技术领域technical field
本发明涉及一种用于椎间融合的前路腰椎椎间融合器。The invention relates to an anterior lumbar intervertebral fusion device for intervertebral fusion.
背景技术Background technique
目前脊柱椎间融合器上下端面啮合齿采取对称设计，如CN102781373(A)，EP3011933(A1)，简洁美观，能起到防脱作用。然而，解剖学上发现与融合器上下端面相邻的椎体终板硬度存在显著性差异，下椎体的上终板硬度低。若在椎间隙中植入啮合齿采取对称设计的融合器，器体下端面的啮合齿会先咬紧下椎体的上终板，而器体上端面的啮合齿未咬紧上椎体的下终板，融合器在椎间隙内的固定仅依靠下椎体的上终板，固定效果不佳。At present, the meshing teeth on the upper and lower end surfaces of the spinal intervertebral fusion device adopt a symmetrical design, such as CN102781373 (A) and EP3011933 (A1), which are simple and beautiful, and can play a role in preventing loss. However, it was found anatomically that there was a significant difference in the stiffness of the vertebral endplates adjacent to the upper and lower end surfaces of the fusion cage, and the hardness of the upper endplate of the lower vertebral body was low. If a cage with a symmetrical design of meshing teeth is implanted in the intervertebral space, the meshing teeth on the lower end of the body will first bite the upper endplate of the lower vertebral body, while the meshing teeth on the upper end of the body will not bite the upper endplate of the upper vertebral body. For the lower endplate, the fixation of the cage in the intervertebral space only depends on the upper endplate of the lower vertebral body, and the fixation effect is not good.
从现有技术的现有设计，特别是从美国专利申请US7637952(B2)当中的前路腰椎椎间融合器的前端面为平面。若融合器在椎间隙内向前移位，极易压迫前方的神经根。From the existing designs of the prior art, especially from the US Patent Application No. 7,637,952 (B2), the front end face of the anterior lumbar interbody fusion device is a plane. If the cage moves forward in the intervertebral space, it is easy to compress the nerve root in front.
目前椎间融合器上下端面采取平面设计或者圆弧面设计，在对终板进行一些处理后，能达到一定的配合。然而，解剖学发现椎体终板实际形状比起平面或者圆柱面更接近于盆地，中部低四周高，即原先与髓核接触的终板中央部分坡度小呈现平原，而原先与纤维环接触的终板四周骨突环坡度大，呈现山脉。At present, the upper and lower end surfaces of the intervertebral fusion cage adopt a planar design or a circular arc surface design, and after some processing of the endplate, a certain fit can be achieved. However, the anatomy found that the actual shape of the vertebral endplate is closer to a basin than a flat or cylindrical surface, and the middle part is lower and higher around the periphery. That is, the central part of the endplate that was originally in contact with the nucleus pulposus has a small slope and is plain, while the original contact with the fibrous annulus The bony protruding ring around the endplate has a steep slope, presenting mountains.
发明内容Contents of the invention
本发明的目的是提供一种固定效果更好、保护神经根、与椎体终板贴合更好的前路腰椎椎间融合器。本发明的另一目的是提供一种减小下端面啮合齿齿顶的总面积，增大下端面啮合齿与上终板接触面压应力，促进器体上、下端面的啮合齿同时咬紧对应的椎体终板的前路腰椎椎间融合器。The object of the present invention is to provide an anterior lumbar intervertebral fusion device with better fixation effect, nerve root protection and better fit with vertebral body endplate. Another object of the present invention is to provide a method that reduces the total area of the tooth tops of the lower end surface meshing teeth, increases the compressive stress on the contact surface between the lower end surface meshing teeth and the upper end plate, and promotes the simultaneous clenching of the upper and lower end surface meshing teeth of the body. Corresponding to the anterior lumbar interbody fusion cage for the vertebral endplate.
本发明的技术解决方案是所述用于椎间融合的前路腰椎椎间融合器，包括上端面、下端面、侧壁，和贯穿上、下端面使骨移植物或替代物生长的通孔，侧壁包括左侧壁、右侧壁、前壁和后壁，其特殊之处在于，所述前壁设有为神经根预留充足的内凹空间，后壁外凸并开设有供椎间盘正前方或侧前方植入的至少两个孔。The technical solution of the present invention is the anterior lumbar intervertebral fusion device for intervertebral fusion, comprising an upper end surface, a lower end surface, a side wall, and a through hole through the upper and lower end surfaces to grow bone grafts or substitutes , the side wall includes the left side wall, the right side wall, the front wall and the back wall. At least two holes for direct anterior or lateral anterior implantation.
作为优选：所述上端面、下端面位于所述通孔周边体开设有若干啮合齿。Preferably, the upper end surface and the lower end surface are provided with a plurality of meshing teeth on the peripheral body of the through hole.
作为优选：所述上端面啮合齿齿顶总面积小于下端面啮合齿齿顶总面积；所述上端面啮合齿的齿数小于下端面啮合齿的齿数，或者所述上端面单个啮合齿齿顶面积小于下端面单个啮合齿齿顶面积。As a preference: the total area of the tooth tops of the upper meshing teeth is smaller than the total area of the tooth tops of the lower meshing teeth; the number of teeth of the upper meshing teeth is smaller than the number of teeth of the lower meshing teeth, or the area of the tooth tops of a single meshing tooth on the upper surface It is smaller than the tooth top area of a single meshing tooth on the lower end face.
作为优选：所述啮合齿为横向锯齿，且在齿的垂直方向开有三角形截面的槽，有效防止所述椎间融合器的左右移动；所述横向锯齿的截面为类三角形，其中与植入方向相背的边为内凹的弧线，更有效防止所述椎间融合器的后移。As a preference: the meshing teeth are transverse serrations, and there are grooves with triangular cross-sections in the vertical direction of the teeth, effectively preventing the left and right movement of the intervertebral cage; The sides opposite to each other are concave arcs, which can more effectively prevent the backward movement of the intervertebral cage.
作为优选：所述前壁和后壁与上端面与下端面结合处设有符合生理解剖结构的倒圆或倒角。As a preference: the joints of the front wall and the rear wall and the upper end surface and the lower end surface are provided with rounding or chamfering conforming to the physiological anatomical structure.
作为优选：所述椎间融合器还包括辐射不透明标记，该辐射不透明标记构造用于以X射线图像来标识所述椎间融合器。Preferably: the intervertebral fusion device further comprises a radiopaque marker configured to identify the intervertebral fusion device in an X-ray image.
作为优选：由所述上端面和下端面所成型的平均平面形成能够矫正脊柱缺陷的角度α。Preferably: the average plane formed by the upper end surface and the lower end surface forms an angle α capable of correcting spinal defects.
作为优选：所述左侧壁与所述右侧壁分别对称开设有双圆孔，所述的双圆孔之间由梯形孔隙贯通，梯形的两条腰分别与上端面和下端面所形成的平均平面平行。As a preference: the left side wall and the right side wall are respectively symmetrically provided with double round holes, and the trapezoidal holes are connected between the double round holes, and the two waists of the trapezoid are respectively connected with the upper end surface and the lower end surface. The average plane is parallel.
作为优选：所述后壁开设有双螺孔，供所述椎间融合器从椎间盘正前方或侧前方植入。As a preference: the rear wall is provided with double screw holes for the intervertebral fusion device to be implanted from the front or side front of the intervertebral disc.
与现有技术相比，本发明的有益效果:Compared with prior art, beneficial effect of the present invention:
⑴椎间融合器的上、下端面大部有啮合齿，有利于所述椎间融合器的椎间移植，并能增强椎间融合器在椎间隙中的固定作用。(1) Most of the upper and lower end surfaces of the intervertebral fusion device have meshing teeth, which is beneficial to the intervertebral transplantation of the intervertebral fusion device and can enhance the fixation of the intervertebral fusion device in the intervertebral space.
⑵上、下端面啮合齿采取非对称设计，减小下端面啮合齿齿顶的总面积，增大下端面啮合齿与上终板接触面压应力，促进器体上、下端面的啮合齿同时咬紧对应的椎体终板，增强融合器在椎间隙内的固定效果(2) The meshing teeth on the upper and lower surfaces are asymmetrically designed to reduce the total area of the tooth tops of the meshing teeth on the lower surface, increase the compressive stress on the contact surface between the meshing teeth on the lower surface and the upper end plate, and promote the simultaneous engagement of the meshing teeth on the upper and lower surfaces of the body Bite the corresponding vertebral body endplate to enhance the fixation effect of the cage in the intervertebral space
⑶椎间融合器前端面中央内凹，为神经根留出足够的缓冲距离，防止椎间融合器前移压迫神经根，同时前端面两侧可覆盖在机械强度更好的终板后外侧。(3) The center of the front end of the intervertebral fusion is concave, leaving enough buffer distance for the nerve root to prevent the intervertebral fusion from moving forward and compressing the nerve root. At the same time, both sides of the front end can be covered with the posterolateral endplate with better mechanical strength.
⑷椎间融合器上、下端面与终板中央(终板原先与髓核接触处)接触处设计成平均平面；而在与终板四周(终板原先与纤维环接触处)接触处，依据终板四周内侧不同的倾斜度，设计与之相适应的平面或弧面。这种阶梯面的设计相对于单一的弧面或者平面可实现与终板更好的解剖学贴合。(4) The contact between the upper and lower end surfaces of the intervertebral fusion cage and the center of the endplate (where the endplate originally contacts the nucleus pulposus) is designed to be an average plane; while the contact with the periphery of the endplate (where the endplate originally contacts the annulus fibrosus) is designed according to Different inclinations around the inner side of the endplate, design a plane or arc to suit it. Compared with a single arc or plane, this stepped surface design can achieve a better anatomical fit with the endplate.
附图说明Description of drawings
图1是本发明中前路腰椎椎间融合器轴测图；Fig. 1 is an axonometric view of the anterior lumbar intervertebral fusion device of the present invention;
图2是本发明中前路腰椎椎间融合器左视图；Fig. 2 is the left view of the anterior lumbar intervertebral fusion device of the present invention;
图3是本发明中前路腰椎椎间融合器俯全剖图。Fig. 3 is a vertical cross-sectional view of the middle-anterior lumbar intervertebral fusion device of the present invention.
主要组件符号说明：Description of main component symbols:
具体实施方式Detailed ways
本发明下面将结合附图作进一步详述：The present invention will be described in further detail below in conjunction with accompanying drawing:
请参阅图1所示，本发明提供的前路腰椎椎间融合器，整体呈现为马蹄形，包括与上、下相邻椎体终板接触且笔直的上端面1、下端面2，长边方向上笔直的左侧壁3、右侧壁4，和短边方向的前端面5和后端面6；前端面5为内凹，可为神经根预留充足的空间，后端面6外凸，设有两个螺纹孔61、62，可供在椎间盘正前方或侧前方植入。Please refer to Fig. 1, the anterior lumbar intervertebral fusion device provided by the present invention is in the shape of a horseshoe as a whole, including an upper end surface 1 and a lower end surface 2 that are in contact with the upper and lower adjacent vertebral body endplates, and the long side direction The upper straight left side wall 3, the right side wall 4, and the front end surface 5 and the rear end surface 6 in the direction of the short side; There are two threaded holes 61, 62, which can be implanted directly in front of the intervertebral disc or on the side.
请参阅图1、图2所示，上端面1、下端面2之间贯穿有一个中央垂直开口7，可让骨移植物或替代物在里面生长，开口的截面形状为马蹄形。Please refer to Fig. 1 and Fig. 2, there is a central vertical opening 7 running through the upper end surface 1 and the lower end surface 2, allowing bone grafts or substitutes to grow inside, and the cross-sectional shape of the opening is horseshoe-shaped.
请参阅图2、图3所示，上端面锯齿11齿顶与上椎体下终板接触面积小于下端面锯齿21齿顶与下椎体上终板接触面积，上端面有六行横向锯齿11，锯齿的垂直方向开有五条截面为三角形的槽。下端面有九行横向锯齿21，锯齿21的垂直方向开有五条截面为三角形的槽。上端面1单行锯齿11齿顶的面积等于下端面2单行锯齿21齿顶的面积。Please refer to Fig. 2 and Fig. 3, the contact area between the crests of the serrations 11 on the upper end surface and the lower endplate of the upper vertebra is smaller than the contact area between the crests of the serrations 21 on the lower end face and the upper endplate of the lower vertebral body, and there are six rows of transverse serrations 11 on the upper end surface , there are five grooves with triangular cross-section in the vertical direction of the sawtooth. There are nine rows of transverse serrations 21 on the lower end surface, and five grooves with triangular cross-sections are arranged in the vertical direction of the serrations 21. The area of the crests of the single-row sawtooth 11 on the upper end face is equal to the area of the crests of the 21 single-row serrations on the lower end face 2 .
请参阅图3所示，上端面锯齿11、下端面锯齿21的截面形状均为类三角形，与植入方向相背的边为内凹的圆弧，可增强融合器的防脱能力。Please refer to FIG. 3 , the cross-sectional shapes of the upper serrations 11 and the lower serrations 21 are triangular, and the side opposite to the implantation direction is a concave arc, which can enhance the anti-dropping ability of the cage.
请参阅图2所示，前端面5和后端面6在与上端面1、下端面2结合处由带有倾斜角的平面50、51或圆弧面52、53过渡，增大融合器两端与终板四周的接触面积，得到更好的力学支撑。Please refer to Fig. 2, the front end surface 5 and the rear end surface 6 are transitioned by planes 50, 51 or arc surfaces 52, 53 with inclined angles at the joints with the upper end surface 1 and the lower end surface 2, increasing the size of the two ends of the cage. The contact area with the end plate gets better mechanical support.
请参阅图3所示，椎间融合器内辐射不透明的显影销80、81、82成直角三角形分布，贯穿上下端面。Please refer to FIG. 3 , the radiation-opaque developing pins 80 , 81 , 82 in the intervertebral cage are distributed in a right-angled triangle and run through the upper and lower end surfaces.
请参阅图3所示，椎间融合器的上端面1与下端面2形成平均平面所成夹角α，帮助矫正脊柱缺陷。Please refer to FIG. 3 , the angle α formed by the average plane formed by the upper end surface 1 and the lower end surface 2 of the intervertebral cage helps to correct spinal defects.
请参阅图3所示，椎间融合器的左侧壁3、右侧壁4开有两个大小不一的孔31，开孔间有梯形孔隙32穿过，梯形的两条腰33分别和上端面1、下端面2所形成的平均平面平行。Please refer to Fig. 3, the left side wall 3 and the right side wall 4 of the intervertebral cage have two holes 31 of different sizes, and there is a trapezoidal hole 32 passing through the holes, and the two trapezoidal waists 33 are respectively connected with the The average plane formed by the upper end surface 1 and the lower end surface 2 is parallel.
请参阅图3所示，椎间融合器的后端面6开有两个螺纹孔61、62，一个螺纹孔62在所述椎间融合器后端面6正前方，另一个螺纹孔61在所述椎间融合器后端面6的左侧前方，可供所述椎间融合器从椎间盘正前方或侧前方植入。Please refer to Fig. 3, the rear end face 6 of the intervertebral cage has two threaded holes 61, 62, one threaded hole 62 is in front of the rear end face 6 of the intervertebral cage, and the other threaded hole 61 is in the The front left side of the rear end surface 6 of the intervertebral cage can be used for implanting the intervertebral cage from directly in front of the intervertebral disc or from the front side.
请参阅图3所示，椎间融合器的后端面6右侧前方开有一个圆孔63，与左侧前方螺纹孔61与正前方螺纹孔62对称。Please refer to FIG. 3 , there is a round hole 63 on the front right side of the rear end surface 6 of the intervertebral cage, which is symmetrical to the left front threaded hole 61 and the front threaded hole 62 .
以上所述仅为本发明的较佳实施例，凡依本发明权利要求范围所做的均等变化与修饰，皆应属本发明权利要求的涵盖范围。The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350606.8ACN108056847A (en) | 2017-12-15 | 2017-12-15 | For the preceding road lumbar intervertebral fusion device of intervertebral fusion |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350606.8ACN108056847A (en) | 2017-12-15 | 2017-12-15 | For the preceding road lumbar intervertebral fusion device of intervertebral fusion |
| Publication Number | Publication Date |
|---|---|
| CN108056847Atrue CN108056847A (en) | 2018-05-22 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711350606.8APendingCN108056847A (en) | 2017-12-15 | 2017-12-15 | For the preceding road lumbar intervertebral fusion device of intervertebral fusion |
| Country | Link |
|---|---|
| CN (1) | CN108056847A (en) |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication | Application publication date:20180522 |