Total disc replacement system and related methods
First Claim
1. A method for replacing an intervertebral disc comprising the step of:
- establishing an operative corridor to an intervertebral disc space via a lateral, trans-psoas surgical approach that leaves the Anterior Longitudinal Ligament (ALL) intact and includes monitoring nerves in the psoas muscle with a neurophysiology based monitoring system to avoid damaging said nerves;
preparing the intervertebral disc space for receipt of a disc replacement implant, the disc replacement implant including a first anchor plate with a first surface for contacting a first vertebra adjacent the disc space and a second interior surface having, an articulation recess integrally formed therein a second anchor plate having a third surface for contacting a second vertebra adjacent the disc space and a fourth interior surface, and an intradiscal element integrally joined with the fourth interior surface, the intradiscal element configured to articulate with the articulation recess, the first anchor plate and second anchor plate together having an implant length defined by a distance along an X-axis, the X-axis being generally parallel to the coronal plane when the implant is positioned within the interbody space, an implant width defined by a distance along a Z-axis, the Z-axis being generally parallel to the sagittal plane when the implant is positioned in the intervertebral space, the implant length being between 40 mm and 55 mm and the implant width being between 18 mm and 22 mm;
simultaneously introducing the first anchor plate and second anchor plate through the lateral trans-psoas operative corridor into the intervertebral disc space such that the intradiscal element of the second anchor plate cooperates within the articulation recess of the first anchor plate to post-operatively allow motion between the first and second vertebrae.
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Accused Products
Abstract
A total disc replacement (TDR) system for lateral insertion into the spine, involving a first anchor plate having a first surface for engaging a first vertebra and a second surface including a cutout region, a second anchor plate having a first surface for engaging a second vertebra and a second surface including a cutout region, at least one pair of intradiscal inserts, each insert having a first surface for engaging with said anchor plates and a second surface for engaging with an intradiscal element, and an intradiscal element including a first articular surface having a generally arcuate cross-section for articulating with said first intradiscal insert, and a second generally planar surface for interacting with a second intradiscal insert.
520 Citations
23 Claims
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1. A method for replacing an intervertebral disc comprising the step of:
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establishing an operative corridor to an intervertebral disc space via a lateral, trans-psoas surgical approach that leaves the Anterior Longitudinal Ligament (ALL) intact and includes monitoring nerves in the psoas muscle with a neurophysiology based monitoring system to avoid damaging said nerves; preparing the intervertebral disc space for receipt of a disc replacement implant, the disc replacement implant including a first anchor plate with a first surface for contacting a first vertebra adjacent the disc space and a second interior surface having, an articulation recess integrally formed therein a second anchor plate having a third surface for contacting a second vertebra adjacent the disc space and a fourth interior surface, and an intradiscal element integrally joined with the fourth interior surface, the intradiscal element configured to articulate with the articulation recess, the first anchor plate and second anchor plate together having an implant length defined by a distance along an X-axis, the X-axis being generally parallel to the coronal plane when the implant is positioned within the interbody space, an implant width defined by a distance along a Z-axis, the Z-axis being generally parallel to the sagittal plane when the implant is positioned in the intervertebral space, the implant length being between 40 mm and 55 mm and the implant width being between 18 mm and 22 mm; simultaneously introducing the first anchor plate and second anchor plate through the lateral trans-psoas operative corridor into the intervertebral disc space such that the intradiscal element of the second anchor plate cooperates within the articulation recess of the first anchor plate to post-operatively allow motion between the first and second vertebrae. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification