CN114848114A - High-reliability bone screw system for spinal surgery - Google Patents

High-reliability bone screw system for spinal surgery Download PDF

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Publication number
CN114848114A
CN114848114A CN202110071942.9A CN202110071942A CN114848114A CN 114848114 A CN114848114 A CN 114848114A CN 202110071942 A CN202110071942 A CN 202110071942A CN 114848114 A CN114848114 A CN 114848114A
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CN
China
Prior art keywords
screw
groove
spherical ring
connecting rod
spinal surgery
Prior art date
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.)
Pending
Application number
CN202110071942.9A
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Chinese (zh)
Inventor
于海洋
于朝亮
崔西龙
张旭
徐文强
其他发明人请求不公开姓名
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202110071942.9A priority Critical patent/CN114848114A/en
Publication of CN114848114A publication Critical patent/CN114848114A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
    • A61B17/7064—Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • 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
    • A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B2017/564—Methods for bone or joint treatment

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  • 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)
  • 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

High-reliability bone screw system for spinal surgery
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 minimally invasive 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 surrounding deformation, thereby increasing the axial friction force between the connecting rod and the fastening screw plug as well as the spherical ring, and greatly improving the safety and reliability of the bone screw system.
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.

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 a spherical ball-and-socket pot head and is overhead at bulb nail, the fastening plug screw outside is equipped with screw thread structure, can screw in the 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 C type groove surface, the length direction of recess is perpendicular with C type groove central line.
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 and 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.
CN202110071942.9A 2021-01-20 2021-01-20 High-reliability bone screw system for spinal surgery Pending CN114848114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110071942.9A CN114848114A (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
CN202110071942.9A CN114848114A (en) 2021-01-20 2021-01-20 High-reliability bone screw system for spinal surgery

Publications (1)

Publication Number Publication Date
CN114848114A true CN114848114A (en) 2022-08-05

Family

ID=82623520

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110071942.9A Pending CN114848114A (en) 2021-01-20 2021-01-20 High-reliability bone screw system for spinal surgery

Country Status (1)

Country Link
CN (1) CN114848114A (en)

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