Patient-specific instrumentation is a set of custom-made surgical guides designed for one individual patient. It is most commonly used in knee replacement and knee realignment surgeries to help position bone cuts and implants. The guides are created from preoperative imaging, such as CT or MRI scans, combined with digital surgical planning. The goal is to match the instruments to a person’s anatomy rather than relying only on standard, “one-size” tools.

Navigation-assisted TKA is a form of total knee arthroplasty (total knee replacement) that uses a computerized guidance system during surgery. It helps the surgical team plan and verify bone cuts and implant positioning in real time. It is commonly used in operating rooms for knee arthritis and other end-stage knee joint problems. It is best understood as “standard knee replacement with added digital measurement and alignment tools.”

Computer-assisted TKA is a form of total knee arthroplasty (knee replacement) that uses digital guidance to help plan and place knee implant components. It combines standard knee replacement steps with a navigation system, sensors, or robotic assistance. It is commonly used in hospitals and surgical centers that perform joint replacement surgery.

Robotic-assisted TKA is a form of total knee arthroplasty (knee replacement) performed with computer guidance and a robotic system. It is used to help a surgeon plan bone cuts and implant positioning during knee replacement surgery. The surgeon remains in control, and the robotic technology supports precision and consistency. It is commonly used in hospitals and surgical centers that offer joint replacement care.

Complex primary TKA is a first-time total knee replacement that is more technically demanding than a routine case. It is performed when the knee has deformity, instability, bone loss, or other challenges that require additional planning and specialized implants. It is commonly used for advanced arthritis or post-traumatic knee damage when standard techniques may not provide reliable alignment or stability. Although it is “primary” (not a revision), it can use tools and implant features that overlap with revision surgery.

Revision knee replacement is a surgical procedure to repair or replace parts of a prior knee replacement that is no longer functioning well. It is commonly used when a knee implant becomes painful, unstable, loose, infected, or worn over time. Compared with a first-time (primary) knee replacement, it typically involves more complex planning and reconstruction. The goal is to restore comfort, stability, and usable movement when the original implant has failed or complications have occurred.

Revision TKA means **revision total knee arthroplasty**. It is a surgery that **replaces or repairs parts of a prior knee replacement**. It is commonly used when a first knee replacement no longer works as intended. It is performed in orthopedic hospitals and joint replacement centers.

Revision total knee arthroplasty is a repeat knee replacement surgery done after a prior total knee replacement. It removes and replaces some or all parts of the existing knee implant. It is commonly used when the first knee replacement is painful, unstable, worn, infected, or no longer functions well. It is performed by orthopedic surgeons with specific training in complex joint reconstruction.

Bicompartmental knee arthroplasty is a type of partial knee replacement that resurfaces two damaged compartments of the knee. It is most often considered when arthritis affects two areas but the third compartment is relatively preserved. The goal is to replace only the worn joint surfaces while keeping as much native bone and soft tissue as possible. It is used in orthopedic surgery as an alternative to total knee arthroplasty in selected cases.

Patellofemoral arthroplasty is a partial knee replacement focused on the kneecap joint. It resurfaces the underside of the patella and the groove of the femur where the patella glides. It is most commonly used for arthritis limited to the patellofemoral compartment. It is different from a total knee replacement because the rest of the knee joint is preserved.