CN103458831A - 挠性脊柱植入物 - Google Patents

挠性脊柱植入物 Download PDF

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CN103458831A
CN103458831A CN2011800604701A CN201180060470A CN103458831A CN 103458831 A CN103458831 A CN 103458831A CN 2011800604701 A CN2011800604701 A CN 2011800604701A CN 201180060470 A CN201180060470 A CN 201180060470A CN 103458831 A CN103458831 A CN 103458831A
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section
implant
receptacle
pivot axis
sections
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R·A·海因斯
K·E·米勒
K·于
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Warsaw Orthopedic Inc
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Warsaw Orthopedic Inc
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    • A61F2/00Filters 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
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    • A61F2/442Intervertebral or spinal discs, e.g. resilient
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Abstract

一种用于定位在脊椎构件之间形成的空间内的脊柱植入物。该植入物包括在枢转轴处可枢转地附连在一起的多个部段。枢转轴线包括连接件,这些连接件穿过部段的至少一部分,并构造成使部段可枢转地附连,以使植入物挠曲以便于插入该空间内,并构造到该空间。部段中的一个可包括包含在该部段内的接纳部。该接纳部具有固定的尺寸和形状,并保持骨生长材料。接纳部的固定的尺寸和形状防止骨生长材料在植入物挠曲过程中逸出。

Description

挠性脊柱植入物
背景技术
本申请涉及用于插入脊椎构件之间的植入物,并更具体地涉及具有可枢转地附连在一起的两个或更多个部段的植入物。
脊柱被分成四个区域,这四个区域包括颈部、胸部、腰部和骶尾区域。颈部区域包括顶部七个脊椎构件,这七个脊椎构件被称为C1-C7。胸部区域包括被称为T1-T2的接下来十二个脊椎构件。腰部区域包括五个脊椎构件L1-L5。骶尾区域包括形成骶骨和尾骨的九个融合脊椎构件。脊柱的脊椎构件以包括颈弯、胸弯和腰弯的弯曲构造对准。椎间盘定位在脊椎构件之间,并允许屈曲、延伸、侧弯和转动。
各种状况会造成对椎间盘和/或脊椎构件的破坏。破坏会由于多种状况而发生,这些状况包括但不限于创伤之类的特定事件、退化病症、肿瘤或感染。对椎间盘和脊椎构件的破坏会造成疼痛、神经缺陷和/或活动力丧失。
各种手术包括置换整个脊椎构件或其一部分、整个椎间盘或其一部分或两者。可插入一个或多个置换植入物,以置换受损的脊椎构件和/或椎间盘。植入物构造成插入椎间空间内,并与其余相邻的脊椎构件接触。植入物减少或消除疼痛和神经缺陷,并增大活动范围。
植入物应包括可调节的形状以便于插入患者体内并放置于脊椎构件之间。此外,脊柱的曲率和脊椎构件的总体形状会使植入物难以与相邻的脊椎构件充分接触。需要构造成与脊柱解剖体匹配以在植入到椎间空间内时稳固接触的植入物。
发明内容
本申请涉及挠性脊柱植入物。脊柱植入物可包括许多部段,各个部段具有远端和近端以及上侧和下侧。部段中的一个可包括受限于该部段内部的接纳部,并具有固定的尺寸和形状。接纳部可在上侧和下侧上开口。铰链将各个部段以端对端和铰接的结构可枢转地连接在一起。各个铰链可使得部段中的两个连接在一起。铰链可沿平面对准。接纳部可横向于该平面对准,并穿过该平面。接纳部可沿背离该平面的两个方向开口。
该植入物还可包括可枢转地附连在一起并以端对端的定向对准的部段,各个部段具有上侧和下侧。部段中的第一个可包括接纳部,该接纳部包含在部段内部,并具有远侧壁、近侧壁和侧面壁。接纳部可在上侧和下侧上开口。第一部段和第二部段可以在穿过接纳部的枢转轴线处可枢转地连接。枢转轴线可包括穿过第一和第二部段中的第一部分的第一连接件和穿过第一和第二部段中的第二部分的第二连接件。第一和第二连接件可沿枢转轴线间隔开位于接纳部内的间隙。
植入物还可包括第一和第二部段,它们分别具有远端和近端,在端部之间延伸的侧面以及上侧和下侧。接纳部可包含在第一部段的内部内,并具有固定的尺寸和形状。接纳部可具有连续侧壁,并可在上侧和下侧上开口。铰链可以在各个部段的远端和近端之间穿过第一和第二部段中的每个的侧面。铰链可沿枢转轴线可枢转地连接第一和第二部段。铰链可将各部段以端对端的构造定位,而纵向轴线穿过各个部段的远端和近端,并位于上侧和下侧之间和各个侧面之间。枢转轴线可穿过接纳部,并穿过纵向轴线。
可根据需要而单独地或以任何组合来使用各个实施例的各个方面。
附图说明
图1是处于平直定向的挠性脊柱植入物的立体图。
图2是图1所示挠性脊柱植入物的分解图。
图3是处于枢转定向的图1所示挠性脊柱植入物的立体图。
图4是图1所示挠性脊柱植入物的侧视图。
图5是挠性脊柱植入物的俯视图。
图6是挠性脊柱植入物的俯视图。
图7是具有扩大长度段的连接件的立体图。
图8是挠性脊柱植入物的俯视图。
图9是挠性脊柱植入物的后视图。
图10是沿线X-X剖取的、图1所示挠性脊柱植入物的剖视图。
图11是处于平直定向的挠性脊柱植入物的立体图。图12是图11所示挠性脊柱植入物的分解图。图13是插入工具内的植入物的侧视图。
图14是定位在脊椎构件之间的椎间空间内的植入物的侧视图。
图15是挠性脊柱植入物的侧视图。
图16是处于平直定向的挠性脊柱植入物的立体图。
具体实施方式
本申请涉及挠性脊柱植入物。植入物包括在枢转轴线处可枢转地附连在一起的两个或更多个部段。枢转轴给予植入物定位在各种定向下的灵活度。灵活度可便于植入物插入脊椎构件之间,并还可允许植入物顺应于椎间空间的形状。
图1-10示出了具有细长形状的、由部段20、30、40、50构成的挠性植入物10。植入物10包括远端11和相对的近端12,起初将该远端插入脊椎构件之间的空间内。细长形状给予植入物10纵向中心线C,该纵向中心线穿过端部11、12以及部段20、30、40、50延伸。植入物10还包括沿纵向中心线C延伸的侧面18、19。植入物10的侧面18、19可包括凸曲率。在一个实施例中,曲率具有约106毫米的半径。植入物10还包括上侧16和下侧17。上侧16和下侧17可包括与脊椎构件配合的齿。
部段20、30、40、50在枢转轴线60、61、62处附连在一起。具体来说,部段20和30在枢转轴线60处附连在一起,部段30和40在枢转轴线61处附连在一起,而部段40和50在枢转轴线62处附连在一起。枢转轴线60、61、62穿过中心线C延伸。在一个实施例中,枢转轴线60、61、62垂直于中心线C。
图1和4示出了处于平直定向的植入物10。部段20、30、40、50对准,以使植入物10呈大致平坦形状。部段20、30、40、50的形状可彼此互补,其中,上表面121、131、141、151和下表面122、132、142、152大致对准。
植入物10可运动到多种不同的枢转定向。这些定向包括使部段20、30、40、50中的一个或多个离开平直定向枢转。图3包括在一个枢转定向下的植入物10,各个部段20、30、40、50绕它们对应的枢转轴线60、61、62枢转。图3具体包括处于枢转定向下的植入物10,其中,部段20、30绕枢转轴线60枢转的量小于部段30和40绕枢转轴线61枢转的量以及部段40和50绕枢转轴线62枢转的量。对应的部段20、30、40、50之间的枢转量可相应地调节成将植入物10插入椎间空间内,并适应空间的形状。
图2示出了植入物10的分解图。各个部段20、30、40、50的形状和尺寸设计成可枢转地连接到相邻部段。部段20定位在植入物10的远侧部段处,并包括远端11。远端11可包括渐缩形状,该渐缩形状便于插入脊椎构件之间的空间内。部段20包括沿向近侧方向延伸的一对间隔开的臂部23、24。臂部23、24包括便于相对于部段30作枢转运动的弯曲的近端26、27。臂部23、24的面向纵向中心线C的内表面可以是大致平滑的,以进一步便于相对于部段30作枢转运动。孔25穿过各个臂部23、24,以形成轴线60的一部分。部段20还包括第一表面121和相对的第二表面122。齿可定位在一个或两个表面121、122上,以将植入物10的位置保持在椎间空间内。
部段30定位在近侧,并与部段20相邻。部段30包括第一表面131和相对的第二表面132。表面131、132可包括齿。部段30还沿纵向中心线C轴向分成第一部分31和第二部分32。第一部分31包括垂直于中心线C测定的宽度,以配合在间隔开的臂部23、24之间。第一部分31包括朝向部段20定位的面33。该面33可以是平坦的或可具有弯曲形状。第一部分31还包括离开纵向中心线C面向外的相对的侧面90。侧面90可以是大致平滑的,并与臂部23、24的内表面接触。孔36穿过各个侧面90,并形成轴线90的一部分。
接纳部35从第一表面131经过部段30穿到第二表面132。接纳部35完全包含在部段30内,并包括固定的形状。接纳部35构造成保持骨生长材料以便于与脊椎构件融合。固定的形状造成骨生长材料在植入物10挠曲期间留在接纳部35内。形成轴线60的一部分的孔36可延伸到接纳部35内。沿纵向中心线C延伸的孔34也可延伸到接纳部35内。
第二部分32包括垂直于纵向中心线C测定的、比第一部分31大的宽度。壁91面向远侧方向,并侧向露出超过第一部分31的侧面90。壁91包括与部段20的臂部23、24的弯曲端部26、27大致匹配的弯曲形状。弯曲端部26、27在部段20、30之间进行枢转运动过程中沿壁91或在其附近滑动。
部段32还包括沿向近侧方向延伸的一对间隔开的臂部37、38。臂部37、38包括便于相对于部段40作枢转运动的弯曲的近端。臂部37、38的面向纵向中心线C的内表面可以是大致平滑的,以进一步便于相对于部段40作枢转运动。孔39穿过各个臂部37、38以形成轴61的一部分。近侧孔34穿过壁91并延伸到臂部37、38之间的空间内。
第三部段40定位在第二部段30近侧并与其相邻。部段40包括第一表面141和相对的第二表面142。部段40包括从面向部段30的远端41延伸的轴向长度以及相对的近端42。
接纳部43整个包含在部段40的内部内,并穿过第一和第二表面141、142延伸。接纳部43包括在植入物10挠曲过程中不变化的固定形状。接纳部43包括被孔47、48中断的内表面。形成轴线61的一部分的孔47和形成轴线62的一部分的孔48可延伸到接纳部43内。位于近端和远端41、42处的孔49沿中心线C延伸,并通入接纳部43。
部段40还包括一对突出部44,该对突出部离开轴线中心线C侧向向外延伸。突出部44包括面向部段30的远侧表面45。远侧表面45可弯曲并与臂部37、38的端部的形状大致匹配。突出部44还包括面向部段50的近侧表面46。近侧表面46还可包括对应于部段50的弯曲形状。
部段50定位在植入物10的近侧部段处,并包括近端12。部段50包括第一表面151和相对的第二表面152。齿可定位在一个或两个表面151、152上,以将植入物10的位置保持在椎间空间内。部段50包括沿向远侧方向延伸的一对间隔开的臂部51、52。臂部51、52包括弯曲的远端54、55,这些远端与近侧表面46匹配,并便于相对于部段40作枢转运动。臂部51、52的面向纵向中心线C的内表面可以是大致平滑的,以进一步便于相对于部段40作枢转运动。孔53穿过各个臂部51、52以形成轴62的一部分。近侧壁可包括用于使植入物10与插入器械连接的孔56。该孔56可沿纵向中心线C定位。孔56可带有螺纹,以与插入器械上的对应螺纹配合。
附连构件70的尺寸可设计成配合到孔56内。附连构件70可包括扩大凸缘71和向外延伸的轴杆72。扩大凸缘71可抵靠部段50的内表面,以防止附连构件70在附连过程中借助插入器械拉过孔56。轴杆72可带螺纹,以与孔上的对应螺纹配合。轴杆72的背向凸缘71的端部可包括接纳部,以附连到如下所述的插入器械。
枢转轴线60、61、62由一个或多个连接件80来形成。连接件80包括细长形状以穿过部段20、30、40、50中的两个的至少一部分。连接件的尺寸也设计成配合到沿枢转轴线60、61、62对准的部段20、30、40、50内的各个孔内。可在植入物10内采用各种类型的连接件80。植入物10内的各个连接件80可以是相同的,或者两个或更多个不同的连接件80可用于植入物10。
如图2所示,连接件80可包括具有向外延伸的轴杆82的扩大头部81。轴杆81可包括与头部81相邻的较大的第一部段和较小的第二部段。第一部段可带螺纹,以与它所插入的孔内的对应螺纹配合。借助示例,形成第一枢转轴线60的连接件80可螺纹连接到第一部段20内的孔25上。连接件80还包括与头部81相对的端部84。接纳头部的部段上的各种孔可包括用于头部81的沉头形状,以在部段的外侧面下方凹入。
部段20、30、40、50以端对端和交叠的结构对准,以使各个孔沿对应的枢转轴线60、61、62对准。第一和第二部段20、30与孔25交叠,而第一部段20与第二部段30内的对应孔36对准。第一连接件80穿过中心线C的第一侧面上的对准孔25、36,而第二连接件80穿过位于相对的侧面上的对准孔25、36。
相似地,第二和第三部段30、40交叠,并且各个孔沿枢转轴线61对准。枢转轴线61由第一连接件80和第二连接件80形成,该第一连接件80穿过中心线C的第一侧面上的对准孔39、47,而第二连接件80穿过位于相对的侧面上的对准孔39、47。
第三和第四部段40、50交叠,并且对应的孔对准以形成枢转轴线62。第一连接件80穿过中心线C的第一侧面上的对准孔48、53,而第二连接件80穿过位于中心线C的第二侧面上的对应孔48、53。枢转轴60、61、62中的一个或多个可垂直于纵向中心线C。在一个实施例中,枢转轴线60、61、62平行。
图5是植入物10的俯视图,该图示出了枢转轴线60、61、62相对于部段20、30、40、50的位置。部段20、30、40、50以端对端的定向设置,其中,相邻部段处于交叠定向。第一部段20与第二部段30交叠,而枢转轴线60穿过第二部段30内的接纳部35延伸。第二部段30与第三部段40交叠,而枢转轴线61穿过第三部段40内的接纳部43延伸。相似地,第三部段40与第四部段50交叠,而枢转轴线62也穿过接纳部43延伸。
图5中的连接件80包括留在部段20、30、40、50的壁内的长度段,而端部84离开接纳部35、43定位。连接件80还可起到插头作用,以填充部段30、40的壁内的孔36、47、48,并防止放置于接纳部35、43内的骨生长材料逸出。在一个实施例中,端部84定位成与接纳部35、43的壁齐平。图6示出了连接件80具有较大长度的实施例,其中,端部84延伸到接纳部35、43内。
在图5和6的实施例中,连接件80沿对应的枢转轴线60、61、62间隔开。在连接件80的端部84之间形成间隙。该间隙定位在对应的接纳部35、43内。
图7示出了用于植入物10的另一连接件80。连接件80包括在头部81和84之间测定的扩大长度段。连接件80的长度使得单个连接件形成对应的枢转轴线60、61、62。该长度还使连接件80穿过对应的接纳部35、43。螺纹部86可位于端部84处或附近,以与一个部段内的对应孔上的螺纹配合。借助示例,如果连接件80用于形成枢转轴线60,则头部81定位在孔25处,而螺纹部86与接纳部35的另一侧的相对螺纹孔配合。该长度还可使端部84定位成侧向向外超出部段20的侧面,其中,单独的紧固件(例如,螺母、垫圈、锁定盖)装在螺纹部86上,以保持附连。
图8示出了具有细长连接件80的植入物10的俯视图。连接件80穿过接纳部35、43延伸。
枢转轴线60、61、62可沿一平面延伸,该平面在上表面16和下表面17之间切过部段20、30、40、50。接纳部35、43横向于该平面,并穿过延伸。
植入物10可构造成部段20、30、40、50沿两个相对的方向离开该平面枢转。这允许部段20、30、40、50沿第一方向(如图3中所示)向上枢转,并还沿第二方向向下枢转。部段20、30、40、50中的一个或多个还可构造成防止沿两个方向中的一个的枢转运动。这种选择性枢转可由形成枢转轴线60、61、62的孔和连接件80的形状来引起。选择性枢转还可由部段20、30、40、50的形状引起。借助示例,第二部段30的侧表面91可成形为与臂部23、24的下表面133接触,并防止沿第二、向下方向运动。一个或多个部段20、30、40、50还可构造成限制沿一个或两个方向的运动量。
图9包括植入物10的后视图。在上侧和下侧16、17之间测定的侧面19高度H1比相对的侧面18的高度H2大。上侧和下侧16、17形成一角度,以适应脊柱的曲率和/或椎间空间的形状。在一个实施例中,上侧面和下侧面16、17形成约6°的角度。其它实施例可包括高度比相对的侧面18小的侧面19。或者,高度H1、H2可以基本上相等。上侧面和下侧面16、17中的一个或两个可包括凸曲率。该曲率可包括范围在约200-350毫米之间范围内的半径。
如图4中所示,在上侧和下侧16、17之间测定的高度可以向植入物10的纵向中心最大。在此实施例中,部段30和40包括比部段20和50大的高度。
图10是植入物10的纵向剖视图。中心纵向开口穿过植入物10的长度。开口由对应部段20、30、40、50内的孔28,34,49,56来形成。当植入物10处于如图10中所示的平直构造时,中心开口沿纵向中心线C对准。
植入物可包括各种数目的部段。图1-10中所述的实施例分别包括在枢转轴60、61、62处附连在一起的四个部段20、30、40、50。图11和12示出了具有沿两个枢转轴线260、261附连在一起的三个部段220、230、240的植入物200。枢转轴线260、261设计成给予植入物200灵活度。
部段220、230通过第一对连接件280在枢转轴线260处可枢转地附连在一起,而部段230、240通过第二对连接件280在枢转轴线261处可枢转地附连在一起。
植入物200还包括部段230内的第一接纳部231和部段240内的第二接纳部241。在此实施例中,枢转轴线260穿过接纳部231延伸,而枢转轴线261穿过接纳部241延伸。
图13示出了插入患者体内的植入物10。植入物10的尺寸设计成插入脊椎构件400之间的椎间空间401内。插入工具300用于将植入物10放置于空间401内。插入工具300包括一对间隔开的臂部302。臂部302包括分别大致平直的近侧部段310和远侧部段311。部段310、311在形成角度a的肘部312处连接。在一些实施例中,角度a可在约120°到约165°之间的范围变化。臂部302可包括导轨或其它结构以与植入物10配合,并还允许植入物10沿臂部302纵向运动。
止挡件304离开在臂部302之间形成的中心线向外延伸。止挡件304控制远侧部段311插入椎间空间401内的量。图13示出了插入工具300完全插入椎间空间401内,其中,止挡件304与脊椎构件400接触,并且臂部302的远端305定位在椎间空间401内。
推动构件303定位在臂部302之间。推动构件303沿臂部302的至少近侧部段310的纵向长度运动,以使植入物10运动到椎间空间401内。推动构件303包括远端,该远端与安装在植入物10内的附连构件70配合。
使用时,插入工具300相对于脊椎构件400和椎间空间401定位。植入物10可以在对准过程中安装在工具300内,或者可以在对准之后安装在工具300内。在任一情况下,可将骨生长材料放置于一个或两个接纳部35、43内。
植入物10由通过推动构件303施加的力沿近侧部段310的长度运动。当植入物是近侧部段310时,植入物10的各部段可对准在平直定向下(即,各个部段成一直线,在各个枢转轴线60、61、62处定义为具有0°角)。当植入物10运动通过肘部312时,植入物10在枢转轴线60、61、62处枢转。在一些实施例中,植入物10能在各个枢转轴线60、61、62处枢转达到约90°。这种灵活度允许植入物10运动经过肘部312,并运动到远侧部段311。由于接纳部35、43包含于部段的其中一个,所以它们的形状和尺寸在植入物10的枢转运动期间不改变。这将骨生长材料保持在接纳部35、43内。
一旦植入物10定位在椎间空间401内,移除插入工具300。这包括从植入物10拆下推动构件303,并从患者体内移除工具300。如图14中所示,植入物10灵活适应于空间401的形状,并与椎间构件400接触。
植入物10可沿两个相对的方向挠曲。图13示出了沿第一方向挠曲的植入物10。沿第二方向挠曲的量可等于或小于沿第一方向挠曲的量。在一个实施例中,沿第一方向挠曲的量为离开对准定向约90°(定义为+90°角),而沿第二方向挠曲的量为离开对准定向约5°(定义为-5°角)。此外,在沿植入物长度的各种枢转轴线处,挠曲量可以是相同或不同的。借助示例,在枢转轴线60处的挠曲量可以大于在枢转轴线62处的量。
植入物10可以多种不同方式插入患者体内,诸如用DLIF方法和ALIF方法。各种其它方法也可用于植入物10。植入物10的挠曲度适应各种绕解剖体特征的方法和运动,诸如骼脊和肋骨。可沿包括胸部、腰部和骶尾区域的脊柱的各个区域采用植入物10。
在美国申请序列号12/533,877和12/605,415中公开了挠性脊柱植入物和将挠性植入物插入患者体内的其它实施例,这些申请整个地转让给本申请。这两个申请的全部内容以参见的方式纳入本文。
图4包括具有在与相连部段大致匹配的相对的上表面和下表面121和122、131和132、141和142、151和152。这给予植入物10总体连续的上侧和下侧。植入物10还可包括具有不同高度的一个或多个部段,因而,上侧和下侧中的一个或两个不是连续的。图15包括具有与相邻部段50不同的高度的部段40。在此实施例中,植入物的总体上侧面和下侧面在部段40和50之间的接合处不连续。其它实施例可包括植入物10的仅单侧(例如,上侧或下侧)是不连续的。其它实施例包括具有与相邻部段不同高度的两个或更多个部段,以使总体下侧面和上侧面不连续。
植入物10可根据应用具有不同形状。图1包括具有从顶部和底部看大致矩形形状的植入物10。图16包括具有从顶部和底部看呈圆形的植入物10。
在活体患者上进行外科手术过程中可采用各种植入物和插入工具。这些还可用于非活体情况,诸如尸体、模型等内。活体情况可用于测试、训练以及示范目的中的一种或多种。
诸如“之下”、“下方”、“下部”、“之上”、“上部”之类的空间关系术语用于易于描述,来解释一个构件相对于第二构件的定位。这些术语用来包括除了附图中示出的不同取向以外的该装置的不同取向。此外,诸如“第一”、“第二”之类的术语也用于描述各种构件、区域、部段等并且也并不意指进行限制。类似的术语在全文的描述中指代类似的构件。
如本文所使用的,术语“具有”、“容纳”、“包含”、“包括”之类是开放性术语,而开放性术语指代存在所陈述构件或特征,但并不排除附加的构件或特征。冠词“一”、“一个”和“该”意指包括复数以及单数,除非文中清楚地另有说明。
能以除了本文所阐述以外的其它特定方式来执行本发明,而不会偏离本发明的范围和基本特征。因此,本发明的实施例被认为在所有方面仅是示例性的而非限制性的,并且符合所附权利要求的意思和等同范围的所有变化意指包含在本文中。

Claims (15)

1.一种脊柱植入物,包括:
多个部段,各个部段具有远端和近端,各个部段还具有上侧和相对的下侧,所述部段中的第一个包括受限于第一部段内部的接纳部,并具有固定的尺寸和形状,而所述接纳部在所述上侧和下侧上开口;
多个铰链,所述铰链将所述部段以端对端和铰接的结构可枢转地连结在一起,所述多个铰链中的每个使所述多个部段中的两个连接在一起,所述多个铰链沿平面对准;
所述接纳部横向于所述平面对准,并穿过所述平面,所述接纳部沿背向所述平面的两个方向开口。
2.如权利要求1所述的植入物,其特征在于,纵向中心线穿过各个部段的远端和近端,穿过多个铰链中的每个,并穿过所述接纳部。
3.如权利要求1所述的植入物,其特征在于,使所述部段中的第一个和所述部段中的第二个相连接的第一个铰链穿过所述接纳部。
4.如权利要求3所述的植入物,其特征在于,使所述部段中的第一个和所述部段中的第三个相连接的第二个铰链穿过所述接纳部,所述第一铰链和第二铰链在所述接纳部内彼此间隔开。
5.如权利要求1所述的植入物,其特征在于,所述多个铰链中的至少一个包括间隔开一间隙的第一和第二连接件。
6.如权利要求1所述的植入物,其特征在于,所述部段中的第二个包括受限于第二部段内部的另一接纳部,并具有固定的尺寸和形状,而所述接纳部在所述上侧和下侧上开口。
7.一种脊柱植入物,包括:
多个部段,所述部段可枢转地附连在一起并以端对端定向对准,各个部段具有上侧和下侧;
部段中的第一个包括受限于第一部段内的接纳部,并具有远侧壁、近侧壁和侧面壁,所述接纳部在所述上侧和下侧上开口;
所述第一部段和所述部段中的第二个在枢转轴线处可枢转地连接,所述枢转轴线穿过所述接纳部延伸,所述枢转轴线包括穿过所述第一和第二部段中的第一部分的第一连接件和穿过所述第一和的第二部段中的第二部分的第二连接件;
所述第一和第二连接件沿所述枢转轴线间隔开位于所述接纳部内的间隙。
8.如权利要求7所述的植入物,其特征在于,所述第一和第二连接件穿过所述侧面壁延伸,并延伸到所述接纳部内。
9.如权利要求7所述的植入物,其特征在于,所述第一和第二部段包括第一对孔以及第二对孔,所述第一对孔沿所述枢转轴线对准,并接纳所述第一连接件,所述第二对孔沿所述枢转轴线对准,并接纳所述第二连接件。
10.如权利要求7所述的植入物,其特征在于,所述枢转轴线在所述第一部段的上侧和下侧之间延伸。
11.如权利要求7所述的植入物,其特征在于,所述多个部段包括第三部段,所述第三部段从所述第二部段附连到所述第一部段的相对侧,所述第三部段在也穿过所述接纳部的另一枢转轴线处可枢转地附连到所述第一部段。
12.如权利要求7所述的植入物,其特征在于,所述第二部段包括成对的间隔开的凸缘,所述凸缘与所述第一部段交叠,所述枢转轴线穿过所述凸缘。
13.如权利要求7所述的植入物,其特征在于,还包括纵向开口,所述开口沿所述多个部段的纵向长度延伸,所述纵向开口由所述多个部段中的每个部段内的至少一个孔形成,所述纵向开口关于所述植入物的纵向中心线居中。
14.一种脊柱植入物,包括:
第一和第二部段,各个部段分别具有远端和近端、在端部之间延伸的侧面以及上侧和下侧;
接纳部,所述接纳部包含在所述第一部段内部,并具有固定的尺寸和形状,所述接纳部具有连续侧壁,并在所述上侧和下侧上开口;
铰链,所述铰链在各个部段的所述远端和近端之间穿过所述第一和第二部段中的每个的侧面,所述铰链沿所述枢转轴线可枢转地连接第一和第二部段,所述铰链使所述部段以端对端的构造定位,而纵向轴线穿过各个部段的远端和近端、并在所述上侧和下侧之间以及各个侧面之间延伸;
所述枢转轴线穿过所述接纳部延伸,并穿过所述纵向轴线延伸。
15.如权利要求14所述的植入物,其特征在于,所述铰链包括一对连接件,所述连接件包括定位在所述部段的侧面处的头部、以及端部,所述一对连接件的所述端部沿所述枢转轴线间隔开一间隙。
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WO2012083173A2 (en) 2012-06-21

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