CN110432964A - A kind of middle section Retchet gear type pedicle screw - Google Patents
A kind of middle section Retchet gear type pedicle screw Download PDFInfo
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- CN110432964A CN110432964A CN201910814942.6A CN201910814942A CN110432964A CN 110432964 A CN110432964 A CN 110432964A CN 201910814942 A CN201910814942 A CN 201910814942A CN 110432964 A CN110432964 A CN 110432964A
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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
- A61B17/683—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
- A61B17/70—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
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
-
- 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
- A61B17/7044—Screws or hooks combined with longitudinal elements which do not contact vertebrae also having plates, staples or washers bearing on the vertebrae
-
- 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
-
- 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
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
-
- 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
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Neurology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a kind of middle section Retchet gear type pedicle screws, including being equipped with externally threaded screw and being connected to the U-shaped head of a nail of screw lower end, it is coaxially provided in screw from screw lower end and is faced upward the threaded hole that extreme direction extends, spiral shell dress can screw in or screw out the inner screw of threaded hole in threaded hole；The hinge that annular is equipped with the multiple perforation on the outside of screw to threaded holes on the screw nail wall of threaded hole hole section fills hole, the ratchet that can be shown screw outside a part or swing in screw is hinged in hinge dress hole, ratchet is ejected by the inner screw for screwing in threaded hole to a part on the outside of hinge dress hole, and the ratchet shown on the outside of screw can be pressed into screw by screw again from when screwing out in sclerotin by the extruding force of sclerotin.The vertebral pedicle bolt structure is simple, and intensity is high, can improve the contact area and expansive force of pedicle screw and sclerotin, to improve the installation strength of pedicle screw, realizes that pedicle screw is dismantled from sclerotin secondly, can facilitate.
Description
Technical field
The present invention relates to a kind of middle section Retchet gear type pedicle screws.
Background technique
Pedicle screw is medical instrument most-often used in spinal operation, for treating tumor of spine, spinal trauma, ridge
Column regression and deformity of spine are most important；Pedicle screw be existing pedicle screw generally include solid construction screw and
It is connected to the U-shaped head of a nail of screw tail portion, the U-shaped head of a nail can be fixedly connected with or be connected to by flexural pivot chain structure the tail of screw
Portion, the U-shaped head of a nail are used to be connected and fixed stick, therefore, can be fixedly connected more pedicle screws by hold-down bars, therefore,
Realize that two or more segment centrums are fixed；Clinician wishes that implantation pedicle screw is strong, and screw is longer, and screw is straight
The pedicle screw of the thicker implantation of diameter is stronger, but is limited by centrum length and pedicle of vertebral arch thickness, the pedicle screw of implantation
Often can not be longer or thicker, strength provided by common pedicle screw can substantially meet the good young and middle-aged trouble of sclerotin
Person, which performs the operation, to be needed, but for old people with osteoporosis, common pedicle screw often will appear screw loosening or extraction
The phenomenon that, this can directly contribute operative failure, have several pedicle screws for sufferers of osteoporosis face at present, such as bone cement nail and
Tail swell fixture etc. is followed closely, but above-mentioned screw is once implanted into human body and can not often take out；In consideration of it, can be with it is necessary to invent one kind
The stronger and pedicle screw that can take out in limited size.
Summary of the invention
It is easy to use the technical problem to be solved in the present invention is to provide a kind of structure is simple, can improve pedicle screw with
The contact area of sclerotin increases the holding power and resistance to plucking output capacity of screw, and it is enterprising from sclerotin to can be realized pedicle screw
The middle section Retchet gear type pedicle screw of row disassembly.
In order to solve the above technical problems, the present invention includes being equipped with externally threaded screw and being connected to the U-shaped of screw lower end
The head of a nail is structurally characterized in that: be coaxially provided in the screw from screw lower end face upward extreme direction extend threaded hole, the spiral shell
Spiral shell dress can screw in or screw out the inner screw of threaded hole in pit；Annular is equipped with multiple on the screw nail wall of threaded hole hole section
The hinge of perforation to threaded hole fills hole on the outside of from screw, and a part on the outside of screw can be shown or swing in by being hinged in hinge dress hole
Ratchet in screw, the ratchet are ejected by the inner screw for screwing in threaded hole to a part on the outside of hinge dress hole, the spiral shell
Following closely can be pressed into the ratchet shown on the outside of screw in screw by the extruding force of sclerotin from when screwing out in sclerotin again, then realize
The taking-up of screw.
After adopting the above structure, when needing to screw in pedicle screw in sclerotin, first ratchet is resetted and is filled in hole in hinge,
Meanwhile separate inner screw with pedicle screw, secondly, pedicle screw is screwed in sclerotin to set depth, later,
Inner screw is screwed in threaded hole, inner screw is during precession by the inside portion for pushing ratchet to which ratchet is ejected hinge dress hole
A part increases the holding of screw at this point, the ratchet stretched out on the outside of hinge dress hole improves the contact area of the present invention with sclerotin
Therefore power reduces the present invention because of failure risk caused by loosening, then increases the installation strength of pedicle screw；Meanwhile this
After invention is mounted on patient's body, due to being installed with inner screw in threaded hole, the structural strength of hollow screw can be improved；
In addition, inner screw can be screwed off from pedicle screw, when needing to remove the present invention from patient's body at this point, ratchet lacks
The limit pressure of inner screw, therefore, during the back-out of pedicle screw, ratchet can be pressed into again hinge dress hole by sclerotin
It is interior, the slave patient's body of pedicle screw safety is removed to facilitate.
In order to realize that the hinge assembling structure of ratchet, the ratchet are filled in hole by lower end hinge mounted in hinge, the hinge of the ratchet
The axis of dress axis and screw is vertically arranged.
Further, the main hinge that the nail wall of the screw is equipped with the nail wall of perforation hinge dress hole two sides fills hole, the ratchet
Lower end be equipped with the secondary hinge dress hole with the hole coaxial arrangement of main hinge dress, the ratchet is relied on across main hinge dress hole and secondary hinge dress hole
Hinged shaft is mounted in hinge dress hole.
In order to realize the structure of ratchet, the ratchet includes the hinge dress end and thickness roughly the same with screw roof thickness
The swing end being gradually increased upwards；The swing end includes the outer toothed portion that can be shown on the outside of screw and can not show spiral shell always
The interior teeth portion in outside is followed closely, the inner screw screwed in threaded hole can push interior teeth portion to eject outer toothed portion to screw；Institute
It states after ratchet swings in screw, the interior teeth portion of ratchet stretches in threaded hole.
In order to avoid ratchet is arbitrarily swung, it is equipped with ratchet flexible fastening in screw between the ratchet and hinge dress hole
Position-limit mechanism.
The position-limit mechanism includes that the left side or the limit shrinkage pool on right side that hinge fills hole is arranged in, the ratchet
Respective side is equipped with limit salient point, and the limit salient point can be caught in limit shrinkage pool after ratchet is swung in screw.
In order to realize that ratchet during back-out, can be resetted automatically and be filled in hole in hinge by pedicle screw, the screw
When external screw thread is right-handed thread, the left side of outer toothed portion is inclined surface, the distance of the left side of the inclined surface to screw axis
Less than the distance of right edge to screw axis.
In order to realize that ratchet during back-out, can be resetted automatically and be filled in hole in hinge by pedicle screw, the screw
When external screw thread is left hand thread, the right side of outer toothed portion is inclined surface, the distance of the right edge of the inclined surface to screw axis
Less than the distance of left side to screw axis.
In order to slowly eject ratchet on the outside of hinge dress hole, the upper end of the inner screw is tapered end.
In order to realize the structure of screw, the screw includes the lower end rivet nut section and reality of the hollow structure equipped with threaded hole
The head rivet nut section of core structure.
In conclusion the configuration of the present invention is simple, intensity is high, easy to use, can improve contact of the pedicle screw with sclerotin
Area realizes that pedicle screw is dismantled from sclerotin secondly, can facilitate to improve the installation strength of pedicle screw.
Detailed description of the invention
Invention is further described in detail with reference to the accompanying drawings and detailed description:
Fig. 1 is the schematic perspective view when ratchet in the present invention is shown；
Fig. 2 is the partial enlargement diagram in the region C in Fig. 1；
Fig. 3 is the schematic perspective view that the ratchet in the present invention is swung in in screw；
Fig. 4 is the partial enlargement diagram of B area in Fig. 3；
Fig. 5 is the schematic perspective view of ratchet；
Fig. 6 is the schematic perspective view of another angle of ratchet；
Fig. 7 is the section view schematic view of the front view of Fig. 1；
Fig. 8 is the section view schematic view of the front view of Fig. 3；
Fig. 9 is the partial enlargement diagram of a-quadrant in Fig. 8；
Figure 10 is the partial enlargement diagram after inner screw ejects ratchet.
Specific embodiment
Referring to attached drawing, which includes being equipped with externally threaded screw 1 and being connected to 1 lower end of screw
The connection type of the U-shaped head of a nail 2 in portion, the U-shaped head of a nail 2 and screw 1 has the same structure as in the prior art, and the connection type is usual
To be fixedly connected with or passing through two kinds of flexural pivot chain link, attached drawing of the invention shows the connection type of fixed connection structure, this
The invention of invention focuses on the improvement of 1 part of screw.
With continued reference to attached drawing, be coaxially provided in the screw 1 from 1 lower end of screw face upward extreme direction extend threaded hole 3, should
Threaded hole 3 is counterbore, and the length of the threaded hole 3 accounts for 3/4 or so of 1 length of screw, and therefore, which includes being equipped with threaded hole 3
Hollow structure lower end rivet nut section 11 and solid construction head rivet nut section 10, certainly, which can also coaxially pass through
Logical screw 1, to make hollow rivet nut of the screw 1 as an entirety；In addition, spiral shell dress can be screwed in or be screwed out in the threaded hole 3
The inner screw 4 of threaded hole 3, the lower end of inner screw 4 are equipped with the nut end for conveniently screwing inner screw 4.
As shown in Fig. 1-Figure 10, annular is passed through on the outside of screw 1 equipped with multiple on the nail wall of screw 1 of 3 hole section of threaded hole
The hinge dress hole of threaded hole 3 is passed to, the hinge dress hole in the present invention is preferably three, meanwhile, each hinge dress is hinged with and can show in hole
The outside of screw 1 a part swings in ratchet 5 in screw 1, as shown in fig. 7, the ratchet 5 can be by the interior of screw-in threaded hole 3
Screw rod 4 is ejected to a part on the outside of hinge dress hole, in addition, screw 1 can rely on the extruding force of sclerotin will when screwing out from sclerotin
The ratchet 5 for showing 1 outside of screw is pressed into screw 1 again；And in order to realize the hinge assembling structure of ratchet 5, which passes through lower end
Portion's hinge is in hinge dress hole, likewise it is preferred that the axis of hinge the dress axis and screw 1 of ratchet 5 is vertically arranged, such as Fig. 2 and Fig. 9 institute
Show, the main hinge that the nail wall of screw 1 is equipped with the nail wall of perforation hinge dress hole two sides fills hole, and hinge dress hole can pass through wire cutting or brill
The mode of cutting processes acquisition, in addition, the lower end of ratchet 5 is equipped with the secondary hinge dress hole 7 with the hole coaxial arrangement of main hinge dress, therefore, ratchet 5
It is to be mounted in hinge dress hole by across the hinged shaft 6 in main hinge dress hole and secondary hinge dress hole 7.In order to facilitate description ratchet 5 structure, with
Structure description is carried out for the ratchet 5 of 1 front side of screw, which includes the hinge dress roughly the same with 1 roof thickness of screw
The swing end that end and front and back thickness are gradually increased upwards, as shown in Figure 10, the section configuration of ratchet 5 in the lateral direction
Substantially fan-shaped face, in addition, the hole body size of the upper-lower height of ratchet 5 and left and right width preferably with hinge dress hole matches；In addition,
Swinging end includes that can show the outer toothed portion 12 in 1 outside of screw and can not show the interior teeth portion 13 on the outside of screw 1 always, therefore,
The inner screw 4 screwed in threaded hole 3 can push interior teeth portion 13 to eject outer toothed portion 12 to 1 outside of screw；And ratchet 5 is swung in
After in screw 1, the interior teeth portion 13 of ratchet 5 will be stretched in threaded hole 3.In addition, the extension after ratchet 5 is shown is preferably greater than
The external screw thread height of screw 1；Secondly, processing hinge fills hole and installation ratchet 5 on screw 1 for convenience, as Figure 1-Figure 4,
It can make with the smooth axial plane of 1 outer peripheral surface of screw at hinge dress hole, the outer diameter of the smooth axial plane and the external screw thread path of screw 1
It is consistent, it is of course also possible to making to be also provided with external screw thread with 1 outer peripheral surface of screw at hinge dress hole.
In order to avoid ratchet 5 from showing during the present invention is screwed in sclerotin, it is equipped between ratchet 5 and hinge dress hole
By position-limit mechanism of 5 flexible fastening of ratchet in screw 1, as shown in Fig. 2, the position-limit mechanism includes the left side that hinge dress hole is arranged in
Limit shrinkage pool on face or right side, meanwhile, the corresponding left side of ratchet 5 or right side are equipped with limit salient point 8, limit
Salient point 8 can be caught in limit shrinkage pool after ratchet 5 is swung in screw 1；It is of course also possible to which limit is arranged in the upper side in ratchet 5
Salient point 8, the setting limit shrinkage pool on the upper hole wall in hinge dress hole；Secondly, matching between ratchet 5 and hinge dress hole can also be reasonably adjusted
Gap is closed, for example, by using transition fit, then makes ratchet 5 when swinging in or showing hinge dress hole, there is certain swing resistance,
To avoid ratchet 5 from arbitrarily swinging.
In addition, figure as shown in 2- Fig. 6, in order to realize pedicle screw during back-out, can automatically by ratchet 5 reset in
Hinge dress hole in, when the external screw thread of screw 1 be right-handed thread when, the left side of the outer toothed portion 12 or left-hand corner portion be arranged one
A inclined surface 9, the left side of the inclined surface 9 are less than the distance of right edge to 1 axis of screw to the distance of 1 axis of screw, therefore,
During screw 1 screws out, sclerotin can oppress the inclined surface 9, so that ratchet 5 is pressed into hinge dress hole.Certainly, if screw 1
External screw thread when being left hand thread, then need right side in outer toothed portion 12 or the setting of the right side corner in outer toothed portion 12 one
A inclined surface 9, the right edge of the inclined surface 9 are less than the distance of left side to 1 axis of screw to the distance of 1 axis of screw.Certainly,
In order to which by the outside of ratchet 5 slowly ejection hinge dress hole, the upper end of inner screw 4 is preferably tapered end, likewise it is preferred that inner screw 4
Length it is consistent with the length of threaded hole 3.
In conclusion the present invention is not limited to above-mentioned specific embodiments.Those skilled in the art, it is of the invention not departing from
Under the premise of spirit and scope, several change and modification can be done, all these variations should all fall into protection scope of the present invention.
Claims (10)
1. a kind of middle section Retchet gear type pedicle screw, including being equipped with externally threaded screw (1) and being connected to screw (1) lower end
The U-shaped head of a nail (2), it is characterised in that: be coaxially provided in the screw (1) from screw (1) lower end face upward extreme direction extend spiral shell
Pit (3), spiral shell dress can screw in or screw out the inner screw (4) of threaded hole (3) in the threaded hole (3)；Positioned at threaded hole (3) hole
The hinge that annular is equipped with the multiple perforation on the outside of screw (1) to threaded holes (3) on screw (1) the nail wall of section fills hole, and the hinge fills hole
In be hinged with the ratchet (5) that can be shown a part on the outside of screw (1) or swing in screw (1), the ratchet (5) is by screwing in
The inner screw (4) of threaded hole (3) is ejected to a part on the outside of hinge dress hole, and the screw (1) screws out Shi Keyi from sclerotin
The ratchet (5) on the outside of screw (1) will be shown by the extruding force of sclerotin to be pressed into again in screw (1).
2. Retchet gear type pedicle screw in middle section as described in claim 1, it is characterised in that: the ratchet (5) passes through lower end
In hinge dress hole, the axis of hinge the dress axis and screw (1) of the ratchet (5) is vertically arranged hinge.
3. Retchet gear type pedicle screw in middle section as claimed in claim 2, it is characterised in that: set on the nail wall of the screw (1)
There is the main hinge dress hole of the nail wall of perforation hinge dress hole two sides, the lower end of the ratchet (5) is equipped with and the hole coaxial arrangement of main hinge dress
Pair hinge dress hole (7), the ratchet (5) are mounted in hinge dress hole by across the hinged shaft (6) in main hinge dress hole and secondary hinge dress hole (7).
4. Retchet gear type pedicle screw in middle section as described in claim 1, it is characterised in that: the ratchet (5) includes and screw
(1) the swing end that the roughly the same hinge dress end of roof thickness and thickness are gradually increased upwards；The swing end includes energy
It shows the outer toothed portion (12) on the outside of screw (1) and the interior teeth portion (13) on the outside of screw (1) can not be shown always, screw in threaded hole
(3) inner screw (4) in can push interior teeth portion (13) to eject outer toothed portion (12) to screw (1)；The ratchet (5)
After swinging in screw (1), the interior teeth portion (13) of ratchet (5) is stretched in threaded hole (3).
5. Retchet gear type pedicle screw in middle section as claimed in claim 2, it is characterised in that: the ratchet (5) and hinge dress hole it
Between be equipped with position-limit mechanism by ratchet (5) flexible fastening in screw (1).
6. Retchet gear type pedicle screw in middle section as described in claim 1, it is characterised in that: the position-limit mechanism includes that setting exists
The left side in hinge dress hole or the limit shrinkage pool on right side, the respective side of the ratchet (5) are equipped with limit salient point (8),
The limit salient point (8) can be caught in limit shrinkage pool after ratchet (5) is swung in screw (1).
7. Retchet gear type pedicle screw in middle section as claimed in claim 4, it is characterised in that: the external screw thread of the screw (1) is
When right-handed thread, the left side of outer toothed portion (12) is inclined surface (9), the left side of the inclined surface (9) to screw (1) axis
Distance is less than the distance of right edge to screw (1) axis.
8. Retchet gear type pedicle screw in middle section as claimed in claim 4, it is characterised in that: the external screw thread of the screw (1) is
When left hand thread, the right side of outer toothed portion (12) is inclined surface (9), the right edge of the inclined surface (9) to screw (1) axis
Distance is less than the distance of left side to screw (1) axis.
9. Retchet gear type pedicle screw in middle section as described in claim 1, it is characterised in that: the upper end of the inner screw (4)
For tapered end.
10. Retchet gear type pedicle screw in middle section as described in claim 1, it is characterised in that: the screw (1) includes being equipped with spiral shell
The lower end rivet nut section (11) of the hollow structure of pit (3) and the head rivet nut section (10) of solid construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910814942.6A CN110432964A (en) | 2019-08-30 | 2019-08-30 | A kind of middle section Retchet gear type pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910814942.6A CN110432964A (en) | 2019-08-30 | 2019-08-30 | A kind of middle section Retchet gear type pedicle screw |
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| Publication Number | Publication Date |
|---|---|
| CN110432964A true CN110432964A (en) | 2019-11-12 |
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ID=68438561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910814942.6A Withdrawn CN110432964A (en) | 2019-08-30 | 2019-08-30 | A kind of middle section Retchet gear type pedicle screw |
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| Country | Link |
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| CN (1) | CN110432964A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108498155A (en) * | 2018-04-26 | 2018-09-07 | 重庆医科大学附属永川医院 | A kind of anti-rotation pedicle screw of self-locking and its application method |
| CN111437023A (en) * | 2020-03-16 | 2020-07-24 | 中国人民解放军联勤保障部队第九二〇医院 | Novel expansion type pedicle screw and revision fixing method |
| CN117257429A (en) * | 2023-11-21 | 2023-12-22 | 苏州爱得科技发展股份有限公司 | pedicle screw |
-
2019
- 2019-08-30 CN CN201910814942.6A patent/CN110432964A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108498155A (en) * | 2018-04-26 | 2018-09-07 | 重庆医科大学附属永川医院 | A kind of anti-rotation pedicle screw of self-locking and its application method |
| CN111437023A (en) * | 2020-03-16 | 2020-07-24 | 中国人民解放军联勤保障部队第九二〇医院 | Novel expansion type pedicle screw and revision fixing method |
| CN111437023B (en) * | 2020-03-16 | 2021-03-26 | 中国人民解放军联勤保障部队第九二〇医院 | Expansion type pedicle screw and revision fixing method |
| CN117257429A (en) * | 2023-11-21 | 2023-12-22 | 苏州爱得科技发展股份有限公司 | pedicle screw |
| CN117257429B (en) * | 2023-11-21 | 2024-01-30 | 苏州爱得科技发展股份有限公司 | Pedicle screw |
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Application publication date: 20191112 |