A combination of - a patient-specific bone implant ； and - a customized surgical guide for surgical instruments for placement on a patient-specific bone implant, said customized surgical guide comprising - one or more customized guiding elements； - one or more surface structures extending over at least part of the surface of the patient-specific bone implant； and optionally - a connecting structure, connecting said customized guiding elements and said one or more surface structures wherein said one or more surface structures and/or the one or more guiding elements and/or the connecting structure is provided with one or more locking features which ensure a specific interlock of the customized surgical guide with the patient-specific implant.
