CN109199558A - 一种防止顶丝松动的椎弓根螺钉 - Google Patents

一种防止顶丝松动的椎弓根螺钉 Download PDF

Info

Publication number
CN109199558A
CN109199558A CN201710522582.3A CN201710522582A CN109199558A CN 109199558 A CN109199558 A CN 109199558A CN 201710522582 A CN201710522582 A CN 201710522582A CN 109199558 A CN109199558 A CN 109199558A
Authority
CN
China
Prior art keywords
jackscrew
pitman
nail seat
shaped groove
pedicle screw
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
CN201710522582.3A
Other languages
English (en)
Inventor
孙培锋
李弘川
王玲娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201710522582.3A priority Critical patent/CN109199558A/zh
Publication of CN109199558A publication Critical patent/CN109199558A/zh
Pending legal-status Critical Current

Links

Classifications

    • 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
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074—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
    • A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B2017/564—Methods for bone or joint treatment

Landscapes

  • 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

本发明属于医疗器械技术领域，为解决因运动而致的振动过程中现有椎弓根螺钉的顶丝容易松动、甚至脱落的技术问题，提供了一种防止顶丝松动的椎弓根螺钉，包括螺钉主体、钉座、顶丝和连接棒，钉座设置在螺钉主体上，钉座上设有U形凹槽，顶丝容置于U形凹槽内，连接棒从顶丝的底部穿过U形凹槽，顶丝与连接棒抵持，所述顶丝与连接棒相抵持的面上设有若干弹性凸起。本发明通过在顶丝的下表面设置弹性凸起，在振动过程中，弹性凸起起到了弹性垫片的作用，使得顶丝不容易松动，有效减缓了顶丝的脱落。

Description

一种防止顶丝松动的椎弓根螺钉
技术领域
本发明属于医疗器械技术领域，具体涉及一种防止顶丝松动的椎弓根螺钉。
背景技术
对于脊柱创伤、滑脱、退行性疾病和其他单段或多段骨折后椎体不稳，目前多采用椎弓根螺钉固定。目前所用的椎弓根螺钉包括螺钉主体、钉座、顶丝和连接棒，钉座设置在螺钉主体上，钉座上设有U形凹槽，顶丝容置于U形凹槽内，连接棒从顶丝的底部穿过U形凹槽，顶丝与连接棒抵持，但由于顶丝与连接棒相抵持的面为光滑的平面，在运动过程中由于振动顶丝容易松动、甚至脱落，从而导致植入的椎弓根螺钉失效。
发明内容
本发明为解决因运动而导致的振动过程中现有椎弓根螺钉的顶丝容易松动、甚至脱落的技术问题，提供了一种防止顶丝松动的椎弓根螺钉。
本发明采用的技术方案如下：
一种防止顶丝松动的椎弓根螺钉，包括螺钉主体、钉座、顶丝和连接棒，钉座设置在螺钉主体上，钉座上设有U形凹槽，顶丝容置于U形凹槽内，连接棒从顶丝的底部穿过U形凹槽，顶丝与连接棒抵持，所述顶丝与连接棒相抵持的面上设有若干弹性凸起。
所述弹性凸起为沙丘状、蜂窝状或环状。
所述弹性凸起的高度为0.3-0.5mm。
所述钉座内壁设有内螺纹，顶丝外壁设有外螺纹，顶丝螺纹连接在钉座内。
所述连接棒的横截面呈U形，且与钉座上的U形凹槽相匹配。
与现有技术相比，本发明的有益效果是：本发明通过在顶丝的下表面设置弹性凸起，在振动过程中，弹性凸起起到了弹性垫片的作用，可以起到一定的缓冲作用，使得顶丝不容易松动，有效减缓了顶丝的脱落。
附图说明
图1为本发明的结构示意图；
图2为本发明的顶丝下表面结构示意图。
图中：1-螺钉主体，2-钉座，3-顶丝，4-连接棒，5-弹性凸起。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1、2所示，一种防止顶丝松动的椎弓根螺钉，包括螺钉主体1、钉座2、顶丝3和连接棒4，钉座2设置在螺钉主体1上，钉座2上设有U形凹槽，顶丝3容置于U形凹槽内，所述钉座2内壁设有内螺纹，顶丝3外壁设有外螺纹，顶丝3螺纹连接在钉座2内。连接棒4从顶丝3的底部穿过U形凹槽，顶丝3与连接棒4抵持，所述顶丝3与连接棒4相抵持的面上设有若干弹性凸起5，所述弹性凸起5为沙丘状、蜂窝状或环状等，所述弹性凸起5的高度为0.3-0.5mm。
为了保证顶丝3与连接棒4接触的更稳定，所述连接棒4的横截面呈U形，且与钉座2上的U形凹槽相匹配。
本发明通过在顶丝3的下表面设置弹性凸起5，在振动过程中，弹性凸起5起到了缓冲的作用，使得顶丝3不容易松动，有效减缓了顶丝3的脱落。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

Claims (5)

1.一种防止顶丝松动的椎弓根螺钉，包括螺钉主体(1)、钉座(2)、顶丝(3)和连接棒(4)，钉座(2)设置在螺钉主体(1)上，钉座(2)上设有U形凹槽，顶丝(3)容置于U形凹槽内，连接棒(4)从顶丝(3)的底部穿过U形凹槽，顶丝(3)与连接棒(4)抵持，其特征在于：所述顶丝(3)与连接棒(4)相抵持的面上设有若干弹性凸起(5)。
2.根据权利要求1所述的一种防止顶丝松动的椎弓根螺钉，其特征在于：所述弹性凸起(5)为沙丘状、蜂窝状或环状。
3.根据权利要求1或2所述的一种防止顶丝松动的椎弓根螺钉，其特征在于：所述弹性凸起(5)的高度为0.3-0.5mm。
4.根据权利要求3所述的一种防止顶丝松动的椎弓根螺钉，其特征在于：所述钉座(2)内壁设有内螺纹，顶丝(3)外壁设有外螺纹，顶丝(3)螺纹连接在钉座(2)内。
5.根据权利要求1、2或4所述的一种防止顶丝松动的椎弓根螺钉，其特征在于：所述连接棒(4)的横截面呈U形，且与钉座(2)上的U形凹槽相匹配。
CN201710522582.3A 2017-06-30 2017-06-30 一种防止顶丝松动的椎弓根螺钉 Pending CN109199558A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710522582.3A CN109199558A (zh) 2017-06-30 2017-06-30 一种防止顶丝松动的椎弓根螺钉

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710522582.3A CN109199558A (zh) 2017-06-30 2017-06-30 一种防止顶丝松动的椎弓根螺钉

Publications (1)

Publication Number Publication Date
CN109199558A true CN109199558A (zh) 2019-01-15

Family

ID=64961074

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710522582.3A Pending CN109199558A (zh) 2017-06-30 2017-06-30 一种防止顶丝松动的椎弓根螺钉

Country Status (1)

Country Link
CN (1) CN109199558A (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109893233A (zh) * 2019-04-03 2019-06-18 常熟市第二人民医院 椎弓根钉棒结构

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109893233A (zh) * 2019-04-03 2019-06-18 常熟市第二人民医院 椎弓根钉棒结构

Similar Documents

Publication Publication Date Title
EP3593745A3 (en) Orthopedic screw and porous structures thereof
ATE464431T1 (de) Eisenbahnschwelle
CN109199558A (zh) 一种防止顶丝松动的椎弓根螺钉
CN208492270U (zh) 一种防止顶丝松动的椎弓根螺钉
CN101858575B (zh) 一种用于灯具的防松结构
CN107496018A (zh) 一种防断裂骨科钢板
CN209529511U (zh) 一种骨折病人术后石膏更换装置
CN109549696B (zh) 一种可调节双槽脊柱内固定装置以及骨螺钉
CN103598910A (zh) 脊柱前路固定板
CN203089332U (zh) 一种易调节的胫骨延长架
CN205795787U (zh) 一种骨科内固定装置
CN203724199U (zh) 新型单向万向二合一椎弓根钉
CN208640861U (zh) 一种全角度椎弓根螺钉
CN205054409U (zh) 稳固支撑型接骨板
CN202761426U (zh) 一种医疗护骨板
CN208799339U (zh) 可调节支抗丝张紧力的支抗钉
CN108904028B (zh) 一种改进型角度接骨板
CN103565616B (zh) 牙刷式骨突消除按摩器
CN208435755U (zh) 一种应力型加压锁定接骨装置
CN207768491U (zh) 一种新型后路椎弓根内固定器
CN202386773U (zh) 一种用于脊椎后路内固定的压棒螺母
CN203252772U (zh) 一种骨床制备器
CN204260807U (zh) 胸腰椎前路结构
CN109199557A (zh) 一种全角度椎弓根螺钉
CN104490463A (zh) 一种组合式骨螺钉

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination