Total knee replacement is expected to be a durable procedure with as few complications as possible. To learn from designs used in the past, all revisions, causes for revision and complications should be analyzed. To study the long-term results of the SKI prosthesis, all revisions and complications of the SKI prostheses implanted at Groningen University Hospital were studied in Chapter 3. A survival analysis of the SKI prosthesis was performed, as well as a survival analysis after exchange of the polyethylene insert.