CN214966476U - High-reliability bone screw system for spinal surgery - Google Patents
High-reliability bone screw system for spinal surgery Download PDFInfo
- Publication number
- CN214966476U CN214966476U CN202120142891.XU CN202120142891U CN214966476U CN 214966476 U CN214966476 U CN 214966476U CN 202120142891 U CN202120142891 U CN 202120142891U CN 214966476 U CN214966476 U CN 214966476U
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- China
- Prior art keywords
- screw
- groove
- spherical ring
- connecting rod
- spinal surgery
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 12
- 238000001356 surgical procedure Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 abstract description 4
- 230000007704 transition Effects 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 206010055039 Intervertebral disc compression Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 206010029174 Nerve compression Diseases 0.000 description 1
- 208000007103 Spondylolisthesis Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 206010041569 spinal fracture Diseases 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
A high-reliability bone screw system for spinal surgery relates to the technical field of medical instruments for spinal surgery, and structurally comprises a screw base, a ball head nail, a spherical ring, a fastening screw plug and a connecting rod; the surgical operation tool is characterized in that a row of grooves with the width of 0.1-0.5 mm and the depth of 0.1-0.5 mm are formed in the surface of a C-shaped groove, which is in contact with a connecting rod, of a spherical ring, in the operation process, the connecting rod is tightly held between a fastening screw plug and the spherical ring through screwing the fastening screw plug, the connecting rod is subjected to micro deformation through the grooves in the spherical ring, the friction force is increased, the strength between the connecting rod and a screw seat is increased, and the safety and reliability of the operation are improved.
Description
Technical Field
The invention relates to the technical field of internal implant medical instruments used in a spinal surgery, in particular to a bone screw system which is used for spinal fixation, high in reliability and high in skid resistance.
Background
It is known that in the field of spinal orthopedic surgery, for the treatment of spinal fractures, spondylolisthesis, tumors, lateral curvature, etc., the effective surgical method is to use a spinal fixation screw system for fixation. The existing spine fixing screw system consists of a screw seat, a ball head nail, a spherical ring, a fastening screw plug and a connecting rod, wherein the ball head nail and the spherical ring are connected with the screw seat through an assembly hole on the screw seat, the fixing screw plug is assembled with the screw seat through a threaded structure, the connecting rod is fixedly connected with the screw seat through the extrusion of the fixing screw plug and the spherical ring, and the connecting mode is the most common and effective mode at present, however, because the contact surface of the spherical ring and the connecting rod is a round surface and the contact surface of the fixed screw plug and the connecting rod is a flat plane, after the screw plug is locked and fastened, because the gravity of the human body presses, the connecting rod and the screw seat still slide, which can be found only by CT examination after the operation, at this time, the patient is affected by aggravation, and the patient suffers from intervertebral disc compression, nerve compression, aggravation of fracture and the like. Some doctors know that the connecting rod and the screw seat can slide in the operation, so when the fastening screw plug is locked, the torque larger than the torque specified by an instrument manufacturer can be applied, the problems of fracture of the external thread bottom of the fastening screw plug and expansion of the screw seat can be caused, and the problems can still generate certain influence on the recovery of postoperative patients. These problems still exist at present and cannot be avoided.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the bone screw system with excellent locking effect and high safety and reliability.
The technical scheme adopted by the invention for solving the defects of the prior art is as follows:
the utility model provides a high reliability bone screw system for spinal surgery, its structure includes the screw seat, the bulb nail, spherical ring, fastening plug screw and connective bar, be equipped with the pilot hole on the screw seat, be equipped with the elongated slot that is used for wearing the connective bar on the screw seat, there is screw thread structure at elongated slot both ends, the bulb nail inserts in the screw seat, spherical ring is equipped with the one end cover of ball socket at ball head nail spherical overhead, the fastening plug screw outside is equipped with screw thread structure, can the screw in screw seat, the connective bar inserts between fastening plug screw and the spherical ring, there is the C type groove with the connective bar contact on the spherical ring of its characterized in that, there is one row of recess on the C type groove surface, the length direction and the C type groove central line of recess are perpendicular.
The cross section of the groove on the surface of the C-shaped groove is semicircular or rectangular, the depth of the groove is 0.1-0.5 mm, the width of the groove is 0.1-0.5 mm, small planes are arranged between the grooves at intervals, and the width of each small plane is 0.2-0.5 mm.
The cross section profiles of the grooves on the surfaces of the C-shaped grooves are required to be in smooth transition, edges or corners at the connecting parts are in fillet transition of 0.1-0.2 mm, so that local stress concentration is avoided, and micro cracks caused by compression on the connecting rods are avoided.
When the screw is used, the connecting rod is placed in the screw seat, the connecting rod is ensured to be in contact with the C-shaped groove on the spherical ring, the fastening screw plug is screwed into the screw seat through a tool, the fastening screw plug is screwed, and the connecting rod is ensured to be extruded between the fastening screw plug and the C-shaped groove of the spherical ring. In the process of screwing the fastening screw plug, because the surface of the C-shaped groove on the spherical ring is provided with a row of grooves, the connecting rod can generate a certain amount of microscopic deformation, so that the axial friction force between the connecting rod and the fastening screw plug as well as the spherical ring is increased, and the safety and the reliability of the bone screw system are greatly improved.
Drawings
Fig. 1 is an assembly schematic of the present invention.
Fig. 2 is a schematic view of the structure of the spherical ring of the present invention.
Fig. 3 is an external view of the present invention after the connecting rod is installed.
Detailed Description
As shown in fig. 1, the bone screw system for high reliability spinal surgery structurally comprises a screw seat 1, a spherical ring 2, a ball stud 3, a fastening plug screw 4 and a connecting rod 5, wherein an assembly hole is formed in the screw seat 1, a long groove for penetrating the connecting rod 5 is formed in the screw seat 1, thread structures are arranged at two ends of the long groove, the ball stud 3 is inserted into the screw seat 1, one end of the spherical ring 2, which is provided with a ball socket, is sleeved on the spherical head of the ball stud 3, the thread structure is arranged on the outer side of the fastening plug screw 4 and can be screwed into the screw seat 1, and the connecting rod 5 is inserted between the fastening plug screw 4 and the spherical ring 2.
The cross section of the groove 211 on the surface of the C-shaped groove 21 is semicircular or rectangular, the depth of the groove 211 is 0.1-0.5 mm, the width of the groove 211 is 0.1-0.5 mm, the small planes 212 are arranged between the grooves 211 at intervals, and the width of the small planes 212 is 0.2-0.5 mm.
In the invention, the edges or corners of the connecting part of the groove 211 on the surface of the C-shaped groove 21 are in fillet transition of 0.1-0.2 mm, so that local stress concentration is avoided, and micro cracks caused by compression on the connecting rod 5 are avoided.
When the screw is used, the connecting rod 5 is placed in the screw seat 1, the connecting rod 5 is ensured to be in contact with the C-shaped groove 21 on the spherical ring 2, the fastening screw plug 4 is screwed into the screw seat through a tool, the fastening screw plug 4 is screwed, and the connecting rod 5 is ensured to be squeezed between the fastening screw plug 4 and the C-shaped groove 21 of the spherical ring 2. In the process of screwing the fastening screw plug 4, because the surface of the C-shaped groove 21 on the spherical ring 2 is provided with the row of grooves 211, a certain amount of micro deformation of the connecting rod can be generated, so that the axial friction force between the connecting rod 5 and the fastening screw plug 4 and the spherical ring 2 is increased, and the safety and the reliability of the bone screw system are greatly improved.
Claims (3)
1. The utility model provides a high reliability bone screw system for spinal surgery, its structure includes the screw seat, the bulb nail, spherical ring, fastening plug screw and connective bar, be equipped with the pilot hole on the screw seat, be equipped with the elongated slot that is used for wearing the connective bar on the screw seat, there is screw thread structure at elongated slot both ends, the bulb nail inserts in the screw seat, spherical ring is equipped with the one end cover of ball socket at ball head nail spherical overhead, the fastening plug screw outside is equipped with screw thread structure, can the screw in screw seat, the connective bar inserts between fastening plug screw and the spherical ring, there is the C type groove with the connective bar contact on the spherical ring of its characterized in that, there is one row of recess on the C type groove surface, the length direction and the C type groove central line of recess are perpendicular.
2. The bone screw system for high reliability spinal surgery according to claim 1, wherein the cross-sectional shape of the groove on the surface of the C-shaped groove is a semi-circular arc or a rectangle, the depth of the groove is 0.1 to 0.5mm, the width of the groove is 0.1 to 0.5mm, and there are spaced facets between the groove and the groove, and the width of the facets is 0.2 to 0.5 mm.
3. The bone screw system for spinal surgery of claim 1 or 2, wherein the connecting rod is held tightly between the fastening plug and the spherical ring during tightening of the fastening plug, and the groove in the spherical ring allows microscopic deformation of the connecting rod by an amount of 0.02 to 0.1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120142891.XU CN214966476U (en) | 2021-01-20 | 2021-01-20 | High-reliability bone screw system for spinal surgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120142891.XU CN214966476U (en) | 2021-01-20 | 2021-01-20 | High-reliability bone screw system for spinal surgery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214966476U true CN214966476U (en) | 2021-12-03 |
Family
ID=79141177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120142891.XU Expired - Fee Related CN214966476U (en) | 2021-01-20 | 2021-01-20 | High-reliability bone screw system for spinal surgery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214966476U (en) |
-
2021
- 2021-01-20 CN CN202120142891.XU patent/CN214966476U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211203 |