CN116172678A - Pedicle screw and screw connection assembly - Google Patents
Pedicle screw and screw connection assembly Download PDFInfo
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- CN116172678A CN116172678A CN202310153000.4A CN202310153000A CN116172678A CN 116172678 A CN116172678 A CN 116172678A CN 202310153000 A CN202310153000 A CN 202310153000A CN 116172678 A CN116172678 A CN 116172678A
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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
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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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
- A61B17/7083—Tools for guidance or insertion of tethers, rod-to-anchor connectors, rod-to-rod connectors, or longitudinal elements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/8615—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the central region of the screw head
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
- A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
- A61B17/862—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the periphery of the screw head
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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
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
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Abstract
The invention provides a pedicle screw and screw connection assembly, comprising: the top of the nail seat is provided with an installation groove; the nail seat comprises a seat body and a nail arm, wherein the nail arm comprises two oppositely arranged arm parts which are respectively positioned at two sides of the mounting groove; each arm is arc-shaped; an arc-shaped boss which is bent inwards is arranged on the outer side surface of the lower part of each arm part; the edges of two sides of each arm part are respectively provided with a notch groove, the notch grooves extend to the top surface of the arm part, and the notch grooves are positioned above the arc-shaped bosses; the outer side surface of the arm part is provided with a clamping hole; the bottom of the screw seat is connected with the screw rod, and the screw rod is provided with an axial through hole. After the pedicle screw disclosed by the invention is assembled with the connecting sheet, the outer side contour of the connecting sheet is not larger than the outer side contour of the pedicle screw, so that the skin incision in the minimally invasive spine surgery can be only the largest size of the outer side surface of the pedicle screw required to pass through, and the trauma in the surgery can be reduced to the greatest extent.
Description
The scheme is divided application of the following patent applications:
application number: 202010340424.8;
filing date: 04 month 26 days 2020;
the invention name is as follows: pedicle screw and screw connection assembly
Technical Field
The invention relates to the technical field of posterior spinal fixation devices, in particular to a pedicle screw and a screw connection assembly.
Background
Minimally invasive spinal surgery is a surgical concept for achieving the optimal surgical effect with minimal invasion and minimal physiological interference on the premise of not affecting the curative effect, and is mainly characterized by minimally invasive human body compared with the conventional surgical operation. Because accidental wounds have great harm to human bodies and are difficult to avoid, surgical operations are planned wounds, and operators need to minimize the surgical wounds, namely the purpose of minimally invasive. Compared with the open spinal surgery, the minimally invasive spinal surgery technology has the main purpose of treating spinal diseases through various minimally invasive means, and can reduce surgical wounds of patients to the greatest extent, promote early rehabilitation of the patients and reduce postoperative sequelae while achieving the same or better curative effect as the open spinal surgery.
The pedicle screws used in the existing spine minimally invasive surgery mainly comprise two structures, namely, a first structure: the hollow screw connected by the rigid extension arm has a circumferential volume which is much larger than that of the screw, and the tissue traction of skin incision, muscle and the like in operation is necessarily larger than the outer diameter of the screw; second kind: the hollow screw connected by the flexible extension piece can not be operated by pressing a rod and the like in the flexible extension piece, and the skin incision is also much larger than the outer diameter of the screw in order to pass the instrument outside the screw.
How to design a skin incision to be just the size of the screw passed through, so that the trauma in the operation can be reduced to the greatest extent, is a problem that the person skilled in the art needs to solve.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention solves the technical problem of providing a pedicle screw and screw connection assembly.
To achieve the above and other related objects, the present invention provides a pedicle screw comprising:
the nail seat is provided with a mounting groove at the top, the mounting groove is recessed downwards from the top of the nail seat and penetrates through the nail seat in the radial direction, and the inner side surface of the mounting groove is provided with a locking thread part; the nail seat comprises a seat body and a nail arm arranged at the upper end of the seat body, wherein the nail arm comprises two oppositely arranged arm parts which are respectively positioned at two sides of the mounting groove; each arm is arc-shaped; an arc-shaped boss which is bent inwards is arranged on the outer side surface of the lower part of each arm part;
the two side edges of each arm part are respectively provided with a notch groove, the notch grooves extend to the top surface of the arm part, and the notch grooves are positioned above the arc-shaped bosses; the outer side surface of the arm part is provided with a clamping hole;
the bottom of the screw seat is connected with the screw rod, and the screw rod is provided with an axial through hole.
Preferably, the groove wall surface of the notch groove is inclined with respect to the radial direction of the arm portion.
Preferably, a guiding concave part is arranged at the top of the inner side surface of the mounting groove, the guiding concave part is arranged along the circumferential direction of the inner side surface of the mounting groove, and the locking threaded part is positioned below the guiding concave part.
Preferably, the outer side surface of the lower end of the screw rod is provided with two opposite cutting grooves, and the cutting grooves are communicated with the axial through hole.
Preferably, a ball socket is arranged in the nail seat, the head of the screw rod is a ball head, and the ball head is placed in the ball socket.
As described above, the pedicle screw of the invention has the following beneficial effects:
the nail seat comprises a seat body and a nail arm arranged at the upper end of the seat body, wherein the nail arm comprises two oppositely arranged arm parts which are respectively positioned at two sides of the mounting groove; an arc-shaped boss which is bent inwards is arranged on the outer side surface of the lower part of each arm part; the arc-shaped boss can be used for supporting a connecting sheet connected with the pedicle screw; the clamping holes on the outer side surfaces of the arm parts can be in clamping connection with the connecting sheets; because the pedicle screw can be stably connected with the connecting sheet, and the arc-shaped boss of the pedicle screw provides a space for placing the connecting sheet, after the pedicle screw and the connecting sheet, the outer profile of the connecting sheet is not greater than that of the pedicle screw, and then the skin incision in the minimally invasive spine surgery can be only the largest size of the outer side surface of the pedicle screw required to pass through, so that the trauma in the surgery can be reduced to the greatest extent.
The invention also relates to a screw connection assembly comprising: two connecting pieces and the pedicle screw;
each connecting piece comprises an arc-shaped piece body which is bent inwards, and the radian of the inner side surface of the piece body is equal to that of the outer side surface of the arm part; the radian of the outer side surface of the sheet body is equal to that of the outer side surface of the arc-shaped boss, and the radial thickness of the sheet body is equal to that of the arc-shaped boss; the sheet body is provided with a strip through hole, and the length direction of the strip through hole is in the same direction as the vertical direction of the sheet body; the elastic sheet is arranged in the strip through hole, the upper end of the elastic sheet is connected with the upper end of the strip through hole, and the inner side surface of the lower end of the elastic sheet is provided with a positioning protrusion;
the two opposite edges of the inner side surface of the sheet body are respectively provided with a baffle strip vertically arranged, and the height between the bottom surface of each baffle strip and the bottom surface of the sheet body is equal to the height between the arc-shaped boss and the bottom surface of the notch groove; the two baffle strips and the inner side surface of the sheet body enclose a sheet body clamping groove for the arm to be inserted;
each sheet body is placed on the corresponding arc-shaped boss, the inner side surface of the sheet body is in contact with the outer side surface of the corresponding arm part, and the positioning protrusions are clamped in the clamping holes.
Preferably, a groove wall surface of the notch groove is inclined with respect to a radial direction of the arm portion; opposite side surfaces of the two barrier strips are clamping surfaces, and the clamping surfaces are obliquely arranged relative to the radial direction of the sheet body; when the arm part is inserted into the sheet clamping groove, each clamping surface is contacted with the groove wall surface of the corresponding notch groove.
As described above, the screw connection assembly of the present invention has the following advantageous effects:
the sheet body is bent inwards, and the radian of the inner side surface of the sheet body is equal to that of the outer side surface of the arm part; the radian of the outer side surface of the sheet body is equal to that of the outer side surface of the arc-shaped boss, and the radial thickness of the sheet body is equal to that of the arc-shaped boss; when the sheet body is placed on the arc-shaped boss, the sheet body does not exceed the outer side surface of the arc-shaped boss; namely, after the pedicle screw and the connecting sheet, the outer side contour of the connecting sheet is not larger than the outer side contour of the pedicle screw, and the basic operation is carried out in a channel formed by the two connecting sheets in the operation process, so that the skin incision in the minimally invasive spine operation can be only the largest dimension of the outer side surface of the pedicle screw required to pass through; the sheet body is provided with a strip through hole, the elastic sheet is arranged in the strip through hole, the inner side surface of the lower end of the elastic sheet is provided with a positioning bulge, and the positioning bulge is clamped in the clamping hole, so that the sheet body can be stably connected with the pedicle screw; the height between the bottom surface of each barrier strip and the bottom surface of the sheet body is equal to the height between the arc-shaped boss and the bottom surface of the notch groove, the two barrier strips and the inner side surface of the sheet body enclose the sheet body clamping groove into which the arm part is inserted, the arm part can be inserted into the sheet body clamping groove, and the sheet body clamping groove can limit the radial displacement of the connecting sheet; the notch groove is arranged to limit the axial displacement of the connecting sheet; thereby connecting the connecting sheet and the pedicle screw into a screw connecting assembly, the connecting sheet has the function of a long arm, and the connecting sheet is matched with other instruments to complete minimally invasive surgery, and the operation is simple; the connecting structure of the connecting sheet and the pedicle screw is simple and reliable, so that the operation in the operation is simple, and the operation time is saved; the connecting sheet is detachably connected with the pedicle screw, so the pedicle screw can be reused; the connecting sheet can be installed on the pedicle screw, so that a long extension arm part is not required to be manufactured on the pedicle screw, the processing and material cost of the pedicle screw production can be reduced, and the medical burden is lightened for patients.
Drawings
Fig. 1 shows a schematic side view of a pedicle screw of example 1.
Fig. 2 shows a schematic view in the direction A-A of fig. 1.
Fig. 3 shows a schematic top view of the pedicle screw of example 1.
Fig. 4 shows a schematic view of the bottom structure of the pedicle screw of example 1.
Fig. 5 is a schematic perspective view showing a screw connection assembly of embodiment 1.
Fig. 6 is a schematic view showing the internal perspective structure of the screw connection assembly of embodiment 1.
Fig. 7 shows a schematic upper structure of the connecting piece of the screw connection assembly of embodiment 1.
Fig. 8 is a schematic perspective view showing the structure of the connecting piece of the screw connection assembly of embodiment 1.
Fig. 9 is a schematic side view showing the structure of the screw connection assembly of embodiment 1.
Fig. 10 shows a schematic view in the B-B direction of fig. 9.
Fig. 11 shows a schematic view in the C-C direction of fig. 10.
Fig. 12 is an enlarged schematic view showing the structure of the positioning protrusion of the spring plate of the screw connection assembly of embodiment 1 inserted into the clamping hole.
Fig. 13 shows a schematic side view of the pedicle screw of example 2.
Description of the reference numerals
100. Nail seat
101. Mounting groove
102. Locking screw part
103. Guide recess
104. Ball socket
110. Seat body
120. Arm portion
121. Notch groove
1211. Groove wall surface of notch groove
1212. Groove bottom surface
122. Clamping hole
123. Outer side surface of arm
130. Arc boss
131. Outer side surface of arc boss
200. Screw rod
201. Axial through hole
202. Grooving process
203. Ball head
300. Sheet body
301. Inner side surface of the sheet body
302. Outer side surface of the sheet body
310. Strip through hole
320. Spring plate
330. Positioning protrusion
340. Barrier strip
341. Clamping surface
350. Sheet clamping groove
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Example 1
As shown in fig. 1 to 12, the pedicle screw of the present embodiment includes: comprising the following steps:
the nail seat 100, the top of the nail seat 100 is provided with a mounting groove 101, the mounting groove 101 is recessed downwards from the top of the nail seat 100 and penetrates through the nail seat 100 along the radial direction, and the inner side surface of the mounting groove 101 is provided with a locking thread part 102; the nail seat 100 comprises a seat body 110 and a nail arm arranged at the upper end of the seat body 110, wherein the nail arm comprises two oppositely arranged arm parts 120 which are respectively positioned at two sides of the mounting groove 101; each arm 120 is arc-shaped; an arc-shaped boss 130 bent inward is provided on an outer side surface of a lower portion of each arm portion 120;
the two side edges of each arm 120 are respectively provided with a notch groove 121, the notch grooves 121 extend to the top surface of the arm 120, and the notch grooves 121 are positioned above the arc-shaped bosses 130; the outer side surface 123 of the arm 120 is provided with a clamping hole 122;
the screw rod 200, the bottom of the nail seat 100 is connected with the screw rod 200, and the screw rod 200 is provided with an axial through hole 201.
In the pedicle screw of the invention, the screw seat 100 comprises a seat body 110 and screw arms arranged at the upper end of the seat body 110, wherein the screw arms comprise two oppositely arranged arm parts 120 respectively arranged at two sides of the mounting groove 101; an arc-shaped boss 130 bent inward is provided on an outer side surface of a lower portion of each arm portion 120; the arcuate boss 130 can be used to support a tab for connection with a pedicle screw; the clamping holes 122 on the outer side surface 123 of the arm part 120 can be in clamping connection with the connecting sheets; because the pedicle screw can be stably connected with the connecting sheet, and the arc-shaped boss 130 of the pedicle screw provides a space for placing the connecting sheet, after the pedicle screw and the connecting sheet, the outer profile of the connecting sheet is not larger than that of the pedicle screw, and then the skin incision in the minimally invasive spine surgery can be only the largest size of the outer side surface of the pedicle screw required to pass through, so that the trauma in the surgery can be reduced to the greatest extent.
The groove wall surface 1211 of the notch 121 is inclined with respect to the radial direction of the arm 120. By the structure, when the arm 120 is plugged with the connecting piece, the groove wall 1211 of the notch groove 121 can play a limiting role, so that plug connection is more stable.
The top of the inner side surface of the installation groove 101 is provided with a guide recess 103, the guide recess 103 is provided along the circumferential direction of the inner side surface of the installation groove 101, and the locking screw 102 is located below the guide recess 103. The guiding concave part 103 provides guiding for the locking screw plug in operation, and prevents the screw plug from generating dislocation and sliding wire when being screwed in.
The screw shaft 200 is provided on the outer side of the lower end thereof with two opposing slits 202, the slits 202 communicating with the axial through-hole 201. The provision of the slot 202 enables rapid cutting of the residual bone tissue of the nail path, which makes it easier for the screw shaft 200 to be screwed in and more labor-saving for the doctor to operate.
The invention also relates to a screw connection assembly comprising: two connecting pieces and pedicle screws;
each connecting piece comprises an arc-shaped piece body 300, the piece body 300 is bent inwards, and the radian of the inner side surface 310 of the piece body 300 is equal to the radian of the outer side surface 123 of the arm part 120; the radian of the outer side 302 of the sheet body 300 is equal to the radian of the outer side 131 of the arc-shaped boss 130, and the radial thickness of the sheet body 300 is equal to the radial thickness of the arc-shaped boss 130; the sheet body 300 is provided with a strip through hole 310, and the length direction of the strip through hole 310 is in the same direction as the vertical direction of the sheet body 300; the elastic piece 320 is arranged in the strip through hole 310, the upper end of the elastic piece 320 is connected with the upper end of the strip through hole 310, and the inner side surface of the lower end of the elastic piece 320 is provided with a positioning protrusion 330;
the two opposite edges of the inner side 301 of the sheet body 300 are respectively provided with a baffle strip 340 which is vertically arranged, and the height between the bottom surface of each baffle strip 340 and the bottom surface of the sheet body 300 is equal to the height between the arc-shaped boss 130 and the bottom surface 1212 of the notch groove 121; the two baffle strips 340 and the inner side surface of the sheet body enclose a sheet body clamping groove 350 for the arm 120 to be inserted into;
each tab body 300 is placed on the corresponding arc-shaped boss 130, the inner side surface 310 of the tab body 300 is in contact with the outer side surface 123 of the corresponding arm 120, and the positioning protrusion 330 is snapped into the snap hole 122.
In the screw connection assembly of the present invention, the sheet body 300 is curved inward, and the arc of the inner side surface 310 of the sheet body 300 is equal to the arc of the outer side surface 123 of the arm 120; the radian of the outer side 302 of the sheet body 300 is equal to the radian of the outer side 131 of the arc-shaped boss 130, and the radial thickness of the sheet body 300 is equal to the radial thickness of the arc-shaped boss 130; when the sheet body 300 is placed on the arc-shaped boss 130, the sheet body 300 does not exceed the outer side surface 131 of the arc-shaped boss 130; namely, after the pedicle screw and the connecting sheet, the outer side contour of the connecting sheet is not larger than the outer side contour of the pedicle screw, and the basic operation is carried out in a channel formed by the two connecting sheets in the operation process, so that the skin incision in the minimally invasive spine operation can be only the largest dimension of the outer side surface of the pedicle screw required to pass through; the sheet body 300 is provided with a strip through hole 310, the elastic sheet 320 is arranged in the strip through hole 310, the inner side surface of the lower end of the elastic sheet 320 is provided with a positioning protrusion 330, and the positioning protrusion 330 is clamped into the clamping hole 122, so that the sheet body 300 can be stably connected with the pedicle screw; the height between the bottom surface of each baffle strip 340 and the bottom surface of the sheet body 300 is equal to the height between the arc-shaped boss 130 and the bottom surface 1212 of the notch groove 121, the two baffle strips 340 and the inner side surface of the sheet body enclose a sheet body clamping groove 350 into which the arm 120 is inserted, the arm 120 can be inserted into the sheet body clamping groove, and the sheet body clamping groove 350 can limit the radial displacement of the connecting sheet; the notch groove 121 can limit the axial displacement of the connecting sheet; thereby connecting the connecting sheet and the pedicle screw into a screw connecting assembly, the connecting sheet has the function of a long arm, and the connecting sheet is matched with other instruments to complete minimally invasive surgery, and the operation is simple; the connecting structure of the connecting sheet and the pedicle screw is simple and reliable, so that the operation in the operation is simple, and the operation time is saved; the connecting sheet is detachably connected with the pedicle screw, so the pedicle screw can be reused; the connecting sheet can be installed on the pedicle screw, so that the pedicle screw does not need to be provided with an extension arm part which is very long to manufacture, the processing and material cost of the pedicle screw production can be reduced, and the medical burden is lightened for patients.
The groove wall surface 1211 of the notch 121 is inclined with respect to the radial direction of the arm 120; opposite sides of the two barrier strips 340 are clamping surfaces 341, and the clamping surfaces 341 are obliquely arranged relative to the radial direction of the sheet body 300; when the arm 120 is inserted into the blade locking groove 350, each locking surface 341 contacts the groove wall 1211 of the corresponding notch groove 121. The arm 120 clamping surface 341 can limit the rotation of the chip body 300, so that the arm 120 can be more stably inserted into the connecting chip. In the embodiment, the groove wall surface 1211 of the two notch grooves 121 is folded from outside to inside, and the two clamping surfaces 341 corresponding to the groove wall surface 1211 of the two notch grooves 121 are also folded from outside to inside, which can further improve the stability of the clamping structure.
In this embodiment, the socket 104 is disposed in the nail seat 100, the head of the screw rod 200 is a ball 203, and the ball 203 is disposed in the socket 104. The screw shank 200 is rotatable relative to the socket 100.
Example 2
As shown in fig. 13, this embodiment is different from embodiment 1 in that the ball socket 104 is not provided in the interior of the socket 100, and the head of the screw rod 200 is connected to the bottom of the socket body 110.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (4)
1. A pedicle screw, comprising:
the nail comprises a nail seat (100), wherein an installation groove (101) is formed in the top of the nail seat (100), the installation groove (101) is recessed downwards from the top of the nail seat (100) and penetrates through the nail seat (100) in the radial direction, and a locking thread part (102) is formed in the inner side surface of the installation groove (101); the nail seat (100) comprises a seat body (110) and a nail arm arranged at the upper end of the seat body (110), wherein the nail arm comprises two oppositely arranged arm parts (120) which are respectively arranged at two sides of the mounting groove (101); each arm (120) is arc-shaped; an inward curved arc-shaped boss (130) is arranged on the outer side surface of the lower part of each arm part (120);
notch grooves (121) are respectively formed in the edges of two sides of each arm part (120), the notch grooves (121) extend to the top surface of each arm part (120), and the notch grooves (121) are located above the arc-shaped bosses (130); a clamping hole (122) is formed in the outer side surface (123) of the arm part (120);
the screw rod (200), the bottom of the screw seat (100) is connected with the screw rod (200), and an axial through hole (201) is arranged on the screw rod (200);
the groove wall surface (1211) of the notch groove (121) is inclined relative to the radial direction of the arm part (120); the groove wall surfaces (1211) of the two notch grooves (121) are of a structure which is folded from outside to inside.
2. A pedicle screw as claimed in claim 1, wherein: the top of the inner side surface of the mounting groove (101) is provided with a guide concave part (103), the guide concave part (103) is arranged along the circumferential direction of the inner side surface of the mounting groove (101), and the locking threaded part (102) is arranged below the guide concave part (103).
3. A pedicle screw as claimed in claim 1, wherein: two opposite cutting grooves (202) are formed in the outer side face of the lower end of the screw rod (200), and the cutting grooves (202) are communicated with the axial through holes (201).
4. A screw connection assembly, comprising: two connecting tabs and a pedicle screw as claimed in any of claims 1-3;
each connecting piece comprises an arc-shaped piece body (300), the piece body (300) is bent inwards, and the radian of the inner side surface (301) of the piece body (300) is equal to the radian of the outer side surface (123) of the arm part (120); the radian of the outer side (302) of the sheet body (300) is equal to the radian of the outer side (131) of the arc-shaped boss (130), and the radial thickness of the sheet body (300) is equal to the radial thickness of the arc-shaped boss (130); the sheet body (300) is provided with a strip through hole (310), and the length direction of the strip through hole (310) is in the same direction as the vertical direction of the sheet body (300); the elastic piece (320) is arranged in the strip through hole (310), the upper end of the elastic piece (320) is connected with the upper end of the strip through hole (310), and the inner side surface of the lower end of the elastic piece (320) is provided with a positioning protrusion (330);
two opposite edges of the inner side surface (301) of the sheet body (300) are respectively provided with a baffle strip (340) which is vertically arranged, and the height between the bottom surface of each baffle strip (340) and the bottom surface of the sheet body (300) is equal to the height between the arc-shaped boss (130) and the bottom surface (1212) of the notch groove (121); two baffle strips (340) and an inner side surface (301) of the sheet body (300) enclose a sheet body clamping groove (350) into which the arm (120) is inserted;
each sheet body (300) is placed on the corresponding arc-shaped boss (130), the inner side surface (301) of the sheet body (300) is in contact with the outer side surface (123) of the corresponding arm part (120), and the positioning protrusion (330) is clamped into the clamping hole (122);
the groove wall surface (1211) of the notch groove (121) is inclined relative to the radial direction of the arm part (120);
opposite side surfaces of the two barrier strips (340) are clamping surfaces (341), and the clamping surfaces (341) are obliquely arranged relative to the radial direction of the sheet body (300); when the arm (120) is inserted into the sheet body clamping groove (350), each clamping surface (341) is contacted with a groove wall surface (1211) of the corresponding notch groove (121); the two clamping surfaces (341) corresponding to the groove wall surfaces (1211) of the two notch grooves (121) are of an outward-inward folded structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310153000.4A CN116172678A (en) | 2020-04-26 | 2020-04-26 | Pedicle screw and screw connection assembly |
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| CN202010340424.8A CN113545834B (en) | 2020-04-26 | 2020-04-26 | Pedicle screw and screw connection assembly |
| CN202310153000.4A CN116172678A (en) | 2020-04-26 | 2020-04-26 | Pedicle screw and screw connection assembly |
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| CN202010340424.8A Division CN113545834B (en) | 2020-04-26 | 2020-04-26 | Pedicle screw and screw connection assembly |
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| CN116172678A true CN116172678A (en) | 2023-05-30 |
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| CN202010340424.8A Active CN113545834B (en) | 2020-04-26 | 2020-04-26 | Pedicle screw and screw connection assembly |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7918858B2 (en) * | 2006-09-26 | 2011-04-05 | Depuy Spine, Inc. | Minimally invasive bone anchor extensions |
| US8535318B2 (en) * | 2010-04-23 | 2013-09-17 | DePuy Synthes Products, LLC | Minimally invasive instrument set, devices and related methods |
| US9345519B1 (en) * | 2010-07-02 | 2016-05-24 | Presidio Surgical, Inc. | Pedicle screw |
| ES2504068T3 (en) * | 2011-08-18 | 2014-10-08 | Biedermann Technologies Gmbh & Co. Kg | Polyaxial bone anchoring system |
| CN102871716B (en) * | 2012-10-17 | 2015-02-11 | 中国人民解放军第三军医大学第二附属医院 | Pedicle screw and spine percutaneous internal fixing system |
| CN103908330A (en) * | 2014-03-31 | 2014-07-09 | 广州医科大学附属第一医院 | Self-guide long-arm solid percutaneous pedicle screw |
| CN107736925B (en) * | 2017-11-14 | 2020-03-24 | 山东威高骨科材料股份有限公司 | Sleeve, auxiliary device for installing connecting rod and installation method of connecting rod |
| CN208710045U (en) * | 2018-01-23 | 2019-04-09 | 迪恩医疗科技有限公司 | Vertebral column minimally invasive percutaneously rotates assembled pedicle of vertebral arch screw tack operation nail system |
| CN208876714U (en) * | 2018-05-14 | 2019-05-21 | 江苏国立医疗器械有限公司 | A kind of minimally invasive pedicle nail of soft tail |
| CN110169815B (en) * | 2019-05-15 | 2022-03-18 | 迪恩医疗科技有限公司 | Rigid extension sheet and pedicle screw |
| CN213047218U (en) * | 2020-04-26 | 2021-04-27 | 上海三友医疗器械股份有限公司 | Pedicle screw and screw connection assembly |
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| CN113545834A (en) | 2021-10-26 |
| CN113545834B (en) | 2024-06-21 |
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