摘要:
Stabilization systems (30) for stabilizing one or more vertebral levels are provided. The systems (30) include anchors (32, 132, 232, 332) engageable to the vertebrae and an elongate connecting member (50, 150, 250) that maintains distraction between the vertebrae while allowing at least limited vertebral motion of the stabilized vertebral levels. The stabilization systems (30) can be employed alone in non-fusion procedure or in conjunction interbody fusion and/or postero-lateral fusion procedures. The connecting members (50, 150, 250) are structured to maintain a constant or slightly variable distance between the anchors (32, 132, 232, 332) to which the connecting members (50, 150, 250) are connected while the connections of the connecting members (50, 150, 250) with the anchors (32, 132, 232, 332) allow motion.
摘要:
The invention generally concerns a spine stabilization system having one or more flexible elements (30) having an opening or slit (12, 16, 20, 24, 38). The flexible element (30) may be integrally formed in a rod (10, 14) having ends capable of receiving fastener (82, 84, 270, 280). The flexible element (30) may limit rotation, flexion-extension, or lateral bending of the spine. The slit or opening (12, 16, 20, 24, 38) may form helical pattern on the rod (10, 14), and more than one slit or opening may be provided. The flexible element (30) may be conformable to the natural spinal movement.
摘要:
According to the present invention there is provided a device (12000) for providing access to a surgical location within a patient, said device (12000) comprising: an elongate body (12004) having an outer surface (12008), an inner surface (12012), and a distal portion (12016), said inner surface defining a passage (12020) extending through the elongate body along a longitudinal axis (12024) through which surgical instruments can be inserted to the surgical location, said distal portion capable of having an expanded configuration when inserted within the patient wherein the cross-sectional area of said passage (12020) at a first location (12028) is greater than the cross-sectional area of said passage at a second location (12032), wherein the first location is distal to the second location; and characterized in that one or more sleeves (12006) are configured to be fixed relative to said elongate body (12004) along the longitudinal axis to increase or to decrease the length of the passage along the longitudinal axis, wherein said increase or decrease in the length of the passage is independent of the actuation of the distal portion of the elongate body.
摘要:
A device for providing access to a surgical location within a patient is provided. The device includes an elongate body (11004, 12004, 13004) and a sleeve (11006, 12006, 13006). The elongate body (11004, 12004, 13004) has an outer surface (11008, 12008, 13008), an inner surface (11012, 12012, 13012), and a distal portion (11016, 12016, 13016). The inner surface (11012, 12012, 13012) defines a passage (11020, 12020, 13020) that extends through the elongate body (11004, 12004, 13004) along a longitudinal axis (11024, 12024, 13024) through which surgical instruments can be inserted to the surgical location. The distal portion (11016, 12016, 13016) is capable of having an expanded configuration when inserted within the patient. In the expanded configuration, the cross-sectional area of the passage (11020, 12020, 13020) at a first location (11028, 12028, 13028) is greater than the cross-sectional area of the passage (11020, 12020, 13020) at a second location (11032, 12032, 13032), wherein the first location (11028, 12028, 13028) is distal to the second location (11032, 12032, 13032). The sleeve (11006, 12006, 13006) is configured to be moved relative to the elongate body (11004, 12004, 13004) along the longitudinal axis (11024, 12024, 13024) to increase or to decrease the length of the passage (11020, 12020, 13020) along the longitudinal axis (11024, 12024, 13024).
摘要:
A dynamic fixation device is provided that allows the vertebrae to which it is attached to move in flexion within the normal physiological limits of motion, while also providing structural support that limits the amount of translation motion beyond normal physiological limits. The present invention includes a flexible portion and two ends that are adapted for connection to pedicle screws. In at least one embodiment of the present invention, the normal axis of rotation of the vertebrae is substantially duplicated by the dynamic fixation device. The flexible portion of the dynamic fixation device can include a flexible anterior-posterior segment, an anterior-posterior segment bounded by one or more zones with cuts in the rod portions, a flexible accordion-like segment, and/or a hinge portion.
摘要:
The invention relates to an intervertebral stabilisation system for at least three vertebra, comprising pedicle screws (67) that can be fixed to the vertebra, at least one bar (11) for connecting at least two pedicle screws to a rigid reinforcement system and at least one band (33), which can be pre-tensioned and which, when the stabilisation system is implanted, is surrounded by at least one compressible compression body (77) that is located between two neighbouring pedicle screws, said band connecting the pedicle screws to an elastic support system. According to the invention, a common pedicle screw is assigned both to the reinforcement system and to the support system and the band can be or is connected to the bar by means of a fixing element.
摘要:
Systems and methods are provided that include a plate member (120, 140, 160, 180, 600) engageable to the spinal column with an anchor assembly (20, 320, 420, 520, 620, 720). The anchor assembly (20, 320, 420, 520, 620, 720) includes a coupling member (30, 130, 330, 430, 530, 630) having a post (32, 332, 432, 532, 632, 732) extending through at least one opening of the plate member (120, 140, 160, 180, 600) and an anchor member (70) pivotally captured in a receiver portion (34, 334, 434, 534, 634) of the coupling member (30, 130, 330, 430, 530, 630) below a lower surface of the plate member (120, 140, 160, 180, 600). A locking member (90, 590) secures the plate member (120, 140, 160, 180, 600) to the coupling member (30, 130, 330, 430, 530, 630). A crown (50, 150, 250, 350, 550, 650) in the receiver portion (34, 334, 434, 534, 634) of the coupling member (30, 130, 330, 430, 530, 630) is engaged by the plate member (120, 140, 160, 180, 600) to secure the anchor member (70) in position relative to the coupling member (30, 130, 330, 430, 530, 630).
摘要:
A device and method for treating scoliosis or other bone conditions. The device may be attached to vertebrae to provide a distraction force on a concave side of a spinal curve to assist in straightening the spine. The device may include receivers for receiving fasteners for attaching the device to the vertebrae. The receivers may allow the fasteners to move a predetermined amount such that constrained movement between the device and the vertebrae may be achieved. The device may include an expander portion between the receivers to create a pushing force. The expander portion may include various different types of biasing mechanisms to provide a damping force as well as to allow the vertebrae to move with respect to each other.
摘要:
Systems and devices for dynamically stabilizing the spine are provided. The systems include a superior component for attachment to a superior vertebra of a spinal motion segment and an inferior component for attachment to an inferior vertebral of a spinal motion segment. The interconnection between the two components enables the spinal motion segment to move in a manner that mimics the natural motion of the spinal motion segment. Methods are also provided for stabilizing the spine and for implanting the subject systems.