the nail seat barrel; the set screw is in threaded connection with the nail seat barrel through a hook lock thread; in the radial section of the set screw, the section of the external thread of the set screw is L-shaped, the section comprises an extension section and a hook lock section, the hook lock section is connected with the body of the set screw through the extension section, and the extension direction of the hook lock section is opposite to the screwing direction of the set screw; the side wall of the nail seat barrel is provided with two opposite guide grooves, the guide grooves extend along the axis direction of the nail seat barrel and are used for being placed into a connecting rod of a vertebral fixing system along the direction vertical to the axis of the nail seat barrel; and driving the set screw to move in the nail seat barrel, wherein the set screw can push the connecting rod to move along the axial direction of the nail seat barrel.
The working principle of the fastening nail seat is as follows:
in screwing the set screw with the external screw thread as the hook lock screw thread into the nail seat barrel with the internal screw thread as the hook lock screw thread, compared with the conventional screw thread and the negative angle screw thread, the set screw and the nail seat barrel can achieve the interlocking effect, and the good locking and anti-loosening purposes can be realized.
Further, the extension section is inclined toward the withdrawal direction of the set screw. The technical effects are as follows: the extension is similar to the extension of the negative angle thread, but the end of the extension in the hook lock thread is not a sharp end, but rather is connected to the hook lock section. At this time, the connecting rod is positioned in front of the set screw, and the tighter the set screw presses the connecting rod, the greater the reaction force of the connecting rod to the set screw is, the greater the embracing force of the hook lock thread to the set screw body (due to the extending direction of the hook lock section being opposite to the screwing direction of the set screw) is, so the stronger the locking and retaining capabilities of the set screw in the fastening screw seat are.
Further, the nail seat barrel is provided with an annular lead-in groove; the annular lead-in groove is arranged on the end face, placed into the set screw, of the nail seat barrel and is coaxial with the nail seat barrel; the diameter of the annular lead-in groove is equal to the diameter of the external thread of the set screw. The technical effects are as follows: the annular lead-in groove is favorable for smoothly putting the set screw into the inner cavity of the screw seat barrel, avoids the situations of thread slipping, tooth staggering and the like when the set screw is screwed in, and reduces the probability of damage of the set screw in the operation.
Further, the set screw is provided with a first annular groove; the first ring groove is arranged on the outer side of the set screw in a winding mode. The technical effects are as follows: the arrangement of the first ring groove reduces the cross sectional area of the set screw at the first ring groove and reduces the bearable shearing force at the position. When the degree of depth reasonable in design of first annular, screw into holding screw hard and will make holding screw fracture in first annular department, prevent excessively to extrude the connective bar and damaged the structure of hook lock screw thread.
Further, the external thread of the set screw is disposed between the front end of the set screw and the first ring groove. The technical effects are as follows: after the set screw is broken, only the threads between the front end of the set screw and the first annular groove bear the threaded connection effect, so that the threads are not arranged on other outer side walls of the set screw. And, a part of the broken fastening screw is easier to be taken out from the nail seat barrel because the screw thread is not arranged.
Further, the nail seat barrel is provided with a second ring groove; the second annular groove is arranged on the outer side of the nail seat barrel in a surrounding mode. The technical effects are as follows: the second ring groove functions similarly to the first ring groove, and when the nail holder barrel is too long, the redundant part can be removed by screwing the nail holder barrel.
A nail rod locking device comprises a connecting rod, a plurality of pedicle screws and the fastening nail seat, wherein the connecting rod penetrates through a plurality of nail seat cylinders through the guide grooves, and the pedicle screws are arranged in the nail seat cylinders; the set screw, the connecting rod and the pedicle screw are sequentially arranged in the screw seat barrel.
Furthermore, the pedicle screw is connected with the screw seat barrel through the head of the pedicle screw, and the axis of the pedicle screw can be superposed with the axis of the screw seat barrel or crossed in an inclined angle. The technical effects are as follows: the through hole for installing the pedicle screw is a universal through hole, so that the pedicle screw can be placed into a skeleton in a larger angle range, and the requirement of the installation space of the nail-rod locking device in an operation is met.
The spinal fixation system comprises a cross link rod and at least two nail rod locking devices, wherein one end of the cross link rod is connected with one connecting rod, and the other end of the cross link rod is connected with the other connecting rod.
Further, the length of the cross link can be adjusted. The technical effects are as follows: the length of the cross-linking rod is adjustable, so that the height and the bone size of different patients can be met, the adaptability of the spine fixing system is stronger, and the surgical needs of more people can be met under the condition that instruments do not need to be replaced. Specifically, the cross link rod can be a telescopic structure formed by sleeving a straight rod and a sleeve, and can also be fixedly arranged on one connecting rod at one end of the cross link rod, and the other end of the cross link rod is in threaded connection with the corresponding connecting rod.
The invention has the beneficial effects that:
according to the fastening screw seat, the screw rod locking device and the spine fixing system, the connecting rod is tightly pressed by the fastening screw, the fastening screw is in threaded connection with the screw seat barrel through the hook lock thread, the hook lock thread enables the fastening screw and the screw seat barrel to be interlocked, and the locking and anti-loosening functions of the fastening screw are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the internal structure of a fastening nail seat according to a first embodiment of the present invention;
FIG. 2 is a perspective view of a fastening nail seat according to a first embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a schematic view of the internal structure of a fastening nail seat according to a second embodiment of the present invention;
FIG. 5 is a partial enlarged view of the portion B in FIG. 4;
FIG. 6 is a schematic view of the internal structure of a fastening nail seat according to a third embodiment of the present invention;
FIG. 7 is a schematic view of the internal structure of a fastening nail seat according to a fourth embodiment of the present invention;
FIG. 8 is a schematic view of the internal structure of a fastening nail seat according to a fifth embodiment of the present invention;
FIG. 9 is a schematic perspective view of a nail bar locking device according to a sixth embodiment of the invention;
fig. 10 is a perspective view of a vertebral fixation system according to a seventh embodiment of the present invention.
In the figure: 100-nail seat cylinder; 101-a guide groove; 102-an annular lead-in groove; 103-a second ring groove; 200-set screws; 201-a first ring groove; 300-an extension section; 400-hook lock section; 500-a connecting rod; 600-pedicle screws; 700-cross link.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention that are generally described and illustrated in the figures can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The first embodiment:
FIG. 1 is a schematic view of the internal structure of a fastening nail seat according to a first embodiment of the present invention; FIG. 2 is a perspective view of a fastening nail seat according to a first embodiment of the present invention; fig. 3 is a partially enlarged view of a portion a in fig. 1. Referring to fig. 1, 2 and 3, the present embodiment provides a fastening nail seat, which includes a nail seat barrel 100 and a set screw 200.
Wherein, the set screw 200 is arranged coaxially with the nail seat barrel 100, and the set screw 200 is arranged in the nail seat barrel 100; the set screw 200 is threadedly engaged with the nail holder cartridge 100 via a hook and lock thread.
In a radial cross section of the set screw 200, the cross section of the external thread of the set screw 200 is L-shaped, and the cross section includes an extension section 300 and a hooking and locking section 400, the hooking and locking section 400 is connected with the body of the set screw 200 through the extension section 300, and the extension direction of the hooking and locking section 400 is opposite to the screwing direction of the set screw 200.
Wherein, two opposite guide grooves 101 are arranged on the side wall of the nail seat barrel 100, the guide grooves 101 extend along the axial direction of the nail seat barrel 100 and are used for placing the connecting rod 500 of the vertebra fixing system along the direction vertical to the axial direction of the nail seat barrel 100. The set screw 200 is driven to move in the magazine cylinder 100, and the set screw 200 can push the connecting rod 500 to move in the axial direction of the magazine cylinder 100.
The working principle and the operation method of the fastening nail seat are as follows:
the set screw 200 with the external thread as the hook lock thread is screwed into the nail seat barrel 100 with the internal thread as the hook lock thread, compared with the traditional conventional thread and negative angle thread, the set screw 200 and the nail seat barrel 100 can achieve the interlocking effect, and can realize good locking and anti-loosening purposes.
Second embodiment:
FIG. 4 is a schematic view of the internal structure of a fastening nail seat according to a second embodiment of the present invention; fig. 5 is a partially enlarged view of B in fig. 4. Referring to fig. 4 and 5, the present embodiment provides a fastening nail seat, which is substantially the same as the fastening nail seat of the first embodiment, and the difference between the fastening nail seat and the fastening nail seat is that the extension 300 of the fastening nail seat of the present embodiment is inclined toward the withdrawing direction of the set screw 200.
In this embodiment, the extension 300 is similar to the extended state of the negative angle thread, but the end of the extension 300 in the hook lock thread is not a sharp end, but is connected to the hook lock section 400. At this time, the connecting rod 500 is positioned in front of the set screw 200, and the closer the set screw 200 is pressed against the connecting rod 500, the greater the reaction force of the connecting rod 500 against the set screw 200 becomes (since the extending direction of the hook lock section 400 is opposite to the screwing direction of the set screw 200) the greater the embracing force of the hook lock thread against the body of the set screw 200 becomes, and the stronger the locking and retaining ability of the set screw 200 in the fastening nail seat becomes.
The third embodiment:
fig. 6 is a schematic view of the internal structure of a fastening nail seat according to a third embodiment of the invention. Referring to fig. 6, the present embodiment provides a fastening nail seat, which is substantially the same as the fastening nail seat of the first embodiment or the second embodiment, and the difference between the fastening nail seat is that the nail seat barrel 100 of the fastening nail seat of the present embodiment is provided with a ring-shaped lead-in groove 102; the annular lead-in groove 102 is arranged on the end face of the nail seat barrel 100, which is placed into the set screw 200, and is coaxial with the nail seat barrel 100; the diameter of the annular lead-in groove 102 is equal to the diameter of the external thread of the set screw 200.
The annular lead-in groove 102 is beneficial to smoothly putting the set screw 200 into the inner cavity of the nail seat barrel 100, so that the situations of thread slipping, tooth staggering and the like when the set screw 200 is screwed in are avoided, and the probability of damage to the set screw 200 in the operation is reduced.
The fourth embodiment:
fig. 7 is a schematic view of the internal structure of a fastening nail seat according to a fourth embodiment of the invention. Referring to fig. 7, the present embodiment provides a fastening nail seat, which is substantially the same as the fastening nail seat of the first, second or third embodiment, and the difference between them is that the fastening screw 200 in the fastening nail seat of the present embodiment is provided with a first annular groove 201; the first annular groove 201 is formed around the outer side of the set screw 200.
Wherein the external thread of the set screw 200 is disposed between the front end of the set screw 200 and the first ring groove 201.
In this embodiment, the first annular groove 201 is provided to reduce the cross-sectional area of the set screw 200 at the first annular groove 201, thereby reducing the loadable shear force at that position. When the depth of first annular groove 201 is reasonable in design, screwing in set screw 200 hard will make set screw 200 break at first annular groove 201, prevent that excessive pressure connective bar 500 from and having damaged the structure of hook lock screw thread. After the set screw 200 is broken, only the thread between the front end of the set screw 200 and the first annular groove 201 bears the effect of the threaded connection, so that no thread may be provided on the other outer side wall of the set screw 200. Also, since the broken portion of the set screw 200 is not threaded, it can be easily removed from the magazine cartridge 100.
Fifth embodiment:
fig. 8 is a schematic view of the internal structure of a fastening nail seat according to a fifth embodiment of the invention. Referring to fig. 8, the present embodiment provides a fastening nail seat, which is substantially the same as the fastening nail seat of the first, second, third or fourth embodiment, and the difference between them is that the nail seat barrel 100 of the fastening nail seat of the present embodiment is provided with a second ring groove 103; the second ring groove 103 is disposed around the outside of the cartridge 100.
In this embodiment, the second ring groove 103 functions similarly to the first ring groove 201, and when the cartridge case 100 is too long, an excess portion can be removed by screwing the cartridge case 100.
Sixth embodiment:
fig. 9 is a schematic perspective view of a nail rod locking device according to a sixth embodiment of the invention. Referring to fig. 9, the present embodiment provides a rod-driving locking device, which includes a connecting rod 500, a plurality of pedicle screws 600, and a plurality of fastening nail seats according to any of the above embodiments, wherein the connecting rod 500 passes through the plurality of nail seat cylinders 100 through the guide slot 101, and the pedicle screws 600 are embedded in the nail seat cylinders 100; the set screw 200, the connecting rod 500 and the pedicle screw 600 are sequentially disposed in the magazine cylinder 100.
The pedicle screw 600 is connected with the screw seat cylinder 100 through the head of the pedicle screw 600, and the axis of the pedicle screw 600 can coincide with the axis of the screw seat cylinder 100 or intersect with the axis of the screw seat cylinder 100 at an inclined angle.
In this embodiment, the through hole for installing the pedicle screw 600 is a universal through hole, so that the pedicle screw 600 can be placed into a bone in a larger angle range, and the installation space requirement of the nail-rod locking device in the operation is met.
Seventh embodiment:
fig. 10 is a perspective view of a vertebral fixation system according to a seventh embodiment of the present invention. Referring to fig. 10, the present embodiment provides a spinal fixation system, which includes a cross-bar 700 and at least two of the above-mentioned nail rod locking devices, wherein one end of the cross-bar 700 is connected to one connecting rod 500, and the other end of the cross-bar 700 is connected to another connecting rod 500.
Wherein the length of the cross link 700 can be adjusted.
Alternatively, the cross link 700 may be a telescopic structure in which a straight rod and a sleeve are sleeved, or one end of the cross link 700 is fixedly disposed on one connecting rod 500, and the other end is screwed with the opposite connecting rod 500.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fastening nail holder, characterized by comprising a nail holder barrel (100) and a set screw (200); the set screw (200) and the nail seat barrel (100) are coaxially arranged, and the set screw (200) is arranged in the nail seat barrel (100);
the set screw (200) is in threaded connection with the nail seat barrel (100) through hook-lock threads; in a radial section of the set screw (200), the section of the external thread of the set screw (200) is L-shaped, the section comprises an extension section (300) and a hook locking section (400), the hook locking section (400) is connected with the body of the set screw (200) through the extension section (300), and the extension direction of the hook locking section (400) is opposite to the screwing direction of the set screw (200);
the side wall of the nail seat barrel (100) is provided with two opposite guide grooves (101), the guide grooves (101) extend along the axial direction of the nail seat barrel (100) and are used for being placed into a connecting rod (500) of a vertebral fixing system along the direction perpendicular to the axial direction of the nail seat barrel (100);
driving the set screw (200) to move in the cartridge barrel (100), the set screw (200) being capable of pushing the connecting rod (500) to move along the axial direction of the cartridge barrel (100).
2. The fastener receptacle according to claim 1, characterized in that the extension (300) is inclined to the withdrawal direction of the set screw (200).
3. A fastening cartridge as claimed in claim 1, characterized in that the cartridge barrel (100) is provided with an annular lead-in groove (102); the annular lead-in groove (102) is arranged on the end face of the nail seat barrel (100) which is placed into the set screw (200) and is coaxial with the nail seat barrel (100); the diameter of the annular lead-in groove (102) is equal to the diameter of the external thread of the set screw (200).
4. A fastening nail holder according to claim 1, characterized in that the set screw (200) is provided with a first annular groove (201); the first ring groove (201) is wound on the outer side of the set screw (200).
5. A fastening shoe according to claim 4, characterised in that the external thread of the set screw (200) is arranged between the front end of the set screw (200) and the first annular groove (201).
6. A fastening nail holder according to claim 1, characterized in that the nail holder cartridge (100) is provided with a second ring groove (103); the second ring groove (103) is wound on the outer side of the nail seat barrel (100).
7. A rod locking device, comprising a connecting rod (500), a plurality of pedicle screws (600) and a plurality of fastening nail seats according to any one of claims 1 to 6, wherein the connecting rod (500) penetrates through a plurality of nail seat cylinders (100) through the guide grooves (101), and the pedicle screws (600) are embedded in the nail seat cylinders (100); the set screw (200), the connecting rod (500) and the pedicle screw (600) are sequentially arranged in the screw seat cylinder (100).
8. The rod and nail locking device according to claim 7, characterized in that the pedicle screw (600) is connected with the saddle cylinder (100) through its head, and the axis of the pedicle screw (600) can coincide with the axis of the saddle cylinder (100) or intersect at an oblique angle.
9. A spinal fixation system comprising a cross-bar (700) and at least two rod locking devices according to claim 7 or 8, one end of the cross-bar (700) being connected to one of the connecting rods (500) and the other end of the cross-bar (700) being connected to the other connecting rod (500).
10. The spinal fixation system according to claim 9, characterized in that the length of the cross-link (700) is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010593909.8A CN111658108A (en) | 2020-06-23 | 2020-06-23 | Fastening nail seat, nail rod locking device and spine fixing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010593909.8A CN111658108A (en) | 2020-06-23 | 2020-06-23 | Fastening nail seat, nail rod locking device and spine fixing system |
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| Publication Number | Publication Date |
|---|---|
| CN111658108A true CN111658108A (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010593909.8A Pending CN111658108A (en) | 2020-06-23 | 2020-06-23 | Fastening nail seat, nail rod locking device and spine fixing system |
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| CN (1) | CN111658108A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502439A (en) * | 2009-03-10 | 2009-08-12 | 李明 | Vertebral pedicle screw with locking screw thread on tail section |
| CN201445552U (en) * | 2009-07-14 | 2010-05-05 | 常州市康辉医疗器械有限公司 | Dynamic spine internal fixation system |
| CN203074843U (en) * | 2012-11-14 | 2013-07-24 | 天津市威曼生物材料有限公司 | Anti-wire-retreating pedicle screw |
| CN106551721A (en) * | 2015-09-30 | 2017-04-05 | 上海三友医疗器械股份有限公司 | Transverse shift nail tail, laterally adjustable section spinal bone screw and method for implantation |
| CN209107551U (en) * | 2018-07-30 | 2019-07-16 | 山东康盛医疗器械有限公司 | Hook lock screw fixing device |
| CN212326540U (en) * | 2020-06-23 | 2021-01-12 | 北京科仪邦恩医疗器械科技有限公司 | Fastening nail seat, nail rod locking device and spine fixing system |
-
2020
- 2020-06-23 CN CN202010593909.8A patent/CN111658108A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502439A (en) * | 2009-03-10 | 2009-08-12 | 李明 | Vertebral pedicle screw with locking screw thread on tail section |
| CN201445552U (en) * | 2009-07-14 | 2010-05-05 | 常州市康辉医疗器械有限公司 | Dynamic spine internal fixation system |
| CN203074843U (en) * | 2012-11-14 | 2013-07-24 | 天津市威曼生物材料有限公司 | Anti-wire-retreating pedicle screw |
| CN106551721A (en) * | 2015-09-30 | 2017-04-05 | 上海三友医疗器械股份有限公司 | Transverse shift nail tail, laterally adjustable section spinal bone screw and method for implantation |
| CN209107551U (en) * | 2018-07-30 | 2019-07-16 | 山东康盛医疗器械有限公司 | Hook lock screw fixing device |
| CN212326540U (en) * | 2020-06-23 | 2021-01-12 | 北京科仪邦恩医疗器械科技有限公司 | Fastening nail seat, nail rod locking device and spine fixing system |
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