If you mean wearing the Tynor Knee Cap Small on your natural leg above the artificial limb, it may be used if you have a natural knee joint that requires compression or support, and the size fits properly. However, if you mean wearing it over the prosthetic limb itself, it is generally not intended for that purpose and is unlikely to provide its intended therapeutic benefit. If you need support related to your prosthesis, it is recommended to consult your prosthetist or healthcare professional, who can assess your individual needs and recommend the most appropriate support or accessory for your condition.