Medial pivot total knee arthroplasty: Mid-term results.

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Total knee arthroplasty (TKA) is a common procedure for end-stage knee osteoarthritis.
• Medial pivot knee prostheses offer a specific biomechanical design for improved knee function.
• Evaluating mid-term outcomes is crucial for assessing the long-term efficacy of TKA designs.

Purpose of the Study:

• To assess the mid-term clinical results of medial pivot total knee arthroplasty.
• To compare outcomes based on patient age and surgical technique (cruciate ligament retention vs. resection).

Main Methods:

• Retrospective analysis of 304 medial pivot TKAs in 236 patients (2010-2014).
• Data collection included American Knee Society Score, Oxford Knee Score, and flexion angles.
• Follow-up averaged 79.3 months.

Main Results:

• Significant improvements in all measured scores (Functional, Knee, Oxford, Total Knee Society) and flexion angles post-surgery (p<0.01).
• Patients aged <65 years demonstrated significantly better postoperative scores than those aged ≥65 years (p<0.01).
• Resection of both cruciate ligaments led to increased mean flexion angles (p<0.01).

Conclusions:

• Medial pivot total knee prostheses demonstrate reliable mid-term performance.
• Favorable functional outcomes and patient satisfaction are associated with this implant type.
• Age is a significant factor influencing postoperative outcomes in medial pivot TKA.