Karolinska Institute: The individualised design of the Episealer Patellofemoral Implant is based on MR imaging. By data processing, a virtual 3D model of the damaged knee surface is created, and the lesion is defined. Subsequently, the Episealer and instruments are designed to remove the damaged tissue as well as to restore the area with a perfectly fitting implant. Using the Epiguide during surgery increases the precision of the surgical procedure for optimal positioning of the implant.