1. A surgical tool for repairing a diseased or damaged joint of the patient comprising: a plurality of components including a first component engaging a second component via an interlock mechanism; the plurality of components including: a patient-specific surface for engaging a surface portion of the diseased or damaged joint, at least a portion of the patient-specific surface including articular cartilage information derived from image data of the surface portion of the diseased or damaged joint of the patient; and at least one guide configured to direct movement of a surgical instrument.