The MACI Procedure

A Matrix-Induced Chondrocyte Implantation (MACI Procedure) is a treatment to restore  injuries or imperfections on the bones of the knee by implanting lab-grown chondrocyte cells by a sample taken from the patient.
A small sample of healthy cartilage is taken out of the patients knee and sent to a cell processing facility in Cambridge Massachusetts. There the Chondrocytes from the sample are seeded into a collagen membrane to grow. Then the membrane patch is sent back to your doctor, ready for surgery.
An incision is made into the knee and the MACI Patch is placed over the imperfection in the bone, where it is secured in place with a sealant. The knee is then sutured and the patient is allowed to heal and start physical therapy.