CN102133132B - Dynamic screw implant for pedicle of vertebral arch - Google Patents

Dynamic screw implant for pedicle of vertebral arch Download PDF

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Publication number
CN102133132B
CN102133132B CN 201010623046 CN201010623046A CN102133132B CN 102133132 B CN102133132 B CN 102133132B CN 201010623046 CN201010623046 CN 201010623046 CN 201010623046 A CN201010623046 A CN 201010623046A CN 102133132 B CN102133132 B CN 102133132B
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China
Prior art keywords
screw
implant
seat
caps
dynamic pedicle
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CN 201010623046
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Chinese (zh)
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CN102133132A (en
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李雷
田芳
刘道志
冯勇
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上海微创骨科医疗科技有限公司
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Publication of CN102133132A publication Critical patent/CN102133132A/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • 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
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7037Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped

Abstract

本发明涉及动态椎弓根螺钉植入物。 The present invention relates to a dynamic pedicle screw implant. 具体地,提供了一种动态椎弓根螺钉植入物,包括:螺钉座;压环;螺钉;连接棒;以及压紧螺母,其中所述螺钉包括螺钉主体和连接头,该连接头容纳在所述螺钉座内;所述连接棒设置于所述螺钉座的开槽中,并且位于压环和所述压紧螺母之间;所述压紧螺母用于拧入所述螺钉座的上部,从而压紧所述连接棒。 In particular, a dynamic pedicle screw implant, comprising: a screw seat; pressing ring; screw; connecting rod; and a compression nut, wherein the screw comprises a screw body and a connector, the connector received in the inner screw seat; the connecting rod is provided on the seat of the grooved screw and located between the compression ring and the compression nut; the compression nut is screwed into the screw for the upper seat, thereby compressing the connecting rod. 所述动态椎弓根螺钉植入物还设置有螺钉头套,该螺钉头套的内部为球窝结构,所述螺钉的连接头具有球形外部结构,从而该球窝结构能够与所述螺钉的连接头相配合。 The dynamic pedicle screw implant is also provided with screw caps, screw caps to the interior of the ball and socket configuration, said screw having a spherical head connected to an external structure, such that the ball structure can be connected to the screw head mate. 因而,可以使得螺钉既能提供传统多轴向的摆动角,还能在锁紧后提供额外的角度摆动且保证脊柱的稳定性。 Accordingly, the screw can be made not only traditional multi-axial deflection angle, but also to provide additional pivot angle of the locking and ensure stability of the spine.

Description

动态椎弓根螺钉植入物 Dynamic pedicle screw implant

技术领域 FIELD

[0001] 本发明涉及技术领域为骨科内植物技术领域,特别地涉及动态椎弓根螺钉植入物。 [0001] The present invention relates to the field of orthopedic implant technical field, particularly relates to a dynamic pedicle screw implant.

背景技术 Background technique

[0002] 当椎间盘退变或小关节滑脱或退变时,导致椎间高度丢失,后方结构不稳,从而导致椎间孔和椎孔狭窄,而这种狭窄会压迫脊神经或神经根,导致病人腰腿疼、麻木等症状,严重影响病人的生活质量。 [0002] When disc degeneration or facet joint degeneration or slip, leading to loss of intervertebral height, rear structural instability, resulting foramen and vertebral foramen narrow, and this narrow compresses the nerve roots or spinal nerve, resulting in the patient waist and leg pain, numbness and other symptoms, seriously affecting the quality of life of patients.

[0003] 在解决这一问题上已知的方法是医药保守治疗,这种方式旨在控制病症,即疼痛、麻木,而非矫正以解决问题。 [0003] In the known method to solve this problem is to conservative treatment medicine, which are intended to control the condition, i.e., pain, numbness, and not to solve the problem corrected. 对于一些患者,这可能需要长期的治疗,而这可能需要长期使用止痛药,可能会引起病人的精神状态或其他不良副作用。 For some patients, this may require long-term treatment, which may require long-term use of painkillers may cause a patient's mental state or other adverse side effects.

[0004] 另一种已知的方法是椎间融合或棘突间融合,这样可以保持椎间高度,减少神经结构的压力。 [0004] Another known method is interspinous interbody fusion or fusion, so can maintain disc height, to reduce the pressure of the neural structures. 可以采用融合器,各种板状器件和椎弓根螺钉系统进行固定。 Fusion device may be employed, and a variety of plate-like components are fixed pedicle screw system. 然而,融合会使上下两个椎体生长成一个整体,使得病人丧失了活动能力,因为它阻止了脊柱在问题节段的任何方向的运动。 However, the fusion of two vertebrae would grow into a whole, so that patients lose mobility, because it prevents the movement of the spine in any direction questions segment of. 而且更为严重的是它带来了新的问题,邻近脊柱节段的退变。 But more serious is that it has brought new problems, degeneration of adjacent segments of the spine.

[0005] 已知的是脊柱融合节段的相对固定会导致应力向邻近椎体集中,尤其加重了相邻椎体的负载。 [0005] It is known that a relatively spinal fixation fusion segment can lead to stress concentration adjacent vertebral bodies, in particular increased load adjacent vertebral bodies. 同时,融合节段的活动度丧失导致相邻节段的活动范围增大,以补偿融合节段的活动能力,从而引起邻近节段的生物力学环境异常,生物力学环境的改变最终导致了邻近节段退变。 At the same time, activity of fusion segments lead to the loss of range of motion of adjacent segments increased to compensate for capacity-building activities fusion segments, causing abnormal biomechanical environment adjacent segments, changing the biomechanical environment eventually led to the adjacent section segment degeneration.

[0006] 因此,脊柱外科医生和研究者研究发现,现有的椎弓根螺钉在植入后不能活动,虽然增加了腰椎的稳定性,但是改变了腰椎的生物力学环境,从而导致邻近节段退变的可能性。 [0006] Accordingly, spine surgeons and researchers found that the existing pedicle screw can not move after implantation, despite an increase in the stability of the lumbar spine, but changed the biomechanical environment of the lumbar spine, resulting in adjacent segments the possibility of change back. 虽然现在已经有一些腰椎动态植入物出现,但是它们的治疗效果较差,会有棘突骨折、植入物松动等相关并发症,从而导致再次手术的可能性。 Although there have been some dynamic lumbar implants appear, but their poor treatment effect, there will spinous process fracture, loosening of the implant and other related complications, leading to the possibility of re-operation. 另一方面,这些植入物不能或不适合治疗较为严重的腰椎退变症状,导致这些植入物的应用范围很窄。 On the other hand, these implants can not or are not suitable for the treatment of the more severe symptoms of lumbar degeneration, resulting in application of these implants is very narrow.

[0007] 专利文献CN200680020249公开了一种棘突间脊椎和腰骶稳定装置及使用方法,具体地,它公开了U形的棘突柔性间隔体,以及构造成接合椎骨的棘突的一对侧向壁;可设置固定套以将椎骨的棘突固定至柔性间隔体;为了将柔性间隔体固定在腰椎骨与相邻椎骨之间,设置锚固组件;还提供了使用所述可植入装置来稳定患者脊柱的方法。 [0007] Patent Document CN200680020249 discloses an inter-spinous process spinal and lumbosacral stabilization devices and methods of use, in particular, which discloses a flexible U-shaped spinous process spacer body, and configured to engage the spinous process of vertebra of the pair of side wall; fixed sleeve may be provided to the spinous processes of vertebrae secured to the flexible spacer body; secured to the flexible spacer between the adjacent vertebrae and the lumbar vertebra, the anchor assembly is provided; also provides the use of the implantable device methods patients with spinal stability.

[0008] 专利文献US 20100100137公开了一种植入物,它包括一个多轴向锚固件和连接件;锚固件具有一个柔性装置,能够提供关节活动,在多轴向锚固件固定后允许一定运动。 [0008] Patent document US 20100100137 discloses an implant comprising a multi-axial anchor member and the connecting member; anchor having a flexible means of motion can be provided, in the multi-axial anchor member fixed to allow a certain movement. 但是该现有技术的结构不太稳定,且只能提供有限的动态活动度;另外,该现有技术的装配性能也不太好。 However, this prior art structure is not stable, and can only provide a limited dynamic activity; Further, the prior art assembly performance is not good.

[0009] 专利文献US 20050192571公开了一种椎弓根柔性组件和方法,该组件包括螺钉头具有公头隆起结构;骨固定结构具有母头凹陷的半球结构组成一个球窝关节;一个锁定固定销子固定螺钉头和骨固定结构;一个挡块,用于保证长轴向的稳定。 [0009] Patent document US 20050192571 discloses a pedicle flexible assembly and method, the assembly comprising a screw head having a male raised structure; bone fixing structure having a hemispherical concave structure composed of a female ball joint; a fixed locking pin a submount fixed structure and bone screw head; a stopper, for ensuring a stable axial length.

[0010] 专利文献CN200480038132公开了一种骨锚定元件和包括这种类型的骨锚定元件的用于骨或脊椎骨的稳定装置,其中骨锚定元件包括一用于锚定在骨中的钉杆,所述杆具有一可锚定在骨中的第一部分和一弹性构成的第二部分;以及包括一钉头,所述钉头构造成用于连接一将至少两个骨锚定元件相连接的杆。 [0010] Patent Document CN200480038132 discloses a device for stabilizing a bone or a vertebra and a bone anchoring element of the type comprising a bone anchoring element, wherein the element comprises a bone anchor for anchoring in a bone nail a rod having a first portion and a second portion consisting of an elastic may be anchored in the bone; and comprising a nail head, a nail head is configured for connection to a bone anchor element at least two phases connecting rod. 该现有技术主要在普通椎弓根头端打下一沉孔直到螺钉颈部,在孔道的壁上切割出螺旋槽沟,此举会显著降低螺钉颈部强度,因而其实际可行性可能不高。 The prior art primarily in the general lay counterbore pedicle head end until the screw neck, the tunnel wall of the spiral grooves are cut, this will significantly reduce the strength of the screw neck, which thus may not be practical feasibility of high .

发明内容 SUMMARY

[0011] 鉴于现有技术的缺陷,本发明的目的在于开发一种动态椎弓根螺钉植入物,这种动态椎弓根螺钉植入物使得螺钉既能提供传统多轴向的摆动角,还能在锁紧后提供额外的角度摆动且保证脊柱的稳定性。 [0011] In view of the deficiencies of the prior art, an object of the present invention is to develop a dynamic pedicle screw implant, this dynamic pedicle screw such that the screw implant both traditional multi-axial deflection angle, also provides additional angular swing and guarantee the stability of the spine after locking.

[0012] 根据本发明的第一方面,提供了一种动态椎弓根螺钉植入物,包括:螺钉座;压环;螺钉;连接棒;以及压紧螺母, [0012] According to a first aspect of the present invention, there is provided a dynamic pedicle screw implant, comprising: a screw seat; pressing ring; screw; connecting rod; and a compression nut,

[0013] 其中,所述螺钉包括螺钉主体和连接头,该连接头容纳在所述螺钉座内;所述连接棒设置于所述螺钉座的开槽中,并且位于所述压环和所述压紧螺母之间;所述压紧螺母用于拧入所述螺钉座的上部,从而压紧所述连接棒, [0013] wherein said screw comprises a screw body and a connector, the connector housed in the head of the screw seat; the connecting rod is provided on the grooved screw seat, and located in said pressure ring and said compression between the nut; the compression nut is screwed into the screw for the upper seat, thereby compressing the connecting rod,

[0014] 其特征在于: [0014] wherein:

[0015] 所述动态椎弓根螺钉植入物还设置有螺钉头套,该螺钉头套的内部为球窝结构,所述螺钉的连接头具有球形外部结构,从而该球窝结构能够与所述螺钉的连接头相配合。 [0015] The dynamic pedicle screw implant is also provided with screw caps, screw caps to the interior of the ball and socket configuration, said screw having a spherical head connected to an external structure, such that the ball and socket structure capable of the screw the mating connector.

[0016] 根据上述的结构,提供了螺钉头套,该螺钉头套的主要作用是将螺钉的连接头包裹住,使得万向螺钉的螺钉头即使在固定后仍然可以在螺钉头套内做多轴向的微小角度摆动。 [0016] According to the arrangement, there is provided a screw caps, screw caps primary role is to wrap the screw connector housing, such that the universal screw head of the screw even after the fixing sleeve can still be done in the multi-axial screw head slight angle swing. 因而,这种螺钉既有传统多轴向的摆动角,在锁紧后还能提供额外的角度摆动,并且能够保证脊柱的稳定性。 Thus, both such conventional multi-axial screw swing angle, after the latch can provide additional pivot angle, and to ensure stability of the spine. 额外的角度摆动可以防止邻近节段因坚强固定而导致的过度载荷,从而防止了邻近节段的退变。 Additional swing angle can prevent excessive load due to the strong fixation of adjacent segments caused, thereby preventing degeneration of adjacent segments.

[0017] 优选的是,所述螺钉头套的下部具有唇结构,该唇结构与所述螺钉的颈部相配合,并布置成使得该唇结构的内侧能够限制螺钉的副摆动角,且该唇结构的外侧能够控制螺钉的主摆动角。 [0017] Preferably, the lower portion of the screw headgear structure having a lip, the lip structure and the neck screw cooperates, and arranged such that the inside of the sub-lip structure can restrict the swing angle of the screw, and the lip a main outer structure capable of controlling a swing angle of the screw.

[0018] 根据上述的结构,螺钉头套的唇部与螺钉的颈部设计成可以限制螺钉摆动角度的范围。 [0018] According to the above configuration, the lip portion of the screw neck screw caps designed to limit the pivot angle range of the screw. 从而,本发明的结构可以增加螺钉的小角度摆动,可以改进邻近节段的应力分布,降低邻近节段退变可能性,维持脊柱生理活动范围,从而实现动态固定。 Thus, the structure of the present invention can increase the small oscillating angle of the screw can be improved stress distribution in the adjacent segments, adjacent segments to reduce the possibility of degeneration, maintain the physiological range of motion of the spine, thereby achieving dynamic stabilization.

[0019] 优选的是,所述压环的内部具有内凹面,所述内凹面为球形,以便与所述螺钉头套的球形外壁相配合。 [0019] Preferably, the inside of the pressure ring has an inner concave surface, the concave surface is spherical, the spherical to mate with the outer wall of the screw caps.

[0020] 根据上述的结构,压环的内球面与螺钉头套的外球面配合,使得在螺钉头套包住螺钉并装入螺钉座后具有多轴向的大角度摆动,从而实现传统万向螺钉,以方便医生从各个角度执行植入。 [0020] Spherical inner spherical surface and the screw head covering structure according to the pressure ring fit, so that the wrap of the screw caps and screw mount screw seat having a large angle multi-axial pivot, so as to realize a traditional screw joint, in convenient for doctors to perform the implant from all angles. 由此,本发明既能提供植入过程中螺钉大角度的要求,也能提供植入后的小位移摆动。 Thus, the present invention provides not only a screw implant procedure requires a large angle, also provides a small swing displacement after implantation.

[0021] 优选的是,所述螺钉头套的球形外壁上具有台阶部,以使得所述压环的内凹面与所述螺钉头套的台阶部相接触。 [0021] Preferably, the outer wall of the ball screw headgear having a stepped portion, so that the inner concave surface of the pressure ring and the stepped portion of the screw is in contact with the headgear.

[0022] 根据上述的结构,所述压环的内凹面与所述螺钉头套的台阶部相接触并且传递压力,从而能够对螺钉的多轴向的大角度摆动进行更好的控制。 [0022] According to the above configuration, the inner concave surface of the pressure ring in contact with the stepped portion and the delivery pressure of the screw caps, whereby capable of multi-axial screw large angle swing better control. [0023] 优选的是,所述压环的外周与所述螺钉座的内腔配合,从而所述压环能够沿所述螺钉座轴向运动。 [0023] Preferably, the press-fitting an outer periphery of the inner cavity of the screw seat ring, so that the pressure ring can be axially along the screw seat movement.

[0024] 根据上述的结构,所述压环能够沿所述螺钉座轴向运动,从而能够更好地实现本发明的动态椎弓根螺钉植入物的装配,并且通过压紧螺母从上部的拧入,可以将螺钉头套固定在螺钉座内,以利于对螺钉的多轴向的大角度摆动的控制。 [0024] According to the above configuration, the pressure ring can be axially along the screw seat movement, it is possible to achieve better dynamic pedicle screw assembly implant material of the present invention, and from the top by compression nut screwed, screw caps may be fixed in the screw housing, in order to facilitate the control of multi-axial screw large swing angle.

[0025] 优选的是,所述螺钉头套的外周具有多个条形开槽。 [0025] Preferably, the outer periphery of the screw strip having a plurality of slotted headgear.

[0026] 根据上述的结构,条形开槽可以在螺钉的连接头插入螺钉头套时提供扩张的空间,以便于螺钉的插入。 Expanded to provide space for the screw is inserted into [0026] According to the arrangement, the strip can be inserted into a screw slotted headgear connector screws.

[0027] 优选的是,所述动态椎弓根螺钉植入物包括挡圈,所述挡圈用于嵌入到所述螺钉座的内腔的下部的凹槽中,同时与所述螺钉头套相接触。 [0027] Preferably, the dynamic pedicle screw implant comprises a ring, the retaining ring groove for embedding a lower lumen to seat the screw while the screw relative to the headgear contact. [0028] 根据上述的结构,可以将螺钉头套固定在螺钉座内,从而限制螺钉在轴向上的位移,以利于对螺钉的多轴向的大角度摆动的控制。 [0028] According to the configuration, screw caps may be secured within the screw seat, thereby limiting the axial displacement of the screw, in order to facilitate the control of multi-axial screw large swing angle.

[0029] 优选的是,所述挡圈中设置有开口。 [0029] Preferably, the collar is provided with an opening.

[0030] 根据上述的结构,挡圈设置有开口,从而可以方便挡圈的嵌入组装。 [0030] According to the above configuration, the retaining ring is provided with an opening, which can easily be embedded in the ring assembly.

[0031] 总之,根据本发明的技术方案,可以使得万向螺钉提供了动态固定的性能;并且,能够使得螺钉植入后可以自适应脊柱的弯曲中心;并且可以防止脊柱的邻近节段退变。 [0031] In summary, according to the aspect of the present invention, such a universal fixing screw offers dynamic performance; and, the center of curvature such that the screw can be implanted in the spine can be adaptive; adjacent segments can be prevented degeneration of the spine . 从而,可以在恢复椎间高度、减少脊神经压力、提供脊柱稳定性的同时,保持脊柱的正常旋转中心,提供治疗后的微动,降低脊柱邻近节段退变的可能性。 Thus, it is possible to restore disc height while reducing the pressure spinal nerve, spinal stability provided to maintain normal rotation center of the spine, to provide fine movement after treatment, reducing the likelihood of the spine adjacent segment degeneration.

[0032] 从下面参考附图所描述的优选实施例中很容易理解本发明的上述特征和优点。 [0032] From the described preferred embodiments below with reference to the drawings easily understood that the above features and advantages of the present invention.

附图说明 BRIEF DESCRIPTION

[0033] 图I是本发明的动态椎弓根螺钉植入物的整体透视图。 [0033] Figure I is a dynamic pedicle screw implant of the present invention is an overall perspective view thereof.

[0034] 图2是本发明的动态椎弓根螺钉植入物的分解透视图。 [0034] FIG. 2 is an exploded perspective view of a dynamic pedicle screw implant according to the present invention.

[0035] 图3是本发明的动态椎弓根螺钉植入物的横剖视图。 [0035] FIG. 3 is a cross sectional view of a dynamic pedicle screw implant according to the present invention.

[0036] 图4是本发明的动态椎弓根螺钉植入物的螺钉的示意图,其中图4 [0036] FIG. 4 is a schematic view of a dynamic pedicle screw implant screw according to the present invention thereof, wherein FIG. 4

[0037] (a)是螺钉的透视图,图4 (b)是螺钉的横剖视图。 [0037] (a) is a perspective view of the screw of FIG. 4 (b) is a cross sectional view of a screw.

[0038] 图5是本发明的动态椎弓根螺钉植入物的挡圈的透视图。 [0038] FIG. 5 is a dynamic pedicle screw implant according to the present invention, a perspective view of the retaining ring thereof.

[0039] 图6是本发明的动态椎弓根螺钉植入物的螺钉头套的示意图,其中 [0039] FIG. 6 is a schematic view of a dynamic pedicle screw implant screw according to the present invention headgear thereof, wherein

[0040] 图6 (a)是螺钉头套的横剖视图,图6 (b)是螺钉头套的透视图,图6 (c)是螺钉头套的正视图,图6(d)是螺钉头套的顶视图。 [0040] FIG. 6 (a) is a cross sectional view of a screw caps, and FIG. 6 (b) is a perspective view of the screw caps, and FIG. 6 (c) is a screw caps a front view, FIG. 6 (d) is a top view of a screw headgear .

[0041] 图7是本发明的动态椎弓根螺钉植入物的压环的示意图,其中图7(a)是压环的透视图,图7(b)是压环的横剖视图。 [0041] FIG. 7 is a schematic diagram of the pressure ring was a dynamic pedicle screw implant according to the present invention, wherein FIG. 7 (a) is a perspective view of the pressure ring, FIG. 7 (b) is a cross sectional view of a pressure ring.

[0042] 图8是本发明的动态椎弓根螺钉植入物的螺钉座的示意图,其中图8 (a)是螺钉座的透视图,图8(b)是螺钉座的横剖视图。 [0042] FIG. 8 is a schematic view of a dynamic pedicle screw implant according to the present invention, the screw seat thereof, wherein FIG. 8 (a) is a perspective view of the screw seat, FIG. 8 (b) is a cross sectional view of the screw seat.

具体实施方式 Detailed ways

[0043] 以下参考附图来详细描述本发明的优选实施例。 [0043] with reference to the following detailed description of preferred embodiments of the present invention, the accompanying drawings.

[0044] 图I是本发明的动态椎弓根螺钉植入物的整体透视图,图2是本发明的动态椎弓根螺钉植入物的分解透视图,图3是本发明的动态椎弓根螺钉植入物的横剖视图。 [0044] Figure I is an overall perspective view of a dynamic pedicle screw implant according to the present invention, FIG 2 is an exploded perspective view of a dynamic pedicle screw implant according to the present invention, FIG. 3 of the present invention is a dynamic pedicle was cross-sectional view of the implant of screws. [0045] 参看图1-3,本发明的用于植入在椎体之中的动态椎弓根螺钉植入物包括:螺钉座I ;压环2 ;螺钉头套3 ;螺钉4 ;挡圈5 ;连接棒6 ;以及压紧螺母7。 [0045] Referring to FIG 1-3, the present invention is implanted in the vertebral body implant dynamic pedicle screw comprising: a screw seat I; pressing ring 2; 3 caps screw; screw 4; 5 ring ; connecting rod 6; 7 and the compression nut.

[0046] 图4是本发明的动态椎弓根螺钉植入物的螺钉4的示意图,其中图4(a)是螺钉的透视图,图4(b)是螺钉的横剖视图。 [0046] FIG. 4 is a schematic view of a dynamic pedicle screw 4 of the present invention was implant screw, wherein FIG. 4 (a) is a perspective view of the screw of FIG. 4 (b) is a cross sectional view of a screw. 从图4看看出,本发明的动态椎弓根螺钉植入物的螺钉包括螺钉主体16和连接头8。 See FIG. 4 from the screw dynamic pedicle screw implant of the present invention comprises a screw body 16 and the connector 8. 螺钉主体16具有用于骨固定、特别是用于椎骨固定的螺纹结构。 A screw 16 having a bone fixation body, in particular for vertebral fixation screw structure. 连接头8大体具有球形的外形,并且位于螺钉主体16的一端且与螺钉主体16 —体地相连。 8 connector having a generally spherical shape, and at one end of the screw body 16 and the screw body 16 - is connected to the body. 螺钉4的连接头8可以插入到螺钉头套3的球窝结构13中,从而与螺钉头套3相连接。 8 of the screw 4 connector may be inserted into the headgear of the ball screw 13 of the structure 3, so that the screw 3 is connected to the headgear. 连接头8的顶端设置有便于器械连接的接口9。 Connected to the top head 8 is provided with a device to facilitate an interface 9 connected.

[0047] 图5是本发明的动态椎弓根螺钉植入物的挡圈5的透视图。 [0047] FIG. 5 is a perspective view of a dynamic pedicle screw implant of the present invention the retaining ring 5. 挡圈5可以嵌入到螺钉座I下部的凹槽17中,同时与螺钉头套3接触,因而它能限制螺钉4脱出,同时提供螺钉4的摆动角度。 5 may be embedded into the ring groove 17 of the lower portion of the screw seat I, while in contact with the screw caps 3, 4 and thus can limit screw extrusion, while providing a pivot angle of the screw 4. 优选地,挡圈5设置有开口18,以便于挡圈5的嵌入组装。 Preferably, the retaining ring 5 is provided with an opening 18, in order to insert the retaining ring 5 is assembled.

[0048] 图6是本发明的动态椎弓根螺钉植入物的螺钉头套3的示意图,其中图6(a)是螺钉头套3的横剖视图,图6(b)是螺钉头套3的透视图,图6(c)是螺钉头套3的正视图,图6(d)是螺钉头套3的顶视图。 [0048] FIG. 6 is a schematic view of a dynamic pedicle screw caps according to the present invention, the screw implant 3, wherein FIG. 6 (a) is a cross sectional view of the screw caps. 3, FIG. 6 (b) is a perspective view of the screw 3 of the headgear , FIG. 6 (c) is a front view of a screw head covering 3, FIG. 6 (d) is a top view of the screw 3 of the headgear. 具体地,螺钉头套3整体上为大体空心球的结构。 In particular, the screw caps on the whole structure 3 substantially hollow spheres. 螺钉头套3在其上部具有上部通孔10,在其下部具有下部通孔11。 Screw caps 3 having an upper through hole 10 at its upper portion, a lower portion having a through hole 11 at its lower portion. 上部通孔10方便上钉器械拧入,下部通孔11是用于插入螺钉4的插入孔。 An upper through hole 10 to facilitate the staple instrument is screwed into the lower through hole 11 is inserted into the hole for inserting the screw 4. 螺钉头套3的外周具有多个条形开槽12 ;优选地,在本实施例中,螺钉头套3的外周的上下两侧各有三个条形开槽12。 The outer periphery of the screw 3 having a plurality of strip-shaped headgear slot 12; Preferably, embodiment, the screw head covering upper and lower sides of the outer periphery of each of the three 3 bar slot 12 in the present embodiment. 这些条形开槽12可以在螺钉4的连接头8插入螺钉头套3时提供扩张的空间,以便于螺钉4的插入。 The strip 12 may be slotted to provide expansion headgear screw insertion space 3 when the screw 4 is connected to the head 8, to facilitate the insertion of the screw 4.

[0049] 从图6可以看出,螺钉头套3的内部为球窝结构13,该球窝结构13用于配合螺钉4的连接头8,从而形成球窝关节。 [0049] As can be seen from FIG. 6, an internal screw caps 3 of a ball and socket structure 13, 13 of the ball and socket structure for fitting a screw connector 84, thereby forming a ball joint. 螺钉头套3的球形外壁上具有台阶部14,该台阶部14在螺钉头套3的高度方向上直径逐渐减小。 Screw caps spherical outer wall 3 has a stepped portion 14, the step of decreasing diameter portion 14 in the height direction of the screw 3 of the headgear. 该台阶部14可以与压环2的内凹面19配合,以传递压力载荷,以便锁定螺钉的主摆动角。 The stepped portion 14 can be press-ring 19 with the inner concave surface 2, to transmit the load pressure, so as to lock the swing angle of the main screw. 螺钉头套3的下部具有唇结构15,该唇结构15的内侧可以限制螺钉的副摆动角,该唇结构15的外侧可以控制螺钉的主摆动角度。 Screw caps 3 having a lower lip structure 15, the structure of the inner lip 15 may limit the swing angle of the sub-screw, the outer lip 15 may control the configuration of the main screw pivot angle.

[0050] 图7是本发明的动态椎弓根螺钉植入物的压环2的示意图,其中图7(a)是压环2的透视图,图7(b)是压环2的横剖视图。 [0050] FIG. 7 is a schematic view of a dynamic pressure ring pedicle screw implant 2 according to the invention, wherein FIG. 7 (a) is a perspective view of the pressure ring 2, FIG. 7 (b) is a cross sectional view of a pressure ring 2 . 压环2具有上钉器械插入孔20。 A staple pressing ring 2 has an upper instrument insertion hole 20. 压环2的外周与螺钉座I的内腔配合,从而压环2可以沿螺钉座I轴向运动。 Pressure ring 2 and the outer periphery of the screw holder lumen with I, I 2 may be such that the pressure ring axial movement of the screw seat. 压环2的内部为球形的内凹面19,内凹面19与螺钉头套3的台阶部14相接触。 Internal pressure ring 2 is within a spherical concave surface 19, concave surface 19 in contact with the stepped portion 14 of the screw 3 of the headgear. 压环2依靠设于上部的连接棒6向螺钉头套I提供压力。 2 relies on pressure ring provided on the upper portion of the connecting rod 6 to provide pressure to the screw caps I.

[0051] 图8是本发明的动态椎弓根螺钉植入物的螺钉座I的示意图,其中图8(a)是螺钉座I的透视图,图8(b)是螺钉座I的横剖视图。 [0051] FIG. 8 is a schematic view of a dynamic pedicle screw seat screw implant I of the present invention, wherein FIG. 8 (a) is a perspective view of the screw seat I, FIG. 8 (b) is a cross sectional view of the screw seat I . 螺钉座I具有内腔21,所述内腔21包括带螺纹的上部部分和光滑的下部部分,所述内腔21可以容纳挡圈5、螺钉4的连接头8、螺钉头套3和压环2,并对压环2沿轴向移动提供导向作用。 I screw seat 21 having a lumen, the lumen 21 comprises an upper threaded portion and a smooth lower portion, the lumen 21 can accommodate the retaining ring 5, the head 4 of the screw connection 8, screw caps 3 and ferrule 2 , the pressure ring 2 and the guiding action provided axially movable. 螺钉座I还具有U型开槽22,用于放置连接棒6。 I further screw seat having a U-shaped slot 22, for placement of the connecting rod 6. 螺钉座I的上部的内侧面具有螺纹结构,以便于与压紧螺母7啮合连接。 The inner side of the upper screw threaded holder I having the structure, so that the compression nut to the mating connector 7. 螺钉座I的内腔21的光滑的下部部分的下部周壁中沿着圆周方向设置有一凹槽17,挡圈5可以嵌入到螺钉座I的该凹槽17中,以用于固定挡圈17,从而限制螺钉4的向下位移。 Screw seat smooth peripheral of the bottom portion of the lower portion I of the lumen 21 is provided along the circumferential direction with a groove 17, the retaining ring 5 can be fitted into the screw seat I of the recess 17, 17 for retaining ring, thereby limiting the downward displacement of the screw 4.

[0052] 连接棒6用于连接多个螺钉,连接棒6被设置于螺钉座I的U型开槽22中,并且位于压环2和压紧螺母7之间。 [0052] The connecting rod 6 is connected to a plurality of screws, a connecting rod 6 is provided in the screw seat in the U-shaped slot 22 I, and is located between the pressure ring 7 and a compression nut 2.

[0053] 压紧螺母7可以拧入螺钉座I的上部的内侧面,从而与螺钉座I连接,用于压紧连接棒6。 [0053] The compression nut 7 can be screwed into the upper portion of the inner surface of the screw seat I to I connected to the screw base, for pressing the connecting rod 6. [0054] 从以上实施例可知,根据本发明的动态椎弓根螺钉植入物,在传统椎弓根螺钉的基础上进一步设置了螺钉头套装置并改进了螺钉结构。 [0054] Example apparent from the above embodiment, the dynamic pedicle screw implant according to the present invention, the headgear is further provided with screw means on the basis of traditional pedicle screws and improved screw structure.

[0055] 如现有技术中已知的那样,传统椎弓根万向螺钉在固定后,螺钉头与螺钉座具有一定的角度且螺钉头不能再有任何摆动,属于坚强固定方式。 [0055] As is known in the prior art, the conventional pedicle screw fixation universal screw head and the screw seat has a screw head at an angle and no longer have any oscillating belonging strong fixation. 但是,根据本发明,所述动态椎弓根螺钉植入物还设置有螺钉头套,该螺钉头套的内部为球窝结构,所述螺钉的连接头具有球形外部结构,从而该球窝结构能够与所述螺钉的连接头相配合。 However, according to the present invention, the dynamic pedicle screw implant is also provided with screw caps, screw caps to the interior of the ball and socket configuration, said screw having a spherical head connected to an external structure, such that the ball and socket structure capable of the screw mate connector. 通过上述设置,本发明可以防止脊柱的邻近节段退变,保留脊柱活动度。 With the above arrangement, the present invention can prevent the adjacent segments of spinal degeneration, spinal retained activity. 即,本发明提供了螺钉头套,该螺钉头套的主要作用是将螺钉的连接头包裹住,使得万向螺钉的螺钉头即使在固定后仍然可以在螺钉头套内做多轴向的微小角度摆动。 That is, the present invention provides a screw caps, screw caps primary role is to wrap the screw connector housing, such that the universal screw head of the screw even after the fixing sleeve can still make a slight angle polyaxial screw head swing.

[0056] 而且,根据本发明,所述螺钉头套的下部具有唇结构,该唇结构与所述螺钉的颈部相配合,并布置成使得该唇结构的内侧能够限制螺钉的副摆动角,该唇结构的外侧能够控制螺钉的主摆动角。 [0056] Further, according to the present invention, a lower portion of said screw headgear structure having a lip, the lip structure and the neck screw cooperates, and arranged such that the inside of the sub-lip structure can restrict the swing angle of the screw, which outer lip structure capable of controlling a swing angle of the main screw. 通过上述设置,螺钉头套的唇部与螺钉的颈部设计成可以限制螺钉摆动角度的范围。 With the above arrangement, the lip portion of the screw neck screw caps designed to limit the pivot angle range of the screw. 这种受限制的小角度摆动是本发明的一个重要方面,由此提供的优点是:可以增加螺钉的小角度摆动,可以改进邻近节段的应力分布,降低邻近节段退变可能性,维持脊柱生理活动范围,实现动态固定,更符合临床应用的要求,得到的临床效果更好。 Such a limited small angle swing is an important aspect of the present invention, thereby providing the advantages are: small angle screw can be increased swing can improve the stress distribution of the adjacent segments, adjacent segments to reduce the possibility of degeneration, maintain spine physiological range of motion, dynamic fixed, more in line with the requirements of clinical applications, clinical get better.

[0057] 另外,根据本发明,所述压环的内部具有内凹面,所述内凹面为球形,以便与所述螺钉头套的球形外壁相配合。 [0057] Further, according to the present invention, the inside of the pressure ring has an inner concave surface, the concave surface is spherical, the spherical to mate with the outer wall of the screw caps. 从而,压环的内球面与螺钉头套的外球面配合,使得在螺钉头套包住螺钉并装入螺钉座后具有多轴向的大角度摆动(这点与传统万向螺钉的功能相似,但是实现的结构不同),从而实现传统万向螺钉,以方便医生从各个角度执行植入。 Thus, the inner sphere and the outer spherical surface of the headgear pressure ring screw fit, a screw so that the screw caps and wrap the screw seat loaded with a large angle multi-axial pivot (this point is conventional universal screw similar functions, but to achieve different structures), thereby achieving a conventional screw joint for implantation convenient for doctors to perform from all angles. 即,本发明既能提供植入过程中螺钉大角度的要求,也能提供植入后的小位移摆动。 That is, the present invention provides not only a screw implant procedure requires a large angle, also provides a small swing displacement after implantation.

[0058] 医生在植入操作过程中,根据实际需要可以调整螺钉头与钉座的角度范围,方便螺钉的植入。 [0058] physician during the implantation procedure, the screw may be adjusted according to actual needs and the anvil head angular range, to facilitate screw insertion. 当植入到正确位置时,压紧压紧螺母使得压环与螺钉头套紧密配合,从而限制了螺钉头套的多轴向摆动,也就是锁定了螺钉的植入角度。 When implanted into the correct position, so that the pressure of the compression ring and the compression nut mating screw caps, thus limiting the swing multiaxial screw caps, i.e. the implantation angle locking screw. 这时,位于螺钉球套的螺钉还可以有微小角度的摆动,控制这种摆动的大小只与螺钉球套的唇部设计有关,而与螺钉是否锁紧没有关系。 At this time, the ball screw located set screw may also have a slight angle of swing, swing control of this size is only related to the design and ball screw lip liner, while the locking screws are not related.

[0059]另外,本发明的动态椎弓根螺钉植入物可以由钛合金、钴基合金、镍钛合金等金属材料制成;此外,本发明的植入物的部分结构也可以由聚醚醚酮、PCU、加强聚醚醚酮、超高分子量聚乙烯等高分子或复合材料制成。 [0059] Further, the dynamic pedicle screw implant of the present invention may be made of a titanium alloy, cobalt-based alloys, nickel-titanium and other metal materials; In addition, a partial structure of the implant according to the present invention may also be a polyether ether ketone, the PCU, to strengthen the PEEK, ultra high molecular weight polyethylene polymer or a composite material.

[0060] 对于本领域的普通技术人员而言,可以很容易对本发明的实施例的细节进行各种变型和改进。 [0060] those of ordinary skill in the art, can readily to details of the embodiments of the present invention, various modifications and improvements. 这些变型和改进都落在本发明的构思的范围之内。 Within these variations and modifications fall within the scope of the inventive concept.

Claims (7)

1. 一种动态椎弓根螺钉植入物,包括:螺钉座⑴;压环⑵;螺钉⑷;连接棒(6);以及压紧螺母(7), 其中,所述螺钉(4)包括螺钉主体(16)和连接头(8),该连接头(8)容纳在所述螺钉座(I)内;所述连接棒(6)设置于所述螺钉座(I)的开槽(22)中,并且位于所述压环(2)和所述压紧螺母(7)之间;所述压紧螺母(7)用于拧入所述螺钉座(I)的上部,从而压紧所述连接棒(6), 其特征在于: 所述动态椎弓根螺钉植入物还设置有螺钉头套(3),该螺钉头套(3)的内部为球窝结构(13),所述螺钉(4)的连接头(8)具有球形外部结构,从而该球窝结构(13)能够与所述螺钉(4)的连接头(8)相配合,并且所述压环(2)的内部具有内凹面(19),所述内凹面(19)为球形,以便与所述螺钉头套(3)的球形外壁相配合。 1. A dynamic pedicle screw implant, comprising: a screw seat ⑴; ⑵ pressing ring; ⑷ screw; connecting rod (6); and a compression nut (7), wherein the screw (4) comprises a screw body (16) and the connector (8), the connector (8) received in the screw seat (I); the connecting rod (6) disposed screw seat (I) in the slotted (22) , and located between the pressure ring (2) and said compression nut (7); said compression nut (7) screwed to an upper portion of the screw seat (I), whereby the pressing connecting rod (6), characterized in that: the dynamic pedicle screw implant is also provided with screw caps (3), the interior of the screw caps (3) is a ball and socket structure (13), said screw (4 ) of the connector (8) has a spherical outer structure, inner structure such that the ball (13) can be connected to the screw head (4) to (8) cooperates, and said pressure ring (2) having a concave surface (19), said inner concave surface (19) is spherical, so as to cooperate with said screw caps (3) spherical outer wall.
2.根据权利要求I所述的动态椎弓根螺钉植入物,其特征在于,所述螺钉头套(3)的下部具有唇结构(15),该唇结构(15)与所述螺钉的颈部相配合,并布置成使得该唇结构(15)的内侧能够限制螺钉的副摆动角,且该唇结构(15)的外侧能够控制螺钉的主摆动角。 The dynamic pedicle screw implant according to claim I, wherein the lower portion of the screw caps (3) having a lip structure (15), the lip structure (15) and said neck screw engaged portion, and arranged such that the inner lip structure (15) can restrict the swing angle of the sub-screw, and the outer lip structure (15) capable of controlling the swing angle of the main screw.
3.根据权利要求I所述的动态椎弓根螺钉植入物,其特征在于,所述螺钉头套(3)的球形外壁上具有台阶部(14),以使得所述压环(2)的内凹面(19)与所述螺钉头套(3)的台阶部(14)相接触。 According to claim I of the dynamic pedicle screw implant, characterized in that the outer screw caps (3) having a spherical wall of the stepped portion (14), such that the pressure ring (2) the inner concave surface (19) of the screw caps (3) of the stepped portion (14) is in contact.
4.根据权利要求I或2所述的动态椎弓根螺钉植入物,其特征在于,所述压环(2)的外周与所述螺钉座(I)的内腔配合,从而所述压环(2)能够沿所述螺钉座(I)轴向运动。 The I or dynamic pedicle screw implant according to claim 2, characterized in that the pressure ring (2) of the outer periphery of the screw holder (I) with the lumen, so that the pressure ring (2) can be (I) axial movement along the screw seat.
5.根据权利要求I或2所述的动态椎弓根螺钉植入物,其特征在于,所述螺钉头套(3)的外周具有多个条形开槽(12)。 The I or dynamic pedicle screw implant according to claim 2, characterized in that the screw caps (3) having an outer periphery a plurality of stripe-shaped slot (12).
6.根据权利要求I或2所述的动态椎弓根螺钉植入物,其特征在于,所述动态椎弓根螺钉植入物包括挡圈(5),所述挡圈(5)用于嵌入到所述螺钉座(I)的内腔(21)的下部的凹槽(17)中,同时与所述螺钉头套(3)相接触。 According to claim I or dynamic pedicle screw implant of claim 2, wherein said implant comprises a dynamic pedicle screw ring (5), said retaining ring (5) for fitted into the screw seat (I) of the lumen of the lower portion of the recess (17), and (3) in contact with the screw caps (21).
7.根据权利要求6所述的动态椎弓根螺钉植入物,其特征在于,所述挡圈(5)中设置有开口(18)。 7. dynamic pedicle screw according to claim 6, said implant characterized in that said collar (5) is provided with an opening (18).
CN 201010623046 2010-12-31 2010-12-31 Dynamic screw implant for pedicle of vertebral arch CN102133132B (en)

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PCT/CN2011/078297 WO2012088890A1 (en) 2010-12-31 2011-08-11 Dynamic pedicel screw implant for vertebral arch

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