For younger patients with focal cartilage damage, the prospect of a knee replacement has historically been a difficult one. Implants are designed to last fifteen to twenty years, and revision surgery carries significantly higher risk. For this reason, cartilage regeneration techniques have attracted considerable interest within the orthopaedic community as a means of preserving the native joint for as long as possible.
Procedures such as autologous chondrocyte implantation (ACI), matrix-induced ACI (MACI), and osteochondral grafting have evolved considerably over the past decade. Where once these techniques were limited to specialist research centres, they are increasingly available to patients through NHS orthopaedic units with the appropriate expertise.
Patient selection is critical. The best outcomes are seen in younger, active individuals with isolated, well-defined cartilage defects and a well-aligned, stable knee. Patients with widespread osteoarthritis, significant malalignment, or ligamentous instability are unlikely to benefit from cartilage regeneration alone, and a more comprehensive surgical strategy is required.
Recovery timelines are longer than for many other knee procedures, and physiotherapy compliance is essential to achieving a good result. Nevertheless, for the right patient, cartilage regeneration offers the genuine prospect of returning to sport and avoiding or significantly delaying the need for joint replacement.
