WO2012065412A1 - 一种骨螺钉 - Google Patents

一种骨螺钉 Download PDF

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Publication number
WO2012065412A1
WO2012065412A1 PCT/CN2011/074145 CN2011074145W WO2012065412A1 WO 2012065412 A1 WO2012065412 A1 WO 2012065412A1 CN 2011074145 W CN2011074145 W CN 2011074145W WO 2012065412 A1 WO2012065412 A1 WO 2012065412A1
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WO
WIPO (PCT)
Prior art keywords
screw
screw rod
bone
thread
bone screw
Prior art date
Application number
PCT/CN2011/074145
Other languages
English (en)
French (fr)
Inventor
刘忠军
Original Assignee
孙正杰
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 孙正杰 filed Critical 孙正杰
Publication of WO2012065412A1 publication Critical patent/WO2012065412A1/zh

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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
    • A61B17/84—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
    • A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
    • 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

Definitions

  • the invention relates to a bone screw applied to the field of orthopedic consumables in the medical industry, which can be divided into two types: a bone screw for fixing the body part of the human body and a push screw for fixing the body part of the spine, which is especially suitable for bone. Loose bone injury patients.
  • screws are widely used in various fields such as production and living.
  • the screws are composed of two parts: a screw head and a screw rod.
  • the screw head has a circular or hexagonal shape. When the screw head is round, its end face is There is a "one" shape, "ten., glyph or "hexagonal" shaped force groove, the screw 4 is connected with the screw head, and the screw has the same tooth shape and the same pitch, the screw is suitable.
  • the working object is generally a rigid metal.
  • the bone screws currently used in the field of orthopedic consumables in the medical industry are also designed with reference to the above-mentioned industrial screws.
  • the human bones are designed to be equivalent to rigid materials (such as metal materials), and the human bones are easy to
  • the characteristics of the material that can be elastically deformed within a certain range under the action of a certain external force have obvious different characteristics from the rigid material. Therefore, the current bone screw is more common when the body is fixed in the fracture site or the spinal part.
  • the failure mode that is, the bone screw is loosened, self-exited, or even pulled out by external force after being stuck in the human skeleton for a period of time. The main reason is that the bone screw is equivalent to the human bone.
  • the material is designed without considering the material properties of the human body that are easily worn and can be elastically deformed within a certain range under the action of a certain external force.
  • the initial segment of the internal thread on the human skeleton Due to the screwing of multiple threads on the bone screw rod, the internal thread of the initial section is caused by the screwing
  • the mutual squeezing force between the external threaded thread on the tooth and the bone screw rod is reduced, which reduces the holding force (binding force) between the bone screw and the human bone, thereby causing the bone screw to remain in the human skeleton for a period of time.
  • the phenomenon of loosening, self-exit, or even being pulled out by external force may result in failure of the operation. Summary of the invention
  • the present invention is directed to the insufficient holding force (binding force) of bone screws in the field of orthopedic consumables in the medical industry, and proposes a high-holding (high-binding) bone screw suitable for human bones (especially bones of osteoporotic patients).
  • the invention can be achieved by the following measures:
  • the utility model relates to a high holding force (high binding force) bone screw, which comprises a screw head and a screw binding rod.
  • the rear end of the screw rod is connected with the screw head.
  • the thread pitch of the screw rod is kept unchanged, and the screw tooth thickness is self-threaded.
  • the front end of the rod increases to the rear end of the screw rod.
  • the bone screw of the present invention is thickened from the front end to the rear end of the screw by the thickness of the screw of the screw rod, so that after the bone screw is screwed into the human skeleton, the screw rod is in the direction of the axis of the screw rod from the front end to the rear end.
  • the two adjacent spiral teeth increase the pressing force of the human bone tissue between the two spiral teeth, which offsets the external thread screw of the screw rod caused by the internal thread thread formed on the human bone.
  • the holding force (bonding force) between the external threaded screw on the screw rod and the internal thread thread on the human bone is increased, thereby completely avoiding the looseness of the existing screw and self-control. The failure mode of exiting or even being pulled out by external force appears.
  • FIG. 1 is a schematic structural view of a bone screw using a prior art
  • FIG. 2 is a schematic structural view of a pusher screw using a prior art
  • FIG. 3 is a schematic structural view of a bone screw using the patented technology
  • Fig. 4 is a schematic view showing the structure of a pusher screw using the patented technology. detailed description
  • the present invention provides a high holding power (high binding force) bone screw (two types of tapping screw and push screw), including a screw head 1 and a screw rod 2,
  • the rear end of the screw pin 2 is connected to the screw head 1, and the pitch P of the screw 3 on the screw shaft 2 remains unchanged, which is the same as in the prior art.
  • the invention is characterized in that the tooth thickness T of the thread 3 on the screw jaw 2 of the bone screw is from the screw rod 2
  • the front end to the rear end are thickened by the circle. Since the screw thread 3 thick is thickened from the front end to the rear end of the screw, the bone screw is screwed into the human bone, and the screw rod is from the front end to the rear end along the axis of the screw rod.
  • the skeletal force of the human skeletal tissue between the two adjacent spiral teeth 3 to the two-circle thread increases the pressing force, which offsets the screw rod caused by the internal thread thread formed on the human bone.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (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)

Description

一种骨螺钉 本申请要求于 2010 年 11 月 18 日提交中国专利局、 申请号为 201010548930.2、 发明名称为"一种高把持力 （高结合力）骨螺钉"的中国 专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明是一种应用于医疗行业骨科耗材领域的骨螺釘， 可分为用于人 体骨折部位体内固定的接骨螺釘和用于脊柱部位体内固定的推弓根螺釘两 大类， 特别适用于骨质疏松的骨伤病人。
背景技术
众所周知， 螺釘作为一种紧固件广泛应用于生产、 生活等各个领域， 螺釘由螺钉头和螺钉杆两部分组成， 螺钉头呈圓形或六边形， 螺钉头呈圓 形时， 其端面上设有"一 "字形、 "十。，字形或"内六角 "形施力凹槽， 螺钉 4子 与螺钉头相连接， 螺釘軒上设有牙形相同、 螺距相等的螺牙， 这种螺釘适 用的工作对象一般是刚性的金属。
目前用于医疗行业骨科耗材领域的骨螺釘也是参照上述工业用螺釘设 计的， 如图 1、 图 2所示， 即把人体骨骼等同于刚性材料（如金属材料） 设计的， 而人体骨骼具有易磨损和在一定外力作用下可在一定范围内产生 弹性变形的材料特性， 与刚性材料具有明显的不同特性， 因此目前的骨螺 釘在对人体骨折部位或脊柱部位进行体内固定时， 有一种较为常见的失效 模式， 即： 骨螺釘在人体骨骼内留滞一段时间后就发生松动、 自行退出、 甚至被外力拔出的情况， 究其原因， 主要是目前这种骨螺釘是把人体骨骼 等同为刚性材料设计的， 而未考虑人体骨骼易磨损和在一定外力作用下可 在一定范围内产生弹性变形的材料特性， 当骨螺釘旋入人体骨骼时， 人体 骨骼上的内螺纹螺牙的初始段， 由于经过骨螺釘杆上多道螺牙的旋入造成 磨损使初始段的内螺纹螺牙与骨螺釘杆上的外螺纹螺牙之间的相互挤压力 变小而降低了骨螺釘与人体骨 之间的把持力（结合力），从而造成骨螺釘 在人体骨骼内留滞一段时间后会发生松动、 自行退出、 甚至被外力拔出的 现象而导致手术的失败。 发明内容
本发明针对目前医疗行业骨科耗材领域骨螺釘存在的把持力（结合力 ) 不足， 提出一种适用于人体骨骼（特别是骨质疏松患者骨骼） 的高把持力 (高结合力）骨螺釘。
本发明可以通过如下措施达到：
一种高把持力 （高结合力）骨螺釘， 包括螺釘头和螺訂杆两部分， 螺 釘杆的后端与螺钉头相连.接， 保持螺钉杆上螺纹螺距不变， 螺牙牙厚自螺 訂杆前端至螺钉杆后端逐圈增大。
应用本发明的骨螺釘由于螺釘杆螺牙的牙厚自螺釘前端向后端部逐 圈加厚， 就使得骨螺釘在旋入人体骨骼后， 螺釘杆自前端向后端沿螺釘杆 轴线方向上相邻两圈螺牙对两圈螺牙之间的人体骨骼组织逐圈加大了挤压 力， 在抵消了人体骨骼上形成的内螺纹螺牙因磨损而带来的与螺釘杆外螺 纹螺牙之间的挤压力降低的同时， 增大了螺釘杆上外螺纹螺牙与人体骨骼 上内螺纹螺牙之间的把持力 （结合力）， 从而彻底避免了现有螺釘的松动、 自行退出、 甚至被外力拔出的失效模式出现。 附图说明
图 1为应用现有技术的接骨螺釘的结构示意图；
图 2为应用现有技术的推弓根螺釘的结构示意图；
图 3为应用本专利技术的接骨螺釘的结构示意图；
图 4是应用本专利技术的推弓根螺釘结构示意图。 具体实施方式
如图 3、 图 4所示， 本发明提供了一种高把持力 （高结合力） 骨螺釘 (分接骨螺釘和推弓根螺釘两大类）， 包括螺钉头 1和螺釘杆 2两部分，螺 訂杆 2的后端与螺钉头 1相连接， 螺钉杆 2上螺牙 3的螺距保持 P保持不 变， 上述与现有技术相同。
本发明的特征在于骨螺钉的螺钉衧 2上的螺牙 3的牙厚 T自螺钉杆 2 前端至后端逐圈加厚， 由于螺釘螺牙 3牙厚自螺釘前端向后端逐圈加厚， 就使得骨螺釘在旋入人体骨 后， 螺釘杆自前端至后端沿螺釘杆轴线方向 上任何相邻两圈螺牙 3 对两圈螺牙之间的人体骨骼组织逐圈加大了挤压 力， 在抵消了人体骨骼上形成的内螺纹螺牙因磨损而带来的与螺釘杆外螺 纹螺牙之间的挤压力降低的同时， 增大了螺釘杆上外螺纹螺牙与人体骨骼 上形成的内螺纹螺牙之间的把持力（结合力），从而彻底避免了现有螺釘的 松动、 自行退出、 甚至被外力拔出的失效模式出现。

Claims

权 利 要 求
1、一种骨螺釘， 包括螺钉头和螺你杆，螺钉軒的后端与螺钉头相连接, 其特征在于， ^述螺钉軒上螺紋螺距保持不变. 螺紋螺牙牙厚由螺钉杆前
PCT/CN2011/074145 2010-11-18 2011-05-17 一种骨螺钉 WO2012065412A1 (zh)

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CN201010548930.2 2010-11-18
CN2010105489302A CN101972164B (zh) 2010-11-18 2010-11-18 一种高把持力、高结合力骨螺钉

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101972164B (zh) * 2010-11-18 2012-04-25 刘忠军 一种高把持力、高结合力骨螺钉
CN104398327A (zh) * 2014-12-18 2015-03-11 上海晟实医疗器械科技有限公司 一种骨骼连接固定用带多孔表面的锁定螺钉
EP3856084A4 (en) * 2018-09-26 2022-08-31 Adcura, Inc. EXPANDABLE AND ADJUSTABLE LORDOSIS INTERVERSE STABILIZATION SYSTEM

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5871486A (en) * 1993-01-21 1999-02-16 Acumed, Inc. Variable pitch bone screw
US6503252B2 (en) * 2001-02-21 2003-01-07 Henrik Hansson Bone screw, method for producing the threads thereof and drill for drilling holes therefor
US20080234760A1 (en) * 2007-03-23 2008-09-25 Zbigniew Matulaniec Bone screw apparatus and related methods of use
CN101972164A (zh) * 2010-11-18 2011-02-16 刘忠军 一种高把持力(高结合力)骨螺钉

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2402280Y (zh) * 1999-11-05 2000-10-25 苏继承 骨折固定加压螺纹钉
DE20111194U1 (de) * 2001-07-05 2001-09-20 Ejot Verbindungstech Gmbh & Co Schraube zum Eindrehen in einen Werkstoff niederer Festigkeit
CN2788753Y (zh) * 2005-05-31 2006-06-21 杨立群 通用型脊柱内固定系统
CN101632601B (zh) * 2009-08-19 2010-12-01 雷伟 一种医用椎弓根强化螺钉
CN201879816U (zh) * 2010-11-18 2011-06-29 刘忠军 一种高把持力骨螺钉

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5871486A (en) * 1993-01-21 1999-02-16 Acumed, Inc. Variable pitch bone screw
US6503252B2 (en) * 2001-02-21 2003-01-07 Henrik Hansson Bone screw, method for producing the threads thereof and drill for drilling holes therefor
US20080234760A1 (en) * 2007-03-23 2008-09-25 Zbigniew Matulaniec Bone screw apparatus and related methods of use
CN101972164A (zh) * 2010-11-18 2011-02-16 刘忠军 一种高把持力(高结合力)骨螺钉

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CN101972164B (zh) 2012-04-25

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