WO2012075827A1 - 一种万向椎弓根螺钉 - Google Patents

一种万向椎弓根螺钉 Download PDF

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Publication number
WO2012075827A1
WO2012075827A1 PCT/CN2011/078277 CN2011078277W WO2012075827A1 WO 2012075827 A1 WO2012075827 A1 WO 2012075827A1 CN 2011078277 W CN2011078277 W CN 2011078277W WO 2012075827 A1 WO2012075827 A1 WO 2012075827A1
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WO
WIPO (PCT)
Prior art keywords
screw
spherical structure
pressure ring
universal
screw head
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Application number
PCT/CN2011/078277
Other languages
English (en)
French (fr)
Inventor
金航军
向勇刚
吕振杰
黄加春
杨天兵
刘道志
Original Assignee
上海微创骨科医疗科技有限公司
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Application filed by 上海微创骨科医疗科技有限公司 filed Critical 上海微创骨科医疗科技有限公司
Publication of WO2012075827A1 publication Critical patent/WO2012075827A1/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
    • A61B17/70—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
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped

Definitions

  • the present application relates to the field of medical devices, and in particular to a universal push screw. Background technique
  • spinal injury is usually treated by the spinal internal fixation system, and in the spinal internal fixation system, the push screw is embedded and fixed on the ridge push bone, which is an indispensable part of the spinal internal fixation system.
  • the common push screw is mainly divided into two types according to whether the screw head can rotate: the directional push screw and the universal push screw.
  • the universal push screw Compared with the directional push screw, the universal push screw has the advantages of clinical operation, strong applicability, and is widely used.
  • the push-bone screw is used as an implant, it is not suitable for the universal function by means of welding, riveting, etc., so the existing universal push-bone screw ⁇ uses the structure of the elastic snap ring to realize the universal function.
  • Figure 1 is a schematic view of the structure of the existing universal push screw
  • Figure 2 is the exploded view of Figure 1, as shown in Figure 1 and Figure 2
  • 1 is a screw seat
  • 2 is a screw head
  • 3 is an elastic collar
  • 4 For the washer, in the installation, first place the washer 4 in the screw seat 1, and then place the spherical structure of the screw head 2 in the screw seat 1, and then fix the spherical structure in the screw seat 1 with the elastic clip 3,
  • the screw head 2 can be rotated with a spherical structure as a fixed point to realize a universal function.
  • the elastic card used to fix the spherical structure of the screw head the strength of the screw head extraction depends on the elastic strength of the elastic collar, and is affected by the elastic strength of the elastic collar. After being implanted in the body, the screw head often loosens, affecting the stability of the spinal fixation system. Summary of the invention
  • the embodiment of the present application provides a universal push screw to solve the problem that the strength of the elastic ring is low due to the strength of the elastic collar, thereby causing the screw head to loosen easily. as follows:
  • a universal push screw comprising: a screw seat, a screw head and a pressure ring, among them:
  • the screw seat is a tubular structure, and one end side wall is provided with two symmetrical U-shaped openings, and the other end opening is provided with a rib on the inner wall, and the inner wall of the screw seat is provided with a latching groove;
  • the screw head includes a rod body and a spherical structure fixed at one end of the rod body, and the rod body is provided with a thread, and the spherical structure is located in the screw seat, and is in contact with the inner side of the rib. And the outer diameter thereof is larger than the inner diameter of the rib, and the rod is located outside the screw 4;
  • An outer wall of one end of the pressure ring is provided with two symmetrical protrusions, and the protrusion is disposed in the card slot, the pressure ring is in contact with the spherical structure, and an inner diameter thereof is larger than the The outer diameter of the spherical structure on the screw head rotatably fixes the spherical structure on the screw head between the latching groove and the rib.
  • the card slot is disposed on an inner wall of the screw seat between the top of the U-shaped opening and the bottom of the U-shaped opening.
  • the structure in which the pressure ring is in contact with the spherical structure at one end is an arc structure.
  • the end surface of the pressure ring provided with one end of the bump is further provided with two symmetrical V-shaped expansion grooves.
  • the axes of the two V-shaped expansion grooves are in a straight line and are perpendicular to the line connecting the two protrusions.
  • the top end of the screw head spherical structure is provided with an inner hexagonal groove.
  • the universal push screw provided by the embodiment of the present application has a rib with a rib and a screw head at one end of the screw seat, and the shank of the screw seat is inserted into the screw seat from the other end of the screw seat.
  • the ball-shaped structure on the screw head is clamped in the screw seat, the pressure ring is arranged in the latching groove inside the screw seat, and the pressure ring is expanded under the action of external pressure, fixed in the card slot and the ball head is spherical
  • the structure is fixed in the screw seat.
  • the elastic cassette has a considerable requirement for material elasticity, and currently the implant screw is usually used.
  • the elastic properties of titanium alloys such as Ti6A14V and Ti6A17Nb are difficult to meet the elastic requirements of the ring making, and the material of the screw seat and the screw head is different because the material is made of the Ti-Ni alloy with better elasticity.
  • titanium alloys such as Ti6A14V and Ti6A17Nb are difficult to meet the elastic requirements of the ring making, and the material of the screw seat and the screw head is different because the material is made of the Ti-Ni alloy with better elasticity.
  • electrical corrosion due to different materials, which affects the quality and service life of the push screws.
  • the pressure ring is expanded under the action of external pressure and fixed in the locking groove in the screw seat, so the material of the pressure ring does not need elastic strength, and the pressure ring can be selected.
  • the same material as the screw seat and the screw head can also avoid the problem that the quality and service life of the push screw are affected by the electrical corrosion after the existing universal push screw is implanted into the body.
  • Figure 1 is a schematic view showing the structure of a conventional universal push screw
  • Figure 2 is an exploded view of Figure 1;
  • FIG. 3 is a cross-sectional structural view of a universal push screw according to an embodiment of the present application;
  • FIG. 4 is an exploded view of FIG. 3;
  • FIG. 5 is a schematic structural diagram of a screw seat provided by an embodiment of the present application.
  • FIG. 6 is a cross-sectional structural view of a screw seat provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural view of a pressure ring provided by an embodiment of the present application.
  • Figure 8 is a side view of a pressure ring provided by an embodiment of the present application.
  • Figure 9 is a bottom view of Figure 8.
  • FIG. 10 is a schematic structural view of a pressure ring provided in an embodiment of the present application. detailed description
  • FIG. 3 is a cross-sectional structural view of a universal push screw according to an embodiment of the present application.
  • Figure 4 is an exploded view of Figure 3.
  • the universal push screw includes: a screw seat 1, a screw head 2 and a pressure ring 5, wherein the screw head 2 is disposed inside the screw seat 1, and the pressure ring 5 is located at the screw The interior of the seat 1.
  • FIG. 5 is a schematic structural diagram of a screw seat provided by an embodiment of the present application.
  • FIG. 6 is a cross-sectional structural view of a screw seat provided by an embodiment of the present application.
  • the screw seat 1 has a tubular structure, and two U-shaped openings 11 are disposed on one end side wall of the opening, and the two U-shaped openings 11 are symmetrically distributed with the center of the tubular structure as a center of symmetry.
  • the inner wall of the other end opening of the 1 is provided with a rib 12, and the inner diameter of the rib 12 is smaller than the inner diameter of the screw seat 1.
  • the card slot 13 is an annular card slot which is disposed on the inner wall of the screw seat between the top of the U-shaped opening 11 and the bottom of the U-shaped opening 11, preferably at the bottom position of the U-shaped opening 11.
  • the inner diameter of the screw 4 can be uniformly uniform, or the diameter of the end portion from the end where the U-shaped opening 11 is provided to the rib 12 is gradually reduced.
  • a plurality of gimbal grooves 14 may be provided on the end surface of the screw seat 1 at which one end of the rib 12 is provided.
  • the number of the universal grooves 14 is three, and by providing the universal groove 14, the deflection angle between the screw seat 1 and the screw head 2 can be increased, thereby expanding the universal steering range.
  • two symmetrical through holes 15 may be provided in the wall of the pressure ring 5 between the two U-shaped openings 11.
  • the screw head 2 includes a rod body 20 and a spherical structure 21 fixed to the end of the rod body 20, and the rod body 20 is further provided with a thread for stably fixing the spherical structure 21 to the human body ridge.
  • the outer diameter of the spherical structure 21 of the screw head 2 is larger than the inner diameter of the rib 12, and the spherical structure 21 is located in the screw seat 1 and is in contact with the inner side of the rib 12.
  • the other end of the rod 20 is located outside the screw seat 1.
  • the outer diameter of the spherical structure 21 is also smaller than the inner diameter of the screw seat 1, such that at the time of mounting, the other end of the rod body 20 is penetrated by one end of the screw seat 1 provided with the U-shaped opening 11, and the spherical structure 21 and the rib 12 are provided. Contact with each other.
  • the top end of the spherical structure 21 of the screw head 2 is further provided with an inner hexagonal groove 22 for implanting the universal screw head into the human spine by a tool.
  • FIG. 7 is a schematic structural diagram of a pressure ring provided by an embodiment of the present application.
  • Figure 8 is an embodiment of the present application Side view of the pressure ring supplied.
  • Figure 9 is a bottom view of Figure 8.
  • two outer ribs 51 are disposed on the outer wall of the pressure ring, and the outer diameter of the pressure ring 5 is smaller than the inner diameter of the screw seat 1, and two symmetrical bumps. The farthest distance is greater than the inner diameter of the screw seat 1 and smaller than the inner diameter of the card slot 13.
  • the bump 51 on the pressure ring 5 is located in the latching slot 13, and one end away from the bump 51 is in contact with the spherical structure 21 of the screw head 2, and the spherical structure 21 is rotatably fixed to the latching slot 13 and the rib 12
  • the structure in which the end of the pressure ring 5 is in contact with the spherical structure 21 is an arc structure.
  • the end surface of the pressure ring 5 provided with the bump 51 is further provided with two symmetrical V-shaped expansion grooves 52, and the axes of the two V-shaped expansion grooves 52 are in a straight line, and The connecting lines of the two bumps 51 are perpendicular to each other, and when the pressure ring 5 is mounted in position, the end of the V-shaped expansion groove 52 is expanded by an external force, so that the pressure ring 5 is fixed in the latching groove 13.
  • Fig. 6 is an expansion tool, and the expansion tool 6 is used to apply pressure F to the two V-shaped expansion grooves 52, and the pressure F is divided into two component forces F1 and F2, respectively, and acts on the V-shaped expansion.
  • the rod 20 on the screw head 2 is inserted through the end of the screw seat 1 with the U-shaped opening 11, and the spherical structure 21 and the rib 12 on the screw head 2 are inserted. Contact. Then, the two bumps 51 on the pressure ring 5 are respectively caught in the two U-shaped openings 11, and the pressure ring 5 is pushed into contact with the spherical structure 21 of the screw head 2, and at this time, the two on the pressure ring 5 The bumps 51 reach the latching slots 13, and the press ring 5 is rotated to make the axes of the two V-shaped expansion slots 52 parallel to the two U-shaped openings 11.
  • the universal push screw provided by the embodiment of the present application has a rib with a rib and a screw head at one end of the screw seat, and the shank of the screw seat is inserted into the screw seat from the other end of the screw seat.
  • the ball-shaped structure on the screw head is clamped in the screw seat, the pressure ring is disposed in the card slot inside the screw seat, and the pressure ring is expanded under the action of external pressure, fixed in the card slot and the screw head is fixed
  • the spherical structure is fixed in the screw seat.
  • the rib on the screw seat catches the spherical structure of the screw head in the screw seat, and the screw head is pulled out because the screw seat does not elastically deform.
  • the strength is large, which avoids the problem that the existing universal push screw is weak due to the strength of the elastic collar, and the screw head is pulled out, which leads to easy looseness of the screw head.
  • the elastic card has considerable requirements on the material elasticity.
  • the elastic properties of the titanium alloy such as Ti6A14V and Ti6A17Nb, which are usually used for implant screws, are difficult to meet the elastic requirements of the ring making, and the Ti with better elasticity is used.
  • -M alloy is made of a collar, because the material is different from the material of the screw seat and the screw head, but when the two different materials are fixed together as an implant, in the human body fluid environment, the material will be different. There is a possibility of causing electrical corrosion, which affects the quality and service life of the push screw.
  • the pressure ring is expanded under the action of external pressure, and is fixed in the card slot in the screw seat, so the material of the pressure ring does not need elastic strength, and The same material as the screw seat and the screw head is selected, so that the problem of the quality and service life of the push screw can be avoided due to electrical corrosion of the existing universal push screw.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
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Description

说 明 书
一种万向推弓根螺钉
技术领域
本申请涉及医疗器械领域， 特别是涉及一种万向推弓根螺钉。 背景技术
在临床通常采用脊柱内固定系统对脊柱损伤进行治疗， 而在脊柱内固定 系统中推弓根螺钉嵌置固定在脊推骨上， 是脊柱内固定系统中不可或缺的部 分。
目前常见的推弓根螺钉根据螺釘头是否能够转动， 主要分为两类： 定向 推弓根螺钉和万向推弓根螺钉。 与定向推弓根螺钉相比， 万向推弓根螺钉具 有临床操作筒单、 可适用性强等优点， 使用比较广泛。 但由于推弓根螺钉作 为植入物， 不适合采用焊接、 铆接等手段实现万向功能， 所以现有的万向推 弓根螺钉釆用弹性卡圈的结构来实现万向功能。 图 1 为现有万向推弓根螺钉 的结构示意图， 图 2为图 1的爆炸图， 如图 1和图 2所示， 1为螺钉座， 2为 螺钉头， 3为弹性卡圈， 4为垫圈， 在安装时， 首先将垫圈 4放置在螺钉座 1 内， 再将螺钉头 2的球状结构置于螺钉座 1 内， 然后再用弹性卡圏 3将球状 结构固定在螺釘座 1 内， 这样螺钉头 2就可以以球状结构为固定点而转动， 实现万向功能。
通过对现有技术的研究， 申请人发现： 采用的弹性卡圏对螺钉头的球状 结构进行固定， 其螺钉头拔出强度取决于弹性卡圈的弹性强度， 受弹性卡圈 的弹性强度的影响， 在植入体内后， 螺钉头常常会出现松动， 影响脊柱内固 定系统的稳定性。 发明内容
为解决上述技术问题， 本申请实施例提供一种万向推弓根螺钉， 以解决 由于弹性卡圈强度的原因， 而导致螺钉头拔出强度低， 进而导致螺钉头容易 松动的问题， 技术方案如下：
一种万向推弓根螺钉， 包括： 螺钉座、 螺钉头和压环， 其中：
所述螺钉座为管状结构， 其一端侧壁上设置有两个相对称 U型开口， 另 一端开口处内壁上设置有凸棱， 并且所述螺钉座内壁上设置有卡位槽；
所述螺钉头包括棒体和固定在所述棒体一端的球状结构， 且所述棒体上 设置有螺紋， 所述球状结构位于所述螺钉座内， 与所述凸棱的内侧相接触， 并且其外径大于所述凸棱的内径， 所述棒体位于所述螺 4丁座的外侧；
所述压环的一端外壁上设置有两个相对称的凸块， 且所述凸块设置在所 述卡位槽内， 所述压环与所述球状结构相接触， 且其内径大于所述螺钉头上 球状结构的外径， 将所述螺钉头上的球状结构可转动地固定在所述卡位槽与 凸棱之间。
优选地， 所述卡位槽设置在所述 U型开口顶部与 U型开口底部之间的螺 訂座的内壁上。
优选地， 所述压环与所述球状结构相接触一端的结构为弧形结构。
优选地， 所述压环设置有凸块一端的端面上还设置有两个相对称的 V型 扩张槽。
优选地， 所述两个 V型扩张槽的轴线在一条直线上， 且与所述两个凸块 的连线相垂直。
优选地， 所述螺钉头球状结构顶端设置有内六角形槽。
优选地， 所述螺 丁座上设置有凸棱的一端的断面上设置有多个万向槽。 由以上技术方案可见， 本申请实施例提供的万向推弓根螺钉， 螺钉座的 一端设置有凸棱、 螺钉头的棒体从螺钉座的另一端穿入螺钉座， 螺钉座上的 凸棱将螺钉头上的球状结构卡在螺钉座内， 压环设置在螺钉座内部的卡位槽 内， 并且压环在外界压力的作用下进行扩张， 固定在卡位槽内并将螺钉头的 球状结构固定在螺钉座内。 该万向推弓根螺钉中， 当向外拔螺钉头时， 螺钉 座上的凸棱将螺钉头的球状结构卡在螺钉座内， 由于螺钉座不会发生弹性形 变， 所以螺钉头的拔出强度大， 避免了现有的万向推弓根螺钉由于弹性卡圈 强度的原因， 而导致螺钉头拔出强度低， 进而导致螺钉头容易松动的问题。
此外， 弹性卡圏对材料弹性要相当的要求， 而目前植入物螺钉通常采用 的 Ti6A14V及 Ti6A17Nb等植入级别钛合金的弹性性能难以满足卡圈制作的弹 性要求， 而采用弹性较好的 Ti-Ni合金制作卡圈的话， 由于其材料与螺钉座及 螺钉头的材料不相同， 但当两种不同材料固定在一起作为植入物植入后， 在 人体体液的环境中， 会由于材料不同而存在产生电腐蚀的可能性， 影响推弓 根螺钉的质量及使用寿命。 而本申请实施例提供的万向推弓根螺钉中， 压环 是在外界压力的作用下扩张后， 固定在螺钉座内的卡位槽内， 所以压环的材 料不需要弹性强度， 可以选择与螺钉座及螺钉头相同的材料， 因此还可以避 免现有万向推弓根螺钉植入体内后由于电腐蚀而影响推弓根螺钉的质量及使 用寿命的问题。 附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案， 下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍， 显而易见地， 下面 描述中的附图仅仅是本申请中记载的一些实施例， 对于本领域普通技术人员 来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1为现有的万向推弓根螺釘的结构示意图；
图 2为图 1的爆炸图；
图 3为本申请实施例提供的万向推弓根螺釘的剖视结构示意图； 图 4为图 3的爆炸图；
图 5为本申请实施例提供的螺钉座的结构示意图；
图 6为本申请实施例提供的螺釘座的剖视结构示意图；
图 7为本申请实施例提供的压环的结构示意图；
图 8为本申请实施例提供的压环的侧视图；
图 9为图 8的仰视图。
图 10为本申请实施例提供的压环在组装时的结构示意图。 具体实施方式
为了使本技术领域的人员更好地理解本申请中的技术方案， 下面将结合 本申请实施例中的附图， 对本申请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申请一部分实施例， 而不是全部的实施 例。 基于本申请中的实施例， 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， 都应当属于本申请保护的范围。 图 3为本申请实施例提供的万向推弓根螺钉的剖视结构示意图。 图 4为 图 3的爆炸图。
如图 3和图 4所示， 该万向推弓根螺钉包括： 螺钉座 1、 螺钉头 2和压环 5 , 螺钉头 2—端设置在螺钉座 1内部， 压环 5位于在所述螺钉座 1的内部。
图 5为本申请实施例提供的螺钉座的结构示意图。 图 6为本申请实施例 提供的螺钉座的剖视结构示意图。 如图 5所示， 螺钉座 1 为管状结构， 在其 一端开口侧壁上设置有两个 U型开口 11， 并且两个 U型开口 11以管状结构 的中心为对称中心对称分布， 在螺钉座 1 的另一端开口处内壁上设置有凸棱 12, 并且凸棱 12的内径小于螺钉座 1的内径。 卡位槽 13为环形卡位槽， 设 置在 U型开口 11顶部与 U型开口 11底部之间的螺钉座的内壁上，优选位置 在 U型开口 11的底部位置处。 本申请实施例中， 螺 4丁座 1的内径可以均匀一 致， 也可以为从设置有 U型开口 11的一端至设置有凸棱 12—端直径逐渐减 小。 此外， 如图 5所示， 在螺钉座 1设置有凸棱 12的一端的端面上还可以设 置有多个万向槽 14。 在本申请实施例中， 万向槽 14的个数为 3个， 通过设置 万向槽 14， 可以增加螺钉座 1与螺钉头 2之间的偏转角度， 进而扩大万向转 向范围。 如图 4所示， 在两个 U型开口 11之间的压环 5的壁上还可以设置有 两个相对称的通孔 15。
如图 4所示，螺钉头 2包括棒体 20和固定在棒体 20—端的球状结构 21 , , 并且棒体 20上还设置有螺紋， 用于将球状结构 21稳定的固定于人体脊推上。 螺钉头 2的球状结构 21的外径大于凸棱 12的内径， 球状结构 21位于螺钉座 1内， 并且与凸棱 12的内侧相接触。 棒体 20的另一端位于螺钉座 1的外侧。 球状结构 21的外径还小于螺钉座 1的内径， 这样在安装时， 棒体 20的另一 端由螺钉座 1上设置有 U型开口 11的一端穿入， 并使球状结构 21与凸棱 12 相接触接触。 本申请实施例中， 如图 4所示， 螺钉头 2的球状结构 21顶端还 设置有内六角形凹槽 22, 用于通过工具将万向螺钉头植入人体脊推。
图 7为本申请实施例提供的压环的结构示意图。 图 8为本申请实施例提 供的压环的侧视图。 图 9为图 8的仰视图。
如图 7、 图 8和图 9所示， 压环 5—端外壁上设置有两个相对称的凸块 51 , 并且压环 5的外径小于螺钉座 1 的内径， 两个相对称凸块的最远距离大 于螺钉座 1的内径且小于卡位槽 13的内径。 压环 5上的凸块 51位于卡位槽 13内 , 并且远离凸块 51的一端与螺钉头 2的球状结构 21相接触， 将球状结 构 21可转动地固定在卡位槽 13与凸棱 12之间， 并且压环 5与球状结构 21 相接触一端的结构为弧形结构。
在本申请实施例中， 压环 5上设置有凸块 51 —端的端面上还设置有两 个相对称的 V型扩张槽 52, 两个 V型扩张槽 52的轴线在一条直线上， 且与 两个凸块 51的连线相垂直， 用于当压环 5安装到位后， 在外力作用下， 将 V 型扩张槽 52所在的一端扩张， 使压环 5固定在卡位槽 13内。 如图 10所示， 图中 6为扩张工具， 使用扩张工具 6向两个 V型扩张槽 52进行施加压力 F , 压力 F会分成两个分力 F 1和 F2 ,并分别作用在 V型扩张槽 52的两个斜面上， 将压环 5上 V型扩张槽 52所在的一端扩张， 使压环 5固定在卡位槽 13内。 下面结合该万向推弓根螺钉的装配过程对其结构进行进一步描述。
装配该万向推弓根螺钉时， 首先将螺釘头 2上的棒体 20, 由螺钉座 1上 设有 U型开口 11的一端穿入,将螺钉头 2上的球状结构 21与凸棱 12相接触。 然后将压环 5上两个凸块 51分别卡在两个 U型开口 11 中， 并将压环 5推到 动与螺钉头 2的球状结构 21相接触， 并且此时压环 5上的两个凸块 51到达 卡位槽 13 , 再转动压环 5， 使两个 V型扩张槽 52的轴线与两个 U型开口 11 相平行。 在外力作用下， 将 V型扩张槽 52所在的一端扩张， 使压环 5固定在 卡位槽 13 内， 这样即可实现将螺釘头 2的球状结构 21可转动地固定在螺钉 座 1内。 由以上技术方案可见， 本申请实施例提供的万向推弓根螺钉， 螺钉座的 一端设置有凸棱、 螺钉头的棒体从螺钉座的另一端穿入螺钉座， 螺钉座上的 凸棱将螺钉头上的球状结构卡在螺钉座内， 压环设置在螺钉座内部的卡位槽 内， 并且压环在外界压力的作用下进行扩张， 固定在卡位槽内并将螺钉头的 球状结构固定在螺钉座内。 该万向推弓根螺钉中， 当向外拔螺钉头时， 螺钉 座上的凸棱将螺钉头的球状结构卡在螺钉座内， 由于螺钉座不会发生弹性形 变， 所以螺釘头的拔出强度大， 避免了现有的万向推弓根螺钉由于弹性卡圈 强度的原因， 而导致螺钉头拔出强度低， 进而导致螺钉头容易松动的问题。
此外， 弹性卡圏对材料弹性要相当的要求， 而目前植入物螺钉通常采用 的 Ti6A14V及 Ti6A17Nb等植入级别钛合金的弹性性能难以满足卡圈制作的弹 性要求， 而采用弹性较好的 Ti-M合金制作卡圈的话， 由于其材料与螺钉座及 螺钉头的材料不相同， 但当两种不同材料固定在一起作为植入物植入后， 在 人体体液的环境中， 会由于材料不同而存在产生电腐蚀的可能性， 影响推弓 根螺钉的质量及使用寿命。 而本申请实施例提供的万向推弓根螺钉中， 压环 是在外界压力的作用下扩张后， 固定在螺 丁座内的卡位槽内， 所以压环的材 料不需要弹性强度， 可以选择与螺钉座及螺钉头相同的材料， 因此可以避免 现有万向推弓根螺钉植入体内后由于电腐蚀而影响推弓根螺钉的质量及使用 寿命的问题。
以上所述仅是本申请的优选实施方式， 使本领域技术人员能够理解或实 现本申请。 对这些实施例的多种修改对本领域的技术人员来说将是显而易见 的， 本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下， 在其它实施例中实现。 因此， 本申请将不会被限制于本文所示的这些实施例， 而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims

, J ^ 巾
1、 一种万向推弓根螺釘， 其特征在于， 包括： 螺釘座、 螺釘头和压环， 其中：
所述螺釘座为管状结构， 其一端侧壁上设置有两个相对称 U型开口， 另 一端开口处内壁上设置有凸棱， 并且所述螺釘座内壁上设置有卡位槽；
所述螺釘头包括棒体和固定在所述棒体一端的球状结构， 且所述棒体上 设置有螺纹， 所述球状结构位于所述螺釘座内， 与所述凸棱的内侧相接触， 并且其外径大于所述凸棱的内径， 所述棒体位于所述螺釘座的外侧；
所述压环的一端外壁上设置有两个相对称的凸块， 且所述凸块设置在所 述卡位槽内， 所述压环与所述球状结构相接触， 且其内径大于所述螺釘头上 球状结构的外径， 将所述螺釘头上的球状结构可转动地固定在所述卡位槽与 凸棱之间。
2、 根据权利要求 1所述的万向推弓根螺釘， 其特征在于， 所述卡位槽设 置在所述 U型开口顶部与 U型开口底部之间的螺釘座的内壁上。
3、 根据权利要求 1所述的万向推弓根螺釘， 其特征在于， 所述压环与所 述球状结构相接触一端的结构为弧形结构。
4、 根据权利要求 3所述的万向推弓根螺釘， 其特征在于， 所述压环设置 有凸块一端的端面上还设置有两个相对称的 V型扩张槽。
5、 根据权利要求 4所述的万向推弓根螺釘， 其特征在于， 所述两个 V型 扩张槽的轴线在一条直线上， 且与所述两个凸块的连线相垂直。
6、 根据权利要求 1所述的万向推弓根螺釘， 其特征在于， 所述螺釘头球 状结构顶端设置有内六角形槽。
7、 根据权利要求 1所述的万向推弓根螺釘， 其特征在于， 所述螺釘座上 设置有凸棱的一端的断面上设置有三个万向槽。
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US8870928B2 (en) 2002-09-06 2014-10-28 Roger P. Jackson Helical guide and advancement flange with radially loaded lip
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US8911478B2 (en) 2012-11-21 2014-12-16 Roger P. Jackson Splay control closure for open bone anchor
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443467A (en) * 1993-03-10 1995-08-22 Biedermann Motech Gmbh Bone screw
US20040102781A1 (en) * 2002-11-25 2004-05-27 U & I Corporation Bone fixation apparatus, method and tool for assembling the same
US20070088357A1 (en) * 2005-10-18 2007-04-19 Sdgi Holdings, Inc. Adjustable bone anchor assembly
CN101389279A (zh) * 2004-06-17 2009-03-18 华沙整形外科股份有限公司 多轴线骨附连组合件
WO2009124196A2 (en) * 2008-04-03 2009-10-08 Life Spine, Inc. Top loading polyaxial spine screw assembly with one step lockup

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443467A (en) * 1993-03-10 1995-08-22 Biedermann Motech Gmbh Bone screw
US20040102781A1 (en) * 2002-11-25 2004-05-27 U & I Corporation Bone fixation apparatus, method and tool for assembling the same
CN101389279A (zh) * 2004-06-17 2009-03-18 华沙整形外科股份有限公司 多轴线骨附连组合件
US20070088357A1 (en) * 2005-10-18 2007-04-19 Sdgi Holdings, Inc. Adjustable bone anchor assembly
WO2009124196A2 (en) * 2008-04-03 2009-10-08 Life Spine, Inc. Top loading polyaxial spine screw assembly with one step lockup

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US10349983B2 (en) 2003-05-22 2019-07-16 Alphatec Spine, Inc. Pivotal bone anchor assembly with biased bushing for pre-lock friction fit
US8936623B2 (en) 2003-06-18 2015-01-20 Roger P. Jackson Polyaxial bone screw assembly
US8926670B2 (en) 2003-06-18 2015-01-06 Roger P. Jackson Polyaxial bone screw assembly
US9662143B2 (en) 2004-02-27 2017-05-30 Roger P Jackson Dynamic fixation assemblies with inner core and outer coil-like member
US11147591B2 (en) 2004-11-10 2021-10-19 Roger P Jackson Pivotal bone anchor receiver assembly with threaded closure
US8926672B2 (en) 2004-11-10 2015-01-06 Roger P. Jackson Splay control closure for open bone anchor
US8998960B2 (en) 2004-11-10 2015-04-07 Roger P. Jackson Polyaxial bone screw with helically wound capture connection
US9522021B2 (en) 2004-11-23 2016-12-20 Roger P. Jackson Polyaxial bone anchor with retainer with notch for mono-axial motion
US9308027B2 (en) 2005-05-27 2016-04-12 Roger P Jackson Polyaxial bone screw with shank articulation pressure insert and method
US11229457B2 (en) 2009-06-15 2022-01-25 Roger P. Jackson Pivotal bone anchor assembly with insert tool deployment
US9504496B2 (en) 2009-06-15 2016-11-29 Roger P. Jackson Polyaxial bone anchor with pop-on shank, friction fit retainer and winged insert
US9717534B2 (en) 2009-06-15 2017-08-01 Roger P. Jackson Polyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock
US8911479B2 (en) 2012-01-10 2014-12-16 Roger P. Jackson Multi-start closures for open implants
US9636146B2 (en) 2012-01-10 2017-05-02 Roger P. Jackson Multi-start closures for open implants
US9770265B2 (en) 2012-11-21 2017-09-26 Roger P. Jackson Splay control closure for open bone anchor
US8911478B2 (en) 2012-11-21 2014-12-16 Roger P. Jackson Splay control closure for open bone anchor
US10058354B2 (en) 2013-01-28 2018-08-28 Roger P. Jackson Pivotal bone anchor assembly with frictional shank head seating surfaces
US8852239B2 (en) 2013-02-15 2014-10-07 Roger P Jackson Sagittal angle screw with integral shank and receiver
US9566092B2 (en) 2013-10-29 2017-02-14 Roger P. Jackson Cervical bone anchor with collet retainer and outer locking sleeve
US9717533B2 (en) 2013-12-12 2017-08-01 Roger P. Jackson Bone anchor closure pivot-splay control flange form guide and advancement structure
US9451993B2 (en) 2014-01-09 2016-09-27 Roger P. Jackson Bi-radial pop-on cervical bone anchor
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