MPFL Reconstruction: Autograft vs. Allograft Outcomes – A Trend Toward Worse Results with Allograft
MPFL Reconstruction Outcomes Similar with Allograft vs. Autograft, But Trend Suggests Potential Long-Term Differences
Modern ORLEANS — Patients undergoing medial patellofemoral ligament (MPFL) reconstruction experienced comparable complication rates whether the procedure utilized an allograft or autograft, still, early data suggests a potential trend toward diminished clinical outcomes in the allograft group over time, according to research presented at the American Academy of Orthopaedic Surgeons (AAOS) Annual Meeting.
The study, utilizing data from the Justifying Patellar Instability Treatment by Early Results (JUPITER) multicenter study, analyzed 671 patients who underwent isolated MPFL reconstruction with or without a concomitant lateral release or lengthening, or chondroplasty. Researchers categorized patients based on graft type – 285 receiving autografts and 386 receiving allografts.
“We were interested in looking at the demographic factors; complication rates, such as subluxation, dislocation or reoperation; and patient-reported outcome measures at baseline, 1, 2 and 5 years,” explained Lasun O. Oladeji, MD, PhD, assistant professor of clinical orthopedics at the University of Miami.
The analysis revealed no significant differences in complication rates between the two groups, including instances of subluxation, dislocation, or the need for revision surgery. While patient-reported outcome measures were initially similar at baseline, a trend emerged indicating potentially worse clinical outcomes in the allograft group at both the 2-year and 5-year follow-up points.
“The challenge is that, obviously, not all patients were performing patient-reported outcome measures and some of these numbers do not meet the [minimally clinically important difference], but, nonetheless, it was an fascinating trend,” Oladeji stated.
MPFL reconstruction is a surgical procedure designed to stabilize the knee and protect the joint by recreating the medial patellofemoral ligament, a key structure in preventing kneecap dislocation. According to the Hospital for Special Surgery (HSS), the procedure is often recommended for individuals experiencing recurrent patellar instability, often due to sports injuries or anatomical predispositions like patella alta or ligamentous laxity.
The HSS notes that patellar instability is more frequently observed in females than in males. The procedure involves creating a new ligament, utilizing either tissue from the patient (autograft) or a donor (allograft).
Dr. Oladeji can be contacted at [email protected].