Medacta GMK PS is not in use anymore

The purpose of the study is to compare the clinical outcome after two total knee endoprosthesis designs Medacta GMK Sphere and Medacta GMK PS.

Primary outcome measures KOOS, Forgotten Knee Score and range of motion.

Single-center, randomized trial

The clinical outcome measures were measured preoperativ and postoperativ (1 year, 5 year and 10 year).

Secondary outcome measures: number of reoperations and revisions, survival of the prosthesis

The patient population would consist patients with knee osteoarthritis eligible for total knee replacement

The aim of the study is to evaluate the effect of the knee prosthesis design on the patient outcome

Inclusion Criteria:

• patient is eligible for a total knee replacement
• patient is eligible for a Medacta GMK Sphere or Medacta GMK PS knee prosthesis
• patient signed the informed consent

Exclusion Criteria:

• patient is pregnant