Laterally expandable spinal prosthesis

摘要

An expandable spinal prosthesis is disclosed, including a first surface having a first plurality of tissue anchors; a second surface opposite the first surface, the second surface having a second plurality of tissue anchors; a first wall between the first and second surfaces, and a second wall between the first and second surfaces, the second wall located opposite the first wall and being movable with respect to the first wall. A surgical instrument is also provided, including an elongated shaft defining a proximal end and a distal end; a first prosthesis engagement element accessible from the proximal end and extending from the distal end; and a second prosthesis engagement element accessible from the proximal end and extending from the distal end, the second prosthesis engagement element including a plurality of gear teeth.

主权项

1. An expandable spinal prosthesis, comprising:
a prosthesis body, including a first surface having a first plurality of tissue anchors and a second surface opposite the first surface, the second surface having a second plurality of tissue anchors, wherein the height of the prosthesis body is defined from said first surface to said second surface, and said height does not change; said prosthesis body defined by four walls including:
a first wall extending between the first and second surfaces, a height of said first wall defining a distance between said first surface and said second surface, wherein said distance between said first surface and said second surface does not change;a second wall extending between the first and second surfaces, the second wall located opposite the first wall;a first sidewall extending from the first wall to the second wall; anda second sidewall extending from the first wall to the second wall; said first wall, first sidewall and second sidewall forming a unitary first portion, wherein the first portion defines a first surgical instrument engagement feature and a second surgical instrument engagement feature; and at least a portion of said second wall forming a second portion, said second portion movable relative to said first portion to extend an overall width of the prosthesis body, wherein the second portion includes a plurality of gear teeth accessible through the second surgical instrument engagement feature.