[Experience with medial unicompartmental prostheses with a mobile plateau]

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Sports Medicine

Background:

• Unicompartmental knee arthroplasty (UKA) is a recognized treatment for medial osteoarthritis.
• Its minimally invasive approach and high patient satisfaction contribute to its popularity, particularly in younger individuals.

Purpose of the Study:

• To evaluate the physical activity levels of patients post-Oxford III medial UKA.
• To assess the impact of implant positioning and patellofemoral joint osteoarthritis on outcomes.

Main Methods:

• Retrospective study of 136 patients (75.1% follow-up) who received Oxford III medial UKA.
• Evaluations included physical exams, X-rays, and scores: WOMAC, OKS, KSS, UCLA activity, and Turba score.
• Mean follow-up was 4.2 years, with patients averaging 65.2 years at surgery.

Main Results:

• 81% of patients resumed sporting activities post-surgery.
• No increased complications or osteoarthritis progression linked to physical activity.
• Active patients demonstrated significantly higher OKS, KSS, WOMAC, and UCLA scores.
• Proper implant positioning, avoiding valgus malalignment, is crucial for clinical success.

Conclusions:

• Oxford III UKA for medial osteoarthritis achieves high patient satisfaction regarding physical and sporting activities.
• The procedure does not elevate the risk of complications associated with increased activity levels.