Microfragmented Adipose Tissue (M-FATS) for Improved Healing of Surgically Repaired Achilles Tendon Tears: A Preliminary Study.

INTRODUCTION: Tendon healing is a complicated process that results in inferior structural and functional properties when compared with healthy tendon; the purpose of this study was to assess the effects of the adjunct of microfragmented adipose tissue (M-FATS) after the suture of a series of Achilles tendons. METHODS: After complete Achilles tendon tear, 8 patients underwent open suture repair in conjunction with perilesional application of a preparation of M-FATS rich in mesenchymal stem cells. Results were compared with a similar group of patients treated with conventional open suture. Outcomes were evaluated based on range of motion, functional recovery, and complications according to the American Orthopedic Foot and Ankle Society (AOFAS) score and Foot and Ankle Disability Index (FADI). Achilles tendons were examined by ultrasound (US) at 3 months. RESULTS: The AOFAS and FADI scores showed no differences between the 2 groups. US evaluation showed quicker tendon remodeling in the M-FATS group. Adverse events were not documented for both procedures. CONCLUSIONS: The combined application of derived M-FATS for tendon rupture is safe and presents new possibilities for enhanced healing. LEVELS OF EVIDENCE: Level IIIb: Case control study.