DEVICE: iTotal® Patella Sizer (00850268007132)

A hand-held surgical instrument intended to be used during implantation of an orthopaedic prosthesis, either manually or as a computer-assisted surgery (CAS) device, to aid in the navigation/placement of the prosthesis or other instruments [e.g., drill sleeves and guide wires (Kirschner wires), patella saw guide]. It may be used for the following applications: 1) to hold/align/fix/guide other instruments, prostheses, or prosthesis components; 2) to provide relative position landmarks; 3) to ascertain correct spatial orientation or limb alignment; and/or 4) as an interface (non-adaptive) between prosthesis components. This is a reusable device intended to be sterilized prior to use.

A copy of a final patella prosthesis designed to be used during unicompartmental knee replacement surgery or total knee arthroplasty (TKA) to determine the correct alignment, size, and fit of the final prosthesis, and to check that patellar ligament balancing is correct. It is one of a set, or a set, of graduated sizes and is typically made of metal and/or polymer. This is a reusable device intended to be sterilized prior to use.