An ultrasound-guided collagen injection activates the joint's own regenerative cells to repair focal knee cartilage defects; 70–85% of treated patients report meaningful symptom relief within three to five years.An ultrasound-guided collagen injection activates the joint's own regenerative cells to repair focal knee cartilage defects; 70–85% of treated patients report meaningful symptom relief within three to five years.
The choice between cartilage repair and knee replacement hinges on whether damage is focal or diffuse. Isolated defects in otherwise healthy joints can be repaired; widespread bone-on-bone osteoarthritis affecting multiple compartments requires replacement instead.The choice between cartilage repair and knee replacement hinges on whether damage is focal or diffuse. Isolated defects in otherwise healthy joints can be repaired; widespread bone-on-bone osteoarthritis affecting multiple compartments requires replacement instead.