Satisfactory long-term MRI after autologous chondrocyte implantation at the knee.

Purpose: Autologous chondrocyte implantation (ACI) to address isolated condylar lesions is supposed to limit degenerative deterioration in neutrally aligned knees. Here, we report long-term results of the first-generation ACI technique with periosteal flap.

Methods: Twelve patients, 29 years old on average, were included on the basis of pre-operative MRI selection of lesions >2 cm2.