WO2018119672A1 - 一种椎板间融合器 - Google Patents

一种椎板间融合器 Download PDF

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Publication number
WO2018119672A1
WO2018119672A1 PCT/CN2016/112388 CN2016112388W WO2018119672A1 WO 2018119672 A1 WO2018119672 A1 WO 2018119672A1 CN 2016112388 W CN2016112388 W CN 2016112388W WO 2018119672 A1 WO2018119672 A1 WO 2018119672A1
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vertebral plate
fusion
interlaminar
fusion cage
cage according
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PCT/CN2016/112388
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English (en)
French (fr)
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马向阳
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马向阳
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Priority to PCT/CN2016/112388 priority Critical patent/WO2018119672A1/zh
Publication of WO2018119672A1 publication Critical patent/WO2018119672A1/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

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  • the invention relates to the field of medical devices, in particular to an interlaminar cage.
  • the adjacent vertebrae are connected by intervertebral discs, and the position of the intervertebral disc is the intervertebral space between the bony vertebral bodies.
  • Interbody fusion cages are often used in spinal fusion. Intervertebral cages are placed between the two vertebral bodies after removal of the intervertebral disc to support and promote fusion. After the bone tissue implanted in the cage is finally integrated with the upper and lower adjacent vertebral bodies to obtain bone healing, the spine is finally stabilized.
  • interbody fusion cages are placed between the vertebral bodies, and the interbody fusion cage of the present invention is placed on the lamina surface of the spine rather than between the vertebral bodies.
  • the interlaminar cage of the present invention is a whole body and placed on the surface of the lamina. As long as the bone tissue loaded at both ends of the cage and the bone tissue of the lamina are healed, the fusion purpose and stability requirements are achieved; especially For laminectomy, the requirements for fusion are the same, and the fusion difficulty is not increased, as long as the two ends are fused.
  • the invention provides an inter-slab fusion device, which solves the above mentioned problems, reduces the fusion difficulty, and improves the fusion effect and speed.
  • an inter-slab fusion device includes: a rectangular frame body, the four corners of the rectangular frame body are provided with screw holes, and the screw holes and the vertical surface are provided with 5-10 ° Angle. Since the outer wall of the human spine has a certain inclination angle, not a plane, the angle between the screw hole and the vertical surface is 5-10°, so that the direction of the adjusted screw hole can be perpendicular to the spinal lamina. The contact surface facilitates the screwing of the vertical lamina of the screw to prevent slipping, etc. By setting the angle of the screw hole and matching the inclination angle of the surface of the spinal lamina, a better interface between the cage and the lamina can be achieved. effect.
  • the direction of the angle between the four screw holes and the vertical plane is the same, and is biased toward the midline of the spine. Since the outer wall of the lamina of the human spine has a certain inclination angle and the central high side is low, the angle between the screw hole and the vertical surface is 5-10°, so that the direction of the adjusted screw hole can be perpendicular to the spine.
  • the contact surface of the lamina facilitates the vertical screwing of the screw into the lamina to prevent slippage, so that the bone graft tissue of the fusion device and the lamina bone tissue are more closely attached and facilitate fusion.
  • an arcuate notch is provided at a bottom or an upper side of the screw hole away from the frame. Since the screw has a certain angle, the screwing of the screw forms an angle with the frame structure of the interlaminar cage, and may cause extrusion. By providing a notch, especially the direction of the notch is consistent with the direction of the angle, It can reduce the extrusion and it can be fixed more deeply.
  • the rectangular frame body includes two long sides and two short sides, and the notch positions formed by the screw holes on the same long side are consistent, and the uniform arrangement can form a more stable fixing effect.
  • the long side is provided with a plurality of sidewall through holes. It facilitates the osmotic growth and recovery of the tissue, and enables the interlaminar cage to be integrated with the growing tissue and is more stable.
  • one of the two long sides is connected by a transverse plate, and the horizontal plate is disposed to protect the exposed spinal cord after the laminectomy.
  • a gap is provided between the two ends of the horizontal plate and the short side, and the gap is arranged to ensure direct contact between the bone graft and the bone tissue of the lamina, and the bone tissue is healed to fuse the fusion device with the lamina One.
  • the stability of the interbody cage can be effectively improved, the fusion strength can be increased, and the fracture can be prevented.
  • the length of the transverse plate is the height of one or several lamina, covering the missing area of the lamina after decompression of the lamina, protecting the spinal cord, and realizing filling and fixing of the bone tissue in the missing area between the two lamina
  • the length of the gap is 1/2 to 3/4 of the height of the single lamina, and the gap is arranged to facilitate direct contact between the bone particles in the cage and the lamina bone tissue for fusion growth to obtain final stability.
  • the horizontal plate is provided with a plurality of bottom through holes for facilitating the permeation growth and recovery of the tissue.
  • the short side is provided with a plurality of short side through holes. It facilitates the osmotic growth and recovery of the tissue, and enables the interlaminar cage to be integrated with the growing tissue and is more stable.
  • the short side is curved with the inner wall of the long side, and the curved contact surface is provided with a plurality of bumps.
  • the arrangement of the bumps can increase the anti-slip effect of the bone graft particles on the one hand, prevent the bone graft from coming out, increase the overall stability, and at the same time prevent more holes near the screw hole attachments, resulting in a decrease in the rigidity of the overall structure.
  • the interlaminar fusion device of the present invention by setting the angle of the screw hole and matching the curvature of the spine surface, a better fixation effect can be achieved, and the efficiency of the clinical operation can be improved.
  • the product is placed on the surface of the lamina, rather than between the vertebral bodies, and is a bone-inducing fusion device that is completely different from the interbody cage.
  • FIG. 1 is a schematic plan view showing an embodiment of an interlaminar fusion device according to the present invention
  • FIG. 2 is a schematic view showing an angle between a screw hole and a vertical direction of the interlaminar cage of FIG. 1;
  • FIG 3 is a schematic view showing the state of use of an embodiment of an interlaminar cage according to the present invention, wherein A is a lamina, B is a nerve, and C is a midline of the spine.
  • an interlaminar fusion cage includes: a rectangular frame body 1.
  • the four corners of the rectangular frame body 1 are provided with screw holes 2, and the screw holes 2 and the vertical surface are provided with 5-10°.
  • the angle is the angle a in Figure 2.
  • the direction of the adjusted screw hole 2 can be perpendicular to the contact surface of the spinal lamina, facilitating the screwing in and fixing of the screw 2, preventing slipping and the like.
  • the direction of the angle between the four screw holes 2 and the vertical plane is the same, and is biased toward the midline of the spine. To match the lamina contact surface setting.
  • the bottom or upper side of the screw hole 2 is provided with an arcuate notch 21 away from the frame.
  • the direction of the notch 21 coincides with the direction of the included angle, which reduces the squeezing and also allows for deeper fixing.
  • the rectangular frame 1 includes two long sides and two short sides, and the notches 21 formed by the screw holes 2 on the same long side have the same position, and the uniform arrangement can form a more stable fixing effect.
  • a plurality of side wall through holes 11 are provided on the long side. Convenient for tissue penetration and recovery.
  • one face of the two long sides is connected by the transverse plate 3, and the horizontal plate 3 is arranged to protect the bare spinal cord after the laminectomy, so that the length of the transverse plate 3 is one or several lamina after the upper and lower lamina
  • the length of the gap 4 is 1/2 to 3/4 of the height of the single lamina, and the gap 4 is arranged to ensure the passage of the tissue. Growth, easy to directly contact the fusion bone and the lamina bone tissue, for fusion growth, improve recovery speed.
  • the stability of the interbody cage can be effectively improved, the fusion strength can be increased, and the fusion device can be prevented from being broken.
  • the horizontal plate 3 is provided with a plurality of bottom surface through holes 31 for facilitating the permeation growth and recovery of the tissue.
  • a plurality of short-side through holes are provided on the short side. It facilitates the osmotic growth and recovery of tissue and enables the interbody fusion cage to be integrated with the growing tissue to be more stable.
  • the short side and the long side inner wall are curved, and the curved contact surface is provided with a plurality of bumps 12.
  • the convex 12-point setting can increase the anti-slip effect of the bone graft particles, prevent the bone graft from coming out, increase the overall stability, and prevent the hole near the screw hole attachment from causing the overall structural rigidity to decrease.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Neurology (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)

Abstract

一种椎板间融合器，包括：矩形框体（1），矩形框体（1）的四个角设有螺孔（2），螺孔（2）与垂直面设有5-10°夹角。椎板间融合器用于人体脊柱后柱的植骨融合，由于人体脊柱的椎板外壁具有一定的倾斜角度，中央高两侧低，所以，通过螺孔（2）与垂直面设有5-10°夹角，使调整后的螺孔（2）的方向能够垂直于脊柱椎板的接触面，便于螺钉垂直拧入椎板固定，防止打滑，使融合器的植骨组织与椎板骨组织贴合更加紧密，便于融合，通过对螺孔（2）进行夹角设置，配合脊柱椎板表面的倾斜角度，能够达到更好的融合器与椎板骨界面接触效果，提升临床手术融合的效率，是一种与传统椎体间融合器完全不同的置于椎板表面的促植骨融合装置。

Description

一种椎板间融合器 技术领域
本发明涉及医疗器械领域，特别是指一种椎板间融合器。
背景技术
由于脊柱由众多椎骨组成，7个颈椎，12个胸椎，5个腰椎，相邻椎骨之间由椎间盘连接，椎间盘所在的位置就是骨性椎体之间的椎间隙。椎间融合器在脊柱融合术中常常用到，椎间融合器是在切除椎间盘之后，放置在两个椎体之间的，起到支撑和促进融合作用。融合器内植入的骨组织最终与上、下相邻的椎体获得骨性愈合成为一个整体后，脊柱获得最终的稳定。
传统的椎间融合器放置于椎体之间，而本发明的椎板间融合器放置于脊柱的椎板表面，而非椎体之间。
临床上，因融合器置入相对困难，并非所有的脊柱融合术都需要使用椎间融合器，尤其是多节段固定融合时。故此，临床上常常在脊柱的后柱的椎板表面进行植骨，通常把骨组织修剪成颗粒状，铺于椎板表面，待骨组织愈合为一体后实现融合和稳定。但是，椎板表面植骨往往是在切除了1个或更多椎体的椎板之后，这就造成植骨颗粒直接位于脊髓的表面，由于担心脊髓压迫造成瘫痪，植骨往往不充分，另外，对于多个椎板切除者，只要植骨颗粒间存在线状或片状的不愈合区，则因为没有连为一体，都不能达到骨性融合的稳定性要求。
本发明的椎板间融合器是一个整体，置于椎板表面，只要融合器两端装填的骨组织与椎板的骨组织完成愈合，其融合目的和稳定性要求就已达到；尤其是多个椎板切除者，其对融合的要求一样，不增加融合难度，只要两端融合即可。
发明内容
本发明提出一种椎板间融合器，解决了上述中提到的问题，降低融合难度，提升融合效果和速度。
本发明的技术方案是这样实现的：一种椎板间融合器，包括：矩形框体，所述矩形框体的四个角设有螺孔，所述螺孔与垂直面设有5-10°夹角。由于人体脊柱椎板外壁具有一定的倾斜角度，而非平面，所以，通过所述螺孔与垂直面设有5-10°夹角，使调整后的螺孔的方向能够垂直于脊柱椎板的接触面，便于螺钉的垂直椎板拧入固定，防止打滑等，通过对所述螺孔进行夹角设置，配合脊柱椎板表面的倾斜角度，能够达到更好的融合器与椎板骨界面接触效果。
进一步，4个所述螺孔与垂直面的夹角的方向一致，且偏向脊柱中线。由于人体脊柱的椎板外壁具有一定的倾斜角度，中央高两侧低，所以，通过所述螺孔与垂直面设有5-10°夹角，使调整后的螺孔的方向能够垂直于脊柱椎板的接触面，便于螺钉的垂直拧入椎板固定，防止打滑，使融合器的植骨组织与椎板骨组织贴合更加紧密，便于融合。
进一步，所述螺孔的底部或者上方背离所述框体处设有弧形缺口。由于具有一定夹角后，螺钉的拧入会对所述椎板间融合器的框体结构形成夹角，而可能产生挤压，通过设置缺口，尤其是缺口的方向与夹角的方向一致，便可以降低挤压，而且也能更加深入的固定。
进一步，所述矩形框体包括2个长边和2个短边，位于同一长边的所述螺孔形成的所述缺口位置一致，一致性设置能够形成更加稳定的固定效果。
进一步，所述长边上设有若干侧壁通孔。便于组织的渗透生长与恢复，并且能够使所述椎板间融合器与生长的组织融为一体，更加稳固。
进一步，两个所述长边的一个面通过横板连接，横板的设置可以保护椎板切除之后裸露的脊髓。所述横板的两端与所述短边之间设有间隙，所述间隙的设置，能够保证植骨组织与椎板的骨组织直接接触，骨组织愈合后使得融合器与椎板融合为一体。同时，结合横板的固定，可以有效的提升所述椎间融合器的稳固性，增加融合强度，防止断裂。
进一步，所述横板的长度为1个或数个椎板的高度，覆盖椎板减压后的椎板缺失区域，保护脊髓，实现在两个椎板之间缺失区的骨组织填充固定，所述间隙的长度为单个椎板的高度的1/2～3/4，间隙的设置便于将融合器内的骨粒与椎板骨组织直接接触，进行融合生长，获得最终的稳定。
进一步，所述横板上设有若干底面通孔，便于组织的渗透生长与恢复。
进一步，所述短边上设有若干短边通孔。便于组织的渗透生长与恢复，并且能够使所述椎板间融合器与生长的组织融为一体，更加稳固。
进一步，所述短边与所述长边内壁相接处为弧形，所述弧形接触面上设有若干凸点。凸点的设置，一方面能够增加植骨颗粒的防滑效果，防止植骨脱出，增加整体的稳定性，同时，也防止靠近所述螺孔附件的孔洞较多导致整体结构刚性降低。
本发明的所述椎板间融合器，通过对所述螺孔进行夹角设置，配合脊柱面的弧度，能够达到更好的固定效果，提升临床手术的效率。该产品放置于椎板表面，而非椎体之间，是一种与椎间融合器完全不同的促植骨融合装置。
附图说明
为了更清楚地说明本发明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发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一种椎板间融合器一个实施例的平面结构示意图；
图2为图1所示椎板间融合器的螺孔与垂直方向的夹角示意图；
图3为本发明一种椎板间融合器一个实施例使用状态示意图，其中，A为椎板，B为神经，C为脊柱中线。
具体实施方式
下面将结合本发明实施例中的附图，对本发明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发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1至图3所示，一种椎板间融合器，包括：矩形框体1，矩形框体1的四个角设有螺孔2，螺孔2与垂直面设有5-10°夹角，即为图2中的角度a。调整后的螺孔2的方向能够垂直于脊柱椎板的接触面，便于螺钉2的拧入固定，防止打滑等。
进一步，4个螺孔2与垂直面的夹角的方向一致，且偏向脊柱中线。为配合椎板接触面设置。
进一步，螺孔2的底部或者上方背离框体处设有弧形缺口21。缺口21的方向与夹角的方向一致，可以降低挤压，而且也能更加深入的固定。
进一步，矩形框体1包括2个长边和2个短边，位于同一长边的螺孔2形成的缺口21位置一致，一致性设置能够形成更加稳定的固定效果。
进一步，长边上设有若干侧壁通孔11。便于组织的渗透生长与恢复。
进一步，两个长边的一个面通过横板3连接，横板3的设置可以保护椎板切除之后裸露的脊髓，从而，横板3的长度为1个或数个椎板切除后上下椎板之间的高度，横板3的两端与短边之间设有间隙4，间隙4的长度在为单个椎板的高度的1/2～3/4，间隙4的设置，能够保证组织通过生长，便于将融合骨粒与椎板骨组织直接接触，进行融合生长，提升恢复速度。同时，结合横板3的固定，可以有效的提升椎间融合器的稳固性，增加融合强度，防止融合器断裂。
进一步，横板3上设有若干底面通孔31，便于组织的渗透生长与恢复。
进一步，短边上设有若干短边通孔。便于组织的渗透生长与恢复，并且能够使椎板间融合器与生长的组织融为一体，更加稳固。
进一步，短边与长边内壁相接处为弧形，所述弧形接触面上设有若干凸点12。凸12点的设置，一方面能够增加植骨颗粒的防滑效果，防止植骨脱出，增加整体的稳定性，同时，也防止靠近螺孔附件的孔洞较多导致整体结构刚性降低。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种椎板间融合器，其特征在于，包括：矩形框体，所述矩形框体的四个角设有螺孔，所述螺孔与垂直面设有5-10°夹角。
  2. 如权利要求1中所述椎板间融合器，其特征在于：4个所述螺孔与垂直面的夹角的方向一致，且偏向脊柱中线。
  3. 如权利要求1中所述椎板间融合器，其特征在于：所述螺孔的底部或者上方背离所述框体处设有弧形缺口。
  4. 如权利要求3中所述椎板间融合器，其特征在于：所述矩形框体包括2个长边和2个短边，位于同一长边的所述螺孔形成的所述缺口位置一致。
  5. 如权利4中所述椎板间融合器，其特征在于：所述长边上设有若干侧壁通孔。
  6. 如权利4中所述椎板间融合器，其特征在于：两个所述长边的一个面通过横板连接，所述横板的两端与所述短边之间设有间隙。
  7. 如权利6中所述椎板间融合器，其特征在于：所述横板的长度为1个或数个椎板的高度，所述间隙长度为单个椎板的高度的1/2～3/4。
  8. 如权利6中所述椎板间融合器，其特征在于：所述横板上设有若干底面通孔。
  9. 如权利4中所述椎板间融合器，其特征在于：所述短边上设有若干短边通孔。
  10. 如权利9中所述椎板间融合器，其特征在于：所述短边与所述长边内壁相接处为弧形，所述弧形接触面上设有若干凸点。
PCT/CN2016/112388 2016-12-27 2016-12-27 一种椎板间融合器 WO2018119672A1 (zh)

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CN110338895A (zh) * 2019-08-20 2019-10-18 北京大学第三医院（北京大学第三临床医学院） 一种椎板间支撑、固定、融合装置
CN112674914A (zh) * 2019-10-17 2021-04-20 北京东玥润骐医疗技术发展有限公司 脊柱内镜可视化椎间融合器

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CN102791210A (zh) * 2010-03-04 2012-11-21 斯恩蒂斯有限公司 可膨胀的椎板脊椎熔合植入体
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CN204600639U (zh) * 2015-04-16 2015-09-02 闻泰医疗科技（上海）有限公司 一种复合颈椎椎骨内固定装置
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CN102791210A (zh) * 2010-03-04 2012-11-21 斯恩蒂斯有限公司 可膨胀的椎板脊椎熔合植入体
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