Abstract: A surgical device suitable for use in spinal fusion of the cervical vertebrae is provided. The surgical device includes an inner tubular body and an outer tubular body. The inner and outer tubular body each has a lengthwise region and a distal portion with a discontinuous wall forming a fenestration. The fenestrations are alignable to provide a passage through the wall of the surgical device. The surgical device may provide any of several benefits, including unobstructed access to a surgical site, greater stability, and improved tactile control.
Type:
Grant
Filed:
December 5, 2006
Date of Patent:
February 15, 2011
Assignee:
Aesculap Implant Systems, LLC
Inventors:
John A. Usher, Jr., Ronald I. Apfelbaum
Abstract: A spring member for an artificial intervertebral disc includes a substantially annular body including an axially extended bore therethrough defining a passageway. A seat extends radially inward towards the bore for seating therein a bearing member for adjusting and compensating vertebral disc motion. An engagement member extends radially outwardly from the bore for engaging a housing member and securing the spring member within the housing member. The spring member absorbs compressive loads between the bearing member and the housing member while controlling motion and position of the bearing member.
Abstract: An artificial intervertebral disc includes housing members including spaced inner surfaces facing each other and oppositely facing outer surfaces for engaging spaced apart vertebral surfaces. Bearing surfaces extend from each of the inner surfaces for engaging each other while allowing for low friction and compression resistant movement of the housing members relative to each other while under compression. Load sharing pads are disposed between the inner surfaces and about at least a portion of the bearing surfaces for sharing absorption compressive loads with the bearing surfaces while limiting the relative movement of the housing members.
Abstract: An artificial intervertebral disc includes housing members including spaced inner surfaces facing each other and oppositely facing outer surfaces for engaging spaced apart vertebral surfaces. Bearing surfaces extend from each of the inner surfaces for engaging each other while allowing for low friction and compression resistant movement of the housing members relative to each other while under compression. Load sharing pads are disposed between the inner surfaces and about at least a portion of the bearing surfaces for sharing absorption compressive loads with the bearing surfaces while limiting the relative movement of the housing members.