METHOD FOR INSERTING AN ARTIFICIAL IMPLANT BETWEEN TWO ADJACENT VERTEBRAE ALONG A CORONAL PLANE

  • US 20120071984A1
  • Filed: 11/29/2011
  • Published: 03/22/2012
  • Est. Priority Date: 06/13/1988
  • Status: Active Grant
First Claim
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1. A method for inserting, into a patient'"'"'s body having skin, an artificial non-bone interbody intraspinal implant into a disc space between two adjacent vertebrae located within a portion of a human thoracic and lumbar spine, the portion of the spine defined by the adjacent vertebrae having an anterior aspect and a posterior aspect being divided by a first plane through transverse processes of the adjacent vertebrae, and having a medial aspect and a lateral aspect, the method comprising the steps of:

  • providing said artificial non-bone implant having an insertion end for insertion first into the patient'"'"'s body and a trailing end and a length there between, the adjacent vertebrae having a spinal disc there between, the spinal disc having a depth measured from an anterior aspect to a posterior aspect of the spinal disc, each of the adjacent vertebrae having a vertebral body having a transverse width perpendicular to the depth of the spinal disc, said length being sized to occupy substantially the full transverse width of the adjacent vertebral bodies, said length being greater than the depth of an inferior vertebral body of the adjacent vertebral bodies, said implant having opposed surfaces oriented toward each of the two adjacent vertebral bodies when inserted between the adjacent vertebral bodies, said opposed surfaces having bone engaging projections configured to engage the adjacent vertebral bodies, said implant having a maximum height between said bone engaging projections of said opposed surfaces and perpendicular to the length of said implant, said length of said implant being greater than said maximum height of said implant;

    making an incision in skin of the body of the patient, the incision being proximate an intersection of the skin and a path having an axis lying in a coronal plane passing through the medial aspect and the lateral aspect of the adjacent vertebrae and anterior to the transverse processes;

    advancing a first surgical instrument having a length into the body of the patient through the incision until proximate the spinal disc along the path and anterior to the transverse processes;

    advancing a second surgical instrument into the body of the patient through the incision and over at least a portion of said length of said first surgical instrument, said second surgical instrument having a distal end and an opposite proximal end and a length there between, said second surgical instrument having a passageway configured to receive a portion of said length of said first surgical instrument therein;

    advancing a third surgical instrument into the body of the patient through the incision and over at least a portion of said length of said second surgical instrument, said third surgical instrument having a distal end for insertion over said second surgical instrument and an opposite proximal end;

    positioning said third surgical instrument such that said distal end of said third surgical instrument is proximate a lateral face of the adjacent vertebral bodies;

    penetrating the lateral aspect of the spinal disc intermediate the adjacent vertebrae from a position anterior to the transverse processes;

    removing from between the adjacent vertebrae at least a portion of the spinal disc to form a laterally facing opening without removing a significant amount of bone from the adjacent vertebral bodies; and

    inserting, from a position anterior to the transverse processes of the adjacent vertebrae and along the path, said implant through said third surgical instrument into the laterally facing opening.

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