WO2014032522A1 - 用于接骨板的组合式锁定螺钉及包括其的接骨板系统 - Google Patents

用于接骨板的组合式锁定螺钉及包括其的接骨板系统 Download PDF

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Publication number
WO2014032522A1
WO2014032522A1 PCT/CN2013/081468 CN2013081468W WO2014032522A1 WO 2014032522 A1 WO2014032522 A1 WO 2014032522A1 CN 2013081468 W CN2013081468 W CN 2013081468W WO 2014032522 A1 WO2014032522 A1 WO 2014032522A1
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WIPO (PCT)
Prior art keywords
locking
screw
bone
bone plate
combination
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PCT/CN2013/081468
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English (en)
French (fr)
Inventor
高耀平
田芳
林忠
陈伟
Original Assignee
上海微创骨科医疗科技有限公司
苏州海欧斯医疗器械有限公司
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Publication of WO2014032522A1 publication Critical patent/WO2014032522A1/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
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
    • A61B17/862—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the periphery 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • 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
    • 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
    • A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone

Definitions

  • the present invention relates to medical device implants, and more particularly to locking screws and bone plate systems for use in orthopedic trauma treatment procedures. Background technique
  • the principle of fracture internal fixation is a comprehensive treatment based on accurate fracture anatomical reduction, stable fixation, preservation of bone as much as possible (blood supply), and early functional activity.
  • the common bone plate technique was used.
  • the conventional plate system does not have a structure that can be used for locking, so that the connection of the screw and the plate of the conventional plate system cannot be fixed. Therefore, the common plate system has biomechanical defects: compression of the periosteum, affecting the blood supply to the fracture end, which leads to a relatively high incidence of complications in traditional firm plate osteosynthesis, including infection, plate fracture, delayed healing and non-union .
  • a locking bone plate technique which relies on the taper thread on the bone plate hole and the taper thread of the locking screw head to create a locking effect.
  • the locking plate system does not rely on the friction between the bone-steel interface, thereby reducing the damage of the periosteum and retaining the blood supply of the bone as much as possible.
  • the stability of the locking plate system is maintained by the interface between the angled screw and the steel plate. Due to the stable integrity of the locking internal fixator, the locking force of the locking head screw is much higher than that of the ordinary screw, so the locking bone plate technology is currently used more and more in the market.
  • Chinese invention patent application CN2011 10003221.0 discloses a steel plate screw system with a universal locking screw, the system comprising a steel plate and at least two locking with a tapered cap Screw.
  • Chinese utility model patent CN201020132646.2 discloses a fixed bone locking steel plate device, which comprises a locking screw, a locking steel plate with a locking threaded hole, a first locking sleeve with an outer diameter corresponding to the head of the locking screw and an inner diameter slightly A second locking sleeve that is larger than the head of the locking screw.
  • Chinese utility model patent CN200920026695.5 discloses a proximal femoral locking plate internal fixation system, which comprises a locking plate and a locking screw.
  • the end edge of the locking plate is provided with a suture hole, and the thick hook is fixed on the suture hole by the fixing ring, and is locked.
  • the upper part of the plate is provided with a femoral neck locking nail hole, and the nail hole is screwed with a femoral neck locking nail.
  • locking screw of the locking plate system and the connection of the bone plate can be fixed, the axial resistance of the locking screw and the radial anti-rotation ability are not satisfactory.
  • locking bone plates are far more expensive than ordinary steel plates, and some fractures do not have to be treated with a locking bone plate.
  • the object of the present invention is to solve the problem that the connection of the screw and the bone plate of the common bone plate system cannot be fixed and the axial pull-out resistance and radial resistance of the locking screw after the locking screw of the locking plate system and the bone plate are connected.
  • the problem of insufficient rotation ability is provided.
  • a modular locking screw for a bone plate is provided, which is particularly suitable for a conventional bone plate system.
  • the locking screw includes a bone screw for inserting a human body and a locking member, and the bone screw is provided on its head with a through hole inclined at an angle with respect to a longitudinal axis thereof for the locking member to extend through, and the through hole
  • the aperture is provided with an engagement means on the inner wall of the aperture for engaging a corresponding engagement means on the locking member.
  • the engagement means of the bone screw and the engagement means of the locking member comprise threads and the locking member is a locking pin.
  • the angle of inclination of the through hole relative to the longitudinal axis of the bone screw is
  • the locking member may include a front end locking portion provided with the engaging means and a tail end portion connected to the front end locking portion and which is detachable.
  • the locking member is a locking pin
  • the front locking portion is a locking needle bar and the tail end portion is a tail
  • the locking needle bar is provided with a clamping groove at an end connected to the tail.
  • the head of the bone screw includes an inner plum to facilitate implantation and removal of the bone screw.
  • the head of the locking member includes a hexagon socket to facilitate implantation and removal of the locking member.
  • a bone plate system comprising a bone plate and one or more of the above-described combined locking screws.
  • Several combination locking screws can be selected depending on the patient's fracture.
  • the present invention can improve the conventional bone plate system by forming a common integral plate and a combination locking screw into a stable whole body by changing a conventional bone screw of the prior art into a combined locking screw by using a conventional bone plate.
  • the combined locking screw of the present invention avoids the inadequacy of the conventional bone plate system, achieves or exceeds the performance of the locking plate system, and is low in price and simple in operation.
  • picture- 1 is a view of a combination locking screw in accordance with an embodiment of the present invention.
  • FIG. 2 is a view of a conventional bone plate system in accordance with a combination locking screw of an embodiment of the present invention in which a locking screw has been inserted into a hole in a bone plate.
  • 3A-3C are front elevational, cross-sectional and perspective views, respectively, of a bone screw of a combined locking screw, in accordance with an embodiment of the present invention.
  • FIG. 4 is a perspective view of a locking pin of a combination locking screw in accordance with an embodiment of the present invention.
  • Figure 5 is a perspective view of a combination locking screw in accordance with another embodiment of the present invention.
  • Figure 6 is a perspective view of a locking pin of a combination locking screw in accordance with another embodiment of the present invention.
  • Figure 7 is a perspective view of a modular locking screw mounted in place in accordance with another embodiment of the present invention. List of reference signs
  • Figure 1 shows an assembled modular locking screw 1 comprising a bone screw 3 and a locking pin 2.
  • the bone screw 3 is shown in Figs. 3A-3C, and has an inner plum 5 on its head to facilitate implantation and removal of the bone screw 3. Further, the bone screw 3 is further provided with a slanted screw hole 6 penetrating the head on its head.
  • the angle a between the angled hole 6 and the longitudinal axis of the bone screw 3 is between 10° and 30°.
  • the diameter of the oblique screw hole is 2.5 to 6.0 mm.
  • the locking pin 2 is as shown in FIG. 4, which includes a locking shank 7 at the front end and a locking nail at the tail end.
  • the head 8, the locking shank 7 is for implantation into a human body, and the locking nail head 8 is provided with an external thread for engaging with the internal thread of the oblique screw hole 6 of the bone screw 3. Further, a hexagon socket 9 is provided on the trailing end of the locking nail 2 (i.e., the end where the locking nail head 8 is located) to facilitate the insertion and removal of the locking nail 2.
  • the locking nail head 8 on the locking nail 2 and the oblique screw hole 6 of the bone screw 3 are fixed by a double-ended threaded connection.
  • the bone screw 3 is first implanted into the human body according to the operation method of the common bone plate technique.
  • FIG. 1 shows a bone plate system comprising a combination locking screw 1 in which four locking screws 1 have been mounted into the holes of the bone plate 13.
  • the combination locking screw ⁇ includes a bone screw 3' and a locking needle 4.
  • the bone screw 3' is substantially the same as the bone screw 3 of the embodiment 1.
  • the oblique screw hole has a diameter of 2.5 to 10 mm, and the angle is the same as that in the first embodiment.
  • the needle 4 is locked.
  • the locking needle 4 includes a locking needle bar 12 at the front end for implantation into a human body, and a breakable tail 10. Further, the lock needle bar 12 is provided with a grip groove 11 at one end connected to the tail fin 10.
  • the locking needle 4 is implanted into the human body along the oblique screw hole 6 on the bone screw 3. After being implanted in place, the tail 10 is broken, leaving only the locking needle bar 12 provided with the clamping groove 1 1 as shown in FIG.
  • the locking needle 4 is implanted by gripping the empennage 10 by a gripping tool (not shown); when taking out, the locking needle rod is taken out by gripping the clamping groove 1 1 by the gripping tool with the empennage 10 broken. 12.
  • the combined locking screw of the present invention can be used independently of the AO standard bone plate and screw technology, the principle of using the inner fixing bracket separately, and the combination of the two methods. Therefore, the present invention achieves the best clinical results for the treatment of any fracture.

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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)
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Abstract

一种用于接骨板的组合式锁定螺钉（1，1'）和包括其的接骨板系统，其特别适合于普通接骨板。锁定螺钉（1，1'）包括用于植入人体的接骨螺钉（3）和锁定部件（2）。接骨螺钉（3）在头部上设有相对于其纵向轴线倾斜一角度的贯穿孔（6），以供锁定部件（2）延伸穿过。贯穿孔（6）在孔内壁上设有接合装置，用于接合锁定部件（2）上的相应的接合装置。本组合式锁定螺钉的性能达到甚至超过了锁定钢板系统，且价格低、手术操作简便。

Description

用于接骨板的组合式锁定螺钉及包括其的接骨板系统 技术领域
本发明涉及医疗器械植入物， 具体涉及骨科创伤治疗手术中使用 的锁定螺钉和接骨板系统。 背景技术
骨折外科手术治疗的目的是为了重建解剖和恢复功能。 按照 AO
(ASIF ) 的原则， 骨折内固定是一种建立于精确的骨折解剖复位、 稳 定的固定、 尽可能保留骨的血运 （血液供应） 、 早期功能性活动的基 础上的综合治疗方法。 骨折内固定早期釆用的是普通接骨板技术。 但是， 普通接骨板系 统没有可用于锁定的结构， 使得普通接骨板系统的螺钉和接骨板的连 接不能形成固定。 所以， 普通接骨板系统存在生物力学缺陷： 压迫骨 膜、 影响骨折端血液供应， 这导致传统的牢固固定的钢板接骨术具有 相当高的并发症发生率， 包括感染、 钢板断裂、 延迟愈合及不愈合。 近年来发展了锁定接骨板技术， 其依靠接骨板孔上的锥螺紋和锁 定螺钉头部锥螺紋的连接来产生锁定效果的。 锁定接骨板系统不依赖 骨 -钢板界面之间的摩擦力， 从而降低了骨膜的损伤， 尽可能多地保留 了骨的血运。 锁定接骨板系统的稳定性靠具有角度稳定的螺钉与钢板 之间的界面维持。 由于这种锁定内固定器具有稳定的整体性， 其锁定 头的螺钉的抗拔出力较普通螺钉高出很多， 因此目前锁定接骨板技术 在市场上的运用越来越多。 中国发明专利申请 CN2011 10003221.0 公开一种具有万向锁定螺 钉的钢板螺钉系统， 该系统包括钢板和至少两根具有锥形钉帽的锁定 螺钉。 中国实用新型专利 CN201020132646.2 公开一种固定骨骼的锁定 钢板装置， 其包括锁定螺钉、 开设有锁定螺纹孔的锁定钢板、 外径与 锁定螺钉的头部相一致的第一锁定套筒和内径略大于锁定螺钉的头部 的第二锁定套筒。 中国实用新型专利 CN200920026695.5 公开一种股骨近端锁定板 内固定系统， 其结构包括锁定板、 锁定螺钉， 锁定板上端边缘开有缝 合孔， 粗隆钩通过固定环固定在缝合孔上， 锁定板上部开有股骨颈锁 定钉孔， 钉孔通过螺纹固定有股骨颈锁定钉。 不过， 锁定接骨板系统的锁定螺钉和接骨板的连接虽然可以形成 固定， 但锁定螺钉轴向的抗拔出能力和径向抗旋转能力不理想。 而且， 锁定接骨板较普通钢板远为昂贵， 有些骨折也不必用锁定接骨板进行 治疗。 另外， 手术中很难利用锁定接骨板来对骨折进行充分复位， 尤 其是只有锁定孔的特殊钢板。 在此情形中， 在钢板固定以前， 必须先 将骨折端复位。 一旦锁定螺钉透过钢板打入骨端， 骨端就不能通过打 入另外螺钉或使用加压装置等方式来调整位置。 发明内容
本发明的目的是解决普通接骨板系统的螺钉和接骨板的连接不能 形成固定的问题以及锁定接骨板系统的锁定螺钉和接骨板的连接之后 的锁定螺钉轴向的抗拔出能力和径向抗旋转能力不足的问题。 根据本发明的第一方面，提供一种用于接骨板的组合式锁定螺钉， 特别适合于普通接骨板系统。 所述锁定螺钉包括用于植入人体的接骨 螺钉和锁定部件， 接骨螺钉在其头部上设置有相对于其纵向轴线倾斜 一角度的贯穿孔， 以供锁定部件延伸穿过， 且所述贯穿孔在孔内壁上 设有接合装置， 用于接合锁定部件上的相应的接合装置。 在本发明的 实施例中， 接骨螺钉的接合装置和锁定部件的接合装置包括螺紋， 锁 定部件为锁定钉。 根据本发明， 贯穿孔相对于接骨螺钉的纵向轴线倾斜的角度在
10°-30°之间。 根据本发明的实施例， 锁定部件可以包括设有接合装置的前端锁 定部分和连接于前端锁定部分且可折断的尾端部分。 在本发明的实施 例中， 锁定部件为锁定针， 而前端锁定部分为锁定针杆， 尾端部分则 为尾翼， 且锁定针杆在与尾翼相连接的一端上设有夹持槽。 在此情况 下， 在植入时， 通过夹持工具夹住尾翼来植入锁定针， 而在取出时， 在尾翼折断的情况下通过夹持工具夹住夹持槽来取出锁定针杆。 根据本发明的另一实施例， 接骨螺钉的头部包括内梅花， 以便于 植入和取出接骨螺钉。 同样， 锁定部件的头部包括内六角， 以便于植 入和取出锁定部件。 根据本发明的第二方面， 提供一种接骨板系统， 其包括接骨板和 一个或多个上述的组合式锁定螺钉。 可以根据患者的骨折情况选择使 用几个组合式锁定螺钉。 本发明可以在采用普通接骨板的情况下通过将现有技术中的普通 接骨螺钉改变成组合式锁定螺钉而使普通接骨板与组合式锁定螺钉形 成稳定的整体， 改进了普通接骨板系统。 本发明的组合式锁定螺钉避 免了普通接骨板系统不足之处， 性能上达到甚至超过锁定钢板系统， 而且价格低， 手术操作简单。 附图说明
通过下面参照附图对本发明实施例进行的详细描述， 本发明的特 征及其优点将是显而易见的。 在图中- 图 1是根据本发明实施例的组合式锁定螺钉的视图。
图 2是根据具有本发明实施例的组合式锁定螺钉的普通接骨板系 统视图， 其中锁定螺钉已装入接骨板的孔内。
图 3A-3C分别是根据本发明实施例的组合式锁定螺钉的接骨螺钉 的正视图、 沿线 A-A的剖面图和透视图。
图 4是根据本发明实施例的组合式锁定螺钉的锁定钉的透视图。 图 5是根据本发明另一实施例的组合式锁定螺钉的透视图。
图 6是根据本发明另一实施例的组合式锁定螺钉的锁定针的透视 图。
图 7是根据本发明另一实施例的组合式锁定螺钉安装就位后的透 视图。 附图标记列表
1、 组合式锁定螺钉 2、 锁定钉 3、 接骨螺钉
Γ、 组合式锁定螺钉 3，、 接骨螺钉 4、 锁定针
5、 内梅花 6、 斜螺孔 7、 锁定钉杆
8、 锁定钉头 9、 内六角 10、 尾翼
1 1、 夹持槽 12、 锁定针杆 13、 接骨钢板 具体实施方式
下面参照附图描述本发明的实施例。 实施例 1
图 1 显示了组装成一体的组合式锁定螺钉 1， 其包括接骨螺钉 3 和锁定钉 2。 接骨螺钉 3如图 3A-3C所示， 在其头部上设有内梅花 5， 以便于植入和取出接骨螺钉 3。 此外， 接骨螺钉 3在其头部上还设有贯 穿头部的斜螺孔 6。 在本例中， 斜螺孔 6与接骨螺钉 3的纵向轴线夹角 a在 10° -30 ° 之间。 斜螺孔直径为 2.5〜6.0mm。 锁定钉 2如图 4所示， 其包括前端的锁定钉杆 7和尾端的锁定钉 头 8， 锁定钉杆 7用于植入人体内， 锁定钉头 8上设有外螺纹， 以与接 骨螺钉 3 的斜螺孔 6的内螺紋接合。 此外， 在锁定钉 2的尾端 （即， 锁定钉头 8所在的一端）上设有内六角 9， 以便于植入和取出锁定钉 2。 在本例中， 锁定钉 2上的锁定钉头 8与接骨螺钉 3的斜螺孔 6以双头 螺纹连接固定。 手术时，先将接骨螺钉 3按普通接骨板技术的操作方法植入人体。 然后， 根据患者骨折情况选择增加一个或多个锁定钉 2， 将锁定钉 2沿 着接骨螺钉 3上的斜螺孔 6植入人体， 直至锁定钉 2上的锁定钉头 8 全部埋入接骨螺钉 3的内梅花 5中。图 2显示了包括组合式锁定螺钉 1 的接骨板系统， 其中 4个锁定螺钉 1 已安装到接骨板 13的孔内。 实施例 2
如图 5所示， 组合式锁定螺钉 Γ包括接骨螺钉 3'和锁定针 4。 接 骨螺钉 3 '与实施例 1 的接骨螺钉 3基本相同。 在本例中， 斜螺孔直径 2.5〜10mm， 夹角与实施例 1中的相同。 实施例 2与实施例 1的区别在于锁定针 4。 如图 6所示， 锁定针 4 包括前端的锁定针杆 12， 用于植入人体内， 和可折断的尾翼 10。此外， 锁定针杆 12在与尾翼 10相连接的一端上设有夹持槽 1 1。 手术时， 将锁定针 4沿着接骨螺钉 3上的斜螺孔 6植入人体。 植 入到位后， 折断尾翼 10， 仅留下设有夹持槽 1 1的锁定针杆 12， 如图 7 所示。 植入时， 通过夹持工具 （未示出）夹住尾翼 10来植入锁定针 4; 取出时， 在尾翼 10折断的情况下通过夹持工具夹住夹持槽 1 1 来取出 锁定针杆 12。 本发明的组合式锁定螺钉既能单独地运用 AO标准的接骨板和螺 丝钉技术、 也能单独地运用内固定支架的原则、 还能将两种方法的结 合使用。 因此， 本发明对任何骨折的治疗都能取得最好的临床效果。 本领域技术人员可以理解， 以上描述只是示例性的。 在不背离本 发明的思想和范围的情况下， 本领域技术人员可以对本发明作出多种 修改和变化。

Claims

权 利 要 求 书
1. 一种用于接骨板的组合式锁定螺钉， 其特征在于， 所述锁定螺 钉包括用于植入人体的接骨螺钉和锁定部件， 接骨螺钉在其头部上设 置有相对于其纵向轴线倾斜一角度的贯穿孔， 以供锁定部件延伸穿过， 且所述贯穿孔在孔内壁上设有第一接合装置， 用于接合锁定部件上的 相应的第二接合装置。
2. 权利要求 1 所述的组合式锁定螺钉， 其中所述角度在 10°-30° 之间。
3. 权利要求 1或 2所述的组合式锁定螺钉， 其中所述接骨螺钉的 第一接合装置和所述锁定部件的第二接合装置包括螺紋。
4. 权利要求 1或 2所述的组合式锁定螺钉， 其中所述锁定部件包 括设有所述第二接合装置的前端锁定部分和连接于前端锁定部分且可 折断的尾端部分。
5. 权利要求 4所述的组合式锁定螺钉， 其中所述前端锁定部分在 与尾端部分相连接的一端上设有夹持槽。
6. 权利要求 1或 2所述的组合式锁定螺钉， 其中接骨板为普通接 骨板。
7. 一种接骨板系统， 其包括接骨板和一个或多个权利要求 1-6中 任一项的组合式锁定螺钉。
PCT/CN2013/081468 2012-08-30 2013-08-14 用于接骨板的组合式锁定螺钉及包括其的接骨板系统 WO2014032522A1 (zh)

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