Predicting unicompartmental arthroplasty success: a three year Indian study.

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Clinical Outcomes Research

Background:

• Medial compartment osteoarthritis is a common cause of knee pain and disability.
• Unicompartmental knee arthroplasty (UKA) is a surgical option for isolated medial compartment osteoarthritis.
• Evaluating UKA outcomes in diverse populations like India is crucial for global applicability.

Purpose of the Study:

• To assess the three-year clinical outcomes of unicompartmental knee arthroplasty (UKA) in an Indian population.
• To identify predictors of success for UKA in this cohort.
• To analyze the impact of UKA on knee health, function, and pain.

Main Methods:

• Twenty patients with medial compartment osteoarthritis (Ahlbäck grade ≥2) underwent UKA.
• Clinical outcomes were measured using the American Knee Society Score (AKSS), Oxford Knee Score (OKS), and Visual Analogue Scale (VAS) at multiple time points up to three years.
• Preoperative and postoperative limb alignment was assessed using Hip Knee Ankle (HKA) and Knee Joint Line Obliquity (KJO) angles.

Main Results:

• UKA resulted in significant improvements in AKSS, OKS, and VAS scores at three years (P < 0.05).
• Preoperative VAS scores significantly correlated with preoperative and postoperative knee health, function, and limb alignment.
• Preoperative AKSS was also correlated with postoperative functional outcomes, pain levels, and limb alignment.

Conclusions:

• Unicompartmental knee arthroplasty (UKA) provides significant and sustained clinical benefits over three years in an Indian population, with no implant complications.
• Preoperative knee pain and health status are significant predictors of postoperative outcomes.
• Optimizing preoperative pain and knee health may enhance UKA success rates.