CN101048116A - 增强或重建椎间盘的植入系统、方法和装置 - Google Patents

增强或重建椎间盘的植入系统、方法和装置 Download PDF

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Publication number
CN101048116A
CN101048116A CNA2005800353731A CN200580035373A CN101048116A CN 101048116 A CN101048116 A CN 101048116A CN A2005800353731 A CNA2005800353731 A CN A2005800353731A CN 200580035373 A CN200580035373 A CN 200580035373A CN 101048116 A CN101048116 A CN 101048116A
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China
Prior art keywords
gripper shoe
intensifier
vertebral endplate
holding device
securing member
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CNA2005800353731A
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Inventor
H·H·特里优
L·K·李
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Warsaw Orthopedic Inc
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Warsaw Orthopedic Inc
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Publication of CN101048116A publication Critical patent/CN101048116A/zh
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Abstract

一种用于将保持装置与脊椎骨终板相连的增强装置,该增强装置包括具有远端部分的驱动器外壳、延伸通过驱动器外壳并包括柔性轴部分的驱动机构,和在驱动器外壳远端部分的连接机构,该连接机构适合与保持装置相连接。

Description

增强或重建椎间盘的植入系统、方法和装置
背景
椎间盘会由于外伤或疾病而移位或受损,从而导致纤维环破坏,最终使核质(nucleus pulposus)突出到脊髓管中,该病情通常称为椎间盘脱出或椎间盘破裂。突出的核质会压迫在脊髓神经上,导致神经受损、疼痛、麻木、肌肉无力和瘫痪。椎间盘还会因为正常的老化过程而劣化。随着盘脱水硬化,盘隙高度会降低,导致脊椎不稳定、移动性降低以及疼痛。
缓解这些病情症状的治疗手段包括部分或全部的椎间盘切除手术,然后将相邻的椎骨融合起来或是安装一机械运动保护装置。最近,已有尝试用植入物代替盘内的核质。然而,植入物在放入盘隙内后会在盘隙内发生迁移和/或会通过环缺陷从盘隙内排出。因此,需要有修复椎间盘的工具、方法和装置。
概述
在一个实施方案中,用于将保持装置与脊椎骨终板相连的增强装置包括具有远端部分的驱动器外壳,延伸通过驱动器外壳并包括柔性轴部分的驱动机构,以及在驱动器外壳远端部分的连接机构。该连接机构适合与保持装置相连接。
在另一个实施方案中,一种用于防止修补物从椎间盘隙迁移出来的方法,该方法包括提供保持装置,其中该保持装置包括阻挡面,该阻挡面与安装面大致垂直。该方法还包括将阻挡面置于椎间盘隙内以防止修补物迁移,以及将安装面固定在脊椎骨终板上,其中保持装置全部在椎间盘隙内。
附图简述
图1是具有受损椎间盘的脊柱的径向视图。
图2显示了图1的椎间盘。
图3a显示了根据本文一个实施方案的植入系统。
图3b显示了根据本文另一实施方案的植入物。
图3c显示了根据本文另一实施方案的植入物。
图3d显示了根据本文另一实施方案的植入物。
图3e显示了根据本文另一实施方案的植入物。
图3f显示了根据本文另一实施方案的植入物。
图3g显示了根据本文另一实施方案的植入物。
图3h显示了根据本文另一实施方案的植入物。
图3i显示了根据本文另一实施方案的植入物。
图4a显示了图3a的植入系统的截面图。
图4b显示了图3b的植入系统的截面图。
图5显示了根据本发明一个实施方案的增强装置。
图6-10显示了使用该增强装置的方法。
图11显示了根据本发明另一实施方案的增强装置以及该增强装置的使用方法。
详述
本发明总体涉及椎间盘重建装置,更具体地涉及用于保持修复性核质的系统。为了加强理解本发明的原理,下面将参照附图中描述的实施方案或实施例并用具体的文字来对其进行描述。然而,应当理解,它们并不是为了限制本发明的范围。在所述实施方案中的任何改动或对本文所述发明原理的任何进一步应用都被认为是本发明所属领域技术人员通常能够想到的。
首先参看图1,参考号10指具有受损椎间盘12的脊柱,该椎间盘伸展在两个完整椎体14和16之间。椎体14和16分别包括在椎间盘12界面处的脊椎骨终板18和20。现在参看图2,受损的椎间盘12包括核质22,核质周围是纤维环24。对受损盘12的修复涉及用外科手术除去所有或部分受损的盘12,然后安装植入物系统,该系统可包括核质替代物、部分或全部的椎间盘替代物以及用于重建或增加椎间盘隙的其它装置。这些修复步骤可用本领域技术人员已知的前方、前外侧、侧面、后方的方法或其它方法来进行。
现在参看图3a和4a,在一个实施方案中,植入物系统30可包括用于代替所有或部分天然核质22和/或纤维环24内层的假体核32。植入物系统30还可包括一个或多个保持装置,如通过紧固件36与毗邻椎体16相连的支撑板34,该支撑板放置成可防止假体核32通过环缺陷38(如环壁上的开口或强度弱的部分)排出或迁移。另外,植入物系统30可包括位于假体核32和支撑板34之间的一个或多个环面塞40。
假体核32可以是美国专利6,620,196中详细描述的类型,该专利被纳入本文作为参考。在一个实施方案中,如图3a所示,假体核32与产生的盘隙大致吻合,其作为柔性或连接性的间隔物,以防止或减缓盘隙崩溃,同时维持盘的正常生物力学。由于环24难以用外科手术进行修复,因此假体核32具有通过环缺陷38从椎间盘隙排出的倾向。
在该实施方案中,假体核32可用聚合物制成,该聚合物例如是聚氨酯、硅酮和聚氨酯的共聚物、硅酮、聚烯烃橡胶、聚乙烯醇水凝胶、聚丙烯腈基水凝胶、聚丙烯酸基水凝胶或聚氨酯基水凝胶。还可使用天然的组织,包括富含胶原的组织或结缔组织如盘环、阔筋膜、平面筋膜(planar fascia)、前或后十字韧带、髌骨腱、腘腱、四头肌腱、跟骨腱、皮肤和/或心包膜。在其它实施方案中,假体核可以是刚度更高的连接体,其可用例如以下材料制成:聚合物,如超高分子量聚乙烯(UHMWPE)、聚醚醚酮或聚甲基丙烯酸甲酯;金属,如钴-铬合金、钛、钛合金、不锈钢、或钛镍合金;或陶瓷,如氧化铝、氧化锆、多晶金刚石复合片或热解碳。
支撑板34针对假体核32的排出(甚至是通过大的环缺陷38的排出)提供强有力的阻挡作用,其也使参与运动的部分的运动学干扰最小化,从而保持了正常的盘运动。支撑板34可有较小的尺寸和低的光滑度(low profile),通常满足强度较低的机械需求。支撑板34和紧固件36可以整个装配到椎体14、16之间的空隙内,并与终板18、20中的至少一个相连。由于支撑板34可完全置于椎间盘隙内,所以能最大程度地减小毗邻软组织的损伤和结疤。在椎间盘隙内,支撑板34可具有足以阻断核排出但在弯曲/伸展运动中不影响毗邻椎终板的高度39。例如,该高度39可以在2-12毫米之间,或比椎间盘隙高度的半值要高。
当支撑板34固定在椎体上时,支撑板34可以具有如图3a和4a所示那样的角形或楔形,或者,它可以具有能有效地将修补性植入元件32保持在所需位置的其它形状。例如,在图3a和4a所示的实施方案中,支撑板34包括用于安装到终板20上的安装面42、在与安装面42大致垂直的方向上延伸的保持面44,该保持面跨越终板18和20之间的头-尾距离(cephalad-caudal distance)46中的至少一部分。安装面42还可包括孔48,该孔的大小与紧固件36匹配。支撑板34(尤其是安装面42)可具有表面组织结构如锯齿形、短粗刺形或脊形,以便能更好地固定在毗邻骨上。
紧固件36可以是螺钉、锁紧螺钉、销针、卡钉或能将支撑板34固定在位置上的其它紧固装置。紧固件36可根据需要深入延伸到毗邻椎体内以便牢固地固定支撑板34。紧固件可以放置成相对于脊椎骨终板呈一定角度(倾斜)。在一些实施方案中,紧固件36可涂布有羟基磷灰石(hydroxyapetite),以改善在周围骨上的固定。
支撑板34可以用刚性生物相容性材料制成,该材料例如是金属、陶瓷、聚合物、复合材料、组织或其它材料。例如,合适的金属可包括钛、钛合金、镍钛合金、不锈钢、或钴铬合金。合适的聚合物可包括聚芳基醚酮、聚醚醚酮、聚砜、聚烯烃、聚乙烯、酪氨酸基聚碳酸酯、聚酯、聚交酯、聚乙醇酸交酯(polyglicolide)、聚原酸酯、聚膦腈、聚羟基丁酸酯或聚羟基戊酸酯。合适的复合材料包括充碳的复合材料、填充羟基磷灰石的复合材料、填充生物活性玻璃的复合材料以及填充皮质-骨-碎屑(cortical-bone-chip)的复合材料。合适的组织可包括骨皮质、多孔骨皮质以及骨-韧带结构。在一些实施方案中,支撑板34的与骨接触的表面可涂覆有羟基磷灰石以加强固定。
环面塞40可用非刚性的材料制成,其与环缺陷38大致吻合,其可与支撑板34相连或毗邻以便促进最初的盘力学。环面塞40和支撑板34的结合使用可有效地密封环缺陷38,通过防止或限制假体核32和支撑板34之间直接接触,其可减少假体核32的磨损。另外,环面塞40可加速环缺陷38的愈合。环面塞40可通过挤压、机械紧固件、粘合剂或其它合适的方式来固定到位。在一些实施方案中,可将环面塞40模铸到支撑板34上,或通过燕尾接合与支撑板34相连。
环面塞40可用弹性或其它有弹力的材料制成。合适材料的例子包括:水凝胶、硅酮、聚氨酯、聚异丁烯和聚异戊二烯等聚烯烃、硅酮和聚氨酯的共聚物、氯丁橡胶、腈类、硫化橡胶、和/或其它本领域已知的生物相容性弹性体材料。用各种合成的或天然的材料制成的织物或多孔支架(scaffold)材料也可用来制成环面塞40。这些材料可以是再吸收性或非再吸收性的,其可包括,例如,聚乙烯、聚酯、聚乙烯醇、聚丙烯腈、聚酰胺、聚四氟乙烯、聚对苯二酰对苯二胺、纤维素、丝绸、弹性蛋白、聚交酯、聚乙醇酸交酯、酪氨酸基聚碳酸酯、聚酐、聚原酸酯、聚膦腈、聚羟基丁酸酯和/或聚羟基戊酸酯。天然的组织也适合用来形成环面塞40。例如,可采用环、韧带、腱、或其它结缔组织的自体移植物、同种异体移植物或异种移植物。
本发明还考虑了上述植入物系统的各种变化方案。可以获得各种大小的支撑板,从而为外科医师在修复环缺陷时提供灵活度。在一变化的实施方案中,安装面和保持面之间的角度可以不是直角。在变化的实施方案中,支撑板可包括其它安装面和保持面,其可与椎体终板18和20两者相连。
在一个变化方案中,可以省略环面塞。在这种情况下,保持面可以是光滑的或抛光的,从而最大程度地减少对假体核的损伤。在省略环面塞时,可对保持面进行衬垫或涂覆,以便减少支撑板和假体核之间的磨损。衬垫或涂层可以是柔性的,以便提供缓冲;或者可以是较为刚性的,以便提供耐磨性。在一个例子中,可采用UHMWPE衬里。UHMWPE衬里的厚度例如可在100微米至5毫米之间。
美国专利6,733,531和美国专利申请10/419,364、10,123,367和10/399,308中描述了相关的保持系统,这些内容纳入本文作为参考。
现在参看图3b和4b。在另一实施方案中,植入物系统50与植入物系统30及其组件基本上相似,只是有下述的不同之处。植入物系统50可包括假体核52,用于替代所有或部分的天然核质22和/或纤维环24的内层。核质52可占据天然核质22和纤维环24内层所空出的几乎全部区域。植入物系统50还可包括一个或多个保持装置,如支撑板54,它通过紧固件56与毗邻的椎体16相连并被放置成防止假体核52通过环缺陷排出或迁移。另外,植入物系统50还任选地省略环面塞。
现在参看图3c、3d、3e、3f、3g、3h和3i,支撑板可制成各种不同的尺寸和形状以便与各种不同的环缺陷相适应。下述的支撑板与支撑板34基本上相似,只是在下述特征上不同。例如,图3c显示了位于背部的支撑板60,其在毗邻环的两侧以及假体核52之间伸展。图3d显示了支撑板62,其在毗邻环一侧以及假体核52之间伸展。图3e显示了伸长的支撑板64,其用两个紧固件66连接在终板20上,这两个紧固件与紧固件36基本相似。该伸长的支撑板64可以和后方的盘隙一样宽,例如在2-30毫米之间。图3f显示了一对支撑板68,它们置于后方的两侧。图3g显示了一对支撑板70,它们置于后方的两侧,并在剩余的环和假体核52之间伸展并逐渐变细。图3h显示了一对支撑板72、74,它们被制成相互重叠的构型以防止假体核52排出。图3i显示了一对支撑板76、78,它们被制成相互重叠的构型以防止假体核52排出,而且它们还被制成在剩余的环和假体核52之间伸展的构型。
现在参看图5。可用增强装置150来安装或取出支撑板34。增强装置150可包括一装置外壳152,该外壳具有穿孔54,通过该穿孔可将驱动器156插入。装置外壳152可包括具有远端开口160的远端(部)158,所述驱动器156可通过该远端开口伸出。远端158和穿孔154的对应部分可以成一定角度(倾斜)或是弯曲的。
驱动器156可包括柄部162,该柄部与具有柔性轴部分166和接合端部168的轴164相连。接合端部168可包括,例如,多用途驱动工具、钻尖或螺丝刀尖。接合端部168可以和轴164形成一整体,或可与轴164分开。可用一系列的驱动器来完成整个步骤。
通过穿孔154将驱动器156插入后,接合端部168将从远端开口160中伸出。柔性的轴部分166在通过呈一定角度倾斜的远端部158时可弯曲。增强装置150还可包括致动器系统170,它能选择性地开启以引起柔性轴部分166进一步弯曲。可采用连接机构172来选择性地将支撑板34连接到增强装置150上和与增强装置150脱离。连接机构172可包括机械、磁力学或本领域已知的其它连接方式。在一个实施方案中,连接机构可包括金属丝(wire)钩,其可与支撑板34任一侧上的小孔连接和脱离。
现在描述一种用于增大或重建椎间盘的方法,该方法是将一装置(如支撑板34)安装到脊椎骨终板20上。可用前方、前外侧、侧面、后面或其组合方法来进行椎间盘切除和/或核切除手术。该步骤会导致环缺陷38。虽然显示的是在后侧的位置,但是应理解环缺陷可以位于前侧或椎间盘隙的其它处。因此,支撑板34可以位于环缺陷前方、后方、侧面或其它位置。假体核32可通过环缺陷38插入并置于椎体14、16之间。在一些实施方案中,可将环面塞40插入到环缺陷38的位置上,以促进密封,并为假体核32和支撑板34之间的界面提供缓冲。在一些实施方案中,可以除去支撑板34处的脊椎骨终板20的软骨层,以便在终板20和支撑板34之间有更好地骨接触和结合。
现在参看图6-10,可安装支撑板34来促进环缺陷38的愈合,同时将假体核32保持在椎体14和16之间的所需位置上。如图6所示,可将支撑板34载于增强装置150的远端部158上,并用连接机构172固定就位。如图7所示,可通过增强装置150的穿孔154将驱动器156插入,该驱动器可以是具有钻尖182和柔性轴部分184的钻子180。钻尖182可从远端开口160中伸出。
如图8所示,远端部158的倾斜一定角度的形状与致动器系统170(在本实施方案中包括可滑动的支承件186)的组合可使钻尖182在柔性轴部分184处弯曲。具体地说,通过按下扳机170,向柔性轴部分184施加力并使其弯曲,可将可滑动的支承件184向前推。弯曲使得钻尖182以最小的位移和对周围组织的损伤进入狭窄的空隙内(如椎体14和16之间的椎间盘隙内)。钻尖182将穿透支撑板34中预先存在的孔48,然后可开启钻子,在脊椎骨终板20内钻出成一定角度的孔188(图9)。在另一实施方案中,当孔不在支撑板的安装面内时,钻尖将钻孔通过支撑板的安装面并进入脊椎骨终板20。
现在参看图9-10。在形成孔188后,可取出钻子180,替换成驱动器156(它可以是具有推进端192和柔性轴部分194的螺丝刀190)。将紧固件36(可以是螺钉)与推进端192相连。然后,紧固件36和螺丝刀190通过增强装置150的穿孔154插入,结果使紧固件36通过远端开口160伸出。开启螺丝刀190,将紧固件36推入有一定角度的孔188内。随着螺钉36与有一定角度的孔188啮合,支撑板34固定到脊椎骨终板20上。支撑板34可放置成使保持面44阻塞环缺陷38。包括安装面42和保持面44的被固定的支撑板34可完全置于脊椎骨终板18和20之间,同时使保持面44在大致的头-尾方向上突出。将支撑板34固定在椎间空隙内可以减少与外部紧固作用相关的软组织损伤和干扰。在支撑板34被固定后,连接机构172可以脱离,从而使支撑板34与增强装置150分开。如果需要进行改动,也可用增强装置150来除去支撑板34。
可用另一种类型的紧固件如钉子或卡钉作为螺钉的变化方案。在一变化的实施方案中,可在支撑板34不与增强装置150连接的情况下进行钻孔。在该方案中,支撑板34可在钻出孔184后导入紧固件36时再连接。应理解,上述的增强装置和使用方法也可用来安装不同尺寸、形状和构型的支撑板,其中包括图3b、3c、3d、3e、3f、3g、3h、3i和3j中描述的那些支撑板。虽然增强装置150非常适合安装支撑板34,但外科医师所熟悉和方便使用的其它各种装置也可用来将支撑板34固定到脊椎骨终板20上。
现在参看图11。在一变化的实施方案中,增强装置200与增强装置150基本上相似,只是在下述特征上不同。增强装置200可包括具有远端开口204的远端202,驱动器206可通过该远端开口伸出。增强装置200还可包括从远端202伸出的稳定器208和210,它们分别与椎体14和16啮合。
在安装支撑板34的步骤中,将增强装置200的远端202置于椎体14和16之间,将稳定器208推进至与椎体14啮合。稳定器208可以选择性地伸展。例如,在最初放置增强装置200时,稳定器208可以在装置内处于缩进位置。在将装置200放到所需位置上后,就可选择性地伸长稳定器208并锁定,从而将装置200固定在所需位置上。配备的稳定器208可防止远端202在随后的穿孔以及支撑板安装过程中移位。稳定器208还可在更换驱动器的时候保持远端202的精确定位。在该实施方案中,稳定器208可以是滑销,但是其它具有稳定作用的结构如螺钉、固定器(stable)或夹钳也是可接受的变化方案。稳定器208可以沿装置200所确定的轴伸入椎体14(如图11所示)。然而,在变化方案中,稳定器可呈一定角度配置。应理解,稳定器210可以用与稳定器208一样或相似的方式来起动,因此这里不再分别作详细的描述。稳定器210还可与稳定器208一起使用或独立于稳定器208使用。
尽管上文仅仅详细描述了本发明的几个示例性的实施方案,但本领域技术人员很容易理解,在实质上不脱离本发明的新的教导和优点的情况下还可对这些示例性的实施方案作许多变化。因此,所有这些变化均包括在以下权利要求所确定的本发明范围内。在该权利要求中,用“方式加功能”的限定意为覆盖了本文所述的执行所述功能的结构,以及其结构等同物和等同结构。

Claims (49)

1.一种防止置于一对脊椎骨终板之间的核假体迁移的系统,该系统包括:
第一支撑板,它具有安装面和保持面,其中所述安装面与所述保持面大致垂直;和
通过安装面插入且仅插入脊椎骨终板之一的紧固件,
其中所述第一支撑板完全位于所述一对脊椎骨终板之间。
2.如权利要求1所述的系统,其中所述第一支撑板具有楔形。
3.如权利要求1所述的系统,其中所述保持面的长度比脊椎骨终板之间的距离的半值大。
4.如权利要求1所述的系统,其中所述安装面包括粗糙的表面组织结构。
5.如权利要求1所述的系统,其中所述保持面是光滑的。
6.如权利要求1所述的系统,其中所述安装面至少部分涂覆了羟基磷灰石。
7.如权利要求1所述的系统,其中所述紧固件是螺钉。
8.如权利要求1所述的系统,其中所述紧固件至少部分涂覆了羟基磷灰石。
9.如权利要求1所述的系统,其中所述第一支撑板包含钛。
10.如权利要求1所述的系统,其中所述第一支撑板包含聚醚醚酮。
11.如权利要求1所述的系统,所述系统还包括环面塞。
12.如权利要求1所述的系统,其中所述保持面上衬有超高分子量聚乙烯。
13.如权利要求1所述的系统,其中所述第一支撑板包括适合在环壁和核假体之间伸展的逐渐变细的部分。
14.如权利要求1所述的系统,所述系统还包括用于防止核假体迁移的第二支撑板。
15.如权利要求14所述的系统,其中所述第一支撑板与所述第二支撑板重叠。
16.一种用于修复环缺陷区域以防止核假体迁移的组装件,该系统包括:
用于阻挡椎间植入物迁移通过环缺陷区域的第一阻挡板,所述第一阻挡板位于一对脊椎骨终板所确定的椎间盘隙内;和
用于将所述第一阻挡板与单个脊椎骨终板相连的有螺纹的连接件。
17.如权利要求16所述的组装件,其中所述第一阻挡板占据了所述环缺陷区域的一半以上。
18.如权利要求16所述的组装件,其中所述第一阻挡板的一部分包括与核假体成界面接触的耐磨表面。
19.如权利要求16所述的组装件,其中所述第一阻挡板的一部分包括与核假体成界面接触的缓冲表面。
20.一种用于将保持装置连接到脊椎骨终板上的增强装置,该增强装置包括:
具有远端部分的驱动器外壳;
延伸通过所述驱动器外壳的驱动机构,该驱动机构包括柔性轴部分;和
在所述驱动器外壳远端部分的连接机构,
其中所述连接机构适合与所述保持装置相连接。
21.如权利要求20所述的增强装置,其中所述驱动机构还包括钻尖。
22.如权利要求20所述的增强装置,其中所述驱动机构还包括螺丝刀尖。
23.如权利要求20所述的增强装置,它还包括使所述驱动机构在柔性轴部分弯曲的弯曲致动器。
24.如权利要求20所述的增强装置,其中所述连接机构包括将所述保持装置从增强装置中脱离出来的选择器。
25.如权利要求20所述的增强装置,其中所述远端部分成一定角度,以使驱动机构在柔性轴部分处弯曲。
26.如权利要求20所述的增强装置,它还包括从远端部分伸出的稳定器。
27.一种将假体材料保留在椎间盘隙内的方法,该方法包括:
将保持装置与增强装置相连;
使第一柔性驱动轴弯曲,以在脊椎骨终板内钻出孔;
将紧固件通过所述保持装置插入;
将第二柔性驱动轴弯曲,以将所述紧固件推入孔内;和
使保持装置与增强装置脱离。
28.如权利要求27所述的方法,该方法还包括:
将增强装置的远端部分插入椎间盘隙内。
29.如权利要求27所述的方法,该方法还包括:
通过增强装置内的穿孔将第一柔性驱动轴插入。
30.如权利要求27所述的方法,该方法还包括:
用致动器来使第一柔性驱动轴弯曲。
31.如权利要求27所述的方法,该方法还包括:
安装环面塞使其与保持装置毗邻。
32.如权利要求27所述的方法,其中所述第一柔性驱动轴为所述第二柔性驱动轴。
33.如权利要求27所述的方法,该方法还包括:
使用稳定器来与椎体啮合。
34.一种防止假体材料从椎间盘隙内迁移出来的方法,该方法包括:
提供保持装置,该保持装置具有与安装面大致垂直的阻挡面,
将所述阻挡面置于椎间盘隙内,以防止假体材料迁移;和
将安装面固定在脊椎骨终板上,其中所述保持装置全部在椎间盘隙内。
35.如权利要求34所述的方法,该方法还包括:
将环面塞置于阻挡面和假体材料之间。
36.如权利要求34所述的方法,该方法还包括:
在脊椎骨终板内钻出孔。
37.如权利要求34所述的方法,其中在脊椎骨终板内钻出孔的步骤包括使钻杆轴弯曲,以在脊椎骨终板内钻出孔。
38.如权利要求34所述的方法,其中将保持装置固定到脊椎骨终板的步骤包括将紧固件通过保持装置推入脊椎骨终板内。
39.如权利要求34所述的方法,该方法还包括:
使用可选择性伸展的稳定器来与椎体啮合。
40.一种防止椎间植入物迁移通过环缺陷的系统,该系统包括:
用于阻挡椎间植入物迁移通过环缺陷的第一支撑板;
用于将所述第一支撑板与脊椎骨终板相连的紧固件;和
增强装置,它包括可弯曲的驱动轴,其中所述可弯曲的驱动轴适合将紧固件推进通过第一支撑板并进入脊椎骨终板。
41.如权利要求40所述的系统,该系统还包括:
用于阻塞环缺陷的可变形的环面塞。
42.如权利要求40所述的系统,其中所述第一支撑板包括用于阻塞环缺陷的阻挡面,以及其中有紧固件通过的安装面。
43.如权利要求40所述的系统,其中所述阻挡面与所述安装面大致垂直。
44.如权利要求40所述的系统,其中所述紧固件至少部分涂覆了羟基磷灰石。
45.如权利要求44所述的系统,其中所述安装面包括粗糙的表面组织结构。
46.如权利要求44所述的系统,其中所述安装面至少部分涂覆了羟基磷灰石。
47.如权利要求40所述的系统,其中所述第一支撑板包括适合在环壁和椎间植入物之间伸展的逐渐变细的部分。
48.如权利要求40所述的系统,该系统还包括用于阻挡椎间植入物迁移通过环缺陷的第二支撑板。
49.如权利要求48所述的系统,其中所述第一支撑板与所述第二支撑板重叠。
CNA2005800353731A 2004-10-14 2005-10-14 增强或重建椎间盘的植入系统、方法和装置 Pending CN101048116A (zh)

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