DEVICE: GUARDIAN® (M6842500BP201)

A sterile device designed to provide additional stability for an implanted knee femur prosthesis by extending the attachment of the prosthesis from the distal femur into the midshaft of the bone. It is typically a shaft-like device made of metal [e.g., cobalt-chrome (Co-Cr)] and is often used in prosthesis revision to compensate for bone loss.

A sterile device designed to replace the entire femoral component of a total hip prosthesis implanted during replacement of the total hip prosthesis typically due to wear. The revision device is composed of two or more separate segments (e.g., femoral head, neck, stem, and extensions) designed to be joined (modular) and is coated with a material (e.g., porous materials, hydroxyapatite) intended to improve fixation and stability by promoting bone ingrowth. The device may be made of metal and/or ceramic materials. Fixation devices for implantation (e.g., screws and bolts) may be included and implantation may be performed with or without bone cement.