CN113384336B - Pedicle screw extension assembly and method of use - Google Patents
Pedicle screw extension assembly and method of use Download PDFInfo
- Publication number
- CN113384336B CN113384336B CN202110571861.5A CN202110571861A CN113384336B CN 113384336 B CN113384336 B CN 113384336B CN 202110571861 A CN202110571861 A CN 202110571861A CN 113384336 B CN113384336 B CN 113384336B
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- vertical
- groove
- arm
- grooves
- pedicle screw
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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
-
- 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
Abstract
The invention provides a pedicle screw extension assembly and a using method thereof, wherein the pedicle screw extension assembly comprises: a pedicle screw and two elastic pull rings; each elastic pull ring comprises two long rod parts and two short rod parts; the pedicle screw comprises a screw seat and a screw rod connected with the bottom of the screw seat; the top of the nail seat is provided with an installation groove; the nail seat comprises a seat body and a nail arm, and the nail arm comprises two arm parts; each arm part is arc-shaped; a transverse groove and two vertical grooves are arranged on the outer side surface of each arm part; the vertical groove is used for the insertion of the long rod part, and the transverse groove is used for the insertion of the transverse groove; the outer side surface of each arm part is also provided with a mounting long hole; the top surface of each arm part is provided with two vertical accommodating holes, the inner side surface of each arm part is provided with two bearing grooves, the bearing grooves correspond to the vertical accommodating holes one by one, and the bearing grooves are communicated with the corresponding vertical accommodating holes; the lower end of each bearing groove is communicated with the mounting long hole. The pedicle screw extension component has the advantages of simple structure, high strength, safety, reliability and low cost.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a pedicle screw extension assembly and a using method thereof.
Background
Currently, pedicle screws are widely used in posterior spinal surgery, wherein the extension of the screw arm in minimally invasive surgery is diversified. The extension piece of the high polymer material has poor strength and is easy to break or fracture in the operation, and the cost of the extension piece of the high polymer material is higher; the extension mode of the sleeve type has too small visual field and higher processing cost of the sleeve; and the processing cost and the material cost of the overlong tail screw of the fully-implanted material are too high. The problem to be solved by those skilled in the art is how to design an extension structure of pedicle screw with high strength, low cost and large visual field
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention solves the technical problem of providing a high strength, low cost, large field of view pedicle screw extension assembly and method of use thereof.
To achieve the above and other related objects, the present invention provides a pedicle screw extension assembly, comprising: the pedicle screw and the two elastic pull rings;
each elastic pull ring comprises two long rod parts arranged in parallel and two short rod parts arranged in parallel, and two ends of each long rod part are connected with the end parts of the two short rod parts respectively; the length of the long rod part is greater than that of the short rod part;
the pedicle screw comprises a screw seat and a screw rod connected with the bottom of the screw seat; the top of the nail seat is provided with a mounting groove, and the mounting groove is sunken downwards from the top of the nail seat and penetrates through the nail seat along the radial direction; the nail seat comprises a seat body and a nail arm arranged at the upper end of the seat body, and the nail arm comprises two oppositely arranged arm parts which are respectively positioned at two sides of the mounting groove; each arm portion is arc-shaped; a transverse groove and two vertical grooves which are arranged in parallel are arranged on the outer side surface of each arm part, the transverse grooves are arranged along the horizontal direction, the vertical grooves are perpendicular to the transverse grooves, and the lower end of each vertical groove is communicated with the transverse grooves; the vertical groove is used for the long rod part to insert, and the transverse groove is used for the short rod part to insert; an installation long hole is further formed in the outer side face of each arm portion and communicated with the installation groove, the installation long hole is located above the transverse groove, and the installation long hole is communicated with the upper end of each vertical groove; two vertical accommodating holes are formed in the top surface of each arm part, the vertical accommodating holes are communicated with the installation long holes, the vertical accommodating holes correspond to the vertical grooves one by one, and each vertical accommodating hole is located right above the corresponding vertical groove; two bearing grooves are formed in the inner side face of the arm part, the bearing grooves correspond to the vertical accommodating holes one by one, and each bearing groove is communicated with the corresponding vertical accommodating hole; the lower end of each bearing groove is communicated with the mounting long hole.
Preferably, in each arm portion, the distance between the two receiving grooves increases from inside to outside.
Preferably, the material of the elastic pull ring is nickel titanium alloy.
The invention discloses a using method of a pedicle screw extension assembly, which is characterized by comprising the following steps of:
1) The elastic pull ring is inserted into the installation long hole from the outer side of the arm part, the elastic pull ring is pulled out from the installation groove, two long rod parts of the elastic pull ring respectively pass through the corresponding bearing grooves, the two long rod parts are inserted into the corresponding vertical containing holes, the lower parts of the two long rod parts are inserted into the two vertical grooves, the short rod parts positioned below are inserted into the transverse grooves, and the elastic pull ring is straightened;
2) And repeating the step 1) and installing another elastic pull ring.
As mentioned above, the pedicle screw extension assembly and the use method thereof have the following beneficial effects:
when the pedicle screw extension assembly is used, the elastic pull ring is inserted into the mounting long hole from the outer side of the arm part and pulled out from the mounting groove, two long rod parts of the elastic pull ring respectively pass through the corresponding bearing grooves, the two long rod parts are inserted into the corresponding vertical containing holes, the lower parts of the two long rod parts are inserted into the two vertical grooves, the lower short rod parts are inserted into the transverse grooves, and the elastic pull ring is straightened; in the pedicle screw extension assembly, the elastic pull ring is an extension tool, and the lower part of the elastic pull ring is embedded into the screw arm of the screw seat, so that the space required by implantation can be reduced, the incision is small, and the pedicle screw extension assembly is beneficial to recovery of a patient; the pedicle screw extension component is convenient, rapid and reliable in assembly operation; the pedicle screw extension component has the advantages of simple structure, high strength, safety, reliability and low cost; since the elastic pull ring includes two long rod portions and two short rod portions, the elastic pull ring has less blocking effect on the surgical field.
Drawings
Fig. 1 is a perspective view showing the elastic pull ring of the pedicle screw extension assembly according to the embodiment inserted into the installation slot from the outside of the arm portion.
Fig. 2 is a perspective view of the elastic pull ring of the pedicle screw extension assembly of this embodiment being pulled out of the mounting groove.
Fig. 3 is a schematic perspective view showing the two long rod portions of the elastic pull ring of the pedicle screw extension assembly of this embodiment inserted into the corresponding vertical receiving holes, the lower portions of the two long rod portions inserted into the two vertical grooves, the lower short rod portion of the elastic pull ring inserted into the transverse groove, and the elastic pull ring straightened.
Fig. 4 is an enlarged schematic view of a structure in fig. 3.
Fig. 5 is a perspective view of another elastic pull ring of the present embodiment mounted in the corresponding arm portion.
Fig. 6 shows a perspective view of a pedicle screw as the pedicle screw extension assembly of the present embodiment.
FIG. 7 is a schematic top view of the pedicle screw as the pedicle screw extension assembly of the present embodiment.
Fig. 8 is a schematic top view of the elastic pull ring of the pedicle screw extension assembly of the embodiment.
Description of the reference numerals
100. Pedicle screw
110. Nail seat
111. Mounting groove
112. Seat body
113. Arm part
114. Transverse groove
115. Vertical groove
116. Mounting slot hole
117. Vertical storage hole
118. Receiving groove
1181. Trough side wall
120. Screw rod
200. Elastic pull ring
210. Long rod part
220. Short rod part
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to the attached drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms may be changed or adjusted without substantial change in the technical content.
As shown in fig. 1 to 8, the pedicle screw extension assembly of the present embodiment includes: a pedicle screw 100 and two elastic pull rings 200;
each elastic pull ring 200 comprises two long rod parts 210 arranged in parallel and two short rod parts 220 arranged in parallel, two ends of each long rod part 210 are respectively connected with the end parts of the two short rod parts 220, and the elastic pull ring 200 is in a quadrilateral structure; the length of the long rod portion 210 is greater than the length of the short rod portion 220;
the pedicle screw 100 includes a screw receptacle 110 and a screw shaft 120 connected to the bottom of the screw receptacle 110; the top of the nail seat 110 is provided with a mounting groove 111, the mounting groove 111 is recessed downwards from the top of the nail seat 110 and radially penetrates through the nail seat 110, and the inner side surface of the mounting groove 111 is provided with a locking thread part; the nail seat 110 comprises a seat body 112 and a nail arm arranged at the upper end of the seat body 112, wherein the nail arm comprises two oppositely arranged arm parts 113 which are respectively positioned at two sides of the mounting groove 111; each arm 113 is arc-shaped; a transverse groove 114 and two vertical grooves 115 arranged in parallel are arranged on the outer side surface of each arm part 113, the transverse grooves 114 are arranged along the horizontal direction, the vertical grooves 115 are perpendicular to the transverse grooves 114, and the lower end of each vertical groove 115 is communicated with the transverse grooves 114; the vertical slot 115 is used for inserting the long rod part 210, and the transverse slot 114 is used for inserting the short rod part 220; an installation long hole 116 is further formed in the outer side face of each arm portion 113, the installation long hole 116 is communicated with the installation groove 111, the installation long hole 116 is located above the transverse groove 114, and the installation long hole 116 is communicated with the upper end of each vertical groove 115; two vertical accommodating holes 117 are formed in the top surface of each arm portion 113, the vertical accommodating holes 117 are communicated with the mounting long holes 116, the vertical accommodating holes 117 correspond to the vertical grooves 115 one to one, and each vertical accommodating hole 117 is located right above the corresponding vertical groove 115; two receiving grooves 118 are formed in the inner side surface of the arm portion 113, the receiving grooves 118 correspond to the vertical receiving holes 117 one by one, and each receiving groove 118 is communicated with the corresponding vertical receiving hole 117; the lower end of each receiving groove 118 communicates with the mounting long hole 116. The transverse groove 114, the two vertical grooves 115, and the vertical receiving hole 117 directly above the respective vertical grooves 115 constitute a U-shaped channel structure for assembling the elastic tab 200. The horizontal direction of the pedicle screw 100 is perpendicular to the axial direction of the screw shaft 120.
When the pedicle screw extension assembly is used, the elastic pull ring 200 is inserted into the mounting long hole 116 from the outer side of the arm part 113, and the elastic pull ring 200 is pulled out from the mounting groove 111; since the elastic tab 200 has an elastic structure, after the two long rod portions 210 of the elastic tab 200 pass through the corresponding receiving grooves 118, the two long rod portions 210 are inserted into the corresponding vertical receiving holes 117, the lower portions of the two long rod portions 210 are inserted into the two vertical grooves 115, the lower short rod portion 220 is inserted into the transverse groove 114, and the elastic tab 200 is straightened, so that the lower portion of the elastic tab 200 is inserted into the U-shaped channel structure of the nail arm of the nail seat 110.
In each arm portion 113, the distance between the two receiving grooves 118 increases from the inside to the outside. This structure enables the two long rod portions 210 of the elastic tab 200 to be restricted from falling inward after the two long rod portions 210 of the elastic tab 200 are inserted into the corresponding vertical receiving holes 117, so that the two receiving grooves 118 in each arm portion 113 are disposed to be inclined to each other, so that the receiving grooves 118 function as stopper grooves.
In order to make the structure more compact, the vertical receiving holes 117 are circular holes, and the groove side wall 1181 of each receiving groove 118 is tangent to the connected vertical receiving hole 117.
The material of the elastic pull ring 200 is nitinol. This structure enables the elastic tab 200 to have both elasticity and high strength.
The invention discloses a using method of a pedicle screw extension assembly, which is characterized by comprising the following steps of:
1) The elastic tab 200 is inserted into the installation long hole 116 from the outside of the arm part 113, the elastic tab 200 is pulled out from the installation groove 111, two long rod parts 210 of the elastic tab 200 pass through the corresponding receiving grooves 118, the two long rod parts 210 are inserted into the corresponding vertical receiving holes 117, the lower parts of the two long rod parts 210 are inserted into the two vertical grooves 115, the short rod part 220 at the lower part is inserted into the transverse groove 114, and the elastic tab 200 is straightened;
2) Repeating the step 1) to install another elastic pull ring 200.
In the pedicle screw extension assembly, the elastic pull ring 200 is an extension tool, and the lower part of the elastic pull ring 200 is embedded into the screw arm of the screw seat 110, so that the space required by implantation can be reduced, the incision is small, and the pedicle screw extension assembly is favorable for recovery of a patient; the pedicle screw extension assembly is convenient, rapid and reliable in assembly operation; the pedicle screw extension component has the advantages of simple structure, high strength, safety, reliability and low cost, and can directly benefit patients; since the elastic tab 200 includes two long lever portions 210 and two short lever portions 220, the elastic tab 200 has less blocking effect on the surgical field.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (4)
1. A pedicle screw extension assembly, comprising: a pedicle screw (100) and two elastic pull rings (200); each elastic pull ring (200) comprises two long rod parts (210) arranged in parallel and two short rod parts (220) arranged in parallel, and two ends of each long rod part (210) are respectively connected with the ends of the two short rod parts (220); the length of the long rod part (210) is greater than that of the short rod part (220);
the pedicle screw (100) comprises a screw seat (110) and a screw rod (120) connected with the bottom of the screw seat (110); the top of the nail seat (110) is provided with a mounting groove (111), and the mounting groove (111) is recessed downwards from the top of the nail seat (110) and penetrates through the nail seat (110) along the radial direction; the nail seat (110) comprises a seat body (112) and a nail arm arranged at the upper end of the seat body (112), and the nail arm comprises two oppositely arranged arm parts (113) which are respectively positioned at two sides of the mounting groove (111); each arm (113) is arc-shaped; a transverse groove (114) and two vertical grooves (115) arranged in parallel are formed in the outer side surface of each arm part (113), the transverse grooves (114) are arranged along the horizontal direction, the vertical grooves (115) are perpendicular to the transverse grooves (114), and the lower end of each vertical groove (115) is communicated with the transverse grooves (114); the vertical groove (115) is used for inserting the long rod part (210), and the transverse groove (114) is used for inserting the short rod part (220); an installation long hole (116) is further formed in the outer side face of each arm portion (113), the installation long hole (116) is communicated with the installation groove (111), the installation long hole (116) is located above the transverse groove (114), and the installation long hole (116) is communicated with the upper end of each vertical groove (115); two vertical accommodating holes (117) are formed in the top surface of each arm portion (113), the vertical accommodating holes (117) are communicated with the mounting long holes (116), the vertical accommodating holes (117) correspond to the vertical grooves (115) one by one, and each vertical accommodating hole (117) is located right above the corresponding vertical groove (115); two bearing grooves (118) are arranged on the inner side surface of the arm part (113), the bearing grooves (118) correspond to the vertical accommodating holes (117) one by one, and each bearing groove (118) is communicated with the corresponding vertical accommodating hole (117); the lower end of each bearing groove (118) is communicated with the installation long hole (116).
2. The pedicle screw extension assembly according to claim 1, wherein: in each arm part (113), the distance between the two bearing grooves (118) is increased from inside to outside.
3. The pedicle screw extension assembly according to claim 1, wherein: the elastic pull ring (200) is made of nickel-titanium alloy.
4. The method of using a pedicle screw extension assembly according to any one of claims 1-3, comprising the steps of:
1) The elastic pull ring (200) is inserted into the installation long hole (116) from the outer side of the arm part (113), the elastic pull ring (200) is pulled out from the installation groove (111), two long rod parts (210) of the elastic pull ring (200) respectively pass through corresponding bearing grooves (118), the two long rod parts (210) are inserted into corresponding vertical containing holes (117), the lower parts of the two long rod parts (210) are inserted into two vertical grooves (115), a short rod part (220) at the lower part is inserted into a transverse groove (114), and the elastic pull ring (200) is straightened;
2) Repeating the step 1) and installing another elastic pull ring (200).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571861.5A CN113384336B (en) | 2021-05-25 | 2021-05-25 | Pedicle screw extension assembly and method of use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110571861.5A CN113384336B (en) | 2021-05-25 | 2021-05-25 | Pedicle screw extension assembly and method of use |
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| Publication Number | Publication Date |
|---|---|
| CN113384336A CN113384336A (en) | 2021-09-14 |
| CN113384336B true CN113384336B (en) | 2023-01-13 |
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| CN202110571861.5A Active CN113384336B (en) | 2021-05-25 | 2021-05-25 | Pedicle screw extension assembly and method of use |
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| CN102920502A (en) * | 2012-11-09 | 2013-02-13 | 上海三友医疗器械有限公司 | Extension sheets of pedicle screw tail, expander, and tamper reset rod |
| CN103908331A (en) * | 2014-04-02 | 2014-07-09 | 山东冠龙医疗用品有限公司 | Pedicle screw for minimally invasive surgery |
| WO2016041249A1 (en) * | 2014-09-17 | 2016-03-24 | 常州市康辉医疗器械有限公司 | Lengthened minimally-invasive hollow pedicle screw |
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| CN113384336A (en) | 2021-09-14 |
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