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公开(公告)号：US08118869B2
公开(公告)日：2012-02-21
申请号：US11371170
申请日：2006-03-08
IPC分类号： A61F2/44
CPC分类号： A61B17/704 , A61B17/7005 , A61B17/701 , A61B17/7011 , A61B17/702 , A61B17/7032 , A61B17/7046 , A61B2017/0256 , A61F2/30767 , A61F2/44 , A61F2002/30001 , A61F2002/30133 , A61F2002/30462 , A61F2002/30492 , A61F2002/30507 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30579 , A61F2002/30649 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/443 , A61F2220/0025 , A61F2220/0075 , A61F2230/0015 , A61F2250/0006 , A61F2250/0009
摘要： A dynamic interbody device for a human spine is provided to stabilize a human spine. In some embodiments, the dynamic interbody device includes a first member and a second member. In some embodiments, dynamic interbody device includes a first member, a second member and a third member. In some embodiments, the dynamic interbody device may include a bridge. The bridge may be used to couple the dynamic interbody device to a posterior stabilization system. In some embodiments, two dynamic interbody devices may be placed in a disc space between vertebrae.
摘要翻译： 提供用于人体脊柱的动态体内装置以稳定人体脊柱。 在一些实施例中，动态体间装置包括第一构件和第二构件。 在一些实施例中，动态体间装置包括第一构件，第二构件和第三构件。 在一些实施例中，动态体间设备可以包括桥接器。 桥可以用于将动态体间装置耦合到后稳定系统。 在一些实施例中，两个动态体间装置可以放置在椎骨之间的椎间盘空间中。
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公开(公告)号：US07794480B2
公开(公告)日：2010-09-14
申请号：US11371182
申请日：2006-03-08
IPC分类号： A61B17/56
CPC分类号： A61B17/7023 , A61B17/1671 , A61B17/1757 , A61B17/7005 , A61B17/7008 , A61B17/7032 , A61B17/7037 , A61B17/704 , A61B17/7041 , A61B17/7052 , A61B17/7064 , A61B17/746 , A61B17/86 , A61B17/8897 , A61B2017/0256 , A61F2/30767 , A61F2/30771 , A61F2/4405 , A61F2/4425 , A61F2/4684 , A61F2002/30133 , A61F2002/30364 , A61F2002/30365 , A61F2002/30369 , A61F2002/30462 , A61F2002/30492 , A61F2002/30507 , A61F2002/30515 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30578 , A61F2002/30579 , A61F2002/30616 , A61F2002/30624 , A61F2002/30649 , A61F2002/30662 , A61F2002/3071 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/443 , A61F2220/0025 , A61F2220/0033 , A61F2220/0075 , A61F2230/0015 , A61F2250/0006 , A61F2250/0007 , A61F2250/0009 , A61F2250/0085 , A61F2310/00407 , A61F2310/00796 , A61F2310/00976
摘要： A stabilization system for a human spine is provided comprising at least one dynamic interbody device and at least one dynamic posterior stabilization system. In some embodiments the stabilization system comprises a pair of dynamic interbody devices and a pair of dynamic posterior stabilization systems. In some embodiments, a bridge may couple a dynamic interbody device to a dynamic posterior stabilization system. In some embodiments, an elongated member of the dynamic posterior stabilization system may be curved.
摘要翻译： 提供了一种用于人体脊柱的稳定系统，其包括至少一个动态体间装置和至少一个动态后稳定系统。 在一些实施例中，稳定系统包括一对动态体间装置和一对动态后稳定系统。 在一些实施例中，桥可以将动态体间设备耦合到动态后稳定系统。 在一些实施例中，动态后稳定系统的细长构件可以是弯曲的。
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公开(公告)号：US08603168B2
公开(公告)日：2013-12-10
申请号：US11371376
申请日：2006-03-08
IPC分类号： A61F2/44
CPC分类号： A61B17/7023 , A61B17/1671 , A61B17/1757 , A61B17/7005 , A61B17/7008 , A61B17/7032 , A61B17/7037 , A61B17/704 , A61B17/7041 , A61B17/7052 , A61B17/7064 , A61B17/746 , A61B17/86 , A61B17/8897 , A61B2017/0256 , A61F2/30767 , A61F2/30771 , A61F2/4405 , A61F2/4425 , A61F2/4684 , A61F2002/30133 , A61F2002/30364 , A61F2002/30365 , A61F2002/30369 , A61F2002/30462 , A61F2002/30492 , A61F2002/30507 , A61F2002/30515 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30578 , A61F2002/30579 , A61F2002/30616 , A61F2002/30624 , A61F2002/30649 , A61F2002/30662 , A61F2002/3071 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/443 , A61F2220/0025 , A61F2220/0033 , A61F2220/0075 , A61F2230/0015 , A61F2250/0006 , A61F2250/0007 , A61F2250/0009 , A61F2250/0085 , A61F2310/00407 , A61F2310/00796 , A61F2310/00976
摘要： A stabilization system for a human spine is provided comprising at least one dynamic interbody device and at least one dynamic posterior stabilization system. In some embodiments the stabilization system comprises a pair of dynamic interbody devices and a pair of dynamic posterior stabilization systems. In some embodiments, a bridge may couple a dynamic interbody device to a dynamic posterior stabilization system.
摘要翻译： 提供了一种用于人体脊柱的稳定系统，其包括至少一个动态体间装置和至少一个动态后稳定系统。 在一些实施例中，稳定系统包括一对动态体间装置和一对动态后稳定系统。 在一些实施例中，桥可以将动态体间设备耦合到动态后稳定系统。
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公开(公告)号：US07785351B2
公开(公告)日：2010-08-31
申请号：US11371190
申请日：2006-03-08
IPC分类号： A61B17/70
CPC分类号： A61B17/7023 , A61B17/1671 , A61B17/1757 , A61B17/7005 , A61B17/7008 , A61B17/7032 , A61B17/7037 , A61B17/704 , A61B17/7041 , A61B17/7052 , A61B17/7064 , A61B17/746 , A61B17/86 , A61B17/8897 , A61B2017/0256 , A61F2/30767 , A61F2/30771 , A61F2/4405 , A61F2/4425 , A61F2/4684 , A61F2002/30133 , A61F2002/30364 , A61F2002/30365 , A61F2002/30369 , A61F2002/30462 , A61F2002/30492 , A61F2002/30507 , A61F2002/30515 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30578 , A61F2002/30579 , A61F2002/30616 , A61F2002/30624 , A61F2002/30649 , A61F2002/30662 , A61F2002/3071 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/443 , A61F2220/0025 , A61F2220/0033 , A61F2220/0075 , A61F2230/0015 , A61F2250/0006 , A61F2250/0007 , A61F2250/0009 , A61F2250/0085 , A61F2310/00407 , A61F2310/00796 , A61F2310/00976
摘要： A stabilization system for a human spine is provided comprising at least one dynamic interbody device and at least two dynamic posterior stabilization systems. The dynamic posterior stabilization system may be coupled on contralateral sides of vertebrae. In some embodiments, a bridge may couple a dynamic interbody device to a dynamic posterior stabilization system.
摘要翻译： 提供了一种用于人体脊柱的稳定系统，其包括至少一个动态体间装置和至少两个动态后稳定系统。 动态后稳定系统可以联接在椎骨的对侧。 在一些实施例中，桥可以将动态体间设备耦合到动态后稳定系统。
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公开(公告)号：US08052723B2
公开(公告)日：2011-11-08
申请号：US11371328
申请日：2006-03-08
IPC分类号： A61B17/70
CPC分类号： A61B17/7023 , A61B17/1671 , A61B17/1757 , A61B17/7005 , A61B17/7008 , A61B17/7032 , A61B17/7037 , A61B17/704 , A61B17/7041 , A61B17/7052 , A61B17/7064 , A61B17/746 , A61B17/86 , A61B17/8897 , A61B2017/0256 , A61F2/30767 , A61F2/30771 , A61F2/4405 , A61F2/4425 , A61F2/4684 , A61F2002/30133 , A61F2002/30364 , A61F2002/30365 , A61F2002/30369 , A61F2002/30462 , A61F2002/30492 , A61F2002/30507 , A61F2002/30515 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30578 , A61F2002/30579 , A61F2002/30616 , A61F2002/30624 , A61F2002/30649 , A61F2002/30662 , A61F2002/3071 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/443 , A61F2220/0025 , A61F2220/0033 , A61F2220/0075 , A61F2230/0015 , A61F2250/0006 , A61F2250/0007 , A61F2250/0009 , A61F2250/0085 , A61F2310/00407 , A61F2310/00796 , A61F2310/00976
摘要： A dynamic posterior stabilization system is provided to stabilize a human spine. In some embodiments, the dynamic posterior stabilization system includes a first bone fastener, a second bone fastener, and an elongated member coupled to the first bone fastener and the second bone fastener. The longitudinal position of the elongated member relative to the first bone fastener may be fixed. The longitudinal position of the second bone fastener relative to the elongated member may vary so that the dynamic posterior stabilization system can accommodate flexion/extension and/or lateral bending. The dynamic posterior stabilization system may also be able to accommodate axial rotation. Bias members may be coupled to the elongated member. The bias members may allow the dynamic posterior stabilization system to mimic the resistance behavior of a normal functional spinal unit.
摘要翻译： 提供动态后稳定系统来稳定人体脊柱。 在一些实施例中，动态后稳定系统包括第一骨紧固件，第二骨紧固件和联接到第一骨紧固件和第二骨紧固件的细长构件。 细长构件相对于第一骨紧固件的纵向位置可以是固定的。 第二骨紧固件相对于细长构件的纵向位置可以改变，使得动态后稳定系统可适应屈曲/伸展和/或横向弯曲。 动态后稳定系统也可能能够适应轴向旋转。 偏置构件可以联接到细长构件。 偏置构件可以允许动态后稳定系统模拟正常功能脊柱单元的阻力行为。
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公开(公告)号：US07799082B2
公开(公告)日：2010-09-21
申请号：US11371188
申请日：2006-03-08
IPC分类号： A61F2/44
CPC分类号： A61B17/7023 , A61B17/1671 , A61B17/1757 , A61B17/7005 , A61B17/7008 , A61B17/7032 , A61B17/7037 , A61B17/704 , A61B17/7041 , A61B17/7052 , A61B17/7064 , A61B17/746 , A61B17/86 , A61B17/8897 , A61B2017/0256 , A61F2/30767 , A61F2/30771 , A61F2/4405 , A61F2/4425 , A61F2/4684 , A61F2002/30133 , A61F2002/30364 , A61F2002/30365 , A61F2002/30369 , A61F2002/30462 , A61F2002/30492 , A61F2002/30507 , A61F2002/30515 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30578 , A61F2002/30579 , A61F2002/30616 , A61F2002/30624 , A61F2002/30649 , A61F2002/30662 , A61F2002/3071 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/443 , A61F2220/0025 , A61F2220/0033 , A61F2220/0075 , A61F2230/0015 , A61F2250/0006 , A61F2250/0007 , A61F2250/0009 , A61F2250/0085 , A61F2310/00407 , A61F2310/00796 , A61F2310/00976
摘要： A stabilization system for a human spine is provided comprising at least two dynamic interbody device and at least one dynamic posterior stabilization system. In some embodiments the stabilization system comprises a pair of dynamic interbody devices and a pair of dynamic posterior stabilization systems. The dynamic interbody devices may work in conjunction with the dynamic posterior stabilization systems to allow for movement of vertebrae coupled to the stabilization system. The dynamic posterior stabilization systems may provide resistance to movement that mimics the resistance provided by a normal functional spinal unit. In some embodiments, a bridge may couple a dynamic interbody device to a dynamic posterior stabilization system.
摘要翻译： 提供了一种用于人体脊柱的稳定系统，其包括至少两个动态体间装置和至少一个动态后稳定系统。 在一些实施例中，稳定系统包括一对动态体间装置和一对动态后稳定系统。 动态体间装置可以与动态后稳定系统一起工作，以允许连接到稳定系统的椎骨的移动。 动态后稳定系统可以提供模拟由正常功能性脊柱单元提供的阻力的运动阻力。 在一些实施例中，桥可以将动态体间设备耦合到动态后稳定系统。
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公开(公告)号：US07753958B2
公开(公告)日：2010-07-13
申请号：US11050632
申请日：2005-02-03
IPC分类号： A61F2/44
CPC分类号： A61B17/7023 , A61B17/7005 , A61B17/7007 , A61B17/7008 , A61B17/701 , A61B17/7032 , A61B17/7037 , A61B17/7064 , A61B17/80 , A61B17/86 , A61F2/30767 , A61F2/4405 , A61F2/4425 , A61F2/4455 , A61F2/4611 , A61F2002/2835 , A61F2002/30092 , A61F2002/30131 , A61F2002/30133 , A61F2002/30225 , A61F2002/3023 , A61F2002/30235 , A61F2002/30365 , A61F2002/30369 , A61F2002/3038 , A61F2002/30383 , A61F2002/30462 , A61F2002/30471 , A61F2002/30476 , A61F2002/30492 , A61F2002/305 , A61F2002/30505 , A61F2002/30507 , A61F2002/30515 , A61F2002/3052 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30563 , A61F2002/30565 , A61F2002/30578 , A61F2002/30579 , A61F2002/30601 , A61F2002/30626 , A61F2002/30649 , A61F2002/30662 , A61F2002/30772 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/30904 , A61F2002/443 , A61F2002/4622 , A61F2002/4627 , A61F2002/4628 , A61F2002/4629 , A61F2210/0014 , A61F2220/0025 , A61F2220/0033 , A61F2220/0075 , A61F2220/0091 , A61F2230/0013 , A61F2230/0015 , A61F2230/0069 , A61F2250/0006 , A61F2250/0009 , A61F2310/00023
摘要： An expandable intervertebral implant for insertion between vertebrae of a human spine is described. The intervertebral implant includes an upper body that engages a first vertebra of the human spine, a lower body that engages a second vertebra of the human spine, an insert, and an advancing element. The advancing element may engage the insert such that advancement of the advancing element causes the insert to at least partially rotate between the upper body and the lower body. Rotation of the insert may cause the insert to interact with at least a portion of the upper body or at least a portion of the lower body to increase a separation distance between the upper body and the lower body, thereby increasing a height of the intervertebral implant after insertion of the implant between the first vertebra and the second vertebra of the human spine.
摘要翻译： 描述了用于插入人脊椎骨之间的可扩展椎间植入物。 椎间植入物包括接合人脊椎的第一椎骨的上身，接合人脊椎的第二椎骨的下身，插入物和前进元件。 前进元件可以接合插入件，使得推进元件的前进使得插入件在上身和下体之间至少部分地旋转。 插入物的旋转可能导致插入物与上身体的至少一部分或下体的至少一部分相互作用，以增加上身和下体之间的间隔距离，从而增加椎间植入物的高度 在植入物插入人脊椎的第一椎骨和第二椎骨之后。
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公开(公告)号：US07708778B2
公开(公告)日：2010-05-04
申请号：US11134066
申请日：2005-05-20
IPC分类号： A61F2/44
CPC分类号： A61B17/7023 , A61B17/7005 , A61B17/7007 , A61B17/7008 , A61B17/701 , A61B17/7032 , A61B17/7037 , A61B17/7064 , A61B17/80 , A61B17/86 , A61F2/30767 , A61F2/4405 , A61F2/4425 , A61F2/4455 , A61F2/4611 , A61F2002/2835 , A61F2002/30092 , A61F2002/30131 , A61F2002/30133 , A61F2002/30225 , A61F2002/3023 , A61F2002/30235 , A61F2002/30365 , A61F2002/30369 , A61F2002/3038 , A61F2002/30383 , A61F2002/30462 , A61F2002/30471 , A61F2002/30476 , A61F2002/30492 , A61F2002/305 , A61F2002/30505 , A61F2002/30507 , A61F2002/30515 , A61F2002/3052 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30563 , A61F2002/30565 , A61F2002/30578 , A61F2002/30579 , A61F2002/30601 , A61F2002/30626 , A61F2002/30649 , A61F2002/30662 , A61F2002/30772 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/30904 , A61F2002/443 , A61F2002/4622 , A61F2002/4627 , A61F2002/4628 , A61F2002/4629 , A61F2210/0014 , A61F2220/0025 , A61F2220/0033 , A61F2220/0075 , A61F2220/0091 , A61F2230/0013 , A61F2230/0015 , A61F2230/0069 , A61F2250/0006 , A61F2250/0009 , A61F2310/00023
摘要： An articulating expandable intervertebral implant for insertion between vertebrae of a human spine is described. The articulating expandable intervertebral implant includes an upper body that engages a first vertebra of the human spine, a lower body that engages a second vertebra of the human spine, and an elongated member. The superior surface of the lower body includes a channel. A portion of the inferior surface of the upper body may be substantially concave. The elongated member may include a cam portion along a length of the elongated member. The elongated member may be positioned in the channel of the lower body. The substantially concave portion of the upper body may contact the elongated member, such that rotation of the elongated member about a longitudinal axis of the elongated member increases a height and/or increases articulation of the intervertebral implant after insertion of the intervertebral implant.
摘要翻译： 描述了用于在人脊椎骨之间插入的铰接可扩张椎间植入物。 所述关节伸展性椎间植入物包括接合人脊椎的第一椎骨的上身，与所述人脊椎的第二椎骨接合的下身，以及细长构件。 下体的上表面包括通道。 上身的下表面的一部分可以是基本上凹的。 细长构件可以包括沿着细长构件的长度的凸轮部分。 细长构件可以定位在下体的通道中。 上身的基本上凹入的部分可以接触细长构件，使得细长构件围绕细长构件的纵向轴线的旋转增加椎间植入物插入后椎间植入物的高度和/或增加关节。
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公开(公告)号：US08647386B2
公开(公告)日：2014-02-11
申请号：US12841792
申请日：2010-07-22
IPC分类号： A61F2/44
CPC分类号： A61B17/7023 , A61B17/7005 , A61B17/7007 , A61B17/7008 , A61B17/701 , A61B17/7032 , A61B17/7037 , A61B17/7064 , A61B17/80 , A61B17/86 , A61F2/30767 , A61F2/4405 , A61F2/4425 , A61F2/4455 , A61F2/4611 , A61F2002/2835 , A61F2002/30092 , A61F2002/30131 , A61F2002/30133 , A61F2002/30225 , A61F2002/3023 , A61F2002/30235 , A61F2002/30365 , A61F2002/30369 , A61F2002/3038 , A61F2002/30383 , A61F2002/30462 , A61F2002/30471 , A61F2002/30476 , A61F2002/30492 , A61F2002/305 , A61F2002/30505 , A61F2002/30507 , A61F2002/30515 , A61F2002/3052 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30563 , A61F2002/30565 , A61F2002/30578 , A61F2002/30579 , A61F2002/30601 , A61F2002/30626 , A61F2002/30649 , A61F2002/30662 , A61F2002/30772 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/30904 , A61F2002/443 , A61F2002/4622 , A61F2002/4627 , A61F2002/4628 , A61F2002/4629 , A61F2210/0014 , A61F2220/0025 , A61F2220/0033 , A61F2220/0075 , A61F2220/0091 , A61F2230/0013 , A61F2230/0015 , A61F2230/0069 , A61F2250/0006 , A61F2250/0009 , A61F2310/00023
摘要： An intervertebral implant system for a human spine including a first body having a first external surface to be disposed adjacent a first vertebrae during use and a first internal surface opposite the first external surface, a second body having a second external surface to be disposed adjacent a second vertebrae during use and a second internal surface opposite the second external surface, an elongated insertion instrument releasable coupleable to the first or second body during use, and a spacer linearly advanced between the first internal surface of the first body and the first internal surface of the second body during use. The elongated insertion instrument guides at least a portion of the linear advancement of the spacer, and wherein the linear advancement of the spacer results in expansion of the intervertebral implant such that the first external surface and the second external surface move away from one another to expand a height of the implant.
摘要翻译： 一种用于人体脊柱的椎间植入物系统，包括第一体，所述第一体具有在使用期间邻近第一椎骨设置的第一外表面和与所述第一外表面相对的第一内表面;第二体，具有邻近设置的第二外表面 在使用期间的第二椎骨和与第二外表面相对的第二内表面，在使用期间可释放地耦合到第一或第二身体的细长插入器具，以及在第一主体的第一内表面和第一内表面之间线性前进的间隔 使用中的第二个身体。 细长插入器械引导间隔件的线性前进的至少一部分，并且其中间隔件的线性前进导致椎间植入物的膨胀，使得第一外表面和第二外表面彼此远离彼此移动以扩展 植入物的高度。
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公开(公告)号：US08123810B2
公开(公告)日：2012-02-28
申请号：US11134069
申请日：2005-05-20
IPC分类号： A61F2/44
CPC分类号： A61B17/7023 , A61B17/7005 , A61B17/7007 , A61B17/7008 , A61B17/701 , A61B17/7032 , A61B17/7037 , A61B17/7064 , A61B17/80 , A61B17/86 , A61F2/30767 , A61F2/4405 , A61F2/4425 , A61F2/4455 , A61F2/4611 , A61F2002/2835 , A61F2002/30092 , A61F2002/30131 , A61F2002/30133 , A61F2002/30225 , A61F2002/3023 , A61F2002/30235 , A61F2002/30365 , A61F2002/30369 , A61F2002/3038 , A61F2002/30383 , A61F2002/30462 , A61F2002/30471 , A61F2002/30476 , A61F2002/30492 , A61F2002/305 , A61F2002/30505 , A61F2002/30507 , A61F2002/30515 , A61F2002/3052 , A61F2002/30538 , A61F2002/3055 , A61F2002/30556 , A61F2002/30563 , A61F2002/30565 , A61F2002/30578 , A61F2002/30579 , A61F2002/30601 , A61F2002/30626 , A61F2002/30649 , A61F2002/30662 , A61F2002/30772 , A61F2002/30785 , A61F2002/30794 , A61F2002/30841 , A61F2002/30904 , A61F2002/443 , A61F2002/4622 , A61F2002/4627 , A61F2002/4628 , A61F2002/4629 , A61F2210/0014 , A61F2220/0025 , A61F2220/0033 , A61F2220/0075 , A61F2220/0091 , A61F2230/0013 , A61F2230/0015 , A61F2230/0069 , A61F2250/0006 , A61F2250/0009 , A61F2310/00023
摘要： An expandable intervertebral implant is described for insertion between vertebrae of a human spine. The intervertebral implant includes an upper body that engages a first vertebra of the human spine, a lower body that engages a second vertebra of the human spine, an insert, and an expansion member. The expansion member may include a first angled portion and a second angled portion. The expansion member may be advanced such that a first angled portion of the expansion member engages an angled portion of the insert to increase a separation distance between the upper body and the lower body of the intervertebral implant. An advancing element may engage a second angled portion of the expansion member such that a direction of advancement of the advancing element is different than the direction of advancement of the expansion member.
摘要翻译： 描述了可扩展的椎间植入物用于插入人脊椎的椎骨之间。 椎间植入物包括接合人脊椎的第一椎骨的上身，接合人脊椎的第二椎骨的下身，插入物和扩张构件。 膨胀构件可包括第一倾斜部分和第二倾斜部分。 膨胀构件可以前进，使得膨胀构件的第一倾斜部分接合插入件的成角度部分，以增加椎体植入物的上身和下体之间的间隔距离。 推进元件可以接合膨胀构件的第二倾斜部分，使得推进元件的前进方向不同于膨胀构件的前进方向。
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