Abstract: A modular surgical kit for repair of diseased cartilage at an articulating surface of a joint and a design method for a modular surgical kit are disclosed. The modular surgical kit is adapted for removal of damage cartilage and bone and also adapted for insertion of a medical implant a grafted plug or an artificial plug having an implant body with a predetermined cross-sectional profile and adapted for guiding insert tools during repair of diseased cartilage at an articulating surface of a joint. The modular surgical kit includes an implant, and a medical implant a grafted plug or an artificial plug having an implant body with a predetermined cross-sectional profile a guide base having a positioning body with a guide hole through said positioning body and a guide body with a guide channel, the guide channel having a cross-sectional profile that is designed to correspond to the cross-sectional profile of the implant body and having a muzzle.