Original sentence: Characterized chondrocyte cells form a much higher quality hyaline cartilage than ordinary chondrocyte cells.In February 2008, a scientific article in the American Journal of Sports Medicine proved that Characterized Chondrocyte Implantation (CCI) results in better structural repair than microfracture surgery when treating symptomatic cartilage defects of the knee.The latest development in cell based cartilage repairs consists of characterizing the chondrocyte cells which will be implanted.They are, therefore, believed to be more durable than average autologous chondrocyte cells