Simply put, total knee replacement can be considered for any end-stage osteoarthrosis. The most common of these is primary osteoarthrosis, which is generally described as the effect of “old legs before old age”, and is an indication for surgery if the condition is still painful or even affects normal life after more than 6 months of regular conservative treatment. Secondly, artificial joint replacement can also be considered for conditions such as rheumatoid, hemophilic arthritis or traumatic arthritis that have progressed to a certain level. It is important to note here that artificial knee replacement is an operation aimed at improving the quality of life, and to some extent can be understood as “cosmetic surgery”. Therefore, in addition to the medical indications, the patient’s wishes are particularly important in this type of surgery. When the patient feels that “my knee is hard enough to replace”, it is time to talk to the surgeon about the surgery.