Two-year outcomes of MOBILITY Total Ankle Replacement

Area of Science:

• Orthopedic Surgery
• Rheumatology
• Biomedical Engineering

Background:

• Limited literature exists on patient-reported outcomes (PROs) after total ankle replacement (TAR) for osteoarthritis (OA), posttraumatic osteoarthritis (PTOA), and rheumatoid arthritis (RA).
• This study addresses this gap by comparing demographic, clinical, and PROs in patients with these conditions undergoing TAR.

Purpose of the Study:

• To compare demographic data and clinical/patient-reported outcomes among patients with OA, PTOA, and RA who underwent total ankle replacement using the MOBILITY Total Ankle System.
• To evaluate differences in functional scores and patient satisfaction following TAR across these distinct arthritis etiologies.

Main Methods:

• A retrospective analysis of 106 patients undergoing TAR between 2006 and 2009, categorized into OA, PTOA, and RA groups.
• Data collected included demographics, American Orthopaedic Foot & Ankle Society (AOFAS) scores, Foot and Ankle Outcome Score (FAOS), 36-item Short-Form (SF-36) Health Survey, and patient satisfaction.
• Outcomes were assessed preoperatively and at one and two years postoperatively.

Main Results:

• The PTOA group (n=28) was significantly younger, while the RA group (n=22) had a lower BMI, and the OA group (n=56) had more males.
• Preoperatively, PTOA patients reported better SF-36 general health scores. At one year, PTOA and RA groups showed better FAOS pain scores than OA.
• At two years, PTOA patients maintained significantly higher SF-36 general health scores. No significant differences were found in AOFAS, other FAOS, or satisfaction scores between groups at one or two years.

Conclusions:

• Early outcomes following total ankle replacement are comparable across patients with posttraumatic osteoarthritis, osteoarthritis, and rheumatoid arthritis.
• Patient-reported outcomes, particularly pain and general health, show specific trends but overall functional scores and satisfaction are similar between the groups at two years post-surgery.