Structurally supporting insert for spinal fusion cage
First Claim
1. An expandable implant comprising:
- a body having a first surface for abutting a first vertebral body, and the body having a proximal surface including a bone graft port and including an attachment port for receiving a threaded portion of an insertion instrument;
a top member moveable with respect to the body, the top member having a second surface for abutting a second vertebral body; and
a structural insert positioned within the body and spaced distally from the proximal surface, such that at least a portion of the body is defined between the structural insert and the proximal surface, the structural insert having a predefined threaded connection configured to detachably and rigidly couple to the threaded portion of the insertion instrument when the threaded portion is received within the attachment port, such that, when the structural insert is coupled to the insertion instrument, the orientation of the body of the implant is rigidly fixed with respect to the insertion instrument and a distal end of the insertion instrument does not exit the implant through the first surface or the second surface,wherein the structural insert is made from a different material than the body.
2 Assignments
0 Petitions
Accused Products
Abstract
An expandable implant includes a structural insert to provide a robust connection between an insertion instrument and the expandable implant. The structural insert can be made from a different material than the remainder of the implant to withstand compressive, tensile, shear, and torsional loads which may be present while inserting the implant into a patient. The structural insert may be formed as part of a bottom member of the implant or may be a separate element inserted into the implant body. The structural insert may provide a threaded connection to an insertion instrument. The expandable implant may include a bone graft port in fluid communication with a bone graft opening extending through the implant body.
153 Citations
19 Claims
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1. An expandable implant comprising:
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a body having a first surface for abutting a first vertebral body, and the body having a proximal surface including a bone graft port and including an attachment port for receiving a threaded portion of an insertion instrument; a top member moveable with respect to the body, the top member having a second surface for abutting a second vertebral body; and a structural insert positioned within the body and spaced distally from the proximal surface, such that at least a portion of the body is defined between the structural insert and the proximal surface, the structural insert having a predefined threaded connection configured to detachably and rigidly couple to the threaded portion of the insertion instrument when the threaded portion is received within the attachment port, such that, when the structural insert is coupled to the insertion instrument, the orientation of the body of the implant is rigidly fixed with respect to the insertion instrument and a distal end of the insertion instrument does not exit the implant through the first surface or the second surface, wherein the structural insert is made from a different material than the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 15, 16)
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9. An expandable implant comprising:
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a body having a bone graft port; a top member having a first surface for abutting a first vertebral body; and a bottom member having a second surface for abutting a second vertebral body, the bottom member secured to the body, and the bottom member forming a base of a structural insert, the structural insert having a predefined threaded connection configured to detachably and securely couple to a threaded portion of an insertion instrument such that, when the structural insert is coupled to the insertion instrument, the orientation of the body of the implant is rigidly fixed with respect to the insertion instrument and a distal end of the insertion instrument does not exit the implant through the first surface or the second surface, wherein the structural insert is made from a different material than the body. - View Dependent Claims (10, 11, 12, 13, 14, 17, 18, 19)
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Specification