CN102143722A - 可调节椎间植入件 - Google Patents

可调节椎间植入件 Download PDF

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Publication number
CN102143722A
CN102143722A CN2008801309551A CN200880130955A CN102143722A CN 102143722 A CN102143722 A CN 102143722A CN 2008801309551 A CN2008801309551 A CN 2008801309551A CN 200880130955 A CN200880130955 A CN 200880130955A CN 102143722 A CN102143722 A CN 102143722A
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CN
China
Prior art keywords
external component
internal part
scalable
intervertebral implant
expansion loop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2008801309551A
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CN102143722B (zh
Inventor
W·N·伍德伯恩
T·佩佩
W·麦克多诺
D·S·凯普哈特
D·E·伊文斯
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AO Technology AG
Synthes USA LLC
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Synthes AG Chur
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    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
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Abstract

本发明公开了一种可调节椎间植入件(100),用于植入病人的脊椎中并在第一和第二相邻或邻近的椎骨之间。该植入件包括一个或多个以下特征:(i)内部部件(110)和外部部件(115)通过可射线成像的膨胀环(130)来连接;(ii)可拆卸端板(120、125),该端板通过多边形压配合连接交界面而与植入件连接,该连接交界面适应一定范围的脊柱前凸端板,以便利用外科手术接近来施加在植入件上;(iii)干涉的预装载定位螺钉(160),用于选择地锁定结构的高度;(iv)可射线成像的标记(180),用于确定植入件的膨胀;以及(v)在膨胀环和内部部件之间的不对称螺纹连接(133、190)。

Description

可调节椎间植入件
技术领域
本发明涉及一种椎间植入件,更特别是涉及一种可调节高度的椎间植入件,它优选是使得用户能够调节植入件的高度。
背景技术
退化椎间盘疾病或椎骨本体的退化通常导致椎间盘高度损失,这又可能特别引起面和神经碰撞。一种标准治疗是用椎间植入件替换受损的椎间盘,或者用椎间植入件替换受损的部分或整个椎骨本体。也就是,在除去受损的椎间盘、椎间盘的受损髓核或者受损的部分或整个椎骨本体之后,椎间盘植入件插入两个相邻椎骨本体的椎间空间中,或者插入通过除去部分或整个椎骨本体而产生的空间中。优选是,椎间植入件使得脊椎尽可能地恢复至自然状态,即恢复椎间盘的初始高度,并因此恢复在两个相邻或邻近的椎骨本体之间或者在脊椎的不同高度的椎骨本体之间的初始距离。
发明内容
本发明涉及用于插入第一和第二椎骨本体之间的可调节椎间植入件。植入件可以包括第一部件、第二部件和膨胀环,该膨胀环与第一和第二部件操作相连,该环包括一个或多个螺纹,用于与形成于第一部件的外表面上的一个或多个螺纹接合,这样,环的旋转使得第一部件相对于第二部件轴向运动或平移。第一部件可以稍微小于第二部件,这样,第一部件至少局部接收于第二部件内。
附图说明
当结合附图阅读时将更好地理解前面的发明内容以及后面对本申请的可调节椎间植入件或装置的优选实施例的详细说明。为了示例说明本申请的椎体切割术植入件,附图中表示了植入件和用于植入它的工具的优选实施例。不过应当知道,本申请并不局限于所示的确切结构和仪器。在附图中:
图1表示了本发明优选实施例的可调节椎间植入件的正视透视图;
图2表示了图1的可调节椎间植入件的局部分解正视透视图;
图3表示了图1的可调节椎间植入件的放大局部分解正视透视图;
图4表示了图1的可调节椎间植入件沿图1的线4-4的剖视图;
图5表示了图1的可调节椎间植入件沿图2的线5-5的剖视图;
图6A表示了图1的可调节椎间植入件的内部部件的俯视透视图;
图6B表示了图6A的内部部件的后视图;
图6C表示了图6A的内部部件沿图6B的线6C-6C的剖视图;
图6D表示了图6A的内部部件沿图6B的线6D-6D的剖视图;
图7A表示了图1的可调节椎间植入件的外部部件的俯视透视图;
图7B表示了图7A的外部部件的侧视图;
图7C表示了图7A的外部部件沿图7A的线7C-7C的剖视图;
图8A表示了图1的可调节椎间植入件的膨胀环部件的仰视平面图;
图8B表示了图8A的膨胀环部件的侧视图;
图8C表示了图8A的膨胀环部件沿图8A的线8C-8C的剖视图;
图9表示了图1的可调节椎间植入件的螺钉部件的侧视图;
图10表示了图1的可调节椎间植入件的侧视图;
图11表示了图1的可调节椎间植入件的仰视透视图,该可调节椎间植入件与根据本发明优选实施例的插入仪器连接;
图12表示了与图11的插入仪器连接的、图1的可调节椎间植入件的侧视透视图;
图13表示了图11的插入仪器的抓紧端的放大俯视透视图;以及
图14表示了图11的插入仪器沿图13的线14-14的局部剖视图,并表示了插入仪器的齿轮的细节。
具体实施方式
下面的说明书中使用的某些术语只是为了方便,而不是限定。词语“左”、“右”、“下部”和“上部”表示在所参考的图中的方向。词语“向内”或“向外”是指分别朝向和远离可调节椎间植入件、插入工具和它们的指定部件的几何中心的方向。词语“前面”、“后面”、“上面”、“下面”以及相关词和/或短语表示在所参考的人体中的优选位置和方位,而不是进行限制。术语包括上面所述的词语、它的衍生词和类似意思的词。
下面将参考附图介绍示例实施例。通常,这些实施例涉及椎间植入件,非限定实例是用于植入病人的脊椎中在第一和第二相邻或邻近椎骨之间的可调节椎间植入件。当用作椎体切割术装置时,椎间植入件能够执行单高度或多高度操作,即除去一个或多个椎骨和/或椎骨部分。可调节椎间植入件还在PCT国际申请No.PCT/US08/56898中进一步介绍,该PCT国际申请No.PCT/US08/56898的申请日为2008年3月13日,标题为ADJUSTABLE INTERVERTEBRAL IMPLANT,该文献的整个内容通过参引而加入本文。
椎间植入件可以有这里所述的可选用途和使用,且并不局限于这里所述和所示的结构或使用。也就是,尽管椎间植入件将介绍为和可以大致用于脊椎中(例如在腰部、胸部或颈部区域),本领域技术人员应当知道,椎间植入件也可以用于身体的其它部分,并可以有医疗装置领域之外的其它用途。
参考图1-8C,可调节椎间植入件100的优选实施例设置成用于替换患病或受损椎骨本体的至少一部分。可调节椎间植入件100包括:第一本体部件,该第一本体部件优选是包括具有大致管形结构的内部部件110;第二本体部件,该第二本体部件优选是包括具有大致管形结构的外部部件115;以及膨胀环130,它们中的每一个均为空心的,以便提供在可调节椎间植入件100内部和沿该可调节椎间植入件的纵向轴线101的轴向孔。也就是,在使用时,第一或内部部件110优选是尺寸和形状设置成稍微小于第二或外部部件115,这样,第一部件110可运动地布置在第二部件115内。因此,第一部件110的总体特征是作为内部部件110,而第二部件115的总体特征是作为外部部件115。不过应当知道,可以考虑使得第一部件110和第二部件115活动相连的其它结构。
最好如图7A-7C中所示,外部部件115优选是基本空心、管形的部件,具有第一端202、第二端204、外表面206和内部孔208,该内部孔208基本从第一端202延伸至第二端204。外部部件115优选是包括一个或多个相对较大的骨填塞开口210,该骨填塞开口210形成于外部部件115的外表面206中,用于提供通向内部孔208的进口,这样,外科医生能够将骨片或可选的移植材料插入植入件100中,原因为本领域普通技术人员已知的。外部部件115还优选是包括若干更小的开口212,用于在植入结构中允许骨在内生长,以便促进相邻椎骨50的融合,可调节椎间植入件100在植入位置安装在该相邻椎骨50之间。椎间植入件100并不局限于包括骨填塞开口210或更小开口212,且其中可以并不包括开口210、212,或者根据植入件100的特定用途或结构,可以包括附加可变形状的开口。
最好如图6A-6D中所示,内部部件110优选是基本空心的管形部件,具有第一端182、第二端184、外表面186和空心内部空腔188。内部部件110的外表面186优选是包括在它上面形成的螺纹190。如图所示,内部部件110的外表面186优选是并不围绕360度(360°),这样,内部部件110优选是成局部管形部件的形式。因此,内部部件110优选是包括狭槽192,该狭槽192从它的第二端184延伸,原因将在后面介绍。不过应当知道,内部和外部部件110、115并不局限于管形,而是可以有可选形状,例如正方形、椭圆形或允许在内部和外部部件110、115之间平移的几乎任意其它形状。
参考图6A-8C,膨胀环130包括内部孔132,内部部件110接收于该内部孔132中。膨胀环130也优选是与外部部件115可运动地连接,更优选是可旋转地安装。膨胀环130可以通过使得该膨胀环130能够与外部部件115可运动地连接(优选是可旋转地安装)的任意装置而与外部部件115连接,该装置包括但不局限于:搭扣配合连接件、压配合连接件、销和槽结构等。优选是,膨胀环130和外部部件115的内径和外径类似,这样,膨胀环130搁置在外部部件115的顶部,并通过凸片216而相对于该外部部件115进行保持。凸片216从外部部件115向上延伸,这样,膨胀环130可在凸片216的底部和外部部件115的顶部上滑动,并由该凸片216的底部和外部部件115的顶部来引导它的滑动。膨胀环130能够在释放位置相对于外部部件115自由地旋转。内部部件110优选是布置在外部部件115的内部,并通过平行于纵向轴线101延伸的狭槽192而相对于外部部件对齐。狭槽192设置成与凸片216匹配。
膨胀环130的内周包括螺纹133,该螺纹133设置成与形成于内部部件110的外表面186上的螺纹190匹配,这样,膨胀环130的旋转使得内部部件110相对于外部部件115沿可调节椎间植入件100的纵向轴线101而平移或大致线性运动。也就是,在使用中,内部和外部部件110、115优选是沿公共纵向轴线101同轴布置,并优选是可彼此相对滑动地布置(例如可伸缩),这样,内部部件110的轴向位置可相对于外部部件115进行调节。膨胀环130的旋转驱动在内部和外部部件110、115之间的伸缩连接件,这样,膨胀环130的旋转根据该旋转的相对方向而使得内部和外部部件110、115膨胀或收缩。
膨胀环130优选是还包括一系列齿134,这些齿134环绕膨胀环的外表面周向布置,用于与相应工具接合,这样,工具(该工具可以是手动操作或者电动)的旋转使得膨胀环130旋转。这样,该系列齿134有助于膨胀环130的旋转。优选是,该系列齿134的尺寸和形状设置成与插入仪器300接合,该插入仪器300将在下面更详细地介绍。当齿134由仪器300驱动时,膨胀环130旋转,从而导致内部和外部部件110、115彼此相对运动。也可选择和/或另外,膨胀环130可以在并不借助于齿134和插入仪器300的情况下手动旋转,或者通过目前或以后知道的任意其它装置来旋转。
椎间植入件100可以由本领域已知的任意可生物相容的材料或任意可生物相容材料的组合来构成,包括但不局限于:不锈钢、钛、钛合金、陶瓷、聚合物(包括但不局限于聚四氟乙烯“PTFE”)等。优选是,内部和外部管形部件110、115由射线可透过的材料形成,例如聚合物或聚醚醚酮(“PEEK”),而膨胀环130优选是由金属形成,例如钛或不锈钢。在优选是金属膨胀环130的内表面和优选是聚合物或其它射线可透过材料的内部部件110的外表面之间的螺纹接合的特征在于螺纹具有不对称几何形状,如图4中所示。也就是,因为形成于膨胀环130上的螺纹133优选是由金属制造,因此它们通常比形成于内部部件110的外表面186上的螺纹190更坚固(该内部部件110优选是由聚合物材料制造)。因此,形成于膨胀环130的内表面上的螺纹133可以制成为比形成于内部部件110的外表面186上的螺纹190更细。优选是,形成于膨胀环130上的金属螺纹133设置成使得金属螺纹133的强度基本与形成于内部部件115的外表面186上的更厚聚合物螺纹190的强度类似。更具体地说,优选是,形成于金属膨胀环130的内表面上的螺纹脊133a的宽度We比形成于聚合物内部部件110的外表面上的螺纹脊190a的宽度Wi更小。更厚聚合物螺纹190与更细金属螺纹133的配合提供了这样的结构,其中,当与在非典型材料之间的标准对称螺纹形式相比时,在更短的螺纹接合跨距上产生更大的螺纹负载,在标准对称螺纹形式中,更强材料的螺纹与更弱材料的螺纹一样厚,并导致提供相同承载能力所需的螺纹接触面积增加。
最好如图1-3中所示,内部部件110可以包括上部端板120,该上部端板120优选是与内部部件110的第一端182可拆卸地连接。类似的,在优选实施例中,下部端板125与外部部件115的第二端204可拆卸地连接。上部和下部端板120、125的尺寸和形状设置成与相邻椎骨50的相邻椎骨端板接触,且优选是提供于表面几何形状的范围内,以便适应由相邻椎骨50的端板显示的脊柱前凸或脊柱后凸角度的范围。
端板120、125可以通过本领域已知的任意装置而与内部和外部部件110、115连接,包括但不局限于干涉配合、螺纹连接、螺钉连接、粘接等。这样,椎间植入件100可以提供成具有多个不同端板120、125的一套工具,从而使得用户能够选择与病人的椎骨端板的轮廓最相符的合适端板120、125。例如,可以提供各种端板120、125,这些端板120、125包括不同形状,这些不同形状包括但不局限于:圆形、正方形、矩形、卵形、肾形等,和/或一个或多个以下特征:大致楔形表面、弯曲表面、平表面等。也可选择,上部和下部端板120、125可以与内部和外部部件110、115形成一体。
优选是,上部和下部端板120、125首先通过压配合连接而与内部和外部部件110、115连接,最好如图2中所示。该压配合连接优选是呈现多边形交界面的形式,表示为八边形交界面,尽管可以考虑一定范围的允许几何形状,这样,由上部和下部端板120、125选定的合适脊柱前凸/向前弯曲锥体可以快速和可拆卸地与可调节椎间植入件100连接,而不管外科手术接近方法如何(例如侧部、后侧部、前部、后部等)。例如,八边形连接交界面使得选定的上部和下部端板120、125能够相对于纵向轴线101以45度(45°)的增量与可调节椎间植入件100连接,这样,允许以任意合适方法接近脊椎。一旦选择了上部和下部端板120、125的合适脊柱前凸角度,端板120、125压配合安装在内部和外部部件110、115上,且端板120、125利用可选的端板帽150、155而固定在内部和外部部件110、115上,该端板帽150、155优选是与分别在内部和外部部件110、115内部的匹配螺纹151、156进行螺纹接合。
在优选实施例中,上部和下部端板120、125的表面包括防移出特征127,例如齿、尖头、脊或其它表面纹理。
参考图4、5和8A-9,优选是,一个或多个预装载定位螺钉160提供为选择地锁定可调节椎间植入件100的高度。各定位螺钉160优选是包括螺纹杆162和头部164,该头部164的直径大于螺纹杆162的直径。在优选实施例中,多个(优选是5个)定位螺钉160a-160e布置在环绕膨胀环130的外表面递增地间隔开的穿过狭槽170a-170e中。最好如图8A中所示,穿过狭槽170的特征在于具有:近侧部分172,用于容纳定位螺钉160的头部164;以及远侧部分174,用于容纳定位螺钉160的杆162。近侧部分172的直径优选是大于远侧部分174的直径。穿过狭槽170的近侧部分172的直径优选是稍微小于定位螺钉160的头部164的特征直径。由于穿过狭槽170的几何形状,优选是在定位螺钉160的头部164和穿过狭槽170的近侧部分172之间存在两个接触点,这样,不管定位螺钉160是否已经拧紧,定位螺钉160都保持在穿过狭槽170中。因此,各定位螺钉160的头部164在植入件的装载、振动、运送和处理过程中阻止定位螺钉160旋转和平移,或者阻止并不是由合适仪器(例如螺丝刀)引入的其它动力源,从而使得定位螺钉160能够预装载地装入膨胀环130中。
在优选实施例中,可调节椎间植入件100提供有多个定位螺钉160,这些定位螺钉160预装载或已经固定在多个穿过狭槽170内一定深度,该深度足够使得膨胀环130能够自由旋转和提供合适的结构高度,同时仍然保证定位螺钉160固定连接在穿过狭槽170中(由于它们之间的干涉)。任意一个定位螺钉160通过合适仪器进行的前进都使得旋转前进的定位螺钉160的远端165抵靠在内部部件110的外表面186上,并防止膨胀环130进一步旋转,从而锁定可调节椎间植入件100的高度。优选是,在使用中,外科医生只需要使得任意一个方便接近的定位螺钉160前进,以便锁定膨胀环130的位置和因此锁定可调节椎间植入件100的高度。由在定位螺钉160的头部164和穿过狭槽170的近侧部分172之间的干涉提供的、预装载定位螺钉160与膨胀环130的牢固连接使得定位螺钉160能够预先装配至膨胀环130中和牢固保持在其中,从而消除了在外科手术过程中将一个或多个定位螺钉160插入合适的穿过狭槽170内的额外步骤,并避免了相对较小定位螺钉160的可能丢失。
尽管在定位螺钉160的头部164和穿过狭槽170的近侧部分172之间的干涉已经介绍为特征在于它们之间的两点接触,但是可以设想,类似程度的干涉可以通过一定范围的不同干涉几何形状来提供,例如在定位螺钉160的头部164和穿过狭槽170的近侧部分172之间的一个或更多接触点、或者整个或局部表面区域接触。由于在定位螺钉160的头部164和穿过狭槽170的近侧部分172之间的连接强度由它们之间的干涉来提供,因此可以设想其它用途可以从同样在干涉作用下预装载定位螺钉而获益,例如用作在平行植入的脊椎杆之间的“楼梯横档”的横过连接器,其中,定位螺钉包括倾斜远端,该倾斜远端抵靠脊椎杆,并将脊椎杆横向推入横向连接器的杆保持接收部分中,这样,省略了将相对较小定位螺钉插入横向连接器中的额外步骤,且外科手术复杂化(例如细小定位螺钉遗失或跌落)的可能性减小。
参考图1-4,6C、6D和10,可调节椎间植入件100优选是还包括销180。销180优选是布置在形成于内部部件110中并在内部部件110的第二端184附近的孔194内。销180优选是由致密的可射线成像材料例如钛-铝-铌(TAN)而构成。在优选实施例中,最好如图6D和10中所示,销180为大致垂直于内部部件110的纵向轴线101布置的细长柱体,以便平行于膨胀环130的径向轴线,这样,当可调节椎间植入件100植入和通过射线成像来观察时,外科医生可以通过相对于膨胀环130的平行布置的射线成像可视图像来观察销180的纵向轴线而测量已经进行了多大膨胀和可膨胀椎间植入件100还可进行多大膨胀。当可调节椎间植入件100完全膨胀时,销180优选是定位成靠近膨胀环130或者可能由膨胀环130阻挡。
参考图11-14,膨胀和插入仪器300用于可调节椎间植入件100。该膨胀和插入仪器300包括手柄310、轴330和环绕该轴330布置的可平移套筒335。套筒335还包括远侧锥体338。第一操纵机构320和第二操纵机构325沿轴330的近侧部分布置。一对抓取爪350和齿轮340布置在轴330的远端附近。第一操纵机构320的驱动(优选是旋转)使得一个或两个抓取爪350打开和/或关闭,以便使得抓取爪350能够环绕外部部件115或释放外部部件115。在优选实施例中,最好如图13中所示,第一操作结构320的旋转迫使套筒335沿轴330向远侧平移,并使得远侧锥体338与抓取爪350的近侧部分351的内表面352接合,从而使得抓取爪350绕由销提供的枢轴点进行枢轴转动而关闭,该销将抓取爪350固定在膨胀和插入仪器300上。也就是,在使用时,首先,抓取爪350打开,这样,抓取爪350能够环绕外部部件115。然后驱动第一操纵机构320(例如旋转),以便使得套筒335沿轴330向远侧平移,从而使得抓取爪350的近端的内部的匹配表面和套筒335的远侧锥体的匹配表面进行接合,因此使得抓取爪350的内表面牢固抓取外部部件115。
在优选实施例中,外部部件115包括一个或多个仪器接合特征,该仪器接合特征可以成凹入部分或槽的形式,与抓取爪350的远端354的内表面或该内表面上的可选表面特征接合。当可调节椎间植入件100通过抓取爪350而与膨胀和插入仪器300牢固连接时,齿轮340与形成于膨胀环130的外表面上的一系列齿134进行功能性接触。第二操纵机构325的驱动(优选是旋转)使得齿轮340旋转,又使得膨胀环130相对于可调节椎间植入件100旋转,这又根据旋转方向而引起可调节椎间植入件100的伸缩式膨胀或收缩。
在操作时,可调节椎间植入件100可以选择地由外科医生将骨移植材料填充至轴向孔中,以便能够在相邻椎骨50的相邻椎骨端板之间通过可调节椎间植入件100而融合。外科医生选择合适的脊柱前凸锥体来用于上部和下部端板120、125,并使得上部和下部端板120、125分别与内部和外部部件110、115在若干位置中的任意一个进行压配合(根据由它们之间的多边形界面提供的选定外科手术进入通路决定)。然后,外科医生优选是选择利用上部和下部端板帽150、155而将端板120、125固定在可调节椎间植入件100上。可调节椎间植入件100利用抓取爪350通过第一操纵机构320的驱动而与插入和膨胀仪器300接合。可调节椎间植入件100优选是以它的最低高度结构植入相邻椎骨50的相邻椎骨端板之间,并利用第二操纵机构325而使得可调节椎间植入件100就地膨胀,同时考虑到销180的图像和膨胀环130的图像的位置,通过射线成像而使得可调节椎间植入件100的高度膨胀可视化。一旦可调节椎间植入件100达到合适高度,定位螺钉160中的一个利用简单的仪器(例如螺丝刀)而前进,以便锁定可调节椎间植入件100的高度。
尽管前面的说明和附图表示了本发明的优选实施例,但是应当知道,在不脱离如所附权利要求中确定的本发明精神和范围的情况下可以在优选实施例中进行各种附加、改变、组合和/或代替。特别是,本领域技术人员应当知道,本发明可以以其它特殊形式、结构、布置和特性以及其它元件、材料和部件来实施,而并不脱离本发明的精神或基本特征。本领域技术人员应当知道,本发明可以在实施本发明时用于多种变化的结构、布置、比例、材料和部件,这些特别用于特殊环境和外科手术需要,而并不脱离本发明的原理。此外,这里所述的特征可以单独使用或与其它特征组合使用。因此,这里所述的实施例在各种方面都认为是示例的和非限定的,本发明的范围由所附的权利要求来表示,而并不局限于前述说明书。

Claims (16)

1.一种可调节椎间植入件,用于植入相邻椎骨本体之间以便替换全部或较大部分的受损椎骨,该可调节椎间植入件包括:
射线可透过的内部部件,该内部部件有:在第一端和第二端之间延伸的纵向轴线;外表面;穿过狭槽,该穿过狭槽沿纵向轴线从第二端伸出;在外表面上的第一螺纹;以及在第一端处的连接交界面;
射线可透过的外部部件,该外部部件有:在第一端和第二端之间延伸的纵向轴线;内表面;外表面;凸片,该凸片沿纵向轴线从第一端凸出,并终止于唇缘,该唇缘与外部部件的纵向轴线基本垂直地凸出,内部部件可滑动地接收于外部部件中,并可沿纵向轴线滑动,该滑动由从外部部件凸出的凸片与在内部部件中形成的穿过狭槽的相互作用来引导;以及在第二端处的连接交界面;
射线成像可视的膨胀环,该膨胀环有内表面和外表面,内表面上有第二螺纹,其中,第一螺纹的顶部的宽度大于第二螺纹的顶部的宽度,膨胀环环绕接收从外部部件凸出的凸片并在唇缘下面,以便可相对于外部部件自由旋转,膨胀环的驱动导致第一和第二螺纹接合以及内部部件相对于外部部件滑动平移,膨胀环还包括多个无螺纹的穿过狭槽,这些无螺纹的穿过狭槽周向环绕膨胀环布置,该穿过狭槽的特征在于有近侧部分和远侧部分,该近侧部分的特征在于直径大于远侧部分的直径;以及
多个预装载定位螺钉,这些定位螺钉有头部和螺纹杆,定位螺钉的头部通过干涉配合而定位在穿过狭槽的近侧部分中,其中,任意一个定位螺钉在相应穿过狭槽中的前进都使得定位螺钉的远端抵靠内部部件的外表面,从而使得内部部件相对于外部部件固定在锁定位置。
2.根据权利要求1所述的可调节椎间植入件,还包括:
可拆卸的上部和下部端板,该上部和下部端板有连接交界面,用于分别安装在内部部件的第一端和外部部件的第二端的连接交界面上。
3.根据权利要求2所述的可调节椎间植入件,其中:连接交界面包括多边形连接交界面,从而使得端板能够在任意数目的位置处与内部或外部部件连接,该位置的数目等于多边形的边数。
4.根据权利要求2所述的可调节椎间植入件,其中:上部或下部端板中的至少一个包括脊柱前凸或脊柱后凸的锥体。
5.根据权利要求1所述的可调节椎间植入件,还包括:
布置在内部部件中的、可射线成像的标记。
6.根据权利要求5所述的可调节椎间植入件,其中:可射线成像的标记包括安装在内部部件的第二端附近的销。
7.根据权利要求6所述的可调节椎间植入件,其中:销包括销轴线,该销轴线定向成与内部部件的纵向轴线大致垂直。
8.根据权利要求1所述的可调节椎间植入件,其中:多个预装载定位螺钉中的至少一个的远端在锁定位置与内部部件的第一螺纹的平面顶点接合。
9.根据权利要求1所述的可调节椎间植入件,其中:在装载位置,内部部件的第二端定位在外部部件的第二端的附近,内部部件的第一端定位在外部部件的第一端的附近,在完全膨胀位置,内部部件的第二端定位在外部部件的第一端的附近。
10.根据权利要求9所述的可调节椎间植入件,还包括:
可射线成像的销,该销安装在内部部件的第二端的附近。
11.根据权利要求1所述的可调节椎间植入件,其中:该多个预装载定位螺钉包括5个预装载定位螺钉。
12.根据权利要求11所述的可调节椎间植入件,其中:穿过狭槽周向环绕膨胀环均匀间隔开,从而确定了定心在纵向轴线上的穿过狭槽角度,该穿过狭槽角度近似为72°。
13.根据权利要求1所述的可调节椎间植入件,其中:外部部件包括仪器接合特征。
14.根据权利要求1所述的可调节椎间植入件,其中:内部部件的第一端和外部部件的第二端的连接交界面为八边形形状。
15.一种可调节椎间植入件,用于植入相邻椎骨本体之间以便替换全部或较大部分的受损椎骨,该可调节椎间植入件包括:
内部部件,该内部部件有:在第一端和第二端之间延伸的纵向轴线;外表面;穿过狭槽,该穿过狭槽沿纵向轴线从第二端伸出;在外表面上的第一螺纹;
外部部件,该外部部件有:在第一端和第二端之间延伸的纵向轴线;内表面;外表面;凸片,该凸片沿纵向轴线从第一端凸出,并终止于唇缘,该唇缘与外部部件的纵向轴线基本垂直地凸出,内部部件可滑动地接收于外部部件中,并可沿纵向轴线滑动,该滑动由从外部部件凸出的凸片与在内部部件中形成的穿过狭槽的相互作用来引导;
膨胀环,该膨胀环有内表面和外表面,内表面上有第二螺纹,膨胀环环绕接收从外部部件凸出的凸片并在唇缘下面,以便可相对于外部部件自由旋转,膨胀环的转动导致第一和第二螺纹接合以及内部部件相对于外部部件滑动平移,膨胀环还包括多个无螺纹的穿过狭槽,这些无螺纹的穿过狭槽周向环绕膨胀环布置;以及
至少一个定位螺钉,这些定位螺钉有头部和螺纹杆,其中,定位螺钉在相应穿过狭槽中的前进使得该定位螺钉的远端抵靠内部部件的外表面,从而使得内部部件相对于外部部件固定在锁定位置。
16.一种可调节椎间植入件,用于植入相邻椎骨本体之间以便替换全部或较大部分的受损椎骨,该可调节椎间植入件包括:
射线可透过的内部部件,该内部部件有:在第一端和第二端之间延伸的纵向轴线;外表面;穿过狭槽,该穿过狭槽沿纵向轴线从第二端伸出;在外表面上的第一螺纹;
射线可透过的外部部件,该外部部件有:在第一端和第二端之间延伸的纵向轴线;外表面;内部部件可滑动地接收于外部部件中,并可沿纵向轴线滑动;
射线成像可视的膨胀环,该膨胀环有内表面和外表面,内表面上有第二螺纹,其中,第一螺纹的顶部的宽度大于第二螺纹的顶部的宽度,膨胀环可旋转地与外部部件连接,这样,膨胀环的旋转导致第一和第二螺纹接合以及内部部件相对于外部部件滑动平移,膨胀环还包括多个无螺纹的穿过狭槽,这些无螺纹的穿过狭槽周向环绕膨胀环布置;
至少一个定位螺钉,其中,定位螺钉在相应穿过狭槽中的前进使得定位螺钉的远端抵靠内部部件的外表面,从而使得内部部件相对于外部部件固定在锁定位置。
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KR20110060915A (ko) 2011-06-08

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