What this Trial Is About

Researchers are comparing two types of polyethylene inserts used in total knee replacement surgery: medial pivot polyethylene and ultra-congruent polyethylene. These inserts are part of the prosthetic device designed to replace the knee joint in patients with arthritis. The study aims to evaluate which type better meets patient expectations for pain relief and knee movement after surgery, focusing on the quality of life improvements. Both types of polyethylene aim to provide a stable and lasting contact surface between the metallic components of the knee implant, mimicking natural knee movement. The study involves two groups of participants who will receive total knee arthroplasty using either the medial pivot polyethylene or the ultra-congruent polyethylene insert. These inserts serve as the interface between the metallic femoral unit and the tibial baseplate of the knee prosthesis. The medial pivot system is designed to closely replicate anatomical knee kinematics with a rotational movement similar to a ball and socket. The study compares these two types of inserts through a randomized design, which has not been done before. Participants will be assessed using the forgotten joint score (FJS12) at 45 days and again at 12 months after surgery. This score measures how much patients are aware of their artificial knee during daily activities, reflecting comfort and function. Throughout the study, participants will undergo evaluations to monitor their knee function and recovery. The total participation age range is from 18 to 90 years, and the study tracks outcomes related to pain, movement, and overall knee performance following the replacement surgery.

Comparison of Pivotal Medial Polyethylene Versus Ultra-congruent in Total Knee Arthroplasty