Spinal fixation devices and methods of use
First Claim
1. A device assembly configured for use in treatment of a spinal segment, the spinal segment comprising a superior vertebral bone, an inferior vertebral bone and an intervertebral disc space positioned therebetween, the device assembly comprising:
- a first implantable member, the first implantable member comprising a superior surface configured to abut the superior vertebral bone and an inferior surface configured to abut the inferior vertebral bone;
a second implantable member, the second implantable member separately formed from the first implantable member, the second implantable member comprising;
a first extension comprising a first aperture, the first aperture configured to receive a first fastener, the first fastener configured to be at least partially advanced through the first aperture and into a first of the superior vertebral bone or the inferior vertebral bone; and
a second aperture; and
a placement instrument configured to deliver the first implantable member and the second implantable member to the spinal segment, the placement instrument comprising;
a proximal segment comprising a handle extended along a longitudinal axis;
a distal segment configured to engage the first implantable member;
an intermediate segment disposed between the proximal segment and the distal segment, the intermediate segment comprising an intermediate coupler configured to engage the second implantable member; and
a retention apparatus configured to;
(i) extend through the second aperture of the second implantable member, and (ii) engage with the first implantable member, the retention apparatus comprising a member having a distal end, the member further having a length greater than a width thereof, the member configured to align with the longitudinal axis.
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Accused Products
Abstract
Placement apparatus and methods of use for impanation of spacers within an inter-vertebral disc space. In one embodiment, the load-bearing superstructure of the implant is subdivided and the bone forming material is positioned within an internal space of the placement instrument but external to the load bearing elements themselves. At least a portion of the bone graft material is freely contained within the disc space. A method of using the device is also described. In one embodiment, the placement device is used to place the implantable spacers at opposing ends of the disc space using a directly lateral surgical approach.
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Citations
38 Claims
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1. A device assembly configured for use in treatment of a spinal segment, the spinal segment comprising a superior vertebral bone, an inferior vertebral bone and an intervertebral disc space positioned therebetween, the device assembly comprising:
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a first implantable member, the first implantable member comprising a superior surface configured to abut the superior vertebral bone and an inferior surface configured to abut the inferior vertebral bone; a second implantable member, the second implantable member separately formed from the first implantable member, the second implantable member comprising; a first extension comprising a first aperture, the first aperture configured to receive a first fastener, the first fastener configured to be at least partially advanced through the first aperture and into a first of the superior vertebral bone or the inferior vertebral bone; and a second aperture; and a placement instrument configured to deliver the first implantable member and the second implantable member to the spinal segment, the placement instrument comprising; a proximal segment comprising a handle extended along a longitudinal axis; a distal segment configured to engage the first implantable member; an intermediate segment disposed between the proximal segment and the distal segment, the intermediate segment comprising an intermediate coupler configured to engage the second implantable member; and a retention apparatus configured to;
(i) extend through the second aperture of the second implantable member, and (ii) engage with the first implantable member, the retention apparatus comprising a member having a distal end, the member further having a length greater than a width thereof, the member configured to align with the longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A delivery device and implant assembly comprising:
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a first implantable member, the first implantable member comprising a superior surface configured to abut a superior vertebral bone of a spinal segment and an inferior surface configured to abut an inferior vertebral bone of the spinal segment; a second implantable member, the second implantable member separable from the first implantable member and comprising at least a first extension, the first extension comprising a first aperture configured to receive a first fastener, the first fastener sized to be at least partially advanced through the first aperture and into one of the superior vertebral bone or the inferior vertebral bone; and a placement instrument configured to deliver the first implantable member and the second implantable member to the spinal segment, the placement instrument comprising; a proximal segment comprising a handle, the handle having a longitudinal axis and being greater in length than width, the length measured along the longitudinal axis; a first prong comprising; a distal segment comprising a first surface configured to engage the first implantable member; an intermediate segment disposed between the proximal segment and the distal segment and comprising a second surface configured to engage with the second implantable member; and a retention apparatus comprising an elongate member, the elongate member configured to (i) be aligned with the longitudinal axis of the handle, and (ii) engage the first implantable member; wherein the placement instrument is extended from a proximal end of the proximal segment to a distal end of the distal segment; and wherein the first surface of the distal segment is positioned a greater distance from the proximal end than the second surface of the intermediate segment, as measured along the longitudinal axis. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A device assembly configured to deliver a first implantable member and a second implantable member to a spinal segment, the spinal segment comprising a superior vertebral bone, an inferior vertebral bone and an intervertebral disc space disposed therebetween, the first implantable member comprising a superior surface configured to abut the superior vertebral bone and an inferior surface configured to abut the inferior vertebral bone, the second implantable member separately formed from the first implantable member and comprising a first side surface, a second opposing side surface, and at least one extension, the at least one extension comprising a first aperture configured to receive a fastener, the fastener sized to be at least partially advanced through the first aperture and into one of the superior vertebral bone and the inferior vertebral bone, the device assembly comprising:
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a placement instrument configured to deliver the first implantable member and the second implantable member to the spinal segment, the placement instrument comprising; a proximal segment comprising an elongate body extended along a longitudinal axis of the proximal segment, the elongate body comprising a channel aligned with the longitudinal axis; a distal segment; and an intermediate segment positioned at least partially between the proximal segment and the distal segment and comprising at least a first portion of a first extension element, the first portion of the first extension element configured to engage the first side surface of the second implantable member; and a retention apparatus configured for use with the placement instrument, the retention apparatus comprising; an elongate member configured to be aligned with the longitudinal axis of the proximal segment, and for insertion through the channel; and a distal coupler, the distal coupler configured to threadedly engage the first implantable member. - View Dependent Claims (29, 30, 31, 32)
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33. A device assembly configured for use in treatment of a spinal segment, the spinal segment comprising a superior vertebral bone, an inferior vertebral bone and an intervertebral disc space positioned therebetween, the device assembly comprising:
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a first implantable member, the first implantable member comprising a superior surface configured to abut the superior vertebral bone and an inferior surface configured to abut the inferior vertebral bone; a second implantable member, the second implantable member independent of the first member and comprising at least one extension, the at least one extension comprising a first aperture configured to receive a fastener, the fastener sized to be at least partially advanced through the first aperture and into one of the superior vertebral bone or the inferior vertebral bone; and a placement instrument configured to deliver the first and second implantable members to the spinal segment, the placement instrument extended from a proximal end to a distal end and comprising; a proximal segment comprising an elongate member extended along a longitudinal axis; a distal segment; an intermediate segment positioned at least partially between the proximal segment and the distal segment and comprising at least a pair of extension elements configured to straddle at least a portion of the second implantable member; and a retention apparatus comprising at least a distal portion configured to engage the first implantable member; wherein the first implantable member and the second implantable member, when coupled to the placement instrument, are consecutively arranged along the longitudinal axis of the elongate member. - View Dependent Claims (34, 35, 36, 37, 38)
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Specification