Laterally expandable interbody spinal fusion implant

An expandable spinal implant for insertion in a disc space between adjacent vertebrae, comprising:

• a first frame member moveably coupled to a second frame member;
• the first frame member comprising:
• a first longitudinal axis extending from a first proximal end section to a first distal end section, with a first intermediate section disposed therebetween;
• a first outboard face facing generally opposite the second frame member;
• inferior and superior faces disposed on opposing sides of the first outboard face and facing in generally opposite directions;
• the superior face having a first array of upwardly extending anti-backout protrusions thereon in the first intermediate section;
• the inferior face having a second array of downwardly extending anti-backout protrusions thereon in the first intermediate section;
• the first proximal end section including a first proximal flange;
• the second frame member comprising:
• a second longitudinal axis extending from a second proximal end section to a second distal end section, with a second intermediate section disposed therebetween;
• a second outboard face facing generally opposite the first frame member;
• inferior and superior faces disposed on opposing sides of the second outboard face and facing in generally opposite directions;
• the superior face having a third array of upwardly extending anti-backout protrusions thereon in the second intermediate section;
• the inferior face having a fourth array of downwardly extending anti-backout protrusions thereon in the second intermediate section;
• the second proximal section including a second proximal flange;
• a first rigid link pivotally mounted to a to surface of the first proximal flange for rotation about a first pivot axis relative to the first frame member;
• the first link also pivotally mounted to a top surface of the second proximal flange for rotation about a second pivot axis relative to the second frame member;
• a second rigid link pivotally mounted within a slot of to the first distal end section for rotation about a third pivot axis relative to the first frame member;
• the second link also pivotally mounted within a slot of the second distal end section for rotation about a fourth pivot axis relative to the second frame member;
• a third rigid link pivotally mounted to a bottom surface of the first proximal flange for rotation about the first pivot axis relative to the first frame member;
• the third link also pivotally mounted to a bottom surface of the second proximal flange for rotation about the second pivot axis relative to the second frame member;
• the first longitudinal axis extending through the first and third pivot axes;
• the second longitudinal axis extending through the second and fourth pivot axes;
• wherein the implant is expandable from a collapsed configuration to a deployed configuration;
• wherein, in the collapsed configuration:
• the first and second frame members are disposed relatively closer together;
• the outboard faces of the first and second frame members are a first distance apart;
• a first theoretical line from the first pivot axis to the second pivot axis forms an included obtuse first angle relative to a first longitudinal axis;
• wherein, in the deployed configuration:
• the first and second frame members are disposed relatively farther apart;
• the outboard faces of the first and second frame members are a second distance apart;
• the second distance larger than the first distance;
• the first theoretical line forms an included second angle relative to the first longitudinal axis;
• the second angle smaller than the first angle.

A spinal implant for insertion in a disc space between adjacent vertebrae, comprising:

• a first frame member moveably coupled to a second frame member;
• the first frame member comprising:
• a first longitudinal axis extending from a first proximal end section to a first distal end section, with a first intermediate section disposed therebetween;
• a first outboard face facing generally opposite the second frame member;
• inferior and superior faces disposed on opposing sides of the first outboard face and facing in generally opposite directions;
• the superior face having a first array of anti-backout protrusions extending upward away from the implant;
• the inferior face having a second array of anti-backout protrusions extending downward away from the implant;
• the second frame member comprising:
• a second longitudinal axis extending from a second proximal end section to a second distal end section, with a second intermediate section disposed therebetween;
• a second outboard face facing generally opposite the first frame member;
• inferior and superior faces disposed on opposing sides of the second outboard face and facing in generally opposite directions;
• the superior face of the second frame member having a third array of anti-backout protrusions extending upward away from the implant;
• a first rigid link pivotally interconnecting the first and second frame members;
• the first link mounted to the first frame member for rotation relative thereto about a first vertical pivot axis;
• a second link movably interconnecting the first and second frame members and longitudinally spaced from the first link, a first end of the second link being disposed within a first slot in the first distal end section and a second end of the second link being disposed within a second slot in the second distal end section, said first slot of the first frame member extending a greater distance into the first intermediate section than the second slot of the second frame member extends into the second intermediate section;
• wherein the implant is laterally expandable in an expansion direction normal to the first pivot axis from a collapsed configuration to a deployed configuration;
• wherein, in the collapsed configuration:
• the first and second longitudinal axes are disposed relatively closer together;
• the first and second arrays of anti-backout protrusions of the first frame member are a first distance apart;
• wherein, in the deployed configuration:
• the first and second longitudinal axes are disposed relatively farther apart;
• the first and second arrays of anti-backout protrusions of the first frame member are the first distance apart.