Vertebral body and disc space replacement devices

A vertebral replacement body device, comprising:

• an upper member having a first end for engaging an endplate of an upper vertebral body and an opposite second end, said upper member defining a chamber extending between said first end and said second end;
• a lower member having a first end for engaging an endplate of a lower vertebral body and an opposite second end, said lower member defining a chamber extending between said first end and said second end;
• and
• a connecting member between said upper member and said lower member, said connecting member including a body having an upper end and a lower end, said connecting member further including an upper extension at said upper end of said body and a lower extension at said lower end of said body, said upper extension being positionable in said chamber of said upper member such that said upper member includes a non-circular interface with said connecting member and said lower extension being positionable in said chamber of said lower member such that said lower member includes a non-circular interface with said connecting member;
• wherein said connecting member includes a chamber extending therethrough, said chamber of said connecting member communicating with at least one of said chamber of said upper member and said chamber of said lower member, wherein:
• said first end of said upper member includes a series of plateau-like surfaces spaced therearound for bearing against the endplate of the upper vertebral body;
• said first end of said lower member includes a series of plateau-like surfaces spaced therearound for bearing against the endplate of the lower vertebral body;
• and
• said plateau-like surfaces of each of said upper member and lower member extend generally parallel to an adjacent vertebral endplate.

A vertebral replacement body device, comprising:

• an upper member having a first end for engaging an endplate of an upper vertebral body and an opposite second end, said upper member defining a chamber extending between said first end and said second end;
• a lower member having a first end for engaging an endplate of a lower vertebral body and an opposite second end, said lower member defining a chamber extending between said first end and said second end;
• and
• a connecting member between said upper member and said lower member, said connecting member including a body having an upper end and a lower end, said connecting member further including an upper extension at said upper end of said body and a lower extension at said lower end of said body, said upper extension being positionable in said chamber of said upper member such that said upper member includes a non-circular interface with said connecting member and said lower extension being positionable in said chamber of said lower member such that said lower member includes a non-circular interface with said connecting member;
• wherein said connecting member includes a chamber extending therethrough, said chamber of said connecting member communicating with at least one of said chamber of said upper member and said chamber of said lower member, wherein:
• said upper end of said body of said connecting member defines an upper end surface extending radially about said upper extension and said lower end of said body of said connecting member defines a planar surface extending radially about said lower extension, said upper extension projecting beyond said upper end surface and said lower extension projecting beyond said lower end surface;
• said second end of said upper member includes a series of plateau-like surfaces spaced therearound for bearing against said upper end surface of said connecting member;
• and
• said second end of said lower member includes a series of plateau-like surfaces spaced therearound for bearing against said lower end surface of said connecting member.

A vertebra replacement body device, comprising:

• an upper member having a first end for engaging an endplate of an upper vertebral body and an opposite second end, said upper member having a wall defining a chamber extending between said first end and said second end;
• a lower member having a first end for engaging an endplate of a lower vertebral body and an opposite second end, said lower member having a wall defining a chamber extending between said first end and said second end;
• a connecting member positionable between said upper member and said lower member, said connecting member having a body with an upper end and a lower end and a chamber extending therethrough, said connecting member further including an upper extension at said upper end of said body and a lower extension at said lower end of said body, wherein:
• said upper end of said body of said connecting member includes an upper end surface adjacent to said upper extension;
• said lower end of said body of said connecting member includes a lower end surface adjacent to said lower extension;
• said second end of said upper member includes an end surface bearing against said upper end surface of said connecting member with said upper end of said body of said connecting member engaged with said wall in said chamber of said upper member in a non-circular interface and said second end of said upper member includes a series of plateau-like end surfaces spaced therearound;
• and
• said second end of said lower member includes an end surface bearing against said lower end surface of said connecting member and said second end of said lower member includes a series of plateau-like surfaces spaced therearound.

A vertebral replacement body device, comprising:

• an upper member having a first end for engaging an endplate of an upper vertebral body and an opposite second end, said upper member having a wall defining a chamber extending between said first end and said second end;
• a lower member having a first end for engaging an endplate of a lower vertebral body and an opposite second end, said lower member having a wall defining a chamber extending between said first end and said second end;
• a connecting member including a body having a chamber extending between an upper end and a lower end of said body, said connecting member positionable between said upper member and said lower member with said chamber of said connecting member in communication with at least one of said chamber of said upper member and said chamber of said lower member, wherein:
• said connecting member and said upper member are telescopically positionable with respect to one another along a non-circular interface for placement of said second end of said upper member against said upper end of said connecting member and said connecting member in engagement with said wall of said upper member in said chamber of said upper member;
• and
• said connecting member and said lower member are telescopically positionable with respect to one another along a non-circular interface for placement of said second end of said lower member against said lower end of said connecting member and said connecting member in engagement with said wall of said lower member in said chamber thereof.

A method for assembling a vertebral replacement body device, comprising:

• providing a connecting member having a body with a chamber extending between an upper end and a lower end;
• telescopically and non-rotatably sliding an upper member axially along the upper end of the connecting member with an end of the upper member in contact with the upper end of the body and the connecting member engaged to the upper member in a chamber of the upper member;
• and
• telescopically and non-rotatably sliding a lower member axially along the lower end of the connecting member with an end of the lower member in contact with the lower end of the body.