All surgery carries a slight degree of risk. However, most people do not have any complications. Knee replacement surgery (arthroplasty) is now a routine and commonly performed operation in the UK.
Someone who is fit and with no other medical problems will be at a lower risk than a person with multiple medical conditions.
Evidence indicates that the risks of complications are reduced, and patient satisfaction with the outcome is increased, if the surgeon is familiar with the procedure..
Your anaesthetist and surgeon will be able to answer any questions you may have about your personal risks from anaesthetics and the surgery itself.