Ski season in Colorado is almost here, but if you have ever been tearing down the mountain and heard a pop or a snap, then you know the pain of a torn knee ligament (known medically as an anterior cruciate ligament, or ACL). Now, there’s a cartilage graft called Cartiform to help repair the damage. Dr. Armando Vidal of UCHealth’s Lone Tree Surgery Center is treating the first patient in the state to have the procedure.