WO2021008132A1 - 一种旋转撑开式椎间融合器 - Google Patents

一种旋转撑开式椎间融合器 Download PDF

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Publication number
WO2021008132A1
WO2021008132A1 PCT/CN2020/074762 CN2020074762W WO2021008132A1 WO 2021008132 A1 WO2021008132 A1 WO 2021008132A1 CN 2020074762 W CN2020074762 W CN 2020074762W WO 2021008132 A1 WO2021008132 A1 WO 2021008132A1
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WIPO (PCT)
Prior art keywords
fusion cage
transmission
expansion type
shaped
upper body
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PCT/CN2020/074762
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English (en)
French (fr)
Inventor
牟国良
何强龙
徐淑芬
彭伟
方晓斌
汪庆
朱伟强
杜永杰
刘政磊
许吉锋
Original Assignee
浙江科惠医疗器械股份有限公司
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Publication of WO2021008132A1 publication Critical patent/WO2021008132A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages

Definitions

  • the invention belongs to the technical field of medical devices, and specifically relates to a rotary expansion type intervertebral fusion cage.
  • spinal degeneration is more common in orthopedics clinics.
  • the common ones include degeneration of intervertebral disc, spinal stenosis, spondylolisthesis, and compression of the spinal cord or nerve roots often require surgical treatment to completely relieve the compression, restore the physiological curvature of the spine, and protect the spine stable.
  • some patients with spinal deformity, trauma, tumor, repair surgery and infection sometimes need interbody fusion to stabilize lumbar spine segments.
  • the intervertebral fusion cage has a good effect on the above spinal diseases. Its operation is simple, easy to use, high fusion rate, and no complications of bone graft fusion. It has been widely used and clinically.
  • the method used is to combine one or more vertebrae
  • the intervertebral fusion cage is filled into the intervertebral disc, effectively opening and restoring the height of the intervertebral space, fuse the upper and lower vertebral bodies.
  • the method of implanting multiple smaller fusion cages at the same time and then assembling them in the human body to form a fusion cage with sufficient volume although it can reduce the size of the surgical wound, it also has cumbersome operations and prolongs the operation time.
  • the purpose of the present invention is to provide a rotating expansion type intervertebral fusion cage, which overcomes the disadvantages of large trauma, severe pain and long recovery time after a single cage is implanted in the prior art, or implantation of multiple cages At the same time, the operation is complicated, the operation time is long, and the stability is insufficient.
  • a rotary expansion type intervertebral fusion cage comprising a fusion cage upper body, a fusion cage lower body, a transmission body and a transmission screw.
  • the fusion cage upper body and the fusion cage lower body are both Z-shaped, and the fusion cage upper body is close to the fusion
  • a first circular groove is opened in the middle of one end surface of the lower body of the fusion device, and a second circular groove is opened in the middle of one end surface of the lower body of the fusion device close to the upper body of the fusion device.
  • the upper body of the fusion device and the lower body of the fusion device are formed by the transmission body.
  • the "X"-shaped hinge, the first circular groove and the second circular groove combine to form a cavity for accommodating the transmission body and the transmission screw, the lower body of the fusion device is fixedly connected to the lower end of the transmission body, the fusion device The upper body is rotatably connected with the upper end of the transmission body, the upper body of the cage is provided with threaded holes matching with the transmission screw, and the free end of the transmission screw is clamped on the transmission body.
  • the transmission body includes a circular shaft, a connecting column and a connecting platform, and the diameter of the connecting column is larger than the diameter of the circular shaft.
  • the upper body of the fusion device is provided with a shaft hole matching the circular shaft, the circular shaft and the shaft hole are in clearance fit, and the lower body of the fusion device is provided with a connecting hole matching the connection platform , The connecting platform and the connecting hole are interference fit.
  • the transmission body is connected to the upper body of the cage and fixed to the lower body through the clearance fit between the circular shaft and the shaft hole, and the interference fit between the connecting platform and the connecting hole. connection.
  • the connecting platform is a hexagonal prism
  • the connecting hole is a hexagonal hole that is interference fit with the connecting platform.
  • a transverse protrusion is integrally formed on the connecting column, the free end of the transverse protrusion is provided with a U-shaped slot in the vertical direction of the central axis of the connecting column, and the transmission screw includes a threaded rod, a round rod and a U The threaded rod is screwed into the threaded hole at the locking end matched with the shaped locking groove.
  • the transmission screw is clamped into the U-shaped slot of the transmission body through the clamping end. During installation, the clamping end can be directly clamped in from the free end of the U-shaped clamping slot. The structure is simple and the installation is convenient.
  • transverse protrusion is arc-shaped.
  • Such a structural design can increase the adjustment range of the transmission body, that is, increase the opening and closing angle range between the upper body of the cage and the lower body of the cage.
  • the cross-section of the transverse wall of the U-shaped groove is V-shaped
  • the diameter of the clamping end is larger than the diameter of the round rod
  • the outer wall of the clamping end is provided with an annular V-shaped groove matching the U-shaped groove.
  • the free end of the threaded rod is provided with a hexagonal blind hole.
  • the threaded rod can be rotated by a hexagonal wrench, thereby adjusting the opening and closing angle between the upper body of the cage and the lower body of the cage, which is more convenient to use.
  • one end of the upper body of the cage away from the threaded hole is a convex first arc surface
  • the end of the lower body of the cage corresponding to the first arc surface is a convex second arc surface.
  • both the upper and lower end surfaces of the upper body of the fusion device and the lower body of the fusion device are provided with a sawtooth structure.
  • the upper body of the fusion device is provided with notches on the upper and lower end surfaces of the corresponding end of the threaded hole.
  • the unsupported intervertebral fusion cage is small in size, and the implantation process is convenient and quick. After the intervertebral space is implanted, the lower body of the fusion cage can be rotated and expanded relative to the upper body of the fusion cage by rotating the transmission screw in the body. The fusion cage is in full contact with the endplate of the vertebral body, thereby reducing the size of the surgical trauma;
  • the surgical trauma is small and the operation time is short.
  • the upper body of the fusion cage and the lower body of the fusion cage are connected together by the transmission body and the transmission screw, and the mutual positioning is accurate, which can provide good initial stability after the operation.
  • the intervertebral fusion cage adjusts the position of the transmission body by screwing the transmission screw, and uses the linkage function of the rotating transmission body with the upper body of the fusion cage and the lower body of the fusion cage to realize the rotation and expansion of the internal fusion cage, thereby improving the efficiency of the operation And the stability of postoperative fusion.
  • Fig. 1 is a schematic structural view of an embodiment of a rotary expansion type intervertebral fusion cage of the present invention
  • FIG. 2 is a schematic diagram of the structure of the intervertebral fusion cage before being implanted in an embodiment of the rotating expansion type intervertebral fusion cage of the present invention
  • FIG. 3 is a schematic diagram of the structure of the intervertebral fusion cage after implantation in the embodiment of the rotating expansion type intervertebral fusion cage of the present invention
  • Figure 4 is a schematic structural view of a transmission body in an embodiment of a rotary expansion type intervertebral fusion cage of the present invention
  • Fig. 5 is a schematic structural diagram of a rotating screw in an embodiment of a rotating expansion type intervertebral fusion cage of the present invention
  • a rotary expansion type intervertebral fusion cage of the present invention includes an upper fusion cage 1, a lower fusion cage 2, a transmission body 3 and a transmission screw 4.
  • the upper fusion cage 1 and the fusion cage The upper and lower end surfaces of the lower body 2 are provided with a zigzag structure.
  • the upper body 1 and the lower body 2 are both Z-shaped.
  • the top surface of the upper body 1 and the bottom surface of the lower body 2 are both Z-shaped.
  • the upper body 1 of the fusion device is provided with a first circular groove 101 in the middle of one end surface near the lower body 2 of the fusion device, and a second circular groove 102 is opened in the middle of the end surface of the lower body 2 near the upper body 1 of the fusion device.
  • the upper body 1 and the lower body 2 of the cage are hinged in an "X" shape through the transmission body 3, so that the first circular groove 101 and the second circular groove 102 combine to form a cavity for accommodating the transmission body 3 and the transmission screw 4, and merge
  • the lower body 2 of the fusion device is fixedly connected with the lower end of the transmission body 3.
  • the upper body 1 of the fusion device is rotatably connected with the upper end of the transmission body 3.
  • the upper body 1 of the fusion device is provided with a threaded hole 11 that matches the transmission screw 4. Connected to the transmission body 3.
  • the transmission body 3 includes an integrally formed circular shaft 31, a connecting column 30 and a connecting platform 33 from top to bottom.
  • the diameter of the connecting column 30 is larger than the diameter of the circular shaft 31.
  • the upper body 1 and the lower body 2 of the fusion device are supported by the connecting posts 30, so that a space can be formed between the upper body 1 and the lower body 2 of the fusion device to accommodate the transmission screw 4.
  • the upper body 1 of the fusion cage is provided with a shaft hole 310 that matches the circular shaft 31, the circular shaft 31 and the shaft hole 310 are in clearance fit, and the lower body 2 of the fusion cage is provided with a connection hole 330 that matches the connection platform 33.
  • the connecting platform 33 and the connecting hole 330 are interference fit.
  • the transmission body 3 completes the rotatable connection with the upper body 1 of the cage and the lower body 2 through the clearance fit between the circular shaft 31 and the shaft hole 310, and the interference fit between the connecting platform 33 and the connecting hole 330. Fixed connection.
  • the connecting platform 33 is a hexagonal prism, and the connecting hole 330 is a hexagonal hole that is interference fit with the connecting platform 33.
  • the connecting platform 33 of the hexagonal prism Through the interference fit of the connecting platform 33 of the hexagonal prism and the hexagonal hole, the fixed connection between the transmission body 3 and the lower body 2 of the cage is completed.
  • the connecting platform 33 of the hexagonal prism Compared with the connecting platform 33 of the cylindrical column, the connecting platform 33 of the hexagonal prism has a higher circumference. Bearing capacity to rotation.
  • the connecting column 30 is integrally formed with a transverse protrusion 32.
  • the free end of the transverse protrusion 32 is provided with a U-shaped slot 320 in the vertical direction of the central axis of the connecting column 30.
  • the transmission screw 4 includes an integrated threaded rod 41, a round rod 42 and The clamping end 43 matched with the U-shaped clamping groove 320, the threaded rod 41 is screwed into the threaded hole 11.
  • the transmission screw 4 is clamped in the U-shaped slot 320 of the transmission body 3 through the clamping end 43. When installing, the clamping end 43 can be directly clamped in from the free end of the U-shaped clamping slot 320.
  • the structure is simple and the installation is convenient. .
  • the transverse protrusion 32 has an arc shape.
  • the adjustment range of the transmission body 3 can be increased, that is, the opening and closing angle range between the upper body 1 and the lower body 2 of the fusion device can be increased.
  • the U-shaped clamping groove 320 has a V-shaped cross section, the diameter of the clamping end 43 is larger than the diameter of the round rod 42, and the outer wall of the clamping end 43 is provided with an annular V-shaped groove 430 matching the U-shaped clamping groove 320.
  • the U-shaped clamping slot 320 with a V-shaped cross-section of the transverse wall cooperates with the clamping end 43 provided with an annular V-shaped groove 430, so that the clamping end 43 is clamped in the U-shaped clamping groove 320, and when the transmission screw 4 rotates, it is integrated
  • the lower body 2 rotates more smoothly.
  • the free end of the threaded rod 41 is provided with a hexagonal blind hole 410.
  • the threaded rod 41 can be rotated by a hexagonal wrench, thereby adjusting the opening and closing angle between the upper body 1 and the lower body 2 of the fusion cage, which is more convenient to use.
  • One end of the upper body 1 of the cage 1 away from the threaded hole 11 is a convex first curved surface 201
  • the end of the lower body 2 of the cage 2 corresponding to the first curved surface 201 is a convex second curved surface 202.
  • the upper body 1 of the cage is provided with notches 110 on the upper and lower end surfaces of the corresponding end of the threaded hole 11. Easy to hold and take the equipment.
  • the upper body 1, the lower body 2, the transmission body 3 and the transmission screw 4 are assembled together, and the upper body 1 and the lower body 2 are rotated by the transmission screw 4 Fit together (as shown in Figure 2);
  • the intervertebral fusion cage When in use, the intervertebral fusion cage is implanted from the patient’s wound into the intervertebral space, and then the transmission screw 4 is screwed to drive the transmission body 3 to rotate, thereby driving the lower body of the fusion cage 2 to center on the transmission body 3, relative to the upper body 1 Rotate to adjust the opening and closing angle between the upper body 1 and the lower body 2 of the cage.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)

Abstract

本发明属于医疗器械技术领域，具体涉及一种旋转撑开式椎间融合器，包括融合器上体、融合器下体、传动体和传动螺钉，融合器上体靠近融合器下体一端端面开设有第一圆形凹槽，融合器下体靠近融合器上体一端端面开设有第二圆形凹槽，融合器上体和融合器下体通过传动体呈"X"型铰接，第一圆形凹槽和第二圆形凹槽组合构成容纳传动体和传动螺钉的空腔，融合器下体与传动体的下端固定连接，融合器上体与传动体上端转动连接，融合器上体上开设有与传动螺钉相匹配的螺纹孔，传动螺钉自由端卡接在传动体上。其目的是：克服现有技术中单一融合器植入后创伤大、疼痛严重、恢复时间长的不足，或植入多个融合器时，操作复杂、手术时间长、稳定度不足的问题。

Description

一种旋转撑开式椎间融合器 技术领域
本发明属于医疗器械技术领域，具体涉及一种旋转撑开式椎间融合器。
 背景技术
众所周知，骨科临床上脊柱退行性变多见，常见的有椎间盘退行性变，椎管狭窄，脊椎滑脱，压迫脊髓或神经根者常需手术治疗，彻底解除压迫，恢复脊椎生理曲度，保障脊柱稳定。另外一部分脊柱畸形，外伤，肿瘤，返修手术和感染病人有时也需进行椎间融合术以稳定腰椎节段。椎间融合器针对以上脊柱疾病有较好的疗效，其操作简单，使用方便，融合率高，无植骨融合的并发症，现已经普遍应用与临床，采用的方式是将一个或者多个椎间融合器填入椎间盘内，有效地撑开并恢复椎间隙高度，使上下椎体融合。
 技术问题
为了确保术后，两个腰椎节段之间有良好的初始稳定性，往往需要植入一个体积较大的融合器，在融合器植入过程中，由于融合器体积较大，从而在术中需要切割较大的创口，这将不利于患者的术后恢复。
而采用多个较小的融合器的同时植入，再在人体内进行组装的方式形成体积足够的融合器的方法，虽然能减小手术创口的大小，但也存在操作繁琐，会延长手术时间的问题，而且植入的多个融合器相互之间不存在连接关系，位置定位不准，同样将导致椎体不稳。
 技术解决方案
本发明的目的是：旨在提供一种旋转撑开式椎间融合器，克服现有技术中单一融合器植入后创伤大、疼痛严重、恢复时间长的不足，或植入多个融合器时，操作复杂、手术时间长、稳定度不足的问题。
为实现上述技术目的，本发明采用的技术方案如下：
一种旋转撑开式椎间融合器，包括融合器上体、融合器下体、传动体和传动螺钉，所述融合器上体和融合器下体均呈Z形，所述融合器上体靠近融合器下体一端端面中部开设有第一圆形凹槽，所述融合器下体靠近融合器上体一端端面中部开设有第二圆形凹槽，所述融合器上体和融合器下体通过传动体呈“X”型铰接，所述第一圆形凹槽和第二圆形凹槽组合构成容纳传动体和传动螺钉的空腔，所述融合器下体与传动体的下端固定连接，所述融合器上体与传动体上端转动连接，所述融合器上体上开设有与传动螺钉相匹配的螺纹孔，所述传动螺钉自由端卡接在传动体上。
进一步限定，所述传动体包括圆形轴、连接柱和连接台，所述连接柱的直径尺寸大于圆形轴的直径尺寸。这样的结构设计，通过连接柱对融合器上体和融合器下体进行支撑，从而使得融合器上体和融合器下体之间能形成空间，以容纳传动螺钉。
进一步限定，所述融合器上体上开设有与圆形轴相匹配的轴孔，所述圆形轴与轴孔为间隙配合，所述融合器下体上开设有与连接台相匹配的连接孔，所述连接台和连接孔为过盈配合。这样的结构设计，传动体分别通过圆形轴和轴孔之间的间隙配合、连接台和连接孔之间的过盈配合，完成与融合器上体的可转动连接，与融合器下体的固定连接。
进一步限定，所述连接台为六棱柱，所述连接孔为与连接台过盈配合的六角孔。这样的结构设计，通过六棱柱的连接台和六角孔的过盈配合，完成传动体和融合器下体之间的固定连接，相对于圆柱形的连接台，六棱柱的连接台具有更高的周向转动承载力。
进一步限定，所述连接柱上一体成型有横突块，所述横突块自由端于连接柱中轴线的垂直方向开设有U型卡槽，所述传动螺钉包括螺纹杆、圆杆和与U形卡槽相匹配的卡设端，所述螺纹杆螺接在螺纹孔内。这样的结构设计，传动螺钉通过卡设端卡接在传动体的U型卡槽内，安装时，直接把卡设端从U形卡槽的自由端卡入即可，结构简单，安装方便。
进一步限定，所述横突块呈弧形。这样的结构设计，可增大传动体的调节范围，即增大融合器上体和融合器下体之间的开合角度范围。
进一步限定，所述U型卡槽横壁截面呈V型，所述卡设端的直径尺寸大于圆杆的直径尺寸，所述卡设端外壁开设有与U型卡槽相匹配的环形V型槽。这样的结构设计，通过横壁截面呈V型的U型卡槽和开设有环形V型槽的卡设端相配合，使得卡设端卡设在U型卡槽内，传动螺钉转动时，融合器下体的旋转更加顺畅。
进一步限定，所述螺纹杆自由端开设有六角盲孔。这样的结构设计，可通过六角扳手对螺纹杆进行旋转，从而调节融合器上体和融合器下体之间的开合角度，使用更加方便。
进一步限定，所述融合器上体远离螺纹孔一端为外凸的第一弧形面，所述融合器下体与第一弧形面对应的一端为外凸的第二弧形面。这样的结构设计，通过第一弧形面和第二弧形面的设置，使得椎间融合器能更加方便地从手术创口植入椎间隙。
进一步限定，所述融合器上体和融合器下体的上下端面均设有锯齿结构。
进一步限定，所述融合器上体于螺纹孔对应一端的上下端面均开设有槽口。这样的结构设计，便于器械持取。
 有益效果
采用上述技术方案的发明，具有如下优点：
1、未撑开的椎间融合器体积小，植入过程方便快捷，植入椎间隙后可在体内通过对传动螺钉的旋转，带动融合器下体相对于融合器上体旋转撑开扩张，使得融合器与椎体终板充分接触，从而减小手术对创伤大小的要求；
2、植入过程中手术创伤小、手术时间短，融合器上体和融合器下体通过传动体和传动螺钉连接在一起，相互之间定位准确，术后可以提供良好的初始稳定性。
3、椎间融合器通过旋拧传动螺钉调节传动体的位置，利用旋转移动的传动体与融合器上体和融合器下体的联动作用，实现体内融合器的旋转撑开，从而提高手术的效率和术后融合的稳定性。
 附图说明
本发明可以通过附图给出的非限定性实施例进一步说明；
图1为本发明一种旋转撑开式椎间融合器实施例的结构示意图；
图2为本发明一种旋转撑开式椎间融合器实施例中椎间融合器植入前的结构示意图；
图3为本发明一种旋转撑开式椎间融合器实施例中椎间融合器植入后的结构示意图；
图4为本发明一种旋转撑开式椎间融合器实施例中传动体的结构示意图；
图5为本发明一种旋转撑开式椎间融合器实施例中转动螺钉的结构示意图；
主要元件符号说明如下：
融合器上体1、第一圆形凹槽101、第二圆形凹槽102、螺纹孔11、槽口110、融合器下体2、第一弧形面201、第二弧形面202、传动体3、连接柱30、圆形轴31、轴孔310、横突块32、U型卡槽320、连接台33、连接孔330、传动螺钉4、螺纹杆41、六角盲孔410、圆杆42、卡设端43、环形V型槽430。
 本发明的最佳实施方式
在此处键入本发明的最佳实施方式描述段落。
 本发明的实施方式
为了使本领域的技术人员可以更好地理解本发明，下面结合附图和实施例对本发明技术方案进一步说明。
如图1～图5所示，本发明的一种旋转撑开式椎间融合器，包括融合器上体1、融合器下体2、传动体3和传动螺钉4，融合器上体1和融合器下体2的上下端面均设有锯齿结构，融合器上体1和融合器下体2均呈Z形，附图1中，融合器上体1的顶面和融合器下体2的底面均呈Z形，融合器上体1靠近融合器下体2一端端面中部开设有第一圆形凹槽101，融合器下体2靠近融合器上体1一端端面中部开设有第二圆形凹槽102，融合器上体1和融合器下体2通过传动体3呈“X”型铰接，使得第一圆形凹槽101和第二圆形凹槽102组合构成容纳传动体3和传动螺钉4的空腔，融合器下体2与传动体3的下端固定连接，融合器上体1与传动体3上端转动连接，融合器上体1上开设有与传动螺钉4相匹配的螺纹孔11，传动螺钉4自由端卡接在传动体3上。
传动体3包括从上到下包括一体成型的圆形轴31、连接柱30和连接台33，连接柱30的直径尺寸大于圆形轴31的直径尺寸。通过连接柱30对融合器上体1和融合器下体2进行支撑，从而使得融合器上体1和融合器下体2之间能形成空间，以容纳传动螺钉4。
融合器上体1上开设有与圆形轴31相匹配的轴孔310，圆形轴31与轴孔310为间隙配合，融合器下体2上开设有与连接台33相匹配的连接孔330，连接台33和连接孔330为过盈配合。传动体3分别通过圆形轴31和轴孔310之间的间隙配合、连接台33和连接孔330之间的过盈配合，完成与融合器上体1的可转动连接，与融合器下体2的固定连接。
连接台33为六棱柱，连接孔330为与连接台33过盈配合的六角孔。通过六棱柱的连接台33和六角孔的过盈配合，完成传动体3和融合器下体2之间的固定连接，相对于圆柱形的连接台33，六棱柱的连接台33具有更高的周向转动承载力。
连接柱30上一体成型有横突块32，横突块32自由端于连接柱30中轴线的垂直方向开设有U型卡槽320，传动螺钉4包括一体成型的螺纹杆41、圆杆42和与U形卡槽320相匹配的卡设端43，螺纹杆41螺接在螺纹孔11内。传动螺钉4通过卡设端43卡接在传动体3的U型卡槽320内，安装时，直接把卡设端43从U形卡槽320的自由端卡入即可，结构简单，安装方便。
横突块32呈弧形。可增大传动体3的调节范围，即增大融合器上体1和融合器下体2之间的开合角度范围。
U型卡槽320横壁截面呈V型，卡设端43的直径尺寸大于圆杆42的直径尺寸，卡设端43外壁开设有与U型卡槽320相匹配的环形V型槽430。通过横壁截面呈V型的U型卡槽320和开设有环形V型槽430的卡设端43相配合，使得卡设端43卡设在U型卡槽320内，传动螺钉4转动时，融合器下体2的旋转更加顺畅。
螺纹杆41自由端开设有六角盲孔410。可通过六角扳手对螺纹杆41进行旋转，从而调节融合器上体1和融合器下体2之间的开合角度，使用更加方便。
融合器上体1远离螺纹孔11一端为外凸的第一弧形面201，融合器下体2与第一弧形面201对应的一端为外凸的第二弧形面202。通过第一弧形面201和第二弧形面202的设置，使得椎间融合器能更加方便地从手术创口植入椎间隙。
融合器上体1于螺纹孔11对应一端的上下端面均开设有槽口110。便于器械持取。
本实施例中，使用前，把融合器上体1、融合器下体2、传动体3和传动螺钉4组装在一起，通过对传动螺钉4的旋转，使得融合器上体1和融合器下体2贴合在一起（如图2所示）；
使用时，把椎间融合器从患者的创口植入椎间隙，然后通过旋拧传动螺钉4，带动传动体3转动，从而带动融合器下体2以传动体3为中心,相对于融合上体1旋转，以调节融合器上体1和融合器下体2之间的开合角度。
以上对本发明提供的一种旋转撑开式椎间融合器进行了详细介绍。具体实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。
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Claims (10)

  1. 一种旋转撑开式椎间融合器，其特征在于：包括融合器上体（1）、融合器下体（2）、传动体（3）和传动螺钉（4），所述融合器上体（1）靠近融合器下体（2）一端端面中部开设有第一圆形凹槽（101），所述融合器下体（2）靠近融合器上体（1）一端端面中部开设有第二圆形凹槽（102），所述融合器上体（1）和融合器下体（2）通过传动体（3）呈“X”型铰接，所述第一圆形凹槽101和第二圆形凹槽102组合构成容纳传动体（3）和传动螺钉（4）的空腔，所述融合器下体（2）与传动体（3）的下端固定连接，所述融合器上体（1）与传动体（3）上端转动连接，所述融合器上体（1）上开设有与传动螺钉（4）相匹配的螺纹孔（11），所述传动螺钉（4）自由端卡接在传动体（3）上。
  2. 根据权利要求1所述的一种旋转撑开式椎间融合器，其特征在于：所述传动体（3）包括圆形轴（31）、连接柱（30）和连接台（33），所述连接柱（30）的直径尺寸大于圆形轴（31）的直径尺寸。
  3. 根据权利要求2所述的一种旋转撑开式椎间融合器，其特征在于：所述融合器上体（1）上开设有与圆形轴（31）相匹配的轴孔（310），所述圆形轴（31）与轴孔（310）为间隙配合，所述融合器下体（2）上开设有与连接台（33）相匹配的连接孔（330），所述连接台（33）和连接孔（330）为过盈配合。
  4. 根据权利要求3所述的一种旋转撑开式椎间融合器，其特征在于：所述连接台（33）为六棱柱，所述连接孔（330）为与连接台（33）过盈配合的六角孔。
  5. 根据权利要求2所述的一种旋转撑开式椎间融合器，其特征在于：所述连接柱（30）上一体成型有横突块（32），所述横突块（32）自由端于连接柱（30）中轴线的垂直方向开设有U型卡槽（320），所述传动螺钉（4）包括螺纹杆（41）、圆杆（42）和与U形卡槽（320）相匹配的卡设端（43），所述螺纹杆（41）螺接在螺纹孔（11）内。
  6. 根据权利要求5所述的一种旋转撑开式椎间融合器，其特征在于：所述横突块（32）呈弧形。
  7. 根据权利要求5所述的一种旋转撑开式椎间融合器，其特征在于：所述U型卡槽（320）横壁截面呈V型，所述卡设端（43）的直径尺寸大于圆杆（42）的直径尺寸，所述卡设端（43）外壁开设有与U型卡槽（320）相匹配的环形V型槽（430）。
  8. 根据权利要求1所述的一种旋转撑开式椎间融合器，其特征在于：所述融合器上体（1）远离螺纹孔（11）一端为外凸的第一弧形面（201），所述融合器下体（2）与第一弧形面（201）对应的一端为外凸的第二弧形面（202）。
  9. 根据权利要求1所述的一种旋转撑开式椎间融合器，其特征在于：所述融合器上体（1）和融合器下体（2）的上下端面均设有锯齿结构。
  10. 根据权利要求1所述的一种旋转撑开式椎间融合器，其特征在于：所述融合器上体（1）于螺纹孔（11）对应一端的上下端面均开设有槽口（110）。
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