WO2019242300A1 - 防爆无头加压空心螺钉 - Google Patents

防爆无头加压空心螺钉 Download PDF

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Publication number
WO2019242300A1
WO2019242300A1 PCT/CN2019/070778 CN2019070778W WO2019242300A1 WO 2019242300 A1 WO2019242300 A1 WO 2019242300A1 CN 2019070778 W CN2019070778 W CN 2019070778W WO 2019242300 A1 WO2019242300 A1 WO 2019242300A1
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Prior art keywords
screw
tail
proof
explosion
burst
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PCT/CN2019/070778
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English (en)
French (fr)
Inventor
刘丽娜
王天星
潘兵辉
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创美得医疗器械（天津）有限公司
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Priority to EP19823325.6A priority Critical patent/EP3804645A4/en
Publication of WO2019242300A1 publication Critical patent/WO2019242300A1/zh

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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
    • A61B17/8625—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
    • A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
    • 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
    • A61B17/685—Elements to be fitted on the end of screws or wires, e.g. protective caps
    • 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
    • A61B17/8645—Headless screws, e.g. ligament interference screws
    • 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
    • A61B17/8635—Tips of screws
    • 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
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated

Definitions

  • the invention relates to the technical field of orthopedic medical instruments, and in particular to an explosion-proof headless compression hollow screw.
  • Fracture is one of the most common injuries. As the population ages more and more, the annual incidence of fractures gradually increases. Surgical surgery is a more effective treatment plan. With the continuous advancement of new surgical theories, people are aware of the soft tissues around the fracture. The degree of injury and ensuring a good blood supply to the bone tissue are equally important. Headless compression cannulated screws are a good way to reduce irritation to soft tissues.
  • the headless compression hollow screw in the prior art includes a screw head, a screw shank, a screw tail and a screw core hole.
  • a uniform continuous thread is provided on the outside of the screw, and the screw head is provided with a nail tip.
  • the hole tool drills the bone tissue and is screwed in by the nail tip guide screw, but the conventional headless compression hollow screw cannot effectively press, and it is easy to stimulate the soft tissue around the bone, which is difficult when the screw is screwed in. , And there is a risk of bone bursting due to the screw tail screw diameter becoming larger.
  • the technical problem to be solved by the present invention is to provide an explosion-proof headless compression hollow screw.
  • the explosion-proof headless compression hollow screw of the invention comprises a screw head, a screw rod portion, a screw tail portion and a screw core hole, and the screw core hole penetrates the screw head portion, the screw rod portion and the screw tail portion; the screw head portion, the screw rod portion and The outer surface of the screw tail is provided with a thread, and the pitch of the thread is reduced from the screw head to the screw tail.
  • the screw head is provided with a self-tapping groove.
  • the screw tail is provided with a hexagonal hole or a hexagonal flower-shaped hole. There are multiple pressure relief explosion-proof grooves on the threads.
  • the present invention can also adopt the following technical measures:
  • the pitch of the thread gradually decreases continuously from the screw head, the screw shank to the screw tail.
  • the thread pitch of the screw head to the tail gradually decreases, and the pressure is continuously increased during the screwing process, thereby obtaining a better compression effect;
  • the tapping slot replaces the nail tip with a self-tapping slot, which reduces the stimulation of soft tissues, and can achieve self-tapping and self-drilling of the screw. No other drilling tools are required during use.
  • a pressure relief explosion-proof slot at the end of the screw can make the screw turn. It is easier to insert, on the other hand, it also prevents the bone from bursting during the screwing process, which facilitates the operation and facilitates the patient's postoperative recovery.
  • Figure 1 is a front view of the explosion-proof headless compression hollow screw of the present invention
  • Fig. 2 is a left side view of the explosion-proof headless compression hollow screw of the present invention.
  • FIG. 3 is a right side view of the explosion-proof headless compression hollow screw of the present invention.
  • the explosion-proof headless hollow screw of the present invention includes a screw head portion 1, a screw rod portion 2, a screw tail portion 3, and a screw core hole 7, and the screw core hole passes through the screw head and the screw rod.
  • the screw tail so that the guide pin passing through the threaded core hole is accurately positioned during the operation; the outer surface of the screw head, the screw rod, and the screw tail is provided with a thread 4, and the pitch of the thread is from the screw head to the screw
  • the tail is reduced, that is, the screw pitch of the screw head is the largest.
  • Self-tapping slot 5 is set on the head of the screw to achieve self-tapping and self-drilling of the screw. Small-sized screws are no longer required for other drilling tools, and larger-sized screws can be drilled and replanted. But even in the case of drilling with a drill bit, the screw head with a self-tapping slot can make the screw easier to screw in, and the screw can be completely buried in the bone without negatively affecting the movement of the joint and reducing Soft around the bones Weaving stimulation effect; Hexagonal holes 8 or hexagonal hexagonal flower-shaped holes are provided at the tail of the screw. Hexagonal hexagonal or hexagonal flower-shaped holes can also achieve the same effect, and can be used to implant screws into bones in accordance with the actual shape.
  • the thread pitch of the thread gradually decreases from the screw head, the screw shank to the screw tail, so that the screw-in process and the pressurization process are performed uniformly, and the use is smoother.
  • Six pressure relief explosion-proof grooves are evenly arranged on the threads on the outer surface of the screw tail, and the setting position of the pressure relief explosion-proof grooves can correspond to the arrangement manner of the hexagon socket or hexagonal flower-shaped hole at the tail of the screw.

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  • 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)

Abstract

一种防爆无头加压空心螺钉，包括螺钉头部（1）、螺钉杆部（2）、螺钉尾部（3）和螺钉芯孔（7），螺钉芯孔（7）贯通螺钉头部（1）、螺钉杆部（2）和螺钉尾部（3）；螺钉头部（1）、螺钉杆部（2）和螺钉尾部（3）的外表面设有螺纹（4），且螺纹（4）的螺距由螺钉头部（1）至螺钉尾部（3）减小，螺钉头部（1）设置自攻槽（5），螺钉尾部（3）设有内六角孔（8）或内六角花形孔，且螺钉尾部（3）外表面的螺纹（4）上设置多个泄压防爆槽（6）。螺钉在旋入的过程中不断加压，从而得到了更好的加压效果；螺钉头部（1）设置自攻槽（5），以自攻槽（5）取代了钉尖，减少了对软组织的刺激，而且能够实现螺钉的自攻自钻，螺钉尾部（3）设置泄压防爆槽（6）一方面能够使螺钉旋入更加容易，另一方面也避免了旋入过程中的骨头爆裂，简便了手术操作，有利于患者术后恢复。

Description

防爆无头加压空心螺钉 技术领域
本发明涉及骨科医疗器械的技术领域，具体说是一种防爆无头加压空心螺钉。
背景技术
骨折是最常见的损伤之一，随着人口老龄化越发严重，骨折年发生率逐步上升，外科手术是比较有效的治疗方案，随着新的手术理论的不断提出，人们意识到骨折周围软组织的损伤程度及保证骨组织获得良好的血液供给同样重要，无头加压空心螺钉是一种减少对软组织刺激的良好方案。
现有技术中的无头加压空心螺钉，包括螺钉头部、螺钉杆部、螺钉尾部和螺钉芯孔，在螺钉的外部设置均匀的连续螺纹，螺钉头部设置钉尖，使用时由专用钻孔工具在骨组织上钻孔，再由钉尖引导螺钉旋入，但现有技术的无头加压空心螺钉无法起到有效加压，而且容易刺激骨周围的软组织，在螺钉旋入时困难，并存在螺钉尾部旋入直径变大而导致的骨头爆裂的风险。
发明内容
本发明要解决的技术问题是提供一种防爆无头加压空心螺钉。
本发明为解决公知技术中存在的技术问题所采取的技术方案是:
本发明的防爆无头加压空心螺钉，包括螺钉头部、螺钉杆部、螺钉尾部和螺钉芯孔，螺钉芯孔贯通螺钉头部、螺钉杆部和螺钉尾部；螺钉头部、螺钉杆部和螺钉尾部的外表面设有螺纹，且上述螺纹的螺距由螺钉头部至螺钉尾部减小，螺钉头部设置自攻槽，螺钉尾部设有内六角孔或内六角花形孔，且螺钉尾部外表面的螺纹上设置多个泄压防爆槽。
本发明还可以采用以下技术措施：
所述的螺纹的螺距由螺钉头部、螺钉杆部至螺钉尾部逐渐连续减小。
所述的螺钉尾部外表面的螺纹上均匀设置六个泄压防爆槽。
本发明具有的优点和积极效果是:
本发明的防爆无头加压空心螺钉中，螺钉头部至尾部的螺纹螺距逐渐减小，在螺钉旋入的过程中不断加压，从而得到了更好的加压效果；螺钉头部设置自攻槽，以自攻槽取代了钉尖，减少了对软组织的刺激，而且能够实现螺钉的自攻自钻，使用时无需其他钻孔工具，螺钉尾部设 置泄压防爆槽一方面能够使螺钉旋入更加容易，另一方面也避免了旋入过程中的骨头爆裂，简便了手术操作，有利于患者术后恢复。
附图说明
图1是本发明防爆无头加压空心螺钉的主视图；
图2是本发明防爆无头加压空心螺钉的左视图。
图3是本发明防爆无头加压空心螺钉的右视图。
具体实施方式
以下通过附图和具体实施例对本发明的技术方案进行详细说明。
如图1至图3所示，本发明的防爆无头加压空心螺钉，包括螺钉头部1、螺钉杆部2、螺钉尾部3和螺钉芯孔7，螺钉芯孔贯通螺钉头部、螺钉杆部和螺钉尾部，从而使穿过螺纹芯孔的导针在手术中定位精确；螺钉头部、螺钉杆部和螺钉尾部的外表面设有螺纹4，且上述螺纹的螺距由螺钉头部至螺钉尾部减小，即螺钉头部的螺距最大，在螺钉使用时，螺钉头部较大的螺距更加有利于螺钉的旋入，而螺钉尾部较小的螺距则更有利于与螺钉与骨组织的加压固定；在螺钉头部设置自攻槽5，可以实现螺钉的自攻自钻，小规格的螺钉旋入不再需要其它钻孔工具，而较大规格的螺钉可使用钻头钻孔后再植入，但即便是使用钻头钻孔的情况，带由自攻槽的螺钉头部一样能够使螺钉旋入更加容易，螺钉可完全埋在骨头中，不会对关节的活动产生负面影响，并减少对骨周边软组织刺激的效果；螺钉尾部设有内六角孔8或内六角花形孔，六角孔或六角花形孔同样能够实现相同的作用，能够配合器械将螺钉植入到骨中，具体的形状可以根据实际情况进行选择；在螺钉尾部外表面的螺纹上设置多个泄压防爆槽6，从而能够在尽量不减小螺钉轴向加压强度的前提下，减小了螺钉径向与骨组织之间的压力强度，使螺钉更加容易旋入，同时也避免了骨头爆裂带来的损伤。
螺纹的螺距由螺钉头部、螺钉杆部至螺钉尾部逐渐连续减小，从而使旋入进程和加压过程均匀进行，使用起来更加平顺。
螺钉尾部外表面的螺纹上均匀设置六个泄压防爆槽，泄压防爆槽的设置位置可以与螺钉尾部的内六角孔或内六角花形孔的设置方式相对应。
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例公开如上，然而，并非用以限定本发明,任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内,当然会利用揭示的技术内容作出些许更动或修饰，成为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容，依据本发明的技术 实质对以上实施例所作的任何简单修改、等同变化与修饰，均属于本发明技术方案的范围内。

Claims (3)

  1. 一种防爆无头加压空心螺钉，包括螺钉头部、螺钉杆部、螺钉尾部和螺钉芯孔，螺钉芯孔贯通螺钉头部、螺钉杆部和螺钉尾部；其特征在于：螺钉头部、螺钉杆部和螺钉尾部的外表面设有螺纹，且上述螺纹的螺距由螺钉头部至螺钉尾部减小，螺钉头部设置自攻槽，螺钉尾部设有内六角孔或内六角花形孔，且螺钉尾部外表面的螺纹上设置多个泄压防爆槽。
  2. 根据权利要求1所述的防爆无头加压空心螺钉，其特征在于：螺纹的螺距由螺钉头部、螺钉杆部至螺钉尾部逐渐连续减小。
  3. 根据权利要求1或2所述的防爆无头加压空心螺钉，其特征在于：螺钉尾部外表面的螺纹上均匀设置六个泄压防爆槽。
PCT/CN2019/070778 2018-06-08 2019-01-08 防爆无头加压空心螺钉 WO2019242300A1 (zh)

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EP19823325.6A EP3804645A4 (en) 2018-06-08 2019-01-08 ANTI-BURST HEADLESS COMPRESSION HOLLOW SCREW

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CN201810588522.6 2018-06-08
CN201810588522.6A CN108703796A (zh) 2018-06-08 2018-06-08 防爆无头加压空心螺钉

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CN108703796A (zh) * 2018-06-08 2018-10-26 创美得医疗器械（天津）有限公司 防爆无头加压空心螺钉

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